Intelligent temperature sensor
three big trend of the development of modern information technology is based on information collection,
The sensor technology)
, information transmission (
And information processing (
Sensor belongs to the forefront of cutting-edge information technology products, especially the temperature sensor is widely used in industrial and agricultural production, scientific research and life, and other fields, high quantity first of all kinds of sensors.
Over the past century, the development of the temperature sensor is roughly experienced the following three stages;
The traditional discrete temperature sensor (
Contain sensitive element)
Analog integrated temperature sensor/controller;
Intelligent temperature sensor.
At present, the international new type of temperature sensor is from analog to digital, from integration to develop in the direction of intelligent, networked integrated temperature sensor product category 1.
1 analog integrated temperature sensor integrated sensor is made using silicon semiconductor integrated process and, therefore also called silicon sensors or monolithic integrated temperature sensor.
Analog integrated temperature sensor is introduced in the 1980 s, it is will be integrated on a chip, temperature sensor can complete the function of temperature measurement and simulation signal output special IC.
The main characteristic of analog integrated temperature sensor is a single function (
Measuring temperature only)
, temperature measurement error is small, low prices, fast response speed, long transmission distance, small size, low-power, etc. , suitable for remote temperature measurement, temperature control, nonlinear calibration, don't need to do a simple peripheral circuits.
It is * is used widely at home and abroad, an integrated sensor, typical products are AD590, AD592, TMP17, LM135, etc.
2 analog integrated temperature controller analog integrated temperature controller mainly includes the temperature control switch, programmable temperature controller, the typical products are LM56, AD22105 and MAX6509.
Some enhanced integrated temperature controller (
For example, TC652/653)
Also contains A/D converter and cure good program, it has some similarities with intelligent temperature sensor.
But its own system, work is not controlled by microprocessor, this is the primary difference between the two.
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