Liquid crystal sensing collision measurement device and method
A measuring device and sensing technology, applied in the direction of educational appliances, instruments, teaching models, etc., can solve the problems that students are difficult to understand the magnetic linear displacement sensor, lack of measuring instruments, etc.
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[0015] In conjunction with the accompanying drawings, the working and circuit conditions of a liquid crystal sensor collision measurement device and method will be described in detail below.
[0016] The digital signal processor in the host of the measuring instrument needs to access memory and other peripheral chips, so a decoder is needed for access control and address decoding. The chip used in the decoding circuit of the measuring instrument is 74F138. Usually the clock frequency of TMS320C31 is 33MHz, and the instruction cycle is 60ns, so the running speed is very fast. The operating speed of peripheral devices must meet the timing requirements of DSP. DSP allows a read access time of 35ns, and the delay of 74F138 from address line input to chip select signal output is less than 10ns, which has a margin to meet the timing requirements of DSP.
[0017] The AD converter of the A / D circuit of this measuring instrument is 12-bit analog-to-digital converter AD1674 from Americ...
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