How to choose a safety light curtain sensor?

As we all know, safety grating sensors, as professional protective devices in the industrial production industry, are widely used in stamping equipment, automated machinery, automated welding lines, shearing equipment and other fields, and their main role is to effectively prevent the occurrence of safety accidents and prevent the company's production and workers' personal safety. Therefore, when choosing a safety grating sensor, the first consideration must be the performance quality of the grating, and choose high-quality and low-cost manufacturers and brands on the basis of reliable quality and excellent performance.

1. It is important to pay attention to the source of the safety grating sensor. When we buy products for any purpose, we will pay attention to whether their quality is qualified, and the safety protection devices for professional purposes such as safety grating sensors should not relax their quality standards. Compared with unqualified grating products, the product performance of safety grating sensors from formal or "famous" sources is also more reliable.

Conduct as detailed investigation and understanding as possible of the manufacturers of the safety grating sensors selected, and choose the safety grating sensors of regular production and sales channels, which is responsible for production efficiency and personal safety.

2. Pay attention to the use environment of the safety grating sensor. If the safety grating sensor is used in a harsh environment such as light source interference, vibration interference, etc., it is necessary to choose a grating product with corresponding anti-interference measures, which requires higher quality requirements for the safety grating sensor.

3. Pay attention to the selection and customization of safety grating sensors. Different equipment has different protection requirements, such as whether it is necessary to protect fingers, palms or arms, and different optical axis spacing needs to be selected when selecting the safety grating sensor with the same protection distance, and the smaller the optical axis spacing, the higher the accuracy.

Grating sensors can detect linear or angular displacements.

The signal of its measurement output is a digital pulse, which has the characteristics of large detection range, high detection accuracy and fast response speed. For example, Jinghuai judgment is often used in CNC machine tools to detect the coordinates of the knife and the workpiece, to observe and track the passing error, so as to play a role in compensating for the movement error of the tool.

Introduction: Grating sensor is a new type of sensor, which refers to a sensor that uses the principle of grating stacked grid stripes to measure distance. A so-called grating is a rectangular piece of optical glass with a number of equidistant parallel lines carved on it, and in general, the density of the engraved lines is about 10 to 100 millimeters.

The application of optical sensors is still relatively wide, so where are the optical sensors used in life? Here are some information about grating sensors, let's take a look.

It has been more than 200 years since the discovery of grating, and in 1978, a group of researchers at a communications research center in Ottawa, Canada, for the first time, had a magical effect in optical fibers doped with germanium quartz, the photosensitive effect. After discovering this effect, it was written by the standing wave at the time and made the world's first grating. After the nineteenth century, a technical research center in the United States made great progress in grating technology because of the unremitting efforts of these scientists.

At the same time, with the continuous progress of science and technology, the manufacturing technology of gratings is also constantly improving, and the application in various fields is also becoming popular.

Because gratings are made of optical fibers, gratings also have some characteristics of optical fibers, such as the refractive index of optical fibers to light will change with the spatial distribution of light intensity. Some of the sentences in this article are more complex and difficult to understand, but this is also a matter of no way, I hope you understand. A certain grating will be formed in the inner core of the optical fiber, and the so-called grating is actually something similar to a mirror.

Raster-type sensors are made using this feature. Instruments made using the grating principle have the following advantages: low additional losses, relatively small general volume and relatively large reflection range.

Here's how a raster sensor works. The ruler grating on the sensor moves with the indication grating, and when it reaches a certain distance, some light and dark stripes are formed on the ruler grating. These streaks hit the optoelectronics and move quickly.

In general, there are two types of optical paths for grating sensors, one is a reflective grating and the other is a projection grating. Grating sensors have a wide range of applications, and they are widely used in CNC machine tools, remote operation and some coordinate measuring mechanisms.

As far as the current situation is concerned, the development prospects of grating sensors are still very broad. Because of its small size, the encoder sensor is easy to carry and easy to place, and at the same time it is lightweight. Therefore, it is widely used in the aerospace field.

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The grating sensor is generally composed of 6 major parts.

1.Emitter: composed of several light-emitting devices, emitting infrared light;

2.Receiver: It is composed of a plurality of light-receiving devices, which accepts infrared rays and corresponds to the light-emitting devices of the transmitter one-to-one, forming a protective light curtain, generating a light and shading signal, and at the same time transmitting the signal to the controller through the signal cable to control the external equipment;

3.Controller: the signal processing unit, which provides power supply for the transmitter and receiver, and receives the light and shading signals transmitted by the receiver, generates output control signals, controls the brake control loop of the machine tool or the alarm device of other equipment, and realizes the machine tool stop operation or safety alarm;

4.Control cable: used to connect the controller with the machine tool and equipment to achieve the safety control of the machine tool or other equipment;

5.Signal cable state answer: used to transmit the signal between the controller and the luminaire and the light receiver;

6.Mounting bracket: fix the emitter and the light receiver on the machine to realize the up and down, left and right direction adjustment of the transmitter and receiver.