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Power tester of power source

A test device and power supply technology, which is applied in the direction of electric power measurement by applying digital technology, can solve the problems that the test results cannot be displayed visually, the current cannot be continuously changed, and the purchase cost of the power tester is high. Inexpensive, safety-enhancing effects

Inactive Publication Date: 2018-07-20
BOZHON PRECISION IND TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Both of these two test methods have disadvantages: the first one needs to adjust the resistance value of the variable resistor in real time due to the change of the load resistance value due to the increase of the load temperature during the test process, and the current cannot be continuously changed. At the same time, manual measurement is required, and the test results cannot be displayed intuitively; the second test is simple, but the power tester often has a high purchase cost and a large volume, which is only suitable for a single power supply and a large space. It is not suitable for places with many and small test spaces

Method used

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Embodiment Construction

[0027] The embodiments involved in the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, a power supply test device includes an electronic load module, an analog-to-digital conversion module, a microprocessor module, a serial port communication module, and a switching power supply module; Constant current load; the analog-to-digital conversion module converts the analog voltage at both ends of the electronic load module into a digital value for the microprocessor module to read; the microprocessor module communicates with the electronic load module through the I2C interface A, and through the I2C interface A Set the current value output by the electronic load module, the microprocessor module communicates with the analog-to-digital conversion module through the I2C interface B, and reads the digital voltage converted by the analog-to-digital conversion module through the I2C interface ...

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Abstract

The invention provides a power tester of a power source. The test comprises an electronic load module, an analog-to-digital conversion module, a microprocessor module, a serial port communication module and a switching power source module. A field effect transistor is combined with an operational amplifier to form a negative feedback circuit to further control a constant current, the current is adjusted linearly, the current stability is high, sudden and rapid change is avoided, the safety is improved, a microprocessor sets the current magnitude via a DA chip of 12-bit precision, reads the digital voltage value of an analog-to-digital conversion chip of the 12-bit precision and calculates the output power, a higher test precision is ensured, a host monitors a test result via a serial portremotely, convenience is provided for intelligent test, and the power tester is simple in structure, low in cost, flexible in use and especially suitable for testing the power of multiple power sources.

Description

technical field [0001] The invention relates to the technical field of testing devices, in particular to a power supply testing device. Background technique [0002] When measuring the output power of a DC power supply, there are two traditional methods: the first is to use a fixed resistor and a variable resistor as the load to be tested, and use a measuring instrument to measure the voltage at both ends and the current flowing through it; the second The first is to test with a power tester. The positive and negative poles of the power supply to be tested are respectively connected to the positive and negative input terminals of the power tester, and the power tester is started to test and display the test results. Both of these two test methods have disadvantages: the first one needs to adjust the resistance value of the variable resistor in real time due to the change of the load resistance value due to the increase of the load temperature during the test process, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/133
CPCG01R21/133
Inventor 王建福张小伟沈华文张友武
Owner BOZHON PRECISION IND TECH CO LTD
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