Digital tachometers with laser sensors have only three unique advantages compared to other non-contact speeds. First, the non-contact working distance can be as far as 10 m. Secondly, only the laser tachometer can measure the rotation speed of the animal in addition to the rotation, and the operation is simple, the reading is reliable. Second, the anti-interference ability is strong. .
The laser sensor in the laser tachometer obtains the principle of rotating the rotating object, as shown in Figure 10-10.
After the laser beam emitted by the helium neon laser 1 passes through the half mirror 2, the transmitted beam of half the intensity passes through the emitting optical system composed of the lens 3, and is focused on the surface of the rotating object 5. A small piece is attached to the surface of the rotating object. Directional anti-elbow material 4 (referred to as "reflective paper"). When the object rotates, when the laser beam is irradiated onto the surface on which the reflective paper is applied, most of the laser light is scattered in all directions of the space, and the beam that can return along the emission optical axis is extremely weak. Therefore, the photocell does not feel any information.
Once the reflective paper is illuminated by the laser beam during rotation, due to the "directional reflection regression" characteristic of the reflective paper, a part of the laser beam returns along the original path of the emitted light to the semi-transparent mirror, and sees through the reflection and the lens 6 converges. On the phototransistor 7, the island object rotates once, the reflective paper is irradiated by the laser once, and a laser pulse returns to the photocell. After receiving and converting, an electric pulse is generated. The object rotates continuously, and the photocell outputs a series of electricity. Pulse, this is the rotational speed signal of the rotating object captured by the laser sensor.
Guangdong Oujun Technology Co., Ltd. is a national high-tech enterprise established in 2006. It is a professional lighting manufacturer integrating R&D, design, production, sales and service. Specializing in the production of cord switches, high-precision connectors and other products, the products are widely used in lighting, electrical and other industries. The company's products have more than 60 patents at home and abroad, including 4 US patents and a number of national award-winning invention patents. The company covers an area of more than 13,000 square meters, has more than 180 front-line production employees, and more than 20 technical elites; realize automatic injection molding production , Integrated automatic installation and testing. With efficient production capacity, excellent quality and honest service, the company has developed into a modern enterprise that provides a full range of one-stop services.
At the beginning of the company's establishment, the business philosophy of "focus on intelligent manufacturing and dedicated service" was determined. The management has been continuously optimized and obtained the ISO9001 quality management system certification issued by the British Royal Authorized Organization SIRA; the products have respectively obtained VDE, UL, ENEC, SAA, KC, PSE, TUV, ASTA, SASO, CQC and other international safety certifications. Set up a professional testing laboratory to ensure the stability and improvement of quality under efficient production, so that product services can be brought to a higher level.
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