Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module

A technology of a wireless transceiver module and a vehicle detector is applied in the field of vehicle detection, and can solve the problems of short effective working time of a single-point speed-measuring vehicle detector, large power consumption contributed by the wireless transceiver module, and short effective working time of the vehicle detector. , to achieve the effect of prolonging the effective working time, reducing power consumption and low power consumption

Active Publication Date: 2015-09-09
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetoresistive sensor has been in the mode of high-frequency power supply and sampling, and the power consumption will be very high, resulting in the low battery life of the vehicle inspection node, and finally resulting in a short effective working time of the single-point speed-measuring vehicle detector.
[0010] Therefore, in the single-point speed measuring wireless geomagnetic vehicle detector of the prior art, due to the short distance between the two magnetoresistive sensors, the conflict between power consumption and

Method used

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  • Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module
  • Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module
  • Vehicle detector, method for intermittent and variable-frequency power supply, and method for reducing power consumption of wireless transceiver module

Examples

Experimental program
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Example Embodiment

[0042] Example one

[0043] Such as figure 1 As shown, the embodiment of the present invention provides a wireless geomagnetic vehicle detector adopting an intermittent variable frequency power supply mode, which includes a battery power supply, a power management chip, a first power supply control circuit and a second power supply control circuit connected in parallel, and a micro A controller and a wireless transceiver module; the first power supply control line includes a first power supply control chip, a first magnetoresistive sensor, and a first ADC module connected in sequence, and the second power supply control line includes a second power supply control chip connected in sequence, A second magnetoresistive sensor and a second ADC module, the power manager is connected to the first magnetoresistive sensor through the first power supply control chip, the first ADC module is connected to the microcontroller, the The microcontroller is connected to the first power supply co...

Example Embodiment

[0061] Example two

[0062] Such as image 3 As shown, the embodiment of the present invention provides a method for intermittent variable frequency power supply of a vehicle detector, which includes the following steps:

[0063] S1, judging whether the first magnetoresistive sensor detects the signal of the arrival of the vehicle, if yes, go to S2, otherwise, use the first frequency intermittent power supply;

[0064] S2, using the second frequency for intermittent power supply, and the second frequency is higher than the first frequency;

[0065] S3, judge whether the second magnetoresistive sensor detects the signal of the vehicle arrival, if yes, go to S4, otherwise, find S6;

[0066] S4, judge whether the first magnetoresistive sensor or the second magnetoresistive sensor detects the signal of the vehicle leaving, if yes, go to S5, otherwise, go to S7;

[0067] S5, calculate and process bicycle information, and enter the next cycle;

[0068] S6: Judge whether the second magnetoresist...

Example Embodiment

[0074] Example three

[0075] Such as Figure 4 As shown, the embodiment of the present invention provides a method for wirelessly updating an MCU program of a vehicle detector, which includes the following steps:

[0076] A1, the roadside node wirelessly broadcasts a command for the MCU program to enter the update waiting state;

[0077] A2. After receiving the MCU program to enter the update waiting state, all vehicle inspection devices send a response to the drive test node, and at the same time, the MCU program enters the update waiting state;

[0078] A3. After the roadside node receives the responses sent by all the vehicle inspectors, it sends the MCU program update command to each vehicle inspector one by one according to the device serial number;

[0079] A4, each car inspector sets the application wireless update logo in Flash, and restarts the device.

[0080] The above method can facilitate the later maintenance of the vehicle inspection device, and can complete the update of...

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Abstract

The invention discloses a vehicle detector, a method for intermittent and variable-frequency power supply, and a method for reducing the power consumption of a wireless transceiver module, and relates to the technical field of vehicle detection. According to the vehicle detector provided by the invention, a microcontroller controls a power supply control chip through a power control pin to realize on-off and on-off frequency change of a magnetic resistance sensor and an ADC module and further realize intermittent and variable-frequency power supply to the magnetic resistance sensor. Thus, high-accuracy vehicle speed detection under high-frequency ADC sampling is ensured, and the situation in which waste of power is caused due to the adoption of high-frequency intermittent power supply when a vehicle has not arrived is avoided. According to the vehicle detector provided by an embodiment of the invention, the power consumption is reduced through intermittent power supply and variable-frequency power supply, and the accuracy of vehicle arrival detection signals is improved through variable-frequency power supply. In addition, by distributing the time length of timed data uploading to each vehicle detector, the power consumption of wireless transceiver modules is greatly reduced, and the battery life and the effective working time of the vehicle detectors are prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicle inspection, in particular to a vehicle inspection device, an intermittent frequency conversion power supply, and a method for reducing power consumption of a wireless transceiver module. Background technique [0002] Road vehicle detection technology is one of the key technologies of intelligent transportation. Through vehicle detection, real-time traffic flow information of a certain traffic section or a certain lane of the road can be obtained. [0003] At present, vehicle detectors (hereinafter referred to as "vehicle detectors") mainly include: toroidal coil vehicle detectors, video vehicle detectors, microwave vehicle detectors, geomagnetic vehicle detectors, etc. Among them, ring coil vehicle detectors are mostly used at urban traffic intersections, with high detection accuracy and good reliability, but installation and maintenance are more complicated; video vehicle detectors are greatly a...

Claims

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Application Information

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IPC IPC(8): G08G1/042H02J7/00
Inventor 陶圣王里李春里刘礼勇张为林海
Owner CHINA ACAD OF TRANSPORTATION SCI
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