German gwk sensor gwk model gwk price

gwk sensors are devices or units that can sense pressure signals and convert them into usable output electrical signals according to a specific pattern. Pressure sensors typically consist of a pressure-sensitive element and a signal processing unit. Depending on the type of test pressure, pressure sensors can be classified as gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. Pressure sensors are one of the most commonly used sensors in industrial practice, widely applied in various industrial automation control environments, involving numerous industries such as water conservancy and hydropower, railway transportation, smart buildings, production process control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, and pipelines.

gwk sensor classification

Lasers can be divided into 4 types based on the working medium. (1) Solid-state lasers: The working medium is solid. Common types 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 compact, robust, and high-power. Neodymium glass lasers are the devices with the highest pulsed output power, reaching tens of megawatts. (2) Gas lasers: The working medium is gas. Various gas atomic, ion, metal vapor, and gas molecular lasers are now available. Common types include carbon dioxide lasers, helium-neon lasers, and carbon monoxide lasers. Shaped like ordinary discharge tubes, they feature stable output, good monochromaticity, and long life, but have lower power and conversion efficiency. (3) Liquid lasers: These can be further divided into chelate lasers, inorganic liquid lasers, and organic dye lasers, with organic dye lasers being the most important. Their main characteristic is continuously tunable wavelength. (4) Semiconductor lasers: A relatively newer type of laser, with gallium arsenide lasers being the more mature variant. Characteristics 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, they have lower output power, poorer directionality, and are significantly affected by ambient temperature.

gwk sensor principle

When a laser sensor operates, a 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, where it is received by the optical system and imaged onto an avalanche photodiode. An avalanche photodiode is an optical sensor with internal amplification capability, enabling it to detect extremely weak light signals and convert them into corresponding electrical signals. Laser distance-measuring sensors are common; they determine the target distance by recording and processing the time elapsed from the emission of the light pulse to its reception. Laser sensors must measure transmission time with extreme precision due to the high speed of light.

gwk sensor applications

Over-limit detection of vehicle width and height: Laser sensors are used for rapid measurement. An PC industrial PC and the network kernel of visualization programming software VB are utilized for real-time data transmission and processing with the sensors. User-friendly host computer control software has also been designed. Field test data indicates that the system offers 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 deployed hundreds of BEA laser sensors in its manual and automatic toll station systems. The laser sensors use the Time-of-Flight (TOF) measurement principle to form 4 planes within the detection area for vehicle inspection. Additionally, the product features functions such as anti-rear-end collision and vehicle safety protection. Compared to traditional light curtains, laser sensors offer advantages such as high sensitivity, high precision, easy installation, high cost-performance ratio, and strong stability. Google's second-generation driverless car: Equipped with laser sensors, the prototype of Google's second-generation autonomous vehicle still has a quite prominent laser sensor on top, while other sensors are set up very discreetly. Distinctive Google driverless car logos are affixed to the front, rear, and sides of the vehicle. The control and driving principle of the Google driverless car involves numerous sensors installed around the car continuously collecting precise data about the vehicle itself and its surroundings. This data is analyzed and computed by the onboard processor, which then controls the vehicle's movement based on the calculation results. The driverless car utilizes GPS equipment and sensors to accurately locate the vehicle's position and forward speed, identifying surrounding pedestrians, vehicles, bicycles, traffic lights, and many other objects. On the roof of this Lexus is a 360° rotating laser holographic sensor, capable of almost simultaneously sensing conditions in front of, to the side of, and behind the car. Data collected by the sensor is input via green data cables into the processor located at the right rear of the vehicle. This laser sensor also enables global precise positioning for the driverless car. The original L type Lexus emblem on the front of the car was removed and replaced with a radar sensor used to measure forward distance and vehicle speed, allowing determination of forward traffic conditions and controlling safe acceleration and deceleration. Position sensors are also mounted on the tire hubs to detect wheel rotation, aiding in vehicle localization. The heart of the Google driverless car—the processor—is located at the right rear of the vehicle. Data information from various sensors is transmitted here via data cables for software analysis and processing, enabling precise sensing and judgment of different objects near the driverless car. In addition to analyzing and judging the current positions of objects around the driverless car, the vehicle needs to use software calculations to accurately predict the possible next position of each object. Finally, the driverless car makes safe driving decisions based on all collected data, including controlling vehicle speed and maintaining distance from surrounding vehicles.

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