Sensor signal processing circuit

Abstract

The invention discloses a sensor signal processing circuit, comprising a fixed resistor, a comparator and a singlechip, wherein one input end of the comparator is used for connecting with the output end of a sensor, and the output end of the comparator is connected with the singlechip; the sensor signal processing circuit also comprises a plurality of reference resistors and a single-pole multi-throw switch, the number of the selecting ends of the single-pole multi-throw switch is equal to the number of the reference resistors, one end of each of the reference resistors is connected to a power supply, the other end of each of the reference resistors is connected with the selecting ends of the single-pole multi-throw switch in a one-to-one correspondence manner, the common end of the single-pole multi-throw switch is respectively connected with the other input end of the comparator and one end of the fixed resistor, and the other end of the fixed resistor is connected to the ground. The sensor signal processing circuit is convenient to operate and is high in measurement precision.

Description

technical field [0001] The invention relates to a signal processing circuit. Background technique [0002] At present, there are many types of sensors, which can be used for different types of data sensing. After the sensor senses the data, it needs to undergo signal processing to obtain the required data. Existing sensor signal processing circuits such as figure 1 As shown, it includes a comparator, an adjustable resistor Rx, a fixed resistor R and a single-chip microcomputer. The output terminal of the sensor is connected to an input terminal of the comparator, one end of the adjustable resistor is connected to the power supply VCC, and the other end is grounded through a fixed resistor. The other input terminal of the comparator is connected between the adjustable resistor and the fixed resistor; the output terminal of the comparator is connected with the single chip microcomputer. When the sensor detects the corresponding data, it outputs the corresponding signal as ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the many types of sensors, the types of sensors are different, and the detected data are different, such as voltage data, temperature data, etc. When processing the sensing data of different types of sensors, the resistance value of the adjustable resistor is different. When replacing When connected to the sensor, it is very troublesome to adjust the resistance value of the adjustable resistor continuously, and it is difficult to accurately grasp the resistance value change of the adjustable resistor, thereby reducing the measurement accuracy, which needs to be improved

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