Signal time interval and pulse width multiplexing measurement method

Abstract

The invention discloses a signal time interval and pulse width multiplexing measurement method. The method comprises the steps that firstly, a multi-path input module receives multi-path actual signals to be detected, and then detection, separation, extraction and combination of rising edges and falling edges of the signals are achieved through a double-edge detection module; and then time information of the signal is measured through a time-to-digital conversion module, and finally, the time interval and the pulse width of the signal are obtained through a cache calculation module. The method has the advantages of being high in universality, small in occupied resource and high in measurement precision.

Description

technical field [0001] The invention belongs to the technical field of time interval and pulse width measurement, in particular to a signal time interval and pulse width multiplexing measurement method. Background technique [0002] Time measurement has a wide range of applications in daily life, industrial applications, and scientific research. For example, in laser ranging, the distance to the target is calculated by measuring the time difference between the laser and the two signals. In PET medical imaging, the position of positron annihilation in the body is located by time coincidence measurement, thereby generating a human body image. In fields such as high-precision timing and long-distance communication, high-precision time measurement is also required. [0003] By measuring the time difference between the rising and falling edges of the signal, the pulse width of the signal can be measured. Pulse width measurement also has a wide range of applications. For example...

AI Technical Summary

Problems solved by technology

At present, there is also a way to measure the pulse width of a single channel, but it depends on the special layout structure of the internal unit of a certain type of FPGA, and in the rising edge and falling edge measurement, although the two edges occupy the same delayed carry chain, but It also needs to be sequential or inserted, occupying different register resources

The longer the delay chain, the more registers it occupies, and the worse the consistency of the rising and falling edge measurement results.

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