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Signal tester protection circuit

A technology for signal testing and circuit protection. It is used in electrical measurement, power supply testing, circuit devices, etc. It can solve problems such as instrument burnout, decreased test accuracy, and decreased signal test accuracy, so as to prevent damage and avoid system failures.

Pending Publication Date: 2021-11-09
上海海达通信有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A high-precision signal tester is determined by a variety of high-precision components with high accuracy and high stability of the analog circuit, and the biggest destroyer of this circuit is temperature, the change of the ambient temperature of the signal tester , it is very likely to change the characteristic curve of the internal components of the signal tester, resulting in a decrease in the accuracy of the signal test. At the same time, the stability of the power supply also has a great impact on the signal tester itself and the test signal accuracy. Currently, most of the signal testers on the market The tester adopts the operation methods of preheating, zeroing and range selection to avoid the influence of temperature, but the temperature change during use will still reduce the accuracy of the test, and the lack of detection and protection of the power supply of the signal tester also makes due to The instability of the power supply leads to a decrease in the accuracy of the detection data of the signal tester, and even a safety hazard that the instrument burns out

Method used

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Embodiment 2

[0033] Embodiment 2: On the basis of Embodiment 1, please refer to figure 2 , in a specific embodiment of the signal tester protection circuit of the present invention, the power detection module 1 includes a first resistor R1, a second resistor R2 and a potentiometer RP1; the power module 5 includes a main power supply V1;

[0034] Specifically, the first end of the first resistor R1 is connected to the main power supply V1, the second end of the first resistor R1 is connected to the first end of the potentiometer RP1, and the second end of the potentiometer RP1 is connected to the ground through the second resistor R2.

[0035] Further, the signal conditioning module 2 includes a third resistor R3, a first capacitor C1, a second capacitor C2 and a first diode D1; the main control module 4 includes a first controller U1;

[0036] Specifically, the first end of the third resistor R3 is connected to the slider end of the potentiometer RP1 and the first end of the first capacit...

Embodiment 3

[0040] Embodiment 3: On the basis of Embodiment 2, please refer to image 3 , Figure 4 with Figure 5 , in a specific embodiment of the signal tester protection circuit of the present invention, the temperature detection module 3 includes a first temperature sensor J1, a second temperature sensor J2, a first power supply +5V and a fourth resistor R4;

[0041] Specifically, the first end of the first temperature sensor J1 and the first end of the second temperature sensor J2 are connected to the first power supply +5V and the first end of the first resistor R1, the second end of the first temperature sensor J1 is connected to the second The second end of the temperature sensor J2 is grounded, and the third end of the first temperature sensor J1 and the third end of the second temperature sensor J2 are connected to the second end of the main control module 4 .

[0042] Further, the temperature adjustment module 7 includes a first cooling unit 701 and a second cooling unit 702...

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Abstract

The invention discloses a signal tester protection circuit, which relates to the technical field of signal testers and comprises a power supply detection module, a signal conditioning module, a temperature detection module, a main control module, a power supply module, a power supply switching protection module and a temperature adjusting module. The power supply detection module is used for detecting voltage of a power supply, the signal conditioning module is used for processing detected signals, the temperature detection module is used for detecting temperature, the main control module is used for receiving and processing the signals and outputting control signals and data signals, the power supply switching protection module is used for switching power supplies, and the temperature adjusting module is used for adjusting temperature. According to the signal tester protection circuit, temperature detection is adopted, a semiconductor chilling plate is matched with a radiator to effectively and comprehensively cool the signal tester, and system faults and even burnout caused by overheating of components of the signal tester are avoided; and the power supply of the signal tester is detected, so that the signal tester is prevented from being damaged due to the fault of the power supply.

Description

technical field [0001] The invention relates to the technical field of signal testers, in particular to a signal tester protection circuit. Background technique [0002] A high-precision signal tester is determined by a variety of high-precision components with high accuracy and high stability of the analog circuit, and the biggest destroyer of this circuit is temperature, the change of the ambient temperature of the signal tester , it is very likely to change the characteristic curve of the internal components of the signal tester, resulting in a decrease in the accuracy of the signal test. At the same time, the stability of the power supply also has a great impact on the signal tester itself and the test signal accuracy. Currently, most of the signal testers on the market The tester adopts the operation methods of preheating, zero adjustment and range selection to avoid the influence of temperature, but the temperature change during use will still lead to a decrease in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/40G01R1/36H02J9/06
CPCG01R31/00G01R31/40G01R1/36H02J9/068
Inventor 吴超郑俊棠张晨伟夏天马飞翔
Owner 上海海达通信有限公司
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