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Short circuit detector

A technology of detectors and processors, applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve problems such as loss, product damage, circuit board short circuit failure, etc.

Inactive Publication Date: 2014-01-15
SHAANXI HI-TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When debugging a circuit board, almost every hardware engineer will encounter this problem: there is a short circuit fault somewhere on the circuit board
If the short-circuit point cannot be detected, the next debugging work cannot be carried out, and even the product will be damaged and the loss will be heavy.

Method used

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  • Short circuit detector

Examples

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Embodiment Construction

[0010] In the following description, this demo prototype is used as an example for illustration:

[0011] Since the present invention is designed based on the principle of electromagnetic induction, an electric field must be formed on the circuit board to be detected, and then a magnetic field is induced around various traces on the circuit board, and finally the magnetic head in this design is used to induce The resulting magnetic field is converted into an induced current to detect short-circuit points. Therefore, in order to form an electric field, the circuit board to be tested must be powered on, but because the circuit board under test has a short circuit problem, it cannot be directly powered by a power supply, but must be added after a protection circuit. Apply power to the board under test.

[0012] Among them: VCC is the power supply when the tested circuit board is normal; RA is the external adjustable resistance; RL is the tested circuit board, which is abstracted...

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PUM

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Abstract

A short circuit detector comprises a processor and further comprises a magnetic head, a signal conditioning circuit, an A / D switching circuit, a V / I switching circuit and a loudspeaker or a headset which are connected in sequence; the output end of the A / D switching circuit is connected with the processor; the signal conditioning circuit further comprises a V / I switching circuit and a gain conversion circuit which are connected with each other; the input end of a D / A switching circuit is connected with the processor; the gain conversion circuit is controlled by the processor. The short circuit detector designed by the invention can detect short circuit points conveniently and quickly.

Description

technical field [0001] The invention relates to a short circuit detector. Background technique [0002] The inexplicable short-circuit detection problems encountered by the hardware design circuit board during debugging, such as short-circuit of power supply and signal short-circuit, are all short-circuit faults. When debugging a circuit board, almost every hardware engineer will encounter this problem: There is a short circuit fault somewhere on the circuit board. Detecting short-circuit points is basically the most time-consuming process in the hardware debugging process, and it is also the most troublesome thing for all hardware engineers. Even experienced engineers are helpless. It is not as traceable as debugging functional circuits. If the short-circuit point cannot be detected, the next step of debugging cannot be carried out, and even the product will be damaged, resulting in heavy losses. [0003] The reason why the short-circuit problem is such a headache for har...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 王耀斌
Owner SHAANXI HI-TECH IND CO LTD