A multi-factor method for judging whether a parking space is covered by a car

Abstract

The present invention provides a multi-factor method for judging whether a parking space is covered by a car, comprising: installing a deformable vehicle detection device on each parking space, the deformable vehicle detection device is integrated with an oscillating circuit inductance coil, a detection unit, The control unit, the communication unit, and the detection unit detect the change of the oscillation frequency of the inductance coil of the oscillating circuit. The control unit preliminarily judges whether there is a vehicle entering or exiting the parking space according to the change of the oscillation frequency, and then controls the deformable vehicle detection device to deform, and After the deformable vehicle detection device is deformed, it is determined whether a vehicle enters or exits the parking space according to the further change of the oscillation frequency. The present invention finally judges whether there is a vehicle entering or leaving the parking space by detecting the change of the oscillation frequency in the inductance coil and judging twice before and after the change of the oscillation frequency, which improves the accuracy of judging whether there is a car covering the parking space, and can be deformed at the same time The variant of the vehicle detection device also has a vehicle blocking function.

Description

technical field [0001] The invention relates to the technical field of parking space detection, in particular to a multi-factor method for judging whether a parking space is covered by a car. Background technique [0002] The core of the intelligent parking space management system is the parking space sensor technology. The most commonly used parking space sensors in China include ground coil sensors, geomagnetic sensors, video sensors, microwave sensors, ultrasonic sensors, infrared sensors, etc., which can meet the detection requirements of parking spaces in different environments. In static intelligent transportation applications represented by parking lots, due to the large demand for parking sensors, there are special requirements for low cost, good installability, and good maintainability. [0003] The ground induction coil parking sensor is a vehicle sensor based on the principle of electromagnetic induction. It usually embeds the loop coil under the road or parking...

AI Technical Summary

Problems solved by technology

Although this detection method for judging whether a parking space is covered by a car is relatively mature, in practical applications, because the frequency of no cars changes with the environment (such as temperature, humidity, etc.), it often leads to misjudgment. Correct the range values ​​of the two frequencies, the frequency of vehicles and the frequency of no vehicles, according to environmental changes, otherwise it will affect the accuracy of judgment

[0004] Application number 2014100069810 discloses a ground induction coil sensor and a method for quickly detecting parking spaces by using it. This patent uses a frequency and phase detector operating in an open-loop mode to detect changes in frequency. The time required is only Tens of milliseconds, greatly prolonging the working time and power consumption under the condition of battery power supply, but its disadvantage is that it still needs to continuously fine-tune the threshold frequency of whether there is a car or not, and the accuracy of parking space judgment is difficult to guarantee

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