Proper use and maintenance of high temperature melt YLE Crank Position Sensors

High temperature melt pressure sensor is mainly in the high temperature fluid medium pressure measurement and control, mainly used in rubber machinery, polyester and other equipment, in which an important role. Therefore, the correct use and maintenance became known as the operation staff. Damage to correct installation usually high temperature melt pressure transducers are due to its installation position inappropriate caused. If the sensor to installation in the small hole or irregular shape of Kong Zhong, Crankshaft Position Sensorsit is possible to cause vibration membrane sensor has been damaged by the impact. Select the appropriate tools to process the mounting hole, is helpful to control the installation hole size. In addition, mounting torque suitable to form a good seal. But if the installation torque is too high and is easy to cause the detachment of high temperature melt pressure sensor, in order to prevent the occurrence of this phenomenon, usually in the sensor is installed before the threaded portion with anti off compounds. In the use of such compounds, even if the installation torque sensor is very high, is also very difficult to be moved. Check the installation hole size if the installation hole size doesn't fit, high temperature melt pressure sensor in the installation process, the threaded portion of it is susceptible to wear. This will not only affect the sealing performance of equipment, but also makes the sensor can not fully play its role, and even may cause security risks. Mounting holes are suitable only to avoid the thread wear, usually by mounting hole measuring instrument to detect the mounting holes can be, in order to make the appropriate adjustments. Select the appropriate position when the installation Engine Water Temperature Sensor of high temperature melt pressure sensor is too close to the line, not the molten material may wear sensor at the top; if the high temperature melt pressure sensor is installed in too on the location, the stagnation region between the high temperature melt pressure sensor and screw rod stroke may produce melt materials, melt where possible degradation, pressure signal may also transfer distortion; if the high temperature melt pressure sensor too deeply into the machine barrel, screw may be in the rotation process touch the high temperature melt pressure sensor at the top of the damage caused by. In general, the barrel temperature melt pressure sensor can be located in front of the screen, melt pump before or die. Keep mounting hole mounting hole cleaning to keep clean and prevent frit blockage to ensure the normal operation of equipment is very important. Before being clean extruder, melt pressure sensor all should be removed from the barrel to prevent damage. In the dismantling of the sensor, the melt may flow into the mounting hole and hardened, if the melt these remains have not been removed, when installing the high temperature melt pressure sensor again it may cause the top damage. A cleaning tool package to the melt residue removal. However, the cleaning process repeated may deepen the damage of high temperature melt pressure sensor mounting holes caused by. If this happens, we should take measures to increase the high temperature melt pressure sensor in the mounting hole position. To avoid low interference in the extrusion process, the plastic raw materials, from the solid to the melt state shall have adequate "soak time". If the extruder at the start of a pre production has not yet reached operating temperature, so the high temperature melt pressure sensor and the extruder will be a certain degree of damage. In addition, if the high temperature melt pressure sensor was removed from the extrusion machine cold, material may damage caused by vibration membrane adhesion in a high temperature melt pressure sensor at the top. Therefore, before removing the high temperature melt pressure sensor, should confirm the barrel temperature is high enough, the material inside the machine barrel in softening state. Carefully clean
In the cleaning of the extruder barrel with a wire brush or special compounds, high temperature melt pressure sensor should be all removed. Because of the vibration film the two cleaning methods may cause high temperature melt pressure sensor damage. When the tube is heated, should also be high temperature melt pressure sensor is removed and a soft cloth to wipe the top wear no holes, and high temperature melt pressure sensor also need to use the drill guide sleeve clean and clean. Keep dry despite the circuit design of high temperature melt pressure sensor can withstand the harsh environment of the extrusion processing, but the majority of high temperature melt pressure sensor is not absolutely waterproof, in the humid environment is not conducive to the normal operation of. Therefore, to ensure the water cooling device of extruder barrel of water will not leak, otherwise it will cause adverse effects on the sensor. If the sensor to exposure to water or damp environment, should choose a strong special high-temperature melt pressure sensor water repellency. To prevent the pressure overload even overload design sensor measurement range of the highest can reach 50% (beyond the ratio of the maximum range), from the viewpoint of safety equipment operation should be considered to avoid risks, the best choice of the measured pressure in the high temperature melt pressure within the sensor range. In most cases, the best range of selected high temperature melt pressure sensor should be 2 times the measured pressure, so that even if the extruder operating at extremely high pressure, can also avoid the damage of high temperature melt pressure sensor.

Proximity Sensor Selection Tips

Ground sensor applications has been particularly broad application of its model , different functions are also different, its main feature is the small size, easy toinstall, inexpensive , how do we determine what you want to do a proximity sensor to specifically look . First ,
the proximity sensor according to the measured object by selecting the material . If the required sensing distance is shorter , inductive proximity sensors can be easily and efficiently detect any type of metal objects. If the distance , you can use the photoelectric Camshaft Positioning Sensor. If the sensor is very far away , it is best to use on the radio or reflective photoelectric sensors. Secondly, since the capacitive proximity sensor can detect the material is very much, but the sensing distance corresponding to recently, and inductive proximity sensors similar . If you use a capacitiveCrankshaft Sensors , then the volume of the object to be detected can not be too small to meet the minimum sensing object of the sensor volume requirements. Ultrasound and diffuse proximity sensors can detect a wide range of materials , and detection distance is relatively long . However, in the detection of objects with irregular surfaces may cause problems . Finally , and more for the proximity sensor selection criteria , or to rely on the characteristics of the measured object , and to take
into account Crankshaft Positioning Sensor installation and environmental factors . Once all these issues are clear , then it can be selected from a number of sensors a suitable type. Understanding of the proximity sensor selection step that we can more quickly and accurately selected their own needs sensors. Of course, this is just a selection procedure , to treat specific problems but also specific coping

Modular throttle position sensor

Modular throttle position sensor(A) structural features modular TPS Toyota car uses modular throttle position sensor as shown in Figure 2-35a, the principle of the circuit shown in Figure 2-35b. It mainly consists of a variable resistor and the sliding contacts, throttle shaft, idle contact, shell composition. Variable resistor film resistor formed on Crankshaft Sensor board, the variable resistor wiper rotates together with the throttle shaft, sliding arm connected to the output terminal VTA. (2) Combined Combined TPS TPS output characteristics of the output characteristics shown in Figure 2-36. When the throttle is closed or opening is less than 1.2. When the idle contact is closed, its output terminal IDL output low (0V); when the throttle opening is greater than 1.2. When the idle contact is disconnected, the output terminal IDL output high (5V). When the throttle opening change, the variable resistor wiper will immediately rotate the throttle shaft, will be in sliding contact arm slides on film resistor, the Position Sensor output terminal VTA and E, the signal voltage between the ensuing change, as shown in Figure 2-35, the greater the throttle opening degree, the higher output voltage. The linear sensor output signal after A / D converter into a digital signal and then enter the ECU.

Contact switch type throttle position sensor

Contact switch type throttle position sensor( A ) structural features contact switch type TPS Throttle Position Sensor type contact switch (TPS) mainly by the throttle shaft , heavy duty contacts [ also known as power contacts (PSW)], cams, idle contact (IDL ) and wiring socket components. The cam follower throttle shaft , the throttle shaft with the rotation of the throttle opening degree size .
 2 ) contact switch type TPS output characteristics of the contact switch type throttle position sensor output characteristic shown in Figure 2-34 . When the throttle is closed , idle contact is closed , the power contacts (PSW) is disconnected, idle contact output terminal of the signal is low , " 0" , the power contacts (PSW) output terminal of the signal is high Ping "l". ECU receives two input signals TPS , if the vehicle speed Motor Sensors input signal indicates the ECU speed is zero , then the ECU determines the engine is idling and increased fuel injector fuel injection quantity control to ensure stable engine idle speed without stalling . If at this time the ECU speed sensor input signal indicates the speed is not zero , then the ECU determines the engine is decelerating state and control fuel injection is stopped to reduce emissions and improve economy . When the throttle opening increases , the cam shaft with the throttle open and the top contact idle , power contacts (PSW) is left open , IDL terminal outputs HIGH "1", PSW pin output is also high level "1 ." Two high-level ECU receives the signal, it is determined that the engine is part of the load state where the ECU based on the crankshaft Auto Temperature Sensor signal and the air flow speed signal calculated and determined amount of fuel injection , the engine main guarantee economy and emissions performance.When nearly all of the throttle opening ( 80% load) , the cam rotation of the power contacts (PSW) is closed , PSW terminal outputs low level "0", IDL kept open and the output terminals of the high level "1 ." ECU receives the two signals, it is determined that the engine running at high load condition , thereby controlling the fuel injector to increase fuel injection quantity, to ensure sufficient engine output power , it will be called the power contacts contact a large load .

When full throttle , ECU will control the system into open-loop control mode, then do not use the oxygen Positioning Sensor signal. If the car air conditioner is working at this time , then the ECU will interrupt the air conditioner main relay signal for approximately 15s, to cut off the electromagnetic clutch coil current conditioner , the air conditioning compressor is stopped, increasing the engine output power, increase the power of the car .