Chengdu JRT Meter Technology Co., Ltd
The difference between lidar and millimeter wave radar
A laser radar is a radar system that emits a laser beam to detect the position and velocity of a target. The millimeter wave radar refers to a radar that operates in the millimeter wave band. The millimeter wave is essentially an electromagnetic wave. The frequency band of the millimeter wave is special, the frequency is higher than the radio, lower than the visible light and the infrared light, and the frequency is roughly in the range of 10 GHz to 200 GHz. This is a very suitable frequency band for the automotive field. So what is the difference between lidar an
Application of laser obstacle avoidance technology
1. UAV obstacle avoidance In recent years, the drone market has grown rapidly, and the obstacle avoidance technology as a guarantee to increase the safe flight of drones has been changing with the development of technology. During the flight, the drone collects information about the surrounding environment through its sensors, measures the distance and makes corresponding action instructions, thereby achieving the obstacle avoidance function. Laser sensors are measured in a variety of ways, with triangulation similar to
What applications does the laser ranging sensor have in the military field?
1. Light portable pulse laser range finder Lightweight portable pulsed laser rangefinders include hand-held and front-end reconnaissance and leading edge-to-air control (FAC) dual-purpose laser rangefinders - target indicators for infantry and artillery reconnaissance. For the above-mentioned systems, it is required to be flexible, repetitively light, small in size, powered by a battery pack, high in reliability and maintainability, and low in cost of a single product. In
What applications does Lidar have in driverless driving?
1. Positioning Positioning in unmanned driving for ten minutes is important. Only with real-time location information can the system make the next interpretation, decide where to go, and how to get there. There are many ways to position it now. Such as carrier phase difference technology (RTK), but RTK is still subject to signal interference. Especially in some cities, buildings and trees, as well as tunnels and tunnels, its signal is easily interrupted. At the same time, sensors such as cameras are also used to se
What is laser detection technology?
Laser detection technology is widely used, such as laser interferometry, laser ranging, laser vibration, laser speed measurement, laser speckle measurement, laser collimation, laser holography, laser scanning, laser tracking, laser spectroscopy, etc. Great advantage of measurement. Laser heterodyne interference is an important technique for nanometer measurement. Laser measurement is a non-contact measurement that does not affect the motion of the object under test. It has high precision, large measurement range, short detection time and high spatial resolution.
TOF application scenario: vehicle electronics In automotive applications, ToF can be used for autonomous driving, anti-collision automatic braking and OOP. Supported by the time-of-flight (ToF) principle, the system accurately detects the driver's body and head position, even capturing his blinking action while wearing glasses or sunglasses to determine if the driver is sufficiently focused and pos
TOF, also known as time-of-flight ranging, is short for Time of Flight. The so-called time-of-flight 3D imaging is to obtain the target distance by continuously transmitting light pulses to the target, then receiving the light returned from the object with the sensor, and detecting the flight (round-trip) time of the light pulse. The ToF ranging method is a two-way ranging technique that measures the distance between nodes by using the time between the two asynchronous transceivers (or the reflected surface). The
Introduction to the characteristics of laser ranging sensor
A laser ranging sensor designed for non-contact distance measurement with a measuring range of up to 3,000 meters. These laser ranging sensors are used for positioning and type classification in machine building and handling equipment. Laser range sensor features: 1, laser ranging sensor high repeatability 2, Large measurement and measurement range for indoor and outdoor use
Chengdu JRT participated in China International Hardware Exhibition
In order to understand the information of the same industry, timely grasp the trends and laws of peer development; to examine the needs and development potential of foreign markets, and to more directly want to show our products to our customers, we will participate in China International Hardware Exhibition. Exhibition introduction: As the largest and the world's second largest hardware exhibition in Asia, China International Hardware Exhibition was once again co-sponsored by Cologne Exhibition and China Hardware Products Association. It has displayed leading products and techno
The principle of laser range finder
1, using the principle of infrared ranging or laser ranging The principle of ranging can basically be attributed to measuring the time required for the light to travel to and from the target, and then calculating the distance D by the speed of light c=299792458m/s and the atmospheric refractive index n. Since the direct measurement time is difficult, it is usually measured the phase of the continuous wave, which is called a phase measuring range finder. Of course, there are also pulsed range finder.
The laser scanning method is not only the main way to obtain 3D geographic information in the military, but also the data obtained through this method is widely used in resource exploration, urban planning, agricultural development, water conservancy engineering, land use, environmental monitoring, traffic communication, and earthquake prevention. Disaster reduction and national key construction projects have provided extremely important raw materials for national economic, social development and scientific research, and have achieved remarkable economic benefits
The difference between lidar and millimeter wave radar
In simple terms, laser radar mainly detects the surrounding environment by emitting a laser beam. Vehicle laser radar generally uses multiple laser emitters and receivers to establish a three-dimensional point cloud image to achieve real-time environment sensing. The advantage of Lidar is that it has a wider detection range and higher detection accuracy. However, Lidar also has disadvantages: poor performance in extreme weather such as rain, snow and fog. Millimeter wave radar
Laser range sensor application
Automotive Collision Detectors: In general, most existing automotive collision prevention systems use laser beam sensors that use laser beams to identify the distance between the target car in front of or behind the car in a contactless manner. When the distance is less than the predetermined safety distance, the automobile anti-collision system performs emergency braking on the vehicle, or issues an alarm to the driver, or comprehensively determines the target vehicle speed, the distance between the vehicle, the braking distance of the vehicle, and the response t
Definition and classification of lidar
Lidar is a general term for active sensors that detect environmental information through laser ranging technology. It uses a laser beam to detect targets, obtain data and generate accurate digital engineering models. At present, there are three types of laser ranging technology for laser radar: 1. The Laser Time of Flight (TOF) method can obtain the distance by multiplying the flight time of the light pulse between the target and the radar by the speed
Application of laser sensor in machinery manufacturing
The role of laser sensors mainly includes laser length measurement, laser ranging, laser vibration measurement, and laser speed measurement. Non-contact long-distance measurement can be achieved by using the high directivity, high monochromaticity and high brightness of the laser. Laser sensors are commonly used for measuring physical quantities such as length, distance, vibration, speed, and azimuth. They can also be used for flaw detection and monitoring of atmospheric pollutants. Laser length measurement
Lidar is now a relatively hot industry, mainly used in unmanned vehicles, robots, drones, equivalent to the eyes of these smart devices, used to detect the surrounding environment and perceived distance, and then feedback to these smart devices, let them know that should How to exercise, move forward, or say how to avoid obstacles. The main competitors encountered by laser ranging radars are millimeter-wave radars, which are farther away from millimeter-wave radars, and are not affected by the environment such as
Routine maintenance of laser range finder
The problem that needs attention when using the laser range finder: The laser range finder can not directly measure the human eye to prevent damage to the human body. At the same time, general laser range finder does not have waterproof function, so it is necessary to pay attention to waterproof. Lasers are precision instruments, so laser rangefinders can easily break the illuminators. Laser rangefinder maintenance: 1. Always check the appearance of the instrument to re
Lidar technology research and development difficulties
System complexity leads to excessive lidar volume Lidar, in short, is a high-precision sensor that realizes three-dimensional detection by actively transmitting and receiving laser signals. The working principle of laser radar is similar to that of microwave radar. The laser is used as a signal source, and the laser signal reaches the target surface-trees, roads, Bridges, buildings, etc., generate backscattering on the surface of the target, thereby returning a portion of the laser echo si
Traditional lidar scanning technology
Single point laser ranging with a suitable optomechanical scanning system to obtain large field of view, high resolution laser point cloud data. The proper scanning structure allows the radar to obtain a larger field of view and resolution, and at the same time promotes the stability of the entire radar structure. Therefore, the choice of scanning technology greatly affects the life cycle of the onboard laser radar, and then determines whether the radar is Can be applied to production cars.
The difference between remote laser range finder and short range laser range finder
The remote laser range finder and the short-range laser range finder are common: they are used to measure distance. The distance between the remote laser range finder and the short-range laser range finder is different: (1) The measured distance is different. (2) Different precision. (3) The industry to which it applies is different. (4) The remote laser range finder is for outdoor use, short-range laser range finder, for indoor use.
How to distinguish between visible light and invisible light?
We usually divide light into visible light and invisible light, which is actually divided according to whether the human eye can see it. Generally speaking, the visible and invisible light is related to the wavelength of light (or electromagnetic wave, light is electromagnetic wave). The wavelength of electromagnetic waves visible to the human eye ranges from 400 nm to 760 nm, and about 400 nm is purple light. The wavelength of the human eye can not be seen, it is ultraviolet light. The 760nm accessory is red light, the wavelength is larger than this range, and th
IP67 refers to the level of protection security. IP is an abbreviation for Ingress Protection Rating (or International Protection code), which defines an interface's ability to protect against liquid and solid particles. IP followed by 2 digits, the first is the solid state protection level, the range is 0-6, respectively, indicating protection against large particles of foreign matter to dust; the second is liquid protection level, the range is 0-8, respectively Protection against vertical water droplets to underwater pressure. A larger number indicates a s
Principle Difference between Ultrasound and Laser Range Finder
Ultrasound rangefinder/ranging sensor is based on the known speed of ultrasonic propagation in the air, and the characteristics of ultrasonic reflection when it encounters obstacles. Ultrasound transmitter transmits ultrasound in a certain direction. At the same time, it starts timing. Ultrasound spreads in the air. When it encounters obstacles on the way, it returns immediately. When the ultrasonic receiver receives the reflected wave, it immediately interrupts the timing. Then the actual distance between the transmitting point and the obstacle is calculated acco
The difference in performance between ultrasonic and laser range finder
1. Accuracy: The measurement accuracy of ultrasonic range finder is centimeter level, and the measurement accuracy of laser distance measuring sensor is millimeter level; 2. Measurement range: The measurement range of the ultrasonic range finder is usually within 80 meters, while the measurement range of the hand-held laser range finder is up to 200 meters, and th
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