SU1747959A1 - Force sensor - Google Patents

Abstract

The invention relates to load measuring technology and is intended to determine mechanical forces. 8, a force-transmitting element 7 is introduced to increase the accuracy of the force sensor, the electrodes are made in the form of two systems of elements periodically alternating in cross section and fixed rigidly on the substrate, the resistive element can also be made in cross section and provided with a separate conductive layer 5, which allows It is possible to obtain a sensor characteristic in a wide measuring range. 4 hp f-ly, 2 silt i with

Description

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The invention relates to a force measuring technique and is intended to measure the magnitude of a force applied to a sensor surface.

The purpose of the invention is to improve the measurement accuracy by improving the metrological characteristics of the sensor.

Figure 1 shows the sensor, a cross-section; Figure 2 is the same exemplary embodiment.

The force sensor contains sheath 1, electrodes 2 and 3, consisting of systems of intermittently alternating elements, specially shaped in cross section, fixed on dielectric substrate 4. resilient element 5, shaped in accordance with the shape of electrodes, electrically conducting b, block transfer element 7 in the form of a rigid plate and terminals 8 of the electrodes.

The sensor works as follows.

The measured force through the shell 1 and the power-transmitting element 7 acts on the resistive element 5. Due to the presence of the element 7, the resilient element 5 is deformed uniformly across the entire surface of the sensor. This leads to a change in its electrical resistance. Since the elements of which electrodes 2 and 3 are made are specially shaped in height, the contact area of the electrically driven layer b or the resistive element 5 with electrodes 2 and 3 changes, and the electrical resistance in the contact zone from the compressive effort The combination of these three factors provides a linear characteristic of the sensor over the entire range of measured forces. The magnitude of the change in resistance between the electrodes determines the value of the force using a calibration characteristic.

Claims (5)

1. A force sensor containing a shell inside which an insulating substrate with electrodes arranged in the form of alternating conductors of different polarity are arranged on its surface, and an elastic-resistive element that is placed between the shell and electrodes, characterized in that increasing the accuracy of measurement and improving the linearity of the output characteristic; a force-transmitting element is introduced into it; arranged periodically between themselves and fixedly mounted on the substrate. 2. Sensor no n 1, characterized in that, in order to improve measurement accuracy, the shaped elements of the electrodes are made in the form of concentric rings. 3. Pop-1 sensor, characterized in that, in order to improve the measurement accuracy and reduce the size, one electrode is made in the form of a central protrusion, and the other in the form of a ring. 4. The sensor according to claim 1, characterized in that, with a whole improvement in the linearity of the output characteristic, the elastic-resistive the element is made profiled in accordance with the shape and profile of the electrodes. 5. The sensor according to claim 1, characterized in that the resilient element of an electrically conductive elastic material or from a layer of an elastic material and a layer of electrically conductive material attached thereto. 7 e S3 2 Fig