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LDTM-028K データシート(PDF) 2 Page - List of Unclassifed Manufacturers |
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LDTM-028K データシート(HTML) 2 Page - List of Unclassifed Manufacturers |
2 / 5 page LDT with Crimps Vibration Sensor/Switch LDT0-028K Piezo Vibration Rev 1 www.meas-spec.com 10/13/2008 2 of 4 examples of properties Four different experiments serve to illustrate the various properties of this simple but versatile component. Experiment #1 LDT0 as Vibration Sensor - with the crimped contacts pushed through a printed-circuit board, the LDT0 was soldered carefully in place to anchor the sensor. A charge amplifier was used to detect the output signal as vibration from a shaker table was applied (using a charge amplifier allows a very long measurement time constant and thus allows the "open-circuit" voltage response to be calculated). Small masses (approximately 0.26g increments) were then added to the tip of the sensor, and the measurement repeated. Results are shown in Table 1 and the overlaid plots in Fig. 1. Without adding mass, the LDT0 shows a resonance around 180 Hz. Adding mass to the tip reduces the resonance frequency and increases "baseline" sensitivity. TABLE 1: LDT0 as Vibration Sensor (see Fig 1) Added Mass Baseline Sensitivity Sensitivity at Resonance Resonant Frequency +3 Db Frequency 0 50 mV/g 1.4 V/g 180 Hz 90 Hz 1 200 mV/g 4 V/g 90 Hz 45 Hz 2 400 mV/g 8 V/g 60 Hz 30 Hz 3 800 mV/g 16 V/g 40 Hz 20 Hz Experiment #2 LDT0 as Flexible Switch - using a charge amplifier to obtain "open-circuit" voltage sensitivity, the output was measured for controlled tip deflections applied to the sensor (supported by its crimped contacts as described above). 2 mm deflection was sufficient to generate about 7 V. Voltages above 70V could be generated by bending the tip of the sensor through 90° (see Table 2, Fig. 2). |
同様の部品番号 - LDTM-028K |
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同様の説明 - LDTM-028K |
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