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Encryption sensor of taxi meter

A technology of sensors and taximeters, applied in the field of taxi pricing, can solve problems such as loopholes in electronic taximeters, reducing the accuracy and security of taximeter billing

Inactive Publication Date: 2015-01-28
SHAANXI YUHANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Taximeters now generally use electronic sensors. The sensor first receives the running information of the car, and then sends it to the taximeter. The taximeter automatically calculates and displays the mileage and fare; , the electronic sensor is used to monitor the running status of the taxi, and the sensor sends a pulse that meets the requirements to the meter when the car travels a certain distance, and the microcomputer control part counts the pulses sent by the sensor, and then converts them into mileage and fare for display Partially displayed, the function key is used to complete functions such as setting time, date and historical records of the meter. From the principle of the electronic meter, it can be seen that as long as the pulse that meets the requirements is sent to the meter, the meter will charge. Different meter has different requirements for the pulse, and the differences include positive and negative pulses, pulse width and level type. It is not difficult to simulate and realize the pulse that meets the requirements of the meter in the existing technology, which makes the electronic meter have loopholes and reduces the accuracy and security of meter billing

Method used

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  • Encryption sensor of taxi meter

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Embodiment Construction

[0015] An encrypted sensor for a taximeter, the encrypted sensor is composed of an encryptor, a decryptor, a password writer, an input circuit and an output circuit; wherein the input circuit, the encryptor, the decoder and the output circuit are connected in sequence, Encrypted writers connect to decoders. Wherein, the encryptor adopts PIC12C508A single-chip microcomputer, and the core component is 12C508A. Preferably, the decryptor adopts a PIC12CE518A single-chip microcomputer, which is composed of a photoelectric isolation part, a 12CE518A single-chip microcomputer and a counting pulse output circuit. The password writer adopts the INTER8031 single-chip microcomputer, and the input circuit and the output circuit are both counting pulses.

[0016] The encryptor receives the pulse signal, and after detecting this change, it sends out a password to the decoder. Each encryptor has a fixed password stored in the program memory; the password writer is designed to modify the dec...

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PUM

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Abstract

The invention relates to the field of taxi metering, in particular to an encryption sensor of a taxi meter. The encryption sensor is composed of an encryption device, a decryption device, a password writing device, an input circuit and an output circuit, wherein the input circuit, the encryption device, the decryption device and the output circuit are sequentially connected, and the password writing device is connected to the decryption device. According to the encryption sensor, the encryption device sends a password to the decryption device, decryption device sends a count pulse to the meter only when the password of the encryption device is identical to that of the decryption device, and then the meter charges. An OTP (One Time Programmable) microcontroller is used, a program cannot be changed after the program is burn, and a special password writing device is the must for modifying the password of the decryption device, so that the encryption sensor improves the reliability of the billing of the meter.

Description

technical field [0001] The invention relates to the field of taxi pricing, in particular to an encrypted sensor of a taxi meter. Background technique [0002] Taximeters now generally use electronic sensors. The sensor first receives the running information of the car, and then sends it to the taximeter. The taximeter automatically calculates and displays the mileage and fare; , the electronic sensor is used to monitor the running status of the taxi, and the sensor sends a pulse that meets the requirements to the meter when the car travels a certain distance, and the microcomputer control part counts the pulses sent by the sensor, and then converts them into mileage and fare for display Partially displayed, the function key is used to complete functions such as setting time, date and historical records of the meter. From the principle of the electronic meter, it can be seen that as long as the pulse that meets the requirements is sent to the meter, the meter will charge. Di...

Claims

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Application Information

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IPC IPC(8): G07B13/02
Inventor 郝青
Owner SHAANXI YUHANG ELECTRONICS