Doppler velometer

A technology of Doppler speedometer and transceiver, which is applied in the direction of instruments, measuring devices, radio wave measuring systems, etc., can solve the problem that the absolute speed of a moving target cannot be detected, the speed cannot be calculated, and the speed measuring device cannot directly measure speeding vehicles actual speed etc.

Inactive Publication Date: 2014-03-26
SUZHOU FENGZHIHUO DIGITAL TECH
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  • Claims
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Problems solved by technology

[0002] The current velocimeters mainly include optical velocimeters and sonic velocimeters. Both of these two velocimeters are relative velocimeters, that is, they can only use the speed measuring head as a reference to detect the speed of the measured object relative to the probe head. The principle Yes: the probe continuously sends signals to the measured object, and the speed of the measured object relative to the probe can be calc

Method used

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Embodiment Construction

[0012] Below the present invention is further described:

[0013] The Doppler velocimeter includes a sonic transceiver, a frequency analyzer, and an arithmetic unit; during each measurement, the sonic transceiver sends two sonic signals to the measured target, and the second sonic signal is returned after the first sonic signal However, the time interval between the two sound wave signals should not be too long, so as to avoid excessive changes in the moving speed of the measured target and the speedometer. Generally, the second sound wave signal can be received within 0.5 seconds after the return signal of the first sound wave signal. sent within.

[0014] The frequency analyzer analyzes the frequency of the return signal corresponding to the two sound wave signals. In theory, the frequency of the return signal corresponding to the two sound wave signals is equal, because, in a short time, the speed of the measured target and the speed of the speedometer can be It is conside...

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Abstract

The invention provides a Doppler velometer. The Doppler velometer comprises a sound wave transceiver, a frequency analyzer and an arithmetic device. In each measuring process, the sound wave transceiver sends sound wave signals twice to a target to be measured, and the second-time sound wave signals are sent after the first-time sound wave signals are returned; the frequency analyzer analyzes the frequencies of the returned signals corresponding to the two-time sound wave signals; the arithmetic device calculates absolute velocity of the target to be measured according to the time interval for sending the sound wave signals twice, the round-trip time of the sound wave signals each time, and the frequencies of the returned signals corresponding to the sound wave signals at any one time. The Doppler velometer can measure the absolute velocity of the target to be measured in a moving state, so that the Doppler velometer is suitable for measurement in various conditions.

Description

technical field [0001] The invention relates to the field of electronic equipment, in particular to an electronic speedometer. Background technique [0002] The current velocimeters mainly include optical velocimeters and sonic velocimeters. Both of these two velocimeters are relative velocimeters, that is, they can only use the speed measuring head as a reference to detect the speed of the measured object relative to the probe head. The principle Yes: The probe continuously sends signals to the measured object, and the speed of the measured object relative to the probe can be calculated according to the round-trip time difference between the two signals and the propagation speed of the signal. However, the current speedometer cannot calculate Therefore, in some special cases, it cannot be used to detect the absolute speed of a moving target. For example, when a police car chases a speeding vehicle, the speed measuring device in the police car cannot directly measure the act...

Claims

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Application Information

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IPC IPC(8): G01S15/58
CPCG01S15/58
Inventor 薛瑜峰
Owner SUZHOU FENGZHIHUO DIGITAL TECH
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