CN115862274A - Multi-band radio frequency electromagnetic energy explosion-proof ignition test device and method - Google Patents
Multi-band radio frequency electromagnetic energy explosion-proof ignition test device and method Download PDFInfo
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- CN115862274A CN115862274A CN202310193900.1A CN202310193900A CN115862274A CN 115862274 A CN115862274 A CN 115862274A CN 202310193900 A CN202310193900 A CN 202310193900A CN 115862274 A CN115862274 A CN 115862274A
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Abstract
The invention discloses a multi-band radio frequency electromagnetic energy explosion-proof ignition test device and a method, and the device comprises an ignition test module, a power measurement circuit and an external radio frequency source module, wherein the ignition test module comprises a first dipole antenna metal tube, a metal disc, a driving motor, a second dipole antenna metal tube and a feed electrode, the second dipole antenna metal tube and the feed electrode are coaxially arranged on one side of the first dipole antenna metal tube, the external radio frequency source module supplies energy to the device, combustible gas is conveyed to a closed explosion cavity through a gas conveying pipe, the metal disc and the feed electrode are respectively and electrically connected with the first dipole antenna metal tube and the second dipole antenna metal tube after input is finished, the driving motor drives the metal disc to rotate through a driving guide rod, the metal disc and the feed electrode are in intermittent connection, explosive gas is ignited to explode, a signal source safety power threshold value is obtained, and the test efficiency is improved by replacing the first lengthening metal tube and the second lengthening metal tube to adapt to radio frequency power safety thresholds of different frequency bands of the external radio frequency source module.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a multi-band radio frequency electromagnetic energy explosion-proof ignition test device and method.
Background
The large bandwidth, low delay and wide connection of the 5G technology can solve the difficult data of large data synchronous transmission, remote real-time control and multi-sensor centralized access in intelligent mining under coal mines, oil platforms and the like, and is a technical basis for realizing the coordinated and efficient operation of intelligent systems. However, the electromagnetic wave is used and transmitted in the environment of inflammable and explosive gases such as methane, dust and the like, two factors of explosive gas and oxygen with certain concentration in three explosion factors are met, and when the energy released in a certain mode in the electromagnetic wave transmission process is larger than the minimum ignition energy, the environmental explosion is easily caused. With the popularization and application of the 5G technology in coal mines, unpredictable potential safety hazards are generated while the technical advantages of the radio frequency electromagnetic wave equipment are exerted, and the electromagnetic wave explosion prevention problem of high-power radio frequency source equipment such as base stations and the like is widely concerned.
In order to further provide communication bandwidth, frequencies of 5G communication technology are up to 3.5GHz, and besides 700MHz, 2.1GHz and 2.6GHz are also typical frequency bands of 5G communication. GB/T3836.1 GBT 3836.1-2021 explosive Environment part 1: the general requirements of equipment stipulate that the threshold power of class I explosive radio frequency signals does not exceed 6W, but the stipulated basis comes from tests developed for frequency bands below 10MHz, and test results are directly popularized to the frequency band of 9kHz-60GHz as standard basis. The frequency changes, so does the ease with which the spark is formed across the voltage breakdown gap, and the above generalization is not reasonable.
Using radio frequency equipment, such as 5G base stations and the like, in explosive locations, there is a possibility that radio frequency electromagnetic energy is coupled by metal conductors and released causing an explosion of the environment. When the metal conductor resonates with the electromagnetic wave, energy can be coupled; when the electrical state of the metal conductor is changed due to external physical factors (such as vibration) (such as electric sparks are easily generated when a common circuit switch is turned on and off), energy is easily released, it is worth mentioning that the release of the energy is closely related to the frequency of electromagnetic waves besides the electrical parameters of the metal conductor, generally speaking, radio frequency electromagnetic energy is related to the frequency of the electromagnetic waves when the metal conductor can be coupled, but because a common test device can only be coupled with a radio frequency source in a single frequency band in an inherent state, if the radio frequency sources in different frequency bands are tested in one test, a plurality of test devices with different parameter designs are required to be prepared for coupling matching, so that the test efficiency is reduced.
Disclosure of Invention
The embodiment of the invention provides an electromagnetic energy explosion-proof ignition test device which can be used for simulating a power safety threshold when a metal conductor is switched between a normal state and a short-circuit state, and can obtain the power safety thresholds of a radio frequency source module to be tested under different frequencies conveniently and quickly.
In a first aspect, the present application provides the following technical solutions through an embodiment:
the radio frequency electromagnetic energy explosion-proof ignition test device comprises an ignition test module, a power measuring circuit and an external radio frequency source module, wherein the ignition test module is connected with the power measuring circuit, and the external radio frequency source module is used for transmitting radio frequency signals to the ignition test module;
the ignition test module comprises a first dipole antenna metal tube, a metal disc, a driving motor, a second dipole antenna metal tube and a feed electrode; the second dipole antenna metal tube is coaxially arranged on one side of the first dipole antenna metal tube;
a first partition plate is sealed at one end of the first dipole antenna metal tube, a driving motor is arranged at the other end of the first dipole antenna metal tube, the output end of the driving motor is connected with a driving rod, the driving rod penetrates through and extends out of the first partition plate, and the metal disc is arranged at the output end of the driving rod;
a second partition plate is sealed at one end of the second dipole antenna metal tube, the second partition plate is arranged opposite to the first partition plate, and a gas pipe is arranged in the second dipole antenna metal tube and penetrates through the second partition plate;
the metal disc is provided with a gap along the circumference, and when the driving motor rotates the metal disc, the feed electrode is intermittently contacted with the metal disc;
a first flange is sleeved at the first end of the first dipole antenna metal tube, a second flange is sleeved at the first end of the second dipole antenna metal tube, a tube cover is connected between the first flange and the second flange, the first flange, the second flange, the tube cover, the first partition plate and the second partition plate form a closed explosion cavity, and a sensor for detecting explosion is arranged in the closed explosion cavity;
the feed electrode is arranged on the side wall of the second partition plate and is positioned in the closed explosion cavity;
the second end of the first dipole antenna metal tube is detachably connected with a first lengthened metal tube, and the second end of the second dipole antenna metal tube is detachably connected with a second lengthened metal tube.
In some embodiments, the external rf source module is connected to a protection circuit, an output end of the protection circuit is connected to a coaxial cable, an outer core of the coaxial cable is electrically connected to the second dipole antenna metal tube, an inner core of the coaxial cable is electrically connected to the first dipole antenna metal tube, and the first dipole antenna metal tube and the second dipole antenna metal tube serve as a transmitting antenna of the external rf source module;
when an electromagnetic energy explosion-proof test is carried out, the driving motor drives the metal disc to rotate relative to the feed electrode, so that the other end of the feed electrode is in intermittent contact with the surface of the metal disc, combustible gas is ignited after the output power of the external radio frequency source module reaches a threshold value, and the power measuring circuit is used for obtaining the output power of the external radio frequency source module as a safety energy threshold value when the sensor detects that explosion occurs in the closed explosion cavity.
In some embodiments, the external rf source module is a wireless rf source module, and the first dipole antenna metal tube and the second dipole antenna metal tube are used as receiving antennas of the wireless rf source module;
when an electromagnetic energy explosion-proof test is carried out, the driving motor drives the metal disc to rotate relative to the feed electrode, so that the other end of the feed electrode is intermittently contacted with the surface of the metal disc, combustible gas is ignited after the output power of the external radio frequency source module reaches a threshold value, and the power measuring circuit is used for obtaining the output power of the external radio frequency source module as a safety energy threshold value when the sensor detects that explosion occurs in the closed explosion cavity.
In some embodiments, the length of the feed electrode in the closed explosion cavity is greater than or equal to the distance between the second partition plate and the metal plate surface.
In some embodiments, the first dipole antenna metal tube is integrally formed with the first spacer and the second dipole antenna metal tube is integrally formed with the second spacer.
In some embodiments, the feed electrode is a tungsten wire and the metal disk is a cadmium disk.
In some embodiments, a flame stop valve is arranged at one end of the gas transmission pipe away from the closed explosion cavity.
In some embodiments, the tube cover is made of an explosion-proof transparent material.
In a second aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a multiband radio frequency electromagnetic energy explosion-proof ignition test method is characterized by being applied to any one test device provided by the first aspect, and the test method comprises the following steps:
s1, controlling combustible gas to be conveyed into the closed explosion cavity through the gas conveying pipe;
s2, controlling the metal disc to be electrically connected with the first dipole antenna metal tube, and controlling the feed electrode to be electrically connected with the second dipole antenna metal tube;
s3, controlling the driving motor to drive the metal disc to rotate through the driving rod, so that the metal disc is intermittently and electrically connected with the feed electrode;
s4, controlling an external radio frequency source module to output radio frequency signals with gradually increased power to the ignition test module based on set frequency, and when the sensor detects that the closed explosion cavity explodes, obtaining the output power of the external radio frequency source module as a safe energy threshold value of the external radio frequency source module under the set frequency;
s5, adjusting the set frequency of the radio frequency signal output by the external radio frequency source module, replacing the first lengthened metal pipe and the second lengthened metal pipe which are adaptive to the adjusted set frequency, repeating the steps S1-S4, and obtaining the safe energy threshold value of the external radio frequency source module under the adjusted set frequency.
In some embodiments, the controlling the external rf source module to output the rf signal with increasing power to the ignition test module based on the set frequency includes:
and taking the first dipole antenna metal tube and the second dipole antenna metal tube as transmitting antennas of radio frequency signals of the external radio frequency source module, and controlling the external radio frequency source module to output radio frequency signals with gradually increased power to the ignition test module through a coaxial cable based on set frequency.
In some embodiments, the controlling the external rf source module to output the rf signal with increasing power to the ignition test module based on the set frequency includes:
and taking the first dipole antenna metal tube and the second dipole antenna metal tube as receiving antennas of radio frequency signals of the external radio frequency source module, and controlling the external radio frequency source module to wirelessly transmit radio frequency signals with gradually increased power to the ignition test module based on set frequency.
One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:
according to the embodiment of the invention, the power measuring circuit and the external radio frequency source module are arranged on the ignition experiment module, explosive gas is input into the closed explosion cavity through the gas pipe, when the metal disc with the notch on the surface and electrically connected is driven by the driving motor to rotate relative to the electrically connected feeding electrode, the metal disc and the feeding electrode are in intermittent contact, so that intermittent electrical connection is generated between the metal disc and the feeding electrode, the power of a transmitting signal of the external radio frequency source module reaches a threshold value, and the explosive gas in the closed explosion cavity is ignited, so that the power safety threshold value of the external radio frequency source module can be tested, the power safety threshold values of the external radio frequency source module under the condition of outputting radio frequency signals of different frequency bands can be tested by replacing the first lengthening metal pipe and the second lengthening metal pipe, so that the power safety threshold values of the external radio frequency source module under the condition of outputting radio frequency signals of different frequency bands can be tested without preparing a plurality of test devices in one test process, and the test efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of the explosion-proof ignition test device of the multi-band radio frequency electromagnetic energy of the present invention;
FIG. 2 is a schematic structural diagram of an ignition test module according to the present invention;
FIG. 3 is a first connection diagram of the external RF source module according to the present invention;
FIG. 4 is a second connection diagram of the external RF source module according to the present invention;
FIG. 5 is a schematic diagram of the test method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Descriptions in this specification as relating to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any indicated technical feature or quantity. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
On one hand, referring to fig. 1 and fig. 2, the embodiment of the invention discloses a multiband radio frequency electromagnetic energy explosion-proof ignition test device, which comprises an ignition test module 1, a power measurement circuit 2 and an external radio frequency source module 3, wherein the ignition test module 1 is connected with the power measurement circuit 2, and the external radio frequency source module 3 is used for transmitting a radio frequency signal to the ignition test module 1;
the ignition test module 1 comprises a first dipole antenna metal tube 11, a metal disc 12, a second dipole antenna metal tube 13 and a feed electrode 14; the second dipole antenna metal tube 13 is coaxially arranged on one side of the first dipole antenna metal tube 11.
A first partition plate 111 is sealed at one end of the first dipole antenna metal tube 11, a driving motor 112 is arranged at the other end of the first dipole antenna metal tube 11, an output end of the driving motor 112 is connected with a driving rod 113, a driving rod 114 penetrates through and extends out of the first partition plate 111, and the metal disc 12 is vertically arranged at an output end of the driving rod 113;
a second partition plate 131 is sealed at one end of the second dipole antenna metal tube 13, the second partition plate 131 is opposite to the first partition plate 111, the feed electrode 14 is arranged outside the second partition plate 131, a gas pipe 132 is coaxially arranged in the second dipole antenna metal tube 13, and the gas pipe 132 penetrates through the second partition plate 131;
the metal disc 12 is provided with a gap 121 along the circumference, and when the driving motor 112 rotates the metal disc 12, the feed electrode 14 is intermittently contacted with the metal disc 12, wherein the gap 121 may be a through hole or a notch, and the gap 121 may be one or a plurality of gaps and is uniformly distributed along the circumference of the metal disc 12;
the first pot head of first dipole antenna tubular metal resonator 11 is equipped with first flange 114, and the first pot head of second dipole antenna tubular metal resonator 13 is equipped with second flange 133, is connected with pipe casing 15 between first flange 114 and the second flange 133, and the pipe casing 15 is inboard to constitute airtight explosion chamber 151, is provided with the sensor 152 that is used for detecting the explosion in the airtight explosion chamber 151, and wherein, sensor 152 can also be sound transducer for the shock sensor.
The second end of the first dipole antenna metal tube 11 is detachably connected with a first lengthened metal tube 115, and the second end of the second dipole antenna metal tube 13 is detachably connected with a second lengthened metal tube 134, optionally, the detachable connection mode may be a threaded connection, a bolt connection or a snap connection, for example, the first dipole antenna metal tube 11 and the second lengthened metal tube 115 may be connected by a first dipole antenna lengthening nut 116, and the second dipole antenna metal tube 13 and the second lengthened metal tube 135 may be connected by a second dipole antenna lengthening nut 134.
The gas pipe 132 is used for conveying explosive gas, which may be a mixture of air and hydrogen, ethylene, methane, and acetylene, to the closed explosion chamber 151.
The test device provided by the invention has the beneficial effects that: according to the embodiment of the invention, the power measuring circuit 2 and the external radio frequency source module 3 are arranged on the ignition experiment module, when the driving motor 112 drives the electrically connected metal disc 12 to rotate relative to the electrically connected feed electrode 14, the metal disc 12 and the feed electrode 14 are intermittently and electrically connected, the power of a transmitting signal of the external radio frequency source module 3 reaches a threshold value, and explosive gas in the sealed explosion cavity 151 is ignited, so that the power safety threshold value of the external radio frequency source module 3 can be tested, the first lengthened metal tube 115 and the second lengthened metal tube 135 are replaced to adapt to the signal frequency of the external radio frequency source module 3 with different frequency bands, so that the power safety threshold value of the external radio frequency source module under the condition of outputting radio frequency signals with different frequency bands can be tested without preparing a plurality of sets of testing devices in one testing process, and the testing efficiency is improved.
Research shows that in practical application scenarios, the danger generating process is as follows: the radio frequency source (the radio frequency source in the explosion-proof place is specially designed, and the safety of the radio frequency source is verified) emits electromagnetic waves, and the electromagnetic waves are coupled by a metal conductor in the environment (a certain resonance condition needs to be met, at the moment, the metal conductor plays a role of a receiving antenna, the coupled energy is related to the power of the radio frequency source, under the condition that other conditions are not changed, the larger the power of the radio frequency source is, the more the energy the metal conductor is coupled to is), in a certain process (for example, the metal conductor is vibrated or collided, and the like), the electromagnetic wave energy coupled by the metal conductor is released, and when the released energy exceeds a certain threshold value, explosive gas in the environment can be ignited. According to the reciprocity principle of the antenna, the receiving and transmitting antennas can be interchanged, and at the moment, a test device can be selected as a transmitting antenna to directly test, namely, the process of electromagnetic wave space propagation is skipped; the energy can be received in the space, which is closer to the actual scene, but because the transmission loss of the electromagnetic wave in the space is extremely large, the receiving antenna is adopted to receive the electromagnetic wave energy, a radio frequency source with higher power is needed, and the energy is wasted for laboratory tests.
Therefore, the invention can adopt the following two connection and verification modes of the external radio frequency source module 3.
In another alternative embodiment, referring to fig. 3, the external radio frequency source module 3 is connected to a protection circuit 31, an output end of the protection circuit 31 is connected to a coaxial cable, an outer core of the coaxial cable is electrically connected to the second dipole antenna metal tube 13, an inner core of the coaxial cable is electrically connected to the first dipole antenna metal tube 11, and the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 serve as transmitting antennas of the external radio frequency source module 3;
when an electromagnetic energy explosion-proof test is carried out, the input end of the power measuring circuit 2 is electrically connected with a radio frequency source, the driving motor 112 drives the metal disc 12 to rotate relative to the feed electrode 14, so that the other end of the feed electrode 14 is in intermittent contact with the surface of the metal disc 12, combustible gas is ignited after the output power of the external radio frequency source module 3 reaches a threshold value, the power measuring circuit 2 is used for obtaining the output power of the external radio frequency source module 3 as a safety energy threshold value when the sensor 152 detects that explosion occurs in the closed explosion cavity 151, it can be understood that a test device is used as a transmitting antenna to directly carry out a test, namely, the process of electromagnetic wave space propagation is skipped, most loss generated by electromagnetic wave transmission in space is avoided, that is, the external radio frequency source module 3 with lower power is adopted to carry out the test, in the working process, when the feed electrode 14 is located in a notch of the metal disc 12, the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 normally work, and when the feed electrode 14 is located in a non-notch of the metal disc 12, the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 normally work to simulate a short-circuit state.
In another alternative embodiment, referring to fig. 4, the external rf source module 3 is a wireless rf source module, and the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 are used as receiving antennas of the external rf source module 3;
when an electromagnetic energy explosion-proof test is carried out, the input end of the power measuring circuit 2 is electrically connected with the external radio frequency source module 3, the driving motor 112 drives the metal disc 12 to rotate relative to the feed electrode 14, so that the other end of the feed electrode 14 is intermittently contacted with the surface of the metal disc 12, the combustible gas is ignited after the output power of the external radio frequency source module 3 reaches a threshold value, the power measuring circuit 2 is used for obtaining the output power of the external radio frequency source module 3 as a safety energy threshold value when the sensor 152 detects that explosion occurs in the closed explosion cavity 151, and it can be understood that the ignition test device 1 is used as a receiving antenna to be provided with a wireless radio frequency source nearby for testing, and an electromagnetic wave space propagation mode is adopted, so that the wireless radio frequency source is closer to a real actual scene, and the obtained power safety threshold value is more accurate.
In another alternative embodiment, the length of the feeder 14 in the sealed explosion chamber 151 is equal to or greater than the distance between the second partition 131 and the plate surface of the metal disc 12, wherein if the notch 121 is a notch, the length of the feeder 14 in the sealed explosion chamber 151 should be less than the distance between the bottom of the notch and the second partition 131.
In another alternative embodiment, the first dipole antenna metal tube 11 is integrally formed with the first partition 111, and the second dipole antenna metal tube 13 is integrally formed with the second partition 131, it is understood that the power transmission efficiency can be maximized when the first dipole antenna metal tube 11 is integrally formed with the first partition 111, and the second dipole antenna metal tube 13 is integrally formed with the second partition 131.
In an alternative embodiment, the feed electrode 14 is tungsten wire and the metal disc 12 is a cadmium disc, it being understood that the feed electrode 14 is tungsten wire and the metal disc 12 is cadmium disc, such combination being proven to provide the highest sparking efficiency.
In another alternative embodiment, the end of the air delivery conduit 132 remote from the sealed explosion chamber 151 is provided with a flame stop valve 1321, it being understood that the flame stop valve 1321 is configured to close the air delivery conduit 132 after the gas has been vented to prevent an explosion flame from escaping.
In another alternative embodiment, the first flange 114 is connected with the second flange 133 through the insulating bolts 16, the length of the pipe cover 15 and the length of the insulating bolts 16 have several different sizes, and it can be understood that the distance between the first flange 114 and the second flange 133 can be adjusted by replacing the pipe cover 15 with different lengths, so that the gap and the length can be adjusted to adjust the impedance matching state.
In another alternative embodiment, the tube cover 15 is made of explosion-proof transparent material, such as explosion-proof glass or acrylic material.
In a second aspect, in another alternative embodiment, referring to fig. 5, there is provided a method for explosion-proof ignition test of multiband radio frequency electromagnetic energy, comprising the following steps:
s1, controlling combustible gas to be conveyed into the closed explosion cavity 151 through the gas conveying pipe 132;
s2, controlling the metal disc 12 to be electrically connected with the first dipole antenna metal tube 11, and controlling the feed electrode 14 to be electrically connected with the second dipole antenna metal tube 13;
s3, controlling the driving motor 112 to drive the metal disc 12 to rotate through the driving rod 113, so that the metal disc 12 is intermittently and electrically connected with the feeding electrode 14;
s4, controlling the external radio frequency source module 3 to output radio frequency signals with gradually increased power to the ignition test module 1 based on a set frequency, and when the sensor 152 detects that the closed explosion cavity 151 explodes, obtaining the output power of the external radio frequency source module 3 as a safe energy threshold of the external radio frequency source module 3 at the set frequency;
s5, adjusting the set frequency of the radio frequency signal output by the external radio frequency source module 3, replacing the first lengthened metal pipe 115 and the second lengthened metal pipe 135 which are adaptive to the adjusted set frequency, repeating the steps S1-S4, and obtaining the safe energy threshold value of the external radio frequency source module 3 under the adjusted set frequency.
The beneficial effects of the test method provided by this embodiment are the same as those of the embodiment of the first aspect, and reference may be made to the contents of the embodiment of the first aspect for explanation.
In another alternative embodiment, the controlling external rf source module 3 outputs an rf signal with increasing power to the ignition test module 1 based on a set frequency, including:
the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 are used as transmitting antennas of radio frequency signals of the external radio frequency source module 3, the radio frequency source module 3 is controlled to output radio frequency signals with gradually increased power to the ignition test module 1 through the coaxial cable based on set frequency, and it can be understood that the ignition test device 1 is used as a transmitting antenna to directly perform a test, namely, the process of electromagnetic wave space propagation is skipped, most loss generated by electromagnetic wave transmission in space is avoided, and the external radio frequency source module 3 with lower power can be used for testing.
In another alternative embodiment, the controlling external rf source module 3 outputs an rf signal with increasing power to the ignition test module 1 based on a set frequency, including:
the first dipole antenna metal tube 11 and the second dipole antenna metal tube 13 are used as receiving antennas of radio frequency signals of the external radio frequency source module 3, the external radio frequency source module 3 is controlled to transmit radio frequency signals with gradually increased power to the ignition test module 1 based on set frequency, it can be understood that the ignition test device 1 is used as a receiving antenna to set a wireless radio frequency source nearby for testing, a mode of electromagnetic wave space propagation is adopted, the actual scene is closer to, and the obtained power safety threshold value is more accurate.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard-wired, or a combination of any of these, further, the functional units may be integrated in one processing unit, or each unit may exist physically separately, or two or more units may be integrated in one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, units or modules, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (11)
1. The radio frequency electromagnetic energy explosion-proof ignition test device is characterized by comprising an ignition test module, a power measuring circuit and an external radio frequency source module, wherein the ignition test module is connected with the power measuring circuit, and the external radio frequency source module is used for transmitting radio frequency signals to the ignition test module;
the ignition test module comprises a first dipole antenna metal tube, a metal disc, a driving motor, a second dipole antenna metal tube and a feed electrode; the second dipole antenna metal tube is coaxially arranged on one side of the first dipole antenna metal tube;
a first partition plate is sealed at one end of the first dipole antenna metal tube, a driving motor is arranged at the other end of the first dipole antenna metal tube, the output end of the driving motor is connected with a driving rod, the driving rod penetrates through and extends out of the first partition plate, and the metal disc is arranged at the output end of the driving rod;
a second partition plate is sealed at one end of the second dipole antenna metal tube, the second partition plate is arranged opposite to the first partition plate, and a gas conveying pipe is arranged in the second dipole antenna metal tube and penetrates through the second partition plate;
the metal disc is provided with a gap along the circumference, and when the driving motor rotates the metal disc, the feed electrode is intermittently contacted with the metal disc;
a first flange is sleeved at the first end of the first dipole antenna metal tube, a second flange is sleeved at the first end of the second dipole antenna metal tube, a tube cover is connected between the first flange and the second flange, the first flange, the second flange, the tube cover, the first partition plate and the second partition plate form a closed explosion cavity, and a sensor for detecting explosion is arranged in the closed explosion cavity;
the feed electrode is arranged on the side wall of the second partition plate and is positioned in the closed explosion cavity;
the second end of the first dipole antenna metal tube is detachably connected with a first lengthened metal tube, and the second end of the second dipole antenna metal tube is detachably connected with a second lengthened metal tube.
2. The ignition test device according to claim 1, wherein a protection circuit is connected to the external radio frequency source module, a coaxial cable is connected to an output end of the protection circuit, an outer core of the coaxial cable is electrically connected to the second dipole antenna metal tube, an inner core of the coaxial cable is electrically connected to the first dipole antenna metal tube, and the first dipole antenna metal tube and the second dipole antenna metal tube serve as transmitting antennas of the external radio frequency source module;
when an electromagnetic energy explosion-proof test is carried out, the driving motor drives the metal disc to rotate relative to the feed electrode, so that the other end of the feed electrode is in intermittent contact with the surface of the metal disc, combustible gas is ignited after the output power of the external radio frequency source module reaches a threshold value, and the power measuring circuit is used for obtaining the output power of the external radio frequency source module as a safety energy threshold value when the sensor detects that explosion occurs in the closed explosion cavity.
3. The ignition test device of claim 1, wherein the external radio frequency source module is a wireless radio frequency source module, and the first dipole antenna metal tube and the second dipole antenna metal tube are used as receiving antennas of the wireless radio frequency source module;
when an electromagnetic energy explosion-proof test is carried out, the driving motor drives the metal disc to rotate relative to the feed electrode, so that the other end of the feed electrode is intermittently contacted with the surface of the metal disc, combustible gas is ignited after the output power of the external radio frequency source module reaches a threshold value, and the power measuring circuit is used for obtaining the output power of the external radio frequency source module as a safety energy threshold value when the sensor detects that explosion occurs in the closed explosion cavity.
4. The ignition test apparatus of claim 1, wherein the length of the feed electrode in the closed explosion chamber is greater than or equal to the distance between the second partition plate and the surface of the metal plate.
5. The ignition test apparatus of claim 1, wherein the first dipole antenna metal tube is integrally formed with the first spacer, and the second dipole antenna metal tube is integrally formed with the second spacer.
6. The ignition test apparatus of claim 1, wherein the feed electrode is a tungsten wire and the metal disk is a cadmium disk.
7. The ignition test device of claim 1, wherein a flame stop valve is arranged at one end of the gas transmission pipe away from the closed explosion cavity.
8. The testing device of claim 1, wherein the tube housing is made of an explosion-proof transparent material.
9. A multiband radio frequency electromagnetic energy explosion-proof ignition test method applied to the test apparatus according to any one of claims 1 to 8, the test method comprising:
s1, controlling combustible gas to be conveyed into the closed explosion cavity through the gas conveying pipe;
s2, controlling the metal disc to be electrically connected with the first dipole antenna metal tube, and controlling the feed electrode to be electrically connected with the second dipole antenna metal tube;
s3, controlling the driving motor to drive the metal disc to rotate through the driving rod, so that the metal disc is intermittently and electrically connected with the feed electrode;
s4, controlling an external radio frequency source module to output radio frequency signals with gradually increased power to the ignition test module based on set frequency, and when the sensor detects that the closed explosion cavity explodes, obtaining the output power of the external radio frequency source module as a safe energy threshold value of the external radio frequency source module under the set frequency;
s5, adjusting the set frequency of the radio frequency signal output by the external radio frequency source module, replacing the first lengthened metal pipe and the second lengthened metal pipe which are adaptive to the adjusted set frequency, repeating the steps S1-S4, and obtaining the safe energy threshold value of the external radio frequency source module under the adjusted set frequency.
10. The method of claim 9, wherein the controlling the external rf source module to output the rf signal with increasing power to the ignition test module based on a set frequency comprises:
and taking the first dipole antenna metal tube and the second dipole antenna metal tube as transmitting antennas of radio-frequency signals of the external radio-frequency source module, and controlling the external radio-frequency source module to output radio-frequency signals with gradually increased power to the ignition test module through a coaxial cable based on the set frequency.
11. The method of claim 9, wherein the controlling the external rf source module to output the rf signal with increasing power to the ignition test module based on a set frequency comprises:
and taking the first dipole antenna metal tube and the second dipole antenna metal tube as receiving antennas of radio frequency signals of the external radio frequency source module, and controlling the external radio frequency source module to wirelessly transmit radio frequency signals with gradually increased power to the ignition test module based on the set frequency.
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Cited By (1)
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| CN116707665A (en) * | 2023-08-08 | 2023-09-05 | 安标国家矿用产品安全标志中心有限公司 | Radio frequency electromagnetic energy explosion test device and method |
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| CN115862274B (en) | 2023-05-16 |
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