WO1997004290A1 - Transducer bar - Google Patents
Transducer bar Download PDFInfo
- Publication number
- WO1997004290A1 WO1997004290A1 PCT/SE1995/000882 SE9500882W WO9704290A1 WO 1997004290 A1 WO1997004290 A1 WO 1997004290A1 SE 9500882 W SE9500882 W SE 9500882W WO 9704290 A1 WO9704290 A1 WO 9704290A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- accordance
- mounting
- rails
- base
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/02—Electric devices associated with track, e.g. rail contacts
- B61L1/06—Electric devices associated with track, e.g. rail contacts actuated by deformation of rail; actuated by vibration in rail
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
- G01G19/042—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles having electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
- G01G19/045—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles for weighing railway vehicles in motion
Definitions
- the invention relates to a device as described in the introduction to patent claim 1.
- sensor elements are attached directly to the rails by bonding or welding.
- the rails must first be cleaned and the sensor element mounting surface carefully ground to ensure that it is even. After grinding, the sensor element mounting location is marked off in the neutral plane and is cleaned thoroughly.
- the sensor elements are attached by bonding or welding, and are then connected electrically. Following connection, the elements and connection points are provided with moisture protection and physical protection.
- the mounting operation must be carried out with great care and in good weather conditions, which may be difficult to assure outdoors.
- the alternative is to prefabricate the rails, with the sensor elements attached, in the factory, which causes major disruption to rail traffic when the prefabricated rails are subsequently laid on the track. The same problems arise in the course of tracklaying and track maintenance work.
- the present invention relates to a sensor device for indicating static or dynamic load, preferably from railbound vehicles.
- FIG. 1 Examples of the mechanical arrangement, electrical arrangement and installation are shown in Fig. 1, Fig. 2 and Fig. 3 respectively.
- the sensor beam consists of a base (1) with strain gauges (2) attached, together with moisture protection as well as physical protection.
- the sensor beam is mounted on the object in which the load is to be measured by means of bolts and nuts or, alternatively, by bonding or welding.
- the resultant deformation of the rail is transmitted to the beam, whose sensor element registers the deformation and converts it into an electrical signal.
- Fig. 3 shows two sensors, one mounted on each side of the web. This operation can normally be carried out without disruption to rail traffic; mounting of the sensor can be carried out very quickly and the work can be completed regardless of the weather.
Abstract
On rail tracks equipped with strain gauges, sensor elements are attached directly to the rails by bonding or welding and are then connected electrically, which may be carried out either at site or as part of the prefabrication of rails at the factory. Both methods involve considerable work on the track, which disrupts and is disrupted by rail traffic. The aforementioned problems also arise in the course of tracklaying and track maintenance work, The invention solves this problem by mounting prefabricated sensor beams on the rails using bolts and nuts.
Description
TRANSDUCER BAR
The invention relates to a device as described in the introduction to patent claim 1.
On rail tracks equipped with strain gauges, sensor elements are attached directly to the rails by bonding or welding. The rails must first be cleaned and the sensor element mounting surface carefully ground to ensure that it is even. After grinding, the sensor element mounting location is marked off in the neutral plane and is cleaned thoroughly. The sensor elements are attached by bonding or welding, and are then connected electrically. Following connection, the elements and connection points are provided with moisture protection and physical protection. The mounting operation must be carried out with great care and in good weather conditions, which may be difficult to assure outdoors. The altemative is to prefabricate the rails, with the sensor elements attached, in the factory, which causes major disruption to rail traffic when the prefabricated rails are subsequently laid on the track. The same problems arise in the course of tracklaying and track maintenance work.
The present invention relates to a sensor device for indicating static or dynamic load, preferably from railbound vehicles.
Examples of the mechanical arrangement, electrical arrangement and installation are shown in Fig. 1, Fig. 2 and Fig. 3 respectively.
As shown in Fig. 1, the sensor beam consists of a base (1) with strain gauges (2) attached, together with moisture protection as well as physical protection. The sensor beam is mounted on the object in which the load is to be measured by means of bolts and nuts or, alternatively, by bonding or welding. When the measured object is subjected to a force, the resultant deformation of the rail is transmitted to the beam, whose sensor element registers the deformation and converts it into an electrical signal.
When mounting the sensor beam on the rail, the latter may be drilled using a template, eliminating the need for precise marking out. The sensor is then mounted on the web of the rail by means of bolts and nuts. Fig. 3 shows two sensors, one mounted on each side of the web. This operation can normally be carried out without disruption to rail traffic; mounting of the sensor can be carried out very quickly and the work can be completed regardless of the weather.
Claims
1. Device designed for recording static or dynamic load on an object, preferably a rail, consisting of a sensor base (1) provided with sensor elements (2), such as strain gauges, for shear measurement, together with connection leads, moisture protection and physical protection, characterised in that the sensor base is provided with at least three mounting holes perpendicular to the plane of the sensor element, positioned so that at least one mounting hole is located on each side of the sensor elements, for mounting the sensor on the object on which the forces are to be measured.
2. Device in accordance with patent claim 1 , characterised in that the sensor elements are connected in the form of a Wheatstone bridge (Fig. 2).
3. Device in accordance with patent claim 1 , characterised in that a device is mounted on each side of the rail to increase the accuracy of measurement (Fig. 3).
4. Device in accordance with patent claim 2, characterised in that the sensor elements form one half of a Wheatstone bridge, the other half consisting of resistances to detect the passage of axles.
5. Device in accordance with patent claim 1, characterised in that the sensor base is provided with reinforcement at the mounting holes to distribute the force from the mounting bolts in the holes to the sensor base.
6. Device in accordance with patent claim 1 , characterised in that the underside of the sensor base around the mounting holes is raised to ensure that the sensor base bears against the measurement object only at the mounting points.
7. Device in accordance with patent claims 1-6, characterised in that the sensor is provided with an additional mounting hole for another type of sensor, such as an accelerometer, for recording wave propagation in the measurement object. In this case, the signals received from the sensor are clearly recognisable from each other in time.
8. Device in accordance with patent claim 7, characterised in that the sensor elements are compensated for temperature variations.
9. Device in accordance with patent claim 8, characterised in that the sensor base is provided with four mounting holes.
10. Device in accordance with patent claim 9, characterised in that the sensor base is welded to the object at interfaces between base and object, or that the sensor base is bonded to the object.
On rail tracks equipped with strain gauges, sensor elements are attached directly to the rails by bonding or welding and are then connected electrically, which may be carried out either at site or as part of the prefabrication of rails at the factory. Both methods involve considerable work on the track, which disrupts and is disrupted by rail traffic. The aforementioned problems also arise in the course of tracklaying and track maintenance work. The invention solves this problem by mounting prefabricated sensor beams on the rails using bolts and nuts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SE1995/000882 WO1997004290A1 (en) | 1995-07-21 | 1995-07-21 | Transducer bar |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SE1995/000882 WO1997004290A1 (en) | 1995-07-21 | 1995-07-21 | Transducer bar |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997004290A1 true WO1997004290A1 (en) | 1997-02-06 |
Family
ID=20397521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1995/000882 WO1997004290A1 (en) | 1995-07-21 | 1995-07-21 | Transducer bar |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1997004290A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004027355A1 (en) * | 2002-09-20 | 2004-04-01 | Avery Berkel Limited | Rail load measuring apparatus |
WO2010100299A2 (en) * | 2009-03-05 | 2010-09-10 | Product & Process Development, S.L. | Method and means for using extensomeric sensors on railway lines |
CN102538928A (en) * | 2011-11-24 | 2012-07-04 | 中铁工程设计院有限公司 | Automatic aligning and weighing system for locomotive bogie |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780817A (en) * | 1969-02-28 | 1973-12-25 | J Videon | Weighing devices |
US4042049A (en) * | 1975-09-29 | 1977-08-16 | Structural Instrumentation, Inc. | Vehicle load measuring system |
DE3206611C1 (en) * | 1982-02-24 | 1983-10-06 | Siemens Ag | Rail contact |
GB2216671A (en) * | 1988-04-27 | 1989-10-11 | Avery Ltd W & T | Weighing apparatus for rail vehicles |
EP0560262A1 (en) * | 1992-03-10 | 1993-09-15 | Gerd R. Dipl.-Ing. Wetzler | Load-related switching signals generating method on railway tracks |
US5327791A (en) * | 1992-01-16 | 1994-07-12 | Walker Robert R | Vehicle beam load measuring system |
-
1995
- 1995-07-21 WO PCT/SE1995/000882 patent/WO1997004290A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780817A (en) * | 1969-02-28 | 1973-12-25 | J Videon | Weighing devices |
US4042049A (en) * | 1975-09-29 | 1977-08-16 | Structural Instrumentation, Inc. | Vehicle load measuring system |
DE3206611C1 (en) * | 1982-02-24 | 1983-10-06 | Siemens Ag | Rail contact |
GB2216671A (en) * | 1988-04-27 | 1989-10-11 | Avery Ltd W & T | Weighing apparatus for rail vehicles |
US5327791A (en) * | 1992-01-16 | 1994-07-12 | Walker Robert R | Vehicle beam load measuring system |
EP0560262A1 (en) * | 1992-03-10 | 1993-09-15 | Gerd R. Dipl.-Ing. Wetzler | Load-related switching signals generating method on railway tracks |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004027355A1 (en) * | 2002-09-20 | 2004-04-01 | Avery Berkel Limited | Rail load measuring apparatus |
WO2010100299A2 (en) * | 2009-03-05 | 2010-09-10 | Product & Process Development, S.L. | Method and means for using extensomeric sensors on railway lines |
WO2010100299A3 (en) * | 2009-03-05 | 2010-11-11 | Product & Process Development, S.L. | Method and means for using extensomeric sensors on railway lines |
ES2352774A1 (en) * | 2009-03-05 | 2011-02-23 | PRODUCT & PROCESS DEVELOPMENT, S.L. | Method and means for using extensomeric sensors on railway lines |
US8892368B2 (en) | 2009-03-05 | 2014-11-18 | Product & Process Development, S.L. | Method for applying extensometric sensors in railway tracks |
CN102538928A (en) * | 2011-11-24 | 2012-07-04 | 中铁工程设计院有限公司 | Automatic aligning and weighing system for locomotive bogie |
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