1. The PCB layout board touches the problem, and when the imitation signal is routed, the imitation signal is not wrapped with imitation, and it is even possible that the signal line and then directly go to the power line, which is easy to receive disturbances.
Solution: When it is a board, wrap the GND to imitate the signal line. If there is an analog GND and a digital GND, a separate articulation is required and cascaded using a 0 ohm resistor.
2. Principle design problems. The text wave of the power supply system of the collection chip that imitates the signal is too large, the filter circuit is not reasonable, the blocking circuit is not in place, and the filter circuit is not close to the device.
Solution: Ensure that the power supply voltage is close to the chip or sensor, and the filter circuit needs to be close to the chip or sensor;
3. The problem of device layout, if there is a corresponding wireless module such as 2G/4G/Wifi/nbio/zigbee and other communication modules, if the layout position is unreasonable during design, the wireless signal emitted by it will have a large amount of imitation, and it is more likely that the radiation will affect the power supply system of the single-chip microcomputer and the level of the reset circuit. Restart, shutdown, freeze and other undesirable phenomena occur.
Solution: If the antenna is a board antenna, the antenna perimeter needs to be hollowed out, the direction of radiation should be outward, the sensor and the transmission module should be placed separately, and the conditional sensor can be equipped with a shield.
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Classification and Principle of Resistive Sensors – BEBF
The resistive sensor and the corresponding measuring circuit are composed of force, pressure, weighing, displacement, acceleration, torque and other measuring instruments for metallurgy, electric power, transportation, petrochemical, commercial, biomedical and national defense departments to carry out automatic weighing, process detection and realize the automation of the production process.
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Introduction to the sensor model
Proximity Switches:
NBB2-12GM50-E2 NBB2-12GM50-E0 NBN4-12GM50-E2
NBN4-12GM50-E0 NBB5-18GM50-E2 NBB5-18GM50-E0
NBN8-18GM50-E2 NBN8-18GM50-E0 NBN15-30GM50-E0
NBN15-3 ...
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Industrial applications of rotary encoders
Rotary encoders are a class of sensors used to detect the angle of rotation and its derived mechanical parameters, including velocity and acceleration, etc., and can detect transmission movements such as rotation and linear lines. Due to its widespread use, rotary encoders convert mechanical inputs into electrical signals, which can be used by counters, tachometers, programmable...
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Precautions for P+F safety barriers
First, it is necessary to pay attention to the capacitive and inductive resistance of cables and field equipment, explosion-proof is the explosion-proof system, in addition to the need for P+F safety barriers to reach the required explosion-proof level, the energy storage of cables and field equipment is also a key issue. Especially after parametric certification replaces system certification, engineering companies are especially ...
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Precautions for the installation of single-point load cells – we are blessed
1. Single-point load cells should be handled with care, especially for small capacity sensors with alloy aluminum as elastomers, any vibration-induced impact or drop is likely to cause large output errors.
2. Design loading ...
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Precautions for pressure sensors – a blessing
1. Avoid scum deposited in the catheter and contact the transmitter with corrosive or overheated media.
2. When measuring the gas pressure, the pressure port should be opened at the top of the process pipeline, and the transmitter should also be installed at the upper part of the process pipeline, so that the accumulated liquid can be easily injected into the process.
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The steps of the use of the photoelectric switch
1. Self-conditioning. At the beginning of use, please check whether the switch itself is defective and whether the appearance is defective.
2. When using the EL130 photoelectric switch to avoid obstructions, some goods such as colored goods. Less reflective goods. Goods with large gaps between small pieces ...
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Anti-jamming technology for sensors – we are blessed
1. Shielding skills
Containers are made from metal materials. Wrapping circuits that require maintenance between them can effectively prevent the disturbance of electric or magnetic fields, which is called shielding. Shielding can be divided into electrostatic shielding, electromagnetic shielding and low-frequency magnetic shielding.
2. Electrostatic shielding
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How to identify the number of pulse positions in an encoder – we are blessed
The pulse encoder is a rotary encoder that uses the rotation pulse for signal output, and the main characteristics are the standard shape and diversified shape structure; The internal coding is stable, the signal output qiang, and the pulse value and positioning value are clear. Therefore, when choosing this type of punching encoder, ...
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Photoelectric switches for sensors
Photoelectric switches are what we generally call sensors. The definition of the sensor under the national standard GB7665-87 is: the equipment or device that can feel the specified measured parts and convert them into usable signals in accordance with certain rules, generally composed of sensitive elements and conversion elements.
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Sensor selection
The company is a company focusing on the development of mechanical motion control and sensing skills, and its products have the characteristics of high reliability, high accuracy and high protection, and play an irreplaceable role in the process of industrial production and mechanical manufacturing.
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Multi-axis force transducer action
The prevailing understanding of sensors is to transmit sensory information to the machine, the same type of sensor, transmit different sensory information, we also know that the senses are the organs that sense external things to stimulate the machine, such as our eyes, stomping and nose for the machine, the sensor can realize all the sensory information, so many axes ...
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The sensitive core structure of the accelerometer – we are blessed
The accelerometer is a sensor that can measure acceleration, this sensor can help the product to understand the environment in time, and it is very accurate, so what is the structure of its sensitive core?
1. Compression method: ...
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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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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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The right way to choose a torque sensor – we are blessed
With the gradual growth of demand for torque sensor shopping malls at that time, in recent years, manufacturers and brands producing torque sensors have shown a rapid upward trend.
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Classification and working methods of photoelectric sensors – we are blessed
1. Slotted photoelectric sensor
A light transmitter and a receiver are mounted face to face on either side of a slot is a fork photoelectric. The luminaire announces infrared or visible light, and the light receiver receives the light unobstructed. But when the object to be detected passes through the trough, the light is blocked ...
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The selection of proximity sensors follows the essentials – the blessing of the United States
For different raw material detection bodies and different detection intervals, different types of proximity sensors should be selected to make them have a high performance-to-price ratio in the system, for which the following principles should be followed in the selection:
1. When the detector body is a metal material: high-frequency oscillation proximity ...
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The choice of accelerometers – Beggar
1. Analog output or digital output:
The first thing to pay attention to is the case of the analog and digital outputs, which is important because it is the interface between the system and the sensor. In general, the voltage of the analog output is proportional to the acceleration. For digital outputs, pulse-width modulated signals are typically used ...
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Doujiafu helps intelligent robots to fight against the war
Now that the prevention and control of the new pneumonia epidemic has entered a critical period, how can it be useful to reduce cross-infection in hospitals and prevent the spread of the epidemic? Reduce the operational pressure of front-line medical personnel and help prevent and control the epidemic? All of them have become the key policies that have attracted wide attention. From long-distance medical care to intelligent robots ...
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