CN113720845A - Performance test system and method for open type laser/infrared gas monitoring instrument - Google Patents
Performance test system and method for open type laser/infrared gas monitoring instrument Download PDFInfo
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Abstract
The invention provides a performance test system and a test method for an open laser/infrared gas monitoring instrument, which comprises a dynamic performance test device, an interference gas chamber, a conventional gas chamber, a gas supply device for supplying gas to the dynamic performance test device, the interference gas chamber and the conventional gas chamber, a console for measuring data display and gas path control, and a track respectively connected with the dynamic performance test device, the interference gas chamber and the conventional gas chamber in a sliding manner.
Description
Technical Field
The invention relates to the technical field of performance detection of laser sensors, in particular to a performance test system and a performance test method of an open type laser/infrared gas monitoring instrument.
Background
Laser sensors are new measuring instruments developed in recent years, and detection and inspection means for such sensors are not mature at present. The gas sensor calibrating device on the current market cannot effectively measure the comprehensive performance of the laser/infrared gas concentration measuring sensor.
The invention patent with the application number of CN202010656579.2 discloses a multistage transient dynamic performance measuring device of a laser gas concentration measuring sensor. The measuring device comprises a measuring part in a hollow cylinder structure, wherein one end of the measuring part is plugged by a transparent material, the other end of the measuring part is plugged by a transparent or non-transparent material, and the inside of the measuring part is longitudinally divided into a plurality of closed air chambers by partition plates; and each air chamber is filled with gases with different concentrations or different types; the laser sensor to be measured is arranged at the transparent material plugging end of the measuring part; the measuring part rotates along the central axis, and the laser sensor sends laser beams to the air chambers to measure the concentration of the gas in different air chambers.
However, the above measuring device has a technical drawback that the performance index of the calibration of the laser gas concentration measuring sensor cannot be determined effectively due to the fact that the measuring device cannot effectively and truly simulate environmental test interference conditions such as environmental interference factors and perform detection analysis on the environmental test interference conditions.
Accordingly, there is a need for an improved performance testing system and method for an open laser/infrared gas monitoring instrument to solve the above problems.
Disclosure of Invention
The invention aims to provide a performance test system and a performance test method for an open type laser/infrared gas monitoring instrument.
In order to achieve the above object, the present invention provides a performance testing system for an open laser/infrared gas monitoring instrument, which comprises a dynamic performance testing device, an interference gas chamber, a conventional gas chamber, a gas supply device for supplying gas to the dynamic performance testing device, the interference gas chamber and the conventional gas chamber, a console for measuring data display and gas circuit control, and a track respectively connected with the dynamic performance testing device, the interference gas chamber and the conventional gas chamber in a sliding manner;
the interference air chamber comprises an interference air chamber cavity, transparent plugging pieces arranged at two ends of the interference air chamber cavity and a speed-adjustable fan arranged at the bottom of the cavity of the interference air chamber cavity;
the performance test system of the open type laser/infrared gas monitoring instrument detects dynamic measurement data, interference measurement data and conventional measurement data of the laser/infrared gas monitoring instrument to be tested through three gas chamber structures of the dynamic performance test device, the interference gas chamber and the conventional gas chamber, integrates the three measurement data, and corrects the test data of the laser/infrared gas monitoring instrument to be tested.
As a further improvement of the present invention, the interference air chamber further comprises an interference air chamber air inlet and an interference air chamber air outlet which are arranged on the outer peripheral wall of the interference air chamber cavity.
As a further improvement of the present invention, the conventional air chamber is disposed between the dynamic performance testing device and the interference air chamber; the conventional air chamber comprises a conventional air chamber cavity, transparent parts arranged at two ends of the conventional air chamber cavity, and a conventional air chamber air inlet and a conventional air chamber air outlet which are respectively arranged on the peripheral wall of the conventional air chamber cavity.
As a further improvement of the invention, the dynamic performance testing device is a single-cavity air chamber with a cylindrical structure; the single-cavity air chamber comprises a first accommodating cavity, a light screen and a first driving device, wherein the first accommodating cavity is arranged in the single-cavity air chamber and used for accommodating gas to be detected, the light screen is arranged at the front end of the single-cavity air chamber, and the first driving device is electrically connected with the light screen and used for dragging the light screen to rotate at a high speed.
As a further improvement of the invention, the shading plate is provided with a light hole; the single-cavity air chamber further comprises a first air outlet and a first air inlet which are respectively arranged on the peripheral side wall of the single-cavity air chamber.
As a further improvement of the invention, the dynamic performance testing device is a multi-cavity air chamber with a cylindrical structure; the multi-cavity air chamber comprises a plurality of air chamber units which are arranged independently, a transmission device in transmission connection with the air chamber units and a second driving device which is electrically connected with the transmission device and used for driving the air chamber units to rotate at a high speed.
As a further improvement of the invention, the multi-cavity air chamber further comprises a bracket fixedly arranged on the track and connected with the track in a sliding manner; the bracket comprises a sliding block in sliding connection with the track and a rotating wheel in rolling connection with the cylinder body of the multi-cavity air chamber.
As a further improvement of the invention, the air chamber unit comprises a second accommodating cavity arranged in the air chamber unit and used for accommodating the gas to be measured, and transparent pieces which are respectively arranged at two ends of the second accommodating cavity and used for plugging.
In order to achieve the above object, the present invention further provides a performance testing method for an open laser/infrared gas monitoring instrument, the performance testing system for the open laser/infrared gas monitoring instrument is adopted for testing, and when the dynamic performance testing device adopts a single-cavity gas chamber, the method comprises the following steps:
s1, firstly, under the regulation and control of a console, the gas supply device supplies gas to the dynamic performance testing device, the interference gas chamber and the conventional gas chamber, and the first containing cavity of the single-cavity gas chamber is filled with gas to be tested with preset concentration and types; the method comprises the following steps of filling gas to be detected with preset concentration and types into a cavity of an interference gas chamber, then filling coal powder into the interference gas chamber, and adjusting the rotating speed of a speed-adjustable fan to enable the coal powder to float for simulating an underground dust environment; the conventional gas chamber is filled with gas to be measured with preset concentration and type; mounting the laser/infrared gas monitoring instrument to be tested on the track through an instrument mounting bracket, and adjusting the test distances between the laser/infrared gas monitoring instrument to be tested and the dynamic performance testing device, the interference gas chamber and the conventional gas chamber respectively in a sliding manner;
s2, when the dynamic performance testing device is used for testing, the front end of the single-cavity air chamber is provided with a light shielding plate, a light hole is formed in the light shielding plate, the light shielding plate is driven to rotate at a high speed by starting the first driving device, so that the time of laser penetrating through the single-cavity air chamber is controlled, the response time of a laser gas monitoring instrument to be tested is further measured, generally, the time of measuring the display value to reach 90% of the actual concentration of the gas to be tested is measured, and dynamic measurement data are displayed on the interface of a control console;
s3, when an interference air chamber is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent plugging piece at one end of the interference air chamber for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on an interface of a console;
s4, when a conventional air chamber is used for testing, the laser/infrared gas monitoring instrument to be tested is placed in front of a transparent part at one end of the conventional air chamber for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on an interface of a console;
and S5, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
In order to achieve the above object, the present invention further provides a performance testing method for an open laser/infrared gas monitoring instrument, the performance testing system for the open laser/infrared gas monitoring instrument is adopted to perform testing, and when the dynamic performance testing device is a multi-cavity gas chamber, the method includes the following steps:
a1, firstly, under the control of a console, the gas supply device supplies gas to the dynamic performance testing device, the interference gas chamber and the conventional gas chamber, the multi-chamber gas chamber is composed of a plurality of independent gas chamber units, and a second containing cavity of each gas chamber unit is filled with a predetermined concentration of a predetermined kind of gas to be tested; the method comprises the following steps of filling gas to be detected with preset concentration and types into a cavity of an interference gas chamber, then filling coal powder into the interference gas chamber, and adjusting the rotating speed of a speed-adjustable fan to enable the coal powder to float for simulating an underground dust environment; the conventional gas chamber is filled with gas to be measured with preset concentration and type; mounting the laser/infrared gas monitoring instrument to be tested on the track through an instrument mounting bracket, and adjusting the test distances between the laser/infrared gas monitoring instrument to be tested and the dynamic performance testing device, the interference gas chamber and the conventional gas chamber respectively in a sliding manner;
a2, driving the transmission device to move through a second driving device, and further driving the multi-cavity air chamber to rotate at a high speed through the transmission device, so that the laser beam passes through each air chamber unit according to a set time;
a3, the rotating speed of the multi-cavity air chamber can be controlled by controlling the rotating speed of the second driving device, and the time t that the laser beam of the laser/infrared gas monitoring instrument to be tested passes through the air chamber can be controlled by the rotating speed v of the multi-cavity air chamber barrel-shaped devicemaAnd calculating the effective length l of the test window to obtain:
t＝l/vma；
the multi-stage and multi-precision control of the rotating speed of the multi-cavity air chamber cylindrical device is realized by controlling the second driving device and feeding back the measured data, so that the time of a laser beam of the laser/infrared gas monitoring instrument to be tested passing through the air chamber is changed according to the control requirement, and the dynamic measured data is displayed on the interface of the console;
a4, when an interference air chamber is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent plugging piece at one end of the interference air chamber for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on an interface of a console;
a5, when a conventional air chamber is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent part at one end of the conventional air chamber for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on an interface of a console;
and A6, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
The invention has the beneficial effects that:
1. the invention provides a performance test system of an open type laser/infrared gas monitoring instrument, which is used for meeting the detection, inspection and calibration requirements of laser/infrared gas concentration measuring instruments on the market, simulating an underground dust environment by setting a structure of an interference gas chamber by utilizing the working principle of the laser measuring instrument, and controlling the response time of a laser to test the instrument to be tested through the contact time of the laser and gas in the simulated environment; meanwhile, the test system can also simulate the environment of various gas types or various concentrated gas degrees, and the simulated environment is switched by utilizing the principle of multistage and multi-precision transient control, so that the test on the multistage transient dynamic performance of a laser measuring instrument (a laser/infrared gas monitoring instrument) is realized.
2. The performance test system of the open type laser/infrared gas monitoring instrument provided by the invention is based on the working principles of different types of laser measuring instruments, adopts an open type detection mode, and determines the performance index of the type of laser measuring instrument verification by truly simulating environmental test interference conditions such as environmental interference factors and the like and detecting and analyzing the environmental test interference conditions; the test system is suitable for performance test of laser measuring instruments such as laser methane monitoring instruments, has wide applicability, is accurate in measured data, and has huge application value and popularization prospect.
3. The performance test system of the open laser/infrared gas monitoring instrument provided by the invention detects dynamic measurement data, interference measurement data and conventional measurement data of the laser/infrared gas monitoring instrument to be tested by arranging three gas chamber structures of the dynamic performance test device, the interference gas chamber and the conventional gas chamber, comprehensively compares the three measurement data with actual gas supply concentration and gas supply type data of the gas supply device, corrects the test data of the laser/infrared gas monitoring instrument to be tested, and has high correction precision.
4. The performance test method of the open type laser/infrared gas monitoring instrument provided by the invention adopts an open type detection mode, is suitable for the performance test of laser measuring instruments such as a laser methane monitoring instrument and the like by truly simulating environmental test interference conditions such as environmental interference factors and the like and detecting and analyzing the environmental test interference conditions, has wide applicability and accurate measurement data, and has huge application value and popularization prospect.
Drawings
Fig. 1 is a schematic structural diagram of a performance testing system of an open laser/infrared gas monitoring instrument provided by the invention.
FIG. 2 is a schematic structural diagram of a single-chamber air chamber of the dynamic performance testing apparatus provided by the present invention.
FIG. 3 is a schematic structural diagram of a multi-chamber air chamber of the dynamic performance testing apparatus provided by the present invention.
FIG. 4 is a schematic structural diagram of a multi-chamber air chamber of the dynamic performance testing apparatus provided by the present invention.
Fig. 5 is a schematic structural diagram of an interference gas chamber provided by the present invention.
Fig. 6 is a diagram of a console and an open laser/infrared gas monitoring instrument performance test system according to the present invention.
FIG. 7 is a diagram of a single chamber of a dynamic performance testing apparatus according to the present invention.
FIG. 8 is a pictorial view of an interference gas cell provided by the present invention.
FIG. 9 is a schematic diagram of an embodiment of a disturbed air chamber speed-adjustable fan according to the present invention.
FIG. 10 is a model view of a conventional gas cell provided by the present invention.
Fig. 11 is a real object diagram of the track provided by the present invention.
Reference numerals
10. 10' -a dynamic performance testing device; 101-a first air outlet; 102-a first air inlet; 11-a visor; 12-a first drive; 13-light-transmitting holes; 14-a gas cell unit; 141-a second outlet; 142-a second air inlet; 141-a transparent member; 15-a transmission; 16-a second drive; 17-a scaffold; 171-a slide; 172-wheel; 20-an interference gas chamber; 21-interference air chamber cavity; 22-a transparent closure; 23-interference air chamber air inlet; 24-interference air chamber air outlet; 30-a conventional gas chamber; 40-track.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the present invention provides a performance testing system for an open laser/infrared gas monitoring instrument, which includes a dynamic performance testing apparatus 10, an interference gas chamber 20, a normal gas chamber 30, a gas supply apparatus (not shown in the figure) for supplying gas to the dynamic performance testing apparatus 10, the interference gas chamber 20, and the normal gas chamber 30, a console for displaying measurement data and controlling a gas path, and a rail 40 slidably connected to the dynamic performance testing apparatus 10, the interference gas chamber 20, and the normal gas chamber 30, respectively, and for adjusting a testing distance.
The performance test system of the open type laser/infrared gas monitoring instrument detects dynamic measurement data, interference measurement data and conventional measurement data of the laser/infrared gas monitoring instrument to be tested through three gas chamber structures of the dynamic performance test device 10, the interference gas chamber 20 and the conventional gas chamber 30, integrates the three measurement data, and corrects the test data of the laser/infrared gas monitoring instrument to be tested.
Referring to fig. 2 and 7, the dynamic performance testing apparatus 10 is a single-chamber air chamber with a cylindrical structure. The single-cavity air chamber comprises a first accommodating cavity (not marked in the figure) which is arranged in the single-cavity air chamber and used for accommodating gas to be detected, a light shielding plate 11 arranged at the front end of the single-cavity air chamber, and a first driving device 12 which is electrically connected with the light shielding plate 11 and used for dragging the light shielding plate 11 to rotate at a high speed. The light screen 11 is provided with a light hole 13. The single-cavity gas chamber further comprises a first gas outlet 101 and a first gas inlet 102 which are respectively arranged on the outer peripheral side wall of the single-cavity gas chamber, and the first gas inlet 102 and the second gas outlet 101 are connected with a ball valve and a quick connector (not shown in the figure) and used for configuring gas to be detected with preset concentration and types to the single-cavity gas chamber.
In another embodiment, referring to FIG. 3, the dynamic performance testing apparatus 10' is a multi-chamber plenum of cylindrical configuration. The multi-cavity air chamber comprises a plurality of air chamber units 14 which are arranged independently, a transmission device 15 in transmission connection with the air chamber units 14, a second driving device 16 which is electrically connected with the transmission device 15 and used for driving the air chamber units 14 to rotate at a high speed, and a bracket 17 which is fixedly arranged on the rail 40 and is in sliding connection with the rail 40.
The air chamber unit 14 includes a second accommodating cavity disposed inside thereof and used for accommodating the gas to be measured, transparent members 143 respectively mounted at two ends thereof and used for plugging, and a second air outlet 141 and a second air inlet 142 respectively disposed on outer peripheral sidewalls thereof.
Referring to fig. 4, the bracket 17 includes a sliding block 171 connected with the track 40 in a sliding manner and a rotating wheel 172 connected with the cylinder of the multi-chamber air chamber in a rolling manner; the circumferential surface of the cylindrical sidewall of the multi-chamber in contact with the runner 172 is provided with a groove (not labeled) in which the runner 172 is located, and the groove guides the runner 172, that is, the runner 172 rotates along the groove.
Specifically, both ends of the air cell unit 14 are sealed by specially processed glass transparent pieces 143, each air cell unit 14 is provided with 2 holes for air inlet/outlet, and the second air inlet 142 and the second air outlet 141 are connected with a ball valve and a quick coupling (not shown in the figure) for configuring the air cell unit 14 with the gas to be measured at a predetermined concentration.
The transmission 15 is a drive belt. The cylindrical side wall of the multi-cavity air chamber is supported and fixed by a bracket 17; a circle of driven gears (not shown in the figure) surrounding the circumference of the outer wall of the multi-cavity air chamber is arranged in the middle of the cylindrical side wall of the multi-cavity air chamber, and the driven gears are matched with a driving gear (not shown in the figure) of the second motor 16 to realize high-speed rotation of the multi-cavity air chamber cylindrical device through the transmission action of a driving belt.
Referring to fig. 5 and fig. 8-9, the disturbing air chamber 20 includes a disturbing air chamber cavity 21, transparent blocking pieces 22 disposed at two ends of the disturbing air chamber cavity 21, and a speed-adjustable fan (not shown) disposed at the bottom of the disturbing air chamber cavity 21. The interference air chamber 20 further comprises an interference air chamber air inlet 23 and an interference air chamber air outlet 24 which are arranged on the outer peripheral wall of the interference air chamber cavity 21. The underground dust environment is simulated by regulating and controlling the rotating speed of the speed-adjustable fan.
Referring to fig. 1 and 10, the conventional air chamber 30 is disposed between the dynamic performance testing apparatus 10 and the interference air chamber 20; the conventional air cell 30 includes a conventional air cell chamber, transparent portions disposed at both ends thereof, and a conventional air cell inlet port and a conventional air cell outlet port (not labeled in the drawings) respectively disposed on an outer peripheral wall of the conventional air cell chamber.
Fig. 6 to 11 show real/model diagrams of the performance testing system of the open laser/infrared gas monitoring instrument according to the present invention. The dynamic performance testing device 10/10', the interference air chamber 20 and the conventional air chamber 30 are respectively fixed on the rail 40 through sliding supports, the type of the air chamber is selected, the laser/infrared gas monitoring instrument to be tested is mounted on the rail 40 through an instrument mounting support (not shown in the figure), and the laser/infrared gas monitoring instrument to be tested freely slides along the rail 40, so that the testing distance between the laser/infrared gas monitoring instrument to be tested and the air chamber is adjusted, and is generally about 2 m.
Example 1
The embodiment 1 of the invention provides a performance test method of an open laser/infrared gas monitoring instrument, which adopts the performance test system of the open laser/infrared gas monitoring instrument to test, and when the dynamic performance test device adopts a single-cavity gas chamber, the method comprises the following steps:
s1, firstly, under the control of the console, the gas supply device supplies gas to the dynamic performance testing device 10, the interference gas chamber 20, and the normal gas chamber 30, and the first accommodating chamber of the single-chamber gas chamber is filled with a predetermined concentration of a predetermined kind of gas to be tested; the interference air chamber cavity 21 is filled with gas to be measured with preset concentration and types, pulverized coal is filled in the interference air chamber 20, and the rotating speed of the speed-adjustable fan is adjusted to enable the pulverized coal to float for simulating an underground dust environment; the conventional gas chamber 30 is filled with gas to be measured with preset concentration and type; mounting the laser/infrared gas monitoring instrument to be tested on the rail 40 through an instrument mounting bracket, and adjusting the test distance between the laser/infrared gas monitoring instrument to be tested and the dynamic performance testing device 10, the interference air chamber 20 and the conventional air chamber 30 in a sliding manner;
s2, when the dynamic performance testing device 10 is used for testing, the front end of the single-cavity air chamber is provided with a light shielding plate 11, a light transmitting hole 13 is formed in the light shielding plate 11, the light shielding plate 11 is driven to rotate at a high speed by starting a first driving device 12, so that the time of laser penetrating through the single-cavity air chamber is controlled, the response time of a laser gas monitoring instrument to be tested is further measured, generally, the time of measuring the display value to reach 90% of the actual concentration of the gas to be tested is measured, and dynamic measurement data are displayed on the interface of a control console;
s3, when the interference gas chamber 20 is used for testing, the laser/infrared gas monitoring instrument to be tested is placed in front of the transparent plugging piece 22 at one end of the interference gas chamber 20 for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on the interface of the console;
s4, when the conventional gas chamber 30 is used for testing, the laser/infrared gas monitoring instrument to be tested is placed in front of the transparent part at one end of the conventional gas chamber 30 for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on the interface of the console;
and S5, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
Example 2
The embodiment 2 of the invention provides a performance test method for an open laser/infrared gas monitoring instrument, which adopts the performance test system for the open laser/infrared gas monitoring instrument to test, and when the dynamic performance test device is a multi-cavity gas chamber, the method comprises the following steps:
a1, firstly, under the control of a console, the gas supply device supplies gas to the dynamic performance testing device 10, the interference gas chamber 20 and the conventional gas chamber 30, the multi-chamber gas chamber is composed of a plurality of independent gas chamber units 14, and a second accommodating chamber of each gas chamber unit 14 is filled with a predetermined concentration of a predetermined kind of gas to be tested; the interference air chamber cavity 21 is filled with gas to be measured with preset concentration and types, pulverized coal is filled in the interference air chamber 20, and the rotating speed of the speed-adjustable fan is adjusted to enable the pulverized coal to float for simulating an underground dust environment; the conventional gas chamber 30 is filled with gas to be measured with preset concentration and type; mounting the laser/infrared gas monitoring instrument to be tested on the rail 40 through an instrument mounting bracket, and adjusting the test distance between the laser/infrared gas monitoring instrument to be tested and the dynamic performance testing device 10, the interference air chamber 20 and the conventional air chamber 30 in a sliding manner;
a2, driving the transmission device 15 to move through the second driving device 16, and further driving the transmission device 15 to rotate the multi-cavity air chamber at a high speed, so that the laser beam passes through each air chamber unit 14 according to a set time; it is assumed that four kinds of the same gas of different concentrations are contained in the four gas cell units 14, respectively, and the switching time between the laser beams passing through the different gas cell units 14 is extremely short. According to the principle, the multi-stage transient dynamic performance of the laser/infrared gas monitoring and sensing instrument to be measured can be measured, namely, the shortest time consumed by the measured value of the tested sensor to reach 90% of the actual value of the gas concentration in the switched cavity when the tested sensor is switched from the test gas with one concentration to the similar test gas with the other concentration in a very short time;
a3, the rotating speed of the multi-cavity air chamber can be controlled by controlling the rotating speed of the second driving device 16, the rotating speed is measured by a photoelectric rotating speed sensor (not shown in the figure), and the time t that the laser beam of the laser/infrared gas monitoring instrument to be tested passes through the air chamber can be controlled by the rotating speed v of the multi-cavity air chamber barrel-shaped devicemaAnd calculating the effective length l of the test window to obtain:
t＝l/vma。
the multi-stage multi-precision control of the rotating speed of the multi-cavity air chamber cylindrical device is realized by controlling the second driving device 16 and feeding back the measurement data of the photoelectric rotating speed sensor, so that the time of a laser beam of the laser/infrared gas monitoring instrument to be tested passing through the air chamber is changed according to the control requirement, and the dynamic measurement data is displayed on the interface of the console;
a4, when the interference gas chamber 20 is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of the transparent plugging piece 22 at one end of the interference gas chamber 20 for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on an interface of a console;
a5, when the conventional gas chamber 30 is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent part at one end of the conventional gas chamber 30 for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on an interface of a console;
and A6, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
In summary, the present invention provides a performance testing system and a testing method for an open laser/infrared gas monitoring instrument, which includes a dynamic performance testing device, an interference gas chamber, a gas supply device for supplying gas to the dynamic performance testing device and the interference gas chamber, a control device electrically connected to the dynamic performance testing device and the interference gas chamber respectively and used for measuring data display and gas path control, and a track slidably connected to the dynamic performance testing device, the interference gas chamber and a mounting support frame of the laser/infrared gas monitoring instrument to be tested respectively and used for adjusting a testing distance. The testing method utilizes the working principle of a laser measuring instrument, and controls the response time of the laser to test the instrument to be tested through the contact time of the laser and gas in a simulated environment by simulating the underground environment; meanwhile, the test system can also simulate various gas environments, and the simulated environments are switched by utilizing the principle of multi-stage multi-precision transient control, so that the test on the multi-stage transient dynamic performance of the laser/infrared gas monitoring instrument is realized.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides an open laser/infrared gas monitoring instrument capability test system which characterized in that: the device comprises a dynamic performance testing device (10), an interference air chamber (20), a conventional air chamber (30), an air supply device for supplying air to the dynamic performance testing device (10), the interference air chamber (20) and the conventional air chamber (30), a console for measuring data display and air circuit control, and a track (40) which is respectively connected with the dynamic performance testing device (10), the interference air chamber (20) and the conventional air chamber (30) in a sliding manner;
the interference air chamber (20) comprises an interference air chamber cavity (21), transparent sealing pieces (22) arranged at two ends of the interference air chamber cavity (21) and a speed-adjustable fan arranged at the bottom of the interference air chamber cavity (21);
the performance test system of the open type laser/infrared gas monitoring instrument detects dynamic measurement data, interference measurement data and conventional measurement data of the laser/infrared gas monitoring instrument to be tested through three gas chamber structures of a dynamic performance test device (10), an interference gas chamber (20) and a conventional gas chamber (30), integrates the three measurement data, and corrects the measurement data of the laser/infrared gas monitoring instrument to be tested.
2. The open laser/infrared gas monitoring instrument performance testing system of claim 1, characterized in that: the interference air chamber (20) further comprises an interference air chamber air inlet (23) and an interference air chamber air outlet (24) which are arranged on the peripheral wall of the interference air chamber cavity (21).
3. The open laser/infrared gas monitoring instrument performance testing system of claim 1, characterized in that: the conventional air chamber (30) is arranged between the dynamic performance testing device (10) and the interference air chamber (20); the conventional air chamber (30) comprises a conventional air chamber cavity, transparent parts arranged at two ends of the conventional air chamber cavity, and a conventional air chamber air inlet and a conventional air chamber air outlet which are respectively arranged on the peripheral wall of the conventional air chamber cavity.
4. The open laser/infrared gas monitoring instrument performance testing system of claim 1, characterized in that: the dynamic performance testing device (10) is a single-cavity air chamber with a cylindrical structure; the single-cavity air chamber comprises a first accommodating cavity, a light screen plate (11) and a first driving device (12), wherein the first accommodating cavity is arranged in the single-cavity air chamber and used for accommodating gas to be detected, the light screen plate (11) is arranged at the front end of the single-cavity air chamber, and the first driving device is electrically connected with the light screen plate (11) and used for dragging the light screen plate (11) to rotate at a high speed.
5. The open laser/infrared gas monitoring instrument performance testing system of claim 4, characterized in that: the shading plate (11) is provided with a light hole (13); the single-cavity air chamber further comprises a first air outlet (101) and a first air inlet (102) which are respectively arranged on the outer peripheral side wall of the single-cavity air chamber.
6. The open laser/infrared gas monitoring instrument performance testing system of claim 1, characterized in that: the dynamic performance testing device (10) is a multi-cavity air chamber with a cylindrical structure; the multi-cavity air chamber comprises a plurality of air chamber units (14) which are arranged independently, a transmission device (15) in transmission connection with the air chamber units (14), and a second driving device (16) which is electrically connected with the transmission device (15) and used for driving the air chamber units (14) to rotate at a high speed.
7. The open laser/infrared gas monitoring instrument performance testing system of claim 6, characterized in that: the multi-cavity air chamber also comprises a bracket (17) fixedly arranged on the track (40) and connected with the track (40) in a sliding way; the bracket (17) comprises a sliding block (171) connected with the track (40) in a sliding way and a rotating wheel (172) connected with the barrel of the multi-cavity air chamber in a rolling way.
8. The open laser/infrared gas monitoring instrument performance testing system of claim 6, characterized in that: the air chamber unit (14) comprises a second accommodating cavity, transparent pieces (143), a second air outlet (141) and a second air inlet (142), wherein the second accommodating cavity is arranged in the air chamber unit and is used for accommodating gas to be detected, the transparent pieces (143) are respectively arranged at two end parts of the air chamber unit and are used for plugging, and the second air outlet (141) and the second air inlet (142) are respectively arranged on the peripheral side wall of the air chamber unit.
9. A performance test method for an open type laser/infrared gas monitoring instrument is characterized by comprising the following steps: the open laser/infrared gas monitoring instrument performance testing system of any one of claims 1 to 8, when the dynamic performance testing device (10) employs a single-chamber gas chamber, comprises the steps of:
s1, firstly, under the regulation and control of a console, the gas supply device supplies gas to the dynamic performance testing device (10), the interference gas chamber (20) and the conventional gas chamber (30), and the first containing cavity of the single-cavity gas chamber is filled with gas to be tested with preset concentration and preset types; the interference air chamber cavity (21) is filled with gas to be detected with preset concentration and type, then pulverized coal is filled in the interference air chamber (20), and the rotating speed of the speed-adjustable fan is adjusted to enable the pulverized coal to float for simulating an underground dust environment; the conventional air chamber (30) is filled with gas to be measured with preset concentration and type; the laser/infrared gas monitoring instrument to be tested is installed on the track (40) through the instrument installation support, and the test distances between the laser/infrared gas monitoring instrument to be tested and the dynamic performance test device (10), the interference gas chamber (20) and the conventional gas chamber (30) are adjusted in a sliding mode;
s2, when the dynamic performance testing device (10) is used for testing, the front end of the single-cavity air chamber is provided with a light shielding plate (11), a light hole (13) is formed in the light shielding plate (11), the light shielding plate (11) is driven to rotate at a high speed by starting the first driving device (12), so that the time of laser penetrating through the single-cavity air chamber is controlled, the response time of a laser gas monitoring instrument to be tested is further measured, generally, the time of measuring the display value to reach 90% of the actual concentration of the gas to be tested is measured, and dynamic measurement data are displayed on the interface of a control console;
s3, when the interference gas chamber (20) is used for testing, the laser/infrared gas monitoring instrument to be tested is placed in front of the transparent plugging piece (22) at one end of the interference gas chamber (20) for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on the interface of the console;
s4, when the conventional air chamber (30) is used for testing, the laser/infrared gas monitoring instrument to be tested is placed in front of a transparent part at one end of the conventional air chamber (30) for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on an interface of a console;
and S5, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
10. A performance test method for an open type laser/infrared gas monitoring instrument is characterized by comprising the following steps: testing with the open laser/infrared gas monitoring instrument performance testing system of any of claims 1 to 8, when the dynamic performance testing device (10) is a multi-chamber gas cell, comprising the steps of:
a1, firstly, under the regulation and control of a control console, the gas supply device supplies gas to the dynamic performance testing device (10), the interference gas chamber (20) and the conventional gas chamber (30), the multi-cavity gas chamber is composed of a plurality of independent gas chamber units (14), and the second containing cavity of each gas chamber unit (14) is filled with gas to be tested with preset concentration and preset type; the interference air chamber cavity (21) is filled with gas to be detected with preset concentration and type, then pulverized coal is filled in the interference air chamber (20), and the rotating speed of the speed-adjustable fan is adjusted to enable the pulverized coal to float for simulating an underground dust environment; the conventional air chamber (30) is filled with gas to be measured with preset concentration and type; the laser/infrared gas monitoring instrument to be tested is installed on the track (40) through the instrument installation support, and the test distances between the laser/infrared gas monitoring instrument to be tested and the dynamic performance test device (10), the interference gas chamber (20) and the conventional gas chamber (30) are adjusted in a sliding mode;
a2, driving the transmission device (15) to move through a second driving device (16), and further driving the transmission device (15) to rotate the multi-cavity air chamber at a high speed, so that the laser beam passes through each air chamber unit (14) according to a set time;
a3, the rotating speed of the multi-cavity air chamber can be controlled by controlling the rotating speed of the second driving device (16), and the time t for the laser beam of the laser/infrared gas monitoring instrument to be tested to pass through the air chamber can be controlled by the rotating speed v of the multi-cavity air chamber barrel-shaped devicemaAnd calculating the effective length l of the test window to obtain:
t＝l/vma；
the multi-stage multi-precision control of the rotating speed of the multi-cavity air chamber cylindrical device is realized by controlling the second driving device (16) and feeding back the measured data, so that the time of a laser beam of the laser/infrared gas monitoring instrument to be tested passing through the air chamber is changed according to the control requirement, and the dynamic measured data is displayed on the interface of the console;
a4, when an interference gas chamber (20) is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent plugging piece (22) at one end of the interference gas chamber (20) for a testing distance of about 2m, gas testing is carried out, interference measurement data are collected and displayed on an interface of a console;
a5, when a conventional gas chamber (30) is used for testing, a laser/infrared gas monitoring instrument to be tested is placed in front of a transparent part at one end of the conventional gas chamber (30) for a testing distance of about 2m, gas testing is carried out, conventional measurement data are collected and displayed on an interface of a console;
and A6, comprehensively comparing the dynamic measurement data, the interference measurement data and the conventional measurement data with the actual gas supply concentration and gas supply type data of the gas supply device, and checking and calibrating the laser/infrared gas monitoring instrument to be tested.
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