Voltage measurement calibration system and method
A voltage measurement and measurement system technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of large volume, difficult integration, and inadaptability of standard voltage sources, and achieve small loss of accuracy, wide voltage range, and flexible increase sexual effect
Pending Publication Date: 2021-03-26
珠海市运泰利自动化设备有限公司
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[0004] However, the above scheme has the following disadvantages: the standard voltage source is large in size and difficult to integrate, and is no longer suitable for the consumer electronics testing industry; therefore, it is urgent to design a voltage measurement scheme with small size, low cost, high precision and strong compatibility to solve the above problems
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[0034] The details of the present invention are as follows.
[0035] like image 3 and Figure 4 As shown, the present invention includes a logic control unit 1, a voltage measurement unit 2, an instrument measurement system 3, a storage unit 4 and a host computer 5, and the logic control unit 1 is connected to the voltage measurement unit 2 and the instrument measurement system 3 respectively. , the storage unit 4 and the host computer 5 are connected in communication, and the instrument measurement system 3 is connected to the host computer 5 by signals. The logic control unit 1 is used to receive an instruction signal from the upper computer 5, collect signals uploaded by the voltage measurement unit 2 and the instrument measurement system 3, send a control signal to the voltage measurement unit 2, and The calibration coefficients are stored in the storage unit 4; in this embodiment, the logic control unit 1 is mainly composed of FPGA, MCU and peripheral circuits thereof....
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The invention provides a voltage measurement calibration system and method which are small in size, low in cost, high in precision and high in compatibility. The system comprises a logic control unit(1), a voltage measurement unit (2), an instrument measurement system (3), a storage unit (4) and an upper computer (5). The method comprises the following steps: step a, a DAC of the logic control unit generates a plurality of analog voltages; b, voltage values are read through the voltage measurement unit (2) and the instrument measurement system (3) respectively, and two groups of voltage values are read by the upper computer; c, calculating is carried out to obtain a calibration coefficient; and step d, the upper computer (5) writes the obtained calibration coefficient into the storage unit (4), and then performs voltage calibration on different voltage measurement channels of the voltage measurement unit (2) by using the calibration coefficient. The method and device can be applied tothe field of electronic product detection.
Description
technical field [0001] The invention relates to the field of electronic product detection, in particular to a voltage measurement and calibration system and method. Background technique [0002] For electronic products, voltage is an essential indicator to measure product functions and performance, and all products require the measurement of product voltage. With the improvement of product functions and performance, the logic level and analog voltage tend to be subdivided and diversified. In order to accurately judge whether the product is normal or not, the voltage measurement results are required to be more accurate. The traditional solution is to use Keysight34410A, Keysight 34420A and other instruments to measure the voltage. like figure 1 . But standard instruments are expensive and not suitable for mass-produced test / measurement equipment. [0003] For the test equipment industry, the current trend is to use analog and digital circuits to implement voltage measurem...
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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 汪金达李盛平曾令南吴明徽
Owner 珠海市运泰利自动化设备有限公司