CN113418497B - A calibration device for land monitoring equipment - Google Patents
A calibration device for land monitoring equipment Download PDFInfo
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- CN113418497B CN113418497B CN202110603834.1A CN202110603834A CN113418497B CN 113418497 B CN113418497 B CN 113418497B CN 202110603834 A CN202110603834 A CN 202110603834A CN 113418497 B CN113418497 B CN 113418497B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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Abstract
The invention discloses a calibration device for land monitoring equipment, which comprises: the base, the support frame is connected to the base, the support frame is kept away from the base end and is connected the lever unit, the pressurization unit is connected to the one end of lever unit, the balance adjustment unit is connected to the lever unit, the balance adjustment unit is located the pressurization unit with between the support frame, the balance adjustment unit can be followed the length direction reciprocating sliding of lever unit, the pressurized unit is connected to the other end of lever unit. The invention has simple structure and convenient use, can carry out different tests for many times, improves the calibration accuracy rate and is suitable for calibrating the land monitoring equipment.
Description
Technical Field
The invention belongs to the technical field of soil monitoring equipment calibration, and particularly relates to a calibration device for land monitoring equipment.
Background
In recent years, with the increasing of construction mileage and the increasing of train speed of railway engineering in our country, the coverage area of railway engineering is also expanding, and higher requirements on the safety and stability of engineering are also provided. Due to the influence of factors such as geological conditions and dynamic train loads, the roadbed may deform and even influence the driving safety.
Chinese utility model patent grant publication no: CN210719008U, name: a soil dynamic strain testing device belongs to the field of soil monitoring equipment and comprises a testing column, a bearing disc, a main strain gauge and a temperature compensation strain gauge; the test column is an elastic component; the two pressure bearing discs are respectively and fixedly arranged at two ends of the test column, the disc surfaces of the pressure bearing discs are perpendicular to the long axis of the test column, and the pressure bearing discs and the test column are coaxially arranged; the four main strain gauges surround the long axis of the test column and are uniformly bonded on the test column, and the four main strain gauges are positioned on the same radial surface of the test column; the temperature compensation strain gauge is arranged separately from the test column. The utility model provides a soil body developments testing arrangement that meets an emergency can bury a plurality of underground in test area according to the test demand, can test the dynamic strain of different planar position and the different degree of depth, convenient to use, and the test result is accurate, good reliability. The dynamic strain of the roadbed can be monitored in real time, timely maintenance is carried out, and the stability and the safety of the roadbed are guaranteed. However, due to the structural particularity of the soil dynamic strain sensor, a corresponding calibration device is lacked, so that the calibration test of the soil dynamic strain sensor cannot be effectively carried out.
Disclosure of Invention
The invention solves the defects of the prior art and provides the calibration device for the land monitoring equipment, which is convenient to use and simple in structure.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a calibration arrangement for a land monitoring device comprising: the base is connected with a support frame, the end, far away from the base, of the support frame is connected with a lever unit, one end of the lever unit is connected with a pressurizing unit, the lever unit is connected with a balance adjusting unit, the balance adjusting unit is located between the pressurizing unit and the support frame, the balance adjusting unit can slide in a reciprocating mode along the length direction of the lever unit, and the other end of the lever unit is connected with a pressurizing unit; the compression unit comprises a cross beam, a height adjuster, 2 support rods, an elastic piece, a strain gauge and a pressure tray, wherein the cross beam can be detachably connected with the lever unit, the two ends of the cross beam are vertically connected with the corresponding support rods respectively, the support rods are kept away from the ends of the cross beam and are connected with the pressure tray respectively, the elastic piece is arranged on the upper surface of the pressure tray, the outer side wall of the elastic piece is connected with the strain gauge, the height adjuster can be detachably connected with the support frame, and the height adjuster is located above the elastic piece.
Further, the lever unit comprises a lever, a lever support and a fixed support, one end of the lever support is connected with the support frame, the end, far away from the support frame, of the lever support is rotatably connected with the lever, and the end, close to the pressed unit, of the lever is connected with the fixed support.
Further, the lever support is located at four fifths of the length of the lever.
Furthermore, the pressurizing unit comprises a weight tray, a weight suspension shaft and weights, one end of the weight suspension shaft is detachably connected with the lever unit, the other end of the weight suspension shaft is connected with the weight tray, and the weights are arranged on the upper surface of the weight tray.
Further, the weight suspension shaft is connected to the center of the weight tray.
Further, the balance adjusting unit comprises a sliding seat, a balancing weight and a stop bolt, the sliding seat is connected with the lever unit in a sliding mode, the sliding seat is detachably connected with the balancing weight, the sliding seat is connected with the stop bolt in a threaded mode, and when the stop bolt is located at a stop station, the stop bolt is abutted to the lever unit.
Further, the pressurized unit still includes displacement sensor mounting bracket, displacement sensor, displacement board, 2 conduction poles, the both ends of pressure tray are connected corresponding respectively the conduction pole, each the conduction pole is kept away from pressure tray end fixed connection the displacement board, each the length of conduction pole is less than each the length of bracing piece, the connection can be dismantled to the displacement sensor mounting bracket the support frame, the displacement sensor mounting bracket is connected displacement sensor, displacement sensor is located the top of displacement board, displacement sensor's stress end with the upper surface of displacement board contacts.
Further, the displacement plate is located between 2 bracing pieces, the length of displacement plate is less than 2 the distance between the bracing piece.
Further, the altitude controller includes height adjusting nut, height adjusting screw, height adjusting hand wheel and heightens the screw end cover and constitutes, height adjusting nut connects the support frame, height adjusting hand wheel rotates and connects height adjusting nut, height adjusting screw threaded connection height adjusting hand wheel, height adjusting screw's lower extreme is connected heighten the screw end cover.
Furthermore, the number of the strain gauges is multiple, and the strain gauges are uniformly arranged at intervals along the periphery of the elastic piece.
As the invention adopts the invention, compared with the prior art, the invention has the technical progress that:
the base is connected with the supporting frame, the end, far away from the base, of the supporting frame is connected with the lever unit, one end of the lever unit is connected with the pressurizing unit, the lever unit is connected with the balance adjusting unit, the balance adjusting unit is located between the pressurizing unit and the supporting frame, the balance unit can slide in a reciprocating mode along the length direction of the lever unit, the balance adjusting unit enables the lever unit to be kept horizontal, the influence of the self weight of the lever unit on a calibration test is balanced, and the calibration accuracy is improved; the other end of the lever unit is connected with a compression unit, the compression unit comprises a cross beam, a height adjuster, 2 support rods, an elastic part, a strain gauge and a pressure tray, the cross beam is detachably connected with the lever unit, two ends of the cross beam are respectively and vertically connected with the corresponding support rods, the end, far away from the cross beam, of each support rod is respectively connected with the pressure tray, the elastic part is placed on the upper surface of the pressure tray, the outer side wall of the elastic part is connected with the strain gauge, the height adjuster is detachably connected with a support frame, and the height adjuster is positioned above the elastic part; firstly, an elastic part to be calibrated is placed on a pressure tray, the height adjuster is adjusted to enable the lower surface of the height adjuster to be in contact with the upper surface of the elastic part without generating pressure, the quantity and the weight of weights are adjusted according to the magnitude of required stress, a scale pan is used for loading, due to the lever action, the elastic part in the pressure tray can generate corresponding strain force, the strain force is transmitted and recorded through a strain gauge, and corresponding numerical values of the elastic part in the pressure tray are recorded through tests such as multi-stage loading, multi-stage unloading, multi-time loading and multi-time unloading and the like of the weights in the scale pan, and the accuracy of a calibration result is improved through multi-time calibration of the elastic part; in conclusion, the invention has simple structure and convenient use, can carry out different tests for many times, improves the calibration accuracy rate and is suitable for the calibration of the land monitoring equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a lever according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a lever bracket according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fixing support according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a lever unit, a balance adjusting unit and a pressure unit according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a displacement sensor according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a pressing unit according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a compression unit according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a height adjustment handwheel according to an embodiment of the present invention;
FIG. 10 is a schematic view of a height adjustment nut according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a height adjustment screw according to an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a balance adjustment unit according to an embodiment of the present invention;
FIG. 13 is a schematic view of the structure of a support rod and a conductive rod according to an embodiment of the invention;
FIG. 14 is a schematic structural view of a weight according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of an elastic member according to an embodiment of the invention.
Labeling components: 1-base, 2-support frame, 3-lever unit, 301-lever, 302-lever support, 303-fixed support, 4-pressurizing unit, 401-weight plate, 402-weight suspension shaft, 403-weight, 5-balance adjusting unit, 501-sliding seat, 502-counterweight, 503-stop bolt, 6-pressurizing unit, 601-beam, 602-height adjuster, 603-support rod, 604-elastic piece, 605-strain sheet, 606-pressure plate, 607-displacement sensor mounting rack, 608-displacement sensor, 609-displacement plate, 610-conductive rod, 7-height and low adjusting nut, 8-height adjusting screw, 9-height adjusting handwheel, 10-height adjusting screw end cap.
Detailed Description
The following description is given in conjunction with preferred embodiments of the present invention. It should be understood that the preferred embodiments described herein are only for illustrating and explaining the present invention and are not to be considered as limiting the present invention.
Embodiment is a calibration device for land monitoring equipment
The embodiment discloses a calibration device of a land monitoring device, as shown in fig. 1 and fig. 15, the calibration device comprises a base 1, the base 1 is fixedly connected with a support frame 2 by welding, the base 1 can also be connected with the support frame 2 by bolts, preferably, the base 1 is made of alloy material, the support frame 2 is connected with a lever unit 3 by a pin shaft, the support frame 2 can also be connected with the lever unit 3 by bolts, the lever unit 3 is positioned at the other end of the support frame 2, one end of the lever unit 3 can be fixedly connected with a pressurizing unit 4 by welding, the lever unit 3 can also be connected with the pressurizing unit 4 by bolts, the lever unit 3 can also be connected with the pressurizing unit 4 by hooks, the lever unit 3 is slidably connected with a balance adjusting unit 5, the balance adjusting unit 5 can slide back and forth along the length direction of the lever unit 3 under the action of external force, the balance adjusting unit 5 is positioned between the pressurizing unit 4 and the support frame 2, the other end of the lever unit 3 is connected with the compression unit 6 through a bolt, the compression unit 6 comprises a cross beam 601, a height adjuster 602, 2 support rods 603, an elastic member 604, a strain gauge 605 and a pressure tray 606, the cross beam 601 is connected with the lever unit 3 through a bolt, preferably, the cross beam 601 is made of an alloy material, two ends of the cross beam 601 are respectively fixedly connected with the corresponding support rods 603 through a welding mode, two ends of the cross beam 601 can also be connected with the corresponding support rods 603 through a bolt, the end, far away from the cross beam 601, of each support rod 603 is respectively fixedly connected with the pressure tray 606 through a welding mode, each support rod 603 can also be connected with the pressure tray 606 through a bolt, preferably, the pressure tray 606 is made of an alloy material, the pressure tray 606 is placed on the base 1, the elastic member 604 is placed on the upper surface of the pressure tray 606, and the elastic member 604 is an object capable of having elasticity, the elastic part 604 can also be a Chinese utility model patent with the publication number of CN210719008U, the name of which is the integral device in the soil dynamic strain testing device (for example, the integral device comprises a testing column and is an elastic component), two pressure bearing discs are arranged, two pressure bearing discs are respectively and fixedly arranged at two ends of the testing column, the disc surfaces of the pressure bearing discs are perpendicular to the long axis of the testing column and are coaxially arranged with the testing column, four main strain foils are arranged, four main strain foils are uniformly bonded on the testing column by surrounding the long axis of the testing column, and are all positioned on the same radial surface of the testing column, and temperature compensation strain foils are arranged by being separated from the testing column), the outer side wall of the elastic part can be connected with the strain foils 605 by a bonding mode, preferably, the strain foils 605 are multiple, the strain foils 605 are uniformly arranged at intervals along the periphery of the elastic part 604, each external sensor is connected with the height adjuster 602 by a bolt, and the height adjuster 602 is positioned above the elastic part 604; the balance adjusting unit 5 is adjusted to be located at the position of the lever unit 3, so that the lever unit 3 is kept horizontal, the balance adjusting unit 5 is adjusted to balance the influence of the self weight of the lever unit 3 on a calibration test, and the calibration accuracy is improved; during operation, firstly, the lever unit 3 is kept horizontal by adjusting the balance adjusting unit 5, then the pressure tray 606 is placed on the base 1, the elastic piece 604 to be calibrated is placed on the pressure tray 606, the strain gauge 605 of the elastic piece 604 is externally connected with the sensor through an electric wire, the height adjuster 602 is adjusted to enable the lower end surface of the height adjuster 602 to be just contacted with the upper surface of the elastic piece 604 without generating pressure, the weight of the pressurizing unit 4 is adjusted according to the magnitude of the required stress, the pressure tray 606 exerts an upward pressure on the elastic piece 604 due to the lever action to enable the elastic piece 604 to generate an upward displacement to enable the elastic piece 604 to generate a strain force, the strain force generated by the elastic piece 604 is transmitted to the sensor through the strain gauge 605 and records a numerical value, and the strain test value obtained by loading, unloading and the like for multiple times, and recording corresponding numerical values through the sensor, so as to provide reference data in practical application; the advantage of this embodiment lies in that, adopt above-mentioned setting, simple structure, convenient to use have improved and have markd the rate of accuracy.
A preferred structure of the lever unit 3 of this embodiment is, as shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the lever unit 3 includes a lever 301, a lever support 302, and a fixing support 303, preferably 2 lever supports 302, 2 lever supports 302 are arranged at intervals along the thickness direction of the support frame 2, one end of each lever support 302 is fixedly connected to the support frame 2 by welding, one end of each lever support 302 is further connected to the support frame 2 by bolts, 2 lever supports 302 are rotatably connected to the lever 301 away from the end of the support frame 2, the lever 301 is located between the 2 lever supports 302, preferably the lever 301 is made of alloy material, the lever support 302 provides a support point for the lever 301, so that the lever 301 can rotate along the support point, preferably the lever support 302 is located at about five times the length of the lever 301, the lever 301 is connected to the fixing support 303 by welding, the lever 301 is further connected to the fixing support 303 by bolts, the fixing support 303 is located at the end 4 of the lever 301, and the fixing support 303 is detachably connected to the cross beam 601, and this arrangement increases the stability of the cross beam 601, thereby the advantage that the lever 301 is convenient to install and increase the stability of the lever.
A preferred structure of the pressurizing unit 4 of this embodiment is, as shown in fig. 1, 7 and 14, the pressurizing unit 4 includes a weight tray 401, a weight suspension shaft 402 and weights 403, one end of the weight suspension shaft 402 can be connected with the lever unit 3 through a bolt, the weight suspension shaft 402 can also be connected with the lever unit 3 through a welding manner, the other end of the weight suspension shaft 502 can be fixedly connected with the weight tray 401 through a welding manner, the weight suspension shaft 502 can also be connected with the weight tray 401 through a bolt, the weight tray 401 is preferably of a circular rigid structure, the weight suspension shaft 402 is preferably connected with the center of the weight tray 401, i.e. the connection between the weight suspension shaft 402 and the weight tray 401 is located at the center of the weight tray 401, the weights 403 are placed on the upper surface of the weight tray 401, the weights 403 are multiple, and the weight of each weight 403 is different from each other, this arrangement can facilitate the selection of a suitable combination of weights 403 or 403 to achieve a required stress, and also increase the stability of the weight tray 401, thereby increasing the calibration accuracy, thereby having the advantages that the above arrangement is adopted, the stability is increased, and the calibration accuracy is increased.
A preferable structure of the balance adjusting unit 5 of this embodiment is, as shown in fig. 1, 5, and 12, the balance adjusting unit 5 includes a sliding seat 501, a counterweight 502, and a stop bolt 503, the sliding seat 501 is slidably connected to the lever unit 3, the sliding seat 501 can slide back and forth along the length direction of the lever unit 3, and this arrangement facilitates adjusting the position of the balance adjusting unit 5, so as to keep the lever unit 3 horizontal, counteract the self weight of the lever unit 3, and improve the calibration accuracy; sliding seat 501 accessible bolted connection balancing weight 502, sliding seat 501 can also threaded connection balancing weight 502, balancing weight 502 is conveniently changed in this kind of setting, sliding seat 501 threaded connection locking bolt 503, preferred locking bolt 503 is the bolt, when locking bolt 503 is in the locking station, locking bolt 503 and lever unit 3 looks butt, this kind of setting makes balance adjustment unit 5's stability increase, calibration accuracy has been improved, the advantage of this embodiment lies in from this, adopt the above-mentioned setting, high durability and convenient use, stability increases, calibration accuracy has been improved.
A preferred structure of the compression unit 6 of this embodiment is, as shown in fig. 1, 5, 6, 8, and 13, the compression unit 6 further includes a displacement sensor mounting bracket 607, a displacement sensor 608, a displacement plate 609, and 2 conductive rods 610, two ends of the pressure tray 606 are respectively fixedly connected to the corresponding conductive rods 610 by welding, two ends of the pressure tray 606 can be further connected to the corresponding conductive rods 610 by bolts, an end of the conductive rod 610 far from the pressure tray 606 is fixedly connected to the displacement plate 609 by welding, the conductive rod 610 can be further connected to the displacement plate 609 by bolts, preferably, the conductive rod 610 is a length-adjustable conductive rod, the length-adjustable conductive rod can be connected by a screw, a pin, or other connection manners, such as this arrangement facilitates adjusting a position of the displacement plate 609, and 2 conductive rods 610 are respectively located at two ends of the displacement plate 609, the length of the displacement plate 609 can be larger than the distance between 2 support rods 603, that is, 2 conductive rods 610 are respectively located outside the 2 support rods 603, and 2 support rods 603 pass through the displacement plate 609, in this setting, two through holes are formed in the positions where the support rods 603 pass through the displacement plate 609 by a tapping machine, the diameters of the through holes are larger than the diameters of the corresponding support rods 603, such setting enables the support rods 603 to pass through the displacement plate 609 without contacting the displacement plate 609, no friction force is generated, and the calibration accuracy is improved, preferably, the displacement plate 609 is located between 2 support rods 603, the length of the displacement plate 609 is smaller than the distance between 2 support rods 603, the length of each conductive rod 610 is smaller than the length of each support rod 603, the displacement sensor mounting rack 607 is connected with the support frame 2 through bolts, the displacement sensor mounting rack 607 is connected with the displacement sensor 608 through bolts, and the displacement sensor 608 is located above the displacement plate 609, the force bearing end of the displacement sensor 608 is in contact with the upper surface of the displacement plate 609, the calibrated actual displacement value of the elastic part 604 can be recorded through the arrangement, the calibrated actual displacement value of the elastic part 604 and the test value are fitted, the calibration accuracy is improved, an empirical formula of the test value and the actual displacement value is obtained, and a foundation is laid for a subsequent model test; the advantage of this embodiment lies in from this, adopts above-mentioned setting, and convenient the regulation has improved the mark rate of accuracy.
A preferred structure of the height adjuster 602 in this embodiment is, as shown in fig. 1, fig. 8, fig. 9, fig. 10, and fig. 11, the height adjuster 602 includes a height adjusting nut 7, a height adjusting screw 8, a height adjusting hand wheel 9, and a height adjusting screw end cover 10, the height adjusting nut 7 is connected to the support frame 2 through a bolt, the height adjusting hand wheel 9 is rotatably connected to the height adjusting nut 7, the height adjusting screw 8 is connected to the height adjusting hand wheel 9 through a thread, a lower end of the height adjusting screw 8 is connected to the adjusting screw end cover 10 through a bolt, the lower end of the height adjusting screw 8 can also be rotatably connected to the adjusting screw end cover 10, the height adjusting screw 8 can be connected to the adjusting screw end cover 10 through a connecting column, the height adjusting screw 8 can also be directly connected to the adjusting screw end cover 10, the setting enables the height adjusting screw end cover 10 to approach to and be away from an upper surface of the elastic member 604 to be calibrated through forward and backward rotations of the height adjusting hand wheel 9, the setting is convenient to use, the adjustment accuracy is high, the adjustment accuracy is small, and the calibration accuracy is improved.
The working principle of the embodiment of the invention is as follows:
in operation, firstly, the lever 301 is kept horizontal by adjusting the balance adjusting unit 5, then the pressure tray 606 is placed on the base 1, the elastic member 604 to be calibrated is placed on the pressure tray 606, the strain gauge 605 of the elastic member 604 is externally connected with a sensor through an electric wire, the lower end face of the heightening screw end cap 10 is just contacted with the upper surface of the elastic member 604 through the positive rotation of the height adjusting hand wheel 9 without generating pressure, the displacement sensor 608 is adjusted, the stressed end face of the displacement sensor 608 is contacted with the upper surface of the displacement plate 609, the weight of the weight 403 in the weight tray 401 is adjusted according to the required stress, the pressure tray 606 applies an upward pressure to the elastic member 604 due to the action of the lever 301, the elastic member 604 generates an upward displacement, the strain force of the elastic member 604 is generated, the strain force generated by the elastic member 604 is transmitted to the sensor through the strain gauge 605, and records numerical values, and the pressure tray 606 applies an upward displacement to the displacement plate 609 through the conductive rod 610 to cause the displacement plate 609 to generate displacement, the displacement of the displacement plate 609, the displacement plate 609 records numerical values through the displacement sensor 609, the displacement, the measured values of the strain gauge 604 and the actual loading values and the actual loading data of the weight on the weight 401 are recorded by the multi-loaded weight, and the test tray and the actual loading data are recorded by the test board 403, and the actual loading test data.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. A calibration device for land monitoring equipment, its characterized in that: the method comprises the following steps: the base (1), the base (1) is connected with a support frame (2), the end, far away from the base (1), of the support frame (2) is connected with a lever unit (3), one end of the lever unit (3) is connected with a pressurizing unit (4), the lever unit (3) is connected with a balance adjusting unit (5), the balance adjusting unit (5) is located between the pressurizing unit (4) and the support frame (2), the balance adjusting unit (5) can slide in a reciprocating mode along the length direction of the lever unit (3), and the other end of the lever unit (3) is connected with a compression unit (6);
the compression unit (6) comprises a cross beam (601), a height adjuster (602), 2 support rods (603), an elastic piece (604), a strain gauge (605) and a pressure tray (606), the cross beam (601) is detachably connected with the lever unit (3), two ends of the cross beam (601) are respectively and vertically connected with the corresponding support rods (603), the end, far away from the cross beam (601), of each support rod (603) is respectively connected with the pressure tray (606), the elastic piece (604) is placed on the upper surface of the pressure tray (606), the outer side wall of the elastic piece (604) is connected with the strain gauge (605), the height adjuster (602) is detachably connected with the support frame (2), and the height adjuster (602) is located above the elastic piece (604);
the compression unit (6) further comprises a displacement sensor mounting frame (607), a displacement sensor (608), a displacement plate (609) and 2 conductive rods (610), wherein two ends of the pressure tray (606) are respectively connected with the corresponding conductive rods (610), each conductive rod (610) is fixedly connected with the displacement plate (609) far away from the pressure tray (606), the length of each conductive rod (610) is smaller than that of each supporting rod (603), the displacement sensor mounting frame (607) is detachably connected with the supporting frame (2), the displacement sensor mounting frame (607) is connected with the displacement sensor (608), the displacement sensor (608) is located above the displacement plate (609), and the stressed end of the displacement sensor (608) is in contact with the upper surface of the displacement plate (609);
the lever unit (3) comprises a lever (301), a lever support (302) and a fixed support (303), one end of the lever support (302) is connected with the support frame (2), the end, far away from the support frame (2), of the lever support (302) is rotatably connected with the lever (301), the end, close to the compression unit (6), of the lever (301) is connected with the fixed support (303), and the lever support (302) is located at four fifths of the length of the lever (301);
the pressurizing unit (4) comprises a weight tray (401), a weight suspension shaft (402) and weights (403), one end of the weight suspension shaft (402) is detachably connected with the lever unit (3), the other end of the weight suspension shaft (402) is connected with the weight tray (401), and the weights (403) are arranged on the upper surface of the weight tray (401).
2. Calibration device for land monitoring equipment according to claim 1, characterized in that: the weight suspension shaft (402) is connected to the center of the weight tray (401).
3. Calibration device for land monitoring equipment according to claim 1, characterized in that: the balance adjusting unit (5) comprises a sliding seat (501), a balancing weight (502) and a stop bolt (503), the sliding seat (501) is connected with the lever unit (3) in a sliding mode, the sliding seat (501) is detachably connected with the balancing weight (502), the sliding seat (501) is connected with the stop bolt (503) in a threaded mode, and when the stop bolt (503) is located at a stop station, the stop bolt (503) is abutted to the lever unit (3).
4. Calibration device for land monitoring equipment according to claim 1, characterized in that: the displacement plate (609) is positioned between 2 support rods (603), and the length of the displacement plate (609) is smaller than the distance between 2 support rods (603).
5. Calibration device for land monitoring equipment according to claim 4, characterized in that: altitude controller (602) includes height adjusting nut (7), height adjusting screw (8), height adjusting hand wheel (9) and heightening screw end cover (10) and constitutes, height adjusting nut (7) are connected support frame (2), height adjusting hand wheel (9) are rotated and are connected height adjusting nut (7), height adjusting screw (8) threaded connection height adjusting hand wheel (9), the lower extreme of height adjusting screw (8) is connected heightening screw end cover (10).
6. Calibration device for land monitoring equipment according to claim 5, characterized in that: the strain gauges (605) are arranged in a plurality, and the strain gauges (605) are uniformly arranged along the periphery of the elastic piece (604) at intervals.
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| CN107782635A (en) * | 2017-09-26 | 2018-03-09 | 河海大学 | Soil in-situ shearing test device |
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| 基坑全过程开挖现场监测与数值模拟分析;刘建勇;《2020年工业建筑学术交流会论文集（下册）》;20201121;全文 * |
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