阅读说明：本技术 一种工程监理用装置 (Device for engineering supervision ) 是由 刘晨曦 陈文佳 杨怀春 黄国兴 李杨松 胡四喜 严晗笑 田缝涛 于 2019-07-26 设计创作，主要内容包括：本发明涉及一种工程监理用装置,包括底端相互球铰接的主杆和副杆,主杆和副杆上分别滑动连接有主滑块和副滑块,主杆和副杆分别对主滑块和副滑块进行自转限位,主滑块和副滑块均铰接有连接板,两组连接板设置在两组滑块相互远离的侧面；主滑块沿主杆的轴线转动连接有卷尺,副滑块沿副杆的轴线转动连接有与卷尺的伸出端固定的连接部；主杆和副杆之间设置有检测两者在待测平面投影的夹角的测量部。通过上述设置,主滑块和副滑块之间连接的卷尺进行缝隙宽度的测量,并记录为初始数据,将后续持续记录的卷尺的读数与该初始数据进行比对,形成对裂缝宽度变化的分析数据。可以根据主杆和副杆之间的位置变化较为直观地看出裂缝的变化趋势。(The invention relates to a device for project supervision, which comprises a main rod and an auxiliary rod, wherein the bottom ends of the main rod and the auxiliary rod are mutually and spherically hinged, a main sliding block and an auxiliary sliding block are respectively connected onto the main rod and the auxiliary rod in a sliding manner, the main rod and the auxiliary rod respectively limit the rotation of the main sliding block and the auxiliary sliding block, the main sliding block and the auxiliary sliding block are both hinged with connecting plates, and two groups of connecting plates are arranged on the side surfaces, far away from each other, of the; the main sliding block is rotatably connected with a tape along the axis of the main rod, and the auxiliary sliding block is rotatably connected with a connecting part fixed with the extending end of the tape along the axis of the auxiliary rod; a measuring part for detecting the included angle of the main rod and the auxiliary rod projected on the plane to be measured is arranged between the main rod and the auxiliary rod. Through the arrangement, the measuring tape connected between the main sliding block and the auxiliary sliding block measures the width of the gap and records the width as initial data, and the reading of the measuring tape continuously recorded subsequently is compared with the initial data to form analysis data of the change of the width of the gap. The change trend of the crack can be visually seen according to the position change between the main rod and the auxiliary rod.)

1. A device for engineering supervision is characterized in that: the device comprises a main rod (1) and an auxiliary rod (2) with the bottom ends thereof being in spherical hinge joint with each other, wherein a main slider (11) and an auxiliary slider (21) are respectively connected to the main rod (1) and the auxiliary rod (2) in a sliding manner, the main slider (11) and the auxiliary slider (21) are respectively limited by rotation of the main rod (1) and the auxiliary rod (2), the main slider (11) and the auxiliary slider (21) are both hinged with connecting plates (3), and the two groups of connecting plates (3) are arranged on the side faces, away from each other, of the two groups of sliders; the main sliding block (11) is rotatably connected with a measuring tape (12) along the axis of the main rod (1), and the auxiliary sliding block (21) is rotatably connected with a connecting part fixed with the extending end of the measuring tape (12) along the axis of the auxiliary rod (2); and a measuring part for detecting an included angle projected by the main rod (1) and the auxiliary rod (2) on a plane to be measured is arranged between the main rod and the auxiliary rod.

2. The project supervision device according to claim 1, wherein: mobile jib (1) bottom fixedly connected with owner semicircle ring (13), owner semicircle ring (13) place plane with mobile jib (1) is perpendicular, vice pole (2) bottom fixedly connected with vice semicircle ring (22), the plane at vice semicircle ring (22) place with vice pole (2) coplane, main semicircle ring (13) with be provided with cross (4) between vice semicircle ring (22), two sets of just right links of cross (4) are articulated with main semicircle ring (13) and vice semicircle ring (22) respectively.

3. The project supervision device according to claim 2, wherein: the measuring part comprises a protractor (41) fixed with the cross shaft (4), the plane where the protractor (41) is located is coplanar with the plane where the main semicircular ring (13) is located, the auxiliary semicircular ring (22) is fixedly connected with a pointer (221) pointing to the center of the cross shaft (4), and the pointer (221) slides on a dial of the protractor (41).

4. The project supervision device according to claim 1, wherein: the cross section of mobile jib (1) and vice pole (2) is the rectangle, main slider (11) and vice slider (21) respectively with mobile jib (1) and vice pole (2) cup joint the slip.

5. The project supervision device according to claim 4, wherein: the outer peripheral surfaces of the main sliding block (11) and the auxiliary sliding block (21) are respectively fixed with a fixed ring (5), the periphery of the fixed ring (5) is wrapped with a movable ring (51), two ends of the movable ring (51) protrude towards the circular direction to form a limiting ring (52) wrapping the fixed ring (5), the movable ring (51) is rotatably connected with the fixed ring (5), and the tape measure (12) is fixedly connected with the movable ring (51) on the main sliding block (11).

6. The project supervision device according to claim 4, wherein: the extending end of the measuring tape (12) is fixedly connected with a connecting ring (122), and the movable ring (51) on the auxiliary sliding block (21) is fixedly connected with a connecting hook (53) connected with the connecting ring (122).

7. The project supervision device according to claim 2, wherein: cross axle (4) with slot has been seted up to vice semicircle ring (22) articulated link, it has locating pin (6) to peg graft in the slot, the cross section of locating pin (6) is type "T" style of calligraphy, locating pin (6) outer peripheral face stretches out and has branch (61), branch (61) are kept away from the terminal fixedly connected with of locating pin (6) with inserted bar (62) that locating pin (6) are parallel, confession has been seted up in vice semicircle ring (22) the jack that inserted bar (62) were pegged graft, locating pin (6), inserted bar (62) simultaneously with during slot, jack are pegged graft, shown mobile jib (1) with vice pole (2) coplane.

8. The project supervision device according to claim 7, wherein: the positioning pin (6) is connected with a connecting rope (63).

9. The project supervision device according to claim 1, wherein: and scale marks are arranged on the outer peripheral surfaces of the main rod (1) and the auxiliary rod (2).

10. The project supervision device according to claim 1, wherein: one side of the auxiliary sliding block (21) far away from the main rod (1) is rotatably connected with a connecting block (23), the rotating axis of the connecting block (23) is perpendicular to the axis of the auxiliary rod (2), and the connecting plate (3) is hinged to the connecting block (23).

Technical Field

The invention relates to the technical field of detection equipment, in particular to a device for engineering supervision.

Background

After an earthquake, obvious cracks are easily generated on the road surface or the wall surface of a house, the cracks are continuously generated, the ground or the wall surfaces on two sides of the cracks are possibly settled, inclined or staggered, and then the cracks of the cracks are enlarged, so that potential safety hazards exist, the cracks need to be monitored for improving safety protection, whether the road or the house can be continuously used or not is evaluated, the crustal movement of the area is monitored, and the like.

At present, the most traditional crack monitoring method is to measure the width of a crack on a road surface or a house in real time by using a vernier caliper, and then record the measured data to obtain the cracking degree of the crack; however, it is not intuitive enough to monitor the crack only by caliper measurement data, it is difficult to accurately display the cracking condition of the crack, and there is a certain limitation: on one hand, each measurement cannot accurately measure the same crack, and a large error exists; on the other hand, whether the ground on two sides of the crack is settled or misplaced cannot be measured. And because the monitoring needs to be carried out for a long time, the measurement times are more, and the inconvenience is usually brought by frequently carrying the tool. Therefore, there is room for improvement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a device for engineering supervision, which has the advantages of visual observation and comparison, fixed monitoring position and more accurate measurement data.

In order to achieve the purpose, the invention provides the following technical scheme:

a device for project supervision comprises a main rod and an auxiliary rod, wherein the bottom ends of the main rod and the auxiliary rod are mutually and spherically hinged, a main sliding block and an auxiliary sliding block are respectively connected onto the main rod and the auxiliary rod in a sliding mode, the main rod and the auxiliary rod respectively limit the main sliding block and the auxiliary sliding block in an autorotation mode, the main sliding block and the auxiliary sliding block are respectively hinged with connecting plates, and two groups of the connecting plates are arranged on the side faces, far away from each other, of the two groups of the sliding; the main sliding block is rotatably connected with a tape along the axis of the main rod, and the auxiliary sliding block is rotatably connected with a connecting part fixed with the extending end of the tape along the axis of the auxiliary rod; and a measuring part for detecting the included angle of the main rod and the auxiliary rod projected on the plane to be measured is arranged between the main rod and the auxiliary rod.

Through the setting, the bottom of mobile jib and vice pole is passed through the ball and is articulated to form two degree of freedom pivoted structures to sliding connection has main slider and vice slider respectively on mobile jib and vice pole, and main slider and vice slider only do not take place the rotation along linear motion, and the side that main slider and vice slider kept away from each other all articulates through the hinge has the connecting plate. When using this device for engineering supervision to last the detection to the crack, insert the gap with the link of mobile jib and vice pole earlier to adjust two sets of connecting plates to the state parallel with the ground or the wall isoplanar of gap both sides, then pass through the fix with screw with the plane of gap both sides respectively with the connecting plate. Therefore, the width of the gap is measured through the tape measure connected between the main sliding block and the auxiliary sliding block, the tape measure is recorded as initial data, and the reading of the tape measure continuously recorded subsequently is compared with the initial data to form analysis data of the change of the width of the gap. Wherein the movement of the planes on both sides of the crack presents uncertainty due to the overall strength reduction of the ground or wall after the crack occurs, and there are settlement, inclination or dislocation situations in addition to the continuous crack. Through being provided with measuring part between mobile jib and vice pole, measuring part detects mobile jib and vice pole at the projected contained angle in the plane of the gap place wall that awaits measuring or ground, can obtain the change A of contained angle through the contrast before and after measuring to can combine tape measure reading B, calculate the planar displacement volume in crack both sides through the trigonometric function and be C = B sin (A), thereby can judge according to the displacement between mobile jib and the vice pole that the dislocation has taken place and calculate the displacement volume of dislocation. And when the two sides of the gap are relatively settled, the main sliding block or the auxiliary sliding block is made to slide, the tape measure is made to incline, and the relative displacement of the two sides of the gap in the vertical direction can be obtained according to the mode of solving the triangle by combining the reading of the tape measure and the displacement of the main sliding block or the auxiliary sliding block. Thereby compare current crack monitoring mode, the control position of mobile jib and vice pole is fixed, can comparatively find out cracked trend of change directly perceivedly according to the position change between mobile jib and the vice pole to can calculate cracked specific width change or perpendicular relative displacement change according to measured data, measured data is comparatively accurate.

The invention further provides a main semicircular ring fixedly connected to the bottom of the main rod, wherein the plane of the main semicircular ring is perpendicular to the main rod, an auxiliary semicircular ring is fixedly connected to the bottom of the auxiliary rod, the plane of the auxiliary semicircular ring is coplanar with the auxiliary rod, a cross shaft is arranged between the main semicircular ring and the auxiliary semicircular ring, and two groups of opposite connecting ends of the cross shaft are respectively hinged with the main semicircular ring and the auxiliary semicircular ring.

Through the setting, main semicircle ring place plane sets up with vice semicircle ring place plane is perpendicular, through set up the cross axle between main semicircle ring fixed in mobile jib bottom and the vice semicircle ring of vice pole bottom fixation to two sets of just right links of cross axle are articulated with main semicircle ring and vice semicircle ring respectively, form ball hinge structure, make the mobile jib relatively carry out the rotation of two degrees of freedom, adapt to the planar multiple structural change in gap both sides, improved the device to fissured detection effect.

The invention further provides that the measuring part comprises a protractor fixed with the cross shaft, the plane of the protractor is coplanar with the plane of the main semicircular ring, the auxiliary semicircular ring is fixedly connected with a pointer pointing to the center of the cross shaft, and the pointer slides on a dial of the protractor.

Through the setting, mark the angle scale on the protractor fixed with the cross axle, and the plane coplane setting at protractor place plane and main semicircle ring place, vice semicircle ring center protrusion is fixed with the pointer at directional cross axle center, the pointer is followed vice semicircle ring motion, when the contained angle between them changes in the projection of mobile jib and auxiliary rod on the gap place plane that awaits measuring, the pointer is slick and sly slided on the calibrated scale of protractor, thereby can read mobile jib and auxiliary rod contained angle variation between them in the projection on the gap place plane that awaits measuring. The displacement amount of dislocation between planes on two sides of the gap can be obtained through the included angle variation.

The invention is further provided that the cross sections of the main rod and the auxiliary rod are rectangular, and the main sliding block and the auxiliary sliding block are respectively sleeved with the main rod and the auxiliary rod to slide.

Through the setting, all set up the cross section of mobile jib and vice pole into the rectangle, make main slider and vice slider middle part link up have with mobile jib and vice pole complex through-hole to when main slider and vice slider slide respectively on mobile jib and vice pole, main jib and vice pole carry out circumference spacing to main slider and vice slider, make main slider and vice slider can only follow linear motion, unable rotation. Thereby after the connecting plate is fixed with ground, main slider and vice slider rotate mobile jib and vice pole spacing, make the relative rotation between mobile jib and the vice pole only can realize through the ball joint of bottom to the measuring error volume has been reduced.

The invention is further provided with a fixed ring fixed on the outer peripheral surfaces of the main sliding block and the auxiliary sliding block, a movable ring wrapped on the outer peripheral surface of the fixed ring, limiting rings wrapped on the fixed ring and protruding towards the circular direction from two ends of the movable ring, the movable ring is rotatably connected with the fixed ring, and the tape measure is fixedly connected with the movable ring on the main sliding block.

Through the setting, move the ring and decide the ring and carry out spacing messenger's ring through the spacing ring and do not break away from with deciding the ring, and make the ring encircle and decide the ring rotation, through being fixed in the ring that moves on the main sliding block with the tape measure, realize when taking place relative dislocation between mobile jib and the auxiliary rod, the tape measure is under the elastic force effect of self rolling, the ring rotation that moves on the drive mobile jib, the cooperation stretches out the end with the tape measure and is connected with the auxiliary rod rotation connecting portion, the chi strip that makes the tape measure remains straight throughout, thereby convenient to use person's reading.

The invention further provides that the extending end of the measuring tape is fixedly connected with a connecting ring, and the movable ring on the auxiliary sliding block is fixedly connected with a connecting hook connected with the connecting ring.

Through the arrangement, the extending end of the tape measure is connected with the auxiliary sliding block by the user through the connection mode of the connecting ring and the connecting hook, the connection between the extending end of the tape measure and the auxiliary sliding block is also conveniently released, and the use comfort is improved.

The invention further provides that a slot is formed in the connecting end, hinged to the auxiliary semi-circular ring, of the cross shaft, a positioning pin is inserted in the slot, the cross section of the positioning pin is in a T-like shape, a support rod extends out of the outer peripheral surface of the positioning pin, the tail end, far away from the positioning pin, of the support rod is fixedly connected with an insertion rod parallel to the positioning pin, a jack for the insertion rod to be inserted is formed in the auxiliary semi-circular ring, and when the positioning pin and the insertion rod are simultaneously inserted into the slot and the jack, the main rod and the auxiliary rod are coplanar.

Through the arrangement, the cross section of the positioning pin is similar to a T shape, and the positioning pin is matched with the slot of the cross shaft in an inserting mode, so that the positioning pin is limited in rotation through the slot, and the positioning pin cannot rotate. When the fork rod fixed with the positioning pin is plugged with the jack of the auxiliary semicircular ring, the fork rod rotates and limits the auxiliary semicircular ring, the auxiliary rod and the main rod are arranged to be coplanar, and the pointer is located in the middle of the protractor. Therefore, a user can conveniently plug the main rod and the auxiliary rod in the state into the gap, and fix the connecting plate with the planes on two sides of the gap, so that after the auxiliary rod is unlocked and limited in rotation, when the auxiliary rod is displaced relative to the main rod in a staggered manner, the movement range of the pointer on the protractor is larger.

The invention further provides that the positioning pin is connected with a connecting rope.

Through the setting, connect the rope at locating pin fixedly connected with to after convenient to use person installs the device in the gap, the user can be through carrying the pulling connection rope with bolt and slot separation, the operation of being convenient for also improves user's security, need not extract the bolt in stretching into the gap with the hand.

The invention is further provided with scale marks on the peripheral surfaces of the main rod and the auxiliary rod.

Through the arrangement, the scale marks arranged on the outer peripheral surfaces of the main rod and the auxiliary rod can facilitate a user to calculate the relative displacement of the main sliding block or the auxiliary sliding block, so that the later-stage calculation is facilitated.

The invention is further provided that one side of the auxiliary sliding block, which is far away from the main rod, is rotatably connected with a connecting block, the rotating axis of the connecting block is vertical to the axis of the auxiliary rod, and the connecting plate is hinged with the connecting block.

Through the arrangement, the connecting plate on the auxiliary sliding block rotates with two degrees of freedom relative to the auxiliary sliding block, so that when the planes on the two sides of the gap are staggered, the connecting plate on the auxiliary sliding block can rotate relative to the auxiliary sliding block, the displacement range of the dislocation between the auxiliary rod and the main rod is improved, and the damage to the hinge structure between the connecting plate and the auxiliary sliding block is reduced.

In conclusion, the invention has the following beneficial effects:

1. the bottom of the main rod and the bottom of the auxiliary rod can rotate in two degrees of freedom, and the tape measure between the main rod and the auxiliary rod can slide and rotate around an axis under the action of the main slider and the auxiliary slider, so that the capability of the device for adapting to the relative position change of planes on two sides of a gap is improved, the monitoring can be kept and the data of the change of the gap can be reasonably calculated when the planes on two sides of the gap are separated, settled, inclined or staggered, and meanwhile, the change condition of the gap can be visually observed through the difference between the position relation between the main rod and the auxiliary rod and the position relation when the tape measure is just placed;

2. the positioning pin for rotatably limiting the auxiliary semicircular ring is inserted and connected to the cross shaft, so that the main rod and the auxiliary rod can be kept coplanar when the device is installed in a gap on a wall surface or the ground, the device and planes on two sides of the gap can be conveniently and fixedly installed, and the monitoring range of the auxiliary rod relative to the movement of the main rod is also improved;

3. the relative displacement between the two connecting plates can be calculated through the reading of the tape measure, the reading of the protractor and the sliding displacement of the main sliding block and the auxiliary sliding block, the variation of the vertical height is included, the detection parameters for monitoring the gap are increased, and a user can conveniently evaluate whether a road or a house with the gap can be continuously used or not, and monitor the crustal movement and the like of the area.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is an exploded view of the structure of the present embodiment;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is a schematic structural diagram illustrating a usage status in the present embodiment;

fig. 6 is a schematic structural diagram of the device when the planes on the two sides of the gap are dislocated in the embodiment.

Reference numerals: 1. a main rod; 11. a main slider; 12. a tape measure; 121. a ruler strip; 122. a connecting ring; 13. a main semi-circular ring; 2. an auxiliary rod; 21. a sub slider; 22. an auxiliary semicircular ring; 221. a pointer; 23. connecting blocks; 3. a connecting plate; 4. a cross shaft; 41. a protractor; 5. a circular ring is determined; 51. a movable circular ring; 52. a limiting ring; 53. a connecting hook; 6. positioning pins; 61. a strut; 62. inserting a rod; 63. and connecting ropes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 2, the project supervision device disclosed by the invention comprises a main rod 1 and an auxiliary rod 2 with rectangular cross sections, wherein the bottom ends of the main rod 1 and the auxiliary rod 2 are mutually hinged in a ball joint mode. The ball hinged structure comprises a main semicircular ring 13 fixed with the main rod 1, an auxiliary semicircular ring 22 fixed with the auxiliary rod 2 and a cross shaft 4 arranged between the main semicircular ring 13 and the auxiliary semicircular ring 22, wherein the plane where the main semicircular ring 13 is located is perpendicular to the axis of the main rod 1, the plane where the auxiliary semicircular ring 22 is located is coplanar with the auxiliary rod 2, and two sets of opposite connecting ends of the cross shaft 4 are hinged with the main semicircular ring 13 and the auxiliary semicircular ring 22 respectively. So that the secondary lever 2 can rotate in two degrees of freedom within a certain range with respect to the primary lever 1.

Respectively sliding connection has main slider 11 and vice slider 21 on mobile jib 1 and the vice pole 2, and main slider 11 and vice slider 21 set up respectively with the mobile jib 1 and the cooperation through-hole that cup joints of vice pole 2 to it is spacing to rotate main slider 11 and vice slider 21 respectively through mobile jib 1 and vice pole 2, makes main slider 11 and vice slider 21 respectively can only follow the axis slip of mobile jib 1 and vice pole 2. Wherein the outer peripheral face of mobile jib 1 and auxiliary rod 2 all is provided with the scale mark, and the scale mark extends along the length direction of mobile jib 1 and auxiliary rod 2.

As shown in fig. 2 to 3, wherein a connecting block 23 is rotatably connected to a side of the sub-lever 2 away from the main lever 1, a rotation axis of the connecting block 23 is aligned with an axis of the sub-lever 2. The side that main slider 11 and vice slider 21 kept away from each other all hinges through the hinge has connecting plate 3, and wherein the axis of rotation of the connecting plate 3 of main slider 11 is perpendicular with the axis of mobile jib 1, and connecting plate 3 and the connecting block 23 of vice slider 21 are articulated.

Wherein the outer peripheral face of main slider 11 and vice slider 21 all cup joints and is fixed with decides ring 5, it has movable ring 51 to decide 5 outer peripheral parcels of ring, the both ends of moving ring 51 axis direction all bulge has the spacing ring 52 of parcel fixed ring 5, the bore of spacing ring 52 is less than the bore of deciding ring 5, thereby the effect through spacing ring 52 makes movable ring 51 not break away from with fixed ring 5, and move ring 51 and decide ring 5 and rotate and be connected, the arc surface that moves ring 51 and decide ring 5 and directly laminate has reduced sliding friction between the two, be convenient for move ring 51 around deciding ring 5 and rotate.

The measuring tape 12 is fixedly connected to the outer peripheral surface of the movable ring 51 of the main rod 1, that is, the measuring tape 12 is rotatably connected around the axis of the main rod 1, wherein the extending end of the measuring tape 121 of the measuring tape 12 is fixedly connected with a connecting ring 122, the movable ring 51 on the auxiliary slider 21 is fixedly connected with a connecting hook 53 for the connecting ring 122 to hook, and the opening of the connecting hook 53 faces the direction away from the auxiliary semicircular ring 22. The ruler strip 121 is provided with scale marks along the length direction thereof, so that the linear distance between the main slider 11 and the auxiliary slider 21 can be obtained according to the extension length of the ruler strip 121.

As shown in fig. 2 and 4, a measuring portion for detecting an included angle projected by the primary lever 1 and the secondary lever 2 on a plane to be measured is arranged between the primary lever 1 and the secondary lever 2, the measuring portion includes a semicircular protractor 41 fixed to the cross shaft 4, and a plane of the protractor 41 is coplanar with a plane of the primary semicircular ring 13, that is, perpendicular to a plane of the secondary semicircular ring 22. The pointer 221 pointing to the center of the cross shaft 4 is fixedly connected to the inner side of the arc of the auxiliary semicircular ring 22, the pointer 221 makes an arc motion along with the auxiliary semicircular ring 22, and the pointer 221 slides above the dial of the protractor 41. The dial on the protractor 41 is set such that when the pointer 221 is in the middle of the protractor 41, that is, the auxiliary rod 2 and the main rod 1 are coplanar, the reading of the protractor 41 is 0 °, the scales of the protractor 41 gradually increase from the middle to the scales at the two ends, and the scale lines are arranged in an arc.

The cross shaft 4 is provided with a slot at a connecting section hinged with the auxiliary semicircular ring 22, a positioning pin 6 with a cross section similar to a T shape is inserted in the slot, and the slot is matched with the positioning pin 6 in shape, so that the positioning pin 6 is rotated and limited through the slot, and the positioning pin 6 cannot rotate along the axis of the positioning pin 6. Wherein the outer peripheral face of locating pin 6 stretches out to be fixed with branch 61, and the one end fixedly connected with that locating pin 6 was kept away from to branch 61 has the inserted bar 62 with locating pin 6 parallel arrangement, and wherein vice semicircle ring 22 link up and sets up the jack that supplies inserted bar 62 to peg graft, and when mobile jib 1 and vice pole 2 were coplanar, inserted bar 62 was pegged graft with the slot when locating pin 6 was pegged graft with the slot to it is spacing to rotate vice semicircle ring 22 through locating pin 6 and the spacing mode of slot grafting. And then realize spacing to the rotation between vice pole 2 and the mobile jib 1, make vice pole 2 and mobile jib 1 can only do the motion that the contained angle opened and shut in same plane to convenient to use person packs into the gap with the interconnect's of mobile jib 1 and vice pole 2 one end.

Wherein the one end that locating pin 6 kept away from the slot is fixed with and connects rope 63, and the person of being convenient for installs the device into the gap after through connecting rope 63 with locating pin 6 with the slot unblock.

The implementation principle of the embodiment is as follows:

as shown in fig. 5 to 6, when the device for engineering supervision is used to monitor a gap, the auxiliary rod 2 is rotated to be coplanar with the main rod 1, and the rotation limit between the auxiliary rod 2 and the main rod 1 is realized by the positioning pin 6 and the inserting rod 62 respectively with the slot and the inserting hole, so that the auxiliary rod 2 can only make an opening and closing movement with a variable included angle with the main rod 1 in the same plane. Then, one end of the main rod 1, which is in spherical hinge with the auxiliary rod 2, is inserted into the gap, the main sliding block 11 and the auxiliary sliding block 21 are slid to appropriate positions on two sides of the gap, and the connecting plates 3 on the main sliding block 11 and the auxiliary sliding block 21 are respectively fixedly connected with the planes on two sides of the gap through screws. Finally, the positioning pin 6 is pulled away through the connecting rope 63, so that the auxiliary rod 2 and the main rod 1 can rotate in two degrees of freedom, and displacement parameters of various conditions such as crack, settlement, inclination or dislocation of a gap can be measured and calculated by the engineering supervision device in cooperation with relative sliding of the main slider 11 and the auxiliary slider 21.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.