At present, sensors are developing towards integration and intelligence. New sensor technologies are developed by researching new materials and processes, and each new material and principle can lead to the generation of new sensor categories.

Most of the sensors developed today are physical sensors, and the future research direction should be towards chemical sensors and biosensors.In particular, the development of intelligent robot technology needs to develop all kinds of sensory sensors that imitate human, such as existing robot taste, touch and force sensors.

Smart sensor is a kind of sensor with microprocessing, which can realize the functions of detection, judgment and information processing.It is a sensor with the ability of judgment and learning, and has the following characteristics.

> has stable and reliable performance: it can store, judge and calibrate data.

2 > high precision: intelligent sensor has the function of information processing can be performed, so you can through the software for all kinds of deterministic system error modification (such as: input and output nonlinear error of sensors, zero error, temperature error, etc.), also can reduce the noise, the appropriate compensation error, make the precision of the sensor is greatly increased.

3. > detection is convenient: it has the ability of programmable automation to change according to the detected object or condition, thus changing the range and the form of output data.

4> high cost performance: compared with the multi-function and single-function sensor, in the form of a precision, the cost performance will be higher, especially after the use of cheap MCU will be more obvious.