CN205246041U - A three-direction seam measuring device with displacement sensors placed in parallel - Google Patents

Abstract

A three-way seam measuring device with displacement sensors arranged in parallel comprises a sensor fixing frame, three displacement sensors, a measuring seat and three contact surfaces. A first fixing plate is arranged on the side face of the sensor fixing frame, the three displacement sensors are fixed on the sensor fixing frame in parallel through hoops, and one ends of the three displacement sensors are connected with the first fixing plate; the side surface of the measuring seat is provided with a second fixing plate, the three contact surfaces are arranged on the measuring seat side by side, and one side, perpendicular to the three contact surfaces, of each contact surface is connected with the second fixing plate. The utility model discloses simple structure, measurement accuracy is high, and is with low costs, and adaptability is high, can be used to measure structure construction joint, movement joint, crack etc. is applicable to and measures the structure in the work progress or under the long-term user state, one-way, two-way and three-dimensional relative displacement of structure joint both sides.

Description

A three-direction seam measuring device with displacement sensors placed in parallel

technical field

The utility model relates to the field of engineering measurement, in particular to a three-way seam measuring device in which displacement sensors are placed in parallel.

Background technique

During the design and construction of reinforced concrete structures, deformation joints and construction joints will be provided on the structure, and cracks will inevitably occur during the use of the structure. The deformation characteristics of these gaps are not only an important characterization of the stress state of the reaction structure, but also an important indicator for evaluating the health state of the structure. Accurate monitoring of these structural gaps is of great significance for the design, construction and post-maintenance of the structure.

In the prior art, the patent document CN2107634U discloses a three-way seam gauge for measuring the displacement and deformation of cracks in geological rock mass. This utility model is connected with three mutually perpendicular displacement sensors on one side of the seam measurement. The other end is connected to the assembly barrel fixed on the other side of the measuring seam, thereby measuring the relative displacement on both sides of the measuring point; patent document CN2594763Y discloses a three-way seam measuring meter with three directions independent of each other, which is fixed on the toe plate The pedestal on the top is composed of displacement gauges in three directions, which are used to measure the three-way displacement of the dam joint; the patent document CN204085407U discloses a three-way joint measurement device that limits the degree of freedom of measurement, and consists of multi-section bent angle plates Composed with a micrometer, it limits the degree of freedom of measurement and ensures the uniqueness of the results. However, in the above technologies, measuring the displacement in the out-of-plane direction requires a displacement sensor in that direction, and this characteristic makes the volume of the three-way displacement sensor unable to be reduced. In the monitoring environment with high traffic requirements such as tunnels and bridges, the excessive thickness greatly reduces the applicability of the sensor.

Utility model content

The purpose of the utility model is to solve the deficiencies of the prior art and provide a three-way seam measuring device with displacement sensors placed in parallel, which has a simple structure and can be conveniently installed on the surface of tunnels and bridges that require high trafficability.

The purpose of this utility model is achieved by the following technical solutions:

A three-way seam measuring device in which displacement sensors are placed in parallel comprises a sensor fixing frame, three displacement sensors, a measuring seat, and three contact surfaces.

A first fixing plate is installed on the side of the sensor fixing frame, and the three displacement sensors are fixed on the sensor fixing frame in parallel through hoops, one end of the three displacement sensors is connected with the first fixing plate, and the other ends are connected to the first fixing plate. A measuring rod is installed, and a ball stud is installed on the measuring rod.

A second fixing plate is installed on the side of the measuring base, the three contact surfaces are arranged side by side on the measuring base, and the vertical side of the three contacting surfaces is connected with the second fixing plate.

The above-mentioned three-way seam measuring device with displacement sensors placed in parallel, wherein bolt holes are provided on the sensor fixing frame and the measuring base, and screws are installed on the sensor fixing frame and the measuring base through the bolt holes.

The above-mentioned three-direction seam measuring device with displacement sensors placed in parallel, wherein the displacement sensor is a displacement sensor of resistance type, vibrating wire type, differential type, capacitance grid type or laser type.

The above-mentioned three-way seam measuring device with displacement sensors placed in parallel, wherein the three contact surfaces and the plane of the measuring seat respectively form angles of 45°, 90° at the front and 45° at the side.

Due to the above-mentioned technical scheme, the utility model has the following advantages and positive effects:

The utility model has the advantages of simple structure, high measurement accuracy and low cost, and can be applied to displacement sensors of different types of principles, and can be used to measure construction joints, deformation joints, cracks, etc. One-way, two-way and three-way relative displacement on both sides of the slit; through one conversion, three displacement sensors can be placed in parallel for measurement, so that the volume of the device is greatly reduced, and the applicability to different use environments can be greatly improved.

Description of drawings

Fig. 1 is a structural schematic diagram of a three-way seam measuring device in which displacement sensors are placed in parallel according to the present invention;

Fig. 2 is a top view of a three-way seam measuring device in which displacement sensors are placed in parallel according to the utility model;

Fig. 3 is a side view of a three-way seam measuring device in which displacement sensors are placed in parallel according to the present invention;

Fig. 4 is an implementation effect diagram of a three-way seam measuring device in which displacement sensors are placed in parallel according to the present invention.

Reference signs:

1 sensor holder;

2 displacement sensors;

3 rods;

4 ball studs;

5 measuring seat;

6 contact surface;

7 screw;

8 hoops;

9 the first fixed plate;

10 second fixing plate.

detailed description

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.

Please refer to Fig. 1, Fig. 2 and Fig. 3. The utility model is a three-way seam measuring device with displacement sensors placed in parallel, including a sensor fixing frame 1, three displacement sensors 2, a measuring base 5, and three contact surfaces 6. Bolt holes are provided on the sensor fixing frame 1 and the measuring base 5, and a screw rod 7 is installed on the sensor fixing frame 1 and the measuring base 5 through the bolt holes.

The first fixing plate 9 is installed on the side of the sensor fixing frame 1, and the sensor fixing frame 1 is provided with three sets of hoops 8 for fixing the displacement sensor 2, and the three displacement sensors 2 are arranged on the sensor fixing frame 1 in parallel. One end of the displacement sensor 2 is connected with the first fixed plate 9, and the measuring rod 3 is installed on the other end.

A second fixing plate 10 is installed on the side of the measuring base 5 , and the three contact surfaces 6 are arranged side by side on the measuring base 5 , and the vertical sides of the three contacting surfaces 6 are connected with the second fixing plate 10 .

The displacement sensor 2 can be a displacement sensor of resistive type, vibrating wire type, differential type, capacitive type or laser type, and a ball stud 4 is installed on the top of the measuring rod 3, and the ball stud 4 rests on the center of the contact surface 6, and the displacement The measuring rod 3 of the sensor 2 always maintains a tendency to protrude outward during the monitoring process, so that the top of the side rod 3 is still in close contact with the contact surface 6 after the cyclic deformation of the measuring seam occurs.

The three contact surfaces 6 have different inclination angles respectively, and respectively form angles of 45°, 90°, and 45° with the plane of the measuring seat. The utility model adopts the following method to measure the three-way relative displacement of the structural seam:

Before the utility model is installed, at first take the deformation seam as the reference line on both sides of the structure, place the sensor fixing frame 1 and the measuring base 5 in parallel, and use a drill to drill bolt holes on both sides of the seam. Insert the measuring base 5 and the screw rod 7 of the measuring base 5 into the bolt hole, and then insert the sensor fixing frame 1 and the screw rod 7 on the sensor fixing frame 1 into the bolt hole for fine adjustment and fixing. Put the displacement sensor 2 into the hoop 8 and fix it, make the measuring rod 3 of the displacement sensor 2 protrude, and press against the three contact surfaces 6 respectively, and start detection.

Please refer to Figure 4, assume that the measured change of the displacement sensor on the front 45° inclined contact surface is a, the measured change of the displacement sensor on the vertical contact surface is b, and the measured change of the displacement sensor on the side 45° inclined contact surface The displacement sensor measures the variation as c; the actual deformation in three directions on both sides of the seam is x, y, z. Thus, the equations of the above variables and parameters can be obtained:

$<span\; class="notranslate">\; \{</span>\begin{array}{c}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; z</span>}\\ \mathrm{<span\; class="notranslate">\; b</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}\\ \mathrm{<span\; class="notranslate">\; c</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; the\; y</span>}\end{array}<span\; class="notranslate">\; ,</span>$

By solving the equations, the three-direction relative displacement expression on both sides of the seam can be obtained:

$<span\; class="notranslate">\; \{</span>\begin{array}{c}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; c</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; b</span>}\\ \mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; b</span>}\\ \mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; b</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; a</span>}\end{array}<span\; class="notranslate">\; .</span>$

Due to the above-mentioned technical scheme, the utility model has the following advantages and positive effects:

The utility model has the advantages of simple structure, high measurement accuracy and low cost, and can be applied to displacement sensors of different types of principles, and can be used to measure construction joints, deformation joints, cracks, etc. One-way, two-way and three-way relative displacement on both sides of the slit; through one conversion, three displacement sensors can be placed in parallel for measurement, so that the volume of the device is greatly reduced, and the applicability to different use environments can be greatly improved.

The above-described embodiments are only used to illustrate the technical ideas and characteristics of this patent, and its purpose is to enable those skilled in the art to understand the content of this patent and implement it accordingly, and the scope of this patent cannot be limited only by this embodiment. The patent scope, that is, all equivalent changes or modifications made according to the spirit disclosed in this patent still fall within the patent scope of this patent.

Claims (4)

1. A three-way seam measuring device in which displacement sensors are placed in parallel, is characterized in that it comprises a sensor holder (1), three displacement sensors (2), a measuring base (5), and three contact surfaces (6); A first fixing plate (9) is installed on the side of the sensor fixing frame (1), and the three displacement sensors (2) are fixed on the sensor fixing frame (1) in parallel through hoops (8), and the three displacement sensors (2) are parallel fixed on the sensor fixing frame (1). One end of each displacement sensor (2) is connected with the first fixed plate (9), and the other end is equipped with a measuring rod (3), and a ball stud (4) is installed on the measuring rod (3); A second fixed plate (10) is installed on the side of the measuring seat (5), the three contact surfaces (6) are arranged side by side on the measuring seat (5), and the three contact surfaces (6) are vertical One side is connected with the second fixing plate (10). 2. A three-way seam measuring device in which displacement sensors are placed in parallel according to claim 1, characterized in that bolt holes are provided on the sensor fixing frame (1) and the measuring base (5), and are passed through the bolt holes Install the screw rod (7) on the sensor holder (1) and measuring base (5) through the hole. 3. A three-way seam measuring device with displacement sensors placed in parallel according to claim 1, characterized in that the displacement sensor (2) adopts resistive, vibrating wire, differential, capacitive grid or laser type of displacement sensor. 4. A three-way seam measuring device with displacement sensors placed in parallel according to claim 1, characterized in that, the three contact surfaces (6) and the plane of the measuring seat are respectively 45° and 90° on the front and 45° on the side. ° included angle.