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A method to effectively eliminate safety hazards of automobile digital fuel gauges

A technology for safety hazards and automobiles, which is applied in the field of effectively eliminating the safety hazards of automobile digital oil meters, can solve problems such as differences, and achieve the effects of low false alarm rate of the system, sensitive system response, and quick action.

Inactive Publication Date: 2016-05-11
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic oil monitoring is mainly aimed at tank trucks, and the monitoring objects and monitoring points are different. They do not have the problem of directly installing the pressure sensor inside the fuel tank.

Method used

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  • A method to effectively eliminate safety hazards of automobile digital fuel gauges

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Embodiment Construction

[0014] A method to effectively eliminate safety hazards of automobile digital fuel gauges. First, 12V ~ 24V DC power supply is transmitted to the pressure sensor in the fuel tank through an anti-reverse diode D1 and then a P-channel MOSFET SI2303. After the transmitter, the output is a current signal of 4mA ~ 20mA; secondly, the MCU samples the output value of the pressure sensor every 10 milliseconds and conducts a comprehensive analysis on it. If the AD value is abnormal, the MCU will close the MOFET tube in time and send the alarm information Send off the driving computer; finally, the pressure sensor receives the power supply of the car through the P-channel MOSFET SI2303. The P-channel MOSFET SI2303 is driven by a totem pole composed of an NPN transistor and a PNP transistor. When the low level is turned on, there is a problem with the MCU or When the power is off, the MOSFET tube SI2303 can be turned off by itself; the AD sampling module includes a 150 ohm 1% precision me...

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Abstract

The invention relates to a method of effectively eliminating potential safety hazard of an automotive digital oil meter. The method comprises the following steps: firstly, the direct current of 12-24 V is supplied, after the direct current passes through an anti-transposition diode D1, the direct current is transmitted to a pressure sensor in an oil tank through a P-channel MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) tube SI2303, and a current signal of 4-20 mA is output after the pressure sensor passes through a transmitter; and secondly, output values of the pressure sensor are sampled at every 10 milliseconds by an MCU (Microprogrammed Control Unit) and are comprehensively analyzed, if an AD value is abnormal, the MOSFET tube is timely closed by the MCU, and meanwhile, the alarm information is transmitted to an automotive computer. According to the invention, the system has the advantages of high safety, sensitive response, rapid action and remarkable effect, and the system has very low false alarm rate due to adoption of a scientific filtering algorithm.

Description

technical field [0001] The invention relates to a method for effectively eliminating safety hazards of an automobile digital fuel gauge. Background technique [0002] With the development of automotive electronics technology, car digitalization has gradually become a trend and a major selling point for car sellers. The digital upgrade of cars has become the relentless pursuit of car manufacturers. Among them, the digitization of automobile fuel gauges has also achieved a lot of achievements. Most of them are completed by adding AD sampling module on the traditional oil float analog oil gauge. This method is not a real full digitalization, but a compromise solution. At present, the remote monitoring of automotive fuel on Yutong buses uses pressure sensors instead of traditional oil floats, and truly achieves full digitalization of fuel gauges. However, the pressure sensors are placed directly in the fuel tank of the car and directly contact the fuel. There is a great securi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/18H02H3/00H02H3/08
Inventor 赵忠彪张元敏耿跃峰罗书克
Owner XUCHANG UNIV