• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method and device for locating a leak (L) in a pipeline network (2) for gaseous or liquid media, detection units (20a, 20b) being provided along the pipeline network (2), comprising a sensor unit (3a, 3b), a recording unit ( 4a, 4b) and a receiving unit (5a, 5b), wherein the method consists in that with the sensor units (3a, 3b) a primary signal (9) is detected, in which vibrations present in at least the line network (2), in that the primary signal (9) is at least partially recorded with the respective recording units (4a, 4b), that a secondary signal (8) emitted by an electromagnetic signal source (1) is received by the receiving unit (5a, 5b), that the secondary signal (8 ) is recorded at least in sections with the respective recording unit (4a, 4b) and that the primary signals (9) detected by different detection units (20a, 20b) are detected by means of the second rsignals (8) are synchronized, wherein the secondary signal (8) has a changing with time the characteristic curve and at least one signal component in a frequency range of 20 kHz to 3 GHz.
    公开号:CH711410B1
    申请号:CH01643/16
    申请日:2014-06-16
    公开日:2018-08-31
    发明作者:Hirt Felix
    申请人:Vonroll Infratec Invest Ag；
    IPC主号:
    专利说明:

    Description: [0001] The present invention relates to a method for locating a leak in a gaseous or liquid media pipeline network, detection units being provided along the pipeline network comprising a sensor unit, a recording unit and a receiving unit, and a measuring apparatus according to the preamble of claim 8th.
    Measuring devices for locating leaks in drinking water supply systems consist of so-called loggers arranged along the supply system. These have a sound sensor for detecting transmitted via the line system and resulting from leaks noise. Output signals of the sound sensors are characteristic electrical signals that are transmitted to processing units and processed there in such a way that the most accurate possible statement about the location of the leak can be made. During the processing of the characteristic signals, on the one hand the propagation velocity of the characteristic signals along the supply system and on the other hand the time of arrival of these signals at the logger are evaluated. In particular, the determination of the exact time of arrival of the characteristic signal is of crucial importance, since the propagation speed due to knowledge of the material used for the supply system is usually known and moreover subject to only insignificant fluctuations. To determine the time of arrival of the characteristic signal at the loggers a time base is needed, which is known at the location of the logger or can be determined at least retroactively for each location. It has therefore already been proposed to use a time signal, for example the time signal transmitter DCF77 for controlling radio-controlled clocks, in order to be able to obtain such a time base in the loggers. By way of example, reference is made to the known teaching according to DE 10 2011 018 713 A1.
    In the known time signals, however, the accuracy is subject to an error of typically +/- 10 ms, which is reflected in a corresponding inaccuracy in the location of the leak. For example, assuming a propagation speed of 1200 m / s for a sound signal along a supply network made of steel, the location of the leak can only be determined to be +/- 12 m. Especially when laid underground under the drinking water supply lines that require extensive excavation work to excavate, a more accurate location is desirable.
    The present invention is therefore an object of the invention to provide a method for locating a leak, which is much more accurate, so that in particular costly excavation work to expose the leakage point can be reduced.
    This object is achieved by the method steps indicated in claim 1. Advantageous embodiments of the present invention and a measuring device are specified in each dependent claims.
    The present invention initially relates to a method for locating a leak in a pipeline network for gaseous or liquid media, wherein along the pipeline network detection units are provided which comprise a sensor unit, a recording unit and a receiving unit. The method according to the invention comprises: detecting primary signals with the sensor units, in which vibrations present at least in the line network are recorded, that the primary signals are at least partially recorded with the respective recording units, that the receiving units receive a signal emitted by an electromagnetic signal source Secondary signal can be used, wherein the secondary signal has a time-varying characteristic curve and at least one signal component in a frequency range of 20 kHz to 3 GHz, - that respective recording units are used for at least partially recording the secondary signal, - that detected by different detection units primary signals be synchronized by means of the recorded secondary signal and - that by locating the synchronized primary signals, the location of a leak is made.
    The inventive method is thus much simpler and cheaper compared to known system. In addition, the selected frequency range, in particular in the frequency range from 20 kHz to 300 MHz, enables a good penetration of earth, so that the signal components can be well recorded, in particular also with buried detection units.
    Further embodiments of the inventive method are that the secondary signal has at least one of the following properties: - at least one signal component is in the frequency range of 30 to 300 kHz; - At least one signal component is in the frequency range of 0.3 to 3 MHz; - At least one signal component is in the frequency range of 3 to 30 MHz; - At least one signal component is in the frequency range of 30 to 300 MHz; - At least one signal component is in the frequency range of 300 MHz to 3 GHz; at least one signal component is a signal of a single broadcasting station in one of the aforementioned frequency ranges; - At least one signal component are superimposed signals from several radio stations in one or more of the above-mentioned frequency ranges.
    An extremely efficient and cost-effective location is made possible by the use of a radio signal of a radio station or a superposition of different radio signals from several radio stations. Here, the secondary signal is delivered virtually free. A specially designed signal source is not required. In addition, the receiving unit may be in the form of a simple radio, which are available at very low cost.
    Further embodiments of the inventive method are that the synchronization of the detected by different detection units primary signals is made by correlation of detected by the corresponding detection units secondary signals.
    Further embodiments of the inventive method are that the primary signal and the secondary signal are each recorded in a channel, wherein the recording is preferably carried out simultaneously.
    Further embodiments of the inventive method are that the primary signal and the secondary signal and / or a processed secondary signal are transmitted to a server.
    Yet other embodiments of the inventive method are that in addition a time signal is recorded by the recording unit.
    The time signal is used for orientation and coarse timing and is therefore not subject to high accuracy requirements. The exact timing of the primary signals recorded at different locations is made via the synchronization with the aid of the secondary signal.
    Further embodiments of the inventive method are that the primary signal and the secondary signal are recorded simultaneously.
    Further, the present invention relates to a measuring device for locating leaks in a network of gaseous or liquid media, wherein along the pipeline network detection units are arranged, comprising a sensor unit for detecting primary signals, a recording unit for recording the primary signals and a receiver unit for receiving a secondary signal. The measuring device according to the invention is characterized in that the receiver units are designed to receive the secondary signal, which has a time-varying characteristic curve and at least one signal component in a frequency range from 20 kHz to 3 GHz, that respective recording units for at least partially recording the secondary signal are formed, that a synchronization unit is provided, with which the detected by different detection units primary signals can be synchronized by means of the recorded secondary signal and that means for comparing the synchronized primary signals for locating a leak are present.
    Further embodiments of the inventive measuring device are characterized in that the secondary signal has at least one of the following properties: - at least one signal component is in the frequency range of 30 to 300 kHz; - At least one signal component is in the frequency range of 0.3 to 3 MHz; - At least one signal component is in the frequency range of 3 to 30 MHz; - At least one signal component is in the frequency range of 30 to 300 MHz; - At least one signal component is in the frequency range of 300 MHz to 3 GHz; at least one signal component is a signal of a single broadcasting station in one of the aforementioned frequency ranges; - At least one signal component are superimposed signals from several radio stations in one or more of the above-mentioned frequency ranges.
    Yet further embodiments of the inventive measuring device are characterized in that the synchronization unit is a correlation unit in which temporal differences between a primary signals recorded by different detection units can be determined via a correlation calculation of the secondary signals detected by the corresponding detection units.
    Further embodiments of the inventive measuring device are characterized in that the primary signal and the secondary signal can be recorded each in a channel, wherein the recording is preferably carried out simultaneously.
    Further embodiments of the inventive measuring device are characterized in that a server is provided in which the primary signal and the secondary signal can be stored.
    Further embodiments of the inventive measuring device are characterized in that in addition a time signal from the recording unit can be recorded.
    Yet further embodiments of the measuring device according to the invention are characterized in that the primary signal and the secondary signal can be recorded at the same time.
    It is expressly understood that the above-mentioned embodiments of the inventive method or the inventive measuring device can be combined in any way. Only those combinations of variants are not suitable, which would lead to a contradiction in combination.
    In the following the invention will be explained in detail with reference to an embodiment shown in a single figure.
    The single FIGURE shows a schematic representation of a line section of a pipeline network with components of an inventive measuring device for locating a leak.
    In the figure, a supply network 2 is shown, which is used for example for drinking water supply. In the schematic illustration according to the figure, only one line section of the practically arbitrarily branched supply network 2 is shown, in which initially at an unknown point a leak L is present, through which a liquid transported in the supply network 2 can escape. It goes without saying that such leaks L have to be repaired so that as far as possible no losses occur in the supply network 2.
    Although the embodiment shown in the figure relates to a drinking water supply system, the present invention can be used in all liquid and also gaseous media. Accordingly, the following explanations apply to both liquid and gaseous media.
    Since in particular in the drinking water supply line network is laid in the ground and repairs are always associated with relatively large and costly grave work, the most accurate location of leaks L is of great importance, as has already been set out in the introduction.
    The measuring device according to the invention for locating leaks L in the line network 2 comprises detection units 20a, 20b along the line network 2, wherein each of the detection units 20a, 20b consists of a sensor unit 3a or 3b, a recording unit 4a or 4b and a receiving unit 5a or 5b exists. In a further embodiment, which will be explained in more detail, a transmission unit 6a or 6b is provided as an additional component of the detection unit 20a, 20b.
    As already explained, the detection units 20a, 20b are arranged along the line network 2. In the case of a drinking water supply network, the detection units 20a, 20b are preferably arranged in what are known as sliders, via which the flow through the conduit network 2 can be controlled. The slides are generally easily accessible to operating personnel via a shaft, whereby the possibility for mounting a sensor unit 3a or 3b in direct contact with the line of the conduit network 2 is given. Instead of a direct contact between sensor unit 3a, 3b and line, alternative components for mounting a sensor unit 3a, 3b can also be used. However, the prerequisite is that the alternative components are in "acoustic" contact with the line. As an alternative component for mounting the sensor unit 3a, 3b, for example, a slide rod, which is provided for actuating the slide. The indirect or guided via alternative components indirect contact of the sensor units 3a, 3b with the line network 2 is necessary in order to detect along the line network 2 transmitted vibrations. Such vibrations or vibrations are caused by an uncontrolled leakage of water due to a leak L in the pipe network 2. The vibrations propagate along the pipe network 2 at a predetermined speed, which are primarily dependent on the material properties of the material used for the pipe network 2. Since the material used for the pipeline network 2 is known, the important size of the propagation velocity of vibrations along the pipeline network 2 is also known.
    The vibrations detected with the sensor units 3a, 3b are referred to below as primary signals 9. The primary signals 9 are supplied to the recording units 4a, 4b for recording.
    For locating the leak L are as accurate as possible times at the locations of the detection units 20a, 20b of importance. It is not mandatory to specify the time. A time reference point which is as accurate as possible is sufficient, which is available to all detection units 20a, 20b, since for a location of the leak L, the time deviation of the arrival of an oscillation originating from the leak L is decisive. According to the invention, a signal source 1 is provided for this purpose, which emits electromagnetic waves, hereinafter referred to as secondary signal 8. The secondary signal 8 is received by the receiving unit 5a, 5b present in the detection unit 20a, 20b and supplied to the recording unit 4a, 4b for recording.
    According to an embodiment of the present invention, it is provided both a recorded with the sensor unit 3a and 3b primary signal 9 and the recorded with the receiving unit 5a, 5b secondary signal 8 in a memory unit (not shown in the figure) of the recording unit 4a , 4b store, wherein for reading a plug for connecting a reader is provided so that the stored information can be read for further processing.
    Alternatively, as indicated in the figure, an embodiment of the present invention is to provide in the detection unit 20a, 20b operatively connected to the recording unit 4a, 4b transmission unit 6a, 6b, the transmission of the information to a central server 7 allows. Thus, it is not necessary to visit the location of the detection units 20a, 20b for reading the information stored therein by operating personnel, since the information can be transmitted automatically, in a predetermined rhythm or after request to the server 7.
    So that a time-shifted transmission of the information from a detection unit 20a, 20b to the server 7 can be made, the recording units 4a, 4b are also in the embodiment with transmission units 6a, 6b each with a memory unit (not shown in the figure) equip ,
    As already mentioned, the secondary signal 8 is generated with the signal source 1, with the aid of which the primary signals 9 recorded by the various detection units 20a, 20b are synchronized with one another (synchronized). It is less important that for the individual primary signals 9 an exact absolute time, i. the exact time at a given history point is obtained, but rather is sufficient that temporal shifts between the primary signals 9, i. that is, the relative differences between the primary signals 9 recorded at the various locations can be obtained.
    For the signal source 1 or for the emitted from the signal source 1 secondary signal 8, the following characteristics arise: - The secondary signal 8 must have a characteristic course changing over time. The secondary signal 8 must have at least one signal component in a frequency range from 20 kHz to 3 GHz.
    The two conditions must be met cumulatively, therefore, the second condition with the frequency-limited signal component must apply to the changing characteristic curve over time.
    While the first condition allows a clear temporal assignment, the second condition allows the reception of the secondary signal 8 even at a certain depth in the ground.
    In further embodiments of the present invention, the secondary signal 8 has at least one of the following properties: At least one signal component is in the frequency range from 0.3 to 3 MHz. This corresponds to the frequency range of medium waves, as used in mid-wave broadcasting, partly shortwave broadcasting, partly at borderline waves, partly military airfield radio and avalanche transceivers. - At least one signal component is in the frequency range of 3 to 30 MHz. This corresponds to the frequency range of shortwave, as used in part in shortwave broadcasting, partly at border waves, amateur radio service and RFID (Radio Frequency Idenfication) applications. - At least one signal component is in the frequency range of 30 to 300 MHz. This corresponds to the frequency range of ultrashort waves used in VHF broadcasting, air navigation, air radio, television signals and radar. - At least one signal component is in the frequency range of 300 MHz to 3 GHz. This corresponds to the frequency range of microwaves used in television signals, cellular mobile radio, microwave ovens, WLAN, RFID, RTLS, short range devices, Bluetooth, GPS and radar. At least one signal component is a signal of a single broadcasting station in one of the above-indicated frequency ranges; - At least one signal component are superimposed signals from several radio stations in one or more of the above-mentioned frequency ranges.
    The measuring device according to the present invention has an extremely simple construction, in particular, when a radio broadcasting station of a radio station or at most superimposed signals from different broadcasting stations are used as the signal source 1. Such signal sources 1 are available anyway and can be used excellently as signal sources 1 in the measuring device according to the invention. In particular, the above-mentioned first condition is fulfilled, which consists in that the secondary signal 8 must have a characteristic curve changing over time.
    In the following, the method according to the invention is explained, as far as it does not already emerge from the above explanations of the measuring device: As mentioned, with the detection units 20a, 20b placed at different locations, a primary signal 9 generated by a leak L is detected by means of the sensor unit 3a, 3b detected and recorded in the recording unit 4a, 4b. The recording can be started at predetermined times - for example, during quiet phases anyway, such as at night - or at regular intervals. Basically - even if this is possible - a continuous recording of signals is not provided.
    The secondary signal 8 can be recorded simultaneously during the recording phases, during which also the primary signal 9 is recorded. In this embodiment, a two-channel recording is performed: in one channel, the primary signal 9 and in the other channel, the secondary signal 8 is recorded. The recordings can then be temporarily stored in the mentioned memory units (not shown in the figure) of the recording units 4a, 4b until they are read out locally with the aid of readers.
    In the embodiment already described with transmission units 6a, 6b in the detection units 20a, 20b (as shown in the figure), the records can be transmitted to the server 7, on which also a synchronization unit (not shown in the figure) can access.
    权利要求:
    Claims (14)
    [1]
    In the synchronization unit, for example, two recordings recorded by different detection units 20a and 20b are then compared by first establishing a temporal reference point by correlation of the two recorded secondary signals 8. This determines the temporal grid of the records. In a further step - again by the synchronization unit - the two recorded by different detection units 20a and 20b primary signals 9 are correlated, whereby the time differences with respect to the obtained by correlation of the two secondary signals 8 reference point can be determined. The differences over time now make it possible to determine an exact position of the leak L over the known path-time-speed relationship via the known signal propagation times along the line network 2. Even if in connection with the above-mentioned method steps of the synchronization unit was mentioned, it is quite conceivable and sometimes common to perform these steps using a computer program. In this sense, the synchronization unit is then implemented by means of appropriate software routines in a computer unit. In a further embodiment of the present invention, the primary signal 9 and the secondary signal 8 are not simultaneously but time-shifted or alternatively recorded. For this reason, this embodiment is also referred to as a single-channel recording. Thus, it is conceivable that a real-time clock contained in the detection unit 20a, 20b is periodically adjusted or adjusted with the aid of the secondary signal 8, this process being carried out, for example, shortly before a recording of the primary signal 9. Depending on the time stability of the real-time clock, the setting process can be performed more or less often. In this embodiment, for example, the signal of the real-time clock is transmitted to the server 7 with the recording of the primary signal 9, or the primary signal can be provided with a stamp of the real-time clock. The further processing by the synchronization unit is correspondingly simplified, but also leads to exact results for the location of a leak L. A specific single-channel recording variant consists in that the secondary signal is recorded for a few seconds before and after the primary signal recording. Thus, the efficient single-channel recording leads to extremely satisfactory location of leaks. claims
    1. A method for locating a leak (L) in a conduit network (2) for gaseous or liquid media, wherein along the conduit network (2) detection units (20a, 20b) are provided, a sensor unit (3a, 3b), a recording unit ( 4a, 4b) and a receiving unit (5a, 5b), wherein the method consists in that - with the sensor units (3a, 3b) primary signals (9) are detected, in which at least the line network (2) existing vibrations are shown, - That the primary signals (9) with the respective recording units (4a, 4b) are recorded at least in sections, - that the receiving units (5a, 5b) are used for receiving a signal emitted by an electromagnetic signal source (1) secondary signal (8), wherein the Secondary signal (8) has a time-varying characteristic curve and at least one signal component in a frequency range of 20 kHz to 3 GHz, - that respective recording units (4 a, 4b) are used for at least partially recording the secondary signal (8), - that the primary signals (9) detected by different detection units (20a, 20b) are synchronized with the aid of the recorded secondary signal (8), and - by comparing the synchronized primary signals (9) the location of a leak (L) is made.
    [2]
    2. The method according to claim 1, characterized in that the secondary signal (8) has at least one of the following properties: - at least one signal component is in the frequency range of 30 to 300 kHz; - At least one signal component is in the frequency range of 0.3 to 3 MHz; - At least one signal component is in the frequency range of 3 to 30 MHz; - At least one signal component is in the frequency range of 30 to 300 MHz; - At least one signal component is in the frequency range of 300 MHz to 3 GHz; at least one signal component is a signal of a single broadcasting station in one of the aforementioned frequency ranges; - At least one signal component are superimposed signals from several radio stations in one or more of the above-mentioned frequency ranges.
    [3]
    3. The method according to claim 1 or 2, characterized in that the synchronization of the detected by different detection units (20a, 20b) primary signals (9) by correlation of the detected by the respective detection units (20a, 20b) secondary signals (8).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the primary signal (9) and the secondary signal (8) are each recorded in a channel, wherein the recording is preferably carried out simultaneously.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the primary signal (9) and the secondary signal (8) and / or a processed secondary signal (8) to a server (7) are transmitted.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that in addition a time signal from the recording unit (4a, 4b) is recorded.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the primary signal (9) and the secondary signal (8) are recorded simultaneously.
    [8]
    8. Measuring device for locating leaks (L) in a conduit network (2) for gaseous or liquid media, wherein along the conduit network (2) detection units (20a, 20b) are arranged, which comprises a sensor unit (3a, 3b) for detecting primary signals (9), a recording unit (4a, 4b) for recording the primary signals (9) and a receiver unit (5a, 5b) for receiving a secondary signal (8), characterized in that the receiver units (5a, 5b) for receiving the secondary signal (8) is formed, which has a time-varying characteristic curve and at least one signal component in a frequency range of 20 kHz to 3 GHz, that respective recording units (4a, 4b) for at least partially recording the secondary signal (8) are formed a synchronization unit is provided with which the primary signal (9) detected by different detection units (20a, 20b) is recorded with the aid of the recorded Secondary signal (8) are synchronized and that means for comparing the synchronized primary signals (9) are present for the detection of a leak.
    [9]
    9. Measuring device according to claim 8, characterized in that the receiver units (5a, 5b) are designed for secondary signals (8) which have at least one of the following properties: - at least one signal component lies in the frequency range from 30 to 300 kHz; - At least one signal component is in the frequency range of 0.3 to 3 MHz; - At least one signal component is in the frequency range of 3 to 30 MHz; - At least one signal component is in the frequency range of 30 to 300 MHz; - At least one signal component is in the frequency range of 300 MHz to 3 GHz; at least one signal component is a signal of a single broadcasting station in one of the aforementioned frequency ranges; - At least one signal component are superimposed signals from several radio stations in one or more of the above-mentioned frequency ranges.
    [10]
    10. Measuring device according to claim 8 or 9, characterized in that the synchronization unit is a correlation unit, in the time differences between a by different detection units (20a, 20b) recorded primary signals (9) via a correlation calculation by the respective detection units (20a, 20b ) detected secondary signals (8) are determinable.
    [11]
    11. Measuring device according to one of claims 8 to 10, characterized in that the primary signal (9) and the secondary signal (8) are each recordable in a channel, wherein the recording units (4a, 4b) are designed for simultaneous recording.
    [12]
    12. Measuring device according to one of claims 8 to 11, characterized in that a server (7) is provided, in which the primary signal (9) and the secondary signal (8) can be stored.
    [13]
    13. Measuring device according to one of claims 8 to 12, characterized in that the recording units (4a, 4b) are formed, in addition to record a time signal.
    [14]
    14. Measuring device according to one of claims 8 to 13, characterized in that the recording units (4a, 4b) for simultaneous recording of the primary signal (9) and the secondary signal (8) are formed.
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    同族专利:
    公开号 | 公开日
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4207067C2|1992-03-06|1996-07-11|Herward Prof Dr Ing Schwarze|Method and device for locating a leak in a pipe|
    GB9619789D0|1996-09-20|1996-11-06|Palmer Environmental Ltd|Leak noise correlator|
    KR101107085B1|2009-09-22|2012-01-20|주식회사 센서웨이|Leak Detection Apparatus And Method Thereof|
    DE102011018713A1|2011-04-26|2012-10-31|Ingenieurgesellschaft F.A.S.T. für angewandte Sensortechnik mit beschränkter Haftung|Measuring system for detecting and positioning leakage in potable water supply network, has transceivers performing control of logger in noise detection operation and processing of temporal amplitude response of sensor output signals|CN106322127A|2016-11-22|2017-01-11|北京科创三思科技发展有限公司|Method for installing built-in infrasonic wave sensor|
    CN108386728B|2018-02-01|2018-12-28|常州常工电子科技股份有限公司|Pipeline leakage detection method and system|
    CN110440143A|2019-08-12|2019-11-12|北京航星网讯技术股份有限公司|Monitoring and warning system based on laser gas detecting devices|
    法律状态:
    2020-10-30| PFUS| Merger|Owner name: VONROLL INFRATEC (INVESTMENT) AG, CH Free format text: FORMER OWNER: VONROLL INFRATEC (INVESTMENT) AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/EP2014/062539|WO2015192869A1|2014-06-16|2014-06-16|Method and measuring device for locating a leak in a pipeline network for gaseous or liquid media|
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