Device for testing and calibration SENSORS SPL

摘要

The invention relates to measuring equipment, in particular to devices for testing and calibration of the sound pressure sensors mounted on the surface of the test machines subjected sound pressure with the working levels of 120 to 180 dB, and can be used in cramped conditions, for example, in engine compartments aircrafts without dismantling the probes.; The technical result in the achievement of which the claimed utility model is to increase the level of the test sound pressure at small dimensions of that part of the claimed device that is applied and pressed against the calibratable probe, convenient to use the compound of this part with the rest of the device in the regulation of the frequency range and amplitudes test signal.; The apparatus comprises a test signal generating unit (consisting of the source and the voltage regulator-converter, a sinusoidal signal generator and a power amplifier) ​​and the acoustic radiator, mechanically dissociated with structurally generation unit. As used miniature electromagnetic transducer phone coupled with wireline generating unit and supplemented sealing gasket. As a result, the output level of the emitter is not less than 140 dB, providing a significant increase of the efficiency of the acoustic phone (nominal value which amounts to 110-115 dB).; To maximize the intensity of the emitted sound (not less than 153 dB) of the test signal generator is used for setting the frequency of maximum resonance phone membrane. In addition, regulation of the oscillator frequency and the signal power amplifier device allows for frequencies from 150 to 2500 Hz with the levels 140-153 dB, which expands the range of calibrated sensors. To ensure long-term operation of the device it allows dual powered by the internal battery or an external power supply using a switch and transmitter-stabilizer type DC-DC voltage.; 2 z.p.f. 2 FIG.