SU1244308A1 - System for shaping signals of deviation of tunnelling shied from design axis of tunnel at curving path portions - Google Patents

Description

The invention relates to the mining industry and can be used in the systems of automatic control of the tunnel shield on curved sections of the route.

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

FIG. 1 shows a block diagram of a system; in fig. 2 - the principle of operation of the system; in fig. 3 and 4 — an embodiment of the coordinate device; in fig. 5 - connection of elements OR.

The system contains a laser source 1 of the light of the beam 2 fixed on the lining 3 in the upper part of the tunnel covered. The four-coordinate photo sensor 4 is fixed on the coordinate device 5 in the upper part of the tunneling shield 6. The output of the four-coordinate photo sensor is connected to the input of the control command generation unit 7, the outputs of which are connected to the control inputs of the executive. of the leveling mechanism 8 of the position of the tunneling shield, which is a group of jacks pushing the tunneling shield. The system is equipped with a software information carrier in the form of a tape range finder 9 fixed next to the coordinate device 5. The free end of the tape of the range finder 9 is fixed at the suspension point of the laser source of the light beam. On the tape in the form of perforation, information is printed on the required sequence of pulses that must be sent to the drives of the coordinate device. The range finder 9 is structurally combined with the information reading unit 10. In the simplest case, there are eight tracks on the tape with information about the forward and reverse movement of four electro-. the motors of the drives 11 of the coordinate device 5. The information reading unit 10 contains eight (by the number of tracks) optocouplers and pulse shaping devices. The outputs of the rangefinder 9 are associated with the first inputs of the elements 12 OR.

The second inputs of the OR elements 12, which provide parallel control of the drives, are connected to the output of the compensation sensor 13

type The outputs of the elements 12 OR are connected with the inputs of the step-by-step stepper drives 1 of the coordinate device 5.

12443082

The photosensor 4, made in the form of a monoblock (see Figs. 3 and 4), is mounted on carriages with electric motors 11 placed on them with 5 help of hinges 14c brackets, providing its four-degree mobility. The carriages move along arcs 15 which are made coaxially with the cylindrical case of the tunneling shield O 6. The roll-type sensor 13 of the compensation type contains a sensor math element mounted on a movable carriage equipped with a compensating drive electric motor. 5, the sensor carriage 13 is located on

arc of the same curvature, - and drive ka-. rags of the same type used in the coordinate device.

Element 12 OR provides the passage of the control pulse either from the roll sensor 13 or from the reading unit of the rangefinder 9. Since the information on the input and output of the element 12 must contain information about it. 25 for the rotational control of an electric motor, then the principle implementation of this part of the circuit requires (FIG. 5) the use of eight OR elements, which are four groups of two elements. 30 At 3ITOM, each element of the NW passes the signal of the corresponding direction of rotation of one of the stepper motors: either from the rangefinder reading unit or from the 13-roll of the compensation type.

35

The system works as follows.

about 40

45

50

55

The laser source 1 of the light beam is installed at the calculated point of the tunnel. The end of the measuring tape of the range finder is fixed adjacent to the laser source 1 of the light beam. The four-coordinate photosensor 4 is set by the coordinate device 5 to a position in which it generates a deflection signal corresponding to the actual actual deviation of the tunneling shield 6 from the road. The deviation signal (linear displacement and angular deviation in the plan and profile) is used to form commands to control the mechanism for typing the tunnel shield, or is indicated on the driver's panel to decide the control panel position.

The system works as follows.

about

The laser source 1 of the light beam is installed at the calculated point of the tunnel. The end of the measuring tape of the range finder is fixed adjacent to the laser source 1 of the light beam. The four-coordinate photosensor 4 is set by the coordinate device 5 to a position in which it generates a deflection signal corresponding to the actual actual deviation of the tunneling shield 6 from the road. The deviation signal (linear displacement and angular deviation in the plan and profile) is used to form commands to control the mechanism for typing the tunnel shield, or is indicated on the driver's panel to decide the control panel position.

3 1244308 advancing. si

This 6 of the rangefinder 9 pulls out the measuring tape. The readout unit 10 on eight channels generates pulses that control the four-way electric motors of the coordinate device 5. The control is carried out in a unitary code, while maintaining the integrity of information with a complete power cut. .

The pulses supplied to the electric motors of the drives 11 provide, by means of kinematic links, which are carriages mounted on arcs 15 and brackets 14, a four-step movement of four-axis photosensor 4, whose position varies in function., And information applied in the unitary code on the tape rangefinder 9.

The change in the position of the photosensor 4 unambiguously corresponds to the required movement of the tunneling shield, which is ensured by the program of packing holes on the tape of the rangefinder 9.

08

In the presence of a roll, the sensor 13 of the roll generates control pulses, which are fed both to its own compensating drive and to the drives 11

Coordinator. In order to avoid overlapping of signals from the information reading unit 10 and the core sensor 13, the latter is connected to the OR elements only at the moment when the shield 6 is stopped.

The identity of the drives and arcs of 13 roll and coordinate 5 ensures that there is no error in measuring the deviations of the driving shield in the presence of th.

The movement of the four-photographic photosensor 4 by means of brackets and carriages is provided by electric motors 11. In this case

if all the motors of the electric motor of the drives 11 synchronously work, then the rotation of the four-coordinate photosensor 4 takes place relative to the axis of the tunneling shield, which is used for roll compensation.

just 2

eleven

Thebes. And the Editor I. Kishtulints

Compiled by I. Nazarkin

Tehred O. Sopko Proofreader L. Pat.

Order 3791/34

Circulation 470.

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Subscription

Claims (1)

(5'7) A SYSTEM FOR FORMING SIGNALS FOR DEPLOYING THE ROADBOARD FROM THE PROJECT TUNNEL AXIS ON THE CURVED LINE SUBJECTS, containing a reading unit with a programmable data carrier, a compensation type roll sensor and a coordinate device consisting of two coaxial with located on one carriage with a drive connected to a four-coordinate photosensor, optically connected to a laser light source fixed in the tunnel, the outputs of the four-coordinate photosensor connected to the input of the control command generation unit ', the outputs of which are connected to the control inputs of the actuator for aligning the position of the heading shield, characterized in that, in order to improve control accuracy, the device is equipped with eight OR elements, each arc of the coordinate device is equipped with one additional carriage with a drive moreover, the carriage drives are made in the form of stepper motors, each carriage is movably connected to the four-coordinate photosensor by means of two brackets with hinges, the programmable storage medium is made in the form of a tape range finder, on the tape of which information is contained in a unitary code, the outputs of the reading unit are connected to the first, inputs, elements OR, the outputs of which are connected respectively to the inputs of the carriage drives, and the outputs of the roll sensor are connected to the second inputs of elements OR.