SU949385A1 - Device for measuring ground reaction to track laying machine movement - Google Patents

Description

(54) DEVICE FOR MEASURING GROUND REACTIONS DURING TRAINING MACHINE TRAFFIC

one

This invention relates to vehicle testing.

A device for measuring soil reactions is known, in which a strain gauge track chain circuit is connected to adjacent tracks by using strain gauge palanas consisting of two parts l.

However, such a device does not provide accurate measurements of ground reactions, since its design does not correspond to a real track in which the finger is a single whole.

It is also known a device for measuring soil reactions during the motion of a tracked vehicle, containing a strain gauge truck and working tracks located on either side of it, strain gauge fingers with strain gauges installed in track eyes, interlocking earrings connecting articulated tracks 2.

A disadvantage of this device is that the installation of strain gauges

fingers in only one track reduces the accuracy of measurements, since in real conditions of movement in the load on the track, the load on the adjacent tracks also influences.

The purpose of the invention is to improve the measurement accuracy.

The goal is achieved by the fact that the device is equipped with additional strain gauge tracks installed between the strain gauge track and} workbench tracks, locking earrings are made at one end with heads having openings, and the second end is connected hingedly to the strain gauge fingers, which are mounted with a gap in all lugs of strain gauge tracks and fixed rigidly in the lugs of working tracks and in the holes of the heads.

The drawing schematically shows the proposed device, a General view.

Claims (2)

Strain gauge pins 5 to 8 with strain gages mounted on them are inserted into the lugs of strain gages 1–3 and working tracks 4. The design of the fingers is such that the ends of them are rigidly fixed in the lugs of the locking earrings 9-11 and working tracks 4 and the stopper is twisted by turning them with pins 12. In the eyes of strain gauge tracks, the fingers have thickenings, the diameter of which is less than the diameter of the holes in the lugs by the value of the definitely selected gap. The locking earrings are connected to each other and with the working tracks hingedly and equipped with washers 13 and CTonoj screws 14. On the necks of the strain girdles in places of greatest deformation, short base load cells 1 are glued, which measure the normal response of the soil. Similarly, strain gauges 16 are glued in a mutually perpendicular plane, which measures the longitudinal response of the soil. The sensors are connected by summation of the Toshi scheme. Sealing bars 17 are installed between the eyes of the tracks to reduce the ingress of abrasive. The locking earrings are made with heads 18 that have holes 19 in which tensile pins are attached. When the tracked vehicle is moving, the tensile forces acting in the tracked contour are perceived by the locking stubs 9-11, on which the load cells are glued, and recorded by means of measuring equipment. At the same time, the strain gauge earrings block tracks 1 - 3, and due to the presence of a gap between the eyes of the said tracks and the stepped sections of the strain gages 5-7, the strain glands turn out to be unloaded from the tensile forces in the crawler bypass. Under the action of a horizontal soil reaction, the gap is selected and the strain of the ten-finger fingers begins 5-7. Since the tensopalcans are connected to the locking tongues 9-11 and the working tracks 4, between their eyes, either a double-support or multi-support bending beam is formed. In the places of the greatest deformations, i.e., at the base of the supports, strain gauges 16 are glued. In the same way, the normal soil response is measured using strain gauges 15 installed in a mutually perpendicular plane. To measure the lateral reactions of the soil, strain gauges of locking earrings are used. The connection of the sensors is compensatory, i.e., when loading in one plane, one arm of the measuring bridge is working, and the other is compensatory, and when unloading in the other plane, vice versa. The proposed device allows to increase the measurement accuracy, especially at high speeds of movement. The invention The device for measuring soil reactions during the motion of a tracked vehicle, containing a strain gauge truck and working tracks located on either side of it, strain gauge fingers with strain gauges installed in track eyes and locking earrings connecting articulated working tracks that differ that, in order to improve the measurement accuracy of the device, it is equipped with additional strain gauge tracks and working tracks, the locking sesg are filled with one end with heads having These, and the other end, are connected pivotally to strain gauge fingers, which are installed with a gap in all eyes of strain gauge tracks and are rigidly fixed in the eyes of working tracks and in the holes of the heads. Sources of information taken into account in the examination 1. Authors svdedelstvo CX; CP No. 783107, cl. B 62 B 55/18, 30.11.80. 2. USSR author's certificate number 661287, cl. GO1 M 17 / OO, O5.O5.79 (prototype). fS / 7 rr