Measurement of electric current gone through human body by simulation

A measurement method and technology of human body current, applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve problems such as large measurement errors, complex structures, and poor reliability, and achieve low cost, small volume, and small distortion. Effect

Inactive Publication Date: 2006-03-15
上海衡仪器厂有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a measurement method for simulating the current flowing through the human body, which mainly overcomes the poor reliability and large measurement error of the mode (DA30A type true rms voltmeter) obtained by the thermocouple effect in the prior art , complex structure, high cost and other technical problems

Method used

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  • Measurement of electric current gone through human body by simulation
  • Measurement of electric current gone through human body by simulation

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Embodiment Construction

[0018] see figure 2 , it can be seen from the working principle diagram that the measuring device is used to detect the leakage current of the device under test 1 in the working state. The leakage current produces a voltage drop on the 1k-Ω resistor in the measuring device. LED display after true RMS conversion, linear adjustment, and AD conversion. Due to the large measurement range of 0.1μA-10mA, it is displayed in segments, and it is equipped with an out-of-tolerance alarm function, which is convenient for users to use.

[0019] According to the different frequency characteristics of the measured object, the measuring device can make reasonable attenuation in the measurement network by setting various parameters, so that it conforms to the standard frequency characteristic curve.

[0020] The LED display device for displaying the measured value must accurately display the DC signal and the high-frequency true RMS signal generated in the measurement network, and must confo...

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Abstract

An analog method for measuring the current value in 0-1 MH2 range, which is flowing through human body, includes such steps as measuring the voltage drop of said current value on a resistor (1 kiloohm), pre-amplifying, offset controlling, active value transforming, linear regulating, A / D converting and LED displaying. Its advantages are high correctness and reliability and low cost.

Description

Technical field: [0001] The invention relates to a method for measuring current, in particular to a method for measuring the true effective value of the simulated current (leakage current) flowing through the human body within the frequency range of 0-1MHz. Background technique: [0002] At present, the measurement of the simulated current flowing through the human body is mainly based on the method of obtaining the true effective value through the thermocouple effect. The instrument used is the DA30A true RMS voltmeter. For the working principle diagram of DA30A true RMS voltmeter measuring leakage current, please refer to figure 1 ,as the picture shows: [0003] Its measuring frequency range: 10Hz-10MHz, working error ±7%; [0004] Its measurement voltage range: 100μV-300V, measurement error ± 2%, pointer meter display; [0005] The instrument mainly obtains the true effective value through the thermocouple effect, so the structure is complex, the measurement error is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/05G01R19/00
Inventor 王沪育
Owner 上海衡仪器厂有限公司
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