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A license plate anti-lost detection and alarm system

An alarm system and license plate technology, which is applied to vehicle parts, vehicle accessories for anti-theft, transportation and packaging, etc., can solve the problems of cumbersome license plate renewal procedures, loss, and difficulty in finding license plates lost.

Inactive Publication Date: 2017-02-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the car passes through the water-logged road, the front license plate is easily lost due to the impact of the water flow, and long-term driving will also loosen the license plate and cause loss. For car owners, the loss of the license plate is not easy to find, and the procedure for reissuing the license plate is cumbersome. The owner caused unnecessary trouble

Method used

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  • A license plate anti-lost detection and alarm system
  • A license plate anti-lost detection and alarm system
  • A license plate anti-lost detection and alarm system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see Figure 1 to Figure 7 , a license plate anti-lost detection and alarm system is characterized in that: it includes two eddy current proximity switch sensors 1 installed at the position of the license plate and simultaneously detects the state of the license plate, the proximity switch sensor 1 is connected to a signal conversion circuit 2, and the signal replacement circuit 2 is connected to a single-chip microcomputer control circuit 3, and the single-chip microcomputer control circuit 3 is connected to an indicator light display circuit 4 and an alarm circuit 5, thereby being connected to the display 6 and the alarm 7; the signals of the two proximity switch sensors 1 enter the signal conversion circuit 2, and then Entering the single-chip microcomputer control circuit 3, the single-chip microcomputer control circuit 3 drives the display circuit 4 and the alarm circuit 5 according to the set logic, thereby completing the display of the display 6 and the action of t...

Embodiment 2

[0025] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0026] Figure 7 Shown is a schematic diagram of the installation position of the eddy current proximity switch. The specifications and models of the two eddy current proximity switch sensors are LJ30A3-10-J / DZ, the detection distance is 10mm, and the working voltage is DC 5-36V. Two proximity switches are respectively installed on the left and right sides of the license plate, corresponding to Figure 7 at position A and position B in . The two-way proximity switch provides two-way sensor signals, which can ensure the reliability of the system and eliminate the influence of the abnormality of a single switch sensor. At the same time, the proximity switches are placed on the left and right edges of the license plate, so that the system can detect more abnormal information, such as the screw falling off on one side of the license plate, etc., which improves the system's ab...

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Abstract

The invention relates to a detecting and warning system for preventing a number plate from getting lost. The system adopts two ways of eddy current type proximity switch sensor signals to judge the state of the number plate, and comprises proximity switch sensors, a signal conversion circuit, a single-chip control circuit, an indicator light display circuit, a warning circuit, a displayer, a warner and a power supply circuit, wherein the signal conversion circuit is a voltage follower and triode driving circuit, and overcomes the defects of limited driving capacity and easy interference by signals in signals received from proximity switches; a single-chip processing chip is a single-chip AT89S52 with low cost, and satisfies all requirements of the system; a single LED and a single loudspeaker are adopted for the display circuit and the warning circuit respectively; and a 7805 chip is adopted for the power supply circuit, and converts a power supply of 12 V of a car into a power supply of 5 V needed by the system. The detecting and warning system for preventing the number plate from getting lost provides a path to protect an identity card of each car.

Description

technical field [0001] The invention relates to the field of signal detection, in particular to a license plate anti-lost detection and alarm system, which can be applied to the detection and alarm of automobile license plates. Background technique [0002] The vehicle number plate is the "identity card" of the vehicle and an important information to distinguish other motor vehicles. With the rapid increase in the number of cars, it also brings a series of problems. When the car passes through the water-logged road, the front license plate is easily lost due to the impact of the water flow, and long-term driving will also loosen the license plate and cause loss. For car owners, the loss of the license plate is not easy to find, and the procedure for reissuing the license plate is cumbersome. The owner caused unnecessary trouble. [0003] All current automobiles are basically zero to the anti-lost design of the license plate, so, from a more humane point of view, it is part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R25/30B60R25/10
CPCB60R25/1004B60R25/104B60R25/34
Inventor 王建国程华利肖前平张天淼马世伟费敏锐
Owner SHANGHAI UNIV
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