Voltage stabilizing display in tyre pressure monitoring system

Abstract

The invention discloses a voltage stabilizing display in a tyre pressure monitoring system. The voltage stabilizing display comprises a display circuit and a voltage stabilizing circuit, wherein the inlet end of the voltage stabilizing circuit is connected with a power supply; the outlet end of the voltage stabilizing circuit is connected with a power supply inlet end of the display circuit; the voltage stabilizing circuit comprises a voltage stabilizing chip U3, a reversed-connection-resisting diode V2, a voltage stabilizing inductor L1 and a voltage stabilizing capacitor C1; a voltage input opening of the voltage stabilizing chip U3 is connected with a cathode of the reversed-connection-resisting diode V2; an anode of the reversed-connection-resisting diode is connected with an input power supply; a voltage output opening of the voltage stabilizing chip U3 is connected with the voltage stabilizing inductor L1, and then is connected with the power supply inlet end of the display circuit; a feedback opening of the voltage stabilizing chip U3 is connected with an anode of the voltage stabilizing capacitor C1; and a cathode of the voltage stabilizing capacitor C1 is grounded. The voltage stabilizing display in the tyre pressure monitoring system has the advantages of simple circuit structure, good voltage stabilization effect, stability in work, strong adaptive capability and convenience in popularization and application.

Description

technical field [0001] The invention relates to a display, in particular to a pressure stabilizing display in a tire pressure monitoring system, and belongs to the technical field of TPMS. Background technique [0002] Tire pressure monitoring, also known as TPMS, is a real-time monitoring of the air pressure and temperature of automobile tires, displaying tire pressure and temperature values, allowing car owners to keep track of tire pressure and temperature conditions, timely discovering tire leaks, insufficient air pressure, and excessive air pressure, etc., to avoid A traffic accident caused by a blown tire. The tire pressure monitoring system includes a tire pressure sensor and a display. The tire pressure sensor monitors the air pressure of the car tires and transmits the air pressure to the display for display, thereby realizing the monitoring of the air pressure in the car tires. The display for tire pressure monitoring is usually set in the cab of the car, and the ...

AI Technical Summary

Problems solved by technology

The display for tire pressure monitoring is usually set in the cab of the car, and the display is powered by a DC power supply. However, a small-scale digital chip is used in the display, and most small-scale digital chips (74 series) use a +5 volt DC power supply, and require The power supply value is between +4.5~+5.5 volts. If the power supply voltage exceeds this range, the logic of the digital chip will be abnormal. However, it is difficult for the voltage regulator chip of the current display to have a wide range of voltage input. If the voltage input If it is too high, it will cause the voltage regulator chip to overheat and make the voltage unstable. If there is an instantaneous large pulse, it will also cause damage to the voltage regulator chip and affect the work of the display. In severe cases, it will directly cause damage to the display.

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