CN202734754U

CN202734754U - Sensor for measuring hinged seam shearing deformation

Info

Publication number: CN202734754U
Application number: CN 201220334607
Authority: CN
Inventors: 俞博; 江祥林; 叶见曙; 易汉斌; 张冬兵; 曾国良
Original assignee: 俞博
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2013-02-13
Anticipated expiration: 2022-07-12

Abstract

Provided is a sensor for measuring hinged seam shearing deformation, which adopts the strain bridge sensing principle. The sensor is composed of a beam (1), a pedestal (2), a fixing device (3), a strain bridge (4), and an output cable (5), wherein the upper and lower surfaces of two sides of the beam are each glued with two foil gauges to form a full bridge which carries out output via a four-core cable; the E is a power supply for the electrical bridge; and the u is the output of the electrical bridge. The pedestal crosses the hinged seam and is glued to two sides of the hinged seam. When the hinged seam experiences shearing deformation, the foil gauges glued to the upper and lower surfaces of the sensor beam transform the strain generated by the beam into the voltage signals proportional to the shearing deformation via the strain gauge and then send the signals to a recorder. The sensor of the utility model features simple structure and high precision and has sophisticated data acquisition instrument. The sensor is easy and simple to operate and capable of effectively measuring the shearing deformation.

Description

A kind of sensor of measuring hinged seam detrusion

Technical field

The utility model relates to a kind of sensor of measuring detrusion, especially relates to a kind of sensor for measuring the hinged seam detrusion of bridge.

Background technology

The assembly concrete Hollow Slab Beam Bridge is widely used a kind of beam type bridge type in highway in China and the urban road.In recent years, the main disease that this bridge type occurs is the hinge seam place that occurs in cored slab, shows as deck paving when serious along cored slab hinge seam longitudinal cracking.When damage occurs in the hinge seam, can have influence on articulated slab beam bridge superstructure holistic resistant behavior, generally came indirect reaction hinge seam degree of injury with the load cross direction profiles in the past.The hinge seam is to be subjected to shearing as main, and when damage occured the hinge seam, its detrusion meeting phase strain was large, and therefore measuring the detrusion of hinge seam has very heavy meaning to estimating hinge seam degree of injury.

Adopt at present classic method can measure hinged seam detrusion, such as in hinge seam both sides clock gauge being installed, calculate detrusion by the difference of clock gauge, the general needs of this method are set up support, and can only tested static.

Summary of the invention

The purpose of this utility model is passed judgment on the method for hinge seam degree of injury with the detrusion value in order to solve above-mentioned proposition, thereby invented a kind of sensor of measuring the detrusion of hinge seam, this sensor has simple structure, precision is high, ripe data collecting instrument is arranged, use the characteristics such as simple to operation, can effectively measure detrusion.

To achieve these goals, the technical solution adopted in the utility model is:

A kind of sensor of measuring hinged seam detrusion, comprise and measure beam, strainmeter, pedestal, it is characterized in that: also comprise be used to the stationary installation that sticks on pedestal on the measured object and fixation measuring beam and pedestal, the strain bridge that is used for forming metering circuit, cable and the strainmeter of output electrical signals, respectively post two foil gauges in the top and bottom, both sides of measuring beam, foil gauge outputs to strainmeter by quad after forming strain bridge.

The utility model has adopted the strain bridge sensing principle, respectively posts two foil gauges in the top and bottom, both sides of measuring beam, exports by quad behind the composition full-bridge.The displacement transducer equivalent electrical circuit as shown in Figure 2.R1, R2 are the foil gauge of beam upper surface among the figure, and R3, R4 are the foil gauge of lower surface, and E is bridge power supply, and u is the output of electric bridge.Pedestal is striden hinged seam and is sticked on hinged seam both sides, and when hinged seam generation detrusion, the foil gauge that is attached to the upper and lower surface of sensor beam converts the strain that beam produces to be directly proportional with detrusion voltage signal by strainmeter, then gives registering instrument.

The utility model compared with prior art has the following advantages: 1, principles of construction is simple, and sensor mainly forms full-bridge circuit by 4 foil gauges, and principles of construction is simple, and reliable operation is cheap, is convenient to promote; 2, measuring accuracy is high, can reach 5 * 10 to the test result display precision of sample sensor ^-4Mm; 3, can realize quiet dynamic acquisition, the strain acquirement technology is very ripe at present, adopts corresponding quiet dynamic strain Acquisition Instrument just can finish corresponding function; 4, easy to use, as long as sensor is sticked on tested hinge to be sewed on, do not need to set up in addition support during measurement.

Description of drawings

Fig. 1 forms structural representation for the hinged seam detrusion of the measurement sensor that the utility model provides;

The schematic equivalent circuit that Fig. 2 provides for the utility model.

Embodiment

As shown in Figure 1, a kind of sensor of measuring hinged seam detrusion comprises the stationary installation 3 of measuring beam 1, being used for sticking on pedestal, fixation measuring beam and pedestal on the measured object, the strain bridge 4 that is used for forming metering circuit, cable 5 and the strainmeter of output electrical signals.The utility model has adopted the strain bridge sensing principle, respectively posts two foil gauges in the top and bottom, both sides of beam, exports by quad behind the composition full-bridge.The displacement transducer equivalent electrical circuit as shown in Figure 2.R1, R2 are the foil gauge of beam upper surface among the figure, and R3, R4 are the strainometer of lower surface, and E is bridge power supply, and u is the output of electric bridge.Pedestal is striden hinged seam and is sticked on its both sides, and when hinged seam generation detrusion, the foil gauge that is attached to the upper and lower surface of sensor beam converts the strain that beam produces to be directly proportional with detrusion voltage signal by strainmeter, then gives registering instrument.

Claims

1. sensor of measuring hinged seam detrusion, comprise and measure beam, strainmeter, pedestal, it is characterized in that: also comprise be used to the stationary installation that sticks on pedestal on the measured object and fixation measuring beam and pedestal, the strain bridge that is used for forming metering circuit, cable and the strainmeter of output electrical signals, respectively post two foil gauges in the top and bottom, both sides of measuring beam, foil gauge outputs to strainmeter by quad after forming strain bridge.

2. a kind of sensor of measuring hinged seam detrusion as claimed in claim 1, it is characterized in that: described strain bridge circuit is by the foil gauge (R1, R2) of measuring the beam upper surface, the foil gauge of lower surface (R3, R4) forms, and also is provided with the strain bridge power supply, the output terminal of strain bridge.