Classification and application of industrial microscopes
Problems that need to be paid attention to when using the laser rangefinder: The laser rangefinder cannot be aimed at the human eye for direct measurement to prevent damage to the human body. At the same time, the general laser rangefinder of the vibration meter is not waterproof, so it needs to pay attention to waterproofing. The latest American Leoport laser rangefinder and illuminance meter are mainly used for outdoor hunting enthusiasts in the United States, so the advantage of the production is that it can be waterproof and anti-fog, and it is equipped with jungle tree branches and leaves.
The laser does not have the function of anti-drop, so the laser rangefinder is easy to break the light emitter.
Laser rangefinder maintenance:
① Frequently check the appearance of the instrument and remove dust, grease, mildew, etc. on the surface in time.
② When cleaning the eyepiece, objective lens or laser emission window, use a soft dry cloth. It is strictly forbidden to scratch with hard objects, so as not to damage the optical performance.
③ This machine is a high-precision instrument integrating light, machinery and electricity. It should be handled with care during use. It is strictly forbidden to squeeze or drop from a high place to avoid damage to the instrument.
Principle of range finder
1. Laser range finder
The laser rangefinder is an instrument that uses laser to accurately measure the distance of the target. When the laser range finder is working, it emits a very thin laser beam to the target, and the photoelectric element receives the laser beam reflected by the target. The timer measures the time from the launch to the reception of the laser beam, and calculates the distance from the observer to the target.
Laser range finder is currently the most widely used range finder, and laser range finder can be classified into handheld laser range finder (measurement distance 0-300 meters), telescope laser range finder (measurement distance 500-3000 meters) .
2. Ultrasonic distance meter
The ultrasonic range finder measures according to the characteristics of ultrasonic waves reflected back when encountering obstacles. The ultrasonic transmitter emits ultrasonic waves in a certain direction, and starts timing at the same time as the emission. The ultrasonic waves propagate in the air, and return immediately when encountering obstacles on the way, and the ultrasonic receiver immediately interrupts and stops timing when it receives the reflected wave. By continuously detecting the echoes reflected by obstacles after the generated waves are emitted, the time difference T between the emitted ultrasonic waves and the received echoes is measured, and then the distance L is calculated.
Ultrasonic range finder, because the ultrasonic wave is greatly affected by the surrounding environment, so the general measurement distance is relatively short, and the measurement accuracy is relatively low. At present, the scope of use is not very wide, but the price is relatively low, generally around several hundred yuan.
3. Infrared range finder
An instrument that uses modulated infrared light for precise distance measurement, and the measurement range is generally 1-5 kilometers. The non-diffusion principle of infrared rays is used: because infrared rays have a small refractive index when passing through other substances, long-distance rangefinders will consider infrared rays, and the propagation of infrared rays takes time. When infrared rays are sent from the rangefinder When encountering a reflective object, it is reflected back and received by the rangefinder, and then the distance can be calculated according to the time from sending out to being received by the infrared ray and the propagation speed of the infrared ray
