CN113108699A - Flexible bag positioning method based on acousto-optic combined detection technology - Google Patents
Flexible bag positioning method based on acousto-optic combined detection technology Download PDFInfo
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- CN113108699A CN113108699A CN202110406722.7A CN202110406722A CN113108699A CN 113108699 A CN113108699 A CN 113108699A CN 202110406722 A CN202110406722 A CN 202110406722A CN 113108699 A CN113108699 A CN 113108699A
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- flexible bag
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
Abstract
A flexible bag positioning method based on acousto-optic combined detection technology belongs to SF6The technical scheme of the invention adopts an acousto-optic combined detection technology, adopts an ultrasonic distance measuring sensor to detect the height of the center of the top surface of the flexible bag, adopts a laser sensor to detect the height of the edge of the flexible bag, and jointly judges whether the flexible bag is full or not according to the height of the center of the top surface and the height of the edge, so that the method is easy to realize.
Description
Technical Field
The invention belongs to SF6The technical field of gas detection, and relates to a flexible bag positioning method based on an acousto-optic combined detection technology.
Background
SF6Detection for operation and maintenance of gas insulated substationThe water content and the impurity content of the gas are used for judging whether the electrical equipment is safe to operate. But due to SF6Greenhouse effect of gases and SF6The possible presence of toxic decomposition products in the gas does not allow direct emission of the detection exhaust.
Common SF currently used in the field6The gas detecting instrument generally comprises a decomposition product tester, a purity meter, a dew point meter, a comprehensive tester and the like. And recovery unit adopts the compressor mostly to carry out the pressure boost to tail gas and retrieves, leads to recovery unit's use to cause the unstability of detecting instrument gas outlet pressure, flow easily for the testing result of detecting instrument receives the influence. Adopt to set up a flexible buffer bag at the recovery unit front end among the prior art, tail gas is advanced to go into in the flexible buffer bag, reuses the compressor and takes out gas in the flexible buffer bag when flexible bag inflation reaches the limit for the detecting instrument gas outlet remains for the ordinary pressure all the time, gets rid of recovery unit to the influence of detecting instrument testing result. How to effectively and accurately detect the expansion degree of the flexible buffer bag is a crucial problem.
As shown in FIG. 3, the prior art is the Chinese Utility model patent with application number 201921453943.4, published as 6/16/2020/6/786Detector tail gas recovery device discloses SF6Detector tail gas recovery unit includes: the device comprises an air inlet, a buffer bag, an ultrasonic distance measuring sensor, first to eighth electromagnetic valves, a buffer tank, a regulating valve, first to fourth pressure sensors, a one-way valve, a pressure reducing valve, a compressor, a built-in recovery bottle, an external recovery bottle and an air collecting bag. The buffer bag sets up between air inlet and first solenoid valve, and ultrasonic ranging sensor can be through detecting and the change of the volume of buffer bag with the perception through the distance between the buffer bag, along with the continuous buffer bag that flows into of gas, the buffer bag inflation gradually, and the distance between buffer bag one side and the ultrasonic ranging sensor is constantly dwindled promptly. When the ultrasonic distance measuring sensor detects that the value is close to the minimum value, the compressor can be started to pump the gas in the buffer bag out and fill the gas into the recovery container. Along with the air in the buffer bag is continuously pumped out, the buffer bag gradually contracts, namely, the distance between one side of the buffer bag and the ultrasonic distance measuring sensor is continuously increased. When in useAnd when the ultrasonic distance measuring sensor detects that the numerical value is close to the maximum numerical value, stopping the compressor. The inside and the outside of the circulating buffer bag are always kept in a normal pressure state, namely, the air outlet of the detection instrument is always in a normal pressure state.
Above-mentioned utility model patent's technical scheme exists because of reasons such as the irregular deformation of flexible bag, fold, leads to expanding before extremely sending at flexible bag, and certain part above the flexible bag reaches a higher position earlier easily for ultrasonic ranging sensor detects the numerical value that meets the requirements in advance and carries out the phenomenon of erroneous judgement.
Disclosure of Invention
The invention aims to solve the problem that the operation is stopped before the flexible bag is full due to the fact that the expansion degree of the flexible bag cannot be effectively and accurately detected due to irregular deformation, wrinkles and the like of the flexible bag.
The invention solves the technical problems through the following technical scheme:
the flexible bag positioning method based on the acousto-optic combination detection technology is combined with a positioning device, the heights of the center of the top surface and the edges of four edges of the flexible bag (4) are increased in the process of inflation and expansion of the flexible bag (4), the height of the center of the top surface of the flexible bag (4) is detected, the height of the edges of the flexible bag (4) is also detected, and whether the flexible bag (4) is full or not is judged together according to the height of the center of the top surface and the height of the edges; the positioning device comprises: the device comprises a bottom plate (1), a laser sensor (2), a reflective film (3) and an ultrasonic distance measuring sensor (5); flexible bag (4) be rectangle elasticity bag, the bottom surface center of flexible bag (4) is fixed pastes on bottom plate (1), reflective membrane (3) have been pasted respectively to the edge on four limits of flexible bag (4), fixedly be provided with four laser sensor (2) respectively and use with reflective membrane (3) cooperation in bottom plate (1), laser that laser sensor (2) slant sent only be in when being full of flexible bag (4) and blockked and reflect by reflective membrane (3), receive by laser sensor (2) reflected laser again, supersound range finding sensor (5) fixed mounting on the upper portion at flexible bag (4) top surface center for detect the height that flexible bag (4) top surface center inflation rises.
The technical scheme of the invention adopts an acousto-optic combined detection technology, adopts an ultrasonic distance measuring sensor (5) to detect the height of the center of the top surface of the flexible bag (4), adopts a laser sensor (2) to detect the height of the edge of the flexible bag (4), and judges whether the flexible bag (4) is full or not according to the height of the center of the top surface and the height of the edge, thereby avoiding the problem that the expansion degree of the flexible bag cannot be accurately detected due to irregular deformation and wrinkles of the flexible bag, and the operation is stopped before the flexible bag (4) is full.
As a further improvement of the technical solution of the present invention, the positioning device further comprises: the microprocessor is respectively connected with the four laser sensors (2) and the ultrasonic distance measuring sensor (5), and the microprocessor is used for processing data obtained by measurement of the laser sensors (2) and the ultrasonic distance measuring sensor (5).
As a further improvement of the technical scheme of the invention, one end part of the flexible bag (4) also comprises an air inlet (C1) and an air outlet (C2), and the air inlet (C1) and the air outlet (C2) are respectively used for inflating and deflating the flexible bag (4).
The invention has the advantages that:
(1) the technical scheme of the invention adopts an acousto-optic combined detection technology, adopts an ultrasonic distance measuring sensor (5) to detect the height of the center of the top surface of the flexible bag (4), adopts a laser sensor (2) to detect the height of the edge of the flexible bag (4), and judges whether the flexible bag (4) is full or not according to the height of the center of the top surface and the height of the edge, thereby avoiding the problem that the expansion degree of the flexible bag cannot be accurately detected due to irregular deformation and wrinkles of the flexible bag, so that the operation is stopped before the flexible bag (4) is full, and the method is easy to realize and convenient to operate.
(2) The laser sensors (2) are obliquely irradiated from bottom to top for detection, so that the heights of the four sides of the flexible bag (4) can be effectively detected, and the mutual interference of the four laser sensors (2) can be avoided.
Drawings
FIG. 1 is a schematic structural diagram of a flexible bag positioning device based on acousto-optic combined detection technology according to an embodiment of the invention;
FIG. 2 is a schematic optical path diagram of a flexible bag positioning device based on acousto-optic combined detection technology according to an embodiment of the present invention;
fig. 3 is a block diagram of a prior art apparatus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.
The technical scheme of the invention is further described by combining the drawings and the specific embodiments in the specification:
example one
As shown in fig. 1, the flexible bag positioning device based on the acousto-optic combination detection technology comprises: the device comprises a bottom plate 1, a laser sensor 2, a reflective film 3, a flexible bag 4 and an ultrasonic distance measuring sensor 5; the flexible bag 4 is a rectangular elastic bag, the center of the bottom surface of the flexible bag 4 is fixedly attached to the bottom plate 1, the edges of four edges of the flexible bag 4 are respectively attached with the reflective films 3, the bottom plate 1 is respectively and fixedly provided with four laser sensors 2 which are matched with the reflective films 3 for use, laser emitted by the laser sensors 2 in the oblique upward direction is blocked and reflected by the reflective films 3 only when the flexible bag 4 is in a full-filled state, the reflected laser is received by the laser sensors 2, and the ultrasonic distance measuring sensor 5 is fixedly installed on the upper portion of the center of the top surface of the flexible bag 4 and used for detecting the height of the expansion and rise of the center of the top surface of the flexible bag 4; the ultrasonic distance measuring sensor 5 and the four laser sensors 2 are all connected with the microprocessor, and data obtained through measurement are sent to the microprocessor for data processing.
As shown in fig. 2, which is a cross-sectional view of the device taken along the line connecting the center point of the laser sensor 2 and the center point of the reflective membrane 3, the flexible bag 4 is filled with gas, in an expanded state, in the figure, point S is the outermost point of the centers of the four sides of the flexible bag 4, L1 is the laser emitting path of the laser sensor 2, L2 is the moving path of the outermost points of the centers of the four sides of the flexible bag 4 during the expansion process, namely, during the expansion process of the flexible bag 4, the outermost point S in the center of the four sides of the flexible bag 4 moves along the path L2 from bottom to top, due to irregular deformation of the flexible bag 4, the point S may not move completely along the path L2, but because the center of the bottom surface of the flexible bag 4 is fixed at the center of the bottom plate, the space in which the point S can move is limited, the point S is only possible inside the path L2 and does not move outside the path L2, so that the laser light emitted from the laser sensor 2 does not impinge on the reflective film 3 in advance before the point S reaches the design height.
Before the device is used, the flexible bag 4 is filled, the positions of the four laser sensors 2 on the four sides of the flexible bag 4 are finely adjusted, and the laser emitted by the laser sensors 2 can be ensured to irradiate the reflective films 3 on the corresponding sides. The flexible bag 4 is initially in a vacuum state and attached to the bottom plate, and as the air continuously enters the flexible bag 4 from the air inlet, the flexible bag 4 is expanded, and the four outermost points S in the centers of the four sides of the flexible bag 4 move upwards. When the record between the ultrasonic distance measuring sensor 5 and the top surface of the flexible bag 4 is smaller than a set value, a signal is sent to the microprocessor, and at the moment, although the detection result of the ultrasonic distance measuring sensor 5 meets the requirement, the flexible bag 4 does not reach a full state at the moment due to irregular deformation of the flexible bag 4; when the four points S all reach the design height, the reflective film adhered to the centers of the four sides of the flexible bag 4 is blocked on the path L1, that is, the laser emitted by the laser sensor 2 irradiates the reflective film, when the laser sensor 2 receives the reflected laser, the laser sensor 2 sends a signal to the microprocessor, and when the microprocessor receives the signals emitted by the four laser sensors 2 on the four sides of the flexible bag 4 and the signal from the ultrasonic distance measuring sensor 5, that is, when it is known that the flexible bag 4 is full, the input of gas is stopped or the gas starts to be pumped out from the gas outlet.
The flexible bag positioning method based on the acousto-optic combined detection technology is characterized in that the center of the bottom surface of the flexible bag 4 is fixed, the heights of the center of the top surface and the four sides of the flexible bag 4 are increased when the flexible bag 4 is in an expansion state, the height of the center of the top surface of the flexible bag 4 is detected, the heights of the four sides of the flexible bag 4 are also detected, and whether the flexible bag 4 is full or not is judged together according to the height of the center of the top surface and the heights of the four sides.
Specifically, on the basis that the distance between the centers of the top surfaces of the flexible bags 4 is detected by using the ultrasonic distance measuring sensors 5, four groups of laser sensors 2 are added to detect the heights of four sides of the flexible bags 4, the laser sensors 2 are placed at the positions below the outer sides of the centers of the four sides of the flexible bags 4 in an inclined mode, the centers of the four sides of the flexible bags 4 are tightly attached to the reflective films 3, the laser sensors 2 emit laser in an inclined mode, when the laser sensors 2 detect the reflected laser, the heights of the four sides of the flexible bags 4 reach the set height, and the fact that the distances between the laser sensors 5 and the centers of the top surfaces of the flexible bags 4 are smaller than the set value is combined with the detection of the ultrasonic distance measuring sensors 5.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. The flexible bag positioning method based on the acousto-optic combination detection technology is characterized in that a positioning device is combined, the heights of the center of the top surface and the edges of four edges of the flexible bag (4) are increased in the process of inflation and expansion of the flexible bag (4), the height of the center of the top surface of the flexible bag (4) is detected, the height of the edges of the flexible bag (4) is also detected, and whether the flexible bag (4) is in a full state or not is judged together according to the height of the center of the top surface and the height of the edges; the positioning device comprises: the device comprises a bottom plate (1), a laser sensor (2), a reflective film (3) and an ultrasonic distance measuring sensor (5); flexible bag (4) be rectangle elasticity bag, the bottom surface center of flexible bag (4) is fixed pastes on bottom plate (1), reflective membrane (3) have been pasted respectively to the edge on four limits of flexible bag (4), fixedly be provided with four laser sensor (2) respectively and use with reflective membrane (3) cooperation in bottom plate (1), laser that laser sensor (2) slant sent only be in when being full of flexible bag (4) and blockked and reflect by reflective membrane (3), receive by laser sensor (2) reflected laser again, supersound range finding sensor (5) fixed mounting on the upper portion at flexible bag (4) top surface center for detect the height that flexible bag (4) top surface center inflation rises.
2. The acousto-optic combination detection technology-based flexible bag positioning method according to claim 1, wherein the positioning device further comprises: the microprocessor is respectively connected with the four laser sensors (2) and the ultrasonic distance measuring sensor (5), and the microprocessor is used for processing data obtained by measurement of the laser sensors (2) and the ultrasonic distance measuring sensor (5).
3. The method for positioning a flexible bag based on an acousto-optic binding detection technique according to claim 2, characterized in that the end of the flexible bag (4) further comprises an air inlet (C1) and an air outlet (C2), the air inlet (C1) and the air outlet (C2) being used for inflating and deflating the flexible bag (4), respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116626103A (en) * | 2023-07-24 | 2023-08-22 | 常州铂力塑胶有限公司 | Sound and heat insulation material performance detection device and method |
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| CN116626103A (en) * | 2023-07-24 | 2023-08-22 | 常州铂力塑胶有限公司 | Sound and heat insulation material performance detection device and method |
| CN116626103B (en) * | 2023-07-24 | 2023-09-22 | 常州铂力塑胶有限公司 | Sound and heat insulation material performance detection device and method |
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