Sensor self-adaptive heating method

Abstract

The invention discloses a sensor self-adaptive heating method which is implemented to a heating system, the heating system comprises a controller, a heating device, a temperature sensor and a timer, and the sensor self-adaptive heating method comprises the following steps: S1, enabling the temperature sensor to detect the temperature T; s2, if the temperature T is higher than the heating thresholdT0, executing the step S3, and if the temperature T is lower than the heating threshold T0, executing the step S4; s3, entering a standby mode, and repeatedly executing the step S1; s4, entering a rapid heating mode, starting a heating device, and continuously heating; s5, judging whether the temperature T reaches the target temperature T1 or not, executing the step S6 if the temperature T does not reach the target temperature T1, and executing the step S7 if the temperature T reaches the target temperature T1; s6, continuously heating, and repeatedly executing the step S5; s7, entering a PWMself-adaptive heating mode, and periodically switching on and off the heating device in turn with a period of t0; and S8, maintaining the target temperature T1.

Description

technical field [0001] The invention relates to the field of electrochemical alcohol sensors, in particular to a sensor self-adaptive heating method. Background technique [0002] Drunk driving is one of the main causes of road traffic accidents. Exhaled alcohol content detection is an effective means for traffic police to prevent and control the phenomenon of drunk driving. Most of the currently used alcohol content measurement technologies are realized by using the principle of chemical reaction between the fuel cell type alcohol sensor and alcohol. Because the chemical reaction will be affected by temperature, and alcohol testing is mostly carried out outdoors, the breath alcohol content detector is greatly affected by temperature, and sometimes it cannot even complete the test. Current alcohol detectors generally use software to perform temperature compensation, but when the temperature is low, such as below -10°C, the response of the alcohol sensor becomes significant...

AI Technical Summary

Problems solved by technology

The disadvantages of this method of heating control are:

[0004] (1) The temperature sensor has a certain lag in sensing the temperature, and generally the distance between the closing threshold and the opening threshold of the heating is relatively large, resulting in a relatively large and unstable temperature change of the sensor, resulting in unstable operation of the temperature-sensitive sensor;

[0005] (2) There is no display of the heating progress, and the waiting process is long;

[0006] (3) The heating time is too concentrated, which will cause excessive power consumption due to heating in a certain period of time and damage the power supply

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