German Fritz Kuebler sensors, Fritz Kuebler models, Fritz Kuebler prices

Fritz Kuebler sensors are devices that convert optical signals into electrical signals. Their operating principle is based on the photoelectric effect. The photoelectric effect refers to the phenomenon where electrons in a material absorb photon energy upon illumination, resulting in corresponding electrical effects. Based on the different manifestations of the photoelectric effect, it is categorized into three types: external photoelectric effect, internal photoelectric effect, and photovoltaic effect. Photoelectric devices include phototubes, photomultiplier tubes, photoresistors, photodiodes, phototransistors, and solar cells. The performance and characteristic curves of these photoelectric devices are analyzed.

Fritz Kuebler sensor classification

1) Contact sensors: The contacts of contact sensors actuate when two objects come into contact and press against each other. Common examples include limit switches and two-dimensional matrix position sensors. Limit switches feature simple structure, reliable operation, and low cost. When a moving object encounters a limit switch, its internal contacts actuate to complete control functions. For instance, if limit switches are installed at both ends of the X, Y, and Z axes of a machining center, the travel range can be controlled. Two-dimensional matrix position sensors are installed on the inner side of mechanical grippers to detect the contact position relative to an object. 2) Proximity sensors: A proximity switch is a switch that emits an "actuation" signal when an object approaches within a set distance, without requiring direct physical contact. There are many types of proximity switches, mainly including electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, and Hall effect types. The main applications of proximity switches on CNC machine tools include tool selection control for tool turrets, worktable travel control, and stroke control for hydraulic and pneumatic cylinder pistons.

Fritz Kuebler sensor operating principle

The crankshaft position sensor is typically installed at the front end of the crankshaft (at the pulley), at the rear end near the large flywheel, or in the middle of the crankshaft. In earlier vehicle models, it was also installed inside the distributor. It is one of the most important sensors in the control system. Its functions include: detecting engine speed, hence it is also called a speed sensor; detecting the top dead center position of the piston, thus it is also referred to as a top dead center sensor, including signals for detecting the top dead center of each cylinder used for ignition control and the top dead center signal of the first cylinder used for sequential fuel injection control.

Fritz Kuebler sensor industry applications

1) Brushless DC motors: Position sensors are one of the three main components of a brushless DC motor system and are the primary feature distinguishing them from brushed DC motors. Their function is to detect the position of the main rotor during motion, converting the position signal of the rotor magnet poles into electrical signals. This provides correct commutation information to the logic switching circuit to control their conduction and cutoff, causing the current in the motor armature windings to commutate sequentially according to changes in rotor position. This forms a stepwise rotating magnetic field in the air gap, driving the permanent magnet rotor to rotate continuously. Brushless DC motors require position sensors to measure rotor position; the motor controller uses the position sensor signals to synchronize inverter commutation with the rotor, driving continuous motor operation. Although brushless DC motors can detect rotor position via back electromotive force (back-EMF) generated in the stator windings, thereby eliminating the need for position sensors, the rotational speed is too low at startup, resulting in back-EMF signals that are too weak to detect. Hall effect sensor chips used as position sensors for brushless DC motors are classified into switching and latching types. For electric bicycle motors, both types of Hall sensor chips can be used to accurately measure the position of the rotor magnets. The performance of brushless DC motors made with these two types of Hall sensor chips, including output power, efficiency, and torque, shows no difference, and they are compatible with the same motor controllers. The application of position sensors reduces motor operating noise, improves motor life and performance, and achieves energy savings. The application of position sensors undoubtedly provides strong impetus to the development of the motor market. 2) Crankshaft and camshaft: The function of the position sensor is to collect crankshaft rotation angle and engine speed signals and input them to the electronic control unit (ECu) to determine ignition timing and fuel injection timing. To distinguish it from the crankshaft position sensor (CPS), the camshaft position sensor is generally denoted by CIS. The function of the camshaft position sensor is to collect the position signal of the camshaft controlling valve timing and input it to ECU, allowing ECU to identify the compression TDC of cylinder 1, thereby enabling sequential fuel injection control, ignition timing control, and knock control. Additionally, the camshaft position signal is used to identify the first ignition timing during engine start-up. Because the camshaft position sensor can identify which cylinder's piston is approaching TDC, it is also called a cylinder identification sensor.

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