CN114572271B - Sunlight interference resistance temperature measurement device and method based on railway infrared shaft temperature detection - Google Patents
Sunlight interference resistance temperature measurement device and method based on railway infrared shaft temperature detection Download PDFInfo
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- CN114572271B CN114572271B CN202210137695.2A CN202210137695A CN114572271B CN 114572271 B CN114572271 B CN 114572271B CN 202210137695 A CN202210137695 A CN 202210137695A CN 114572271 B CN114572271 B CN 114572271B
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- 238000001514 detection method Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 36
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 230000006855 networking Effects 0.000 claims abstract description 32
- 230000005855 radiation Effects 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
- B61K9/06—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault by detecting or indicating heat radiation from overheated axles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
Abstract
The invention discloses a sunlight interference resistance temperature measurement device and method based on railway infrared axle temperature detection, and belongs to the field of railway safety monitoring. The sunlight interference resistant temperature measuring device comprises a photon probe, an upper computer and a networking center, wherein the photon probe comprises a probe shell, an infrared detection window, a light intensity detection window, an optical system, a light intensity sensor, a photon sensor and a signal processing module. The infrared radiation and visible light filtered by the optical system are respectively transmitted to the photon sensor and the light intensity sensor, photoelectric conversion is respectively carried out on the two sensors, and a detection voltage signal and a light intensity voltage signal are output; the upper computer performs equivalent conversion on the light intensity voltage, draws the converted equivalent voltage and the detection voltage according to the same time axis, judges whether sunlight interference exists, and simultaneously transmits data to a networking center to make accurate hotbox forecast. The device is simple, has high reliability, and can quickly, effectively and accurately identify sunlight interference signals.
Description
Technical Field
The invention belongs to the field of railway safety monitoring, and particularly relates to a sunlight interference resistance temperature measuring device and method based on railway infrared shaft temperature detection.
Background
In the intelligent detection application of infrared axle temperature in the railway safety monitoring field, the axle box running on the train can radiate infrared light in different wave bands due to running heating. When the train runs to certain places, moments or conditions, the direct sunlight or the sunlight radiation reflected by a train body, a building and the like can possibly enter the infrared sensor of the infrared shaft temperature detection system through a certain angle, and the signal output of the infrared shaft temperature sensor is influenced, so that the false alarm of hotbox is caused.
The intelligent detection of the infrared shaft temperature is difficult to identify the sunlight interference, and particularly the infrared shaft temperature detection system adopting the photon detector is difficult. In practical application, software waveform intelligent recognition is mainly adopted, and false alarms caused by sunlight interference are processed in a manual rechecking mode, but the mode has the defects of low recognition rate, difficulty in recognition, labor and time consumption and the like, and has a great influence on normal prediction hotbox.
Disclosure of Invention
The invention provides a sunlight interference resistance temperature measuring device and method based on railway infrared shaft temperature detection, which aim to solve the problem that a railway vehicle infrared detection system is affected by sunlight interference to normally detect and realize reliable, effective and accurate detection.
The sunlight interference resistance temperature measuring device based on the infrared axle temperature detection of the railway comprises: the photon probe, the upper computer and the networking center; the photon probe is positioned on the outer side wall of the rail and is sequentially connected with the upper computer and the networking center through cables.
The photon probe comprises a probe shell, an infrared detection window, a light intensity detection window, an optical system, a light intensity sensor, a photon sensor and a signal processing module;
the probe shell is cuboid, two through holes are formed in the upper surface of the probe shell and serve as an infrared detection window and a light intensity detection window respectively, the through holes of the infrared detection window are located in the center of the upper surface of the shell, and the through holes of the light intensity detection window are adjacent to the through holes of the infrared detection window.
An optical system, a light intensity sensor, a photon sensor and a signal processing module are fixed in the probe shell; the optical system is arranged on the inner wall of the upper surface of the shell, is opposite to the infrared detection window and the light intensity detection window and is used for receiving radiation signals passing through the infrared detection window and the light intensity detection window; the optical system is respectively connected with one ends of the light intensity sensor and the photon sensor, and the other ends of the light intensity sensor and the photon sensor are respectively connected with the signal processing module.
The optical system adopts a single double-view optical system or two single-view optical systems, preferably two single-view optical systems; the center of the detection view field of the photon sensor and the light intensity sensor are coincident.
The working principle of the sunlight interference resistance temperature measuring device based on the infrared axle temperature detection of the railway is as follows:
in the detection state, infrared radiation and visible light of the train axle box enter an optical system through an infrared detection window and a light intensity detection window respectively;
then, the optical system filters out the radiation of the irrelevant wave band, and respectively converges the infrared radiation energy and the visible light energy to the photon sensor and the light intensity sensor.
And then, the photon sensor and the light intensity sensor generate photoelectric effect to generate two voltage signals, and the two voltage signals are respectively processed by the signal processing module and then output to the upper computer.
And finally, the upper computer carries out voltage correction, waveform drawing and analysis judgment on the two voltage signals, sends analysis data to a networking center, and synthesizes various data by the networking center to judge so as to ensure accurate forecast of hotbox.
The sunlight interference resistance temperature measurement method based on the railway infrared shaft temperature detection comprises the following specific steps:
step one, initially, a railway infrared axle temperature detection system is in a interception state, and when a train is detected to pass through, a photon probe is started.
Step two, the red of the axle box of the trainExternal radiation and sunlight interference in the environment are filtered by an optical system, enter a photon sensor and a light intensity sensor respectively for photoelectric conversion to obtain two output voltage signals, and the two output voltage signals are processed by a signal processing module respectively to output detection voltage V 1 And a light intensity voltage V 2 ；
The photon sensor receives the infrared radiation of the train part to be detected when passing through the train in real time and generates output voltage V through photoelectric conversion 1s After the signal processing module, the detection voltage V is obtained 1 。
The light intensity sensor receives the visible light radiation of the detection part when passing through the vehicle in real time, and the output voltage V is obtained through photoelectric conversion 2s The light intensity voltage V is obtained after the amplification processing circuit 2 。
Step three, the detection voltage V 1 And a light intensity voltage V 2 Respectively transmits the light intensity voltage V to the upper computer 2 Equivalent conversion to equivalent voltage V 3 Will detect the voltage V 1 And equivalent voltage V 3 Drawing in the same waveform according to the same time axis, and judging equivalent voltage V 3 If the light intensity is larger than the light intensity threshold K of sunlight interference, recording the time axis of the part to obtain an interference time period T1, and executing the fourth step; if not, the complete detection voltage signal V is reserved 1 And outputting the data to a networking center, and executing the step five.
Step four, the upper computer pairs V of the same time period according to the interference time period T1 1 Waveform passing V 3 And correcting, marking the sunlight interference on the shaft temperature data related to the waveform correction part signals, comprehensively judging by the upper computer according to the marking, primarily analyzing the heating condition of the bearing position, and transmitting to a networking center.
Step five, the networking center judges the received signal, if the complete detection voltage signal is received, normal detection and prediction are carried out; if the signals of the bearing heating condition are received, the networking center further analyzes the bearing heating condition and sends out accurate hot shaft forecast.
The invention has the advantages that:
(1) The sunlight interference resistance temperature measuring device based on the railway infrared shaft temperature detection has the advantages of simple structure, strong compatibility and high reliability, and can be directly compatible with the existing railway infrared shaft temperature detection system.
(2) A sunlight interference resistance temperature measurement method based on railway infrared axle temperature detection can rapidly, effectively and accurately identify sunlight interference signals, prevent false alarm and improve hot forecast redemption rate.
Drawings
FIG. 1 is a schematic diagram of a detection principle of a sunlight interference resistance temperature measurement device based on railway vehicle infrared detection;
FIG. 2 is a schematic diagram of the appearance of a photon probe of the anti-sunlight interference temperature measuring device based on infrared detection of a railway vehicle;
FIG. 3 is a schematic diagram of a photon probe structure of a sunlight interference resistant temperature measuring device based on infrared detection of a railway vehicle;
FIG. 4 is a flow chart of a method for measuring temperature of sunlight interference based on infrared detection of a railway vehicle.
In the drawing the view of the figure,
1-photon probe, 2-sunlight interference, 3-infrared radiation, 4-train axle box, 5-cable, 6-upper computer and 7-networking center;
the device comprises a 101-infrared detection window, a 102-light intensity detection window, a 103-probe shell, a 104-optical system, a 105-photon sensor, a 106-light intensity sensor and a 107-signal processing module.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.
According to the sunlight interference resistance temperature measuring device and method based on railway infrared shaft temperature detection, the light intensity sensor is added, the center of a detection view field is coincident with the center of a photon detector, and the same detection view field range as the photon detector can be obtained. The response wave band of the photon detector is an infrared wave band, is easily interfered by sunlight, and is difficult to obtain a real infrared signal. When sunlight is interfered to enter the field of view of the photon detector, sunlight also enters the field of view of the light intensity sensor, and the light intensity sensor can output a signal representing the light intensity, and can realize the distinction between visible light and infrared light by converting the signal into a voltage signal matched with the infrared signal.
The whole detection device is shown in fig. 1, and comprises: the system comprises a photon probe 1, a train axle box 4, a cable 5, an upper computer 6 and a networking center 7;
in the running process of the train, the infrared radiation energy of the train axle box 4 is increased due to the temperature rise, and the infrared radiation 3 enters the field of view of the photon probe 1; meanwhile, the sunlight interference 2 can directly enter or refract into the field of view of the photon probe 1 under the influence of factors such as vehicle type, latitude and the like, and in some cases, can also enter the field of view of the photon probe 1 by being reflected by other nearby objects. After entering the photon probe 1, the infrared radiation 3 and the sunlight interference 2 respectively output two voltage signals, the signals are transmitted to the upper computer 6 through the cable 5, the software of the upper computer 6 corrects the voltage and the waveform of the two signals, the corrected data are output to the networking center 7, and finally the networking center 7 carries out comprehensive forecasting.
The sunlight interference 2 is mainly sunlight entering the field of view of the photon probe in various ways in nature, and also comprises a small number of strong lights similar to sunlight, such as the lights of searchlight, car lights and the like.
The infrared radiation 3 mainly refers to electromagnetic wave radiation having a wavelength of 2 μm or more.
The train axle box 4 is a main detection target of the infrared axle temperature detection system, and generates operation heat during operation.
The cable 5 is the main part of the control connection and signal transmission of the photon probe and the upper computer.
The upper computer 6 is usually located in a detection station beside a track and is used for receiving detection data, calculating the temperature of a detection target, uploading data and the like, and after receiving the data of the two sensors sent by the photon probe, the data need to be converted, calculated and corrected, so that the influence of sunlight interference is eliminated as much as possible, and relatively real infrared detection data are obtained. And finally uploading the corrected data to a networking center.
The networking center 7 receives data sent by the upper computer of the detection station, and can comprehensively judge and forecast the heating condition of the current passing hot axle according to the information of the data and the data information of other detection stations.
As shown in fig. 2 and 3, the photon probe 1 includes: an infrared detection window 101, a light intensity detection window 102, a probe housing 103, an optical system 104, a photon sensor 105, a light intensity sensor 106 and a signal processing module 107.
The probe housing 103 is the portion that carries and protects the relevant components of the probe. Infrared radiation 3 of the train axle box 4 and sunlight interference 2 in the environment enter an optical system 104 through an infrared detection window 101 and a light intensity detection window 102; the optical system 104 filters out radiation in non-relevant wavelength bands, focusing the infrared radiation energy and the solar energy onto the photon sensor 105 and the light intensity sensor 106, respectively. The infrared radiation energy and the sunlight energy are respectively converted into two voltage signals through photoelectric effect in the two sensors, and the two voltage signals are processed by the signal processing module 107 and then transmitted to the upper computer 6 through the cable 5. The upper computer 6 transmits the data after the processing correction to the networking center 7.
Preferably, the light intensity detection range of the light intensity sensor is 0-120000lx, and the light intensity state between the two states of no light and direct sunlight in noon in summer can be distinguished.
The preferred optical system employs two independent optical systems, the detection wavelength range being optically filtered according to the requirements of the detector.
The two optical systems of the photon sensor 105 and the light intensity sensor 102 make fine adjustments in a direction parallel to the train running direction. The center of the detection fields of view of the photon sensor 105 and the light intensity sensor 102 are made to coincide by adjustment.
The working principle of the sunlight interference resistance temperature measuring device based on the infrared axle temperature detection of the railway is as follows:
in the detection state, when the train axle box passes through, the generated infrared radiation enters the photon sensor through the optical system, and meanwhile, the visible light which is subjected to direct irradiation, refraction and reflection enters the light intensity sensor through the optical system.
Then, infrared radiation and visible light generate voltage signals by photoelectric effect in the two sensors respectivelyV 1s And V 2s Respectively transmitting the voltage signals to signal processing modules, wherein the signal processing modules respectively process the voltage signals V 1s And V 2s The amplification and filtering treatment are carried out to obtain two voltages V 1 And V 2 Voltage V 1 And V 2 And the data are respectively transmitted to an upper computer through cables.
And finally, after the upper computer collects the two voltages, waveform drawing and voltage correction are carried out, data are sent to a networking center, and the networking center synthesizes various data to judge, so that accurate forecast of hotbox is ensured.
As shown in fig. 4, a sunlight interference resistance temperature measurement method based on railway infrared axle temperature detection specifically comprises the following steps:
step one, initially, a railway infrared axle temperature detection system is in a interception state, and when a train is detected to pass through, a photon probe is started.
Step two, infrared radiation of the train axle box and sunlight interference in the environment are filtered by an optical system, and enter a photon sensor and a light intensity sensor respectively for photoelectric conversion, so that two output voltage signals are obtained;
the infrared radiation enters the photon sensor through the following treatment processes: the photon sensor receives the infrared radiation of the axle box of the train when passing through the train in real time and generates output voltage V through photoelectric conversion 1s 。
The processing procedure of sunlight interference entering the light intensity sensor is as follows: the light intensity sensor receives sunlight interference during passing the car in real time, and obtains output voltage V through photoelectric conversion 2s 。
Step three, the two output voltage signals are respectively input into a signal processing module for processing to obtain a detection voltage V 1 And a light intensity voltage V 2 Outputting to an upper computer;
fourth, the light intensity voltage V in the upper computer 2 Equivalent conversion to equivalent voltage V 3 Will detect the voltage V 1 And equivalent voltage V 3 Drawing in the same waveform according to the same time axis, and judging equivalent voltage V 3 Whether the light intensity is larger than a light intensity threshold K of sunlight interference or not, if so, recording the time axis of the part to obtainAn interference time period T1, executing a step five; if not, the complete detection voltage signal V is reserved 1 And outputting the data to a networking center, and executing the step six.
Light intensity voltage V in upper computer 2 The corresponding equivalent voltage value V is obtained through a light intensity conversion algorithm based on the number 3TE5-202104 3 。
Step five, the upper computer pairs V of the same time period according to the interference time period T1 1 Waveform passing V 3 And carrying out waveform correction, marking sunlight interference on the shaft temperature data related to the waveform correction part signals, comprehensively judging by the upper computer according to the marking, primarily analyzing the heating condition of the bearing position, and transmitting to a networking center.
And the upper computer performs preliminary analysis by combining various parameters of the environment and system parameters of the current detection station.
Step six, the networking center judges the received signals, and if the networking center receives the complete detection voltage signals, normal detection and prediction are carried out; if the signals of the bearing heating condition are received, the networking center further analyzes the bearing heating condition and makes comprehensive forecast.
The networking center receives data such as temperature measurement, marking information, correction information and the like of the upper computer, judges according to the data in combination with other information, analyzes the heating condition of the bearing position and comprehensively forecasts.
The invention uses the detecting function of the light intensity sensor to sunlight and the correction algorithm of the output of the light intensity sensor and the infrared signal, can reasonably correct the normal train axle temperature signal, well restores the infrared axle temperature detecting signal and temperature under the interference of sunlight, and can ensure the accuracy of hot axle forecast.
The present invention is directed to solving one or more of the above-described drawbacks and disadvantages, and the solution to any particular problem is not a limitation on the scope of the present disclosure or appended claims unless explicitly stated.
Claims (3)
1. Sunlight interference resistance temperature measuring device based on infrared axle temperature detection of railway, characterized by comprising: the photon probe, the upper computer and the networking center; the photon probe is positioned on the outer side wall of the rail and is sequentially connected with the upper computer and the networking center through cables;
the photon probe comprises a probe shell, an infrared detection window, a light intensity detection window, an optical system, a light intensity sensor, a photon sensor and a signal processing module;
the probe shell is cuboid, two through holes are formed in the upper surface of the probe shell and serve as an infrared detection window and a light intensity detection window respectively, the through holes of the infrared detection window are positioned in the center of the upper surface of the shell, and the through holes of the light intensity detection window are adjacent to the through holes of the infrared detection window;
an optical system, a light intensity sensor, a photon sensor and a signal processing module are fixed in the probe shell; the optical system is arranged on the inner wall of the upper surface of the shell, is opposite to the infrared detection window and the light intensity detection window and is used for receiving radiation signals passing through the infrared detection window and the light intensity detection window; the optical system is respectively connected with one ends of the light intensity sensor and the photon sensor, and the other ends of the light intensity sensor and the photon sensor are respectively connected with the signal processing module;
the optical system adopts a single double-view-field optical system or two single-view-field optical systems; the center of the detection view field of the photon sensor and the center of the detection view field of the light intensity sensor are coincident;
the working principle of the device is as follows:
in the detection state, infrared radiation and visible light of the train axle box enter an optical system through an infrared detection window and a light intensity detection window respectively;
then, the optical system filters out the radiation of the irrelevant wave band, and respectively converges the infrared radiation energy and the visible light energy to the photon sensor and the light intensity sensor;
then, the photon sensor and the light intensity sensor generate photoelectric effect to generate two voltage signals, and the two voltage signals are respectively processed by the signal processing module and then output to the upper computer;
and finally, the upper computer carries out voltage correction, waveform drawing and analysis judgment on the two voltage signals, sends analysis data to a networking center, and synthesizes various data by the networking center to judge so as to ensure accurate forecast of hotbox.
2. The sunlight interference resistant temperature measuring device based on infrared railway shaft temperature detection according to claim 1, wherein the optical system is preferably two monoscopic optical systems.
3. The sunlight interference resistance temperature measurement method based on the sunlight interference resistance temperature measurement device as claimed in claim 1, which is characterized by comprising the following specific steps:
step one, initially, a railway infrared axle temperature detection system is in a interception state, and when a train is detected to pass through, a photon probe is started;
step two, infrared radiation of the train axle box and sunlight interference in the environment are filtered by an optical system, respectively enter a photon sensor and a light intensity sensor to perform photoelectric conversion, obtain two output voltage signals, respectively process the two output voltage signals by a signal processing module, and output a detection voltage V 1 And a light intensity voltage V 2 ；
The photon sensor receives the infrared radiation of the train part to be detected when passing through the train in real time and generates output voltage V through photoelectric conversion 1s After the signal processing module, the detection voltage V is obtained 1 ；
The light intensity sensor receives the visible light radiation of the detection part when passing through the vehicle in real time, and the output voltage V is obtained through photoelectric conversion 2s The light intensity voltage V is obtained after the amplification processing circuit 2 ；
Step three, the detection voltage V 1 And a light intensity voltage V 2 Respectively transmits the light intensity voltage V to the upper computer 2 Equivalent conversion to equivalent voltage V 3 Will detect the voltage V 1 And equivalent voltage V 3 Drawing in the same waveform according to the same time axis, and judging equivalent voltage V 3 If the light intensity is larger than the light intensity threshold K of sunlight interference, recording the time axis of the part to obtain an interference time period T1, and executing the fourth step; if not, the complete detection electricity is reservedPressure V 1 Outputting the data to a networking center, and executing the fifth step;
step four, the upper computer pairs V of the same time period according to the interference time period T1 1 Waveform passing V 3 Correcting, marking sunlight interference on the shaft temperature data related to the waveform correction part signals, comprehensively judging by the upper computer according to the marking, primarily analyzing the heating condition of the bearing position, and transmitting to a networking center;
step five, the networking center judges the received signal, if the complete detection voltage signal is received, normal detection and prediction are carried out; if the signals of the bearing heating condition are received, the networking center further analyzes the bearing heating condition and sends out accurate hot shaft forecast.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6812466B2 (en) * | 2002-09-25 | 2004-11-02 | Prospects, Corp. | Infrared obstacle detection in the presence of sunlight |
| US7693673B2 (en) * | 2007-06-06 | 2010-04-06 | General Electric Company | Apparatus and method for identifying a defect and/or operating characteristic of a system |
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2022
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| JPH04169824A (en) * | 1990-11-02 | 1992-06-17 | Yotsugi Kk | Infrared sensor device |
| US6518561B1 (en) * | 1999-11-05 | 2003-02-11 | Sony Corporation | User detection circuit with environmental light detector |
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