CN103528494B - A kind of current vortex time deformation measuring device - Google Patents

Abstract

The invention discloses an eddy current creep deformation measurement device, which includes an eddy current displacement sensor device and a bracket; the eddy current sensing device includes a data acquisition display, a sensor extension cable, a sensor probe, and a sensor probe fixing screw; the bracket includes a sensor probe bracket and the target plate bracket, two longitudinal and transverse reinforcing plates are set in each bracket, and two bolt holes for fixing the bracket are opened, and the sensor probe mounting hole is also provided on the top of the sensor bracket plate; the sensor probe bracket and the target The target plate support is provided with sensor support fixing bolts and target support fixing bolts, and each bolt is provided with a bolt washer. The test data of the invention is accurate, efficient and convenient, and the installation is convenient and quick.

Description

An eddy current creep deformation measuring device

technical field

The invention relates to the field of electronic inductance and building materials, in particular to an eddy current creep deformation measuring device.

Background technique

The eddy current displacement sensor is widely used in electric power, electronics, petroleum, chemical industry, metallurgy, construction, building materials and other industries due to its good reliability, wide measurement range, high measurement sensitivity and high measurement accuracy. The monitoring of the displacement of large rotating machinery bearings and the shrinkage of concrete building materials plays an important role.

Concrete is one of the main building materials of buildings, and its performance is closely related to the life and safety of buildings. As one of the important indicators for the long-term and durability evaluation of concrete materials, compression creep has a significant impact on the design of buildings and the evaluation of safe use; the accuracy of its test methods will seriously affect the quality of buildings. The safety of use; the convenience of its testing means will also affect the design and construction process of buildings.

Existing technology, the deformation measurement device used in conjunction with the spring compression creep meter in the test method GB/T 50082-2009 "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete", usually uses a differential strain gauge or a steel string strain gauge The built-in deformation measurement devices such as gauges, or the external strain measurement devices bonded with brackets or the attached contact extensometer measurement devices, etc., their disadvantages are: the use of embedded test devices is expensive, and the service life of the strain gauge is relatively long. Short; while the externally mounted bonded or attached deformation measuring device has poor positioning accuracy and poor firmness after positioning.

In view of the many defects of the concrete creep deformation measurement device in the prior art, the inventor developed a concrete creep deformation measurement device that overcomes the above defects, and this case arose from it.

Contents of the invention

The object of the present invention is to provide a creep deformation measurement device with accurate, efficient and convenient test data, convenient, fast and firm installation.

To achieve the above object, the present invention is achieved through the following technical solutions:

An eddy current creep deformation measuring device, the measuring device includes an eddy current sensing device and a bracket connected with the eddy current sensing device to realize terminal detection, wherein:

An eddy current sensing device, which includes a sequentially connected data acquisition display and a plurality of extended sensing probes, each of which is connected to the data acquisition display to perform a creep deformation test on the terminal of the object under test, said Each extended sensing probe head includes a sensor extension cable and a sensor probe forming a sensing detection channel;

The bracket includes a plurality of sensor probe bracket groups and target plate bracket groups arranged on both sides of the object to be measured, and each sensor probe bracket group includes two sensor probe brackets symmetrically arranged on both sides of the object to be measured, each The sensor probes are all locked to the outside of the sensor probe bracket by the sensor probe fixing screws to form an eddy current terminal detection structure, and each target plate bracket group includes two target plate brackets symmetrically arranged on both sides of the object to be measured.

Further, each of the sensor probe brackets and the target plate bracket is an L-shaped support plate, and each sensor probe bracket includes a sensor bracket bottom plate parallel to the side of the object to be measured and a sensor bracket plate perpendicular to the sensor bracket bottom plate; each Each target plate support includes a target plate support bottom plate parallel to the side of the object to be measured and a target plate vertically arranged on the target plate support bottom plate.

Further, the plane of the target plate is perpendicular to the axis of each sensor probe.

Further, the bottom plate of the sensor bracket is provided with two sensor bracket longitudinal and transverse reinforcement plates and two sensor bracket bolt holes for fixing brackets are provided, and the sensor bracket plate is provided with sensor probe installation holes; The matching sensor bracket fixing bolts cooperate to realize locking and fixing, and the sensor bracket fixing bolts are provided with sensor bracket bolt washers;

Preferably: the two sensor bracket bolt holes are symmetrically distributed on both sides of the center line of the bracket, and the sensor probe mounting holes are located on the center line of the sensor bracket plate.

Further, the two sensor bracket longitudinal reinforcing plates are arranged in parallel and fixed on the outer surface of the sensor bracket bottom plate, and the two sensor bracket transverse reinforcing plates are respectively fixed on the outer sides of the two sensor bracket longitudinal reinforcing plates to form a sensor probe bracket Strengthen the structure.

Further, the bottom plate of the target bracket is provided with two target bracket longitudinal and transverse reinforcement plates and two target bracket bolt holes for fixing the bracket are set, and each target bracket is fixed by a matching target bracket bolt. Cooperate to realize locking and fixing, and the target bracket fixing bolt is provided with a target bracket bolt washer;

Preferably: the two target bracket bolt holes are symmetrically distributed on both sides of the centerline of the target plate bracket.

Further, the two longitudinal reinforcing plates of the target bracket are arranged in parallel and fixed on the outer surface of the bottom plate of the target bracket, and the two transverse reinforcing plates of the target bracket are respectively fixed on the outer sides of the two longitudinal reinforcing plates of the target bracket, Form the target plate bracket reinforcement structure.

Further, the number of the extended sensor probes is 2-6, and then the number of sensor probes is 2-6, and the number of test pieces that can be tested at the same time is 1-3.

Further, the target plate is made of weakly magnetically permeable materials such as aluminum, aluminum alloy, etc. The surface of the target plate facing the probe is smooth, the height of the target plate should be higher than the sensor support plate, and the target plate and the sensor support plate are respectively perpendicular to the target Target support bottom plate, sensor support bottom plate.

After adopting the above scheme, compared with the prior art, it has the following advantages:

1. After the device is anchored by embedded bolts, the accuracy and reliability of measurement and positioning can be better guaranteed;

2. The device can measure 1-3 creep deformation specimens at the same time, and the testing method is flexible and efficient;

3. The device adopts eddy current sensing device for detection, automatic data collection, high test accuracy and convenient test process.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is a side view of the present invention;

Label description:

Data acquisition display 11 Sensor extension cable 12

Sensor probe 13 Sensor probe fixing screw 14

Sensor probe holder 21

Sensor bracket plate 211 Sensor bracket longitudinal reinforcement plate 212

Transverse reinforcement plate for sensor bracket 213 Bolt hole for sensor bracket 214

Sensor probe mounting hole 215 Sensor bracket bottom plate 216

Target plate bracket 22

Target plate 221 Target bracket longitudinal reinforcement plate 222

Target bracket transverse reinforcement plate 223 Target bracket bolt hole 224

Target bracket bottom plate 225

Sensor bracket fixing bolt 31 Sensor bracket bolt washer 311

Target bracket fixing bolt 32 Target bracket bolt washer 321

Formed concrete specimen to be tested 4.

detailed description

The present invention will be further described below in conjunction with accompanying drawing:

Embodiment: Please refer to Fig. 1 and Fig. 2, a kind of eddy current creep deformation measuring device, the measuring device includes an eddy current sensing device and a bracket connected with the eddy current sensing device to realize terminal detection

Please refer to Fig. 1 and shown in Fig. 2, the eddy current sensing device, it comprises the data acquisition display 11 and a plurality of extension type sensing probes connected in sequence, each extension type sensing detection head is all connected with the data acquisition display 11 Realize the creep deformation test of the 4 terminals of the formed concrete specimen to be detected, each of the extended sensing probes includes a sensor extension cable 12 and a sensor probe 13 forming a sensing detection channel, and the data acquisition display 11 is equipped with data acquisition display system.

Please refer to Fig. 1 and shown in Fig. 2, support, it comprises a plurality of sensor probe support groups and the target plate support group that are arranged on the both sides of forming concrete specimen 4 to be detected, and each sensor probe support group comprises two symmetrical The sensor probe brackets 21 arranged on both sides of the shaped concrete specimen 4 to be detected, each of the sensor probes 13 is locked to the outside of the sensor probe bracket 21 by the sensor probe fixing screw 14 to form an eddy current terminal detection structure, And each target plate bracket group includes two target plate brackets 22 symmetrically arranged on both sides of the formed concrete specimen 4 to be tested.

Please refer to Fig. 1 and shown in Fig. 2, each sensor probe support 21 and target plate support 22 are L-shaped support plates, and each sensor probe support 21 includes a sensor support bottom plate 216 parallel to the sides of the formed concrete specimen 4 to be detected And the sensor support plate 211 that is vertically arranged with this sensor support base plate 216; Each target plate support 22 comprises the target plate support base plate 225 that is parallel to the side surface of the shaped concrete specimen 4 to be detected and this target plate support base plate 225 is vertically arranged The target plate 221 of. The plane of the target plate 221 is perpendicular to the axis of each sensor probe 13 .

Please refer to Fig. 1 and shown in Fig. 2, sensor support base plate 216 is provided with two sensor support longitudinal and transverse reinforcing plates 212,213 and offers two sensor support bolt holes 214 for fixing supports, and sensor support plate 211 has provided sensor Probe mounting holes 215; each sensor bracket 21 is locked and fixed by a matching sensor bracket fixing bolt 31, and the sensor bracket fixing bolt 31 is provided with a sensor bracket bolt washer 311; preferably: the two sensor brackets The bolt holes 214 are symmetrically distributed on both sides of the centerline of the sensor probe bracket 21 , and the installation holes of the sensor probe 13 are located on the centerline of the sensor bracket plate 211 . Two sensor bracket longitudinal reinforcing plates 212 are arranged in parallel and fixed on the outer surface of the sensor bracket base plate 216, and the two sensor bracket transverse reinforcing plates 213 are respectively fixed on the outer sides of the two sensor bracket longitudinal reinforcing plates 212 to form a sensor probe bracket Strengthen the structure.

Please refer to Fig. 1 and shown in Fig. 2, two target support longitudinal and transverse reinforcement plates 222, 223 are provided on the target support bottom plate 225 and two target support bolt holes 224 are provided for fixing the support. The target bracket 22 is locked and fixed by the matching target bracket fixing bolt 32, and the target bracket fixing bolt 32 is provided with a target bracket bolt washer 321. In order to test the shrinkage of the length sample between the probe bracket fixing screw and the target bracket fixing screw; preferably: the two target bracket bolt holes 224 are symmetrically distributed on both sides of the center line of the target plate bracket 22, so The two target bracket longitudinal reinforcing plates 222 are arranged in parallel and fixed on the outer side of the target bracket bottom plate 225, and the two target bracket transverse reinforcing plates 223 are respectively fixed on the outer sides of the two target bracket longitudinal reinforcing plates 222 , forming a strengthening structure of the target plate bracket.

Please refer to FIG. 1 and FIG. 2 , the number of extended sensor probes is 2-6, and then the number of sensor probes 13 is 2-6, and the number of test pieces that can be tested at the same time is 1-3.

Please refer to Fig. 1 and Fig. 2, the target plate 221 is weakly magnetically permeable material such as aluminum, aluminum alloy, etc., the surface of the target plate 221 facing the probe is smooth, and the height of the target plate should be higher than the sensor support plate 211. The plate 221 and the sensor support plate 211 are respectively perpendicular to the target plate support bottom plate 225 and the sensor support bottom plate 216 .

When the present invention is in use, as shown in Fig. 1 and Fig. 2, a creep concrete specimen 4 is formed according to the requirements of GB/T 50082-2009 "Standards for Test Methods of Long-term Performance and Durability of Ordinary Concrete". Before forming the concrete specimen, place eight holes on both sides of the test mold (the holes for the sensor bracket fixing bolt 31 and the target bracket fixing bolt 32 are opened in advance on the sides according to the standard requirements, and the test mold is a matching test mold). Bracket fixing bolts 31, 32 (washers 311, 321 are temporarily not placed), after the bracket fixing bolts are placed, the concrete specimen 4 is formed.

Please refer to Fig. 1 and Fig. 2. After the concrete test piece 4 is formed, it is maintained according to the standard requirements, and the formwork is removed. Require the age, take out the concrete test piece 4, erect, get a set of deformation measuring device of the present invention, place the corresponding support bolt washers on the support positioning bolts 31, 32 on each side of the concrete test piece 4, and then place the corresponding support bolt washers on the corresponding Sensor probe support 21 and target plate support 22 are installed on the anchor bolts, the nuts are installed, and the supports are anchored. After anchoring, the planes of the sensor bracket bottom plate 216 and the target bracket bottom plate 225 are parallel to the concrete side, and on the same plane, the center line of the sensor probe bracket and the target plate bracket coincides with the center line of the concrete side to ensure that the sensor bracket plate The plane 211 is parallel to the plane of the target plate 221 . Install the sensor probe 13 in the sensor probe mounting hole 215 of the sensor bracket plate 211 (the sensor probe 13, the sensor extension cable 12 and the data acquisition display 11 have been connected before), tighten the sensor probe fixing screw 14, and fix the sensor probe 13. The axis of the installed sensor probe 13 should be perpendicular to the plane of the target plate 221 .

After installing the device, turn on the power of the data acquisition system, and then use the spring-type compression creep tester to conduct tests according to the requirements of GB/T 50082-2009 "Standards for Test Methods of Long-term Performance and Durability of Ordinary Concrete".

The above records are only examples of using the technical content of this creation. Any modifications and changes made by those who are familiar with this technology using this creation belong to the scope of patents claimed by this creation, and are not limited to those disclosed in the examples.

Claims (9)

1. a current vortex time deformation measuring device, it is characterised in that: this measurement apparatus include current vortex sensing device and It is connected with this current vortex sensing device and realizes the support that terminal detects, wherein:

Current vortex sensing device, it includes the data acquisition display apparatus that is sequentially connected with and a plurality of extension sensor measuring head, every Extension sensor measuring head be all connected with data acquisition display apparatus realize determinand terminal time deformation test, described every extension Formula sensor measuring head includes sensor extension cable and the sensor probe forming sensor measuring passage；

Support, they multiple sensor probe support groups including being arranged at determinand both sides and target board mount group, and each biography Sensor probe bracket group includes two sensor probe supports being symmetricly set in determinand both sides, and each sensor probe is the most logical Cross sensor probe fixed screw and lock onto sensor probe stent outer formation current vortex end-probing structure, and each Target board mount group includes two target board mounts being symmetricly set in determinand two sides;

Described each sensor probe support and target board mount are L shape support plate, and each sensor probe support includes and treats Survey the parallel sensor stand base plate in thing side and with this sensor stand base plate vertically disposed sensor stand plate；Each mark Target plate support includes the target board mount base plate parallel with determinand side and this target vertically disposed target of board mount base plate Plate；

Described sensor stand base plate is provided with twice sensor stand vertical, horizontal reinforcing plate and offers two support bracket fastened biographies Sensor bracket bolt hole, and sensor probe installing hole offered by sensor stand plate；Described each sensor stand passes through phase The sensor stand of coupling is fixed the bolt realization that matches and is locked, and this sensor stand is fixed and is provided with sensing on bolt Device support bracket bolt packing ring.

A kind of current vortex time deformation measuring device the most according to claim 1, it is characterised in that: described target plate Plane and the axis perpendicular of each sensor probe.

A kind of current vortex time deformation measuring device the most according to claim 1, it is characterised in that: said two senses What device bracket bolt holes was all symmetrical is distributed in sensor probe carriage center line both sides, and sensor probe mounting hole site is in sensor On supporting plate centrage.

A kind of current vortex time deformation measuring device the most according to claim 3, it is characterised in that: described twice sense The longitudinally reinforced plate of device support be arranged in parallel and is fixed on sensor stand plate outer side face, and described twice sensor stand is horizontal It is individually fixed in the outside of the longitudinally reinforced plate of twice sensor stand to reinforcing plate, forms sensor probe support reinforcement structure.

A kind of current vortex time deformation measuring device the most according to claim 1, it is characterised in that: described target support Base plate is provided with twice target support vertical, horizontal reinforcing plate and offers two support bracket fastened target bracket bolt holes, described often Individual target support coordinates realization to be locked by the target bracket fixing bolt matched, and on this target bracket fixing bolt It is provided with target support bracket bolt packing ring.

A kind of current vortex time deformation measuring device the most according to claim 5, it is characterised in that: two target supports What bolt hole was all symmetrical is distributed in target board mount centrage both sides.

A kind of current vortex time deformation measuring device the most according to claim 6, it is characterised in that: described twice target The longitudinally reinforced plate of support be arranged in parallel and is fixed on target support base plate lateral surface, and described twice target support is laterally strengthened Plate is individually fixed in the outside of the twice longitudinally reinforced plate of target support, forms target board mount reinforcement structure.

A kind of current vortex time deformation measuring device the most according to claim 1, it is characterised in that: described extension passes Sense detecting head quantity is 2-6 bar, and then the quantity obtaining sensor probe is 2-6, and the quantity that can simultaneously test test specimen is 1-3 Individual.

A kind of current vortex time deformation measuring device the most according to claim 1, it is characterised in that: described target plate is Aluminum, aluminium alloy soft magnetically permeable material, target plate is higher than sensor stand plate towards the smooth surface of probe, the height of target plate, Target plate, sensor stand plate are respectively perpendicular to target support base plate, sensor stand base plate.