Sensing control method of wide-range pressure wave sensor

Abstract

The invention discloses a sensing control method of a wide-range pressure wave sensor. According to the method, a wide-range pressure wave sensor body, a signal converter, a data processor and a display are adopted; the pressure wave sensor is provided with a power supply input end and a signal output end; the input end of the signal converter is connected with the output end of the wide-range pressure wave sensor; the signal converter is used for acquiring a detection signal of the wide-range pressure wave sensor and converting the detection signal; the input end of the data processor is communicated with the output end of the signal converter; the output end of the data processor is electrically connected with the display; and the acquired converted detection signal is processed by the data processor and is displayed by the display. Sensing control over the wide-range pressure wave sensor can be achieved; and the pressure wave sensor has the advantages of being wide in frequency response, low in noise and high in low-sound-pressure measurement sensitivity and meanwhile has the advantage of wide-range linear detection.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a sensing control method for a wide range pressure wave sensor. Background technique [0002] The pressure wave sensor is a transducer (sensitive) element that uses the principle of capacitive coupling to detect pressure waves in the air. The pressure wave sensor generates a current signal output from the vertical vibration of the sensor caused by the pressure wave. It has high sensitivity and does not need to be zeroed. The sensor has certain anti-vibration interference performance. The sensitive unit will not change its long-term stability due to external influences (such as temperature, humidity, altitude, air pressure, time, etc.). The pressure wave sensor has the characteristics of small size, light weight, and easy installation and use. [0003] The pressure wave sensor is divided into three sections on the structural part, the front section is the front chamber, the middl...

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Problems solved by technology

[0005] 1. The existing capacitive pressure wave sensor has a large vibration displacement at high sound pressure, but in order to make the capacitor microphone have a large signal-to-noise ratio, the distance between the capacitors should not be too large, so at high sound pressure When the time displacement exceeds a certain proportion of its fixed distance, it will cause severe nonlinearity

[0006] 2. The pressure wave sensor is prone to zero point drift due to the influence of the environment. The zero point deviation of the same sensor in different regions is extremely large, sometimes exceeding ±10v. Even if it is manually zeroed, it can only be adjusted to about ±1v, and even if it works in the same place , the zero point changes every day due to changes in temperature, humidity, and atmospheric pressure

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