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 Ultrasonic sensors serve for the automatic detection of positions and distances of objects. The great advantage of ultrasonic sensors is their independency of the surfaces' characteristics. Ultrasonic sensors from Pulsotronic work with an ultrasonic transducer for sending and receiving sound waves. Specially coded ultrasonic signals are transmitted in a set clock. After reflexion by the target the signals reach the sensor and are decoded.
The recorded transit time is converted into distance information data. Due to high carrier frequencies and the latest signal processing technology our sensors guarantee failure-free and precise operation. Analog, digital or switching outputs as well as RS232 and RS485 interfaces serve for circulating data to a pc. Several sensors can be used at the same time via syncronising devices which make it possible to scan structures with sensor arrays.
We provide a broad range of ultrasonic sensors, appropriate for applications in various fields. One- and two-piece, analog and programmable proximity sensors as well as ultrasonic barriers. Our sensors ensure high resolution, optimum precision, little minimum distances and long range. They are conform to IP67.
Technical Parameters
Targets
Almost all objects and materials reflect ultrasound and can therefore be detected, whether they are fluid, liquid or powdery. Ultrasonic sensors even recognize noise-absorbing substances such as padding or rubber foam. The capacity of these sensors to detect transparent objects is of special importance.
Maximum Sensing Range
The maximum sensing range depends on the targets reflexion capability (dimension, material, surface). Colour and form of the
object can vary as long as a sufficient echo is reflected to the sensor. Another advantage of ultrasonic sensors is the detection of very small objects, e.g. wire with a diameter of 0,2mm. However any objects deviating from the ideal reduce the maximum range and also the stability of the result.
Sonic Beam
The angle of the sonic beam indicates the 3dB limits. Close proximity objects can also be detected outside of the these limits. At maximum distance the target must be placed rectangular to the sonic axis.
Measurement Range
The measurement range is defined by the maximum sensing range and the minimum measurement distance.
Measurement Rate
Only when the echo impulse has reached the ultrasonic transducer and the transducer has decayed, a new impulse can be transmitted. Therefore ultrasonic sensors with large measurement distances have low measurement rates and ultrasonic sensors with little measurement distances have high measurement rates.
Minimum Distance, Blind Zone
The sensors use a transducer for sending and receiving the ultrasonic impulse. As the transducer cannot send and receive at the
same time, there is a blind zone in front of the sensor. In this blind zone the position of an object cannot be detected.
Sensing Range
The maximum sensing range is the distance in which a sufficient echo can be received by the transducer.
Applications
Ultrasonic sensors from Pulsotronic are appropriate for a wide range of different applications. The following list describes some examples.
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Distance measurement of machinery parts and other products in motion
- Detection of moving objects made of all kind of material, including glass
- Presence detection of objects
- Object counting
- Completeness check in containers (bottles in cartons)
- Fill level measurement of bulk storage and liquids in silos and tanks
- Winding and unwinding control of coils in the paper, the foil and the textile industry
- Web tension or loop control in multi-stage operating processes
- Sorting control by measuring the height profile of packing items
- Position control by measuring the stacking height and projections on loading machines
- Collision avoidance in the case on self-controlled transport vehicles
Environmental Influences
Environmental conditions such as humidity, dust and smoke don't influence the precision of measurement. The sensors are designed for the use in atmospheric air. The operation in other gases, e.g. carbon monoxide, can result in measurement errors due to the deviating sound velocitiy and attenuation. Also solvents evaporating from liquids can influence the sensors' function. All ultrasonic sensors from Pulsotronic work with temperature compensation in order to balance variations in sound velocity caused by thermal fluctuation. Strong motion in air and turbulences cause instability in measurement. Anyway, air stream speeds of several m/s can be handled so that open air applications are possible.
Installation
Ultrasonic sensors can be mounted in any desired position as long as deposits on the sensors active surface are prevented. The
ultrasonic beam can be re-directed by using reflectors though this causes a decrease of the maximum sensing range. Concentrating the sound beam is possible with a focussing reflector.
Ultrasonic Sensors Models Downloads:
Ultrasonic Sensors
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