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Time interval digitally quantized event counter

An event counter and time digital technology, which is applied to the measurement of electrical unknown time intervals, devices for measuring time intervals, instruments, etc., can solve the problems of time delay and difficulty in further increasing the measurement frequency, and achieve the effect of ensuring stability and accuracy

Inactive Publication Date: 2010-06-09
INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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AI Technical Summary

Problems solved by technology

Therefore, it needs to process data before outputting results after each event measurement, and there is a certain time delay, making it difficult to further increase the measurement frequency
In addition, the measurement accuracy is also a very important indicator. With the further deepening of scientific research, the measurement accuracy is required to reach the millimeter level, and the corresponding time measurement resolution is required to reach the picosecond (ps) level, which is difficult for current simulation technology. achieved

Method used

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Embodiment Construction

[0028] Attached below figure 2 The specific embodiments of the present invention are described.

[0029] 1. The input circuit of the high-speed comparator is realized by a dedicated comparator chip.

[0030] 2. The 10MHz precision clock source is realized by voltage-controlled constant temperature precision oscillator or rubidium atomic clock.

[0031] 3. The embedded CPU controller is implemented by a field programmable logic array (FPGA) embedded soft core CPU.

[0032] 4. Fractional pulse generating circuit, integer pulse recording circuit, programmable event pulse generator, data output interface circuit based on VHDL language field programmable logic array (FPGA) circuit implementation.

[0033] 5. The time-to-digital conversion unit adopts the time-to-digital conversion chip TDC (TimeDigitalConverter) chip.

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Abstract

The invention relates to a time interval digitally quantized event counter applied to high repetition frequency satellite laser ranging. The time interval digitally quantized event counter belongs to equipment which is capable of measuring a moment when an event occurs, and is established by using a digitized time interval measuring chip, a high-speed comparator input circuit, a high-speed digital counter circuit, a high-speed digital interface circuit and an accurate pulse generator circuit. The event counter can be widely applied in fields of satellite laser ranging, space debris determination, accurate time event, time interval measurement and the like.

Description

Technical field [0001] The invention relates to an event counter applied to the digital quantization of the time interval of high repetition rate satellite laser ranging. [0002] Specifically, through the application of a digital time interval measurement chip, a high-speed comparator input circuit, a high-speed digital counter circuit, a high-speed digital interface circuit and an accurate pulse generator circuit, a device capable of measuring the time of an event can be constructed; it can be widely used in satellite lasers Ranging, space debris determination, precise time events and time interval measurement and other fields. Background technique [0003] In order to measure the distance between the ground and the satellite, it is done by sampling and measuring the round-trip time interval of the laser pulse flying between the ground and the satellite. The measured interval multiplied by half the speed of light is the distance from the point on the ground to the time of the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04F10/00
Inventor 郭唐永王培源邹彤李欣朱威夏界宁谭业春
Owner INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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