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A time measurement device and method

A time measurement and measurement channel technology, which is applied in the direction of electrical unknown time interval measurement, device for measuring time interval, radio wave measurement system, etc. inaccurate effect

Active Publication Date: 2022-02-18
ZVISION TECH CO LTD
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Problems solved by technology

Even if it stabilizes to 0 or 1 later, its stable state is random and has no necessary connection with the input, resulting in an error in the final time measurement result

Method used

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  • A time measurement device and method
  • A time measurement device and method
  • A time measurement device and method

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Embodiment Construction

[0032] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of systems consistent with aspects of the invention as recited in the appended claims.

[0033] figure 1 is a structural schematic diagram of a time measuring device according to an embodiment of the present invention. Such as figure 1 As shown, the time measurement device includes a signal splitter 11, a plurality of measurement channels 12, and an arithmetic operation unit 13. The signal splitter 11 is used to receive the signal to be measured, and divide the signal to be measured into multiple...

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Abstract

The present invention provides a time measurement device and method. The time measurement device includes a signal splitter for receiving a signal to be measured and dividing the signal to be measured into a plurality of sub-signals to be measured; each of the multiple measurement channels A measurement channel is used to measure a sub-signal to be measured in the plurality of sub-signals to be measured; each measurement channel includes: a delay module, a measurement module, and a compensation module; When there are not less than a preset number of similar time measurement results in the result, the final measurement result is calculated according to the similar time measurement results. The technical scheme of the invention can eliminate the problem of inaccurate measurement caused by the metastable state in the laser radar ranging system, improve the accuracy of time measurement, and further improve the accuracy of the ranging system.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a time measuring device and method. Background technique [0002] In ranging systems such as lidar, in order to obtain ranging results, it is necessary to measure the time interval between the emitted laser pulse and the received laser pulse, and multiply the time interval by the speed of light to obtain the distance between the lidar and the target object. Since the speed of light is very fast, the measurement accuracy of the time interval will seriously affect the final ranging accuracy. Therefore, a high-precision time measurement device is of great significance for improving the measurement accuracy of lidar. [0003] In the prior art, a programmable gate array such as an FPGA (field programmable gate array) can be used to implement time measurement. In FPGAs, the failure of a flip-flop or latch to reach an identifiable state within a specified period of time is called me...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04F10/00
CPCG04F10/00G01S7/486
Inventor 夏冰冰石拓
Owner ZVISION TECH CO LTD
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