SU101153A1 - Device for measuring terrain height - Google Patents

Description

There are known devices for measuring the height of a terrain, which contain a pilot mounted on a moving screen and are equipped to periodically fix the inclination angle of the latter with a contact device in the form of a globoidal drum rotating from the driving wheel, on the surface of which there is a contact ledge that closes the electrical day at the beginning of each turn and in contact with the protrusion contact at the end of the tandem.

The difference between an on-line device for measuring terrain heights is that, for the purpose of directly counting the elevations on the meter but the meter readings, the meter is driven in the form of an axis, rotated at speed, the normal speed of the crew, and a double electromagnetic clutch that is not switched by the contact device, that at the first closing of the electric value, it connects the counter with the axis and rotates its mechanism in one direction, and at the second closure - in the opposite direction, so that the mechanism of the counter at vorachivals for each revolution of the drum by an amount proportional nrevysheniyu.

The device should automatically automate leveling work.

FIG. 1 is a schematic representation of a device; in fig. 2 - practical design of the device; in fig. 3 is a schematic diagram of the device but is modified; in fig. 4 is an exemplary structural design of the instrumentalTBa.

On the surface of the drum 1 there is a contact bridge 2 (contact curve). When the drum rotates, the contact bridge 2 closes with the TOHKOii metal nolovochka 3, fastened at the end of the rod 4. Contact 3 with math deviation changes along the generator of the drum.

On the drum there is a contact 5 which is closed with a fixed contact 6 at a certain angle of rotation of the drum.

Contact vystun 2 (contact curve) is executed so that the ratio is satisfied

  K, sin ",

Where:

YI is the angle of novorot of the drum from the moment of contact closure of contact 5 with contact 6 to Za H: n; and contact contact 2 with contact of type 3;

Tz - the angle of rotation of the drum from MO-me i (that lock and j-coi of the protrusion 2 with contact 3 until the closure of contact 6 with contact 5;

l - angle of deviation; -./(i is the coefficient of hc.

Drum / gets porshnsnne from the wheel 7 crew.

When the drum drum is copied, the device sends signals to the relay 5, on 1 Ochayup1, its corresponding e; An anchor 11 and a degreasing coupling irit is turned to the VC; by a signal with a signal to an electromagnet and turned from an angle, the direction of the path that the equipment passes until it is pinned from the next contact device. This signal switches the electromagnet s using a relay.

As a result, the ryite muffler bark is opposed to the opposite electromagnet and will be rotated with it in the opposite direction and an angle proportional to the nutt, until the next signal appears, etc.

Since the duration of the signals is given by the contacting protrusion and the turn of the drum is selected proportional to the section of the path D 5, then for one revolution of the drum, the measles of the coupling rotates the magnitude, ravia / Ci {Si - 82 D sinci), where: Si The angle Sa is rotated - the section of the track, and the drum turns the angle; ..

Ki is the ratio of proporiopale.

The anchor of the coupling is attracted by the FIO sequence to one or another electromagnet, as a result of which it will turn out to be verified at an angle proportional to the magnitude of the transition and, thus, the counter 12 connected to the bark will take into account the magnitude of the wheel.

, Ssir, a.i f {, i {S, t

In the device according to the modification (Fig. 3), the determination of the excess is made by the measurement of the pulses.

The number of them} ls while this proiorzioialio D S sina. To ensure high accuracy of the circuit, it is necessary to measure sinaiolith with an accuracy of at least 0.001 radians, which is ensured by the development of a large number of pulses in the crew track.

So, for example, at the limiting profile angles of + 20 °, it is necessary to generate 300-400 impuls per 1 m path. Consequently, at a crew speed of 30 km / h, it is necessary to take into account the pulses that follow with a frequency of 2500 them / sec. Since the resolution of the electromagitic counters does not exceed 20-30 pulses / sec., The device uses an electronic triggers reducer consisting of 7-8 cells, allowing to divide the number of pulses posed at the input, 2 times, where - number of triggered cells.

The pulses and the input of the trigger gear 13 are supplied from the pulse generator 14, which produces pulses with a frequency proportional to the speed of the crew.

The control of pulses is produced by a relay 15, operating from signals from descriptors above the co-tact device.

On the section of the path D Si trigger device and the number of impuls is proportional to D S sina.

Excess A / g in the area iuti l S b} / det

/ g AS-,

where D is the proportionality coefficient. Excess I on the way S move n-crew:

TP:

I S A / g K S L ;.

Ooh

Thus, the magnitude of irevysheia is taken into account by the counter 12, connected with the electromagnetic mechanisms 16, working from the trigger gearbox / 5.

Subject invention

Claims (2)

1. A device for measuring the height of a terrain, containing a master suspended on a moving carriage, equipped to periodically fix the inclination of the latter by a contact device in the form of a globoidal drum rotating from the car wheel, on the surface of which there is a contact protrusion closing the electrical circuit at the beginning of each turn and in contact with the protrusion with the contact at the end of the tambourine, it is about the fact that, for the purpose of directly counting the elevations of the terrain, upon indication meter, the meter is driven in the form of an axis, bring: my view with a speed proportional to the speed of the crew and the double electromagnetic clutch, which is switched by the contact arrangement, so that at the first short circuit of the electrical circuit it connects the counter to the axis and rotates its mechanism into one side, and in the second circuit - in the opposite direction so that the counter mechanism reorders for each revolution of the drum by an amount proportional to the excess. 2. Modification of the device according to claim 1, characterized in that for activating the counter an electric pulse generator is used associated with the crew wheel and activated between the first and second short circuits of the auxiliary relay and the trigger switch by the counter.