• 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:
    Inductive system of transmission/reception of data by blocking the generation of harmonics of a ferromagnetic core. The proposed system performs communications between two systems, a master that creates an alternating magnetic field with which it interacts with one or more slaves, responding to frequencies different from the one generated by the master by means of a non-linear magnetic core higher order harmonic generator to those of the magnetic field created by the teacher. The generation of harmonics is controlled by the slave through a short-circuit winding allowing the transmission of data from the slave to the master. The slave can have its own power supply or through the short-circuit coil. This allows to feed microcontrollers in slaves and provide them with intelligence and large storage capacity, making them suitable for security control and monitoring processes. The excitation frequency can be varied since the operation of the slaves does not depend on the frequency of the exciter field. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2667121A1
    申请号:ES201731478
    申请日:2017-12-27
    公开日:2018-05-09
    发明作者:Claudio AROCA HERNÁNDEZ-ROS；Pedro Cobos Arribas；Marina PÉREZ JIMÉNEZ；Jose Luis PÉREZ FERNÁNDEZ
    申请人:Universidad Politecnica de Madrid；
    IPC主号:
    专利说明:

    OBJECT OF THE INVENTION
    The present invention relates to a data transmission system by controlling the harmonic generation of a magnetic core excited by an alternating magnetic field. More specifically, this invention allows a master device to communicate with another or other slaves through magnetic fields of one or more frequencies and that the slave or slaves respond with magnetic fields of frequency multiple of the emission frequency.
    The system finds a broad spectrum of application in object identification systems especially, given its versatility, in the monitoring of industrial or animal husbandry processes and its subsequent transformation for the food industry. Although its use can be extended to the field of security and tracking and traceability of goods
    Preferably the system is intended for the development of intelligent, programmable, readable and recordable systems, which communicate through inductive processes (Smart Induction Programmable Devices; SIPO), which we hope will have a wide range of application in the control and monitoring of products
    BACKGROUND OF THE INVENTION
    Currently, the transmission of information without electrical contacts between a system powered by a power source, master, and another or other slaves, which receive the operating power through the signals generated by the first system, is of great interest. An example of these applications are RFID and near induction communication systems. All these systems are based on the generation by the master of an electromagnetic field, through a system of antennas that is captured by antennas located in the slave. The voltage generated in these antennas is used to power the circuit and transmit data from the master to the slave. This transmission can be done by modulation of amplitude, frequency, phase, etc. The modes of transmission from the slave to the master are very varied and can be:
    a) storing energy in a capacitor and with it generating a field
    electromagnetic to transmit the data by amplitude modulation, of
    frequency, phase .. this method implies that the master transmits a field, turns off the
    transmission and at the end of this, the slave generates its response, generally, to the
    same working frequency of the master.
    b) By modulating the energy dissipated by the slave antenna, this translates into
    changes in the quality factor of the master transmitter circuit.
    c) Using two antennas on the slave: a transmitter and a receiver. This allows
    Master slave transmission at one frequency and master slave at a different frequency.
    In general, all these transmission methods are based on resonant systems where the antenna, which is generally a loop, is coupled to a capacitor to tune to a certain frequency. In some cases, a winding with a ferrite core is used to reduce the antenna size, although the antenna is still a linear device.
    The closest state of the art is the system described in the Spanish patent with publication number ES 2251315 82. The detection of a magnetic material magnetized by an external exciter field generated by the master is based. The magnetic material is located within a short-circuited winding so that the magnetization of the material is modified when opening and closing the circuit. These magnetization changes at the same frequency as the exciter field are detected by a double phase demodulation system. The master and the slave have the same frequency of transmission and reception, therefore, a system as sensitive as detection is required as double phase demodulation since the exciter field is much larger than that produced by the magnetic core, which also requires a Excellent signal compensation.
    DESCRIPTION OF THE INVENTION
    The device of the present invention carries out communications between two systems, a master that creates an alternating magnetic field with which it dialogues with one or more slaves, which respond to frequencies other than that generated by the master through a non-linear magnetic core harmonic generator higher order than the magnetic field created by the teacher. The generation of harmonics is controlled by the slave by means of a short-circuited winding allowing the transmission of data from the slave to the master. The slave can have its own power supply (batteries, mains) or through the short-circuiting coil. In this last case the transmission of energy is very efficient since it is not spent on generating any type of current, all the transmission energy is supplied by the master. This efficiency allows to feed microcontrollers in slaves and provide them with intelligence and large storage capacity, making them suitable for control and monitoring security processes. The excitation frequency can be varied since the operation of the slaves does not depend on the frequency of the exciter field.
    Therefore, in a first aspect of the invention, an inductive system for transmitting / receiving data by blocking the harmonic generation of a ferromagnetic core comprising:
    • a first data transmitter / receiver comprising:
    i. a producing element of a magnetic field 81 exciter at a defined frequency quot; wquot; representative of some data to be transmitted to at least a second data transmitter / receiver;
    ii. a harmonic detection system;
    • a data receiver comprising:
    i. a core of magnetic material with a non-linear magnetization that generates higher order harmonics of the frequency of the field magnetic field 81 exciter;
    ii. a winding Be short-circuitable with a resistive impedance at least one hundred times less than the inductive one that controls the generation of harmonics, which represents data to be transmitted to the first data transmitter / receiver; Y,
    where the harmonic detection system is tunable to the higher order harmonics generated by the second data transmitter / receiver.
    The inductive system for transmitting / receiving data by blocking the harmonic generation of a ferromagnetic core has no elements tuning bias in the first data transmitter / receiver so that the exciter field that generates the data transmission can be of a wide range. frequency range allowing communication with several data transmitters / receivers by changing the excitation frequency. The gap between the frequencies transmitted by the different data transmitters is widened as they are integer multiples of the excitation frequency, therefore a small variation of the frequency of the first transmitter / receiver translates into a large variation in the frequency of data transmission .
    In one embodiment, the winding BC is short-circuitable by a switch controlled by an electronic circuit.
    In one embodiment, by means of an auxiliary winding located in the data transmitter, it allows to feed the electronic circuit that controls the short-circuited winding switch 5 located around the magnetic core, such that the transmission of
    data is performed without interrupting the power of said electronic circuit.
    In one embodiment, the voltage generated in the short-circuited winding to charge capacitors allows the electronic circuit that controls the short-circuit winding switch BC located around the magnetic core to be fed, to
    10 transmit data at a frequency other than the exciter field. The energy consumption necessary to activate the switch is very low since all the energy, for the data transmission, is supplied by the exciter field. In one embodiment, the magnetic field 81 exciter varies its amplitude, frequency or phase to transmit data to the receiver, thus being bidirectional.
    In a second aspect of the invention, the use of the inductive system for transmitting / receiving data by blocking the harmonic generation of a ferromagnetic core defined in any one of the previous embodiments of the first aspect of the invention as an anti-theft device is disclosed. long distance, can be inhibited or activated with the winding switch.
    In a third aspect of the invention, a programmable intelligent induction device (SIPD) is disclosed which comprises the inductive system for transmitting / receiving data by blocking the generation of harmonics of a ferromagnetic core according to any one of the embodiments of the first aspect of the invention. In one embodiment, the intelligent induction programmable device
    25 (SIPD) includes a microcontroller that allows remote recording and reading of data, and therefore develop labels for product tracking with inviolable areas and / or of a different level of security, access by different manipulators, or users of the device given the low consumption in the transmission of data and its independence from the frequency of excitation.
    30 DESCRIPTION OF THE FIGURES In order to complement the description that is to be carried out below and in order to help a better understanding of the invention, the present report is attached
    Descriptive, forming an integral part of it, a set of figures where, with an illustrative and non-limiting nature, the following has been represented:
    Figure 1 shows a scheme of the invention, coil B1 generates a magnetic field of frequency w, represented in the figure, which acts on the magnetic core located within the short-circuitable coil Be and that generates signals of different frequency modulated by the data.
    Figure 2a.- shows the polymer support with the microcircuit integrated in it and next to it the magnetic core that will be integrated in the lower hole.
    Figure 2b.- shows the polymer support with the microcircuit integrated in it, winding and the core inside (not visible). Next to the fully encapsulated device.
    Figure 3.- shows the scheme of the electronic circuit of figure 2, the coil with the core, the switch (a mos-fet), the microcontroller, the power supply and the control signals can be seen.
    Figure 4.- shows a two-way communication scheme of the master with the SPID. Figure 5.- shows a detail of the planar receiving antenna of the master's data reception system.
    PREFERRED EMBODIMENT OF THE INVENTION
    The present invention is based on the transmission of data, between a master who interrogates, and a slave who processes the data to the master responding to the interrogation. The answer is made by a magnetic core located in the slave. The magnetic core is excited by a magnetic field of frequency w, emitted by the master by means of spool B1, figure 1.
    The nucleus is of great magnetic permeability and small de-fan factor, so that under the action of the alternating saturating exciter magnetic field of frequency w, it generates odd harmonics of higher order, if there is no continuous magnetic field superimposed. If there is an overlapping continuous field it also generates higher order even harmonics.
    Around the magnetic core is a solenoid, Be, figure 1, with an electronically activatable switch that short-circuits it. When the switch is closed, the generation of harmonics in the core is blocked, since the f.e. m induced on the solenoid:
    (= w 80S Ncos (w t),
    being the exciter field 8 = 80sen (w t), 60 the amplitude of the magnetic field, S the effective section of the solenoid and N the number of turns, generates an intensity 1:
    - w 80 SN sen (wt) (L w) + _-...: wc.cB; 70 ..: S_N ;; - = C0; cs: ;; C:;: w ...: tquot; l - 'CR (L w) 2 + R2 (L w) 2 + R2
    . d SN2Jl
    sien o L = -, - the solenoid self-induction, the solenoid length and IJ the
    medium permeability. Therefore, if R «Lw, the field created by the solenoid is 8osen (w t) and therefore the total field inside is almost zero and the magnetic material
    it magnets, weakly, only in the linear zone, not generating higher harmonics. The attenuation of high frequency harmonics is more effective than the attenuation of the frequency of the first harmonic.
    In the present invention. The data is transmitted from the slave to the master through the magnetic field, of a frequency different from that of excitation, produced by the magnetic core, magnetized by the excited field created by the master. This field is detected by coil 62, figure 1. The data is transmitted by sequentially blocking, by activating the switch, the harmonics generated by the magnetic core. Unlike the state of the art, data transmission is performed at a frequency other than the frequency of the exciter field.
    With the present invention, all the energy necessary for data transmission is supplied by the exciter field since the energy necessary to short-circuit the solenoid is negligible. The system does not depend on the frequency of the exciter field works for any exciter frequency as long as R «Lw.
    Figure 2a shows the support 1, made of polymer with the electronic circuit 2, the magnetic core 3 and the covers 4 of a SIPD (Smart Induction Programmable Device). Figure 2b shows the device with the same elements of Figure 2a in its final encapsulation and with a winding 5 around it.
    The complete scheme is shown in Figure 3 where the output of the coil BC goes to a voltage bender that is short-circuited with a mos-fet 6. The output of the! -IC 7 connected to the mos-fet door is used to short-circuit the winding and thus transmit data. The input to the IJe is used to receive data through the exciter field. Since the input impedance of the mos-fet is very high, the system can be inhibited indefinitely by leaving the capacitor 8 coupled to the door and the output of the IJC 7 charged at high impedance.
    The transmission from the master to the slave is done using frequency modulation, with the circuit shown in Figure 4. The microcontroller, ~ cn 10, generates two frequencies one corresponding to the quot; Oquot; logical and the other one "1"; logical. The signals are amplified by amplifier 11 and injected into the resonant transmission circuit. The circuit of the
    The transmitter antenna must resonate at two different frequencies, to achieve these two resonances, the impedances are adapted with a magnetic amplifier 12 in series with the producing coil of the exciter field 61. The change of self-induction of the magnetic amplifier 12, allows to adjust the resonance of the circuit, managing to keep the impedances adapted.
    10 In Figure 4, the receiver circuit is also shown. A receiving coil B2, properly tuned to the frequency of the chosen harmonic, gives a voltage that is amplified 13, and shifted to be compatible with the digital input of the microcontroller 10. Counting the number of pulses that arrive, it discriminates between zeroes and ones . The receiving coil consists of a set of planar reels (figure 5)
    15 properly positioned to maximize the detection of the field generated by the magnetic core of the device. The flat reel system is tuned through a tank circuit to select the detection frequency. The signal is amplified and rectified and taken to a microcontroller, which counts the pulses and detects levels according to the received pulses.
    权利要求:
    Claims (6)
    [1]
    1. Inductive data transmission / reception system by blocking the
    Harmonic generation of a ferromagnetic core, characterized in that it comprises:
    • a first data transceiver (10, 11, 12) comprising:
    i. an element producing a magnetic field (B1) exciter at a defined frequency quot; wquot; representative of some data to be transmitted to at least a second data transceiver;
    10 ii. a harmonic detection system;
    • at least a second data transceiver (13) comprising:
    i. a core of magnetic material (3) with a non-linear magnetization that generates higher order harmonics of the magnetic field frequency (B1) exciter;
    15 ii. a winding (Be, 5) short-circuited with a resistive impedance, at least one hundred times less than the inductive one that controls the generation of harmonics, which represents data to be transmitted to the first data transceiver
    ;Y
    where the harmonic detection system is tunable to the higher order harmonics generated by the second data transceiver.
    [2]
    2. Inductive system of transmission / reception of data by blocking the generation of harmonics of a ferromagnetic core according to claim 1, wherein the winding (Be, 5) is short-circuitable by a switch controlled by an electronic circuit
    25 (2).
    [3]
    3. Inductive system of transmission / reception of data by blocking the generation of harmonics of a ferromagnetic core according to claim 2, which by means of an auxiliary winding located in the first data transceiver allows feeding the
    30 electronic circuit (2) that controls the short-circuit winding switch located around the magnetic core (3), so that data transmission is carried out without interrupting the power supply of said electronic circuit.
    [4]
    4. Inductive system of transmission-reception of data by blocking the generation of harmonics of a ferromagnetic core according to claim 2 or 3, wherein the voltage generated in the short-circuited winding to charge capacitors allows feeding the electronic circuit (2) that controls the short-circuit winding switch
    5 (Be, 5) located around the magnetic core (3), to transmit data at a frequency other than the exciter field.
    [5]
    5. Inductive system of transmission / reception of data by blocking the generation of harmonics of a ferromagnetic core according to any of the claims
    10 above, where the magnetic field (B1) exciter varies its amplitude, frequency or phase to transmit data to the second transceiver, being therefore bidirectional.
    [6]
    6. Inductive system of transmission / reception of data by blocking the generation of harmonics of a ferromagnetic core according to any of the claims
    15 above, where the defined frequency quot; wquot; for the exciter field it belongs to a certain frequency range, and where the variation of said frequency within said range allows to select a communication between the first transceiver and different data transceivers.
    Use of the inductive system of transmission-reception of data by blocking the generation of harmonics of a ferromagnetic core defined in any one of claims 1 to 6 as long-distance anti-theft, which can be inhibited or activated with the winding switch. .
    A programmable intelligent induction device (SIPO) characterized in that it comprises the inductive system of transmission-reception of data by blocking the generation of harmonics of a ferromagnetic core according to any one of claims 1 to 6.
    9. Programmable intelligent induction device (SIPO) according to claim 8, wherein the device comprises a microcontroller that allows remote recording and reading of data, and therefore developing labels for product tracking with inviolable areas and / or of different level of security, access by different manipulators, or
    users of the device given the low consumption in the transmission of data and its independence of the frequency of excitation.
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    US16/233,279| US10607464B2|2017-12-27|2018-12-27|Inductive system for data transmission/reception by means of locking the generation of harmonics on a ferromagnetic core|
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