The motor control loop is mainly composed of a motor, a controller, and a directional response interface. The motor rolls the rotating shaft and drives the robotic arm to move. The motor manipulator controls when the motor applies force, stops, or continues to roll. The bearing interface in the loop supplies speed and bearing information to the controller. In order to obtain this accurate information about the rotating target, azimuth detection is very important in motor control.
The orientation detection in the motor control system usually includes: micro-motor solution components, photoelectric components, magnetosensitive components and electromagnetic induction components. Because the measurement accuracy of the photoelectric element is high, it can accurately reflect the mechanical orientation of the rotor of the motor, so the photoelectric encoder is particularly common in the use of motor control.
The operating principle of an incremental optical encoder
The incremental photoencoder is composed of a light source, a lens, a code disc, a fixed grating, a photosensitive element and an electronic circuit, and the incremental photoencoder can detect the orientation and speed of the motor. Its operating principle is to rotate the code disc with uniform narrow slit in the radial direction driven by the rotation axis rolling, and there are two narrow slits with 90° phase staggered from each other on the fixed grating, and there is a photodiode to receive the signal transmitted by the code disc.
During operation, the grating does not move, the disc rolls together with the hinge, and the light announced by the light source is projected onto the disc and the grating. When the opaque area on the code disc is exactly aligned with the transparent narrow slit on the fixed grating, the light is completely blocked, and the output voltage of the photoelectric converter is the smallest. When the transparent area on the code disc is exactly aligned with the transparent narrow slit on the fixed grating, all the light passes through, and the output voltage of the photoelectric converter is maximum. The photoelectric converter will output an approximate sine wave voltage every time the disc is rotated, and the phase difference of the output voltage of photoelectric converters A and B is 90°.
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Precautions for the installation of linear displacement sensors – we are blessed
1. The linear displacement sensor should be used to prevent over-travel in the application, and a certain margin should be left in the selection to facilitate the use of the device.
2. The linear displacement sensor device is fixed by a bracket, and then the follow-up shaft is connected to the moving object to be measured. When the sensor is fixed in the device, it can be ...
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Applications for capacitive sensors – we are blessed
Capacitive sensors have the advantages of simple structure, high temperature resistance, radiation resistance, high resolution, and good dynamic response characteristics, and are widely used in the measurement of pressure, displacement, acceleration, thickness, vibration, liquid level, etc. However, it is necessary to pay attention to the following aspects in the application of the influence on the measurement results:
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A brief introduction and selection of encoders
One. First of all, we need to have a brief understanding of rotary encoders
Rotary encoders can be used to measure rotational velocity, acceleration, azimuth and direction. Encoders can be used in a wide range of mechanical engineering occupations, such as material handling, logistics and packaging.
In the field of industrial automation ...
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Wiring of weighing strain gauge tension and compression sensors – we are in control
Strain gauge tension and compression load cells are available in two different input and output wiring methods:
The first 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 it is very convenient to use, but when the cable is long, it is easy to be shaken by the operating temperature.
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Introduction of photoelectric switches for sensors
Photoelectric switches are what we generally call sensors. **Standard GB7665-87 defines a sensor as: a device or device that can sense the specified measured part and convert it into a usable signal in accordance with certain rules, which is generally composed of a sensitive element and a conversion element.
The sensor is a ...
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Wireless HART technology for industrial processes
WirelessHART uses the 2.4 GHz band (which is no-nonsense and globally) as a transmission medium for a variety of radio skills, including WLAN, Bluetooth, and ZigBee. However, WirelessHART is more than just a variant of WLAN.
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Pressure Transmitter Verification Regulations
A pressure transmitter is a type of instrument that converts a pressure variable into a consistent output signal that can be transmitted, and there is a given continuous function relationship between the output signal and the pressure variable, which is generally a linear function. Pressure variables include positive and negative pressure, differential pressure and pressure. Pressure transmitters are available in electric and ...
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Eltra Incremental Rotary Encoder Types
Eltra incremental encoders fall into three categories:
Optical solid shaft incremental encoder Eltra. The couplings in these types are made of solid shafts.
· EL-ER 30 E/H；
· EH 38 A/B/D；
· EL-E ...
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The main role of the encoder is explained - double blessing
An encoder is a device that converts angular or linear displacement into an electrical signal. The former becomes the yardstick, and the latter is called the yardstick. According to the readout method, the encoder can be divided into two types: touch type and non-touch type. The touch type selects the brush output, and a brush touches the conductive area or the insulating area to represent the shape of the code.
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Introduction to the application of the tracking system
The Finder and the Finder are in use in the automotive industry for the first time, and a variety of ways to use them are proposed:
RFID is commonly used in the automotive industry for tracking and traceability. There is a growing demand for customized treatment solutions.
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The F99 series inclination sensor helps "China speed"
During the epidemic, Huoshenshan Hospital, which rose from the ground within 10 days, made foreign netizens exclaim miracles. This is a life-and-death contest against the epidemic, and it is also a speed that Chinese are proud of. Behind the "China speed", advanced construction equipment is indispensable, in which the project ...
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How to install the safety barrier
1. The safety barrier should be installed in a safe place, and the environmental conditions meet the requirements of "application conditions" in the "Safety Barrier 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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Engineered Vibration Sensor Test Methods – Blessing
In the field of engineering oscillation testing, there are various test methods and methods, but they can be divided into three categories according to the measurement methods of various parameters and the physical properties of the measurement process.
1. Mechanical quizzes
Will the works oscillate ...
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Features of image sensors – a blessing
Picture sensor is an extremely useful product, which has gradually attracted the favor of shopping malls with its strong sensitivity and speed.
The use of picture sensors in daily life is undoubtedly a digital camera product, and its development speed can be described as changing with each passing day. At...
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Analysis of the use of P+F encoders
1. Grating pollution This will reduce the signal output amplitude, and the oil must be quietly wiped off with absorbent cotton dipped in anhydrous alcohol.
2. Encoder connection cable failure: the probability of this fault is high, and it is often encountered in maintenance, so it should be a priority element. Generally, the encoder cable is broken ...
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The application of P+F sensors
Positioning, Navigation, Sorting...... The completion of various functions of mobile robots can be said to be inseparable from the role of sensors, and with the continuous expansion of the scope of use of mobile robots, the environment they face is more complex and diverse, and the requirements for sensors are also constantly improving.
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Inclination sensor application industry – we are blessed
Marine geography
Landslides, avalanches -- Dual-axis skew sensor with liquid level sensor for landslide or avalanche monitoring, through wireless data transmission to the central control system, real-time monitoring of mountain conditions, can effectively reduce the damage caused by landslides.
Construction
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The special safety barrier base plate for the H series dark horse system
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Safety barriers are available in a variety of applications
In the process of using the safety barrier, whether it is the construction stage or the daily maintenance, repeated removal of the suture is a troublesome and simple mistake. With pluggable terminals, there is no need to repeatedly disconnect the wires. The field side terminals of the safety barrier and the system side terminals are distinguished by different colors, if there are two sets of ...
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Displacement sensor failure solution - double blessing
(1) Electronic ruler
When the electronic ruler is used to a certain moment, in the face of aging problems, we should pay attention to the fact that if the seal is now aged, and there are many impurities, water mixtures and oil, then it will affect the touch resistance of the brush, resulting in the continuous beating of the displayed numbers.
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