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Composite parking stall detection method and device based on Iilluminance and terrestrial magnetism combined detection

A composite vehicle and detection method technology, which is applied in traffic flow detection, indicating various open spaces in parking lots, and traffic control systems for road vehicles, etc.

Active Publication Date: 2017-07-07
程萌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence of these errors seriously affects the practical value of the detection technology
Taking the typical 95% accuracy rate as an example, there will be at least 10 misjudgments of 200 parking spaces at any time. Such a misjudgment rate will have a significant impact on parking guidance, parking billing, etc.

Method used

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  • Composite parking stall detection method and device based on Iilluminance and terrestrial magnetism combined detection
  • Composite parking stall detection method and device based on Iilluminance and terrestrial magnetism combined detection
  • Composite parking stall detection method and device based on Iilluminance and terrestrial magnetism combined detection

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Embodiment Construction

[0101] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0102] Such as figure 2 As shown, the illuminance sensor S1 and the magnetic field sensor S2 are connected to the processing unit P through analog signals or digital interfaces such as I2C, SPI, and UART.

[0103] Among them, S1 can be a logarithmic illuminance sensor or a linear illuminance sensor, its function is to convert the illuminance into an electrical signal, and its output can be an analog voltage or current signal or a digital interface signal such as I2C or SPI. In terms of specific implementation, a more common photoresistor or a dedicated ambient light sensor can be used, but not limited to. For example, Murata's LT-1PA01, TI's OPT3006\OPT3002\OPT3001, Silicon Labs' Si1153\Si1133, OSRAM's SFH3716\SFH5711\SFH3711\SFH3710\SFH3410, etc.

[0104] The function of the S2 magnetic field sensor is to convert the magnetic field strength...

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Abstract

The invention discloses a composite parking stall detection method and device based on Iilluminance and terrestrial magnetism combined detection. According to the method, detection is carried out by combining illuminance and terrestrial magnetism; the method comprises detection for vehicle driving-in and driving-away events; in detection for a vehicle driving-in event, if a magnetic field is changed, the illuminance is decreased, and the decreased illuminance reaches a threshold, it is determined that a vehicle drives into a parking stall; and in detection for a vehicle driving-away event, the vehicle which is driven away disturbs the magnetic field, and if the magnetic field is changed while the illuminance is increased, it is determined that the vehicle drives away from the parking stall. According to the invention, terrestrial magnetic field disturbing and ambient light shielding effects of the vehicle body are utilized at the same time, the problem that adjacent parking stalls may interfere each other in a traditional pure terrestrial magnetism detection technology can be overcome, and the detection accuracy is improved substantially.

Description

technical field [0001] The invention relates to a composite parking space detection device and detection method based on joint detection of illuminance and geomagnetism. [0002] Background of the invention [0003] Parking space detection, that is, real-time detection of the presence or absence of vehicles in parking spaces. This technology has broad application prospects in parking guidance, parking charging and many fields related to vehicle service. Generally speaking, indoor parking spaces usually use top-mounted ultrasonic, video and other methods. For outdoor parking spaces, the detection equipment cannot be installed on the ceiling, and the cost of cutting and wiring on the ground is high. Coupled with the limitations of complex natural factors such as wind, rain, snow, smog, sunshine, high temperature, and severe cold, pressure sensing, ultrasonic, video, laser, Many common detection technologies such as infrared, ground sensing, and radar are difficult to apply. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/04G08G1/042G08G1/14
CPCG08G1/04G08G1/042G08G1/14
Inventor 程萌
Owner 程萌
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