German SBP tools sensors, SBP tools models, SBP tools prices

SBP tools sensors are sensors used to measure the robot's own position. Position sensors can be divided into two types: contact sensors and proximity sensors. They are sensors that can sense the position of the measured object and convert it into a usable output signal. It is a sensor that can sense the position of the measured object and convert it into a usable output signal. Position sensors can be used to detect position and reflect switches in certain states. Unlike displacement sensors, position sensors come in two types: contact and proximity.

SBP tools sensor detection principle

It detects magnetic losses caused by eddy currents generated on the surface of the conductor through the influence of an external magnetic field. This detection method involves generating an alternating magnetic field within the detection coil and detecting impedance changes caused by eddy currents produced in the metal body of the detected object. In addition, another method includes aluminum detection sensors that detect frequency phase components, and all-metal sensors that detect only impedance change components through the working coil. A transformer state occurs on the surfaces of both the detected object side and the sensor side.

SBP tools sensor classification

1) Capacitive proximity sensor: This is a capacitive proximity switch with an electrode as the detection terminal. It consists of a high-frequency oscillation circuit, a detection circuit, an amplification circuit, a shaping circuit, and an output circuit. Normally, there is a certain capacitance between the detection electrode and the ground, which becomes part of the oscillation circuit. When the detected object approaches the detection electrode, the detection electrode is subjected to electrostatic induction and produces polarization because voltage is applied to it. The closer the measured object is to the detection electrode, the more induced charge accumulates on the detection electrode. Since the electrostatic capacitance of the detection electrode is C, the capacitance C of the detection electrode increases as the charge increases. Since the oscillation frequency of the oscillation circuit is inversely proportional to the capacitance, when the capacitance C increases, the oscillation of the oscillation circuit weakens or even stops. These two states, oscillation and stoppage, are converted by the detection circuit into switch signals for external output. 2) Inductive proximity sensor: Consists of a high-frequency oscillation circuit, a detection circuit, an amplification circuit, a shaping circuit, and an output circuit. The sensitive element for detection is the detection coil, which is part of the oscillation circuit. The oscillation frequency of the oscillation circuit is L. When alternating current passes through the detection coil, an alternating magnetic field is generated around it. When a metal object approaches the detection coil, eddy currents are generated in the metal object, absorbing magnetic field energy. This causes the inductance L of the detection coil to change, thereby reducing the oscillation frequency of the oscillation circuit until it stops oscillating. These two states, oscillation and stoppage, are converted by the monitoring circuit into switch signal outputs. Note: Similar to capacitive proximity sensors, the objects detected by inductive proximity sensors are also metal conductors; non-metallic conductors cannot be measured using this method. Amplitude changes vary with the type of metal in the target object, so the detection distance also varies with the type of metal in the target object. 3) Photoelectric proximity sensor: The beam axis of the light-emitting diode (or semiconductor laser tube) and the axis of the phototransistor lie in the same plane and form a certain angle. The two axes intersect at a point in front of the sensor. When the surface of the detected object approaches the intersection point, the reflected light from the light-emitting diode is received by the phototransistor, generating an electrical signal. When the object moves away from the intersection point, the reflection area is no longer within the viewing angle of the phototransistor, and the detection circuit has no output. Generally, the drive current supplied to the light-emitting diode is not direct current but alternating current of a certain frequency. Thus, the receiving circuit also receives an alternating signal of the same frequency. If the received signal is filtered to allow only signals of the same frequency to pass, interference from other stray light can be effectively prevented, and the luminous intensity of the light-emitting diode can be improved.

SBP tools sensor applications

Proximity sensors are mainly used to detect object displacement and are widely applied in aviation, aerospace technology, and industrial production. They are also used in daily life, such as in automatic doors and automatic heaters in hotels, restaurants, and garages. For security and anti-theft purposes, important locations such as archives, accounting departments, financial institutions, museums, and vaults are typically equipped with anti-theft devices composed of various proximity switches. In measurement technology, they are used for measuring length and position; in control technology, they are extensively used for measuring and controlling displacement, speed, and acceleration.

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