产品介绍
动态信号采集卡是一种专门设计用于捕捉和处理振动与噪声等信号的高性能数据采集设备。它通过多通道的高精度模数转换器,实时采集传感器所测得的动态信号,广泛应用于振动分析、噪声监测、结构健康监测、声学测试等领域。相比于标准信号采集卡,定制化动态信号采集卡能够根据具体应用需求进行优化,提供更高的灵活性和精确度,以满足特定行业的测试与分析要求
多通道输入
特点:定制化动态信号采集卡通常具有多个输入通道,支持同时采集来自多个传感器(如加速度计、麦克风、力传感器等)的信号
应用:这使得它特别适合用于需要同步捕捉多点振动和噪声数据的应用场景,如复杂机械系统的振动分析或建筑声学测试
采样率与分辨率
特点:为了捕捉高频动态信号,定制化动态信号采集卡通常支持高采样率(如100 kHz甚至更高)和高分辨率(如24位)的数据采集
应用:这能够确保信号的高保真度,有助于精确分析高频振动和细微噪声变化,适用于航空航天、汽车工业等对信号精度要求极高的领域
主要参数
ID | Description | Note | Electrical Requirements | Validation Result | |
HW | FW+HW | ||||
Output Channel Speaker Power | Shall provide ±0.2Vrms output voltage swing with 0.1dB accuracy within 20-20kHz to Knowles SR-32453-000 | The output from uplink board shall provide +/-0.2Vrms sinewave | >±0.2Vrms | >±1Vrms | >±1Vrms |
Shall provide ±0.2Vrms output voltage swing with 0.1dB accuracy within 20-20kHz to Knowles SR-32453-000 | Error = 20log(Vmeas/Vset) | <0.1dB | <0.05dB | <0.05dB | |
Frequency accuracy shall be ± 100ppm from 20-20kHz | Measure R10 frequency | <±100ppm | <100Hz:<200ppm>100Hz:<50ppm | <100ppm | |
THD+N value shall be < -60dB with a 0.1Vrms sine tone from 20Hz to 20kHz | sweep 20-20kHz R10 with 0.1Vrms, compare THD+N results with AP. –60dB (0.1%) since speaker doesn’t need to have low THD+N, that’s why shall contain a ref mic; current tester is 0.3% | <-60dB | <-80dB | <-80dB | |
Input channel-Mic Power | Shall accept 200mV peak to peak differential input range | Inject 200mV (simulating speaker) to the input, check output | >0.2Vrms | >1Vrms | >1Vrms |
Shall provide 0dB +/- 0.1dB bandpass filter gain within 20-20kHz from inputs to ADC | <0.1dB | <0.05dB | <0.05dB | ||
Shall have a THD+N lower than -104dB within 20-20kHz, with 0.1Vrms inputs | sweep 20-20kHz R10 with 0.1Vrms, compare THD+N results with AP. Analog microphone has a sensitivity of -38dBV and SNR of 66dB. This brings a noise level of -104dB. | <-104dB |
0.1Vrms:<-92dB 0.5Vrms:<-102dB |
0.1Vrms:<-92dB 0.5Vrms:<-102dB |
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LNA noise floor measurement — Enable the 26dB gain; Set input to -60dBV, 1kHz Measure signal Vrms | Error = 20log (Vmeas/ Vset) | <0.1dB | <0.05dB | <0.05dB | |
LNA noise floor measurement — Enable the 26dB gain; Short input P to N; Measure the noise floor | Measure the 20-20kHz noise power; Vnoise is calculated by root sum of the power | <10uV | <2uV | <2uV |