Mirror reflective ultrasonic sensor/features
• No specific reflectors, metal/plastic panels or wall backgrounds are available
• Can detect sound wave sensitive materials or surface tilt
• Low switching frequency, below 10Hz, suitable for detecting objects that run at a slower speed
• No blind area (but the reflector has), the blind area is generally less than 10% of the detection distance

How to calculate the detection distance of ultrasonic sensor

3BHE039203R0101-GVC736CE101 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 3BHE039203R0101-GVC736CE101 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
• Dense unstable high pressure air flow will have an impact on the propagation of ultrasonic waves
• Turbulence generated near particularly high temperature objects, such as red-hot metal, can cause ultrasonic dispersion

Temperature/humidity
• 3BHE039203R0101-GVC736CE101 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 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

As the leading sensor solutions provider in the market, Leucombe 3BHE039203R0101-GVC736CE101 has introduced a range of high-performance ultrasonic sensors with a deep track record of innovation and a strong commitment to product quality. For example, the new HTU200 and DMU200 series of switching and measuring ultrasonic sensors. The new cylindrical ultrasonic sensor has a robust metal housing and is ideal for the packaging or automotive industries.

Apply

Monitor the liquid level of small open container

Requirements:

On the filling line, liquids are detected by passing through very small container openings.

Solution:

The new compact ultrasonic sensor HTU208 uses the threaded sleeve of construction M8 and has a very slender sound flap, which allows the level to be monitored by passing through very small container openings.

Loop control in the automotive industry

Requirements:

In the cutting system of the automotive industry, the cutting process must be separated from belt transport. In order to provide the control system with the necessary measurements to calculate the traction speed, the sag of the belt ring should be determined in a non-contact manner.

Solution:

The DMU218 series or DMU230 series measurement ultrasonic sensors have a robust metal housing and different detection ranges for sag control. It can provide analog current or voltage output and IO-Link interface.