There's a lot of things we have to find and innovate, and now kids like to open up their favorite toy carts and put them together according to their own thinking. Some kids like to play with blocks, and they like to spell them into original patterns and so on. Then sound sensors may not have reached that point yet, but only those of us who have some knowledge of sound sensors. I'm going to introduce some of the finished sound sensors!
Sound sensors function as a microphone (microphone). It's used to receive sound waves and display vibrating images of sound. However, the intensity of noise cannot be measured。
Simple sensor circuits, microphones are a signal source and r1 provides a dc spot for microphone signals. After the c1 coupling, the role of r2 and rp is to reconcile the dcus of c1 to the high and low of the c1 signal so that the q1 conductor and comparison with the rear comparator, with the magnification of q1, the r3 provides a partial pressure for the magnifying tube, r4 r5 fixes a voltage for the two feet of the comparator, which is the reference level, 3 feet to the power level and 2 feet to the power level, 3 feet to the high level, and led does not light. Three feet low, low power level, led light
Rationale
The sensor contains an acoustic-sensitive electro-capacitator in polar microphones. Acoustic vibrations cause a change in the capacitor to produce a small voltage corresponding to the change. This voltage was subsequently converted to 0-5v voltage, accepted by the data collector through the a/d conversion and transmitted to the computer。
Specifications
Acoustic sensors show the size of the sound and can study the wave shape of the sound;
Staple 1 (suggested sound): 45-120 db;
Staple 2 (measured waveform): 0-5v (measured frequency range 100hz ~ 4,000hz)
Resolution: 1hz
Precision: ±1%
Use
The sensor does not need to be calibrated again and the software automatically adjusts to zero。
B. Sample frequency takes 10,000 times per second or more, otherwise the image cannot reflect the acoustic vibration in a real and accurate manner。
C. The vertical coordinates of the images represent the voltage values corresponding to the acoustic vibration。
D. Output sensors with 4-20 ma for access control systems, such as the zs series in sichuan
E. Pro- and negative signal output where cost limits exist, e. G., tz-2ka
I've basically introduced the principles of sound sensors, and i hope they'll better help you to think more widely about sound sensors. I didn't make sound sensors, but i know a little bit about its principles. That's why you can't tell you how! If your friends really want sound sensors, you're gonna have to pay more attention to the novel! Happy times are going so fast, it's over again
