Linear optocoupler linearity automatic test device
A technology of automatic test device and linear optocoupler, which is applied in the direction of measuring device, measuring electricity, measuring electric variables, etc., can solve the problems of low degree of automation, complicated operation, low efficiency, etc., and achieve the effect of improving the degree of automation and improving efficiency
Active Publication Date: 2017-02-15
王允
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[0004] The purpose of the present invention is to provide a linear optocoupler linearity automatic test device to solve the problems of low automation, complicated operation and low efficiency in existing test methods
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0031] Such as figure 1 , the basic scheme of the present invention is: a kind of linear optocoupler linearity automatic testing device, comprises test circuit, and test circuit is mainly by signal source circuit 21, signal input circuit 22, signal output circuit 23, analog-to-digital conversion module 24 and microprocessing 25, the output of the signal source circuit 21 is connected to the input of the signal input circuit 22, the output of the signal input circuit 22 is used to connect the input of the linear optocoupler to be tested, and the input of the signal output circuit 23 is used to connect to the linear optocoupler to be tested. The output of the optocoupler; the output of the signal output circuit 23 and the output of the signal source circuit 21 are all connected to the microprocessor 25 through the analog-to-digital conversion module 24 .
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The present invention relates to a linear optocoupler linearity automatic test device, including a test circuit, the test circuit is mainly composed of a signal source circuit 21, a signal input circuit 22, a signal output circuit 23, an analog-to-digital conversion module 24 and a microprocessor 25, the signal The output end of source circuit 21 connects signal input circuit 22, and signal input circuit 22 is used to connect the input of linear optocoupler to be tested, and signal output circuit 23 is used to connect the output of linear optocoupler to be tested; The output of signal output circuit 23 , the output of the signal source circuit 21 are all connected to the microprocessor 25 through the analog-to-digital conversion module 24 . Using a microprocessor, on the one hand, it collects the output signal of the signal source, and on the other hand, it collects the signal processed by the linear optocoupler, and compares the two signals to judge the performance of the linear optocoupler, which improves the automation of the test. degree, improving efficiency.
Description
technical field [0001] The invention relates to an automatic testing device for the linearity of a linear optocoupler. Background technique [0002] Linear optocouplers are widely used in analog signal isolation transmission, such as signal isolators, signal conditioners, isolation transmitters, isolated analog acquisition modules, isolated safety barriers and other equipment are widely used in linear optocouplers, due to linear The linearity of the optocoupler can reach 0.01%, so the linear optocoupler can be used in high-precision signal isolation transmission equipment, such as 0.05% precision high-speed high-precision analog signal isolator, but because the linear optocoupler is used as a semiconductor device, its linearity There is dispersion in the parameters, and not all linear optocouplers can achieve 0.01% linearity. In fact, the linearity of most linear optocouplers is distributed at the level of 0.01% to 0.05%. For linearity with a linearity error of 0.03% or more...
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IPC IPC(8): G01R31/00
Inventor 王允
Owner 王允