CN104330163A - Novel steel rail thermometer - Google Patents
Novel steel rail thermometer Download PDFInfo
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- CN104330163A CN104330163A CN201410624485.1A CN201410624485A CN104330163A CN 104330163 A CN104330163 A CN 104330163A CN 201410624485 A CN201410624485 A CN 201410624485A CN 104330163 A CN104330163 A CN 104330163A
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- steel rail
- novel steel
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- circuit board
- heat conduction
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Abstract
The invention discloses a novel steel rail thermometer. The novel steel rail thermometer comprises a hand-held device terminal and a temperature measurement terminal which are connected by use of a communication cable, wherein the hand-held device terminal comprises an OLDE display screen arranged in an electronic chamber, a thin-film key panel and a power supply battery; the power supply battery is fixed inside the electronic chamber to supply power for the OLDE display screen and a single-chip electronic circuit; the single-chip electronic circuit receives the input signal of the thin-film key panel and controls the electronic display screen to display the input signal, and the single-chip electronic circuit is in communication connection with the temperature measurement terminal by use of the communication cable; the temperature measurement terminal comprises a metal shell formed by an outer shell and an inner shell nested into the outer shell, an annular magnet nested between the inner shell and the outer shell, a circuit board fixed on the inner shell, and an infrared thermometer welded on the circuit board and facing the open end of the metal shell; the open end of the metal shell is sealed by a heat-conducting silver piece. The novel steel rail thermometer is light and secure in structure, convenient to operate, good in protective properties, high in accuracy and high in temperature measurement response speed.
Description
Technical field
The present invention relates to a kind of Novel steel rail thermo detector, belong to circuit engineering field.
Background technology
Rail thermo detector is special test equipment railway being measured Rail Surface temperature.Be no matter laying construction and the maintenance of circuit, still switch tracks operation, and " three prevent " of works department (anti-swollen, anti-breaking, heatstroke prevention) must take all rail temperature as Main Basis.Along with the high speed development of modernized railway, also more and more higher to the requirement of circuit.Therefore, for the requirement of the aspect such as accuracy and stability of rail thermo detector, higher standard has also correspondingly been had.
The rail thermo detector used on the line at present, there are dual metal type rail thermo detector and analog signal figure formula rail thermo detector two kinds, and analog signal figure formula rail thermo detector has the advantages such as the directly perceived and antijamming capability of fast response time, reading is strong because of it, uses the most extensive.
Current, analog signal figure formula rail thermo detector adopts DS18B20 temperature sensor to sample to temperature usually, is controlled the display of sensor and temperature data by single-chip microcomputer and peripheral circuit.Owing to being solidificated within metal shell by temperature sensor, between tested Rail Surface and temperature sensor, heat balance time is usually at more than 120s, and during test fee, testing efficiency is low.
Summary of the invention
The object of the invention is, according to above-mentioned the deficiencies in the prior art part, a kind of Novel steel rail thermo detector to be provided, to shorten heat balance time between tested Rail Surface and temperature sensor, under solving high precision measuring temperature condition, measure problem consuming time.
The present invention seeks to have been come by following technical scheme:
A kind of Novel steel rail thermo detector, is characterized in that, comprises handheld device end and temperature survey end two parts composition, is connected therebetween by telecommunication cable;
Described handheld device end comprises the OLDE display screen, thin-film key panel, the supplying cell that are arranged in an electronics storehouse box, wherein said OLED display screen and thin-film key panel are fixed on electronics storehouse box inside surface, supplying cell is fixed on box inside, electronics storehouse powers for OLDE display screen and single-chip microcomputer electronic circuit board, single-chip microcomputer electronic circuit board accepts input signal, the control electronic display screen displays of thin-film key panel, and is connected with temperature survey end communication by telecommunication cable;
Temperature survey end comprises and is set with the metal shell formed, nested ring-shaped magnet between the inner hull and the outer hull by shell body and inner housing, is fixed on circuit board on inner housing and welding on circuit boards and towards the infrared thermometer of metal shell openend, metal shell openend is closed by heat conduction silver strip.
Inner housing, clamp the heat insulating washer of an annular between ring-shaped magnet and heat conduction silver strip, the annular space of heat insulating washer and inner housing are formed through, make infrared thermometer and heat conduction silver strip is separated by a distance is oppositely arranged.
The infrared receiver of infrared thermometer is facing to heat conduction silver strip.
The single-chip microcomputer electronic circuit board that the temperature value that infrared thermometer records is transferred in handheld device end through communication cable by circuit board carries out signal transacting.
Described inner housing is the sleeve of a hollow, and inwall is arranged one for the step of mounting circuit boards, the infrared thermometer that circuit board is installed is contained in the hollow space of sleeve.
Described handheld device end thin-film key panel is provided with start, shutdown, backlight three buttons, and wherein backlight key is for controlling lighting of OLED display screen backlight.The closedown of OLED display screen backlight can be controlled by backlight key, also can be realized when automatically closing after a delay time after lighting by program in single-chip microcomputer electronic circuit board.
Described temperature survey end realizes seal protection by shell body and heat conduction silver strip; heat conduction silver strip and Rail Surface are fitted; reach thermal equilibrium by contacting heat trnasfer between rail temperature with heat conduction silver strip, infrared thermometer directly measures the temperature of heat conduction silver strip to reflect the temperature of Rail Surface.
Described temperature survey end is adsorbed on Rail Surface by ring-shaped magnet, realizes fitting tightly of heat conduction silver strip and Rail Surface.Heat conduction silver strip and have a heat insulating washer between ring-shaped magnet and inner housing, reduce thermometrically end to the impact of Rail Surface local temperature, and the Rapid Thermal realizing heat conduction silver strip and Rail Surface balances.
The beneficial effect that the present invention reaches:
The present invention is made up of handheld device end and temperature survey end two parts, and handheld device end possesses start, shutdown and backlight presentation control function, and is shown in real time by measured temperature value; Temperature survey end carries out temperature sensing by high precision infrared temperature sensor, and carries out seal protection by heat conduction silver strip, makes this Novel steel rail thermo detector light structure firm, easy to operate, the advantages such as protective is good, and precision is high, thermometric fast response time.
The present invention compared with prior art has following advantages:
1, the present invention utilizes infrared thermometer as temperature acquisition element, realizes the untouchable thermometric of infrared thermometer and heat conduction silver strip, fast response time.
2, the present invention adopts heat conduction silver strip to carry out encapsulation process, water proof and dust proof to infrared thermometer temperature-sensitive face, prevents infrared environmental air-flow from changing the measurements interference introduced.
3, the present invention carrys out the temperature of indirect inspection rail by the temperature measuring heat conduction silver strip, and the heat conduction silver strip thickness adopted is thin, shortens the heat balance time between heat conduction silver strip and rail greatly, improves thermometric response speed.
4, heat conduction silver strip of the present invention and have a heat insulating washer between ring-shaped magnet and inner housing, reduces thermometrically end to the impact of Rail Surface local temperature, and reduces the heat balance time of heat conduction silver strip and Rail Surface.
By using ring-shaped magnet to replace traditional cylindrical magnetic iron in the heat conduction silver strip face of 5, infrared thermometer of the present invention, strengthen the suction of magnet, thus make the absorption affinity between heat conduction silver strip and rail stronger, temperature-sensitive face is more closely connected, temperature field evenly, thermometric more rapidly, more accurate.
Accompanying drawing explanation
Fig. 1 is Novel steel rail thermo detector pictorial diagram.
Fig. 2 is temperature survey end inner structure schematic diagram.
Fig. 3 is that temperature survey end is adsorbed in Rail Surface schematic diagram.
Fig. 4 is Novel steel rail thermo detector fundamental diagram.
Fig. 5 is Novel steel rail thermo detector precision and temperature range relation.
Fig. 6 is Novel steel rail thermo detector main control unit circuit theory diagrams.
Fig. 7 is Novel steel rail thermo detector Energy control schematic diagram.
Fig. 8 is Novel steel rail thermo detector performance index.
In figure, handheld device end 1, temperature survey end 2, communication cable 3, starting key 4, shutdown button 5, backlight key 6, OLED display screen 7, circuit board 8, inner housing 9, ring-shaped magnet 10, heat insulating washer 11, heat conduction silver strip 12, shell body 13, infrared thermometer 14, rail 15.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, handheld device end 1 and temperature survey end 2 form this Novel steel rail thermo detector by communication cable 3.Handheld device end 1 realizes start and the shutdown of equipment by starting key 4 and shutdown button 5, shows measured temperature value, press backlight key 6, OLDE display backlight lamp bright by OLED display screen 7.
As shown in Figure 2, the infrared thermometer 14 of temperature survey end is welded on circuit board 8, and then be fixed on the interior step of inner housing 9, the infrared receiver of infrared thermometer 14 is facing to heat conduction silver strip 12, the single-chip microcomputer that the temperature value recorded is transferred in handheld device end 1 by the communication cable 3 be electrically connected with circuit board 8 carries out signal transacting and display, the heat insulating washer 11 of annular is had between heat conduction silver strip 12 and inner housing 9 and ring-shaped magnet 10, the thermal loss of isolated heat conduction silver strip 12, ring-shaped magnet 10 is nested between inner housing 9 and shell body 13, for temperature survey end 2 is adsorbed in rail surface.
When the present invention uses, press the starting key 4 of handheld device end 1, open rail thermo detector.During test, as shown in Figure 3, first the dirts such as the iron rust on rail 15 surface to be measured are removed, the one side of heat conduction silver strip 12 on temperature survey end 2 is adjacent to rail 15 surface, temperature survey end 2 is adsorbed on rail 15 surface by ring-shaped magnet 10, treat that the temperature value that the OLDE display screen 7 on handheld device end 1 shows is stablized, the temperature of rail 15 can be recorded.In test process, press the backlight key 6 on handheld device end 1, OLED display screen backlight is bright, and after 15s, backlight is closed automatically.Test terminates, and presses the shutdown button 5 of handheld device end 1, and rail thermo detector cuts out.
In the present embodiment, as shown in Figure 4, lithium battery is that whole measuring system is powered to hardware circuit principle of work block diagram, carries out after voltage transformation through power module, power to respectively infrared thermometer, microcontroller, OLED display module, the break-make that energy supply control module is powered for controlling power module.
In the present embodiment, infrared thermometer 14 adopts Non-contact Infrared Temperature Measurement device MLX90614, its inner employing low noise amplifier, 17 A/D converters and powerful DSP processing unit, have higher temperature resolution and measuring accuracy, have SMBUS and PWM two kinds of communication modes.The temperature-measuring range of MLX90614 is-40 DEG C ~+125 DEG C, temperature resolution is 0.02 DEG C, when normal temperature scope, the absolute precision measured is ± 0.2 DEG C, has the absolute precision of maximum ± 1 DEG C, and consider that the temperature difference between actual application environment and rail is no more than 20 degree usually within the scope of-40 DEG C ~+70 DEG C, after employing heat conduction silver strip 12 is as sealing and temperature sensor structure, temperature measurement accuracy can be more stable, be less than ± 0.5 DEG C, as a-quadrant in accompanying drawing 5.The measuring accuracy of Non-contact Infrared Temperature Measurement device MLX90614 directly determines the temperature measurement accuracy of whole system, can meet the parameter request for thermometric as shown in Figure 8 in this programme completely.
In the present embodiment, heat conduction silver strip 12 adopts the thick silver strip of 0.5mm, ensures intensity and the heat conduction rapidity of heat conduction silver strip; Handheld device end adopts C8051F410 single-chip microcomputer as control module, adopts OLED display screen, and adopt water proof and dust proof design, system power dissipation is less than 20mA.
The present embodiment in the specific implementation, adopts lithium battery power supply.Lithium battery has that capacity is large, memory-less effect, cost performance high, therefore, select lithium battery in this example, and be equipped with one piece of lithium battery and change, single lithium battery is 1900mAh3.7V, the stream time in actual use of rail thermo detector can reach more than 60 hours, as shown in Figure 8.
Hardware circuit design adopts mature technology scheme, is briefly described below in conjunction with accompanying drawing 6 and 7 pairs of hardware circuits.Single-chip microcomputer N1 adopts C8051F410 as control module, controls the data display of OLED display screen, is read the measurement test value signal of infrared thermometer input, by the programming of P1 Interface realization to Single Chip Microcomputer (SCM) program by serial communication interface CON2.To be backlight key 6, S2 be button S1 that starting key 4, S3 is shutdown button 5.When pressing backlight key S1, Light signal becomes low level from high level, and single-chip microcomputer N1 detects that level signal changes, and controls OLED display screen backlight bright.In accompanying drawing 7, diode VD1, diode VD2, triode V3, triode V4, resistance R20, R21, R23, R25, S2, S3, stabilivolt V5, lithium battery BT1 constitute switching on and shutting down control circuit jointly; V1 is electric pressure converter, and for subsequent conditioning circuit work provides stable operating voltage, electric capacity C2 and C6 is denoising electric capacity.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. a Novel steel rail thermo detector, is characterized in that, comprises handheld device end and temperature survey end two parts composition, is connected therebetween by telecommunication cable;
Described handheld device end comprises the OLDE display screen, thin-film key panel, the supplying cell that are arranged in an electronics storehouse box, wherein said OLED display screen and thin-film key panel are fixed on electronics storehouse box inside surface, supplying cell is fixed on box inside, electronics storehouse powers for OLDE display screen and single-chip microcomputer electronic circuit board, single-chip microcomputer electronic circuit board accepts input signal, the control electronic display screen displays of thin-film key panel, and is connected with temperature survey end communication by telecommunication cable;
Temperature survey end comprises and is set with the metal shell formed, nested ring-shaped magnet between the inner hull and the outer hull by shell body and inner housing, is fixed on circuit board on inner housing and welding on circuit boards and towards the infrared thermometer of metal shell openend, metal shell openend is closed by heat conduction silver strip.
2. Novel steel rail thermo detector according to claim 1, it is characterized in that, inner housing, clamp the heat insulating washer of an annular between ring-shaped magnet and heat conduction silver strip, the annular space of heat insulating washer and inner housing are formed through, make infrared thermometer and heat conduction silver strip is separated by a distance is oppositely arranged.
3. Novel steel rail thermo detector according to claim 1 and 2, is characterized in that, the infrared receiver of infrared thermometer is facing to heat conduction silver strip.
4. Novel steel rail thermo detector according to claim 1, is characterized in that, the single-chip microcomputer electronic circuit board that the temperature value that infrared thermometer records is transferred in handheld device end through communication cable by circuit board carries out signal transacting.
5. Novel steel rail thermo detector according to claim 1, is characterized in that, described inner housing is the sleeve of a hollow, and inwall is arranged one for the step of mounting circuit boards, the infrared thermometer that circuit board is installed is contained in the hollow space of sleeve.
6. Novel steel rail thermo detector according to claim 1, is characterized in that, described handheld device end thin-film key panel is provided with start, shutdown, backlight three buttons, and wherein backlight key is for controlling lighting of OLED display screen backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410624485.1A CN104330163B (en) | 2014-11-07 | 2014-11-07 | Novel steel rail thermo detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410624485.1A CN104330163B (en) | 2014-11-07 | 2014-11-07 | Novel steel rail thermo detector |
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| Publication Number | Publication Date |
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| CN104330163A true CN104330163A (en) | 2015-02-04 |
| CN104330163B CN104330163B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410624485.1A Active CN104330163B (en) | 2014-11-07 | 2014-11-07 | Novel steel rail thermo detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345095A (en) * | 2020-11-16 | 2021-02-09 | 山西世恒铁路技术有限公司 | Portable steel rail thermometer and temperature measuring system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345095A (en) * | 2020-11-16 | 2021-02-09 | 山西世恒铁路技术有限公司 | Portable steel rail thermometer and temperature measuring system thereof |
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| Publication number | Publication date |
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| CN104330163B (en) | 2018-05-04 |
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Effective date of registration: 20180813 Address after: 233030 2016 Tang He road, Bengbu, Anhui Patentee after: Huadong Photoelectric Integrated Device Research Institute Address before: 215163 No. 89 Longshan Road, hi tech Zone, Suzhou, Jiangsu Patentee before: China North Industries Group Corporation No.214 Research Institute Suzhou R&D Center |