Simple fundamental characteristics and classification of miniature sensors
(1) As far as a single sensor is concerned, a miniature sensor refers to a small sensor from micrometer to millimeter and even nanometer, mainly using precision machining, microelectronics and microelectromechanical system skills to reduce the size of the sensor.
(2) In terms of integrated sensors, miniature sensors refer to integrated sensors composed of small sensitive elements, signal processors and data processing devices packed on a chip.
(3) As far as the sensor system is concerned, the micro sensor refers to the sensor system that not only contains micro sensors, but also micro actuators, which can work independently, or even be composed of multiple micro sensors, or can realize remote networks.
Peculiarity.
Small size and light weight. Low power consumption. Good performance. Mass production is convenient and the cost is low. Easy integration and multi-functionality. Improve the level of sensor intelligence.
Classify.
According to the physical properties of the measurement, the miniature sensors are divided into chemical miniature sensors, biological miniature sensors, physical miniature sensors, etc., and various typical miniature sensors are briefly introduced:
(1) Ion sensor - chemical type.
An ion sensor is a sensor that converts the activity of ions in a solution into an electrical signal. The basic principle is to selectively combine the sensing ions with ion identification data fixed on a sensitive membrane to change the membrane potential or membrane voltage to achieve the purpose of detection. Ion sensitors are widely used in chemical, pharmaceutical, food, bioengineering and other occupations.
(2) Gene sensor biotype.
GENE SENSORS FORM DOUBLE-STRANDED DNA (DSDNA) BY COMBINING A SINGLE-STRANDED DEOXYRIBONUCLEIC ACID MOLECULE WITH ANOTHER COMPLEMENTARY TARGET DNA, AND BY DISSECTING THESE ECHO SIGNALS, THE CHANGES IN THE HYBRIDIZATION PROCESS OR RESULT ARE CONVERTED INTO ELECTRICAL, OPTICAL, AND OTHER PHYSICAL SIGNALS. DNA sensors are also known as gene sensors.
(3) SAW sensor physical type.
SAW sensors are SAW skills and MEMS skills that convert various non-power information such as pressure, temperature, flow, magnetic field strength, acceleration, and angular velocity into changes in SAW vibration frequency.
|
More on that
|
The difference between optical fiber and photoelectric sensors – we are blessed
1. The definitions are different
Photoelectric sensor: A photoelectric sensor is a device that converts optical signals into electrical signals. Its principle of operation is based on the photoelectric effect. The photoelectric effect refers to the phenomenon that when light shines on certain substances, the electrons of the matter absorb the energy of photons and the corresponding electrical effect occurs ...
|
|
Introduction to laser encoders
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. Grating thousand-related method, where a laser of wavelength is projected on a periodic grating at a distance of p, ...
|
|
Classification of rotary encoders
There are two main types of encoders, incremental encoders and affirmative encoders. The incremental encoder reads the change in the viewpoint displacement, while the affirmative encoder reads the positive viewpoint of the encoding axis. They are done using three common skills, i.e., optical, mechanical, or magnetic.
...
|
|
There are three types of P+F proximity switches
P+F proximity switches can be divided into three varieties:
1. Capacitive proximity switch can detect metal and non-metal objects with an induction scale of 1-40mm
Capacitive proximity switches detect both metallic and non-metallic objects. ...
|
|
Auxiliary mechanical device installation form - 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 ...
|
|
Photoelectric sensor sensing mode – Doublebless
The pass-through beam device consists of an acceptor located within the line of sight of the transmitter. In this mode, an object is detected when the beam is blocked from the transmitter to the receiver.
The retroreflective device places the transmitter and receiver in the same direction, and uses the reflector to ...
|
|
Precise testing of load cells – we are blessed
Although the resistance strain gauge load cell itself is a solid, reliable and reliable electromechanical product, the following points should be taken into account when using it to ensure test accuracy:
1. Some "baffles" should be set around the load cell as much as possible, ...
|
|
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 ...
|
|
How to choose a pressure sensor fitting – we are blessed
There are not many single ferrule terminal joints on the market now, 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 double ferrule end fittings or single ferrule end fittings, are all selected.
|
|
Motor control requires encoders for reasons – and we are blessed
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 azimuth interface in the loop supplies the rotational speed and azimuth information to the controller ...
|
|
The selection of safety barriers
1) The operating voltage of the safety equipment connected to the safety barrier shall not exceed the maximum acceptable voltage of the safety barrier. Otherwise, it should be isolated from the system by using techniques such as optical resistance insulation, or using barrier safety barriers;
...
|
|
The role and classification of safety barriers
In electrical intrinsic safety explosion-proof, we generally divide the workplace into explosion-proof areas and non-explosion-proof areas. 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 PLC placed in the electrical cabinet in the non-explosion-proof area through wires.
|
|
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 ...
|
|
The functional principle of MPT
Optical ranging is based on the principle of triangulation. With this geometric approach, the interval from the sensor to the target can be accurately measured by changing the viewpoint within the triangle.
The super light source emits a beam to the target object, and then ...
|
|
A brief introduction to our sensors
Proximity sensors are a general term for sensors that replace contact detection methods such as limit switches and do not require contact detection of the detected object. It is capable of converting information about the motion and presence of objects into electrical signals. The detection method of replacing the electrical signal includes: using an electromagnetic induction bow to ...
|
|
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.
...
|
|
The correct way to test the output of the sensor – the sensor
1. Test for NPN output sensor
The NPN sensor output, also known as OC gate output, is based on the principle of open collector output of a transistor.
The principle of NPN type OC gate output is whether the output of the NPN transistor and GND are short-circuited. When the control is active, the transistor is turned on, the output and the GND ...
|
|
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 ...
|
|
Cable protection systems for harsh conditions
In many applications, there are certain safety requirements not only for the sensors in use, but also for the sensor cables. In order to ensure that the adapter components also meet these requirements, the new cable maintenance system provides the ambition for sensor adapters, cable conduits and cable glands ...
|
|
Accelerometer sensitivity deviation – a blessing
An accelerometer is an electronic device that measures the force of acceleration and converts it into a signal. It is possible to calculate the skew angle of the device relative to the horizontal plane, and analyze the equipment movement method through the analysis of dynamic acceleration. The requirements for sensitivity are very high, in fact, no matter what type ...
|
|
Contact
working hours
