Train Wheel Hub Infrared Temperature Detection System

Yoseen infrared is a company focusing on the R & D, production and sales of temperature - measuring infrared thermal camera. Our thermal cameras are widely used in human body temperature measurement, metallurgy, power system, security and other fields.

System introduction: 1. Project Background

China's railway development is very rapid, has become the largest railway country in Asia. The railway system is an important national transportation system, and its daily stable operation is related to the normal operation of national production and life. With the increase of railway passenger flow and running frequency, it is very important to detect the temperature of the catenary and hub of the train.

2. Project Overview

With the increase of train speed, the temperature of the hub will also rise correspondingly. When the temperature of the hub is above 40℃ higher than the ambient temperature, it must be replaced, otherwise it will damage the bearing strength and the performance of the brake pad, and there are hidden dangers. In a project in Dongguan, Guangdong Province, infrared thermal camera is required to detect the temperature of the bottom wheel hub of a moving train. It is required to measure the temperature accurately and the picture is free from shadow. If abnormal temperature is found, the railway staff should be warned in time and the safety risks should be removed through maintenance.

3. Infrared Thermal Device Installation and Selection

As the train is in a fast motion state, the infrared thermal camera needs to be fixed on the track, so high-speed infrared thermal camera needs to be used. For long-term outdoor use, protective cover shall be installed and germanium glass shall be equipped at the front end. According to the calculation of this project, 4mm infrared lens should be installed, the field Angle is 97°×71°, and the opening at the front end of the shield is 90mm. Considering that the track will be violently shaking when the train passes by, 100*8mm germanium sheet should be installed at the front end of the shield. Installation diagram is as follows:

4. System Characteristics

Adopting the infrared detection system of the train wheel hub, the temperature of the wheel hub can be detected in real time and the alarm signal can be sent according to the pre-set warning value, so that the watchman can take corresponding measures in time to ensure the safe operation of the train. It has the following advantages:

1) It does not affect the train transportation: the temperature measurement is non-contact and does not affect the normal operation of the train.

2) Alarm visualization: infrared thermal image is provided so that the personnel on duty can quickly locate the alarm position and deal with it.

3) Automatic warning: In the detection process, if abnormal temperature of the train wheel hub is found, it will automatically alarm. The alarm information includes text information and sound information, which will prompt the specific alarm position information of the train staff for troubleshooting.

4) High detection accuracy: The sampling accuracy of the infrared thermal imager adopted is higher than that of the portable instrument, which is convenient to timely judge the specific hot spots of the train wheel hub, thus gaining precious time for accurate judgment and taking corresponding measures.

5) Short thermal response time: the time constant is only 2ms, the imaging time is short, and the image has no drag.

The system has the advantages of high reliability and real-time performance: using this system, the natural environment will not have any impact, no matter wind and rain, or low temperature and high temperature can realize uninterrupted automatic monitoring.

1) It does not affect the train transportation: the temperature measurement is non-contact and does not affect the normal operation of the train.

2) Alarm visualization: infrared thermal image is provided so that the personnel on duty can quickly locate the alarm position and deal with it.

3) Automatic warning: In the detection process, if abnormal temperature of the train wheel hub is found, it will automatically alarm. The alarm information includes text information and sound information, which will prompt the specific alarm position information of the train staff for troubleshooting.

4) High detection accuracy: The sampling accuracy of the infrared thermal imager adopted is higher than that of the portable instrument, which is convenient to timely judge the specific hot spots of the train wheel hub, thus gaining precious time for accurate judgment and taking corresponding measures.

5) Short thermal response time: the time constant is only 2ms, the imaging time is short, and the image has no drag.

The system has the advantages of high reliability and real-time performance: using this system, the natural environment will not have any impact, no matter wind and rain, or low temperature and high temperature can realize uninterrupted automatic monitoring.

technical parameter

ON-LINE TEMPERATURE MEASURING THERMAL CAMERA

Yoseen X series thermal camera has accurate temperature measurement and excellent performance, and is suitable for various complex and harsh use environments. It is an infrared thermal camera series that can be selected for use scenarios with high requirements on the performance of infrared thermal camera.

Full-frame, high-speed accurate temp measurement
Has accurate temperature measurement and excellent performance
Professional software, data analysis and management

Matched with the unique calibration algorithm for temperature measurement and the user-friendly software
Suitable for various complex & harsh environments

No matter it is used alone or developed with secondary integration, it can meet the differentiated applications

Model	X640D	X384D	X160A
Infrared resolution	640*480	384*288	160*120
Pixel size	17um
Frame frequency	30Hz	50Hz
NETD	≤50mK@25℃
Wave band	8~14um
Field angle	See "Yoseen X-series Thermal Camera list" for Details
Angular resolution	See "Yoseen X-series Thermal Camera list" for Details
Temp range	-20～150℃，10～50℃，0～300℃(customizable)
Temp accuracy	±2℃ or ±2%, can be raised to ±0.4℃

Common Parameter

Imaging distance	About 20 focal lengths to infinity
Temp measuring template	High and low temp tracking, point/line/polygon temp tracking in template, set multiple shielding areas
Image enhancement	Adaptive drawing, manual enhancement, electronic zoom
Color palette	White hot, black hot, iron red, red saturated, user-defined and others
Focus Mode	Electric/manual, electric lens supports autofocus
Data
Single frame temp	PNG / BMP/ JPG image format with temperature information
Temp flow	Total radiant temperature information storage
Digital video	H.264, RTSP stream media protocol, MP4 files, HDMI output interface
Data storage	Support TF card expansion and storage, up to 32GB
Electrical interface
Power supply	DC9～15V, typical power consumption 2.5W@25℃
Analog video	NTSC/PAL compound video output
Ethernet	100/1000 Base, TCP, UDP, IP, DHCP, RTSP, ONVIF, etc.，provide SDK development kit
Serial port	RS485, support Pelco control protocol
Electric lens	12V power lens
GPIO	1 magnetic isolation input, 1 relay output
Environmental parameters
operating temp	-10～+60℃
Storage temp	-40ºC～+85℃
Humidity	Non - Condensing 10%～95%
Shell protection	IP54
Impact resistance	25G
Vibration resistance	2G
Mechanical parameter
Weight	240g(excluding lens)
Size	59(L)58(W)67(H)mm(excluding lens)
Installation	4 UNC-20, 4 M3 thread mounting holes

Yoseen X-series Thermal camera Temp Range List

Temp Range	Temp Accuracy	NETD
-20~150℃	±2℃or±2%	50mK
0~300℃	±2℃or±2%	70mK
60~600℃	±2℃or±2%	50/90mK
100~1000℃	±2%	---
160~1600℃	±2%	---
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