1、 Overview of intake pressure sensor
The air inlet pressure sensor is a sensor used to measure the pressure in the engine air inlet duct. It is a sensor that can convert the pressure signal into an electrical signal, and can convert the pressure change of the engine intake pipe into an electrical signal output, which can be provided to the ECU (electronic control unit) for processing. In this way, ECU can obtain the real-time information of engine air intake status, so as to achieve accurate control and optimization of the engine.
2、 Composition of air inlet pressure sensor
The main components of the air inlet pressure sensor include: pressure sensing elements, signal conversion circuits, wiring terminals, etc.
1. Pressure sensing element
The pressure sensor is the core component of the intake pressure sensor. It is a device that can directly measure the pressure in the intake pipe. Common pressure sensing elements include piezoelectric sensors EPM570T100C5N Micro pressure sensor, piezoresistive sensor, etc.
2. Signal conversion circuit
The signal conversion circuit is an important part of converting the pressure signal measured by the pressure sensor into electrical signal. It is usually composed of operational amplifier, resistor, capacitor, etc. In the conversion circuit, the operational amplifier plays the role of signal amplification and filtering, and the resistance and capacitance are used to adjust the impedance and frequency response of the circuit.
3. Terminal blocks
The terminal block is the connection part between the intake pressure sensor and other electronic components. It is usually made of metal materials, has certain heat resistance, corrosion resistance, high reliability, and can stably transmit signals to other electronic components.
3、 Operating principle of air inlet pressure sensor
The working principle of the air inlet pressure sensor is based on the physical principles such as piezoelectric effect, resistance effect or capacitance effect. Among them, piezoelectric sensor is the most common one, and its working principle is based on piezoelectric effect.
Piezoelectric effect refers to that in some crystal materials, when external pressure is applied, the crystal will produce non-uniform charge distribution, resulting in potential difference. Using this effect, piezoelectric sensor can convert the measured pressure signal into electrical signal.
In the intake pressure sensor, the piezoelectric sensor is usually composed of piezoelectric ceramic sheet, metal sheet and support rod. When the gas pressure in the engine intake pipe acts on the piezoelectric ceramic plate, the ceramic plate will produce tiny deformation, which will cause the bending deformation of the metal plate. This bending deformation will change the resistance value of the metal sheet, thus generating an electrical signal output. By amplifying and filtering the signal, an electrical signal related to the engine intake pressure can be obtained.
4、 Application of air inlet pressure sensor
The intake pressure sensor is a very important sensor, which is widely used in automobile, aircraft, robot and other fields.
1. Automotive
In the automotive field, the intake pressure sensor is mainly used in the engine control system. By measuring the pressure in the engine intake pipe, ECU can adjust the fuel injection amount, ignition period and other parameters in real time according to different working conditions, thus improving the combustion efficiency and power performance of the engine.
2. Aircraft field
In the aircraft field, the intake pressure sensor is mainly used to measure the pressure in the engine inlet. Since the air pressure in the air inlet will change greatly at different altitudes and speeds of the aircraft, it is necessary to measure the pressure of the air inlet in real time through the air inlet pressure sensor to ensure the normal operation of the engine and flight safety.
3. Robot field
In the robot field, the air inlet pressure sensor is mainly used for robot attitude control, force control and other aspects. By measuring the robot's attitude, force and other parameters, the inlet pressure sensor can provide real-time feedback signals, so as to achieve accurate control and optimization of the robot.
In a word, the intake pressure sensor is a very important sensor, which is widely used in various fields. By measuring the pressure in the engine air inlet pipe, the air inlet pressure sensor can provide real-time feedback signals, so as to achieve accurate control and optimization of engines, robots and other equipment.
