CN212904516U - Portable gas leakage detection device - Google Patents
Portable gas leakage detection device Download PDFInfo
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- CN212904516U CN212904516U CN202120375764.4U CN202120375764U CN212904516U CN 212904516 U CN212904516 U CN 212904516U CN 202120375764 U CN202120375764 U CN 202120375764U CN 212904516 U CN212904516 U CN 212904516U
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Abstract
The application provides a portable gas leakage detection device, including infrared imaging module, visible light imaging module, display module, processor module, a key alarm module, battery module. The imaging device also comprises a shell, a handle and a positioning mechanism, wherein the shell comprises an imaging shell part and a handheld shell part which are connected; the infrared imaging module, the visible light imaging module and the processor module are assembled inside the imaging shell; the battery module is assembled inside the hand-held housing part. Therefore, the product can be moved and carried.
Description
Technical Field
The application relates to the technical field of imaging monitoring, in particular to a portable gas leakage detection device.
Background
In recent years, with the rapid development of industrialization in China, industrial parks in various regions are continuously established. And pollution events caused by dangerous gas leakage, waste gas stealing and the like in some chemical industry parks also occur, which causes serious influence on the surrounding environment and residents. How to effectively prevent the harm of industrial areas to the environment and residents while keeping the high-speed development of economy is becoming an increasingly important work content for all levels of government departments.
At present, the domestic gas leakage detection mode is two common modes of a point type chemical sensor and a line type laser active detection mode, the point type chemical sensor needs to be sucked for reaction to carry out detection, and false alarm are easily generated due to weather influence. Mode that laser line formula initiative was polished has certain potential safety hazard in chemical industry garden danger area to point type and laser formula can not realize the visualization of gas leakage, and unable audio-visual supplementary operating personnel observes gas leakage point. Moreover, most of the existing detection devices are fixed on the site, which is not beneficial to monitoring of workers at any time and any place.
Therefore, to the gas monitoring technology field in chemical industry garden, a portable visual infrared gas leakage detection device remains to be developed to conveniently carry and monitor at any time and any place, can realize the detection of gas again, and can assist the judgement through visual images again.
SUMMERY OF THE UTILITY MODEL
In view of the above problems in the prior art, the present application provides a portable gas leakage detection device to realize that it is portable, and realize infrared monitoring and visual monitoring to gas detection.
To achieve the above object, the present application provides a portable gas leak detection apparatus, comprising:
the infrared imaging module comprises an infrared optical lens, a filter and an infrared detector which are positioned on a light path;
a visible light imaging module;
the display module comprises a display and a touch screen driving module which are electrically connected with each other;
the processor module is electrically connected with the infrared imaging module, the visible light imaging module and the display module;
the peripheral module comprises a one-key alarm module which is electrically connected with the processor module;
the battery module supplies power to each module;
a housing including an imaging housing portion and a hand-held housing portion connected; the infrared imaging module, the visible light imaging module and the processor module are assembled inside the imaging shell; the battery module is assembled inside the hand-held housing part.
From the above, since the battery module is provided, the mobility and portability of the apparatus can be realized.
And, still realize gathering the infrared spectrum image of the target of being surveyed through infrared imaging module to whether there is gas leakage to monitor, on the other hand, still can gather the visible light image of the target of being surveyed through visible light imaging module, so that the more direct-viewing of user is surveyed the target gas leakage condition, and relevant scene condition.
Optionally, the peripheral module further includes a positioning module, and the positioning module is connected to the processor module.
Therefore, when the gas leakage is monitored, the related positioning information can be sent to the operation command center.
Optionally, the peripheral module further includes a communication module, and the communication module is connected to the processor module.
When the user judges that gas leaks, the button provided by the one-key alarm module is operated to trigger the visible light imaging module to take pictures or record videos, and the communication module sends an alarm signal containing positioning information and shooting data to the operation command center.
Optionally, the peripheral module further includes a storage module, and the storage module is connected to the processor module.
Therefore, local storage of relevant data can be realized, and later analysis is facilitated, for example, the tracing of the leakage gas to the source and the searching of the specific leakage position and the later infrared spectrum image analysis are facilitated.
Optionally, the infrared imaging module further includes:
the separation blade driving module is respectively connected with the separation blade and the processor module;
the TEC temperature control module is connected with the infrared detector and the processor module;
and the analog-to-digital conversion module is connected with the infrared detector and the processor module.
Optionally, the peripheral module further includes a speaker and a microphone, and the speaker and the microphone are respectively connected to the processor module.
Therefore, voice communication with the operation command center can be realized.
Optionally, the display is disposed perpendicular to the imaging housing portion.
Optionally, an operation panel is further disposed at a connection position of the imaging housing portion and the handheld housing portion, and the operation panel includes the one-key alarm module, a power switch key, a change-over switch and a knob; the change-over switch and the knob are respectively electrically connected with the processor module.
These and other aspects of the present application will be more readily apparent from the following description of the embodiment(s).
Drawings
The various features and the connections between the various features of the present application are further described below with reference to the drawings. The figures are exemplary, some features are not shown to scale, and some of the figures may omit features that are conventional in the art to which the application relates and are not essential to the application, or show additional features that are not essential to the application, and the combination of features shown in the figures is not intended to limit the application. In addition, the same reference numerals are used throughout the specification to designate the same components. The specific drawings are illustrated as follows:
FIG. 1 is a schematic illustration of a perspective view of a portable gas leak detection apparatus of the present application;
FIG. 2 is a schematic illustration of a front view of the portable gas leak detection apparatus of the present application;
FIG. 3 is a schematic illustration of a rear view of the portable gas leak detection apparatus of the present application;
fig. 4 is a schematic diagram of an internal module of the portable gas leak detection apparatus of the present application.
Detailed Description
The terms "first, second, third and the like" or "module a, module B, module C and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that specific orders or sequences may be interchanged where permissible to effect embodiments of the present application in other than those illustrated or described herein.
In the following description, reference to reference numerals indicating steps, such as S110, S120 … …, etc., does not necessarily indicate that the steps are performed in this order, and the order of the preceding and following steps may be interchanged or performed simultaneously, where permissible.
The term "comprising" as used in the specification and claims should not be construed as being limited to the contents listed thereafter; it does not exclude other elements or steps. It should therefore be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, and groups thereof. Thus, the expression "an apparatus comprising the devices a and B" should not be limited to an apparatus consisting of only the components a and B.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, as would be apparent to one of ordinary skill in the art from this disclosure.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In the case of inconsistency, the meaning described in the present specification or the meaning derived from the content described in the present specification shall control. In addition, the terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.
To accurately describe the technical content in the present application and to accurately understand the present application, terms used in the present specification are given the following explanation or definition before describing the specific embodiments:
an infrared imaging device: also known as an infrared imager, and specifically an infrared imaging lens, an infrared detector in the optical path of the lens to convert infrared light signals into electrical signals. A blocking piece is arranged between the lens and the infrared detector, and the blocking piece is driven to block or open a light path from the lens to the infrared detector through a set time interval or manual starting. The baffle plate has the functions that: the infrared detector is difficult to carry out self-adaptive adjustment according to external temperature and humidity, and when the infrared imaging device is used for a period of time or a measured object and humidity change, the infrared detector parameters need to be reset through blocking piece shielding, so that the aim of calibration is fulfilled.
FPGA: a semi-custom circuit in application-specific integrated circuit is a Programmable logic Array (FPGA).
ARM processor is a RISC microprocessor designed by Acorn Inc. facing the low-budget market. Over 95% of smart phones and tablet computers worldwide adopt the ARM architecture.
The TEC temperature control module comprises: the TEC is a semiconductor Cooler (TEC), and heating or cooling is realized by applying positive and negative voltages. When the method is applied to an infrared imaging device, the temperature of an infrared detector of the infrared imaging device is controlled, and the temperature parameter of the infrared detector is adjusted.
MIPI: mobile Industry Processor Interface (MIPI). MIPI is an open standard initiated by the MIPI alliance that is established for mobile application processors.
DVP: a parallel port transmission protocol.
TF, EMMC: are all a memory chip specification.
MIC: microphone (Microphone).
A Power Management chip (Power Management Integrated Circuits) is a chip that plays roles in transforming, distributing, detecting and other electric energy Management in an electronic equipment system, and is mainly responsible for identifying Power supply amplitudes of other modules, generating corresponding short moment waves and pushing a rear-stage circuit to output Power. Common power management chips include LMG3410R050, UCC12050, BQ25790, HIP6301, IS6537, RT9237, ADP3168, KA7500, TL494 and other chips.
This application one side can monitor the gaseous infrared radiation in the scene and carry out the formation of image, forms infrared light signal, and on the other hand can be through shooing or video acquisition visible light image to can show through infrared image whether there is gas leakage, and be used for assisting operating personnel contrast through visible light image and judge leakage point where. The present application is described in detail below with reference to the attached drawings.
Fig. 1, 2, and 3 show the overall structure of the present application, which includes a housing, the housing includes an imaging housing portion 71 in which the infrared imaging module 10 is mounted, the housing is horizontally disposed and is connected to a handheld housing portion 72, the handheld housing portion 72 is vertically disposed and is mounted with the battery 61 therein, the display 51 extends laterally from the connection between the imaging housing portion 71 and the handheld housing portion 72, and the display 51 is perpendicular to the imaging housing portion 71.
An operation panel 73 is further disposed at the connection between the imaging housing part 71 and the handheld housing part 72, the operation panel 73 includes a one-key alarm module 45, a power switch button 732, a switch 734, and a knob 733, wherein the switch 734 is used for implementing the functions of image pickup and photographing under the condition of long press and short press. The knob 733 is used to switch different display modes, including switching of display modes of visible, gray, iron red, aurora, lava, rainbow, temperature, and the like. The change-over switch and the knob are respectively electrically connected with the processor module.
Fig. 4 shows an embodiment of the internal modules of the portable gas leak detection apparatus of the present application, including an infrared imaging module 10, a visible light imaging module 20, a processor module 30, a peripheral module 40, a display module 50, and a battery module 60. Wherein:
the infrared imaging module 10 includes an infrared optical lens, a filter, a baffle 101 and an infrared detector 102, which are located on the optical path (e.g. coaxially arranged), and the response band of the infrared optical lens, the central wavelength of the filter and the response band of the infrared detector 102 are matched with the infrared absorption band of the target gas. The infrared imaging module 10 further includes a shutter driving module 103, a TEC temperature control module 104, and an analog-to-digital conversion module 105. The blocking plate driving module 103, the TEC temperature control module 104, and the analog-to-digital conversion module 105 may also be referred to as an infrared core.
The infrared optical lens and the filter plate form an optical part, the infrared optical lens is used for collecting infrared radiation in a monitoring scene and imaging, and the filter plate is used for acquiring an infrared light signal of gas with an infrared absorption waveband being a specific waveband and taking the infrared light signal as a target infrared light signal. The filter can be placed in front of the infrared optical lens and also can be placed behind the infrared optical lens.
The infrared detector 102 is used for converting a received target infrared light signal into an electrical analog signal; the infrared detector 102 is classified into a refrigeration type and a non-refrigeration type, the refrigeration type must be provided with a refrigeration system, the non-refrigeration type can directly work at normal temperature, and the non-refrigeration type infrared detector has smaller volume and lower cost and power consumption.
The baffle plate 101 is used for shielding or opening the light path of the infrared detector 102 through opening and closing thereof, so that the infrared detector 102 is corrected.
The blocking piece driving module 103 is connected with the processor module 30 and the blocking piece 101, and is used for receiving the control of the processor module 30, driving the motor action of the blocking piece 101, and realizing the opening and closing of the blocking piece 101, so that the correction of the infrared detector 102 is realized.
The TEC temperature control module 104 is connected to the processor module 30 and the infrared detector 102, and configured to acquire an actual temperature of the infrared detector 102, and after comparing the actual temperature with a target temperature, the processor module 30 outputs a control signal to drive the TEC temperature control module 104 to complete temperature increase or temperature decrease of the infrared detector 102, so as to achieve a set target temperature. The TEC temperature control module 104 includes a temperature sensor, a semiconductor cooling heat plate (TEC), and a TEC drive circuit.
The analog-to-digital conversion module 105 is electrically connected between the infrared detector 102 and the processor module 30, and is configured to receive the video analog signal output by the infrared detector 102, convert the video analog signal into a digital signal, and transmit the digital signal to the processor module 30.
Visible light imaging module 20 is used for taking the scene photo, when operating personnel patrols and examines and has operated this device and shoot this scene when finding that there is gas leakage in the scene, can obtain infrared image and visible light image simultaneously, and whether infrared image embodies has gas leakage, and the visible light image is used for assisting operating personnel to compare and judge leakage point and where.
The processor module 30 is configured to receive the infrared digital video signal of the infrared imaging module 10 and the digital video signal of the visible light imaging module 20, output the processed digital video signal to a display screen or an external module, and further output a control signal to the barrier driving module 103 and a control signal to the TEC temperature control module 104. The processor module 30 may be internally composed of an ARM main processor 32 and an FPGA coprocessor 31, the FPGA coprocessor 31 is used for realizing control of the infrared imaging part, and the ARM main processor 32 is used for processing an infrared digital video signal and a visible light digital video signal.
The peripheral module 40 comprises a loudspeaker 41, an MIC42, a TF card 43, an EMMC44, a one-key alarm module 45, a communication module 46 and a positioning module 47. When an operator finds that gas leaks from a scene, the button is pressed, a trigger signal is sent to the processor module 30 to trigger alarm, the processor module 30 receives the trigger signal, immediately starts the infrared imaging module 10 and the visible light imaging module 20 to record a current scene, obtains current positioning information through the positioning module 47, and sends the shooting data and the positioning information to a remote command control center through the communication module 46. The TF card 43 and the EMMC44 may store related data, and the speaker 41 and the MIC42 may be used for voice communication with the speaker 41 and the MIC 42.
The display module 50 is used for displaying digital video signals. Which includes a display 51 and a touch screen driver module 52. The touch screen driving module 52 is configured to implement input of a touch screen, and when the touch screen is a capacitive screen, the touch screen driving module 52 may be implemented by a capacitive screen touch driving chip, such as a ft5406 chip.
The battery module 60 is used to supply power to the above modules. It may include a battery 61 and a battery management module 62, wherein the battery management module 62 is implemented by a battery management chip.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a specific implementation that can be implemented based on fig. 4 is further described below:
in this specific embodiment, the infrared optical lens may be a medium-wavelength infrared lens, the response wavelength band may be 6 μm to 14 μm, the focal length may be 20 mm to 70 mm, the F number may be any value less than or equal to 1.1, the lens surface of the medium-wavelength and long-wavelength infrared lens is plated with an antireflection film, and the transmittance is greater than 88%.
For most VOCs gases, the absorption peak bands are common in the mid-wave infrared and long-wave infrared. Starting from planck formula M (λ, T) = c _1 ⁄ (λ ^5 ∙ 1 ⁄ (exp ((c _2 ⁄ λ T) -1))), wherein M (λ, T) is black body radiation at T temperature, c _1 is a first radiation constant, c _2 is a second radiation constant, T is temperature, λ is wavelength. Typically, c _1=3.74 × 10^ (-16) W ∙ m ^2, c _2=1.44 × 10^ (-2) W ∙ K. Taking a blackbody at 27 ℃ as an example, the energy density of long-wave infrared radiation is 172.5672W/m2, and the energy density of medium-wave infrared radiation is 5.8611W/m 2, and it can be seen that the energy of long-wave infrared radiation is about 29 times that of medium-wave infrared radiation. Therefore, an infrared lens with the response wave band of 6-14 μm is selected. In addition, in the present embodiment, reference data of the optimal parameters of the medium-and-long-wave infrared lens is provided, and the reference data is only used for reference, and can be automatically adjusted in the above range according to special use conditions. The optimal parameter reference data given in this example are response bands of 6 μm to 8.5 μm and 8 μm to 12 μm, a focal length of 18mm, and an F-number of 0.7.
In this embodiment, the filter is a band pass filter. The band-pass filter only allows infrared light signals of gas with infrared absorption wave bands being specific wave bands to pass through, and light signals of wave bands before and after the specific wave bands are all intercepted, so that the influence of other infrared radiation on the monitoring effect is prevented. The selection of the central wavelength of the band-pass filter depends on the infrared absorption peak of the gas to be measured, the selected bandwidth must ensure that the system has higher overall sensitivity under the condition of ensuring the signal-to-noise ratio, and has higher transmittance in a transmission waveband, so that the attenuation of radiation transmission in a light path can be reduced, and ineffective radiation in other wavebands can be effectively filtered.
Taking methane as an example, inquiring an HITRAN database to know that the infrared absorption peak of the methane in a long wave is 7.661 μm, selecting the central wavelength of the band-pass filter corresponding to the infrared absorption peak of the methane as 7.661 μm, considering the preparation difficulty and the overall sensitivity requirement of the band-pass filter, selecting the full width at half maximum bandwidth as 180nm, wherein the average transmittance is more than 80%, and the average transmittance in the rest wave bands of 0.4-11 μm is less than 1%.
In this specific embodiment, the infrared detector 102 is an uncooled infrared detector, so as to further reduce the cost and power consumption of the infrared image real-time processing system and reduce the size thereof.
In this embodiment, the visible light imaging module 20 may further be configured with a corresponding high-power light supplement device, so that a clear picture can be taken when the light is insufficient.
In this embodiment, the positioning module 47 may adopt a GPS positioning module or a beidou positioning module.
The following is a description of the operation of the portable gas leak detection apparatus of the present application so that the working principle of the present invention can be further understood:
an operator holds the portable gas leakage detection device to manually scan an area in a chemical industry park, where hazardous gas is placed, when certain hazardous chemical gas leaks, a gas cloud enters the monitoring range of the device, due to the absorption characteristic of infrared rays, namely, the propagation loss is inconsistent between a normal atmospheric environment and an environment containing leaked gas, an infrared optical lens of the device can collect infrared radiation of gas with an absorption waveband matched with a response waveband of the infrared optical lens, and then the infrared optical lens passes through a band-pass filter with a specific waveband to select a radiation signal of target gas to be monitored to form a target infrared light signal;
the infrared detector 102 performs photoelectric conversion to convert the target infrared light signal into an electric signal, the analog-to-digital conversion module 105 transmits the electric signal to the processor module 30, and the electric signal is processed by the processor module 30 and then displayed on the display 51 in an imaging manner;
the operator can judge whether there is dangerous gas leakage according to the image displayed on the display 51, when judging that there is gas leakage, the operator triggers the visible light imaging module 20 to take a picture or record a video by operating the button provided by the one-key alarm module 45, and sends an alarm signal containing the positioning information and the shooting data of the positioning module 47 to the operation command center through the communication module 46.
In addition, these photographed data and positioning information may also be stored through the TF card 43 or the EMMC 44. And may also communicate with the operations command center through the communication module 46 via the speaker 41 and the MIC 42.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application.
Claims (8)
1. A portable gas leak detection device, comprising:
the infrared imaging module comprises an infrared optical lens, a filter and an infrared detector which are positioned on a light path;
a visible light imaging module;
the display module comprises a display and a touch screen driving module which are electrically connected with each other;
the processor module is electrically connected with the infrared imaging module, the visible light imaging module and the display module;
the peripheral module comprises a one-key alarm module which is electrically connected with the processor module;
the battery module supplies power to each module;
a housing including an imaging housing portion and a hand-held housing portion connected; the infrared imaging module, the visible light imaging module and the processor module are assembled inside the imaging shell; the battery module is assembled inside the hand-held housing part.
2. The portable gas leak detection apparatus according to claim 1, wherein the peripheral module further comprises a positioning module, the positioning module being electrically connected to the processor module.
3. The portable gas leak detection apparatus according to claim 1, wherein the peripheral module further comprises a communication module, the communication module being electrically connected to the processor module.
4. The portable gas leak detection apparatus according to claim 1, wherein the peripheral module further comprises a memory module, the memory module being electrically connected to the processor module.
5. The portable gas leak detection apparatus according to claim 1, wherein the infrared imaging module further comprises:
the separation blade driving module is electrically connected with the separation blade and the processor module respectively;
the TEC temperature control module is electrically connected with the infrared detector and the processor module;
and the analog-to-digital conversion module is electrically connected with the infrared detector and the processor module.
6. The portable gas leak detection apparatus according to claim 1, wherein the peripheral module further includes a speaker and a microphone, the speaker and the microphone being electrically connected to the processor module, respectively.
7. The portable gas leak detection device according to claim 1, wherein the display is disposed perpendicular to the imaging housing portion.
8. The portable gas leak detection device according to claim 7, wherein an operation panel is further provided at a connection of the imaging housing portion and the handheld housing portion, and the operation panel includes the one-key alarm module, a power switch key, a change-over switch, and a knob; the change-over switch and the knob are respectively electrically connected with the processor module.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504181A (en) * | 2021-08-04 | 2021-10-15 | 梁宵 | Gas cloud monitoring device and monitoring method based on Fourier infrared spectrum technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504181A (en) * | 2021-08-04 | 2021-10-15 | 梁宵 | Gas cloud monitoring device and monitoring method based on Fourier infrared spectrum technology |
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