CN219798234U - Laser sensor and optical measurement system comprising same - Google Patents
Laser sensor and optical measurement system comprising same Download PDFInfo
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- CN219798234U CN219798234U CN202321368790.XU CN202321368790U CN219798234U CN 219798234 U CN219798234 U CN 219798234U CN 202321368790 U CN202321368790 U CN 202321368790U CN 219798234 U CN219798234 U CN 219798234U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 53
- 238000005259 measurement Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 230000010354 integration Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 15
- 238000001514 detection method Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000032368 Device malfunction Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The utility model discloses a laser sensor and an optical measurement system comprising the sensor, wherein the laser sensor comprises: the device comprises a shell, a first optical device and a second optical device which are arranged on the shell, and a camera, a laser and an active temperature control device which are arranged in the shell. The active temperature control device is wrapped outside the laser, and laser emitted by the laser irradiates the steel rail through the first optical device. The laser reflected by the steel rail is collected by the camera through the second optical device. The utility model can solve the technical problems that the existing laser sensor keeps warm in an external hot air mode, the integration degree is not high enough, external heating needs to be controlled independently, inconvenience exists in use, and the sensor works at low temperature due to easy failure of an external heating device, so that the service life of the laser is seriously influenced.
Description
Technical Field
The utility model relates to the technical field of railway engineering machinery, in particular to a laser sensor applied to an automatic centering system of a railway maintenance machinery-rail flaw detection vehicle detection wheel and an optical measurement system comprising the sensor.
Background
At present, most domestic rail flaw detection vehicles are provided with laser automatic centering systems. The laser automatic centering system relies on a laser sensor to detect the outline of a steel rail to acquire the position of a probe wheel on the steel rail in real time, and the laser sensor is usually arranged on a flaw detection device. The operating environment temperature range of the rail flaw detection vehicle is wider, and the laser sensor is generally arranged at the lower part of the vehicle body of the rail flaw detection vehicle and is directly exposed to the external environment. On the one hand, the temperature in summer in the southern area of China is higher, and a certain amount of heat is generated when the laser and the camera work normally, so that the temperature in the sensor is increased. On the other hand, in northern areas of China, particularly in northeast areas, xinjiang Tibet and other areas, the temperature is low in winter, and when the operation starts in cold seasons, the low-temperature start is likely to cause irreversible damage to the internal elements of the sensor, particularly the laser and the driving circuit thereof. Therefore, the laser sensor needs to have proper ambient temperature for normal operation, and the stability and reliability of the laser sensor can be affected by the too high or the too low temperature, and particularly, the service life of the laser and a driving circuit thereof can be seriously affected. Therefore, a novel optical measurement system is developed, a relatively suitable working environment is provided for the laser through a technical means, so that the stability, the reliability and the service life of the laser sensor are improved, and the technical problem to be solved is urgent at present.
In the prior art, the following technical schemes are mainly related to the utility model:
prior art 1 is a chinese utility model application published by the inventor at 29 of 09/2020 and at 15/2020, 12/CN 112083744 a. This application discloses a laser sensor temperature control device, method and sensor including the device, the device includes: the device comprises a blowing device, a heating device, an air guide pipe, a heat dissipation device arranged in the laser sensor and a temperature control module. The air guide pipe is connected between the air blowing device and the shell. The air blowing device generates wind pressure air flow, and the heating device heats the wind pressure air flow to a set temperature value. An air inlet and an air outlet are arranged on the shell, heated wind pressure air flows to the air inlet through the air guide pipe and then flows through the heat dissipation device to be discharged from the air outlet. The temperature control module is used for monitoring the temperature value inside the laser sensor and generating a control command of the heating device according to the temperature value. The application can solve the technical problem that the measurement accuracy and the service life of the laser sensor are influenced by the too high or too low ambient temperature. However, the application keeps warm in the form of external hot air, the integration degree is not high enough, external heating needs to be controlled independently, and certain inconvenience exists during use. Meanwhile, if the external heating device malfunctions, the operation in a low temperature environment will seriously affect the service life of the laser.
Disclosure of Invention
In view of the above, the present utility model aims to provide a laser sensor and an optical measurement system including the sensor, so as to solve the technical problems that the existing laser sensor is insulated by external hot air, the integration degree is not high enough, external heating needs to be controlled independently, inconvenience exists in use, and the sensor works at low temperature due to easy failure of an external heating device, and the service life of the laser is seriously affected.
In order to achieve the above object, the present utility model specifically provides a technical implementation scheme of a laser sensor, including: the device comprises a shell, a first optical device and a second optical device which are arranged on the shell, and a camera, a laser and an active temperature control device which are arranged in the shell. The active temperature control device is wrapped outside the laser, and laser emitted by the laser irradiates the steel rail through the first optical device. The laser reflected by the steel rail is collected by a camera through a second optical device.
Furthermore, the active temperature control device can control the working temperature of the laser through heating or heat dissipation.
Further, the laser emits a line laser for measurement.
Further, the first optical device provides an output window for the output linear laser, and the second optical device provides an input window for the camera to collect the optical signal.
Further, the laser emitted by the laser is red laser falling in a visible light wave band.
Further, the second optical device has the function of an optical filter, and can filter stray light in the environment.
Further, the camera adopts a 3D camera.
The utility model also provides a technical implementation scheme of an optical measurement system, which comprises the following steps: a power supply, a first cable, and a laser sensor as described above. The power supply is connected to a power interface on the shell through a first cable, and the power supply provides working power for the laser and the active temperature control device.
Further, the system also comprises a data processing device and a second cable, wherein the data processing device is connected to a cable interface on the shell through the second cable. The digital signal output by the camera is transmitted to a data processing device through a second cable and converted into a measurement result by the data processing device.
Further, the second cable is a power supply transmission and data transmission cable.
By implementing the technical scheme of the laser sensor and the optical measurement system comprising the sensor provided by the utility model, the laser sensor has the following beneficial effects:
(1) According to the laser sensor and the optical measurement system comprising the same, the active temperature control device wraps the laser, so that good protection and heat preservation effects can be achieved, the laser is always in the surrounding of the active temperature control device no matter how the external environment changes, the working temperature of key devices of the laser is still in the most appropriate range, the environmental adaptability of the laser is improved, the stability and the reliability of the sensor and the measurement system are greatly improved, and the service life of the sensor is prolonged;
(2) The laser sensor and the optical measurement system comprising the sensor adopt an active temperature control mode to protect the device with weaker environmental adaptability so as to achieve the aim of improving the reliability, stability and environmental adaptability of the system, the stability, reliability and environmental adaptability of the laser sensor are further improved through the laser with high reliability, the technical problem that the service life of the laser sensor is reduced due to high-temperature or low-temperature environment is solved, and the stability, reliability and environmental adaptability of the laser automatic centering system of the steel rail flaw detection vehicle are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the utility model, from which other embodiments can be obtained for a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of the structural composition of a laser sensor and an optical measurement system including the sensor according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the structural principle of a laser sensor and an optical measurement system including the sensor according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a laser sensor and an active temperature control device in an embodiment of an optical measurement system including the sensor;
in the figure: 1-laser sensor, 2-casing, 3-camera, 4-laser, 5-first optics, 6-second optics, 7-rail, 8-power, 9-first cable, 10-second cable, 11-initiative temperature control device, 12-data processing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiments of the laser sensor and the optical measuring system comprising the sensor according to the present utility model are shown in fig. 1 to 3, and the present utility model will be further described with reference to the drawings and the embodiments.
Example 1
As shown in fig. 1 and 2, an embodiment of a laser sensor 1 according to the present utility model specifically includes: a housing 2, a first optical device 5 and a second optical device 6 arranged on the housing 2, and a camera 3, a laser 4 and an active temperature control device 11 arranged in the housing 2. As shown in fig. 3, the active temperature control device 11 is wrapped outside the laser 4, and the laser light emitted by the laser 4 irradiates the steel rail 7 through the first optical device 5. The laser light reflected by the rail 7 is collected by the camera 3 through the second optics 6 and converted into a digital signal. The housing 2 of the laser sensor 1 serves to mount and protect the first optical device 5, the second optical device 6, the camera 3, the laser 4 and the active temperature control device 11, to mount a power (input) interface and a (data transmission) cable interface, and to provide a suitable working environment and sufficient protection for the respective components mounted therein. The laser sensor 1 is configured by integrally arranging a laser 4 and a camera 3 in a housing 2.
The active temperature control device 11 is capable of controlling the operating temperature of the laser 4 by heating or heat dissipation. The laser 4 emits a line laser for measurement, which is a red laser falling in the visible light band. The first optical device 5 provides an output window for the output line laser light and the second optical device 6 provides an input window for the camera 3 to collect the optical signal. The second optical device 6 has the function of a filter, which is capable of filtering stray light in the environment for eliminating interference. The camera 3 further employs a 3D camera.
The laser sensor 1 described in embodiment 1 employs an integrated laser structure with an active temperature control device 11. The active temperature control device 11 wraps the laser 4, and can realize good protection and heat preservation. Under such a structural solution, the laser 4 itself is always in the envelope of the active temperature control device 11, and the operating temperature of its critical components is still in the most suitable range, regardless of the external environment. The scheme can also improve the environmental adaptability of the laser 4, greatly improve the stability and reliability of the laser sensor 1 and prolong the service life of the laser sensor 1.
According to the laser sensor 1 disclosed by the embodiment 1 of the utility model, the stability, the reliability and the environmental adaptability of the laser sensor 1 are further improved through the high-reliability laser 4, the technical problem that the service life of the laser sensor is reduced due to a high-temperature or low-temperature environment is solved, and the stability, the reliability and the environmental adaptability of the laser automatic centering system of the steel rail flaw detection vehicle are further improved.
Example 2
As shown in fig. 1 and fig. 2, an embodiment of an optical measurement system specifically includes: a power supply 8, a first cable 9, and a laser sensor 1 as described in embodiment 1. The power supply 8 is connected to the power interface on the housing 2 through a first cable 9, and the power supply 8 provides working power for the laser 4 and the active temperature control device 11.
The optical measurement system further comprises a data processing device 12 and a second cable 10, the data processing device 12 being connected to the cable interface on the housing 2 via the second cable 10. The digital signal output by the camera 3 is transmitted to the data processing device 12 through the second cable 10, and is converted into a measurement result by the data processing device 12, and the data processing device 12 further adopts an industrial personal computer. The second cable 10 is a power transmission and data transmission cable, and is used for realizing data transmission and power connection between the camera 3 and the data processing device 12, and returning the data collected by the camera 3 to the data processing device 12. The data processing device 12 is equipped with data processing software, has a high-precision visual processing algorithm function, and can process acquired data into measurement results.
The optical measurement system scheme described in embodiment 2 adopts an active temperature control mode to protect a device with weaker environmental adaptability, so that the purposes of improving the reliability, stability and environmental adaptability of the system can be achieved.
In the description of the present utility model, it will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the utility model.
By implementing the technical scheme of the laser sensor and the optical measurement system comprising the sensor described in the specific embodiment of the utility model, the following technical effects can be produced:
(1) According to the laser sensor and the optical measurement system comprising the same, disclosed by the embodiment of the utility model, the active temperature control device wraps the laser, so that good protection and heat preservation effects can be realized, the laser is always in the surrounding of the active temperature control device no matter how the external environment changes, the working temperature of key devices of the laser is still in the most appropriate range, the environmental adaptability of the laser is improved, the stability and the reliability of the sensor and the measurement system are greatly improved, and the service life of the sensor is prolonged;
(2) According to the laser sensor and the optical measurement system comprising the same, which are described in the specific embodiment of the utility model, a device with weak environmental adaptability is protected by adopting an active temperature control mode so as to achieve the purposes of improving the reliability, the stability and the environmental adaptability of the system, the stability, the reliability and the environmental adaptability of the laser sensor are further improved through a high-reliability laser, the technical problem that the service life of the laser sensor is reduced due to a high-temperature or low-temperature environment is solved, and the stability, the reliability and the environmental adaptability of the automatic laser centering system of the steel rail flaw detection vehicle are further improved.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model or equivalent embodiments using the method and technical solution disclosed above without departing from the spirit and technical solution of the present utility model. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model, unless departing from the technical solution of the present utility model.
Claims (10)
1. A laser sensor, comprising: a housing (2), a first optical device (5) and a second optical device (6) arranged on the housing (2), and a camera (3), a laser (4) and an active temperature control device (11) arranged in the housing (2); the active temperature control device (11) is wrapped outside the laser (4), and laser emitted by the laser (4) irradiates the steel rail (7) through the first optical device (5); the laser reflected by the steel rail (7) is collected by the camera (3) through the second optical device (6).
2. The laser sensor of claim 1, wherein: the active temperature control device (11) can control the working temperature of the laser (4) through heating or heat dissipation.
3. The laser sensor according to claim 1 or 2, characterized in that: the laser (4) emits a line-shaped laser light for measurement.
4. A laser sensor as claimed in claim 3, wherein: the first optical device (5) provides an output window for the output linear laser, and the second optical device (6) provides an input window for the camera (3) to collect the optical signals.
5. The laser sensor of claim 1, 2 or 4, wherein: the laser emitted by the laser (4) is red laser falling in the visible light wave band.
6. The laser sensor of claim 5, wherein: the second optical device (6) has the function of a filter and can filter stray light in the environment.
7. The laser sensor of claim 1, 2, 4 or 6, wherein: the camera (3) adopts a 3D camera.
8. An optical measurement system, comprising: a power supply (8), a first cable (9), a laser sensor (1) according to any one of claims 1 to 7; the power supply (8) is connected to a power interface on the shell (2) through a first cable (9), and the power supply (8) provides working power for the laser (4) and the active temperature control device (11).
9. The optical measurement system of claim 8, wherein: the system further comprises a data processing device (12) and a second cable (10), the data processing device (12) being connected to a cable interface on the housing (2) by means of the second cable (10); the digital signal output by the camera (3) is transmitted to a data processing device (12) via a second cable (10) and converted into a measurement result by the data processing device (12).
10. The optical measurement system of claim 9, wherein: the second cable (10) is a power supply transmission and data transmission cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321368790.XU CN219798234U (en) | 2023-05-31 | 2023-05-31 | Laser sensor and optical measurement system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321368790.XU CN219798234U (en) | 2023-05-31 | 2023-05-31 | Laser sensor and optical measurement system comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN219798234U true CN219798234U (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321368790.XU Active CN219798234U (en) | 2023-05-31 | 2023-05-31 | Laser sensor and optical measurement system comprising same |
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| Country | Link |
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| CN (1) | CN219798234U (en) |
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- 2023-05-31 CN CN202321368790.XU patent/CN219798234U/en active Active
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