Method for detecting vehicle speed by radar detector

A detector and vehicle speed technology, which is applied in the field of radar detector detection of vehicle speed, and can solve the problems of long detection time and reduced speed accuracy.

Inactive Publication Date: 2015-03-11
CHIEN CHENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing algorithm is to calculate the speed of the target vehicle by calculating the frequency difference between the target object and the two receivers. However, its disadvantage is that the detection of the side direction and the detection of the frequency difference require a long detection time, and in this long period of time, the target vehicle The radar cross section of the vehicle may have changed drastically within the detection range of the antenna, resulting in a significant loss of speed accuracy

Method used

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  • Method for detecting vehicle speed by radar detector
  • Method for detecting vehicle speed by radar detector
  • Method for detecting vehicle speed by radar detector

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Embodiment Construction

[0029] The present invention provides a method for detecting vehicle speed by a radar detector, which utilizes a structure of a transmitter and two receivers, or two transmitters and two receivers, to quickly calculate the vehicle speed of a target vehicle with the simplest formula.

[0030] figure 1 It is a schematic diagram of detecting vehicle speed in the present invention, including a transmitter 10 and two receivers 12a, 12b. The transmitter and receiver can be radars. The transmitter 10 is used to send multiple detection signals. When a target object enters the two receivers 12a, 12b detection area, the receivers 12a, 12b receive the reflected waves reflected by the target, wherein the distance from the center point of the two receivers 12a, 12b to the target is the first center distance, between the receivers 12a, 12b The distance of is the second distance. First calculate the phase angle difference of the reflected wave of the receiver 12a, 12b reflecting the target ...

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Abstract

The invention provides a method for detecting a vehicle speed by a radar detector, and the method comprises steps of using at least a transmitter to transmit a plurality of detection signals, when a target object enters into the detection zone of two receivers, and reflection waves of the detection signals are sensed, selecting distances between the target object and the receivers at two time points, and two phase angle differences between the target object and the receivers at two time points, and obtaining the speed of the target object by use of the distance between the two receivers and the wavelength of the transmitting wave.

Description

technical field [0001] The invention relates to a technology for detecting vehicle speed, in particular to a method for detecting vehicle speed by a radar detector which detects vehicle position and quickly calculates the vehicle speed. Background technique [0002] According to the general roadside radar vehicle detector, the vehicle speed detection radar is set up on the roadside to transmit and receive signals, and the detection is performed from the side of the vehicle. The principle is to use the radar to measure the distance between the target vehicle and the radar, the time difference between the vehicle entering and leaving the radar detection area, or the Doppler effect, and calculate the speed of the target vehicle. Its hardware can include a transmitter and a receiver, a transmitter and two receivers, or a combination of two transmitters and two receivers. [0003] Among them, in the detection method of a transmitter and a receiver, the receiver needs to perform ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/64G01S13/08
Inventor 曾明德
Owner CHIEN CHENG TECH
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