German wieland sensors wieland models wieland prices

wieland sensors are sensors that measure the operating speed of the measured object and convert it into an output signal. Speed measurement sensors include linear speed sensors and rotational speed sensors. With the development of technology, traditional measuring equipment can no longer meet current needs and is gradually being eliminated, while laser speed sensors have been widely used. They play an important role in the product production process. By connecting to a computer, they enable automated and intelligent measurement and control of the measured object. This is the product of the combination of modern measurement technology and computer technology.

wieland sensor introduction

Sensors used in robots to mimic tactile functions. Tactile sense is an important sensory function when humans come into direct contact with the external environment. Developing tactile sensors that meet requirements is one of the key technologies in robot development. With the development of microelectronics technology and the emergence of various organic materials, a variety of development plans for tactile sensors have been proposed, but most are currently in the laboratory stage, with few reaching commercialization. Tactile sensors can be roughly divided into contact sensors, force-torque sensors, pressure sensors, and slip sensors based on their functions.

wieland sensor classification

Slip sensors are used to determine and measure the slippage of objects when robots grasp or handle them. They are essentially displacement sensors. They can be divided into three categories based on whether they have sliding direction detection functionality: non-directional, single-directional, and omni-directional. 1) Non-directional sensors include probe-earphone types, which consist of sapphire probes, metal buffers, piezoelectric Rochelle salt crystals, and rubber buffers. Sliding causes the probe to vibrate, which is converted into corresponding electrical signals by the Rochelle salt. The buffer's role is to reduce noise. 2) Single-directional sensors include drum photoelectric types. The slippage of the grasped object causes the drum to rotate, leading to a photodiode receiving light signals transmitted through a code disk (mounted on the drum's circular surface). The object's slippage is measured via the drum's rotation angle signal. 3) Omni-directional sensors use metal balls whose surfaces are covered with insulating material and formed into conductive and non-conductive areas distributed in a latitude-longitude pattern. When the sensor contacts an object and slides, the ball rotates, causing the conductive and non-conductive areas on the ball's surface to alternately contact electrodes, thereby generating on/off signals. By counting and judging these on/off signals, the magnitude and direction of slippage can be measured. This type of sensor requires high manufacturing precision.

wieland sensor applications

Tactile sensors are used to determine whether a robot (mainly referring to limbs) is in contact with external objects or to measure the characteristics of the contacted objects. Types of tactile sensors include micro switches, conductive rubber, carbon-impregnated sponge, carbon fiber, and pneumatic reset devices. 1) Micro switch: Composed of a spring and contacts. When the contacts touch an external object, they move away from the base, causing the signal path to disconnect, thereby detecting contact with the external object. The advantage of this normally closed (always connected when not in contact) micro switch is its ease of use and simple structure; the disadvantages are susceptibility to mechanical oscillation and oxidation of the contacts. 2) Conductive rubber type: It uses conductive rubber as the sensitive element. When the contacts touch an external object and are compressed, the conductive rubber is pressed, changing its resistance and thus altering the current flowing through it. The disadvantage of this sensor is that due to variations in the material formulation of the conductive rubber, drift and hysteresis characteristics are inconsistent; the advantage is its flexibility. 3) Carbon-impregnated sponge type: It features an elastic body made of sponge mounted on a substrate, with carbon-impregnated sponge arranged in an array within the sponge. When the contacted object is compressed, the resistance of the carbon-impregnated sponge decreases. Measuring the magnitude of the current flowing through the carbon-impregnated sponge determines the degree of compression. This sensor can also be used as a pressure sensor. Advantages include simple structure, good elasticity, and ease of use. Disadvantages are that the uniformity of carbon distribution directly affects measurement results, and recovery capability after compression is poor. 4) Carbon fiber type: The upper layer is carbon fiber, the lower layer is the substrate, and urethane and metal electrodes are installed in between. When contacting an external object, the carbon fiber is compressed and makes contact with the electrodes to conduct electricity. The advantage is good flexibility, allowing installation on curved surfaces of robotic arms, but hysteresis is significant. 5) Pneumatic reset type: It has a flexible insulating surface that deforms under pressure, and uses compressed air as the resetting force when contact is released. When in contact with an external object, the internal elastic dome (beryllium copper foil) contacts the lower contacts to conduct electricity. Advantages are good flexibility and high reliability, but a compressed air source is required.

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