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Classification Of Transducer,How Many Types Of Transducer Are There

Classification Of Transducer,How Many Types Of Transducer Are There

September 14 , 2023 0

How The Transducer Is Composed

Transducer composition: generally by the sensitive element, conversion element and conversion circuit composed of three parts, sometimes with auxiliary power supply.

Sensitive element:

Directly feel the measurement, and the output and the measured into a definite relationship with a physical quantity of the components.

Conversion element:

The core element of the sensor, with the output of the sensitive element as input, the perceived non-electrical quantity is converted into an electrical signal output. The converter element itself can be used as a stand-alone transducer and is called an element transducer.

Transformer Circuit:

The relevant circuitry involved in converting the electrical signal output from the sensing element into a useful electrical signal for processing, control, recording and display.

Commonly used transducers

There are many types of sensors on the market today, including temperature transducer, humidity transducer, gas transducer, and so on.

Temperature sensing chip series for highly integrated digital-analog mixed-signal intelligent sensing chip, temperature sensing principle based on the semiconductor PN section temperature and bandgap voltage characteristics of the relationship between the small-signal amplification, analogue-to-digital conversion, digital calibration compensation, the output of the digital temperature, with high precision, consistency and good, long life, low power consumption, programmable and flexible configuration and other advantages.

　　Each chip has a unique 64-bit ID serial number and is fitted with calibration coefficients according to the temperature error characteristics before leaving the factory, and the compensation calculation is performed automatically inside the chip. In order to simplify the system application, the chip's ID search, temperature measurement data memory access, function configuration, etc. are based on the digital single bus protocol instructions, the host computer microprocessor only needs a GPIO port can be read and write access. Single-bus communication interface by sharing a data bus to achieve a low-cost multi-node sensing acquisition and networking solutions, transmission distance, support for the number of nodes, to facilitate spatially distributed sensing network. The chip has a built-in non-volatile EEPROM memory unit, which is used to save the chip ID number, high and low temperature alarm thresholds, temperature calibration correction values, and user-defined information, such as sensor node number and location information.

Sensor Classification

1、According to the use

Pressure-sensitive and force-sensitive sensors, position sensors, liquid level sensors, energy consumption sensors, speed sensors, acceleration sensors, radiation sensors, thermal sensors.

2、According to the principle

Vibration sensors, moisture-sensitive sensors, magnetic sensors, gas-sensitive sensors, vacuum sensors, biosensors and so on.

3、According to the output signal

Analogue sensors: the measured non-electrical quantities are converted into analogue electrical signals.

Digital sensor: the measured non-electrical quantities into digital output signals (including direct and indirect conversion).

Digital sensors: Convert measured signal quantities into frequency signals or short-period signal outputs (including direct or indirect conversion).

Switching sensor: When a measured signal reaches a specific threshold, the sensor outputs a set low or high level signal accordingly.

4, according to its manufacturing process

Integrated sensors are manufactured using standard process technology for producing silicon-based semiconductor integrated circuits. Usually also used for the initial processing of the measured signal part of the circuit is also integrated on the same chip. Thin-film sensors are formed by depositing a thin film of the corresponding sensitive material on a dielectric substrate (base plate). When using a hybrid process, part of the circuitry can also be manufactured on this substrate. Thick-film sensors are made by coating a ceramic substrate, usually made of Al2O3, with a paste of the corresponding material and then heat treating it to form the thick film. Ceramic sensors are produced using standard ceramic processes or some variant thereof (sol-gel, gel, etc.). After completion of the appropriate preparatory operations, the formed elements are sintered at high temperatures. There are many common characteristics between the two processes, thick film and ceramic sensors, and in some respects the thick film process can be considered a variant of the ceramic process. Each process technology has its own strengths and weaknesses. The use of ceramic and thick film sensors is more reasonable due to the lower capital investment required for research, development and production, as well as the high stability of the sensor parameters.

5, according to the measurement purpose

Physical sensor is the use of some of the physical properties of the substance being measured to change the characteristics of the made.

Chemical-type sensor is the use of chemical substances, concentration and other chemical quantities can be converted into electrical quantities made of sensitive components.

Biological sensors are sensors that use the characteristics of various organisms or biological substances to detect and identify the chemical composition of living organisms.

6, according to its composition

Basic sensor: a basic single conversion device.
Combination of sensors: is a combination of different individual conversion devices and the composition of the sensor.
Application-type sensors: basic sensors or combination-type sensors and other institutions combined with the composition of the sensor.

7, according to the form of action

According to the form of action can be divided into active and passive sensors.

Active sensors and the role of type and reaction type, such sensors on the object to be measured can send out a certain detection signal, detection of detection signals in the object to be measured in the changes, or by the detection of signals in the object to be measured to produce a certain effect of the formation of signals. Detecting changes in the detection signal is known as the role of the type, the detection of the response to the formation of the signal is known as the reaction type. Radar and radio frequency range detectors are examples of the action type, while photoacoustic effect analysers and laser analysers are examples of the reaction type.