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研究了次声传感器的频率特性的分布情况,定量分析了次声传感器组成部件参数对幅频特性的影响。通过求解次声传感器前后腔内的次声波动态方程得到频率响应模型和截止周期误差模型,选取一批进气口、均压管和膜片相对误差在5%之内的部件,与体积相对误差控制在0.1%之内的前后腔体部件组装成32个次声传感器并对其进行校准实验,校准结果表明该批传感器的截止周期分布在540 s至610 s区间,根据截止周期误差模型计算的理论变化区间范围为530.6 s至614.9 s区间,二者的一致性验证了模型的有效性,为控制次声传感器截止周期一致性和传感器批量精细设计提供了理论指导。
The distribution of the frequency characteristics of the infrasound sensor is studied, and the influence of the components of the infrasound sensor on the amplitude-frequency characteristics is quantitatively analyzed. The frequency response model and the deadline error model were obtained by solving the infrasound dynamic equation in the front and rear of the infrasound sensor. A batch of components with the relative error of the air inlet port, the pressure equalizer and the diaphragm within 5% was selected and compared with the volume relative error control The front and rear cavity components within 0.1% were assembled into 32 infrasound sensors and calibrated. The calibration results showed that the deadline of the batch of sensors was distributed in the range of 540 s to 610 s. According to the theory of deadline period error model calculation The range of variation is from 530.6 s to 614.9 s. The consistency of the two models validates the validity of the model and provides theoretical guidance for controlling the cut-off period consistency of the infrasound sensor and the batch design of the sensor.