Vehicle liquid level warning and protection device

Abstract

The invention discloses a vehicle liquid level warning and protection device which belongs to the field of the electrics of the automobile body of an automobile. The device comprises a signal collection module, a voltage conversion module, a signal comparison module, a warning module, a protection control module and the like, wherein the signal collection module takes a pressure sensor as a measurement element and is installed at the bottom of a liquid container to be measured; a voltage signal output by the sensor is input into two voltage comparators which work independently, and the output ends of the two voltage comparators are respectively connected with the warning module and the protection control module; and the voltage conversion module converts an external power supply into voltage which is suitable for the device to work. Compared with a traditional liquid level protection device, the device provided by the invention uses the sensor to carry out measurement and has stable output and reliable measurement; and the device has a regulation function and can carry out regulation according to different liquid properties. When the measured liquid level exceeds a critical value, the device has two functions of warning and protection. Furthermore, the device can also be used for detecting liquid with poor insulativity and electric conductivity.

Description

technical field [0001] The invention belongs to the electrical field of automobile body, and in particular relates to a device which uses a liquid pressure sensor to measure the liquid pressure in a liquid container on a car, and then uses a voltage comparator to perform safety judgment, and can take alarm and protection measures when necessary. Background technique [0002] The existing similar liquid level detection devices are mainly realized by the conductivity of most liquids. A probe is set at a certain depth on the wall of a certain liquid storage tank. When the liquid level exceeds this position, the liquid submerges the probe, the liquid can make the current flow, and the relevant circuit is connected. At this time, The alarm circuit will not issue an alarm, but when the liquid level is lower than the probe position, the detection circuit is cut off, the alarm circuit is connected, and an alarm is issued. [0003] The advantages of this type of device are simple st...

AI Technical Summary

Problems solved by technology

However, this measurement method is too simple and rough, easily affected by changes in external conditions, and has poor reliability in work

And because the position of the probe is fixed, it cannot be adjusted

When the properties of the liquid to be detected or the probe itself changes, the system’s discrimination conditions cannot be corrected by adjustment, which will lead to the accuracy of the device’s work and even cause false alarms of the device

In addition, this type of device usually only has an alarm function and does not have a protection function. It can only serve as a reminder to the driver, but cannot further effectively protect the detected equipment, and has its limitations in function.

Furthermore, the above devices cannot be used to detect insulating or poorly conductive liquids

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