Infrared sensors include an optical system, a detection element, and a conversion circuit. Optical systems can be divided into two categories: transmissive and reflective according to different structures. According to the working principle, the detection element can be divided into thermal detection element and photoelectric detection element. The most widely used thermistors are thermistors. When the thermistor is exposed to infrared radiation, the temperature rises, and the resistance changes (this change may become larger or smaller, because thermistors can be divided into positive temperature coefficient thermistors and negative temperature coefficient thermistors), and through the conversion circuit, they become electrical signal outputs. Photosensitive elements are commonly used in photoelectric detection components, which are generally made of materials such as lead sulfide, lead selenide, indium arsenide, antimony arsenide, mercury cadmium telluride, germanium and silicon doped.
Infrared sensors are commonly used for touchless temperature measurement, gas composition analysis, and non-destructive testing, and are widely used in the fields of medicine, military, space technology, and environmental engineering. For example, the use of infrared sensors to measure the surface temperature of the human body from a distance can detect abnormal temperature parts and timely diagnose and treat diseases (see thermal imager); The use of infrared sensors on artificial satellites to supervise the Earth's clouds enables large-scale weather forecasting; Infrared sensors can be used to detect overheating of engines running on aircraft, etc.
Telescopes with infrared sensors can be used in military operations, woodland warfare to survey the enemy in dense forests, and urban warfare to explore the enemy behind a wall, all of which use infrared sensors to measure the surface temperature of the human body and know where the enemy is.
Types of infrared sensors
Infrared sensors can be divided into the following types according to their actions:
1. Convert part of the infrared into heat, and use the heat to extract the output signal such as the change of resistance value and electromotive force.
2. The use of semiconductor migration phenomenon to absorb the photoelectric effect of energy difference and the use of quantum type due to the photoelectromotive force of PN bonding.
The thermal phenomenon is commonly known as the scorching effect, and the most representative of them are thermal bolometers, thermopiles and pyroelectric elements.
Thermal infrared sensor
Advantages: It can be operated at room temperature, wavelength dependence (there is a great change in the sensitivity of different wavelengths) does not exist, and the cost is cheap;
Defects: low sensitivity, slow response (mS spectrum).
Quantum infrared sensor
Strengths: high sensitivity, fast response (μS spectrum);
Defects: must be cooled (liquid nitrogen), wavelength dependent, high price;
Infrared sensors, in particular, use far-infrared scale sensitivity for human detection, and the wavelength of infrared rays is longer than visible light and shorter than radio waves. Infrared rays are emitted only by hot objects, but in fact they are not, but all objects that exist in nature, such as humans, fire, ice, etc., all emit infrared rays, but their wavelengths vary depending on the temperature of the object.
|
More on that
|
Ottonix sensor type
Sensors are the most fundamental and commonly used components in automation systems. Autonex offers a wide range of sensors including proximity switches, photoelectric sensors, fiber optic sensors, and pressure sensors, which are committed to maximizing the user's work efficiency.
...
|
|
Causes and solutions for overheating or burning of AC contactor coils
Reasons: 1. The polar surface of the communication core is uneven or the demagnetization air gap is too large;
2. The double coil of DC operation derived from the communication contactor is overheated due to the fact that the normally closed interlocking contact is not released by welding;
3. The frequency of operation is too high;
4. Poor coil manufacturing or due to mechanical damage, absolute ...
|
|
Autotonicus photoelectric switch measurement method
1. Measurement of action distance; When the action piece is close to the sensing surface close to the switch from the front, the distance close to the switch action is the action distance close to the switch, and the measured data should be within the parameters of the product.
2. Measurement of release distance
|
|
Autonex SFC series safety controllers
The SFC series of safety controllers can be used with safety input products (switches, sensors, etc.) and satisfies the self-diagnosis function and safety integrity required by safety standards. In addition, the slim design saves space in the installation and allows for the use of screwed/screwless pushes for wiring connections.
|
|
Ultrasonic flow sensor principle
Ultrasonic flow sensor is a new type of general-purpose time-difference multi-function ultrasonic sensor suitable for industrial environments, mainly using low-voltage multi-pulse balanced emission acceptance technology, which can be mainly applied to measure the flow of most clean and uniform liquids without large concentrations of suspended particles or gases.
|
|
Position sensor key term – Ottonix
Incremental sensors
Only bearing change information is provided so that the practice bearing is unknown at startup. Each time the index is made/marks the zero or zero bit of the signaling community. Detected in the homing procedure. Regarding the commutation of brushless motors, motors generally have three magnetic Hall sensors, which are ...
|
|
Principle and application field of Ottonix panel table
Panel meter, also known as the dial table or meter head, the full name is the panel device instrument (panel device instrument), English Panel Meter. Because this kind of instrument device is fixed on the surface of the equipment for viewing and operation, it is called a panel table, which is a functional part of the screen equipment.
...
|
|
Autonicus Safety Touchless Door Switches SFN Series
The SFN series of safety non-touch door switches reliably monitors the opening and closing of dedicated actuator doors by means of magnetic detection. This product can be connected to up to 30 units through a dedicated controller, and it can be used vertically and horizontally according to the installation environment, which improves the ease of use.
...
|
|
Torque Transducer Classification – Ottonix
Torque sensor is the necessary device in some products, mainly used to measure the speed and point of view, but different types of sensors, the use of methods and effects are different, so what are the classifications of torque sensors?
...
|
|
Advantages and disadvantages of Ortonix products in the market
First, the standard scale of the busway Ottonix products in the shopping mall:
1. The products produced are all accessories products commonly used in industry, and they are widely applicable.
2. The product quality is stable, the production and the inspection are regular. Compared with domestic products, the stability of the product function ...
|
|
How to install an Autotonics voltage sensor
Voltage sensor refers to a sensor that can sense the measured voltage and convert it into a usable output signal, in a variety of detection and control systems, it is often necessary to track and collect the communication DC voltage signal that changes at high speed, and do spectrum analysis on some more complex voltage waveforms. Voltage Sensors ...
|
|
Otonic photoswitch determination
1. Measurement of action distance; When the action piece is close to the sensing surface close to the switch from the front, the distance close to the switch action is the action distance close to the switch, and the measured data should be within the parameters of the product.
2. Release distance ...
|
|
Autonics BH series photoelectric sensors
The BH series photoelectric sensors can be used with M18 fixing nuts and fixing nuts for frontal equipment, or with M3 bolts and nuts for peripheral equipment. Sensitive equipment options promise easy application in a variety of industrial environments. The sensor can be equipped with a simple wire to generate individual or simultaneous N...
|
|
Autonex launches a new product - multi-channel pressure sensor PSM series
The multi-channel pressure indicators of the PSM series can display the measured values of up to 4 or 8 channels of analogue pressure sensors. When used in conjunction with our PSS series pressure sensors, the sensor type, pressure type and range can be automatically recognized without additional settings. Users can also easily ...
|
|
Gas Sensor Failure Analysis – Ottonix
A gas sensor is a converter that converts the volume fraction of a gas into an electrical signal. We will inevitably encounter some problems when using gas sensors, and we have analyzed them as follows:
1. How long does it take for the gas sensor to be used and then calibrated again: the initial calibration ...
|
|
How to choose a pressure sensor fitting – Ottonix
At present, there are not many single ferrule terminal joints on the market, and most manufacturers are using double ferrule terminal joints, and the market price is about 9-18 yuan, and the price is different according to different types. Fittings, whether they are double ferrule end fittings or single ferrule end fittings, are all ...
|
|
Autonex BD series laser displacement sensors
BD series laser displacement sensor can measure the thickness, width, horizontal difference, parallax, twist and flatness of the target object by detecting the displacement.
Regardless of the color or data of the policy, the sensor can provide accurate and stable measurement results. Sensor head and amplifier unit ...
|
|
Precautions for the use of through-beam photoelectric sensors - Autonex
1. Avoid strong light sources
Photoelectric sensors can generally operate stably when the ambient illumination is high. However, avoid facing the optical axis of the sensor with strong light sources such as sunlight and incandescent lamps. When the angle of the optical axis of the sensor (light receiver) and the strong light source cannot be changed, the sensor can be surrounded by ...
|
|
Advantages of digital torque sensors – Autotonics
In the rotary power system, the most frequently involved parameter: rotational torque, in order to detect the rotational torque, the traditional use of torsion angle phase difference sensors. The more mature detection method of torque testing is strain electrical testing skills. It has high precision, fast frequency response, good reliability, long life, etc.
|
|
Sensors commonly used in industrial robots
In the field of industrial automation, machines need sensors to provide the necessary information to perform the relevant operations correctly. Robots are now using a number of sensors to improve their adaptability. For example, there are many cobots that integrate torque sensors and cameras to ensure that they are equipped with torque sensors and cameras during operation.
|
|
Contact
working hours
