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Measuring device and method of human body resistance under DC current

A technology of human body resistance and direct current, applied in measuring devices, using digital measurement technology for measurement, measuring electrical variables, etc., can solve problems such as poor safety performance, large measurement error, and complicated operation, and achieve easy portability, light weight, The effect of high safety performance

Active Publication Date: 2012-10-03
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing human body resistance measurement circuit is not only complicated to operate and inconvenient to carry, but also has large measurement errors and poor safety performance

Method used

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  • Measuring device and method of human body resistance under DC current
  • Measuring device and method of human body resistance under DC current
  • Measuring device and method of human body resistance under DC current

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0020] The IEC publication (1974-479) of the International Electrotechnical Commission believes that in the case of DC and power frequency, the human body resistance can be regarded as a non-inductive resistance. This resistance usually refers to between one hand and two feet of a person, or from Resistance from one leg to the other. In the embodiment of the present invention, the resistance between the feet of the human body is used as the resistance of the human body.

[0021] see figure 1 and figure 2 As shown, the human body resistance measuring device under the DC current provided by the embodiment of the present invention includes a DC power supply, an ammeter, a voltmeter, and an A / D conversion circuit connected in sequence, a main controller, a liquid c...

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Abstract

The invention discloses measuring device and method of human body resistance under DC current. The measuring device comprises a DC power supply, an ammeter, a voltmeter, an A / D switching circuit, a main controller, a liquid crystal display and a contact conduction mechanism, wherein the A / D switching circuit, the main controller and the liquid crystal display are sequentially connected; the voltmeter and the ammeter are both connected with the main controller through the A / D switching circuit; the contact conduction mechanism is in contact with human feet when the measurement is performed, and consists of two insulated containers containing a conductive solution and electrode plates; the electrode plates are dipped into the conductive solution and positioned on the internal bottom of the insulated containers; the electrode plates inside one insulated container are electrically connected with one end of the DC power supply; the electrode plates inside the other insulated container are electrically connected with the other end of the DC power supply; and the electrode plate inside one insulated container is electrically connected with one end of the voltmeter, and the other electrode plate is electrically connected with the other end of the voltmeter. The measuring device has the advantages of portability, convenient operation, correct measurement and high safety performance. The invention also provides the measuring method which corresponds to the measuring device.

Description

technical field [0001] The invention relates to a human body resistance measuring device and a measuring method, in particular to a human body resistance measuring device and a measuring method under direct current. Background technique [0002] Electric shock accidents occupy the first place in a large number of safety accidents. Some people (especially women) are more sensitive to electricity, and some people are relatively dull. Even in the same electric shock accident, the severity of injury varies from person to person. These phenomena are all related to an important factor - human body resistance. When studying the safe voltage of power system, people found that the same voltage has different dangers to different body resistances. Therefore, measuring the body resistance is of great significance for determining the safe voltage and how to avoid electric shock. [0003] At present, the value of human body resistance in foreign countries usually refers to the recommende...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/08G01R19/25
Inventor 董晓辉杜忠东谭进
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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