• 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:
    The invention provides improved accuracy and noise immunity when detecting electric fields of objects, during physical and biological research. In the method, the detection of fields is provided by the deviation of the indicator readings from the zero level when the fully shielded sensor is moved relative to the object. The device contains a series-connected sensor in the form of an electrically conductive rod, a low-pass filter, a DC amplifier with gain control and a zero setting, and an indicator, and both the sensor and the rest of the elements are screened with a papa. 2 sec. f-ly, 2 ip. G Yu C with CD 4
    公开号:SU1314964A3
    申请号:SU752163086
    申请日:1975-07-16
    公开日:1987-05-30
    发明作者:Учида Хидео
    申请人:Кансаи Бранч Оф Джэпэн Физик Сайенс Ассошиейшн,Инк (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a measurement technique and can be used to study the electrical properties of objects in physics and biology.
    The purpose of the invention is to improve accuracy and noise immunity by reducing the influence of extraneous electric fields.
    Figure 1 shows the functional diagram of the device for implementing the method; 2 is a measuring circuit.
    The method is carried out as follows.
    A screened sensor connected to the measuring circuit and the Iodicator is placed near the object under study. Prior to measurement, the gain of the measuring circuit is set and the indicator is set to zero. Next, move the sensor towards the object and from it.
    In this case, an emf is induced in the sensor, the sign and magnitude of which, depending on the spatial characteristics of the electric fields created by the object, are displayed by an indicator.
    The screening of the sensor and the choice of the specified direction of movement allow you to know the interference from electric fields created by other objects, as a result of which the magnitude and sign of the indicator deviation can determine the presence of an electric field created by the object under study.
    An apparatus for carrying out the method comprises a sensor made in the form of an electrically conductive rod 1 placed in a screen 2 with slots 3. The size of the slots depends on the frequencies of radiation of interference in the space where the measurements are made and does not affect the characteristics of the screen, in particular can be made in the form of a metal grid.
    The sensor is connected by a shielded wire to the measuring circuit 4, which includes an input low-pass filter 5 connected to a DC amplifier 6, the output of which is connected to the indicator 7. The connection of the power supply unit 8 is also shown here.
    Amplifier 6 constant current (figure 2) is made on the operating devices
    five
    0
    five
    It also contains preliminary 9 and output amplifiers 10.
    A preamplifier, made according to a non-inverting circuit at the operational amplifier I1, contains an input circuit on resistors 12 and 13 with a total resistance of at least 1000 MΩ, a feedback circuit on a capacitor 14 and resistors 15-19, a supply circuit with a voltage of i 1 5 V filters 20 and 21.
    The output amplifier 10 is made on the operational amplifier 22 according to an inverting circuit and contains feedback resistors 23 and 24, a balancing resistor 25, a zero-setting circuit and filters 27 and 28 in
    The output of the amplifier is through 29 with resistors 30 and an indicator 32. Using the switch 29 and the resistors 30 and 31, the sensitivity of the indicator 32 is changed.
    The measuring circuit is placed in a shield and the connections are made with shielded wire.
    resistor 26 power supply circuit switch 31 connect
    The test results of the device and the measurements by the proposed method showed the possibility of determining the electric field of an object even when shielding it, the effect of interference from other sources, including interference caused by ionization and static electricity, is small.
    权利要求:
    Claims (2)
    [1]
    1. A method for detecting and recording electrical phenomena existing around objects, characterized by placing a sensor connected to a measuring circuit near the object under study, setting the required gain and zero position of the indicator and determining the presence of an electric field according to the value of the indicator deviation, in order to increase the accuracy and noise immunity of detection by reducing the influence of extraneous electric fields, the shielded sensor is moved to The pressure of the object in the opposite direction, wherein the fixed plates and the maximum amount of deflection of the indicator, which is determined by the presence of the physical floor.
    313
    [2]
    2. A device for detecting and recording electrical effects existing around objects, containing a sensor connected by a shielded wire to a measuring circuit, which includes a DC amplifier with an input impedance of at least 1000 MΩ, having elements of gain control and setting a zero level, the amplifier output is connected to the indicator from D4
    output signal from the zero level, characterized in that the sensor is made in the form of a shielded electrically conductive rod, and the measuring circuit is also completely shielded and contains a low-pass filter connected to the input of the DC amplifier, and the indicator is connected to the amplifier output through a switch.
    Fig.G
    Editor Y. Sereda
    Compiled by A. Vasiliev
    Tehred N.Glushenko Corrector I.Erdeyi
    Order 2225/59
    Circulation 731 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
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    同族专利:
    公开号 | 公开日
    FR2279112A1|1976-02-13|
    FR2279112B1|1980-09-26|
    JPS5110790A|1976-01-28|
    DE2531742A1|1976-02-12|
    DE2531742B2|1979-12-20|
    DE2531742C3|1980-08-21|
    GB1511662A|1978-05-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4242739A1|1992-12-17|1994-06-23|Thomson Brandt Gmbh|Radio receiver monitoring system|
    US3791617A|1971-07-14|1974-02-12|Resistoflex Corp|Positive opening and closing constrictable tube valve with means for prolonging tube life|
    JPS5051364A|1973-09-05|1975-05-08|
    JPS532792B2|1974-10-15|1978-01-31|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP49081313A|JPS5110790A|1974-07-16|1974-07-16|Hoshagenno fukushahokokenshitsuhoshiki|
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