German ME Messsysteme sensors, ME Messsysteme models, ME Messsysteme prices

ME Messsysteme sensors precisely measure the actual displacement of the detected product by detecting the absolute position of a movable magnetic ring using internal non-contact measurement and control technology. The high precision and high reliability of these sensors have been widely applied in thousands of real-world cases. Since the movable magnetic ring used for position determination does not come into direct contact with the sensitive element, the sensors can be used in extremely harsh industrial environments and are not easily affected by oil stains, solutions, dust, or other contaminants. In addition, the sensors use high-tech materials and advanced electronic processing technology, allowing them to operate in high-temperature, high-pressure, and high-vibration environments. The sensor output signal is an absolute displacement value; even if power is interrupted and reconnected, data is not lost, and there is no need to re-zero. Because the sensitive element is non-contact, repeated detection causes no wear on the sensor, significantly improving detection reliability and service life.

ME Messsysteme sensor structure

It consists of two parts: the scale grating and the grating readhead. The figure on the right shows the structure of the linear encoder scale. The key part of the grating measuring device is the grating readhead, which consists of a light source, condensing lens, index grating, photoelectric elements, and adjustment mechanisms. There are many structural forms of grating readheads, classified according to their structural characteristics and application scenarios into direct-reception readheads (also known as silicon photovoltaic cell readheads, mirror-image readheads, beam-splitter readheads, and metal grating reflection readheads).

ME Messsysteme sensor principle

The essence of a grating displacement sensor is to perform measurement using the grating pitch as a standard ruler. High-resolution linear encoder scales are generally expensive and difficult to manufacture. To improve system resolution, Moiré fringes must be subdivided; grating scale sensor systems mostly use electronic subdivision methods. When two gratings overlap at a slight angle, Moiré fringes are generated in a direction roughly perpendicular to the grating lines. As the grating moves, the Moiré fringes move up and down accordingly. This converts the measurement of the grating pitch into the measurement of the number of Moiré fringes. Within one Moiré fringe width, placing 4 photoelectric devices at specific intervals enables electronic subdivision and direction discrimination. For example, for a grating scale with 50 line pairs/mm, the grating pitch is 0.02mm. With four-fold subdivision, counting pulses with a resolution of 5μm can be obtained, which achieves very high precision in general industrial measurement and control. Since displacement is a vector, both its magnitude and direction must be detected, requiring at least two photoelectric signals with different phases. To eliminate common-mode interference, DC components, and even harmonics, differential amplifiers composed of low-drift operational amplifiers are typically used. The 4 photoelectric signals obtained from 4 photosensitive devices are sent to the input terminals of 2 differential amplifiers. The two signals output from the differential amplifiers have a phase difference of π/2. To obtain direction discrimination and counting pulses, these two signals must be shaped, first into square waves with a duty cycle of 1:1. Then, by comparing the phases of the square waves, the movement direction of the grating scale can be determined. By counting the square wave pulses, the displacement and velocity of the grating scale can be obtained.

ME Messsysteme sensor usage precautions

When plugging and unplugging the connectors between the grating scale sensor and the digital display unit, ensure the power is turned off. Install protective covers whenever possible, and promptly clean chips and oil splashed onto the scale to strictly prevent any foreign matter from entering the grating scale sensor housing. Regularly check whether installation screws are loose. To extend the life of the dust-proof sealing strip, apply a thin, uniform layer of silicone oil to the strip, taking care not to splash it onto the glass grating etched surface. To ensure the reliability of the grating scale sensor, clean and wipe the grating scale surface and index grating surface at regular intervals with an ethanol mixture (50% each) to keep the glass grating scale surface clean. Grating scale sensors are strictly prohibited from being subjected to severe vibration or impact, as this may damage the grating scale; if the grating scale breaks, the sensor will fail. Do not disassemble the grating scale sensor yourself, and never arbitrarily change the relative spacing between the main grating and the secondary grating. Doing so may compromise the sensor's precision and cause relative friction between the main and secondary gratings, damaging the chrome layer and thus the grating lines, rendering the grating scale unusable. Take care to prevent oil and water contamination of the grating scale surface, as this can disrupt the distribution of grating lines and cause measurement errors. Grating scale sensors should avoid operating in environments with severe corrosive effects to prevent corrosion of the grating chrome layer and the grating scale surface, which would degrade the quality of the grating scale.

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