REU610 Transmit and receive in one, easy to install
The object to be measured is equivalent to a reflector and needs to be aligned
The dual output model has a window output function for foreground and background suppression
The switching frequency is low, below 10Hz, which is suitable for detecting objects with slow running speed
Beam type ultrasonic sensor/mode of operation

The beam type sensor is divided into the transmitting end and the receiving end. When the sensor works, the ultrasonic wave emitted by the transmitting end will be received by the receiving end. When an object is near, the ultrasonic wave emitted by the transmitting end will be blocked, and the receiving eREU610 nd will output a response signal.

Beam type ultrasonic sensor/features

Transmit and receive separately installed
Acoustic sensitive materials or objects with tilted surfaces can be detected
The dual output model has a window output function for foreground and background suppression
No detection blind area, high switching frequency, up to 100Hz, suitable for detecting fast-moving objects
Mirror reflecting ultrasonic sensor/mode of operation

The mirror-reflecting sensor needs to be installed on the opposite side of the reflector, through which the ultrasonic signal is returned for detection. When an object blocks the reflector, the sensor will output a response signal.

Mirror reflective ultrasonic sensor/features

No specific reflector, metal plate/plastic plate or wall backREU610 ground is available
It can detect material or surface tilt that is sensitive to sound waves
The switching frequency is low, below 10Hz, which is suitable for detecting objects that run at a slower speed
There is no blind area (but the reflector has), and the blind area is generally less than 10% of the detection distance
How to calculate the detection distance of ultrasonic sensor

Ultrasonic sensors operate in the atmosphere and detect all ultrasonic reflected objects. The ultrasonic sensor periodically sends sound pulses, and the pulses reflected by the object are calculated inside the sensor. So how does the sensor calculate the detected distance?

Calculation formula: Distance L=t*c/2

t represents the time from sending ultrasonic waves to being returned to receiving, and c represents the propagation speed of ultrasonic waves when the ambient temperature is 20 ° C (i.e. 340m/s).

Measuring range and blind area

Ultrasonic sensor has a certain measuring range and blind area, the measuring range is divided into the nearest measuring point and the farthest measuring point, the nearest measuring point is determined by the blind area. So how do blind spots arise?

Ultrasonic sensor is an alternating working mode from one to another, when the ultrasonic pulse does not immediately stop vibration, but needs to go through a specific time to stop vibration, so it can not immediately receive the echo, this delay is equivalent to a blind area. The sensor can not detect the object stably in the blind zone, so in actual use, we need to avoid detecting the object in the blind zone.

Factors affecting the measurement

Object shape and surface

Smooth and large plane as perpendicular to the sensor axis as possible
Rough/uneven surfaces are prone to scattering
Air current

The dense unstable high pressure air flow will affect the propagation of ultrasonic waves
Turbulence generated near particularly hot objects, such as red-hot metal, can cause ultrasonic dispersion
Temperature/humidity

Under standard conditions, the higher the temperature, the smaller the detection range
Under standard conditions, the higher the humidity, the smaller the detection range
Dust/rain/snow/frost

The above natural phenomena in the air will consume the ultrasonic propagation energy to a certain extent, resulting in a smaller detection distance
A small amount of dust attached to the detection surface has no effect