CN202106991U - Steel rail temperature stress monitoring device - Google Patents
Steel rail temperature stress monitoring device Download PDFInfo
- Publication number
- CN202106991U CN202106991U CN201120140230XU CN201120140230U CN202106991U CN 202106991 U CN202106991 U CN 202106991U CN 201120140230X U CN201120140230X U CN 201120140230XU CN 201120140230 U CN201120140230 U CN 201120140230U CN 202106991 U CN202106991 U CN 202106991U
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- Prior art keywords
- temperature stress
- monitoring device
- bloom
- railroad
- stress monitoring
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Abstract
The utility model discloses a steel rail temperature stress monitoring device, including a sensor module, a signal processing and transporting module, a transmitter module and a receiving device; the sensor module outputs a voltage signal; after receiving the voltage signal output from the sensor module, the signal processing and transporting module performs amplification treatment to the voltage signal and stores a voltage signal data; then the signal is transmitted by the transmitter module and received by the receiving device; and the sensor module includes a steel block and a full-bridge type strain gauge transducer which is disposed on the steel block. The steel rail temperature stress monitoring device can monitor temperature stress change condition of utilized railway steel rail in long-term and multi-point monitoring way, is automatically operated and can judge a sudden change condition of steel rail temperature stress in time; configuration of the steel block can compensate for strain loss owing to adhesion of the steel block by using a glue and guarantee strain transmission accuracy; the full-bridge type strain gauge has a high reaction sensitivity; and a Zigbee wireless transmission mode permits a long transmission distance such that a unit relay station can cover a plurality monitoring devices.
Description
Technical field
The utility model relates to a kind of monitoring device of railway rail temperature stress.
Background technology
The rail profile of the railway continuous rail that generally adopts at present is interconnective, and the stress in the rail receives the influence of ambient temperature bigger.The linear expansion factor α of carbon structural steel, chromium steel
1All 10～14 * 10
-6(1/ ℃) scope, to the object of club shaped structure, when two ends fixedly the time, the thermal stress that produces during temperature traverse Δ T does
σ＝-α
1EΔT
Wherein, E is the modulus of elasticity of material, common iron E=206GPa, and when rail bears the temperature action of-30 to 70 degrees centigrade of scopes in the open air, its maximum thermal stress σ
MaxPossibly reach σ
Max=283MPa.
The rail of laying at normal temperatures, the range of stress of generation is ± 142Mpa the yield point σ of carbon structural steel
SGenerally greater than 220MPa, rail can bear open-air temperature stress fully and be unlikely to be destroyed.When the temperature when rail temperature and installation rail there are differences, because the coefficient of thermal expansion and contraction of rail is not equal to the coefficient of thermal expansion and contraction of roadbed, thereby at inner longitudinal stretching or the compressing stress of producing of rail.Along with the increase of the temperature difference, very easily cause the crooked even fracture of rail.Traditional rail circuit method can utilize the break-make of rail circuit to come to monitor easily whole fracture defect; But for flexural failure and part fracture; Traditional rail circuit method can't realize monitoring, and flexural failure is the major cause of derailment, and it endangers much larger than the rail fracture fault; Therefore need a kind of monitoring device or system to realize the stress in the rail is monitored, and whether rail is in safe range makes judgement.
All there is shortcoming separately in existing monitoring technology, and is complicated like installing/dismounting, and may have influence on the operation of railway, can not carry out monitoring at any time by counter stress; The scheme that need not frequently dismantle can damage rail again, and problem such as the data precision of gained is not high.
The utility model content
The utility model has overcome the deficiency of prior art, provides that a kind of ability is long-time, the rail monitoring device of the railway rail temperature stress changing condition in the multiple spot monitoring utilization, and can automatic operating, in time judges the sudden change situation of Railroad's Temperature Stress.
For solving above-mentioned technical matters, the utility model adopts following technical scheme:
A kind of Railroad's Temperature Stress monitoring device; Comprise sensor assembly, signal conditioning and transport module, transmitter module, receiving device, the sensor assembly of output voltage signal, the signal conditioning and the transport module of reception and processes voltage signal; Signal conditioning is communicated by letter with receiving device through transmitter module with transport module; Be voltage signal of sensor assembly output, after signal conditioning and transport module receive the voltage signal that sensor assembly exports, voltage signal amplified and handles; And storage voltage signal data; Be transmitted to receiving device through transmitter module again, said sensor assembly comprises bloom and is arranged on the strain-ga(u)ge transducer on the bloom that said strain-ga(u)ge transducer is the full-bridge type strain-ga(u)ge transducer.
In order to realize the utility model better, make further technological improvement below:
As preferably, said bloom be shaped as " worker " font, the thickness at bloom middle part is thinner than the upper and lower, the width at said bloom middle part is narrower than the upper and lower.
As preferably, said full-bridge type strain-ga(u)ge transducer is one, is arranged on the plane of bloom.
As preferably, said full-bridge type strain-gauge is two, is arranged on the two sides of bloom.
As preferably, said sensor assembly and signal conditioning and transport module are encapsulated in the machine box.
As preferably, said sensor assembly also comprises temperature sensor.
As preferably, be provided with amplifier chip and singlechip chip in said signal conditioning and the transport module.
As preferably, said transmitter module adopts wireless transport module, available ZigBee wireless transport module.
As preferably, said signal receiving device is hand-held receiver or repeater station receptor.
The rail monitoring device of the utility model can also be following technical scheme:
As preferably, also comprise battery and battery detection chip.
Compared with prior art, the beneficial effect of the utility model is:
In the utility model technical scheme, the thickness at bloom middle part is thinner than the upper and lower, and the width at middle part is narrower than the upper and lower; Be that bloom adopts the thin slightly narrow slightly design in middle part; Reduced the bloom strain loss that is caused less than the bloom modulus of elasticity because of the assembly glue modulus of elasticity, guaranteed that the strain signal that the full-bridge type strain-gauge obtains is consistent with the rail strain, wireless transport module can adopt the ZigBee transmission over radio; Long transmission distance, single repeater station can cover a plurality of Railroad's Temperature Stress monitoring devices.
The utility model can be long-time, the railway rail temperature stress changing condition in the multiple spot monitoring utilization, and can automatic operating, in time judges the sudden change situation of Railroad's Temperature Stress.
Description of drawings
Fig. 1 is the utility model embodiment one bloom structural representation;
Fig. 2 is the utility model embodiment one full-bridge type strain-gauge principle schematic;
Fig. 3 is the utility model embodiment one full-bridge type strain-gauge model scheme drawing;
Fig. 4 pastes scheme drawing for the utility model embodiment one bloom on rail;
Fig. 5 is that the utility model embodiment two blooms and full-bridge type strain-gauge are pasted scheme drawing.
Wherein, the pairing name of the Reference numeral in the accompanying drawing is called:
The 1-rail, 2-bloom, 3-full-bridge type strain-ga(u)ge transducer.
The specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is done to specify further, but the embodiment of the utility model is not limited thereto.
Embodiment one
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4; A kind of Railroad's Temperature Stress monitoring device; Comprise sensor assembly, signal conditioning and transport module, transmitter module, receiving device, sensor assembly comprises bloom 2 and is arranged on the full-bridge type strain-ga(u)ge transducer 3 on the bloom 2 that the thickness at bloom 2 middle parts is thinner than limit upper and lower; The width at bloom 2 middle parts is narrower than the upper and lower, bloom 2 be shaped as " worker " font.When full-bridge type strain-ga(u)ge transducer 3 was one, the back side at above-mentioned bloom 2 middle parts made it attenuation through after cutting, and the front of above-mentioned bloom 2 is a plane, and full-bridge type strain-ga(u)ge transducer 3 is arranged on this plane.
The sensor module and signal conditioning and transport module are encapsulated in the machine box; The sensor module also comprises temperature sensor; Be provided with amplifier chip and singlechip chip in above-mentioned signal conditioning and the transport module, above-mentioned transmitter module adopts the ZigBee wireless transport module.Above-mentioned signal receiving device is hand-held receiver or repeater station receptor, and this device also comprises the battery detection chip.
The principle of work of above-mentioned parts is; Sensor assembly records the temperature stress variation to be caused the faint deformation of rail and exports a correspondent voltage signal; After signal conditioning and transport module receive the voltage signal of sensor assembly output; Voltage signal is amplified and handles, and stored signal data regularly radios to repeater station through transmitter module again.
Above-mentioned sensor assembly is on bloom 2, to be pasted with full-bridge type strain-ga(u)ge transducer 3; Consider that temperature stress changes the infinitesimal deformation of the bloom 2 that causes; And causing the decline of strain measurement precision, thin slightly narrow slightly design in the middle of the design of bloom is adopted is shown in accompanying drawing 1.Strain-gauge is selected the high full-bridge type strain-ga(u)ge transducer 3 of reaction sensitivity for use, shown in accompanying drawing 2.Because metal its resistance when mechanically deform (elongating or shortening) takes place can change, to a long metal filament for L, sectional area S, resistance coefficient ρ, its resistance R:
R＝ρL/S
When it elongated or shortened, length L, sectional area S and resistance coefficient ρ all can change, and when resistance change is Δ R, then strain stress is:
ε＝(ΔR/R)/K
K is the sensitivity coefficient of resistance strain gage.
Two groups of strain-gaugies of the full-bridge type strain-ga(u)ge transducer of pasting along rail 1 bearing of trend 3, two every group, vertical respectively and parallel steel rails direction, promptly a full-bridge type strain-ga(u)ge transducer 3 comprises four strain-gaugies, and is as shown in Figure 3.When rail temperature changed, rail 1 material was regarded as isotropy, makes R
1/ R
2=R
3/ R
4, because of sleeper can produce rail that resistance promptly form rail 1 to stress σ to the elongation of rail 1, this stress can make rail 1 produce strain stress=σ/E along the direction that rail 1 extends, and " worker " font bloom 2 centre portions produce same strain stress:
When full-bridge type strain-gauge input voltage is V
0The time, then bridge is pressed V
iFor:
V
i＝[R
1/(R
1+R
2)-R
3/(R
3+R
4)]V
0
When bloom 2 receives loading, press the changes delta Vi of Vi then can confirm the changes delta R that the resistance value of R takes place through measuring bridge, then record bloom 2 strain stress, can get its stress σ according to stress-strain relation and do
ε＝ΔV
iR
2(R
3+R
4)/(V
0?R
4)
σ＝Eε
Above-mentioned bloom 2 sticks with glue on rail 1, and the one side of middle part cutting is towards rail 1.The temperature stress that is parallel to rail 1 direction changes the distortion cause bloom 2 small; Full-bridge type strain-ga(u)ge transducer 3 can react the dependent variable of bloom 2; The temperature sensor of pasting on the bloom 2, monitoring of environmental temperature, but the variation of actv. verification rail 1 internal temperature stress.
Above-mentioned signal conditioning and transmitter module, the voltage signal that adopts high precision low noise low-power consumption amplifier chip amplification sensor module to export; Said signal conditioning and transmitter module adopt the singlechip chip of low-power consumption to gather the voltage signal of amplifier output, stored signal data.For energy-conservation, power supply can keep longer period of service, whenever starts working singlechip chip image data and storage at a distance from short time power supply.The long time of every interval one, give reception repeater station or hand held receiver with data transmission through the ZigBee wireless transport module.When steep variation appears in stress, no longer regularly transmit and adopt the instant alarming mode to start transmission by setting cycle.Power supply also adopts battery electric quantity chip monitoring monitoring battery electric quantity, when battery electric quantity will exhaust, sends the electric weight alerting signal.
Sensor assembly and signal conditioning and transmitter module all are encapsulated in the machine box, the convenient installation, and can not be damaged by preventive device.
The practical implementation method of this device may further comprise the steps:
(1) full-bridge type strain-ga(u)ge transducer 3 is sticked on the bloom 2 according to set mode, pass through solidified glue behind the HTHP again, or full-bridge type strain-ga(u)ge transducer 3 is welded on the bloom 2; Temperature sensor also sticks on the bloom 2.
(2) the machine box is sticked on the bloom 2, signal conditioning and transport module are installed in the machine box, constitute sensor device.
(3) sensor device is sticked on rail 1 web of the rail place again.
(4) install repeater station, the monitoring device of the utility model can be installed at rail 1 networked multiple spot, carry out the multiple spot monitoring.
Embodiment two
As shown in Figure 5; A kind of Railroad's Temperature Stress monitoring device, the full-bridge type strain-ga(u)ge transducer 3 of present embodiment is two, bloom 2 be shaped as " worker " font; The front of above-mentioned bloom 2 is the plane, and wherein a full-bridge type strain-ga(u)ge transducer 3 is arranged on this plane; The back side at bloom 2 middle parts makes it attenuation through after cutting, and another piece strain-ga(u)ge transducer 3 is installed in through on this one side after the cutting, and the annexation of other parts is identical with embodiment one, so no longer be repeated in this description.
Full-bridge type strain-ga(u)ge transducer 3 usefulness glue specials stick on the both sides perpendicular to bloom 2 middle parts of rail web direction, then adopt high-temperature technology with glue curing, or full-bridge type strain-ga(u)ge transducer 3 is welded on the bloom 2.The temperature stress of above-mentioned rail 1 changes the distorted deformation that causes bloom 2 small, and bloom 2 is parallel to rail 1 direction and simultaneously stretches, the another side compression.The aviation value of the dependent variable of two full-bridge type strain-ga(u)ge transducers 3 is just for being parallel to the dependent variable of rail 1 direction, the deformation quantity of the rail 1 that more real temperature of reaction STRESS VARIATION causes.
In sum, just can realize the utility model preferably.
Claims (10)
1. a Railroad's Temperature Stress monitoring device comprises sensor assembly, signal conditioning and transport module, transmitter module, receiving device; The sensor assembly of output voltage signal; The signal conditioning and the transport module of reception and processes voltage signal; Signal conditioning is communicated by letter with receiving device through transmitter module with transport module; It is characterized in that: said sensor assembly comprises bloom (2) and is arranged on the strain-ga(u)ge transducer on the bloom (2) that said strain-ga(u)ge transducer is full-bridge type strain-ga(u)ge transducer (3).
2. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said bloom (2) be shaped as " worker " font, the thickness at bloom (2) middle part is thinner than the upper and lower, the width at said bloom (2) middle part is narrower than the upper and lower.
3. Railroad's Temperature Stress monitoring device according to claim 2 is characterized in that: said full-bridge type strain-ga(u)ge transducer (3) is one.
4. Railroad's Temperature Stress monitoring device according to claim 2 is characterized in that: said full-bridge type strain-ga(u)ge transducer (3) is two.
5. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said sensor assembly, signal conditioning and transport module all are encapsulated in the machine box.
6. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said sensor assembly also comprises temperature sensor.
7. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: be provided with amplifier chip and singlechip chip in said signal conditioning and the transport module.
8. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said transmitter module adopts wireless transport module.
9. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said receiving device is hand-held receiver or repeater station receptor.
10. Railroad's Temperature Stress monitoring device according to claim 1 is characterized in that: said Railroad's Temperature Stress monitoring device also comprises the battery detection chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120140230XU CN202106991U (en) | 2011-05-05 | 2011-05-05 | Steel rail temperature stress monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120140230XU CN202106991U (en) | 2011-05-05 | 2011-05-05 | Steel rail temperature stress monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202106991U true CN202106991U (en) | 2012-01-11 |
Family
ID=45432438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120140230XU Expired - Fee Related CN202106991U (en) | 2011-05-05 | 2011-05-05 | Steel rail temperature stress monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202106991U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721501A (en) * | 2012-06-15 | 2012-10-10 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN102877385A (en) * | 2012-10-16 | 2013-01-16 | 哈尔滨安通测控技术开发有限公司 | Measurement device and measurement method of jointless track steel rail zero-stress rail temperature |
| CN104176091A (en) * | 2014-08-28 | 2014-12-03 | 华东交通大学 | Real-time continuous welded rail temperature and temperature stress monitoring system |
| WO2016030768A3 (en) * | 2014-08-26 | 2016-04-28 | 4Iiii Innovations Inc. | Adhesively coupled power-meter for measurement of force, torque, and power and associated methods |
| CN105675056A (en) * | 2016-02-22 | 2016-06-15 | 东南大学 | Long-span bridge damage recognition method |
| CN105758463A (en) * | 2016-04-15 | 2016-07-13 | 山西科为感控技术有限公司 | Continuous welded rail track temperature stress detecting system |
| CN106124566A (en) * | 2016-06-20 | 2016-11-16 | 南京航空航天大学 | The damage of rail joint clamping plate fatigue crack and extension on-line monitoring assembly and method of work thereof |
| CN106813644A (en) * | 2016-12-28 | 2017-06-09 | 上海施威重工成套有限公司 | Large-scale steel structure body processes deformation intelligent monitoring method |
| CN106885509A (en) * | 2017-04-10 | 2017-06-23 | 广西交通科学研究院有限公司 | Consider the strain detection testing device of temperature influence |
| CN111637991A (en) * | 2020-06-09 | 2020-09-08 | 石家庄铁道大学 | Steel rail temperature stress detection method and terminal equipment |
-
2011
- 2011-05-05 CN CN201120140230XU patent/CN202106991U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721501B (en) * | 2012-06-15 | 2014-04-02 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN102721501A (en) * | 2012-06-15 | 2012-10-10 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN102877385A (en) * | 2012-10-16 | 2013-01-16 | 哈尔滨安通测控技术开发有限公司 | Measurement device and measurement method of jointless track steel rail zero-stress rail temperature |
| CN102877385B (en) * | 2012-10-16 | 2015-04-22 | 哈尔滨安通测控技术开发有限公司 | Measurement method of jointless track steel rail zero-stress rail temperature of a measurement device |
| US10060738B2 (en) | 2014-08-26 | 2018-08-28 | 4Iiii Innovations Inc. | Adhesively coupled power-meter for measurement of force, torque, and power and associated methods |
| WO2016030768A3 (en) * | 2014-08-26 | 2016-04-28 | 4Iiii Innovations Inc. | Adhesively coupled power-meter for measurement of force, torque, and power and associated methods |
| CN104176091A (en) * | 2014-08-28 | 2014-12-03 | 华东交通大学 | Real-time continuous welded rail temperature and temperature stress monitoring system |
| CN105675056A (en) * | 2016-02-22 | 2016-06-15 | 东南大学 | Long-span bridge damage recognition method |
| CN105758463A (en) * | 2016-04-15 | 2016-07-13 | 山西科为感控技术有限公司 | Continuous welded rail track temperature stress detecting system |
| CN105758463B (en) * | 2016-04-15 | 2018-11-20 | 山西科为感控技术有限公司 | Welded rail temperature stress mornitoring system |
| CN106124566A (en) * | 2016-06-20 | 2016-11-16 | 南京航空航天大学 | The damage of rail joint clamping plate fatigue crack and extension on-line monitoring assembly and method of work thereof |
| CN106813644A (en) * | 2016-12-28 | 2017-06-09 | 上海施威重工成套有限公司 | Large-scale steel structure body processes deformation intelligent monitoring method |
| CN106885509A (en) * | 2017-04-10 | 2017-06-23 | 广西交通科学研究院有限公司 | Consider the strain detection testing device of temperature influence |
| CN111637991A (en) * | 2020-06-09 | 2020-09-08 | 石家庄铁道大学 | Steel rail temperature stress detection method and terminal equipment |
| CN111637991B (en) * | 2020-06-09 | 2022-05-31 | 石家庄铁道大学 | Steel rail temperature stress detection method and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20140505 |