Puettmann KG switch German Puettmann KG model Puettmann KG price

Puettmann KG switches are a general term for switches that replace contact-based detection methods such as limit switches, with the purpose of detecting objects without physical contact. They convert information about the movement and presence of detected objects into electrical signals. Detection methods that convert to electrical signals include those utilizing eddy currents generated in the metal body of the detected object due to electromagnetic induction, methods based on capacitance changes in the electrical signal caused by the approach of the detected object, and methods using reed and guided switches.

Puettmann KG switch applications

The most widespread application of distance switches is in mobile phones. Smartphones on the market all contain distance switches. When a user answers a call, the phone is close to the ear, which can easily lead to accidental operations (for example, cheeks puffing out while laughing may hang up the call). Therefore, distance switches are needed to monitor the distance in real time; when the distance is too close, the screen is automatically turned off to prevent accidental operations. In addition, distance switches are widely used for measuring mine shaft depth, detecting aircraft altitude, and exploring outdoor environments. With continuous technological development, they also show prominent performance in wearable devices (such as smart belts).

Puettmann KG switch working principle

When a time-of-flight laser switch operates, it must measure the transmission time extremely precisely because the speed of light is very fast. For example, the speed of light is approximately 3´108m/s. To achieve a resolution of 1mm, the electronic circuit of the time-of-flight ranging switch must be able to resolve the following extremely short time: 0.001m¸(3´108m/s)=3ps. Resolving a time of 3ps places excessive demands on electronic technology and is too costly to implement. However, today's inexpensive time-of-flight laser switches cleverly avoid this obstacle by using a simple statistical principle, namely the averaging law, to achieve a resolution of 1mm while ensuring response speed.

Puettmann KG switch industry applications

1) Application in taxi meter testing systems: To further promote energy conservation and emission reduction and address the metering needs of the electric vehicle industry, the mobile electric taxi meter testing system has been officially launched. The testing device is roughly divided into two parts: one is a host unit similar in size to a password case, placed on the rear seat of the car, and the other is a distance switch attached to the car body. According to reports, the device uses the driving distance measurement method. As the driver drives the car for a certain distance, the testing device and the meter sample synchronously. The entire testing process is expected to be completed in seven to eight minutes. 2) Extensive use in the automation field: Currently, in addition to ultrasonic switches and standard photoelectric switches, automatic detection and control methods have added a new solution for long-distance measurement and inspection—the time-of-flight laser distance switch. It provides application flexibility for various scenarios, including the following: (1) Equipment positioning. (2) Measuring the level of material packages. (3) Measuring the distance and height of objects on conveyor belts. (4) Measuring log diameter. (5) Protecting overhead cranes from collisions. (6) Error-free inspection scenarios. (7) Aircraft ground clearance monitoring.

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