Distance detection system and method

A technology of distance detection and distance, which is applied in the field of distance detection system, can solve the problems of variable threshold detection method with high signal-to-noise ratio, narrow measurement distance range, and easy to be interfered, and achieve low signal-to-noise ratio requirements, easy to implement, The effect of high measurement accuracy

Inactive Publication Date: 2018-11-30
成都国恒空间技术工程股份有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a novel distance detection method, to solve the problem of poor measurement accuracy of the cross-correlation function method in the time-of-flight detection method and the signal-to-noise ratio of the variable threshold detection method in the current distance measurement system. High requirements, susceptible to interference, and the phase difference method will have problems such as narrow measurement distance range

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Embodiment 1

[0023] The distance test is carried out in the air, the air temperature is 25°C, the signal emitted by the emission source is a sound wave, and the frequency point change rate of the emission source is △f=2*10 5 Hz / s, initial frequency f 0 =1*10 6 Hz.

[0024] The transmitted signal enters the antenna (4) for transmission through the amplifier (2) and the circulator (3), and the signal is received by the antenna (4) after being reflected by an object, and enters the signal processing module through the circulator (3). The signal processing module receives and stores the signal emitted by the emission source amplified by the amplifier (2) in real time.

[0025] Such as figure 2 As shown, the signal processing module receives the data RD reflected by the measured object, and extracts the data SD sent by the emission source at this time. After performing FFT processing on the two columns of data, the maximum value of the two spectra can be found, which are Reflected data fre...

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Abstract

The invention relates to a distance detection system and method. The distance detection system is characterized in that the distance detection system comprises a signal processing module, a transmitting source, an amplifier, a loop device and an antenna; the transmitting source is connected to the input end of the amplifier, the signal processing module and the loop device are connected to the output end of the amplifier, the loop device and the antenna are connected with each other, and the output end of the loop device is further connected to the signal processing module; and the transmitting source is used for transmitting signals of variable frequency. The distance detection system and method have the advantage that the distance detection system and method solve the problems that in anexisting ranging system, a cross-correlation function method in a flight time detection method has poor measurement accuracy, a variable threshold detection method has high signal-to-noise ratio andis prone to being interfered, and a phase difference method can have a narrow measurement range.

Description

technical field [0001] The invention relates to the field of distance detection, in particular to a distance detection system and method. Background technique [0002] In the past two decades, the non-contact distance measurement method has made great progress along with the development of electronic technology, such as laser, microwave radar, infrared and ultrasonic distance measurement methods have appeared successively. Among them, the operation of laser ranging is relatively simple, and the measurement accuracy is high, but it is greatly affected by the environment, the cost is relatively high, and the later maintenance is very inconvenient, so it is generally used in the military field. Microwave radar ranging technology is mostly used in military and industrial fields, and uses circuit modules such as oscillators. The advantages of infrared ranging are low cost, good directionality, and accurate positioning. The disadvantage is that it is affected by light and has poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08
CPCG01S15/08
Inventor 刘亿亮王丽张远芳
Owner 成都国恒空间技术工程股份有限公司
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