RU2249689C2 - Automated device for calibrating inclinometers (variants) - Google Patents

Abstract

FIELD: inclinometers.

SUBSTANCE: device has substrate with adjusting screws, rotating table with inclinometer holding assembly, drive for rotation and holding of table, detectors of zenith and azimuth angles, azimuth zero detector, zenith zero detector, laser detector of vertical axis, channel for communication with inclinometer, drive control block, block for indication and connection of the latter to a PC. Drive is provided with electric engines, connected to rotary supports of table. Substrate is made in form of collapsible vertical support truss with rigid base. Table is made in form of system of two frames, greater than inclinometer dimensions, and inclinometer holding assembly. First frame is mounted on rotary supports between base and top of support truss. Second frame is mounted on rotary supports inside first frame with possible rotation in plane, passing through rotation axis of first frame. Assembly for holding inclinometer is mounted inside second frame in such a way, that intersection point of frames rotation axes matches gravity center of frames, gravity center of inclinometer holding assembly and gravity center of inclinometer itself. In other variant of automated device table is made in form of system of three frame. Third frame is mounted on rotary supports inside second frame with possible rotation around its longitudinal axis, matching longitudinal axis of inclinometer.

EFFECT: higher precision and simplified operation process.

2 cl, 2 dwg

Description

The device relates to the field of research and bench testing of inclinometers, in particular for adjusting and calibrating their sensitive elements.

A known installation for tuning and experimental studies of the inclinometer (patent of Russian Federation No. 02178522, E 21 B 47/02, 01/20/2002), containing a U-shaped stand in the form of a plate and two vertical racks mounted on a tripod, a rotary table in the form of three platforms , the mounting unit of the inclinometer case in the form of two steering wheels, a cylinder and a replaceable collet, a drive for turning and fixing the turntable in the form of worm gear disks.

The design of the rotary table of this installation can provide the specified accuracy of calibration of the sensitive element of the inclinometer only within certain limits of zenith angles, since the platforms of the rotary table limit the passage length of the inclinometer body. This design requires considerable time and labor for calibrating one inclinometer also due to manual operations of reproducing given angles, which limits the functionality of the calibration installation as a whole.

To exclude the influence of magnetic inhomogeneity of the surrounding space in the room of the inclinometer calibration section, the latter is fixed in the unit cantilever with the condition that the sensitive element of the azimuthal angle is located in the center of rotation of the turntable. Due to the fact that the inclinometer is not fixed at the center of gravity, additional counterweights are required to balance it, which increases the load on the nodes of the installation turntable.

In addition, in this installation, the possibilities are limited to increase the distance between the supports of the vertical axis, which increases the lateral loads on them, as a result of which considerable efforts are required to set the azimuthal angles, therefore, to automate the process of turning the inclinometer in space, considerable drive power is required. If you use electric motors to automate the operation of the installation and place them directly on the installation, they will introduce errors when calibrating the inclinometer at azimuthal angles, and automation of the operation of this installation by other types of drives is difficult.

The attachment unit of the inclinometer housing using a collet clamp requires a set of interchangeable collets for inclinometers with different body diameters, which does not ensure the alignment of the inclinometer relative to the clamp axis and leads to additional material and time costs for re-debugging the unit before calibrating each subsequent device.

A well-known test inclinometer UPI-1 (Product catalog of OAO NPF Geofizika, Ufa, 2001), containing a stand in the form of a tripod, a rotary table with an inclinometer fixation unit, a drive for turning and fixing the rotary table, balancing balances, graduated limbs and microscrews rough and accurate installation of given angles.

This installation was performed at a higher technical level compared to the previous one, but does not fundamentally differ in kinematics from it and, accordingly, has all the drawbacks of the previous analogue, namely, it does not automate the playback of given angles during the calibration of inclinometers.

The objective of the present invention is to expand the operational capabilities of the calibration installation by automating the calibration process, improving the accuracy of calibration and ease of use.

The problem is solved as follows.

An automated installation for calibrating inclinometers, comprising a stand with adjusting screws, a rotary table with an inclinometer fixing unit, a rotary table and a rotary table fixing drive, is additionally equipped with anti-aircraft and azimuth angle sensors, an azimuth zero sensor, a zenith zero sensor, a vertical axis laser sensor, and a communication channel with an inclinometer, a drive control unit and a display and pairing unit for the latter with a personal computer, and the rotation and fixation drive of the turntable is equipped with motors, and related supports the rotation of the turntable. In this case, the stand is made in the form of a prefabricated vertical support truss with a rigid base, the rotary table is made in the form of a system of two frames exceeding the dimensions of the inclinometer, and an inclinometer fixation unit, the first frame mounted on rotation supports between the base and the top of the support truss, and the second frame - on the rotation supports inside the first frame with the possibility of rotation in a plane passing through the axis of rotation of the first frame, and the inclinometer fixation unit is installed inside the second frame so that the intersection point of the axes is rotational The frame coincides with the center of gravity of these frames, the center of gravity of the inclinometer fixation unit and the center of gravity of the inclinometer itself.

The turntable can also be equipped with a third frame mounted on rotation supports inside the second frame with the possibility of rotation around its longitudinal axis, which coincides with the longitudinal axis of the inclinometer. In this case, the inclinometer fixation unit is installed inside the third frame.

The proposed design of an automated installation for calibrating inclinometers has the following advantages compared to the prototype:

- the presence in the installation of a system of azimuth and zenith angle sensors, an azimuth zero sensor, a zenith zero sensor and a vertical axis laser sensor provides the ability to accurately set the set parameters when calibrating the inclinometer;

- the implementation of the stand in the form of a prefabricated vertical support truss with a massive base of large size provides a reliable horizontal base of the installation and the rigidity of its top in space, and the single-support type of construction of the stand provides calibration of the kinometer on the azimuthal angle within 340 ° with a rotation angle within 360 °;

- fastening the rotary table in the rotation supports between the base and the top of the farmer support allows to spread the rotation supports of the first frame of the rotary table relative to each other by a distance sufficient to install electric motors that automatically rotate the rotary table and / or its elements during the calibration of the inclinometer. In addition, the proposed design allows the use of long electric drive shafts to carry electric motors from gearboxes to a distance at which the influence of the magnetic masses of electric motors on the sensitivity of the inclinometer can be neglected;

- the design of the rotary table, ensuring the intersection of the axes of rotation of the frames at a point in space that coincides with the center of gravity of all frames, with the center of gravity of the fixation unit of the inclinometer and the center of gravity of the inclinometer itself, significantly reduces the load on the supports of rotation, reduces the required power level of the electric drive of the rotary frames and allows refuse to use adjustable counterweights as in known devices;

- the symmetry of the design of the rotary table and the balance of the load moments on the nodes of rotation ensures the stability of the metrological characteristics of the calibration installation;

- the presence of an electric rotary table, azimuth and zenith angle sensors, as well as an interface unit for these sensors and an inclinometer with an external computer provides an automatic mode of operation of the calibration unit;

- the presence of a third frame in the design of the rotary table expands the functionality of the proposed automated installation for calibrating inclinometers, since it provides simultaneous registration of the orientation of the inclinometer in space and around its own axis;

- the design of the drive for turning and fixing the rotary table in the form of a combination of electric motors for rotating frames and gearboxes with a worm gear for each frame provides the possibility of calibrating inclinometers in both automatic and semi-automatic modes with manual control of the electric drive depending on the operating conditions of this calibration unit;

- automation of the calibration process of inclinometers can improve the quality of calibration, reduce the time spent on calibration, ensure the use of calibration data in a network communication system of logging stations and the interpretation service of the enterprise.

The proposed technical solution does not require for the practical implementation of special materials and equipment, just in practical implementation. The design uses industrially produced components.

The applicant is not aware of technical solutions containing similar features that distinguish the claimed technical solution from the prototype.

Figure 1 presents a variant of an automated installation for calibrating inclinometers with a rotary table consisting of two frames.

Figure 2 schematically shows the location of the rotary table in the supporting truss (option of three frames).

The automated installation for calibrating inclinometers (hereinafter referred to as the calibration installation) contains a stand in the form of a combined (two-part) support truss 1 of non-magnetic material with a rigid base 2 in the form of a support frame with attachment points to the floor, a rotary table consisting of frames 3 and 4, a drive for turning and fixing the rotary table in the form of a stepper motor of zenith angles 5 and a stepper motor of azimuthal angles 6, a fixing unit 7 of the inclinometer 8, azimuth and zenith angle sensors 9 and 10, respectively, an azimuth sensor Uta 11, zenith zero sensor 12, a vertical axis laser sensor 13, a communication channel 14 with an inclinometer 8, a drive control unit 15, an indication and interface unit 16 of the control unit 15 with a personal computer 17.

Work on the proposed calibration installation is as follows.

The stand is pre-mounted in the space provided for installation. Since the supporting farm 1 is prefabricated, it is assembled and the base 2 is fixed to the floor with anchor bolts. Then, the rotary table is installed in the appropriate support of rotation between the base and the top of the support truss 1. Using the optical protractor-quadrant on the sensor 13, the vertical axis of the installation is adjusted. Before the calibration process, a mark is applied to the body of the calibrated inclinometer 8, which determines the center of gravity of the device - that is, the seat of the device in the rotary table of the installation. In accordance with this label, the calibrated inclinometer 8 is mounted in the fixing unit 7 in a horizontal position. The calibration process starts. The calibration process can be carried out both in automatic and in semi-automatic mode with manual control of the drive, depending on the operating conditions of this calibration installation. The calibration mode is set by the control unit 15. In automatic mode, the manual mode is disabled, and the automatic process is turned on by default. Through the display and pairing unit 16, the power supply of the sensors 9-12 is turned on, the readings of which are displayed on the indicators of the block 16 and are sent to the computer 17. According to the corresponding program, the stepper motors 5 and 6 are turned on by the computer 17. In this case, the fixing unit 7 with the inclinometer 8 is set to zero in azimuth and zenith angles. Then, according to the corresponding program, the computer 17 sets sequentially set positions of the calibrated inclinometer 8 in space with stops at the reference points or in a continuous rotation mode, depending on the task. The data obtained from sensors 9-12 are read and displayed by the interface and indication unit 16, and are sent to computer 17. Computer 17 processes data at the orientation angles of the calibrated inclinometer 8 and generates a protocol and calibration certificate. At the end of the calibration process, the inclinometer 8 automatically returns to its original horizontal position and is removed from the fixing unit 7.

If necessary (at the request of the customer), the rotary table of this calibration unit can be assembled from three frames - 3, 4 and 18. Frame 18 is equipped with turning units and devices for measuring rotation angles similar to other frames. The location of the frames 3, 4 and 18 relative to each other is shown in Fig.2. The calibration process of the inclinometer 8 in this case is carried out in the sequence described above.

When using this calibration unit in stand-alone conditions, it is possible to calibrate the inclinometer in a semi-automatic mode with manual control of the spatial angles. The speed of inclinometer in space in automatic mode is 1 rpm in the azimuthal plane.

Thus, the proposed technical solution, namely

- an automated installation for calibrating inclinometers provides calibration of the inclinometer by azimuth angle within 340 ° with a rotation angle within 360 °;

- provides, regardless of the dimensions of the calibrated inclinometer, the damper placement of the latter in the seat of the installation fixing unit, which allows you to save the certification characteristics of the calibration installation itself.

The design of the turntable provides the use of low-power small-sized electric motors that do not distort the magnetic field of the surrounding space within the sensitivity of the calibrated inclinometer.

The design of the drive for turning and fixing the rotary table in the form of a combination of stepper motors and gearboxes with worm gears allows the calibration of inclinometers in automatic or semi-automatic modes with manual control of the electric drive depending on the operating conditions of this calibration unit.

Claims (2)

1. An automated installation for calibrating inclinometers, comprising a stand with adjusting screws, a rotary table with an inclinometer fixing unit, a rotary table and a rotary table fixing drive, characterized in that it is additionally equipped with zenith and azimuth angle sensors, an azimuth zero sensor, a zenith zero sensor, a laser a vertical axis sensor, a communication channel with an inclinometer, a drive control unit and a display and interface unit for the latter with a personal computer, and a rotation and fixation drive The turntable is equipped with electric motors connected to the rotary support of the turntable, while the stand is made in the form of a prefabricated vertical support truss with a rigid base, the turntable is made in the form of a system of two frames exceeding the dimensions of the inclinometer, and the fixation unit of the inclinometer, and the first frame is mounted on the rotation supports between the base and the top of the support truss, the second frame - on the rotation supports inside the first frame with the possibility of rotation in a plane passing through the axis of rotation of the first frame, and the fixing unit the inclinometer is installed inside the second frame so that the point of intersection of the axes of rotation of the frames coincides with the center of gravity of these frames, the center of gravity of the fixation unit of the inclinometer and the center of gravity of the inclinometer itself. 2. An automated installation for calibrating inclinometers, comprising a stand with adjusting screws, a rotary table with an inclinometer fixing unit, a rotary table and a rotary table fixing drive, characterized in that it is additionally equipped with anti-aircraft and azimuth angle sensors, an azimuth zero sensor, a zenith zero sensor, a laser a vertical axis sensor, a communication channel with an inclinometer, a drive control unit and a display and interface unit for the latter with a personal computer, and a rotation and fixation drive The turntable is equipped with electric motors connected to the rotary support of the turntable, and the stand is made in the form of a prefabricated vertical support truss with a rigid base, the turntable is made in the form of a system of three frames exceeding the dimensions of the inclinometer, and the fixation unit of the inclinometer, and the first frame is mounted on the rotation supports between the base and the top of the support truss, the second frame - on the rotation supports inside the first frame with the possibility of rotation in a plane passing through the axis of rotation of the first frame, the third frame mounted on rotation supports inside the second frame with the possibility of rotation around its longitudinal axis, coinciding with the longitudinal axis of the inclinometer, and the fixation unit of the inclinometer is installed inside the third frame so that the intersection point of the axes of rotation of the frames coincides with the center of gravity of these frames, the center of gravity of the fixation unit of the inclinometer and the center of gravity of the inclinometer itself.

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