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Parking lot automatic guiding system based on position service and implementation method

A technology of location service and implementation method, which is applied in the direction of indicating various open spaces in the parking lot, the traffic control system of road vehicles, the traffic control system, etc., and can solve the problems of positioning accuracy and equipment complexity, etc.

Inactive Publication Date: 2014-07-30
江苏坤研电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been reports introducing the use of radio frequency identification technology, WIFI technology, etc. for indoor garage positioning services, but there are problems with positioning accuracy and equipment complexity

Method used

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  • Parking lot automatic guiding system based on position service and implementation method
  • Parking lot automatic guiding system based on position service and implementation method
  • Parking lot automatic guiding system based on position service and implementation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Both the reference transceiver and the vehicle-mounted transceiver described in the present invention can transmit and receive radio frequency and ultrasonic signals, so the positioning of the vehicle-mounted transceiver can be realized in two ways: up-sending and down-receiving working mode and down-sending and up-receiving type Way of working. Now take the sending and receiving work method as an example.

[0065] The number of on-board transceivers for sending and receiving works depends on the encoding method adopted by the system, and the encoding method can be determined according to the number of parking spaces in the parking lot.

[0066] The vehicle-mounted transceiver only emits positioning sound signals, and the data processing and positioning calculations are completed by the display processing device.

[0067] There are two types of links in the system: radio frequency links and acoustic links.

[0068] RF links exist between all nodes such as reference tr...

Embodiment 2

[0073] The system can choose a variety of signal encoding methods, and the Gold sequence is taken as an example to illustrate.

[0074] As a broadband pseudo-random noise signal, the Gold sequence has the optimal ambiguity function characteristic—the pushpin shape, that is, the optimal distance estimation accuracy and velocity estimation accuracy, and is independently determined by the signal bandwidth B and pulse width T, namely:

[0075] Distance resolution:

[0076] Velocity resolution:

[0077] As long as the frequency response (flat and broadband) of the ultrasonic transmitting transducer is acceptable, the distance resolution can be further improved by increasing the bandwidth of the transmitting signal. Speed ​​resolution is related to pulse width, the larger the pulse width, the higher the speed resolution. Both the bandwidth and the pulse width can be controlled independently. This parameter decoupling provides great flexibility for coding design.

[0078] The ...

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Abstract

The invention discloses a parking lot automatic guiding system based on the position service and an implementation method. The parking lot automatic guiding system comprises a reference transceiver fixed to the roof of an indoor parking lot, a vehicle-mounted transceiver arranged on a vehicle of a vehicle owner, and a display processing device, wherein the reference transceiver contacts with the vehicle-mounted transceiver through radio-frequency and ultrasonic signals. The reference transceiver and the vehicle-mounted transceiver transmit the signals to the display processing device, and then data processing is conducted so that the space three-dimensional coordinates of the vehicle where the vehicle-mounted transceiver is located can be solved and the target vehicle can be guided according to the space three-dimensional coordinates. The display processing device displays spare stall information of the parking lot in real time, dynamically issues parking space guiding and exit guiding information, and sends the displayed information to a smart phone of the vehicle owner. The parking lot automatic guiding system is based on the ultrasonic positioning mechanism and has the advantages of being accurate in positioning, low in cost, high in privacy, free of electromagnetic pollution, and the like.

Description

technical field [0001] The invention relates to a location service (LBS)-based parking lot automatic guidance system and an implementation method, belonging to the technical field of ultrasonic detection and positioning. Background technique [0002] With the increase in the number of private cars, the problem of difficult parking has gradually become prominent, especially in first-tier cities such as Beijing, Shanghai and Guangzhou. To deal with the parking problem, the original outdoor flat parking lot can no longer meet the requirements, and now we are mostly faced with large-scale three-dimensional parking garages on the ground or underground. This kind of large parking garage alleviates the difficulty of parking to a certain extent, but at the same time poses a challenge to drivers: how to quickly find a free parking space when parking in the face of a large three-dimensional garage, and how to quickly find your own car when picking up your car? [0003] The concept of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/14G08G1/123G08G1/0968
Inventor 李建
Owner 江苏坤研电子科技有限公司
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