German VAN DEN HEUVEL sensors, VAN DEN HEUVEL models, VAN DEN HEUVEL prices

VAN DEN HEUVEL sensors generally consist of 2 parts: the processing path and the processing elements. Their basic principle is based on the photoelectric effect, converting changes in the measured quantity into changes in optical signals, and then using photoelectric components to further convert non-electrical signals into electrical signals. The photoelectric effect refers to illuminating an object with light, which can be viewed as a series of photons with certain energy bombarding the object. At this time, the photon energy is transferred to electrons, and the entire energy of one photon is absorbed by one electron at once. After receiving the energy transmitted by the photon, the state of the electron changes, causing the corresponding electrical effect in the illuminated object. The photoelectric effect is usually divided into 3 categories: (1) The phenomenon where electrons escape from the surface of an object under the action of light is called the external photoelectric effect, such as in phototubes and photomultiplier tubes; (2) The phenomenon where the resistivity of an object changes under the action of light is called the internal photoelectric effect, such as in photoresistors and phototransistors; (3) The phenomenon where an object generates an electromotive force in a specific direction under the action of light is called the photovoltaic effect, such as in photocells.

VAN DEN HEUVEL sensor classification

The basic principle of multi-sensor information fusion technology is similar to the process of the human brain comprehensively processing information. It performs multi-level and multi-spatial information complementarity and optimized combination processing of various sensors, ultimately producing a consistent interpretation of the observed environment. In this process, multi-source data must be fully utilized for reasonable allocation and use. The ultimate goal of information fusion is to derive more useful information by combining information from multiple levels and aspects based on the separate observation information obtained from each sensor. This not only utilizes the advantages of collaborative operation among multiple sensors but also comprehensively processes data from other information sources to improve the intelligence of the entire sensor system. Pressure sensors are the most widely used type of sensor. Traditional pressure sensors are mainly mechanical structural devices that indicate pressure through the deformation of elastic elements. However, these structures are large in size and heavy in weight, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have emerged. They are characterized by small size, light weight, high accuracy, and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are moving towards miniaturization, featuring low power consumption and high reliability.

VAN DEN HEUVEL sensor installation precautions

1) Correct installation method: Verify the frequency response value of the pressure sensor using appropriate instruments under normal atmospheric pressure and standard temperature conditions. Verify the correctness of the pressure sensor code and the corresponding frequency response signal. 2) Determine the specific installation location: To determine the numbering and specific installation location of the pressure sensors, consider each inflation section of the inflation network. Pressure sensors must be installed along the cable, preferably at cable joints. Install no fewer than 4 pressure sensors on each cable. The two pressure sensors closest to the telephone exchange should be no more than 200m apart. Install 1 at each end of every cable. Install 1 at each branch point of the cable. If two branch points are close together (less than 100 m), only 1 needs to be installed. Install 1 at points where the cable laying method (overhead, underground) changes. For cables without branches, since the cable type is consistent, the installation spacing of pressure sensors should be no greater than 500m, and the total number should be no less than 4. To facilitate the identification of pressure sensor fault points, in addition to installing a pressure sensor at the starting point, install 1 additional sensor(s) at a distance of 150~200m from the starting point. Of course, economic and technical factors must be considered in the design; pressure sensors should not be installed where they are not needed.

VAN DEN HEUVEL sensor applications

Pressure sensors are mainly applied in fields such as booster cylinders, boosters, gas-liquid booster cylinders, gas-liquid boosters, presses, compressors, and air conditioning refrigeration equipment. 1) Application in hydraulic systems: In hydraulic systems, pressure sensors are primarily used to complete closed-loop force control. When the control valve spool moves suddenly, peak pressures several times the system operating pressure can form within a very short time. In typical mobile machinery and industrial hydraulics, if such extreme conditions are not considered during design, any pressure sensor will be damaged quickly. Shock-resistant pressure sensors are required. There are mainly 2 methods for achieving shock resistance in pressure sensors: one is to change the strain gauge chip, and the other is to use an external coil. The first method is generally adopted in hydraulic systems, mainly because it is easier to install. Another reason is that the pressure sensor must withstand continuous pressure pulsations from the hydraulic pump. 2) Application in safety control systems: Pressure sensors are frequently used in safety control systems, mainly targeting the safety management systems of air compressors themselves. There are many sensor applications in the field of safety control. As a very common sensor, the application of pressure sensors in safety control systems is not surprising. Applications in the safety control field are generally considered from aspects of performance, price, and operational safety and convenience. Practical evidence shows that the effect of selecting pressure sensors is very good. Pressure sensors use machining technology for mechanical equipment to mount components and signal conditioners on a small chip. Therefore, small size is one of its advantages. In addition, low price is another major advantage. To some extent, it can improve the accuracy of system testing. In safety control systems, installing pressure sensors in the pipeline equipment at the air outlet controls the pressure brought by the compressor to a certain extent. This serves as a protective measure and is a very effective control system. After the compressor starts normally, if the pressure value does not reach the upper limit, the controller will open the intake port and adjust to bring the equipment to maximum power. 3) Application in injection molds: Pressure sensors play an important role in injection molds. Pressure sensors can be installed in the nozzle of the injection molding machine, hot runner systems, cold runner systems, and mold cavities. They can measure the plastic pressure at a certain point from the nozzle of the injection molding machine to the mold cavity during the processes of injection, filling, holding pressure, and cooling. 4) Application in monitoring mine pressure: Sensor technology is one of the key technologies for mine pressure monitoring. On one hand, we should correctly apply existing various sensors to serve the mining industry; on the other hand, sensor manufacturers must research and develop new types of pressure sensors to adapt to more mining industry applications. There are various types of pressure sensors. Due to the special environment of mine pressure monitoring, mine-used pressure sensors mainly include: vibrating wire pressure sensors, semiconductor piezoresistive pressure sensors, metal strain gauge pressure sensors, and differential transformer pressure sensors. These sensors have wide applications in the mining industry. The specific type of sensor to use depends on the specific mining environment. 5) Application in compressors and air conditioning refrigeration equipment: Pressure sensors are commonly used in air compressors and air conditioning refrigeration equipment. These sensor products are compact in shape and easy to install. The pressure guide ports generally adopt a specialized valve needle design.

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