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Equivalent sampling device for time-delay amount automatic correction

A technology of equivalent sampling and automatic correction, which is applied in the direction of instruments, computer control, simulators, etc., can solve the problems of radar echo information loss, redundancy, equivalent sampling inhomogeneity, etc., and achieve high measurement accuracy and circuit structure Simple, real-time corrective effects

Active Publication Date: 2016-04-13
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Since the programmable delay chip is affected by temperature, its delay resolution will change with the change of temperature, resulting in the non-uniformity of equivalent sampling
This non-uniform equivalent sampling will cause some information loss or redundancy of the radar echo

Method used

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  • Equivalent sampling device for time-delay amount automatic correction
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Embodiment Construction

[0034] The equivalent sampling device for automatically correcting the delay amount of the present invention is based on a programmable delay chip and a programmable logic gate array FPGA, wherein the automatic correction process of the delay amount mainly includes: using the FPGA to measure the delay accuracy of the programmable delay chip in real time ; Then automatically adjust the delay amount in the equivalent sampling according to the delay accuracy of the delay circuit, so as to ensure equivalent sampling at equal intervals.

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] In an exemplary embodiment of the present invention, an equivalent sampling device for automatic correction of delay is provided. figure 1 It is a structural schematic diagram of an eq...

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Abstract

The invention provides an equivalent sampling device for time-delay amount automatic correction. The equivalent sampling device is realized based on a programmable time-delay chip and a programmable logic gate array FPGA, wherein the time-delay amount automatic correction process comprises the steps of: utilizing the FPGA to measure the time-delay precision of the programmable time-delay chip in real time; and then according to the time-delay precision of a time-delay circuit, automatically adjusting the time-delay amount in equivalent sampling. In this way, the uniformly-spaced equivalent sampling is ensured, and the equivalent sampling device has the advantages that the circuit structure is simple, the measuring precision is high, the real-time correction capability is high, etc.

Description

technical field [0001] The invention relates to the technical field of radar in the electronics industry, in particular to an equivalent sampling device for automatically correcting the delay amount. Background technique [0002] Ultra-wideband radar refers to the radar detection technology whose working bandwidth is greater than 25% of the center frequency. It has a non-destructive detection technology with good resolution and penetration depth. Non-invasive detection and imaging of moving targets behind the wall, as well as detection of breathing signals of people buried under the ruins, has great potential in the fields of anti-terrorism, technical investigation, military, search and rescue, security inspection, medicine, and indoor precise positioning. Value. [0003] At present, the sampling of UWB signals mostly utilizes equivalent sampling technology. There are many methods to realize the time delay at equal intervals in the equivalent sampling, and the commonly use...

Claims

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Application Information

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IPC IPC(8): G05B19/042G01V3/12
CPCG01V3/12G05B19/042
Inventor 叶盛波夏正欢张群英陈洁阴和俊方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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