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BOMO sensors, also known as torque sensors, torsion sensors, torque transducers, and torque meters, are divided into two main categories: dynamic and static. Dynamic torque sensors are also referred to as torque sensors, torque-speed sensors, non-contact torque sensors, and rotary torque sensors. Torque sensors detect the twisting moment on various rotating or non-rotating mechanical components. They convert the physical changes in torque into precise electrical signals. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches. They offer advantages such as high precision, fast frequency response, good reliability, and long service life.

BOMO sensor classification

1) Contact sensors: The contacts of contact sensors are activated by the contact and compression of two objects. Common types include limit switches and two-dimensional matrix position sensors. Limit switches have a simple structure, reliable operation, and low cost. When an object moves and hits a limit switch, its internal contacts activate to complete control. For example, 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 inside mechanical grippers to detect the contact position with an object. 2) Proximity sensors: A proximity switch is a switch that emits an "action" signal when an object approaches within a set distance, without requiring direct contact. There are many types of proximity switches, mainly including electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, and Hall effect types. The application of proximity switches on CNC machine tools mainly includes tool selection control for the tool turret, worktable travel control, and piston stroke control for oil and air cylinders.

BOMO sensor working principle

Crankshaft position sensors are 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 early vehicle models, they were also installed inside the distributor. They are one of the most important sensors in the control system. Their functions include detecting engine speed, hence they are also called speed sensors; and detecting the top dead center (TDC) position of the piston, hence they are also called TDC sensors. This includes detecting the TDC signal for each cylinder used to control ignition, and the TDC signal for the first cylinder used to control sequential fuel injection.

BOMO 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 main feature distinguishing them from brushed DC motors. Their function is to detect the position of the main rotor during motion, convert the position signal of the rotor magnet poles into electrical signals, and provide correct commutation information to the logic switching circuit. This controls their conduction and cutoff, causing the current in the motor armature windings to commutate sequentially according to the rotor position, forming a stepwise rotating magnetic field in the air gap that drives the permanent magnet rotor to rotate continuously. Brushless DC motors require position sensors to measure the rotor position. The motor controller uses the position sensor signals to synchronize inverter commutation with the rotor, driving the motor for continuous operation. Although brushless DC motors can also detect rotor position via the back electromotive force (back EMF) generated by the stator windings, thereby eliminating the need for position sensors, the rotational speed is too low during motor startup, resulting in a back EMF signal that is too weak to be detected. Hall effect sensor chips used as position sensors for brushless DC motors are divided into switching and latching types. For electric bicycle motors, both types of Hall effect 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 effect 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 valve train camshaft and input it to the ECU, so that the ECU can identify the compression TDC of cylinder 1, thereby enabling sequential fuel injection control, ignition timing control, and knock control. In addition, 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 about to reach top dead center, it is also called a cylinder identification sensor.

Weidou Intelligent Technology specializes in selling German BOMO sensors, BOMO proximity sensors, BOMO distance sensors, BOMO vision sensors, BOMO displacement sensors, BOMO torque sensors, BOMO speed sensors, BOMO photoelectric sensors, BOMO position sensors, BOMO angle sensors, BOMO tactile sensors, BOMO temperature sensors, BOMO pressure sensors, BOMO flow sensors, BOMO level sensors, BOMO motion sensors, and BOMO process sensors. Original imports from Germany. Welcome inquiries and orders from users.