CN220217169U - Fire detection device in laser processing process and laser engraving machine - Google Patents
Fire detection device in laser processing process and laser engraving machine Download PDFInfo
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- CN220217169U CN220217169U CN202321728401.XU CN202321728401U CN220217169U CN 220217169 U CN220217169 U CN 220217169U CN 202321728401 U CN202321728401 U CN 202321728401U CN 220217169 U CN220217169 U CN 220217169U
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- 238000001514 detection method Methods 0.000 title claims abstract description 142
- 238000010147 laser engraving Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 36
- 230000008569 process Effects 0.000 title abstract description 23
- 238000003754 machining Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000000825 ultraviolet detection Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The embodiment of the utility model discloses a fire detection device in a laser processing process and a laser engraving machine. The device comprises: the detection module and the control module; wherein the detection module comprises a flame detection sensor and an ambient light detection sensor; the flame detection sensor is used for detecting a laser processing area to obtain a first sensor signal, and transmitting the first sensor signal to the control module; the ambient light detection sensor is used for detecting ambient light to obtain a second sensor signal, and the second sensor signal is transmitted to the control module. According to the technical scheme provided by the embodiment of the utility model, the laser processing area and the ambient light are detected simultaneously by using the two sensors, and the obtained sensor signals are provided for the control module, so that false alarms caused by the influence of the ambient light are avoided, the accuracy of the fire detection result is improved, and the success rate of cutting or carving works is improved.
Description
Technical Field
The embodiment of the utility model relates to the technical field of lasers, in particular to a fire detection device and a laser engraving machine in a laser processing process.
Background
The laser technology promotes the development of modern industry, and along with the progress of technology, under the background of 4.0 industry and intelligent manufacturing, the laser engraving machine is used as a new technology to replace the traditional technology, so that the problem that many traditional technologies cannot solve in social production is solved, and the production efficiency is improved. Along with the gradual maturation of the laser technology, the cost is reduced, the application field is expanded from industry to civilian use, the laser engraving is a material reduction manufacturing technology, is not limited by materials, can be expected to be popularized in the future and enter the life of ordinary people, and becomes a common household production tool.
With the development of industry, the power of the main flow laser head is developed from the initial 5W to the current maximum 40W, and the higher the power is, the higher the energy density is, and the easier the fire is generated during cutting. The mainstream solution in the industry is to add an infrared sensor below the laser head as a flame detection device, but false alarms often occur because it is susceptible to ambient light.
Disclosure of Invention
The embodiment of the utility model provides a fire detection device and a laser engraving machine in a laser processing process, which are used for avoiding false alarm caused by the influence of ambient light, so that the accuracy of a fire detection result is improved.
In a first aspect, an embodiment of the present utility model provides a device for detecting a fire during a laser processing process, including: the detection module and the control module; wherein,
the detection module comprises a flame detection sensor and an ambient light detection sensor; the flame detection sensor is used for detecting a laser processing area to obtain a first sensor signal, and transmitting the first sensor signal to the control module; the ambient light detection sensor is used for detecting ambient light to obtain a second sensor signal, and the second sensor signal is transmitted to the control module.
Optionally, the detection module further includes a housing, the flame detection sensor and the ambient light detection sensor are both fixed on the housing, and the flame detection sensor is disposed on a back side of the housing with respect to the ambient light detection sensor.
Optionally, the housing is internally configured to house a laser head, and the laser head is fixed on a side near the flame detection sensor.
Optionally, the housing is further configured to house a fan, and the fan is fixed on a side close to the ambient light detection sensor.
Optionally, the control module is used for transmitting a control signal to the laser head so as to control the start and stop of the laser head.
Optionally, a data interface is provided on the housing, and the flame detection sensor and the ambient light detection sensor are both connected with the control module through the data interface.
Optionally, the device further comprises an alarm module, and the control module is used for transmitting an alarm signal to the alarm module so as to control the alarm module to alarm.
Optionally, the flame detection sensor and the ambient light detection sensor are both infrared sensors.
Optionally, the control module includes a single chip microcomputer.
In a second aspect, an embodiment of the present utility model further provides a laser engraving machine, including the fire detection device for a laser processing process provided by any embodiment of the present utility model.
In a third aspect, an embodiment of the present utility model further provides a method for detecting a fire during a laser processing, which is applied to the device for detecting a fire during a laser processing provided in any embodiment of the present utility model, where the method includes:
detecting a laser processing area through a flame detection sensor to obtain a first sensor signal;
detecting the ambient light through an ambient light detection sensor to obtain a second sensor signal;
and if the first sensor signal is suddenly changed and the second sensor signal is not suddenly changed at the same time, judging that the fire is currently generated.
Optionally, the flame detection sensor and the ambient light detection sensor both detect according to a preset frequency;
correspondingly, if the first sensor signal is suddenly changed and the second sensor signal is not suddenly changed, determining that a fire currently occurs includes:
comparing a current first sensor signal with a previous first sensor signal in real time, and determining that the first sensor signal is suddenly changed if the deviation between the current first sensor signal and the previous first sensor signal exceeds a first preset threshold value;
and comparing the current second sensor signal with the previous second sensor signal in real time, and determining that the second sensor signal is suddenly changed if the deviation between the current second sensor signal and the previous second sensor signal exceeds a second preset threshold value.
Optionally, after the determining that the fire currently occurs, the method further includes:
and controlling the laser head to stop laser processing.
Optionally, after the determining that the fire currently occurs, the method further includes:
and controlling the alarm module to alarm.
The embodiment of the utility model provides a fire detection device in a laser processing process, which comprises a detection module and a control module, wherein the detection module comprises a flame detection sensor and an ambient light detection sensor, the flame detection sensor can detect a first sensor signal of a laser processing area and transmit the signal to the control module, and the ambient light detection sensor can detect a second sensor signal of ambient light and transmit the signal to the control module. According to the device for detecting the fire in the laser processing process, provided by the embodiment of the utility model, the two sensors are used for detecting the laser processing area and the ambient light at the same time, and the obtained sensor signals are provided for the control module, so that false alarms caused by the influence of the ambient light are avoided, the accuracy of the fire detection result is improved, and the success rate of cutting or engraving works is improved.
Drawings
Fig. 1 is a schematic structural diagram of a fire detection device in a laser processing process according to a first embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a detection module according to a first embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of another detection module according to a first embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a detection module according to a first embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a laser engraving machine according to a second embodiment of the present utility model;
fig. 6 is a flowchart of a method for detecting a fire during laser processing according to a third embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts steps as a sequential process, many of the steps may be implemented in parallel, concurrently, or with other steps. Furthermore, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Furthermore, the terms "first," "second," and the like, may be used herein to describe various directions, acts, steps, or elements, etc., but these directions, acts, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first sensor signal may be referred to as a second sensor signal, and similarly, a second sensor signal may be referred to as a first sensor signal, without departing from the scope of embodiments of the present utility model. The first sensor signal and the second sensor signal are both sensor signals, but they are not the same sensor signal. The terms "first," "second," and the like, 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 embodiments of the present utility model, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.
Example 1
Fig. 1 is a schematic structural diagram of a fire detection device in a laser processing process according to an embodiment of the present utility model, where the embodiment is applicable to detecting whether a fire occurs in a laser processing area in the laser processing process. As shown in fig. 1, the apparatus includes: a detection module 100 and a control module 200; wherein the detection module 100 includes a flame detection sensor 110 and an ambient light detection sensor 120; the flame detection sensor 110 is configured to detect a laser processing area, obtain a first sensor signal, and transmit the first sensor signal to the control module 200; the ambient light detection sensor 120 is configured to detect ambient light, obtain a second sensor signal, and transmit the second sensor signal to the control module 200.
This embodiment may be used to control the operation of the laser head by the control module 200 based on the first sensor signal and the second sensor signal. Specifically, the flame detection sensor 110 and the ambient light detection sensor 120 may be any of a fixed radiation type sensor (ultraviolet detection type, infrared detection type, or the like), a scintillation type sensor (single wavelength detection type, two wavelength detection type, CO2 resonance radiation detection type, or the like), or a composite type sensor (composite of fixed radiation type and scintillation type). Optionally, the flame detection sensor 110 and the ambient light detection sensor 120 are both infrared sensors. Since both ambient light (such as sunlight) and flame generate infrared rays, the infrared rays of the laser processing area can be detected by the flame detection sensor 110, so as to obtain a first sensor signal and transmit the first sensor signal to the control module 200, and the infrared rays in the ambient light can be detected by the ambient light detection sensor 120, so as to obtain a second sensor signal and transmit the second sensor signal to the control module 200. The control module 200 may thus determine whether a fire is occurring in the current laser machining area based on the received first and second sensor signals, and, illustratively, may determine that ambient light is changing when the first sensor signal is changing in synchronization with the second sensor signal, and may determine that a fire is occurring in the laser machining area when the first sensor signal alone is changing. Wherein the flame detection sensor 110 may be disposed to be directed to a laser processing area, and the ambient light detection sensor 120 may be disposed to be directed to an area other than the laser processing area. Preferably, since the influence of the ambient light is generally from the direction of the laser processing region when the laser processing is performed, the ambient light detection sensor 120 may be disposed to be directed to the direction of the laser processing region. The control module 200 may be a controller, specifically may share a controller of the laser processing apparatus, and the flame detection sensor 110 and the ambient light detection sensor 120 may be directly fixed to a laser head assembly of the existing laser processing apparatus. Optionally, the control module 200 includes a single-chip microcomputer, and the flame detection sensor 110 and the ambient light detection sensor 120 may specifically transmit the first sensor signal and the second sensor signal obtained by corresponding detection to the single-chip microcomputer for processing.
On the basis of the above technical solution, optionally, as shown in fig. 2, the detection module 100 further includes a housing 130, the flame detection sensor 110 and the ambient light detection sensor 120 are both fixed on the housing 130, and the flame detection sensor 110 is disposed on a back side of the housing 130 with respect to the ambient light detection sensor 120. Specifically, the flame detection sensor 110 may be disposed at the bottom of the housing 130, and the housing 130 bottom may be oriented toward the laser machining area when in use, and the ambient light detection sensor 120 may be disposed at the top of the housing 130 to facilitate detection of ambient light above.
Further alternatively, the housing 130 is internally configured to house a laser head, and the laser head is fixed to a side close to the flame detection sensor 110. Specifically, the housing 130 is internally formed with a receiving cavity that can be used to house the laser head, while the housing 130 can be provided with an opening in the laser head exit direction for the laser head to process. Specifically can fix the laser head of current laser processing equipment in the inside flame detection sensor 110 one side that is close to of casing 130, then flame detection sensor 110 can follow the laser head to detect current laser processing region at the fine in-process that the laser head carries out laser processing. Further, the direction of the sensing surface of the flame detection sensor 110 may be the same as the emitting direction of the laser light, and accordingly, the direction of the sensing surface of the ambient light detection sensor 120 may be opposite to the emitting direction of the laser light.
Further alternatively, as shown in fig. 3, the housing 130 is further provided with a fan 140 inside, and the fan 140 is fixed to a side close to the ambient light detection sensor 120. Specifically, the accommodating cavity formed in the housing 130 may also be used for placing the fan 140, and the fan 140 may be disposed above the laser head, so as to radiate heat in the laser processing area in time during the laser processing process, or extinguish fire when firing. Specifically, the fan 140 may be fixed on a side close to the ambient light sensor 120, and a corresponding air inlet is provided on the side housing 130, so as to ensure the working effect of the fan 140.
Further optionally, the control module 200 is configured to transmit a control signal to the laser head to control start and stop of the laser head. Specifically, the control module 200 may control the laser head to start working, and may control the laser head to stop working after determining that the current laser processing area is on fire according to the first sensor signal and the second sensor signal, so as to ensure processing safety.
On the basis of the above technical solution, optionally, as shown in fig. 4, a data interface 150 is provided on the housing 130, and the flame detection sensor 110 and the ambient light detection sensor 120 are connected with the control module 200 through the data interface 150. The data interface 150 may be a USB interface such as Type-C. The flame detection sensor 110 and the ambient light detection sensor 120 may transmit the corresponding detected first sensor signal and second sensor signal to the control module 200 through the data interface 150. Further, the control module 200 can also transmit control signals to the laser head through the data interface 150 and control the operation of the fan 140, etc.
On the basis of the above technical solution, optionally, the device further includes an alarm module, and the control module 200 is configured to transmit an alarm signal to the alarm module, so as to control the alarm module to alarm. Specifically, when the control module 200 determines that the current laser processing area is on fire according to the first sensor signal and the second sensor signal, an alarm signal may also be transmitted to the alarm module, so as to control the alarm module to alarm, so as to prompt the user to pay attention. The alarm module may include an indicator light and/or a buzzer, among others.
The device for detecting the fire in the laser processing process comprises a detection module and a control module, wherein the detection module comprises a flame detection sensor and an ambient light detection sensor, the flame detection sensor can detect and obtain a first sensor signal of a laser processing area and transmit the signal to the control module, and the ambient light detection sensor can detect and obtain a second sensor signal of ambient light and transmit the signal to the control module. By using two sensors to detect the laser processing area and the ambient light at the same time and providing the obtained sensor signals for the control module, false alarms caused by the influence of the ambient light are avoided, and the accuracy of the fire detection result is improved, so that the success rate of cutting or engraving works is improved.
Example two
Fig. 5 is a schematic structural diagram of a laser engraving machine according to a second embodiment of the present utility model, where the laser engraving machine includes the fire detection device for a laser processing process according to any embodiment of the present utility model, and has a functional structure and beneficial effects corresponding to the fire detection device. As shown in fig. 5, a material to be processed may be placed on a table surface of a laser engraving machine, and laser processing may be performed by a laser head above, and a detection module 100 in a fire detection device during laser processing may move along with the laser head during processing, so as to detect a current laser processing area in real time.
Example III
Fig. 6 is a flowchart of a method for detecting a fire in a laser processing process according to a third embodiment of the present utility model, where the present embodiment is applicable to detecting whether a fire occurs in a laser processing area in a laser processing process, and is applicable to a device for detecting a fire in a laser processing process according to any embodiment of the present utility model. As shown in fig. 6, the method specifically comprises the following steps:
and S61, detecting the laser processing area by a flame detection sensor to obtain a first sensor signal.
And S62, detecting the ambient light through an ambient light detection sensor to obtain a second sensor signal.
And S63, if the first sensor signal is suddenly changed and the second sensor signal is not suddenly changed, judging that the fire is currently generated.
Specifically, the laser processing area can be detected in real time through the flame detection sensor to obtain a first sensor signal, and the ambient light is detected in real time through the ambient light detection sensor to obtain a second sensor signal. If the current ambient light changes, such as changing from a cloudy day to a sunny day outdoors, or suddenly turning on a light source indoors, etc., the first sensor signal and the second sensor signal generally mutate synchronously, but if the laser processing area fires, the first sensor signal will not mutate at the same time, and the second sensor signal will not mutate. Therefore, if the first sensor signal is suddenly changed and the second sensor signal is not suddenly changed, it can be determined that a fire is currently occurring, and if the first sensor signal and the second sensor signal are suddenly changed, it can be determined that a fire is not currently occurring but that an ambient light change occurs.
Wherein, optionally, the flame detection sensor and the ambient light detection sensor both detect according to a preset frequency; correspondingly, if the first sensor signal is suddenly changed and the second sensor signal is not suddenly changed, determining that a fire currently occurs includes: comparing a current first sensor signal with a previous first sensor signal in real time, and determining that the first sensor signal is suddenly changed if the deviation between the current first sensor signal and the previous first sensor signal exceeds a first preset threshold value; and comparing the current second sensor signal with the previous second sensor signal in real time, and determining that the second sensor signal is suddenly changed if the deviation between the current second sensor signal and the previous second sensor signal exceeds a second preset threshold value.
Specifically, the flame detection sensor and the ambient light detection sensor can synchronously detect according to the same preset frequency, and the preset frequency can be set large enough, so that misjudgment caused by simultaneous occurrence of fire and ambient light change in a short time is avoided. When a first sensor signal is obtained through detection, the current first sensor signal and the previous first sensor signal can be compared in real time, and if the deviation between the current first sensor signal and the previous first sensor signal exceeds a first preset threshold value, the first sensor signal can be considered to be suddenly changed. Similarly, when a second sensor signal is obtained through detection, the current second sensor signal and the previous second sensor signal can be compared in real time, and if the deviation between the current second sensor signal and the previous second sensor signal exceeds a second preset threshold value, the second sensor signal can be considered to be suddenly changed. The first preset threshold and the second preset threshold can be set according to the current environment during processing or the voltage provided by the sensor, and the first preset threshold and the second preset threshold can be the same or different. For example, taking the first preset threshold value as 1.5V and the second preset threshold value as 1V as an example, when the first sensor signal is detected to change from 0.7V to 3V (the deviation is 2.3V) and the second sensor signal is detected to be continuously at 1.5V (the deviation is close to 0V), the first sensor signal is determined to be suddenly changed, and the second sensor signal is not suddenly changed, so that the fire can be determined. When the first sensor signal is detected to be changed from 0.5V to 2.5V (the deviation is 2V) and the second sensor signal is detected to be changed from 1V to 3V (the deviation is 2V), the first sensor signal is recognized as being suddenly changed, the second sensor signal is also suddenly changed, and the ambient light is determined as being changed.
On the basis of the above technical solution, optionally, after the determining that the fire currently occurs, the method further includes: and controlling the laser head to stop laser processing so as to ensure processing safety. Accordingly, if only the change of the ambient light is detected, the laser head can be controlled to continue processing.
On the basis of the above technical solution, optionally, after the determining that the fire currently occurs, the method further includes: the control alarm module alarms to prompt the attention of the user. The alarm module may include an indicator light and/or a buzzer, among others.
According to the technical scheme provided by the embodiment of the utility model, the laser processing area and the ambient light are detected by using the two sensors at the same time, and the occurrence of fire is judged only when the detection signal of the laser processing area is mutated and the detection signal of the ambient light is not mutated, so that false alarm caused by the influence of the ambient light is avoided, the accuracy of the fire detection result is improved, and the success rate of cutting or engraving works is improved.
Claims (10)
1. A laser machining process fire detection device, comprising: the detection module and the control module; wherein,
the detection module comprises a flame detection sensor and an ambient light detection sensor; the flame detection sensor is used for detecting a laser processing area to obtain a first sensor signal, and transmitting the first sensor signal to the control module; the ambient light detection sensor is used for detecting ambient light to obtain a second sensor signal, and the second sensor signal is transmitted to the control module.
2. The laser machining process fire detection device of claim 1, wherein the detection module further comprises a housing, the flame detection sensor and the ambient light detection sensor are both fixed to the housing, and the flame detection sensor is disposed on a back side of the housing relative to the ambient light detection sensor.
3. The laser machining process fire detection device according to claim 2, wherein the housing is internally provided to accommodate a laser head, and the laser head is fixed to a side close to the flame detection sensor.
4. A laser machining process fire detection device as claimed in claim 3 wherein the housing interior is further adapted to house a fan and the fan is secured to a side adjacent the ambient light detection sensor.
5. A laser machining process fire detection device according to claim 3, wherein the control module is configured to transmit a control signal to the laser head to control the start and stop of the laser head.
6. The laser machining process fire detection device according to claim 2, wherein a data interface is provided on the housing, and the flame detection sensor and the ambient light detection sensor are both connected with the control module through the data interface.
7. The laser machining process fire detection device according to claim 1, further comprising an alarm module, wherein the control module is configured to transmit an alarm signal to the alarm module to control the alarm module to alarm.
8. The laser machining process fire detection device of claim 1, wherein the flame detection sensor and the ambient light detection sensor are both infrared sensors.
9. The laser machining process fire detection device of claim 1, wherein the control module comprises a single chip microcomputer.
10. A laser engraving machine comprising a laser machining process fire detection device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321728401.XU CN220217169U (en) | 2023-07-04 | 2023-07-04 | Fire detection device in laser processing process and laser engraving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321728401.XU CN220217169U (en) | 2023-07-04 | 2023-07-04 | Fire detection device in laser processing process and laser engraving machine |
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| Publication Number | Publication Date |
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| CN220217169U true CN220217169U (en) | 2023-12-22 |
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| CN202321728401.XU Active CN220217169U (en) | 2023-07-04 | 2023-07-04 | Fire detection device in laser processing process and laser engraving machine |
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- 2023-07-04 CN CN202321728401.XU patent/CN220217169U/en active Active
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