German PAVONE sensors PAVONE models PAVONE prices

PAVONE sensors are sensors that use laser technology for measurement. They consist of a laser emitter, a laser detector, and a measurement circuit. Laser sensors are a new type of measuring instrument; their advantages include the ability to perform non-contact long-distance measurement, high speed, high precision, large measuring range, and strong resistance to optical and electrical interference.

PAVONE sensor detection principle

Detection is performed by monitoring magnetic losses caused by eddy currents generated on the surface of a conductor under the influence of an external magnetic field. An AC magnetic field is generated within the detection coil, and detection is achieved by monitoring the impedance changes caused by eddy currents in the metallic object being detected. Additionally, other methods include aluminum detection sensors that detect frequency phase components, and all-metal sensors that detect only impedance change components through the operating coil. A transformer state occurs between the surface of the object being detected and the surface of the sensor.

PAVONE sensor classification

1) Capacitive proximity sensors: These are capacitive proximity switches with electrodes as the detection terminal. They consist 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 ground, which becomes part of the oscillation circuit. When the object being detected approaches the detection electrode, the voltage applied to the electrode causes electrostatic induction and polarization. The closer the object is to the detection electrode, the more induced charge accumulates on the electrode. Since the electrostatic capacitance of the detection electrode is C, the capacitance C increases as the charge increases. Since the oscillation frequency of the oscillation circuit is inversely proportional to the capacitance, the oscillation weakens or even stops when the capacitance C increases. The two states of oscillation and non-oscillation are converted into switch signals by the detection circuit and output externally. 2) Inductive proximity sensors: These consist 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 circuit is L. When AC current flows 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 energy and causing changes in the inductance L of the detection coil. This reduces the oscillation frequency of the circuit, potentially stopping oscillation. The two states of oscillation and non-oscillation are converted into switch signals by the monitoring circuit and output. Note: Similar to capacitive proximity sensors, inductive proximity sensors detect metallic 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. 3) Photoelectric proximity sensors: 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 specific angle, intersecting at a point in front of the sensor. When the surface of the object being detected approaches the intersection point, the reflected light from the LED 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 phototransistor's field of view, and the detection circuit produces no output. Generally, the drive current supplied to the LED is not DC but an AC current of a specific frequency. Thus, the receiving circuit also receives an AC signal of the same frequency. Filtering the received signal to allow only signals of the same frequency to pass effectively prevents interference from other ambient light and can increase the luminous intensity of the LED.

PAVONE sensor applications

Proximity sensors are primarily used to detect object displacement and are widely applied in aviation, aerospace technology, and industrial production. In daily life, they are used in automatic doors and automatic hot air blowers 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 length and position measurement; in control technology, they are extensively used for the measurement and control of displacement, speed, and acceleration.

Weidou Intelligent Technology specializes in selling German PAVONE sensors, PAVONE proximity sensors, PAVONE distance sensors, PAVONE vision sensors, PAVONE displacement sensors, PAVONE load cells, PAVONE speed sensors, PAVONE photoelectric sensors, PAVONE position sensors, PAVONE angle sensors, PAVONE tactile sensors, PAVONE temperature sensors, PAVONE pressure sensors, PAVONE flow sensors, PAVONE level sensors, PAVONE motion sensors, and PAVONE process sensors. All products are original imports from Germany. Customers are welcome to inquire and place orders.