Double Sheet Sensor

USSR is professional manufacturer of double sheet sensor. In year 2023, we sold more than 5000 sets. So we can provide good price. If you want it in bulk, the wholesale price is available. There are three types for choice, namely M12, M18, M30. Ultrasonic sensors include two modes —— diffuse and thru-beam. Double sheet detector belongs to the latter mode.

Double sheet sensor is a non-contact ultrasonic sensor. We usually use it to detect overlapping thin sheet materials. For example, the double sheet detector switch can check papers, metal foils, plastic films, labels. Or monitor the double feeding of solar wafers, wood plates and PCB circuit board. So it has wide applications in machines, such as printing, folding, lithium battery laminating, labeling and punching, etc.

Detection range of our ultrasonic double sheet sensor for different materials

We have actually tested our double splice sensors. The below table lists the thickness limit data for different blanks.

Material	Can Detect	Can Detect	Can't Detect
Matte Coated Paper	105 (g)	4842 (g)	5052 (g)
Silicon Wafer	0.118mm	0.44mm	0.58mm
High Precision Iron Piece	0.05mm	0.1mm	0.2mm
Copper Piece	0.05mm	0.16mm	0.24mm
Plastic Piece	0.33mm	1.43mm	1.9mm
Glass Piece	0.08mm	0.55mm	0.7mm
Aluminum Piece	0.2mm	0.5mm	0.8mm

Kind note:

① The data above is for M18 double sheet sensor. If it is M12, the thickest data should be reduced by 20%.

② The data above is based on the V04 program.

③ We obtain the un-measurable value of matte pink paper by this way: paste multiple papers together.

④ We get the un-measurable value of the silicon wafer by this way: paste 0.44mm and 0.13mm silicon wafers together when exposed to water.

Highlights & Features of USSR Double Blank Detector Sensor

Highlights: Control output from 3 ports; Learn single sheets based on any material;

Basic features: NPN/PNP output from 3 ports; Detect single and double sheets of various materials; Output mode can be changed through serial port upgrade; Implement learning functions for different materials through learning wires; Temperature compensation;

Teach-in Learning Methods:

Double blank sensor can detect different sheet materials. But how do we switch to measure these materials. Below are the teach-in steps: M18 series sensor: 1. Place a single sheet of tested material between two sensors; 2. Connect the learning line to - UB. 3. Power on and green light will be flashing. When the red and yellow lights flash alternately or simultaneously and when the red light or the yellow light flashes or they flash simultaneously, the learning is completed. If the learning is not successful, the red light will always light up once, Then the green light flashes and enters the learning state again. 4. Power off and float the learning line into the air. 5.Normal use.

M12 series sensor: 1. Place a single sheet of the tested object within the detection range and power it on. 2. Short circuit the learning wire (red wire) to the negative electrode (green wire). 3. The green light continues to flash for more than 3 seconds, indicating successful learning (after successful learning, the product will no longer learn. Learning failure situation: A red light flashing indicates that the measured object is too thick or not connected for emission, while a yellow light flashing indicates that the measured object is not placed or too thin. When learning fails, the indicator light goes out briefly. Automatic re-learning.) 4. Learning wire overhangs and reapply power. The product works normally.

Common Different Industry Applications

Why We Need Ultrasonic Double Sheet Detector?

How Does the Double Sheet Detection Sensor Work?

Actually, ultrasonic sensors contain 2 types. One is for distance measurement. The other is for energy measurement. Ultrasonic proximity switch belongs to the former. The double blank sensor belongs to the latter. Besides, it has two parts: the long part is transmitter, and the short part is receiver. What's the working principle?

It belong to the through-beam ultrasonic sensor. The emitter sends a specific frequency ultrasonic wave. They penetrate the target object. During the process, some energy is reflected and absorbed by the target. Finally the remaining energy is received by the receiver. Therefore, we can determine the single and double sheets according to the energy change.

(1) First case: no blank material enters between double sheet sensor. In this case, there is no blocking. All of the emitted energy is received by the receiver. Therefore, we can determine that there is no medium.

(2) Second case: a sheet material enters between two transducers. The object will transmit some of the energy to the receiver. The transmission energy bases on the thickness and density of the object.

The figure shows that the transmission energy is 10% of the emitted energy. At this time, the received energy will be much less than the energy when there is no blocking. However, it can detect the received energy. Then we judge it to be the single sheet.

(3) The third case: double sheet materials enter between the sensor transducers. The ultrasonic waves travel through the air and comes into contact with the first sheet. At this time, the energy is attenuated by 90%. This part of energy will continue travelling. Then it contacts the second sheet. Finally, only 1% of the energy remains. As a result, the receiver receives almost no energy. We judge it as the double sheet.