SU723419A1 - Device for graduating sensor of pressure in a butt - Google Patents

Description

one

This invention relates to a measurement technique, namely, devices for measuring pressure at the junction of two rigid bodies.

A device for calibrating a pressure sensor at the junction of two rigid bodies is known in which the free end of the sensor is loaded with a known force and a calibration characteristic is obtained for you. calculating the pressure at the junction lj.

A disadvantage of this device is the large error in measuring the pressure at the junction, since the calibration does not take into account the properties of the contacting bodies.

A device for calibrating a pressure sensor is known which contains a rigid body with a sensor 2 mounted flush. The calibration is carried out by loading this body with a known force and measuring the deformation.

A disadvantage of this device is the large error in measuring the pressure at the junction, since the pressure value

The junction is calculated using experimental formulas.

The purpose of the invention is to reduce the error in measuring pressure at the junction by loading the sensor directly at the junction of two bodies.

To do this, in the proposed device for calibrating the pressure sensor in the joint, installed flush with the surface of one of the contacting bodies of the joint, containing a loading element of the sensor by a predetermined force, a calibration body is inserted between the two contacting bodies of the joint, that the contour of the contact surface of this heat is in the plane contact from the center of the sensor to a distance of at least three maximum linear dimensions of the contact surface of the sensor, and the calibration body is made of a material ide the actual material of the second interface body.

Claims (2)

The drawing shows a device for calibrating a pressure sensor in a clutch. The device contains a loading device 1, a compression dynamometer 2, a mandrel 3 for transferring an octal) contact part 4 with a sensor 5, a graduating body 6 and a massive base 7. The calibration is performed by a loading device 1 through a compression dynamometer 2 and 3 transmitting pressure on one from the contact parts 4. A calibration body 6 with a known contact area is placed between the parts to be contacted. When changing the known load related to the contact area of heat 6, the readings of the recording equipment connected to the sensor 5, i.e. The dependence of the indications of the equipment (for example, the pressure or deformation of the sensor 5 installed in the contacting body) and pressure (for example, in kg / s at the junction of the part 4 and the body 6) is obtained. Then the part 4 is mounted on the base 7j, the part 4 is loaded, in advance sensors 5 are loaded with loaded sensors. The readings of the recording equipment from the signals of sensors 5 when loading part 4 show the pattern of pressure distribution at the junction and the actual values of pressure in it. The use of the proposed device for calibrating the pressure sensor allows It is possible to directly obtain the values of pressure at one experiment, eliminate the need to determine and apply coefficients and indicators, and allow direct measurement to determine the actual pressure values and the nature of their distribution over the junction of the contacting phone. This will reduce the accuracy of measurements, reliability of the results and reduce the amount of work to determine specific pressure at the junction. Formula of the invention A device for calibration of a junction pressure sensor installed flush with the top of one of the contacting bodies of the junction, containing a loading element of the sensor with a predetermined force, characterized in that in order to reduce the error in measuring the pressure in the junction due to the loading of the sensor, directly in the junction, a calibration body is inserted between the junctional junction bodies of the junction that the contour of the contact surface of this body is removed in the plane of contact from the center of the sensor at a distance of at least three maximum linear dimensions of the contact surface of the sensor, and the calibration e body is made of a material identical to the material of the second joint body. Sources of information taken into account in the examination 1.Jenderedzh N. TS. Investigation and calculation of deformations and pressures in a flat joint, taking into account the rigidity of parts, dissertation, DK 2e, 2nd 4O-53. 2. Levina E. M., Reshetov D. M. Contact rigidity of machines. M., Mechanical Engineering, 1971. with. 28-43 (prototype) -i sh: