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Classification of common sensors in automobiles

Sep. 16, 2019

Classification of common sensors in automobile shared by PDC Sensor supplier.

1. Vane type air flow meter vane type air flow meter by can swing around the axis of rotary wing (measurement) and potentiometer in two parts, the rotary wing piece installed inside the inlet channel, at the same time on the rotation of the rotary wing piece attached to a potentiometer, when measured as the change of the volume and rotates, its coaxial potentiometer resistance value changes, which will air traffic information is converted to electrical signals can be measured. According to its structure and detected object (gas flow rate)

2. The Carmen vortex air flowmeter is usually installed as an integral part of the air filter housing, and a cone-shaped vortex generator is set in the center of the air passage. When the air flows through the kammen vortex generator, the kammen vortex is generated. The magnitude of the air flow can be estimated by measuring the frequency of the kammen vortex. According to the different ways of eddy number detection, it can be divided into optical type and ultrasonic type. According to its structure and detected object (gas flow rate)

3. Hot line type air flow meter hotline (platinum) of the wire is part of the wheatstone bridge, bridge balance control, when there is air around through the hotline, the air cools the heater, temperature drop, the resistance is reduced, the bridge out of balance, for the balance of bridge restoration, control circuit will automatically increase the current hot wire, until the bridge back to balance, thus according to the change of the current to determine the size of the air flow, the air flow is converted to electrical signals can be measured. According to its structure and detected object (gas flow rate)

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PDC Sensor supplier

4. The thermal film air flowmeter is similar to the hot-wire type, and works with the wheatstone bridge. The difference is that the hot-film type does not use platinum hot wire, but the hot-wire resistor, compensation resistor and bridge resistor are made on the same ceramic substrate by thick film process. According to its structure and detected object (gas flow rate)

5. The function of the manifold pressure sensor is to detect the absolute pressure of the gas in the engine's intake pipe and convert the intake pressure into an electrical signal. According to its working principle, it can be divided into semiconductor piezoresistor type and vacuum film box type. According to its structure and detected object (gas pressure)

6. Engine oil pressure sensor which is used to detect the size of the engine oil pressure, its internal have a variable resistance, when the oil pressure increases, oil pressure through oil bending interface drive diaphragm, diaphragm move to push the moveable arm of a variable resistance to high resistance position, on the other hand, the oil pressure is reduced, arm moved to the location of low resistance to oil pressure can be converted into corresponding electrical signals. According to its structure and test object (liquid pressure)

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