Hotel ultrasonic interference detection system based on ultrasonic probe DSP interference US0012


Posted on Mar 28, 2007

Circuit constituted by the US0012 and P ultrasonic interference detection system is shown in Fig. When SEL40k termination high, select 40kHz clock frequency. P can use to compl


Hotel ultrasonic interference detection system based on ultrasonic probe DSP interference US0012
Click here to download the full size of the above Circuit.

ete the following tasks: first, to provide US0012 40kHz clock frequency; a second set US0012 sensitivity; third, receiving the alarm signal US0012 issued and perform the appropriate action by the controller. The 40kHz ultrasonic transmitter and receiver configuration sensor US0012 adaptation. The sensor is mounted on top of a column, you can increase the coverage area. When not connected to an external input amplifier effective detection distance of the vehicle interior up to 35m. C1 for the side of the capacitor CAP, choose to take the high-speed sensitivity when C1 270pF. C2 and C3 are power supply decoupling capacitors. Bias circuit preamplifier composed by C4 and R1. RX receiver to the end of the lead should adopt shielded cable, the shield connected RXGND end. To avoid strong interference is detected and damage the chip, if necessary, double limiter diode connected to the input pin, from the overvoltage protection effect.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Scope Probe
Ni-cad charger with current and voltage limiting
Efficient-switching-controller
Ac-line-voltage-announcer
TDA2050 Audio Amplifier
fluorescent lamp project
vhf rf preamp 100 175 mhz with max2633
Changing Fan Speeds
Infrared remote control receiver for Media Centers
Control circuit of automatic water
High-performance automatic water level controller circuit



Top