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Loop resistance detection device based on excitation pulse signal

A loop resistance and detection device technology, which is applied in the direction of measuring device, overload protection device, measuring resistance/reactance/impedance, etc., can solve the problems of low circuit safety, easy damage, lack of protection measures, etc., and achieve high safety factor, The effect of strong circuit protection ability

Pending Publication Date: 2021-05-07
无锡扬晟科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the pointer of the multimeter jumps during the rotation of the shaft handle of the potentiometer, it means that the movable contact has a fault of poor contact.
[0003] Although the current loop resistance detection device on the market can be used to detect the resistance value of the resistance, the protection strength of the protection circuit is not enough, and the protection measures are often lacking, which makes the circuit less safe and easy to damage, which needs to be improved.

Method used

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  • Loop resistance detection device based on excitation pulse signal
  • Loop resistance detection device based on excitation pulse signal
  • Loop resistance detection device based on excitation pulse signal

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: See figure 1, a loop resistance detection device based on an excitation pulse signal, used for the mains power supply through the power supply, used for AC-AC, AC-DC step-down rectification and filtering modules, used for circuit conduction and stable output of fixed voltage switches Voltage stabilization module, overvoltage protection module for over-input voltage protection circuit, under-voltage protection module for over-input voltage protection load, over-current protection module for over-input current protection circuit, over-temperature protection module The overheating protection module of the high disconnection circuit, the pulse signal module for outputting the pulse signal, and the resistance detection module for detecting the resistance value of the resistance, the mains power supply is connected to the step-down rectification and filtering module, and the step-down rectification and filtering module is connected to the switch to stabilize the Th...

Embodiment 2

[0036] Embodiment 2, on the basis of embodiment 1, image 3 It is the pin diagram of ICL8211. ICL8211 is a micro-power bipolar monolithic integrated circuit, which is mainly used for precision voltage detection and precision voltage generation. This integrated circuit consists of a precision voltage reference, a comparator, and a pair of output buffers / drivers. Its main advantage is that it can make the power supply work at very low voltage and current, and ordinary standard power supplies cannot adapt to these working occasions. At the same time, due to the unique characteristics of ICL8211, they are very useful in many auxiliary circuits, such as current source, overvoltage protection, programmable reference voltage source and power failure protection applications.

[0037] Figure 4 For the pin diagram of LM324, LM324 series devices are four operational amplifiers with true differential input, with true differential input. They have some significant advantages over stand...

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Abstract

The invention discloses a loop resistance detection device based on an excitation pulse signal. the device comprises a commercial power supply, a step-down rectification filtering module, a switch voltage stabilization module, an overvoltage protection module, an undervoltage protection module, an overcurrent protection module, an overheating protection module, a pulse signal module, and a resistance detection module. The switch voltage stabilization module is connected to the step-down rectification filtering module, the voltage reduction rectification filtering module is connected with the switch voltage stabilization module, the switch voltage stabilization module is connected with the overvoltage protection module, the overvoltage protection module is connected with the undervoltage protection module, the undervoltage protection module is connected with the overcurrent protection module, the overcurrent protection module is connected with the overheat protection module, the overheat protection module is connected with the pulse signal module, and the pulse signal module is connected with the resistance detection module. The device has the advantages that the device is provided with the overcurrent protection circuit, the overvoltage protection circuit, the undervoltage protection circuit and the overheating protection circuit, the circuit protection capability is high when the circuit breaks down, and the safety coefficient of a user is higher.

Description

technical field [0001] The invention relates to the field of resistance detection, in particular to a loop resistance detection device based on an excitation pulse signal. Background technique [0002] The resistance value of the detection circuit is directly measured with a multimeter. Take the potentiometer as an example. Generally, the ohm block of the multimeter is used to measure the two ends of "1" and "2". The reading should be the nominal resistance value of the potentiometer, such as the pointer of the multimeter. If it does not move or the resistance value is very different, it indicates that the potentiometer is damaged. B Check whether the movable arm of the potentiometer is in good contact with the resistor sheet. Use the ohm range of the multimeter to measure both ends of "1", "2" (or "2", "3"), and turn the shaft of the potentiometer counterclockwise to the position close to "off". At this time, the resistance value is smaller the better. Then slowly rotate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R1/36
CPCG01R27/02G01R1/36
Inventor 倪晓宇
Owner 无锡扬晟科技股份有限公司