German LEWIS TOLERIE sensor, LEWIS TOLERIE model, LEWIS TOLERIE price

LEWIS TOLERIE sensors are devices that convert mass signals into measurable electrical signal outputs. When using a sensor, the actual working environment of the sensor should be considered first. This is crucial for the correct selection of load cells, as it affects whether the sensor can work normally, its safety and service life, and even the reliability and safety of the entire weighing instrument. There are qualitative differences between the old and new national standards in the basic concepts and evaluation methods of the main technical indicators of load cells. The main types include S type, cantilever type, spoke type, plate ring type, membrane box type, bridge type, column cylinder type, and several other styles.

LEWIS TOLERIE sensor classification

Lasers can be divided into 4 types according to the working medium. (1) Solid-state laser: Its working medium is solid. Commonly used ones include ruby lasers, neodymium-doped yttrium aluminum garnet lasers (i.e., YAG lasers), and neodymium glass lasers. Their structures are roughly similar, characterized by being small and robust with high power. Neodymium glass lasers are devices with the highest pulse output power, reaching tens of megawatts. (2) Gas laser: Its working medium is gas. There are now various gas atomic, ion, metal vapor, and gas molecule lasers. Commonly used ones include carbon dioxide lasers, helium-neon lasers, and carbon monoxide lasers. Their shape is like ordinary discharge tubes, characterized by stable output, good monochromaticity, and long life, but lower power and lower conversion efficiency. (3) Liquid laser: It can be further divided into chelate lasers, inorganic liquid lasers, and organic dye lasers, among which organic dye lasers are the most important. Their greatest feature is that the wavelength is continuously tunable. (4) Semiconductor laser: It is a relatively young type of laser, among which gallium arsenide lasers are more mature. Features include high efficiency, small size, light weight, and simple structure, making them suitable for carrying on aircraft, warships, tanks, and by infantry. They can be made into rangefinders and sights. However, the output power is small, directivity is poor, and they are greatly affected by ambient temperature.

LEWIS TOLERIE sensor principle

When a laser sensor works, the laser emitting diode first emits laser pulses toward the target. After reflection from the target, the laser scatters in all directions. Part of the scattered light returns to the sensor receiver, is received by the optical system, and is imaged onto an avalanche photodiode. An avalanche photodiode is an optical sensor with internal amplification function, so it can detect extremely weak light signals and convert them into corresponding electrical signals. The common type is the laser distance measurement sensor, which determines the target distance by recording and processing the time elapsed from the emission of the light pulse to its return and reception. Laser sensors must measure transmission time extremely accurately because the speed of light is too fast.

LEWIS TOLERIE sensor applications

Over-limit detection of vehicle width and height: Laser sensors are used for rapid measurement. The network kernel of PC industrial PC and visualization programming software VB is utilized for real-time data transmission and processing with the sensors. User-friendly host computer control software is also designed. Field test data shows that the system has good real-time performance and high measurement accuracy, possessing certain practical value. Highway toll stations: Used at highway toll stations for vehicle counting and safety protection. Malaysia's Teras company has already applied hundreds of sets of BEA laser sensors in its manual and automatic toll station systems. The laser sensor adopts the Time of Flight (TOF) measurement principle, forming 4 planes in the detection area to detect vehicles. Meanwhile, the product also has functions such as anti-rear-end collision and vehicle safety protection. Compared with traditional light curtains, laser sensors have advantages such as high sensitivity, high precision, convenient installation, high cost-performance ratio, and strong stability. Google's second-generation unmanned vehicle: Equipped with laser sensors. In Google's second-generation autonomous driving prototype car, besides the laser sensor on the top which remains quite obvious, other sensors are set very discreetly. Obvious Google unmanned vehicle logos are posted on the front, rear, and both sides of the vehicle. The control and driving principle of Google's unmanned vehicle is to continuously collect various precise data of the vehicle itself and its surroundings through numerous sensors installed around the car, analyze and calculate through the processor inside the car, and then control the vehicle's movement based on the calculation results. The unmanned vehicle uses GPS equipment and sensors to accurately locate the vehicle's position and forward speed, and to judge surrounding pedestrians, vehicles, bicycles, traffic lights, and many other objects. On the roof of this Lexus car, there is a laser holographic sensor rotating 360°, which can almost simultaneously sense the conditions in front, on the sides, and behind the car. The data collected by the sensor is input into the processor located on the right rear side of the vehicle through green data cables. This laser sensor also allows the unmanned vehicle to achieve global precise positioning. The original L type Lexus emblem on the front of the car was also removed and replaced with a radar sensor; it is used to measure the distance ahead and vehicle speed to determine the traffic conditions ahead and control safe acceleration and deceleration of the vehicle. Position sensors are also installed on the tire hubs to detect wheel rotation and help with vehicle positioning. The heart of Google's unmanned vehicle—the processor—is located on the right rear side of the vehicle. Data information from various sensors is transmitted here through data wires, analyzed and processed by software for precise sensing and judgment of different objects near the unmanned vehicle. In addition to analyzing and judging the current positions of objects around the unmanned vehicle, the unmanned vehicle also needs to calculate through software to accurately predict the possible next position of each object. Finally, the unmanned vehicle will make safe driving decisions based on all collected data, including controlling vehicle speed and distance from surrounding vehicles.

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