Encoder: Laser encoder is a general term for encoders with laser as the light source. According to the published material, the principle can be broadly divided into two types, namely the use of the grating method and the use of the Fourier image method. In the grating thousand-case method, the wavelength laser is projected on the periodic grating with a distance of p, and the linkage occurs in the direction of the confirmed viewpoint, and these diffracted lights are involved with each other, and this method is a method for detecting and processing the intensity of the thousand-touch fringes. If a periodic grating moves in the direction of its array, the intensity of the diffracted light does not change, but the phase changes. An interferometer is formed to detect this phase change. For the interference of the m-order diffraction light from the periodic grating.
Now, if you use a ± 1-order latched light, you only need to move 1 grid distance to get a 2-cycle sine wave output, which doubles the resolution. If the earth is used for grade 2 diffraction light, the resolution becomes 4 times, but if a general amplitude grating is used, the amount of light will be much lower than when the light is staged at the 1st level, because the laser is incident at the diffraction angle to the grating. , so the reflected diffracted light returns in a straight direction and is reincident on the grating through the reflective optical system, constituting a second diffraction. This structure allows the grating to obtain a sine wave of 4 cycles for every 1 grid distance moved, which can constitute 4 times the high resolution.
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A common problem with the failure of pressure sensors – our sensors
First, the problem of the pressure sensor sealing ring
If the output of the pressurized transmitter does not change, and the output of the pressurized transmitter changes suddenly, and the zero position of the pressure relief transmitter cannot be returned, it is likely that the problem of the pressure sensor sealing ring. It is common because of the standard reason of the sealing ring, the sensor is tightened ...
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Precautions for installation during the use of encoders
First of all, the following points should be paid attention to when wiring the encoder:
1. It is necessary to use a metal cable bracket and ensure that the bracket connection is connected to the ground;
2. The cable should be arranged as close to the metal parts as possible, such as control cabinet panels, beams and metal rails, etc.
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The wiring of the load cell – we are responsible
Load cells can be wired in two different input and output ways:
One is the four-wire connection method
The load cell of the four-wire connection method has no special requirements for the secondary instrument panel, and the time and time of use are very convenient, but when the cable is long, it is very simple to be affected by the working temperature.
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The role and classification of safety barriers
In electrical intrinsic safety explosion-proof (abbreviation: intrinsically safe explosion-proof), we generally divide the workplace into explosion-proof area and non-explosion-proof area. There is the transmission of electrical energy between the explosion-proof area and the non-explosion-proof area, for example, the switches, buttons, sensors, etc. in the explosion-proof area are connected to the non-explosion-proof area through the wires.
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Auxiliary mechanical device installation method - double blessing
Auxiliary mechanical devices: commonly used are rack and pinion, chain belt, friction runner, rope reeling machinery, etc.
Low-speed end device: installed behind the reduction gear, such as the shaft end of the winch wire rope drum or the shaft end of the next reduction gear ...
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Understanding sensor accuracy – a blessing
There are three goals of precision: precision, correctness, and precision.
precision
It sheds light on the sloppy nature of the measurement results. That is, for a certain stable goal (to be measured) by the same measurer ...
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Analysis of the use of various types of accelerometers
There are two types of accelerometers: one is the angular accelerometer, which is improved from gyroscopes. The other is a linear accelerometer. It can also be divided into single-axis, dual-axis and three-axis accelerometers according to the measurement axis.
At the moment, accelerometers are widely used in game controls.
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The difference between fiber optic sensors and photoelectric sensors – we are blessed
Optical fiber sensor and photoelectric sensor are two typical sensors, which are widely used in production and measurement, so what is the difference between the two?
Fiber optic sensor skills are developed on the basis of fiber optics, optical communications, and optoelectronic skills, and electromagnetic...
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The new WIS2 wireless sensing system is available
The use of robots that can exchange things requires high-speed movement and fast rotation. Conventional solutions for energy chains or slip rings lack the necessary flexibility with regard to this automation technology. Our wireless sensing system (WIS) enables non-contact in places where a fixed connection is not possible.
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The UHF F190 and F192 series readers are launched on the market
With the rapid development of automation technology, what kind of RF identification skills can be called "cutting-edge"? Reliable identification + seamless data transmission + continuous system operation, these three points are indispensable, and the UHF F190/F192 series launched by Bejiafu is a combination of many advantages. On a global scale ...
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Benefits and features of our industrial sensors
The R2 and R3 series of photoelectric sensors are impressive products that characterize a very small housing plan. Robust R2/R3 miniature photoelectric sensors – smaller than a matchbox, space-saving miniature housing photoelectric sensors R2/R3 series ...
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We made a wonderful appearance at SIAF 2022
The 2022 Guangzhou World Industrial Automation Skills and Equipment Exhibition (SIAF) landed at the China Import and Export Fair Complex on March 3, kicking off the prelude to this year's industrial automation career exhibition. As the driver and innovator of Industry 4.0, we continue to provide customers with the future of the future.
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Terminology for the selection of pressure sensors – we are blessed
Pressure: The force acting vertically and evenly over a unit area. In physics, this is called "pressure".
Range: i.e. the scale of pressure. Refers to the use of sensors to measure the amount of pressure.
Medium: refers to the object to be measured. Generally steam, water, oil, acid, alkali or mixture.
Precision...
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Static and dynamic characteristics of sensors – we are blessed
1. Static characteristics of the sensor
The static characteristics of a sensor are related to the static input signal, the output and input of the sensor. Since the input and output are moment-independent at this point, the connection between them (i.e., the static properties of the sensor) can be used in an algebraic equation without time variables.
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Important features of our sensors
On the linear scale of our sensors, the higher the sensitivity, the better. Because only when the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is conducive to signal processing. However, it should be noted that the sensitivity of the sensor is high, and the external noise that is not related to the measurement is also simple.
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P+F precautions for the use of safety barriers
The safety barrier, also known as the safety energy limiter, is an important part of the intrinsic safety system. There are two main types of safety barriers: P+F Zener barriers and P+f barrier barriers. The core components of the Zener barrier are Zener diodes, current-limiting resistors and fast fuse wires.
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Our basic sensor detection method
1. Proximity sensing.
Proximity usually refers to exploration:
a. Whether the target exists.
The scale or abbreviated shape of an object.
Proximity sensors can be divided into touch, non-touch, and imitation. The choice of sensor depends on physical, environmental, and control conditions.
Machine...
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Selection criteria for proximity switches
Points to note in the selection of proximity switches
1. The working voltage of the proximity switch output is selected, generally DC type DC24V or AC AC250V optional;
2. Proximity switch output method selection, generally NPN-normally open, NPN-...
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A common way to detect the level of liquids – we are blessed
In order to select the best liquid level sensor, we need to understand not only the characteristics and conditions of the liquid to be measured, but also the advantages and limitations of different detection methods, and then we can select the most suitable sensor. Here are some of the most common inspection technologies on the market today.
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Precautions during the installation of safety barriers
1. The safety barrier should be installed in a safe place, and the environmental conditions meet the requirements of the "application conditions" in the "Safety Gate Selection Sample".
2. The connecting wires of the intrinsically safe end (blue end) and non-intrinsically safe end circuits of the barrier safety barrier should be laid separately in the wiring slot.
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