Reversing detection device
A detection device and resistance technology, applied in the direction of measurement device, radio wave measurement system, sound wave re-radiation, etc., can solve the problems of short range, unstable effect, and affecting the driving safety of special vehicles.
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[0018] For the aforementioned and other technical content, features and effects of the present invention, the following references are made in the appended Figure 1-2 It will be apparent from the detailed description of the embodiments. The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.
[0019] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
[0020] A reversing detection device, which is applied to the tail of a special vehicle. The signal receiving circuit includes an amplification filter and a subtractor. The amplification filter uses a resistor R1 to receive an ultrasonic signal detected by an ultrasonic sensor U1, and uses an inductor L1, a capacitor C1, The impedance matching circuit composed of capacitor C2 performs impedance matching on the ultrasonic signal to avoid loss due to impedance mismatch between the ultrasonic senso...
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