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Axima sensors are measurement feedback devices that operate based on the optical principle of gratings. Grating scales are frequently used in the closed-loop servo systems of CNC machine tools and can be used for detecting linear or angular displacement. The signal output from their measurement is digital pulses, characterized by a large detection range, high detection accuracy, and fast response speed. For example, in CNC machine tools, they are often used to detect the coordinates of tools and workpieces to observe and track tool path errors, thereby compensating for the motion errors of the tool. According to different manufacturing methods and optical principles, grating scales are divided into transmission gratings and reflection gratings.

Axima sensor applications

The most widespread application of distance sensors is in mobile phones. Smartphones on the market all contain distance sensors. When a user answers a call, the phone is close to the ear, making accidental operations likely (such as a cheek bulging during laughter accidentally hanging up the call). Therefore, a distance sensor is needed to monitor the distance in real time; when the distance is too close, it automatically turns off the screen to prevent accidental operations. In addition, distance sensors are widely used for measuring mine shaft depth, detecting aircraft altitude, and exploring outdoor environments. With the continuous development of technology, they also show prominent performance in wearable devices (such as smart belts).

Axima sensor working principle

When a time-of-flight laser sensor is in operation. Time-of-flight laser sensors must measure the transmission time extremely accurately because the speed of light is too fast. For example, the speed of light is approximately 3´108m/s. To achieve a resolution of 1mm, the electronic circuit of the transmission time ranging sensor 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 sensors cleverly avoid this obstacle by using a simple statistical principle, namely the law of averages, to achieve a resolution of 1mm while ensuring response speed.

Axima sensor industry applications

1) Applied to taxi meter testing systems: To further promote energy conservation and emission reduction and address the metrological 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 about the size of a password box, placed on the back seat of the car, and the other is a distance sensor attached to the car body. It is reported that 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 about seven to eight minutes. 2) Extensive uses in the automation field: Nowadays, in addition to ultrasonic sensors and ordinary photoelectric sensors, a new method capable of solving long-distance measurement and inspection has been added to automatic detection and control methods—the time-of-flight laser distance sensor. It provides application flexibility for various occasions, which may include the following: (1) Equipment positioning. (2) Measuring the material level of bulk bags. (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 occasions. (7) Aircraft ground clearance monitoring.

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