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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 detection accuracy is particularly prominent.
[0011] In addition, the vehicle detector sends the detected vehicle information to the drive test center node through the wireless transceiver module. During a certain period of time, the wireless transceiver module has been in the working mode of transmitting data, resulting in a large power consumption contributed by the wireless transceiver module. , which in turn leads to low battery life of the vehicle detector, and ultimately leads to a short effective working time of the vehicle detector

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

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Embodiment 1

[0043] Such as figure 1 As shown, the embodiment of the utility model provides a wireless geomagnetic vehicle detector adopting intermittent frequency conversion power supply mode, including battery power supply, power management chip, parallel first power supply control circuit and second power supply control circuit, micro A controller and a wireless transceiver module; the first power supply control circuit includes a first power supply control chip, a first magnetoresistive sensor, and a first ADC module that are connected in sequence, and the second power supply control circuit includes a second power supply control chip that is 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 control chip through the first pow...

Embodiment 2

[0062] Such as image 3 As shown, the embodiment of the present invention provides a method for intermittent frequency conversion power supply of a vehicle inspection device, including the following steps:

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

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

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

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

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

[0068] S6, judging...

Embodiment 3

[0075] Such as Figure 4 As shown, the embodiment of the present invention provides a method for wirelessly updating the MCU program of the vehicle inspection device, including the following steps:

[0076] A1, the roadside node wirelessly broadcasts the command that the MCU program enters the update waiting state;

[0077] A2. After receiving the command that the MCU program enters the update waiting state, all vehicle detectors 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 detectors, it sends the MCU program update command to each vehicle detector one by one according to the device serial number;

[0079] A4, each vehicle detector sets the application wireless update flag in Flash, and restarts the device.

[0080] Adoption of the above method can facilitate the post-maintenance of the vehicle detector, and can complete the up...

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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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