Ultrasonic stall information acquirer and ultrasonic stall information acquisition method

Abstract

The invention discloses an ultrasonic stall information acquirer which comprises a singlechip and an ultrasonic signal emitting / receiving circuit connected with the singlechip, wherein the ultrasonic signal emitting / receiving circuit comprises an ultrasonic receiving device, a voltage follower, a signal amplifier and two paths of comparing and shaping circuits which are connected in sequence; and the signal output end of each path of comparing and shaping circuit is respectively connected with one interruption port of the singlechip. By being matched with the corresponding ultrasonic stall information acquisition method, one set of ultrasonic emitting / receiving device can be used for realizing automatic range selection or automatic range switching or intelligent range setting according to a site actual demand by software aiming at stall design of an ultrasonic measurement interference factor or different ultrasonic ranges so that stall information acquisition tasks are completed. The ultrasonic stall information acquirer is especially suitable for a parking lot which is non-uniform in stall heights or inconsistent in stall ultrasonic measurement environments, and can also accurately, conveniently, rapidly and efficiently realize automatic setting of communication addresses of stall information acquirers when being matched with a specific communication address setting method.

Description

technical field [0001] The invention relates to automatic collection of vacant parking space information in a parking lot, and more specifically relates to an ultrasonic parking space information collector and an ultrasonic parking space information collection method. Background technique [0002] With the rapid increase of urban residents' car ownership, the contradiction between cars and parking spaces is becoming more and more prominent in crowded urban areas. If the number and location information of vacant parking spaces can be grasped in real time, it can help parking lot managers to use limited parking space resources more fully and efficiently. [0003] Most of the parking space information collectors disclosed in the technical literature now use ultrasonic transmitting / receiving kits, which use the principle of different times when ultrasonic waves are emitted and reflected back from obstacles when there are cars in the parking space and when there is no car in the ...

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Problems solved by technology

However, the inventors have found that most of the ultrasonic parking space information collectors disclosed in prior art documents use a pair of ultrasonic transmitters / receivers for measurement, the measurement range is fixed and single, and the range needs to be changed manually; / receiver, and configure a set of parameters for each pair of probes to achieve multi-range measurement. However, due to the use of two pairs of ultrasonic transmitters / receivers, two signal processing circuits are required, and the number of components is large and the cost is high. high

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