German M+W sensor M+W model M+W price

M+W sensors are devices that measure the operating speed of a target object and convert it into an output signal. Speed sensors include linear speed sensors and rotational speed sensors. With technological advancements, traditional measurement equipment can no longer meet current demands and is gradually being phased out, while laser speed sensors are now widely used. They play a significant role in product manufacturing processes; by connecting to a computer, they enable automated and intelligent measurement and control of the target object. This represents the integration of modern measurement technology with computer technology.

M+W sensor classification

Lasers can be classified into 4 types based on their gain medium. (1) Solid-state lasers: The gain medium is solid. Common examples include ruby lasers, neodymium-doped yttrium aluminum garnet lasers (i.e., YAG lasers), and neodymium glass lasers. Their structures are similar, characterized by compactness, robustness, and high power. Neodymium glass lasers offer the highest pulsed output power, reaching tens of megawatts. (2) Gas lasers: The gain medium is gas. Various types exist, including gas atom, ion, metal vapor, and gas molecule lasers. Common examples include carbon dioxide lasers, helium-neon lasers, and carbon monoxide lasers. Shaped like standard discharge tubes, they feature stable output, good monochromaticity, and long service life, but have lower power and conversion efficiency. (3) Liquid lasers: These include chelate lasers, inorganic liquid lasers, and organic dye lasers, with organic dye lasers being the most important due to their continuously tunable wavelength. (4) Semiconductor lasers: A relatively newer type of laser, with gallium arsenide lasers being the more mature variant. They feature high efficiency, small size, light weight, and simple structure, making them suitable for use in aircraft, warships, tanks, and as portable devices for infantry. They can be made into rangefinders and sights. However, they have lower output power, poorer directionality, and are significantly affected by ambient temperature.

M+W sensor principle

When a laser sensor operates, a laser diode emits laser pulses toward the target. After reflecting off the target, the laser scatters in various directions. Part of the scattered light returns to the sensor receiver, where it is captured by the optical system and focused onto an avalanche photodiode. An avalanche photodiode is an optical sensor with internal amplification capabilities, allowing it to detect extremely weak light signals and convert them into corresponding electrical signals. A common type is the laser distance sensor, which determines 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.

M+W sensor applications

Oversize vehicle width and height detection: Laser sensors are used for rapid measurement. An PC industrial PC and the network kernel of visualization programming software VB facilitate real-time data transmission and processing with the sensors. User-friendly host control software has also been designed. Field test data indicates that the system offers good real-time performance and high measurement accuracy, demonstrating practical value. Highway toll stations: Used at highway toll booths for vehicle counting and safety protection. Malaysia's Teras company has deployed hundreds of BEA laser sensors in its manual and automatic toll collection systems. These laser sensors use the Time-of-Flight (TOF) measurement principle to create 4 planes within the detection zone for vehicle monitoring. The product also features anti-rear-end collision and vehicle safety protection functions. Compared to traditional light curtains, laser sensors offer advantages such as high sensitivity, high accuracy, easy installation, cost-effectiveness, and strong stability. Google's second-generation driverless car: Equipped with laser sensors, the prototype of Google's second-generation autonomous vehicle retains a prominent roof-mounted laser sensor, while other sensors are discreetly integrated. The front, rear, and sides of the vehicle display clear Google driverless car markings. The control and driving principle involves numerous sensors installed around the vehicle continuously collecting precise data about the vehicle itself and its surroundings. An onboard processor analyzes and computes this data to control the vehicle's movement. The driverless car uses GPS devices and sensors to accurately determine its position and forward speed, identifying pedestrians, vehicles, bicycles, traffic lights, and other objects nearby. The Lexus vehicle features a 360° rotating laser holographic sensor on its roof, capable of simultaneously sensing conditions in front, to the sides, and behind the vehicle. Data collected by the sensor is transmitted via green data cables to a processor located at the rear right side of the vehicle. This laser sensor also enables global precise positioning for the driverless car. The original L emblem on the front of the Lexus was removed and replaced with a radar sensor to measure forward distance and vehicle speed, allowing for assessment of traffic conditions ahead and controlling safe acceleration and deceleration. Position sensors are also mounted on the wheel hubs to detect wheel rotation, aiding in vehicle localization. The heart of the Google driverless car—the processor—is located at the rear right side. Data from all sensors is transmitted here via data cables for software-based analysis and processing, enabling precise sensing and judgment of different objects near the vehicle. In addition to analyzing and judging the current positions of objects around the vehicle, the software calculates and accurately predicts the potential next positions of each object. Finally, the driverless car makes safe driving decisions based on all collected data, including controlling speed and maintaining distance from surrounding vehicles.

Weidou Intelligent Technology specializes in selling German M+W sensors, M+W proximity sensors, M+W distance sensors, M+W vision sensors, M+W displacement sensors, M+W torque sensors, M+W speed sensors, M+W photoelectric sensors, M+W position sensors, M+W angle sensors, M+W tactile sensors, M+W temperature sensors, M+W pressure sensors, M+W flow sensors, M+W level sensors, M+W motion sensors, and M+W process sensors. All products are original imports from Germany. Customers are welcome to inquire and place orders.