Circuit device of reducing energy consumption of sensor

Abstract

The invention discloses a circuit device of reducing the energy consumption of a sensor. The circuit device comprises a voltage stabilizing circuit (1) and a sensor power supply circuit (2), wherein the voltage stabilizing circuit consists of a power supply chip, a first capacitor and a second capacitor, and the sensor power supply circuit consists of a first transistor, a second transistor, a switching diode, a third capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor; the voltage input end of the voltage stabilizing circuit is connected with the anode of a battery, the voltage output end of the voltage stabilizing circuit is connected with the anode of a microprocessor and the input end of the sensor power supply circuit, and the output end of the sensor power supply circuit is connected with the power end of a sensor; when the circuit device operates, the sensor power supply circuit is conducted to operate when the sensor power supply circuit is controlled by the microprocessor and an MCU (Microprogrammed Control Unit) control level end is a high level, and the sensor power circuit is closed and the sensor stops operating when the MCU control level end is a zero level; by adopting a technical scheme of reducing the total energy consumption of the sensor by controlling the intermittent service and dormancy of the controller.

Description

technical field [0001] The invention relates to a circuit device, in particular to a circuit device for reducing sensor power consumption in an automatic control system. Background technique [0002] In an automatic control system, a sensor is usually used to detect the state of the controlled object. The sensor converts the detected physical quantity into an electrical signal and feeds it back to the MCU (microprocessor), and the MCU performs data processing on the feedback signal, including ADC conversion and discrimination. Output Control instructions, the control instructions control the controlled object through the executive agency; the work of the automatic control system is divided into working periods and standby periods, and the automatic control system of the equipment powered by AC power supplies continuous power regardless of the working period and standby period. Energy consumption; for equipment powered by batteries, such as automobiles, in order to reduce ene...

AI Technical Summary

Problems solved by technology

[0002] In an automatic control system, a sensor is usually used to detect the state of the controlled object. The sensor converts the detected physical quantity into an electrical signal and feeds it back to the MCU (microprocessor), and the MCU performs data processing on the feedback signal, including ADC conversion and discrimination. Output Control instructions, the control instructions control the controlled object through the executive agency; the work of the automatic control system is divided into working periods and standby periods, and the automatic control system of the equipment powered by AC power supplies continuous power regardless of the working period and standby period. Energy consumption; for equipment powered by batteries, such as automobiles, in order to reduce energy consumption and improve battery life, the automatic control system is in a dormant state during the standby period, and is awakened when processing is required; the vehicle-mounted automatic control system generally It needs to be woken up by a switch or a sensor, which prevents the sensor from sleeping; and the sensor requires a large working current. Even if the automatic control system sleeps, the energy consumption of the automatic control system is still very large, which is not conducive to extending the battery life.

For this reason, how to reduce the working energy consumption of the sensor has become the key to improving the endurance of the battery-powered system; Temperature sensors for oil temperature, water temperature, cabin air temperature, and engine body temperature. Many physical quantities change slowly and do not require sensors to continuously work and sample. It is only necessary to intermittently supply power to the sensors in different periods of time to start sampling; if these sensors do not need to work Sleep when needed, and wake up when it needs to work, so that the actual power consumption of these sensors can be reduced; however, in the prior art, there is no specific device for the intermittent operation of the sensor, so the existing technology has the problem of high energy consumption of the sensor. Problems and deficiencies

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