CN109458996B - Movable target instrument convenient to use - Google Patents
Movable target instrument convenient to use Download PDFInfo
- Publication number
- CN109458996B CN109458996B CN201811385144.8A CN201811385144A CN109458996B CN 109458996 B CN109458996 B CN 109458996B CN 201811385144 A CN201811385144 A CN 201811385144A CN 109458996 B CN109458996 B CN 109458996B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 47
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
The invention discloses a movable target instrument convenient to use, which comprises a base and a measuring bracket, wherein the base can be fixed on a mounting base of a measuring point, the measuring bracket can be arranged on the base in a left-right moving way, the measuring point is positioned between the fixed target instrument and a measuring instrument arranged at an observation point, a measuring reference is arranged on the front side surface of the measuring bracket, an adjusting mechanism capable of adjusting the levelness of the base is arranged at the bottom of the base, measuring scales for measuring the displacement value of the measuring bracket relative to the base are respectively arranged on the front side and the rear side of the base, and reference scales are arranged at the bottom of the measuring bracket and close to the measuring scales. The invention can be suitable for observation and use of different positions, and ensures the accuracy of measurement data reading.
Description
Technical Field
The invention relates to the technical field of building engineering detection, in particular to a movable target instrument convenient to use.
Background
For engineering structures such as dams, dust dams, embankments, ship locks, retaining walls and the like, after the construction is completed and a certain time passes, certain displacement can be generated due to the action of various loads, and when the displacement reaches a certain degree, the engineering structures are damaged, even disastrous results are generated. Therefore, the deformation of the engineering structure needs to be monitored regularly so as to master the displacement change rule of the engineering structure, predict the future deformation development trend and provide scientific basis for the reinforcement treatment of the engineering structure.
In the prior art, a sight line observation method is one of effective means for monitoring the horizontal displacement of an engineering structure, when the horizontal displacement of the engineering structure is monitored by the sight line method, a stable observation point is needed to be found at one side of the engineering structure, and then a sight gauge is arranged at the observation point; a stable fixed point is found at the other side of the engineering structure, a fixed target is arranged at the fixed point, and the sighting instrument observes the fixed target to form a virtual sighting line. Then a measuring point with a mounting base is arranged on the engineering structure corresponding to the sight line position, and a movable target instrument is arranged on the mounting base of the measuring point. The movable target instrument comprises a base which can be fixed on a mounting base of a measuring point, a measuring bracket arranged on the base, a horizontal adjusting mechanism arranged on the base, a vernier which can measure the left and right displacement of the measuring bracket and arranged on the rear side surface of the lower part of the measuring bracket, and a measuring reference arranged on the front side surface of the measuring bracket. When measurement is needed, the movable target instrument is fixed on a corresponding measuring point of an engineering structure, and the front side surface of the measuring bracket with a measuring reference is opposite to the sight instrument through adjusting the horizontal adjusting mechanism. When we move the measuring bracket left and right, the measuring standard on the upper part of the measuring bracket can be positioned on the sight line. Recording the current reading of the vernier on the rear side of the measuring bracket at the moment, namely the initial position of the engineering structure. When the same method is used for measuring again after a fixed time interval, a new current reading of the vernier is obtained, and the difference between the current reading and the previous reading is calculated, so that the displacement value of the engineering structure can be known.
However, existing active targets for line-of-sight observation suffer from the following drawbacks: when we need to observe the positions of the dam section of the flood discharge gate of the dam, the two wings of the outlet of the culvert of the dike, and the like, one side of the observation point is suspended, that is, only one side of the observation point can be used for standing people for observation, and the other side cannot be used for standing people for observation. The existing movable target is of a structure with front side aiming and rear side reading, that is, the movable target must have the front side opposite to the sighting device so that the sighting device aims at measuring the reference on the measuring support. Therefore, when the rear side of the movable target is suspended, the observer can only stand on the side for reading, thereby affecting the accuracy of reading and causing difficulty in measurement.
Disclosure of Invention
The invention aims to solve the problems that an observation angle of a movable target instrument used for a sight line observation method is limited and observation points at different positions cannot be adapted, and provides a movable target instrument convenient to use, which can adapt to observation and use at different positions and ensure accuracy in measurement data reading.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a movable target appearance that facilitates use, includes the base that can fix on the mounting base of measuring point, can control the measurement support that sets up on the base with moving, measuring point is located between fixed target appearance and the measuring apparatu of setting at the observation point, is equipped with the measurement benchmark at the leading flank of measurement support, is equipped with the adjustment mechanism of adjustable base levelness in the bottom of base, is equipped with the measurement scale that is used for measuring the displacement value of measurement support relative to base respectively at the leading side, the rear side of base, is equipped with the benchmark scale near the measurement scale position in measurement support bottom.
When the displacement value of the measuring point is required to be measured, firstly, the movable target instrument is placed on the mounting base of the measuring point, then, the measuring support is moved left and right until the measuring standard on the measuring support is calibrated by the measuring instrument such as the sighting instrument arranged at the observing point, at the moment, the metering scale corresponding to the standard scale is the current displacement measured value, the current displacement measured value minus the upper displacement measured value is the current displacement value, and the current displacement measured value minus the first displacement measured value is the accumulated displacement value. In particular, the invention has metering scales for metering the displacement value of the measuring bracket relative to the base at the front side and the rear side of the base, respectively, so that the measuring staff can conveniently observe the displacement measurement value at the present time in front of or behind the movable target instrument. When the front of the measuring point is suspended, a measuring person can read the current displacement measured value from the rear of the movable target instrument; conversely, when the rear of the measuring point is suspended, the measuring person can read the displacement measurement value in the meantime from the front of the movable target, so that the movable target can adapt to the observation and use of different positions, and the accuracy of the measurement data reading is ensured.
Preferably, the base is provided with a horizontal sliding groove, the bottom of the measuring bracket is slidably connected in the sliding groove, a rotatable rotating fluted disc is arranged at the side of the sliding groove on the base, a scale disc is fixedly connected to the lower side of the rotating fluted disc, the side surface of the bottom of the measuring bracket is provided with a driving rack meshed with the rotating fluted disc, metering scales are respectively arranged at the front side, the left side and the right side edge of the scale disc, and front, left and right 3 reference scales corresponding to the metering scales are arranged on the base.
When the movable target instrument is placed on the mounting base of the measuring point, the measuring support can be horizontally moved left and right, and at the moment, the driving rack at the lower part of the measuring support drives the rotating fluted disc to rotate, so that the scale disc is driven to rotate. The reference scale on the base can show the metering scale corresponding to the level displacement value of the measuring bracket on the scale disc. Because the front side, the rear side, the left side and the right side of the scale disc are provided with the metering scales, a measurer can stand on any side of the movable target instrument to conveniently observe the measurement data, so that the movable target instrument can fully adapt to the requirements of different measurement places.
Preferably, a tensioning chute perpendicular to the front side surface of the measuring support is formed in the base, the lower end of the rotating shaft of the rotating fluted disc is adapted in the tensioning chute, a tensioning pressure spring for propping against the rotating shaft of the rotating fluted disc is arranged in the tensioning chute, and the tensioning pressure spring drives the rotating fluted disc to tightly cling to the driving rack.
Because the lower end of the rotating shaft of the rotating fluted disc is movably arranged in the tensioning chute, the tensioning pressure spring can push the rotating fluted disc to transversely move and tightly lean against the driving rack, so that the meshing gap between the rotating fluted disc and the driving rack is effectively eliminated, and the measuring precision is improved.
Preferably, the rotary fluted disc comprises a circular rotary disc body, an annular U-shaped groove is formed in the circumferential surface of the rotary disc body, a radially extending baffle ring is formed at the upper edge and the lower edge of the rotary disc body, a plurality of threaded holes penetrating through the lower baffle ring are formed in the upper baffle ring, the threaded holes are uniformly distributed in the circumferential direction of the rotary disc body, pin shafts are arranged at the positions, corresponding to the threaded holes, of the upper baffle ring and the lower baffle ring, conical positioning holes are respectively formed in the upper end and the lower end of the pin shaft, positioning screws are respectively connected with the threaded holes of the upper baffle ring and the lower baffle ring in a threaded manner, positioning heads which are matched in the positioning holes are formed by axial extension of inner ends of the positioning screws between the upper baffle ring and the lower baffle ring, and when the measuring support moves left and right, the pin shafts on the rotary fluted disc sequentially enter tooth grooves of the driving rack, so that the driving rack and the rotary fluted disc are meshed with each other.
It is known that the existing gear machining has large machining errors, and in order to improve the machining precision, expensive high-precision machining equipment is required. In particular, because the torque and load born by the rotary fluted disc are extremely small, the invention firstly arranges threaded holes on the upper baffle ring and the lower baffle ring of the rotary fluted disc body, then a pin shaft is arranged between the upper baffle ring and the lower baffle ring corresponding to the threaded holes, and the pin shaft is fixed between the upper baffle ring and the lower baffle ring through positioning screws at the upper end and the lower end. That is, the pin acts as a "tooth". Since the threaded holes can be machined by some simple machining equipment, the threaded holes are uniformly distributed in the axial direction by injecting tools such as dividing plates. In addition, the positioning head at the end part of the positioning screw and the conical positioning hole have good automatic centering effect, so that the position accuracy of each pin shaft can be ensured. That is, the present invention makes it possible to produce rotary fluted disc with high precision and easy machining.
Preferably, a front calibration hole is formed in the upper portion of the front side surface of the measuring support, the front calibration hole forms the measuring standard, a calibration surface parallel to the front side surface of the measuring support is formed in the rear of the measuring support, a rear calibration hole coaxial with the front calibration hole is formed in the calibration surface, the measuring instrument is a laser emitter, when the micro-movement of the measuring point is measured, the laser emitter is used for emitting laser beams to the fixed target instrument, then the measuring support is moved left and right, the laser beams are aligned to the front calibration hole, the levelness of the base is adjusted through the adjusting mechanism until the laser beams pass through the front calibration hole and the rear calibration hole and irradiate the fixed target instrument at the same time, and the measuring scale value corresponding to the standard scale is the current displacement measuring value.
It is known that when measuring the horizontal displacement of an engineering structure by means of a line of sight observation, the front side of the measuring support of the movable target, which has a measuring reference, is directed against the collimator, i.e. the line of sight is perpendicular to the measuring reference. Therefore, the invention uses a laser transmitter to replace the existing sighting instrument, a front calibration hole is arranged at the upper part of the front side surface of the measuring bracket, a rear calibration hole coaxial with the front calibration hole is arranged on the calibration surface, and the laser beam emitted by the laser transmitter becomes a visual sighting line. When the light beam emitted by the laser emitter passes through the front and rear calibration holes and irradiates the fixed target instrument, the measuring bracket is proved to be perpendicular to the sight line, so that the displacement measurement can be accurately performed. When the state of the measuring bracket needs to be adjusted, the measuring bracket can be moved first, so that the laser beam passes through the front calibration hole and irradiates the calibration surface, and a measuring person can clearly see the deviation between the rear calibration hole and the sight line. The measuring stand and the sighting line can be maintained in a vertical state rapidly by adjusting the horizontal adjusting mechanism on the base, and the laser beam passes through the front and rear calibration holes and irradiates the fixed target instrument. That is, the invention can make the measuring staff intuitively, conveniently and quickly keep the measuring bracket vertical to the sight line.
Therefore, the invention has the following beneficial effects: the method is suitable for observation and use of different positions, and ensures the accuracy of measurement data reading.
Drawings
Fig. 1 is a schematic view of the structure of the front side of the first embodiment of the present invention.
Fig. 2 is a schematic view of the structure of the rear side of the first embodiment of the invention.
Fig. 3 is a schematic view of the structure of the front side of the second embodiment of the present invention.
Fig. 4 is a schematic view of the structure of the rear side of the second embodiment of the present invention.
Fig. 5 is a schematic view of a structure of a rotary toothed disc.
In the figure: 1 a base 11, a sliding groove 12, a metering scale 13, a tensioning sliding groove 2, a measuring bracket rod 21, a reference scale 22, a driving rack 23, a measuring reference 24, a front calibration hole 3, a rotating fluted disc 31, a rotating shaft 32, a rotating disc body 321, a U-shaped groove 33, a baffle ring 331, a threaded hole 34, a pin 341, a positioning hole 35, a positioning screw 351, a positioning head 4, a scale disc 5, a tensioning pressure spring 6, a calibration plate 61, a calibration surface 62 and a rear calibration hole.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1 and 2, a movable target for convenient use is suitable for measuring displacement conditions of various measuring points of an engineering structure such as a dam by using a sight line observation method, and of course, we need to provide a mounting base for placing the movable target at the measuring points, and also provide an observation point for placing a measuring instrument at a fixed position on one side of the engineering structure, and provide a fixed point for placing a fixed target at a fixed position on the other side of the engineering structure. The measuring device specifically comprises a base 1 which can be fixed on a mounting base of a measuring point, a measuring bracket 2 which is arranged on the base, and a horizontal sliding groove 11 which is arranged on the base, wherein the bottom of the measuring bracket is slidably connected in the sliding groove, so that the measuring bracket can move left and right on the base. In addition, a measuring reference 23 is arranged on the front side surface of the measuring bracket, an adjusting mechanism capable of adjusting the levelness of the base is arranged at the bottom of the base, a measuring scale 12 is arranged on the front side of the base, a measuring scale is also arranged on the rear side of the base, the measuring scale comprises a zero scale at the middle position and a unilateral moving scale formed by extending the zero scale to two sides, and a reference scale 21 aligned with the zero scale is arranged at the bottom of the measuring bracket and close to the measuring scale. It will be appreciated that the adjustment mechanism may be a tripod-mounted adjustment mechanism similar to a camera, as such techniques are well known in the art and will not be described in any great detail herein.
When the displacement value of a certain measuring point of an engineering structure needs to be measured, a measuring instrument such as a sighting instrument is arranged at an observation point, a fixed target instrument is arranged at a fixed point, and then the sighting instrument is adjusted to enable the sighting instrument to be aligned with the fixed target instrument, so that a virtual sighting line is formed between the sighting instrument and the fixed target instrument. Then the movable target instrument is placed on the mounting base of the measuring point, the base is kept in a horizontal state by adjusting the adjusting mechanism at the bottom of the base, the aim of the sight instrument at the measuring standard of the front side surface of the measuring support is ensured, the front side surface of the measuring support at the moment is in a vertical state of a vertical horizontal plane, and the sight line is vertical to the front side surface of the measuring support. Recording the metering scale value corresponding to the reference scale at the moment, namely the original position measured value of the measuring point. After a certain time interval, the measuring point generates displacement to a certain extent, the steps can be repeated, the metering scale corresponding to the reference scale is the current displacement measured value, and the current displacement measured value is subtracted by the original position measured value to obtain the current displacement value. Similarly, when the measurement is performed again later, the measurement scale corresponding to the reference scale is a new current displacement measurement value, the current displacement measurement value obtained in the previous measurement is subtracted from the current displacement measurement value to obtain a new current displacement value, and the current displacement measurement value is subtracted from the original position measurement value to obtain an accumulated displacement value.
From the above description, it follows that the movable target must remain in the same direction for each measurement, i.e. the front side of the measuring support is facing the measuring instrument. It will be appreciated that since the front and rear sides of the base are provided with respective measuring scales for measuring the displacement values of the support relative to the base, a measuring person can conveniently observe the current displacement measurements in front of or behind the movable target. When the front of the measuring point is suspended, a measuring person can read the current displacement measured value from the rear of the movable target instrument; conversely, when the rear of the measuring point is suspended, the measuring person can read the displacement measurement value in the meantime from the front of the movable target, so that the movable target can adapt to the observation and use of different positions, and the accuracy of the measurement data reading is ensured.
In order to observe the measurement result conveniently, as shown in fig. 3 and 4, a rotatable rotary fluted disc 3 is arranged at the side of the sliding groove on the base, the rotary shaft of the rotary fluted disc is vertically arranged, a scale disc 4 is fixedly connected to the lower side of the rotary fluted disc, a driving rack 22 meshed with the rotary fluted disc is arranged at the front side of the bottom of the measurement support, metering scales are respectively arranged at the front side, the left side and the right side of the scale disc, and accordingly, front, left and right 3 reference scales corresponding to the metering scales are arranged on the base.
When the movable target instrument is placed on the mounting base of the measuring point, the measuring support can be horizontally moved left and right, and at the moment, the driving rack at the lower part of the measuring support drives the rotating fluted disc to rotate, so that the scale disc is driven to rotate. The reference scale on the base can show the metering scale corresponding to the level displacement value of the measuring bracket on the scale disc. Because the front side, the rear side, the left side and the right side of the scale disc are provided with the metering scales, a measurer can stand on any side of the movable target instrument to conveniently observe the measurement data, so that the movable target instrument can fully adapt to the requirements of different measurement places.
It will be appreciated that when the measuring bracket is displaced, the drive rack will drive the rotating toothed disc to rotate around the same circumference. Therefore, the outer diameter of the scale disc and the reference circle diameter of the rotary fluted disc can be the same, so that a one-to-one relationship is formed between the metering scale on the scale disc and the displacement value of the measuring bracket. Alternatively, the outer diameter of the scale disc is 2 times of the diameter of the scale circle of the rotary fluted disc, and accordingly, a two-to-one relationship is formed between the metering scale on the scale disc and the displacement value of the measuring bracket. That is, the displacement value is enlarged by the scale, so that the scale can display the displacement value more accurately.
In this embodiment, the direction of rotating the fluted disc is defined by the direction of the measuring bracket.
In order to improve the measurement accuracy, as shown in fig. 5, a tensioning chute 13 perpendicular to the front side of the measurement bracket can be arranged on the base, the lower end of a rotating shaft 31 of the rotating fluted disc is adapted in the tensioning chute, a tensioning pressure spring 5 for pressing the rotating shaft of the rotating fluted disc is arranged in the tensioning chute, one end of the tensioning pressure spring presses the end of the tensioning chute, and the other end of the tensioning chute presses the side surface of the rotating shaft, so that the tensioning pressure spring drives the rotating fluted disc to be tightly attached to the driving rack, and the meshing gap between the rotating fluted disc and the driving rack is effectively eliminated, thereby being beneficial to improving the measurement accuracy.
In order to improve the manufacturing accuracy of the rotary fluted disc, the rotary fluted disc comprises a circular rotary disc body 32, and an annular U-shaped groove 321 is arranged on the circumferential surface of the rotary disc body, so that radially extending baffle rings 33 are formed at the upper edge and the lower edge of the rotary disc body. In addition, a plurality of threaded holes 331 penetrating the lower baffle ring downwards are formed in the upper baffle ring, the threaded holes are uniformly distributed in the circumferential direction of the rotating disc body, and pin shafts 34 are arranged between the upper baffle ring and the lower baffle ring and correspond to the threaded holes. Conical locating holes 341 are formed in the upper end and the lower end of the pin shaft respectively, a vertical downward locating screw 35 is connected in a threaded hole of the upper baffle ring in a threaded mode, a vertical upward locating screw is connected in a threaded hole of the lower baffle ring in a threaded mode, and a locating head 351 which is matched in a locating hole of the corresponding end of the pin shaft is formed by axially extending the inner end of the locating screw between the upper baffle ring and the lower baffle ring, so that the pin shaft and the threaded hole are automatically centered, and the locating precision of the pin shaft is facilitated to be achieved. When the measuring bracket moves left and right, the pin shafts on the rotating fluted disc sequentially enter the tooth grooves of the driving rack, so that the driving rack and the rotating fluted disc are meshed with each other. That is, the pin at this time acts as a "tooth".
Further, as shown in fig. 3 and 4, a front calibration hole 24 is provided at the upper part of the front side of the measuring bracket, the front calibration hole constitutes the measuring reference, and a vertical calibration plate 6 is provided at the rear of the measuring bracket, and the front side of the calibration plate becomes a calibration surface 61 parallel to the front side of the measuring bracket. Furthermore, a rear alignment hole 62 is provided on the alignment surface coaxially with the front alignment hole, of course the axes of the front and rear alignment holes should be perpendicular to the front side of the measuring bracket. And the measuring instrument adopts a laser emitter. Thus, when it is desired to measure the nuances of the measuring points, the laser light beam is first directed by the laser light emitter toward the stationary target, where the laser light beam forms a visual line of sight. Then, a movable target instrument is placed, and the measuring support is moved left and right, so that the laser beam is aligned with the front calibration hole; and then, the levelness of the base is regulated by the regulating mechanism until the laser beams pass through the front and rear calibration holes and irradiate the fixed target instrument at the same time, and the fact that the axes of the front and rear calibration holes are positioned on a sight line formed by the laser beams is proved, and the measuring bracket is perpendicular to the sight line, so that displacement measurement can be accurately carried out. The measurement scale value corresponding to the reference scale is the current displacement measurement value.
Claims (5)
1. The utility model provides a movable target instrument that facilitates use, includes the base that can fix on the mounting base of measuring point, but the measurement support of setting on the base of moving about, the measuring point is located between fixed target instrument and the measuring apparatu of setting at the observation point, is equipped with the measurement benchmark in the leading flank of measurement support, is equipped with the adjustment mechanism of adjustable base levelness in the bottom of base, and characterized by, be equipped with the measurement scale that is used for measuring the displacement value of measurement support relative to base respectively in leading flank, rear side of base, the measurement scale includes the zero scale of intermediate position, and by the unilateral removal scale that zero scale extends to both sides and form, is equipped with the benchmark scale in measuring support bottom near the measurement scale position;
the base is provided with a horizontal sliding groove, the bottom of the measuring bracket is connected in the sliding groove in a sliding way, a rotatable rotary fluted disc is arranged on the base at the side of the sliding groove, and a driving rack meshed with the rotary fluted disc is arranged on the side surface of the bottom of the measuring bracket;
the upper part of the front side surface of the measuring bracket is provided with a front calibration hole, the front calibration hole forms the measuring reference, the rear of the measuring bracket is provided with a calibration surface parallel to the front side surface of the measuring bracket, and the calibration surface is provided with a rear calibration hole coaxial with the front calibration hole.
2. The movable target instrument according to claim 1, wherein a scale disc is fixedly connected to the lower side of the rotary fluted disc, metering scales are respectively arranged at the front side, the left side and the right side of the scale disc, and front, left and right 3 reference scales corresponding to the metering scales are arranged on the base.
3. The movable target instrument convenient to use according to claim 2, wherein a tensioning chute perpendicular to the front side surface of the measuring support is arranged on the base, the lower end of the rotating shaft of the rotating fluted disc is adapted in the tensioning chute, a tensioning pressure spring for pressing the rotating shaft of the rotating fluted disc is arranged in the tensioning chute, and the tensioning pressure spring drives the rotating fluted disc to tightly lean against the driving rack.
4. The movable target instrument according to claim 2, wherein the rotary toothed disc comprises a circular rotary disc body, annular U-shaped grooves are formed in the circumferential surface of the rotary disc body, so that radially extending baffle rings are formed at the upper edge and the lower edge of the rotary disc body, a plurality of threaded holes penetrating through the lower baffle rings are formed in the upper baffle rings, the threaded holes are uniformly distributed in the circumferential direction of the rotary disc body, pin shafts are arranged between the upper baffle rings and the lower baffle rings at the positions corresponding to the threaded holes, conical positioning holes are respectively formed at the upper end and the lower end of the pin shaft, positioning screws are respectively connected in the threaded holes of the upper baffle rings and the lower baffle rings in a threaded manner, positioning heads which are matched in the positioning holes are formed by axially extending inner ends of the positioning screws between the upper baffle rings and the lower baffle rings, and when the measuring support moves leftwards and rightwards, the pin shafts on the rotary toothed disc sequentially enter tooth grooves of the driving rack, so that the driving rack and the rotary toothed disc are mutually meshed.
5. The movable target instrument according to claim 1, 2, 3 or 4, wherein the measuring instrument is a laser emitter, when the micro-movement of the measuring point is measured, the laser emitter is used to emit a laser beam to the fixed target instrument, then the measuring support is moved left and right to align the laser beam with the front calibration hole, and then the levelness of the base is adjusted by the adjusting mechanism until the laser beam passes through the front calibration hole and the rear calibration hole and irradiates the fixed target instrument at the same time, and the measuring scale value corresponding to the reference scale is the current displacement measuring value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811385144.8A CN109458996B (en) | 2018-11-20 | 2018-11-20 | Movable target instrument convenient to use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811385144.8A CN109458996B (en) | 2018-11-20 | 2018-11-20 | Movable target instrument convenient to use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109458996A CN109458996A (en) | 2019-03-12 |
| CN109458996B true CN109458996B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811385144.8A Active CN109458996B (en) | 2018-11-20 | 2018-11-20 | Movable target instrument convenient to use |
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| CN (1) | CN109458996B (en) |
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| CN105758391A (en) * | 2016-04-12 | 2016-07-13 | 浙江工业职业技术学院 | Apparatus for determining 50cm wire used in building construction and using method thereof |
| TW201636576A (en) * | 2015-04-01 | 2016-10-16 | de-qin Zhang | Direct-reading type leveling compass |
| CN108680150A (en) * | 2018-07-19 | 2018-10-19 | 内蒙古工业大学 | A kind of hand-held construction account equipment fixation holder |
| CN209279974U (en) * | 2018-11-20 | 2019-08-20 | 国网浙江省电力有限公司紧水滩水力发电厂 | A kind of movable target instrument convenient to use |
-
2018
- 2018-11-20 CN CN201811385144.8A patent/CN109458996B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778225A (en) * | 2011-05-10 | 2012-11-14 | 中交第三航务工程勘察设计院有限公司 | Lift type deformation observing device |
| CN104390632A (en) * | 2014-11-21 | 2015-03-04 | 同济大学 | Total station collimation line method horizontal displacement observation platform and application method thereof |
| CN204514249U (en) * | 2015-02-10 | 2015-07-29 | 惠州雷曼光电科技有限公司 | A kind of angel measuring instrument |
| TW201636576A (en) * | 2015-04-01 | 2016-10-16 | de-qin Zhang | Direct-reading type leveling compass |
| CN105758391A (en) * | 2016-04-12 | 2016-07-13 | 浙江工业职业技术学院 | Apparatus for determining 50cm wire used in building construction and using method thereof |
| CN108680150A (en) * | 2018-07-19 | 2018-10-19 | 内蒙古工业大学 | A kind of hand-held construction account equipment fixation holder |
| CN209279974U (en) * | 2018-11-20 | 2019-08-20 | 国网浙江省电力有限公司紧水滩水力发电厂 | A kind of movable target instrument convenient to use |
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| Publication number | Publication date |
|---|---|
| CN109458996A (en) | 2019-03-12 |
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