地震儀由三個相同的傳感元件和一個測量裝置組成,傳感元件接收三個低頻機械振動，通過三個相互交叉的軸X，Y，Z并將它們轉(zhuǎn)換為模擬信號。同時，測量模塊對模擬信號進行數(shù)字處理，并通過CAN 2.0接口進一步傳輸處理后的數(shù)據(jù),CAN測量系統(tǒng)同步機制允許對ZET 7156-VER.1地震儀進行自動同步，精度可達10微秒。
數(shù)字短周期地震儀ZET 7156-VER.1應(yīng)用
數(shù)字短周期地震儀（檢波器）用于自動結(jié)構(gòu)健康監(jiān)測系統(tǒng)中，以及用于控制建筑物的自振頻率和相應(yīng)的對數(shù)阻尼衰減。ZET 7156-VER.1數(shù)字短周期地震儀也可用于泄漏控制系統(tǒng)中，用于區(qū)段振動控制監(jiān)測，以防止系統(tǒng)錯誤報警。
數(shù)字短周期地震儀ZET 7156-VER.1連接
數(shù)字短周期地震儀ZET 7156-VER.1在測量網(wǎng)絡(luò)中依次連接，由此產(chǎn)生的測量結(jié)構(gòu)通過ZET 7174接口轉(zhuǎn)換器（CAN）連接到PC↔ USB），ZET 7176（控制器局域網(wǎng)↔ 以太網(wǎng)或Wi-Fi）。測量網(wǎng)絡(luò)還可以補充GSM ZET 7177數(shù)字數(shù)據(jù)傳輸模塊（can↔ GSM）如果以太網(wǎng)連接不可用或需要建立無線備份數(shù)據(jù)傳輸通道。
數(shù)字短周期地震儀ZET 7156-VER.1規(guī)格參數(shù)
| Metrological specifications | |
|---|---|
| Measured physical value | vibration velocity |
| Number of axes | 3 (X, Y, Z) |
| Frequency range | from 0,05 up to 100 Hz |
| Output values | instant |
| Measurement range | from 0,0015 up to 50 mm/s |
| Measurements error | 10 % |
| Intinsic noise level for: vibration velocity vibration acceleration vibration displacement | max. 05 μm/s max. 6 μm/s2 max. 0.2 μm |
| Real-time perfomance monitoring | synchronization quality, data quality |
| Measurement reliability control | sensing element integrity control, measurement circuit control |
| Technical specifications | |
| Data refresh rate | 50, 100, 200, 500, 1000 Hz |
| Amplification ratio | 1, 8, 128 |
| Sensor type | integrated sensing element |
| Data transfer interface | CAN 2.0 |
| Exchange speed | 100, 300, 1000 kbps |
| Operational specifications | |
| Dimensions | 110×70,5×70,5 mm |
| Dimenions of the mounting plate | 129×70,5×3 mm |
| Weight | 500 g |
| Device power | from 9 up to 24 V |
| Consumed power | 0,5 W |
| Operating temperature range for industrial version/ for explosion-proof version | from -40 up to +60 °C from -60 up to +85 °C |
| Electromagnetic compatibility EMC | |
| IEC 61000-4-2, ESD | contact 4 kV, air 8 kV |
| IEC 61000-4-4, EFT | power supply 0,5 kV, signal 0,25 kV |
| IEC 61000-4-5, Surge | 500 V |
* Increase of amplification ratio leads to a proportional reduction of the digital seismometer’s measurement range
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