A method and device for measuring the transmission time of electrical signals in a dual-frequency modulation wire
A technology for transmitting time and electrical signals, which is applied in the direction of measurement and phase measurement. It can solve the problems of complex circuit design, high cost, and limited measurement accuracy by oscilloscopes, and achieve the effects of high degree of automation, large range, and convenient and flexible operation.
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[0025] The implementation examples of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0026] Part number description in the figure: 1 clock source, 2 master control unit, 3 standard signal generation unit, 4 conditioning amplifier unit, 5 phase difference measurement unit, 6 wire to be tested, 7 display unit.
[0027] A method for measuring the transmission time of an electrical signal in a dual-frequency modulation wire, the method comprising the following steps:
[0028] ①. Controlled by the timing control signal, the modulation frequency is sequentially generated as f 1 (period is T 1 ) and f 2 (period is T 2 ) sine wave signal, which is conditioned and amplified in turn and then divided into two paths, one path directly enters the phase difference measurement unit as a reference signal, and the other path enters the wire to be tested in turn, and then enters the phase difference measurement unit in turn as the sig...
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