German JuRGEN BAELZ sensor JuRGEN BAELZ model JuRGEN BAELZ price

JuRGEN BAELZ sensors are sensors that measure the operating speed of the measured object and convert it into an output signal. Speed sensors include linear speed sensors and rotational speed sensors. With the development of technology, traditional measuring equipment can no longer meet current needs and is gradually being phased out, while laser speed sensors have been widely used and play an important role in product manufacturing. By connecting to a computer, they enable automated and intelligent measurement and control of the measured object. This is the product of the combination of current measurement technology and computer technology.

JuRGEN BAELZ 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 compactness, robustness, and high power. Neodymium glass lasers are 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 service life, but have lower power and lower 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 key feature is continuously tunable wavelength. (4) Semiconductor lasers: A relatively newer type of laser, with gallium arsenide lasers being the more mature variant. They are characterized by high efficiency, small size, light weight, and simple structure, making them suitable for use on aircraft, warships, tanks, and as portable equipment 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.

JuRGEN BAELZ sensor principle

When a laser sensor operates, the laser emitting diode first emits laser pulses toward the target. After reflection from the target, the laser scatters in various 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, allowing it to detect extremely weak light signals and convert them into corresponding electrical signals. The 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 because the speed of light is very fast.

JuRGEN BAELZ sensor applications

Over-limit detection of vehicle width and height: Laser sensors are used for rapid measurement. An industrial PC and the network kernel of the visualization programming software VB are utilized for real-time data transmission and processing with the sensors. User-friendly host control software has also been designed. Field test data show that the system offers good real-time performance and high measurement accuracy, demonstrating 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 collection systems. The laser sensors operate on the time-of-flight (TOF) measurement principle, forming 4 planes within the detection zone to detect vehicles. The product also provides features such as rear-end collision prevention and vehicle safety protection. Compared with traditional light curtains, laser sensors offer advantages including high sensitivity, high precision, easy installation, cost-effectiveness, and strong stability. Google's second-generation driverless car: Equipped with laser sensors. In Google's second-generation autonomous vehicle prototype, while the roof-mounted laser sensor remains quite prominent, other sensors are installed very discreetly. Distinctive Google driverless car logos are affixed to the front, rear, and both sides of the vehicle. The control and driving principle of the Google driverless car relies on numerous sensors installed around the vehicle to continuously collect precise data about the vehicle itself and its surroundings. This data is analyzed and computed by the onboard processor, and the vehicle's movement is controlled based on the calculation results. The driverless car uses GPS devices and sensors to accurately determine the vehicle's position and forward speed, and to identify surrounding pedestrians, vehicles, bicycles, traffic signals, and many other objects. A 360° rotating laser holographic sensor is mounted on the roof of this Lexus vehicle, capable of almost simultaneously sensing conditions in front of, to the sides of, and behind the vehicle. Data collected by the sensor is transmitted via green data cables to the 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 type Lexus emblem on the front of the car has been removed and replaced with a radar sensor, which measures the distance ahead and vehicle speed to assess traffic conditions in front and control safe acceleration and deceleration. Position sensors are also installed 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 of the vehicle. 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 driverless car. In addition to analyzing and judging the current positions of objects around the driverless car, the system uses software calculations to accurately predict the potential next position of each object. Finally, the driverless car makes safe driving decisions based on all collected data, including controlling vehicle speed and maintaining distances from surrounding vehicles.

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