CN202836839U - Full-bridge resistor strain sensor - Google Patents
Full-bridge resistor strain sensor Download PDFInfo
- Publication number
- CN202836839U CN202836839U CN 201220425160 CN201220425160U CN202836839U CN 202836839 U CN202836839 U CN 202836839U CN 201220425160 CN201220425160 CN 201220425160 CN 201220425160 U CN201220425160 U CN 201220425160U CN 202836839 U CN202836839 U CN 202836839U
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- China
- Prior art keywords
- housing
- resistance strain
- full
- strain gage
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to a full-bridge resistor strain sensor. The utility model is characterized in that a bottom part of a housing is provided with a resistance strain gage; the housing is made of metal materials. When in use, the sensor provided in the utility model is closely cooperated with a track, and can be fixedly disposed in an inner side of the track. The resistance strain gage is disposed on a bottom part of the housing, and adopts the integral full-bridge connection way. During the conversion from a mechanical signal to an electric signal, the signal is not affect by the change of the external temperature, therefore the mechanical strain generated by the internal stress of the track can be accurately detected, the data drift phenomenon can be overcome, and the waterproof function as well as the dustproof function can be permanently effective.
Description
Technical field
The utility model relates to the technical field of sensor, and specifically a kind of sensor of surveying railway track track internal stress refers in particular to a kind of full-bridge type resistance strain type sensor.
Background technology
At present, knownly only adopt SMD foil gauge for track internal stress sniffer, adopt glue that it is attached to the side of rail, when rail stress changes, rail also produces trickle distortion, and foil gauge can be converted into measurable trickle change in electric with the machinery variation of stress.But, the mode that adopts glue to install, time one long easy binding dust and water comes off easily.The poor strain gauge adhesion that yet can cause of the degree of polishing flat of Rail Surface is not firm, and rail is poor to electric signal amount conversion accuracy from the different mechanical strain amounts that cause of magnification ratio of SMD foil gauge, the drift phenomenon that existence can't overcome, the signal that makes the mistake easily.
Summary of the invention
The purpose of this utility model is to provide a kind of improved full-bridge type resistance strain type sensor, it can overcome time one long easy binding dust and water in the prior art, come off easily, have simultaneously the drift phenomenon that can't overcome, the some shortcomings of the signal that makes the mistake easily.
To achieve these goals, the technical solution of the utility model is: a kind of full-bridge type resistance strain type sensor, and it mainly comprises housing, it is characterized in that: the bottom of housing is provided with a resistance strain gage, and described housing adopts metal material to make.
During use, sensor of the present utility model and track closely cooperate, can firmly be installed in track inside, resistance strain gage is arranged on the bottom of housing, and resistance strain gage adopts whole full-bridge type connected mode, change in the change in electric process at machinery, signal is not subjected to ambient temperature to change the impact that brings fully, detects accurately the mechanical type strain that the track internal stress produces, and can overcome the data drift phenomenon, waterproof and dustproof, effectively permanent.
Description of drawings
Fig. 1 is the structural representation of the utility model housing.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 be among Fig. 1 A-A to cut-open view.
Fig. 4 is the local enlarged diagram among Fig. 3.
Fig. 5 is the structural representation of the utility model resistance strain gage.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Each attached number in the figure is expressed as follows: 1 housing, 2 vertical cylinders, 3 horizontal cylinders, 4 resistance strain gages, 5 metal cover boards, 6 substrates, 7 pins, 8 connecting holes.
The utility model mainly comprises housing, and its difference with the prior art is: the bottom of housing is provided with a resistance strain gage, and described housing adopts metal material to make.Described housing is T-shaped shape, housing is formed by connecting with laterally cylinder is vertical by vertical cylinder, vertically the diameter of cylinder is 6-30mm, be provided with blind hole in vertical cylinder, resistance strain gage is arranged on the bottom of blind hole, the size of blind hole is 5-28mm, and the diameter of resistance strain gage is less than or equal to the diameter of vertical cylinder.Laterally a side of cylinder is provided with connecting hole, so that the pin of resistance strain gage can stretch out from connecting hole, the top of housing is provided with metal cover board.
Described resistance strain gage is provided with substrate, and substrate is provided with 4 uniform pins, and pin and substrate are the angle (structure of resistance strain gage is referring to Fig. 5) of 45o-135o.Resistance strain gage adopts glue to be attached to the bottom of blind hole, and 4 pins stretch out outside the metal shell, and convenient and follow-up signal pickup assembly is connected.
In force, the bottom of vertical cylinder of housing is provided with a blind hole, and the bottom of blind hole is smooth, and a resistance strain gage adopts glue to stick on the blind hole bottom, makes it firm, the same size of the diameter in described resistance strain gage diameter and hole.Housing outer surface adopts finishing, and the hole that this housing and rail process in advance can form interference fit, makes by interference fit that sensor is permanent to be installed on the rail, obscission can not occur.Resistance strain gage adopts whole full-bridge type connected mode, changes in the change in electric process at machinery, and signal is not subjected to ambient temperature to change the impact that brings fully, thoroughly solves the temperature phenomenon of wafing.
Claims (4)
1. full-bridge type resistance strain type sensor, it mainly comprises housing, it is characterized in that: the bottom of housing is provided with a resistance strain gage, and described housing adopts metal material to make.
2. a kind of full-bridge type resistance strain type sensor according to claim 1, it is characterized in that: described housing is T-shaped shape, housing is formed by connecting with laterally cylinder is vertical by vertical cylinder, vertically the diameter of cylinder is 6-30mm, be provided with blind hole in vertical cylinder, resistance strain gage is arranged on the bottom of blind hole, and the size of blind hole is 5-28mm, and the diameter of resistance strain gage is less than or equal to the diameter of vertical cylinder.
3. a kind of full-bridge type resistance strain type sensor according to claim 2 is characterized in that: laterally a side of cylinder is provided with connecting hole, and the top of housing is provided with metal cover board.
4. a kind of full-bridge type resistance strain type sensor according to claim 1, it is characterized in that: described foil gauge is provided with substrate, and substrate is provided with 4 uniform pins, and pin and substrate are the angle of 45o-135o.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425160 CN202836839U (en) | 2012-08-27 | 2012-08-27 | Full-bridge resistor strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425160 CN202836839U (en) | 2012-08-27 | 2012-08-27 | Full-bridge resistor strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836839U true CN202836839U (en) | 2013-03-27 |
Family
ID=47948521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220425160 Expired - Fee Related CN202836839U (en) | 2012-08-27 | 2012-08-27 | Full-bridge resistor strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836839U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900409A (en) * | 2019-04-04 | 2019-06-18 | 东北大学 | A kind of static breaking agent is radially expanded pressure test method |
-
2012
- 2012-08-27 CN CN 201220425160 patent/CN202836839U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900409A (en) * | 2019-04-04 | 2019-06-18 | 东北大学 | A kind of static breaking agent is radially expanded pressure test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20200827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |