Method for eliminating interference of sensor and outside thereof

Abstract

The invention belongs to the automatic test field, in particular to a method for eliminating of a sensor and outside thereof. The solved technical problem is to provide a method for eliminating sensor performance change and outside interference according to the current quantity and variable quantity of sensor output and through several judgment rules and special arithmetic processing. The method comprises the following steps that: 1 the base value B of the sensor output is confirmed, which reflects the output of a sensor when quantity to be measured is zero, 2 the current output value V of the sensor output is read out, and 3 the actual value R of the sensor output is calculated, if the interference, that is the sensor performance change and the outside interference, only influences the zero point of the sensor output, R=V-B is adopted to calculate and if the interference influences the sensitivity of the sensor, the R=(V-B) / B is adopted to calculate. The invention can solve the false judgment problem of the sensor well.

Description

technical field [0001] The invention belongs to the field of automatic testing, and in particular relates to a method for eliminating the sensor itself and external interference. Background technique [0002] Sensors that are usually used to detect slowly changing analog quantities generally directly reflect the measured value based on the sensor output signal (voltage or current); however, in actual use, the sensor will be affected by various external factors, such as: Smoke and fire alarms have been working for many years, and its sensors will inevitably be polluted by dust in the air. It is inevitable that false alarms or non-reports will be embarrassing with conventional detection and processing. In production, there are also performance differences between multiple sensors, and it is a very labor-intensive task to debug and calibrate them separately. The performance of the same sensor will change over time, so it is difficult to reflect the real situation, the original...

AI Technical Summary

Problems solved by technology

[0002] Sensors that are usually used to detect slowly changing analog quantities generally directly reflect the measured value based on the sensor output signal (voltage or current); however, in actual use, the sensor will be affected by various external factors, such as: Smoke and fire alarms have been working for many years, and its sensors will inevitably be polluted by dust in the air. It is inevitable that false alarms or non-reports will be embarrassing with conventional detection and processing.

In production, there are performance differences between multiple sensors, and it is a labor-intensive task to debug and calibrate them separately.

The performance of the same sensor will change over time, so it is difficult to reflect the real situation, the original meaning of the sensor is lost, and sensor false alarms may occur, which may cause various inconveniences in production and life.

Images