CN112985547A - Automatic diaphragm gas meter verification system based on color code sensor - Google Patents
Automatic diaphragm gas meter verification system based on color code sensor Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
Abstract
The invention discloses a diaphragm gas meter automatic calibration system based on a color mark sensor, which comprises a gas storage tank, a pressure regulating valve, a pressure stabilizing device, a standard meter, a calibration device, a recovery tank and a microprocessor, wherein the gas storage tank, the pressure regulating valve, the pressure stabilizing device, the standard meter, the calibration device and the recovery tank are sequentially communicated through a gas pipe, and the pressure stabilizing device, the standard meter and the calibration device are respectively in communication connection with the microprocessor; the calibrating device comprises a calibrating platform, a plurality of turnover calibrating mechanisms arranged on a cross arm of the calibrating platform, and a plurality of tables to be calibrated arranged at the lower ends of the turnover calibrating mechanisms, wherein the turnover calibrating mechanisms are respectively in communication connection with the microprocessor. The stability of gas transmission rate when keeping examining through voltage regulator device has reduced systematic error, and the design has convertible accreditation mechanism to be convenient for install and detect the multiunit diaphragm type gas table on examining the test table simultaneously, adopts color mark sensor monitoring examination simultaneously to be the scale mark of end position character wheel, and the precision of examination is high.
Description
Technical Field
The invention relates to the technical field of metering detection, in particular to an automatic diaphragm gas meter verification system based on a color code sensor.
Background
The gas meter is a main evidence for trade settlement between a gas company and a gas user, and directly influences the interest of both gas supply and gas supply parties, so the metering accuracy of the gas meter is very important; the metering verification of the gas meter is an important means for guaranteeing the metering accuracy of the gas meter. At present, most gas meter manufacturers and calibration devices of legal metering and calibrating mechanisms calibrate the gas meters in a manual operation or semi-automatic mode, for example, calibration personnel are used for manually recording accumulated flow, temperature, pressure and the like of the gas meters to be tested, and various error accidents are easy to occur in the calibration process of the gas meters; the calibrating device of the gas meter, the operation of calibrating workers, the influence of the surrounding environment and the like are important sources for introducing the uncertainty of calibration, so that the calibrating device is upgraded and modified, the uncertainty components can be reduced by adopting the calibrating device with higher accuracy grade, higher automation degree and stronger interference resistance, and finally, high-efficiency and accurate calibration is realized.
At present, in the link of detecting the accumulated flow of a detected meter of an indicating value error detection project, an automatic detection mode is not ideal. The existing automatic detection mode mainly comprises the steps of carrying out photoelectric sampling on a last character wheel of a gas meter counter or carrying out image recognition on characters of the character wheel of the counter, wherein the two modes have the problems of low detection precision, low reading success rate and the like, the quality and the efficiency of detection are still to be improved, and the improvement on the existing automatic detection technology is urgently needed. For the verification mode of recognizing the same character by the last digit wheel image of the gas meter counter, the problem that the last digit wheel must be waited to rotate for an integer number of turns after verification is finished also exists, and the verification efficiency is reduced. If an image recognition mode of reading a character wheel image and converting the character wheel image into an initial numerical value or a final numerical value is adopted, as the character wheel of the counter continuously rotates in the verification process, the number of the shot character wheel may be adjacent 2 half characters instead of a complete character (the numbers above and below a dial jump table gap are incomplete), character matching with a character library is difficult, great difficulty and inaccurate recognition are brought to image recognition, and in addition, great external interference exists, such as light change and the like, which can influence the success rate of the image recognition. Meanwhile, the gas meter is not only more accurate in the aspect of factory calibration and calibration in the metering technology of the gas meter, and meanwhile, errors caused by external uncertain factors need to be overcome in a calibration system, and the gas flow of gas in a gas pipeline needs to be ensured to be output at a constant rate.
Chinese patent, publication No.: CN103278220B, published: in 2015, 9, 30 days, a method for rapidly detecting basic errors of a diaphragm gas meter is disclosed, which comprises the following steps: carrying out large-flow point verification on the membrane surface; carrying out medium flow point verification; carrying out small flow point verification; and (4) according to the point detection results of the three flow points of the large flow point, the medium flow point and the small flow point, performing qualification judgment on the detected gas meter, and finally obtaining and storing a verification certificate. When the membrane type gas meter basic error detection is carried out, a large flow point, a medium flow point and a minimum flow point of the detected gas meter need to be detected respectively, and when the large flow point is detected, a conventional method is adopted to obtain a detection result and an equivalent rotation volume value is obtained; when the small flow point is detected, the equivalent rotation volume value obtained in the large flow point detection is utilized, and one equivalent rotation volume is used as the detection volume, so that the detection time of the small flow point is greatly shortened. The scheme adopts the following mode in the section 0009: the method comprises the following steps of carrying out large-flow point verification on a membrane meter, wherein a photoelectric sensor detects a reflection mark on a minimum reading disc of a membrane type gas meter character wheel type counter, the reflection mark generates one pulse per turn, and the photoelectric sensor collects and records the number of the pulses and the pulse generation time; the data acquisition and processing module acquires the pressure difference between the air inlet and the air outlet of the membrane meter by using a differential pressure sensor, records the periodically changed differential pressure value, obtains an equivalent revolution volume value through signal processing and sends the equivalent revolution volume value to a computer; the computer obtains the volume indicating value of the detected gas meter by calculating the detection pulse of the photoelectric sensor, then performs data operation with the actual flow value of the standard meter to obtain the basic error of a large flow point and store data, and adopts the photoelectric sensor to detect the reflecting mark on the minimum dial (wherein only one reflecting mark is arranged on the minimum dial), so that the detection precision is not high.
Chinese patent, publication No.: CN108444578A, published: the invention discloses an online monitoring method for the metering performance of a membrane type gas meter in 24 months in 2018, and discloses an online monitoring method for the metering performance of a membrane type gas meter (comprising a membrane meter). When the diaphragm gas meter discharges a rotary volume of gas, the rotating shaft of the meter core rotates for one circle, and the magnetic rotating disc is directly meshed with a gear output by the rotating shaft in the meter or the rotating shaft outside the meter, so that when the diaphragm gas meter discharges one rotary volume, the magnetic rotating disc rotates for one circle; the invention has greatly improved the measurement resolution ratio of the gas meter, match through the characteristic of pertinence to the apparatus, through the intellectual analysis and judgement to every segmental motion information, thus has realized the qualitative and quantitative judgement, internal leakage judgement, external leakage judgement and safe judgement of the constant flow rate to the measurement error of the diaphragm type gas meter, offer the reliable guarantee for the active safe management of the gas, the invention controls and uses the gas safety pipe to the error of the diaphragm type gas meter, intelligence of the gas user; the device limits the structure principle, each revolution volume outputs a pulse signal for counting, in order to improve the metering precision, more than two pulse signals are required to be output in each period, the device is realized through an electromechanical conversion device, and the device is not an innovation in the detection and metering technology through the improvement on the counting structure of the gas meter.
Disclosure of Invention
The invention aims to solve the problems of high defective rate caused by low factory calibration precision of the traditional membrane type gas meter and high system error caused by unstable calibration system, designs an automatic calibration system of the membrane type gas meter based on a color mark sensor, keeps the stability of gas transmission rate during calibration through a pressure stabilizing device, reduces the system error, designs a turnover type calibration mechanism which is convenient to install on a detection table and simultaneously detects a plurality of groups of membrane type gas meters, and simultaneously adopts the color mark sensor to monitor the scale mark of a last character wheel, thereby having high calibration precision.
In order to achieve the technical purpose, the invention provides a technical scheme that the automatic diaphragm gas meter calibrating system based on the color mark sensor comprises a gas storage tank, a pressure regulating valve, a pressure stabilizing device, a standard meter, a calibrating device, a recovery tank and a microprocessor, wherein the gas storage tank, the pressure regulating valve, the pressure stabilizing device, the standard meter, the calibrating device and the recovery tank are sequentially communicated through a gas pipe, and the pressure stabilizing device, the standard meter and the calibrating device are respectively in communication connection with the microprocessor; the calibrating device comprises a calibrating platform, a plurality of turnover calibrating mechanisms arranged on a cross arm of the calibrating platform, and a plurality of tables to be calibrated arranged at the lower ends of the turnover calibrating mechanisms, wherein the turnover calibrating mechanisms are respectively in communication connection with the microprocessor.
In this scheme, gas in the gas holder emits gas through the pressure regulating valve, and gaseous transmission flow becomes stable back entering standard table and waiting to examine and determine the table after gaseous transmission through pressure stabilizing device in the trachea, and convertible accreditation mechanism is convenient for install and is detected the multiunit diaphragm type gas table simultaneously on examining the test table.
Preferably, the turnover type calibration mechanism comprises a turnover mechanism arranged on the calibration table, a support rod with one end connected with the movable part of the turnover mechanism, a fine adjustment mechanism connected with the other end of the support rod and a calibrator connected with the fine adjustment mechanism, wherein the control end of the turnover mechanism and the signal acquisition end of the calibrator are respectively and electrically connected with the microprocessor; the turnover mechanism comprises a turnover box, a steering engine arranged in the turnover box and a loop bar detachably connected with an output shaft of the steering engine, the loop bar is fixedly connected with a support bar, the turnover mechanism is fixedly arranged on a cross arm of the detection table through screws, and a control end of the steering engine is electrically connected with a control end of the microprocessor.
In this scheme, microprocessor control tilting mechanism action, tilting mechanism and bracing piece are connected and are realized rotating, and the detector of control bracing piece lower extreme reachs the detection area, realizes monitoring through adjusting fine-tuning accurate location to the detection area. The upper computer of the microprocessor is a computer, and the lower computer is a microprocessor (a singlechip with a control function); when the verification starts, the microprocessor controls the turnover mechanism to turn downwards to drive the whole turnover verification mechanism to turn over to an area to be verified, and the verification device is roughly positioned; when the light beam of the color mark sensor deviates from the circular ring area where the scale mark of the last position character wheel of the mechanical counter of the detected gas meter is located, the vertical direction fine adjustment device and the horizontal direction fine adjustment device in the fine adjustment device are used for flexibly performing positioning fine adjustment to realize more accurate positioning. The color identification module comprises a color code sensor and a pulse counter, the color code sensor can detect the tiny change of the color in a wide range, the detection circuit is simple, and the extremely fast response speed can be obtained; the bottom color of the last character wheel of the mechanical counter is red, the color of the scale mark is white, and the red data and the white data obtained by the color mark sensor are different so as to carry out color identification; when white scale marks are detected, the color mark sensor sends a pulse count to the pulse counter, the pulse counter transmits the collected pulse count to the lower computer, and the accumulated flow indication value V of the detected meter is calculated through a calculation formula. The steering engine is simple to control, can realize the reciprocating turnover motion of 90 degrees to 180 degrees, can make the detector reach any position in detection area, and the suitability is strong.
Preferably, the fine adjustment mechanism comprises a convex hollow sleeve and a verification bracket movably connected with the hollow sleeve; the detection support is provided with a detector, the hollow sleeve is fixedly connected with the support rod, and the hollow sleeve is internally provided with a longitudinal adjusting mechanism; the longitudinal adjusting mechanism comprises a base sleeved with the hollow sleeve, a convex rod arranged on the base, a spring, a screw rod penetrating through the side end of the hollow sleeve, adjusting knobs arranged at two ends of the screw rod, a first clamping piece and a second clamping piece which are symmetrically screwed on the screw rod, and a limiting rod penetrating through the side end of the hollow sleeve and sleeved with the first clamping piece and the second clamping piece, wherein one end of the spring is connected with the top end of the convex rod, and the other end of the spring is connected with the top end of the hollow sleeve; threads in opposite directions are arranged at two ends of the screw rod in central symmetry, the first clamping piece and the second clamping piece are respectively in threaded connection with the threads, rubber gaskets are arranged on contact surfaces of the first clamping piece and the second clamping piece with the convex rod, and threads are arranged on the whole body of the convex rod; be provided with between the bottom plate of base and examination support and be used for the spacing horizontal adjustment mechanism of level, the edge of base and bottom plate cup joints and makes it rotate by the level, horizontal adjustment mechanism includes a plurality of slotted holes that become the circumference and radially set up on the base bottom surface, be provided with the answer spring in the slotted hole, the lower extreme of answer spring is provided with the steel ball, the up end of bottom plate is provided with the pit that a plurality of matches the steel ball, the third of steel ball diameter falls into in the pit.
In the scheme, the distance between the first clamping piece and the second clamping piece can be adjusted by rotating the adjusting knob, the first clamping piece and the second clamping piece can be adjusted to clamp the convex rod for fixing, and the first clamping piece and the second clamping piece can be adjusted to enable the convex rod to move up and down for height adjustment; rubber gaskets are arranged on the contact surfaces of the first clamping piece and the second clamping piece with the convex rod, and threads are arranged on the periphery of the convex rod, so that a better fastening effect can be ensured; after the adjustment of the longitudinal adjusting mechanism is finished, the verification angle of the calibrator can be rotated by adjusting the horizontal adjusting mechanism, the calibration support is manually rotated, the calibration support rotates relative to the base, the steel ball rolls in the pit and retracts into the reset spring under the action of rotating force, the steel ball easily falls into an adjacent pit to realize a limiting effect, the pit is arranged at a circumferential position far away from the central point of the calibration support, the size and the distribution density of the pit directly determine the accuracy of the horizontal angle adjustment, therefore, the number of the pits circumferentially arranged in the calibration support is at least fifty, and the relative angle of the adjacent pits is 7.2 degrees.
Preferably, the calibrator is a color mark sensor, the edge of a last character wheel of a counter of the diaphragm gas meter is provided with a plurality of scale marks, and during calibration, the detection end of the color mark sensor is over against an area, containing the scale marks, of the last character wheel.
In the scheme, the principle that the color mark sensor can identify different colors is utilized to distinguish the white scale lines and the red chassis of the last character wheel of the mechanical counter, so that the automatic reading verification work is realized, and the reading accuracy and reliability of the automatic verification of the gas meter are improved; the color identification technology of the color mark sensor is adopted to identify the scale mark of the last character wheel of the mechanical counter, the ground color of the dial is red, the scale mark is white, the colors of the dial and the scale mark are different, the color data measured by the color mark sensor changes when the counting character wheel rotates, and whether the scale mark and the counting are detected or not is distinguished. When the gas meter runs at a certain speed and the flow rate is stabilized at a verification flow rate point, the control box sends a starting instruction to the color mark sensor and the pulse counter, the pulse counter is cleared, the color mark sensor starts to identify the last-position character wheel scale mark, when the fact that a white scale mark passes through is detected, the high level is set, a counting pulse is sent to the pulse counter through a signal line, the fact that the bottom color of the character wheel is red is detected, namely the fact that the scale mark does not exist is set to be the low level, and the pulse is not sent. The pulse counter is positioned in the control box, accumulates the pulse quantity in the verification process, and further calculates the accumulated flow indicating value of the to-be-detected meter. According to the counting principle described above, the calculation formula for obtaining the gas accumulated flow indication value of the gas meter is as follows:
in the formula, V is the indication value of the gas accumulated flow of the detected meter, and the unit is L; v0The volume value of the last character wheel of the mechanical counter is rotated for one circle; n is the number of the scale marks of the last character wheel; n is the number of counted pulses.
Preferably, the pressure stabilizer comprises a pressure stabilizing chamber, a flow stabilizing pipe penetrating through the pressure stabilizing chamber, a first flow stabilizer, a second flow stabilizer, an overflow device, a first linkage device and a second linkage device, wherein the first flow stabilizer, the second flow stabilizer, the overflow device, the first linkage device and the second linkage device are arranged at the upper end of the flow stabilizing pipe, the first flow stabilizer and the second flow stabilizer are sequentially communicated with the flow stabilizing pipe, air pipes are communicated with two ends of the flow stabilizing pipe, the first flow stabilizer and the second flow stabilizer are linked through the first linkage device, the overflow device is communicated with the second flow stabilizer through the air pipes, the second linkage device serves as a communication switch to achieve communication and disconnection of the overflow device and the second flow stabilizer, and a return end of the overflow device is communicated with an air inlet end of the recovery tank.
In this scheme, the intraductal gas flow of stationary flow is adjusted in first current stabilizer action, when first current stabilizer reachd the regulation threshold value, first aggregate unit is triggered, first aggregate unit orders about the second current stabilizer and adjusts the action, when the second current stabilizer reaches the regulation threshold value, the second aggregate unit is triggered, overflow arrangement and second current stabilizer intercommunication realize the release function, adjust layer by layer can be fast and stable keep the intraductal gas flow of stationary flow to a stable value, guaranteed gas transportation's security.
Preferably, the first current stabilizer comprises a first current stabilization cylinder communicated with the current stabilization pipe, a first isolation block dividing the first current stabilization cylinder into a first sliding cavity and a first recovery cavity, a first sliding block in sliding connection with the inner wall of the sliding cavity, and a first connecting rod, one end of which is fixedly connected with the first sliding block and penetrates through the first isolation block; the other end of the first connecting rod extends to the first recovery cavity and is fixedly connected with the first permanent magnet, one end of the first spring is arranged at the top end of the recovery cavity, and the other end of the first spring is fixedly connected with the first permanent magnet.
Preferably, the second current stabilizer comprises a second current stabilization cylinder, a second isolation block for dividing the second current stabilization cylinder into a second sliding cavity and a second recovery cavity, a second sliding block in sliding connection with the inner wall of the sliding cavity, and a second connecting rod, one end of the second connecting rod is fixedly connected with the second sliding block and penetrates through the second isolation block; the other end of the second connecting rod extends to the second recovery cavity and is fixedly connected with the iron block, one end of the second spring is arranged at the top end of the recovery cavity, and the other end of the second spring is fixedly connected with the iron block.
Preferably, the first linkage device is arranged between the first current stabilizer and the second current stabilizer; the first linkage device comprises a first linkage cavity communicated with the upper part of the first recovery cavity, a first I-shaped block arranged in the first linkage cavity and realizing recovery through a first recovery spring, and a first traction device arranged in the first traction cavity, wherein one end of the first I-shaped block is provided with a magnetic block repulsive to the magnetic pole of a first permanent magnet, the bottom of one end of the first I-shaped block is provided with a grinding tooth, the first traction device comprises a first T-shaped frame erected in the first traction cavity, a cross arm of the first T-shaped frame is provided with a first gear meshed with the grinding tooth, a vertical arm of the first T-shaped frame is provided with a first pulley, a first coiling disc is coaxially and fixedly arranged on the first gear, a first clamping hole is transversely formed in the second isolation block, a first clamping rod is arranged in the first clamping hole, and the first clamping rod realizes recovery through the spring arranged in the clamping hole, the first groove matched with the first clamping rod is formed in the second connecting rod, and one end of the metal wire is connected with the first clamping rod and wound on the first pulley to be connected with the first wire winding disc.
In this scheme, first permanent magnet is because the regulatory action of first sliding block goes upward along first slip chamber and reachs the regulation threshold value, first permanent magnet reachs with first worker's shape piece co-altitude, because the one end of first worker's shape piece is provided with the magnetic path that repels mutually with the ferromagnetic pole of first permanent magnet, therefore, first worker's shape piece receives the repulsion effect and slides in first linkage intracavity, because the meshing of first worker's shape piece and first gear, order about first rotary disk and rotate, the metal wire of first rotary disk pulls first kelly and makes kelly and first recess break away from, first fulcrum bar can reciprocate, make second sliding block movable upward realize regulatory function.
Preferably, the second linkage device comprises a second linkage cavity close to the wall of the second sliding cavity, a pressing block in press-type linkage with the second sliding block, and a blocking rod arranged in the second linkage cavity and linked with the pressing block; the lower end of the blocking rod is provided with a rubber sleeve with a sealing function, the lower end of the blocking rod is positioned at a communicating part of the overflow device and the second sliding cavity, the upward movement of the blocking rod can realize the smoothness of gas at the communicating part, the downward movement of the blocking rod can realize the blockage of gas at the communicating part, the transverse return movement of the pressing block is realized through a spring, one end of the pressing block, which extends into the second sliding cavity, is an arc convex head, and the contact surface of the second sliding block and the arc convex head is an arc surface; the one end bottom surface that the pressing block stretched into the second linkage chamber is provided with the wedge, the upper end and the wedge of shutoff pole are contradicted, the shutoff pole sets up at the second linkage intracavity through last spacing ring and lower spacing ring activity.
In this scheme, when the second linkage does not trigger, overflow arrangement and second slip chamber block up through the shutoff pole and realize isolated effect, when the second linkage triggers, the second sliding block goes upward and realizes regulatory function, the second regulating block reaches the top in second slip chamber, because the second sliding block sets up to the arcwall face with the contact surface of circular arc plush head, can the smooth circular arc plush head of pressing down of silk, press and move about to the horizontal shrink of second linkage chamber soon, because the structural action of wedge, the shutoff pole is under the effect of the restoring force of spring, upward movement, consequently, overflow arrangement is opened with the shutoff department in second slip chamber, gaseous quick overflow arrangement that gets into realizes regulatory function.
Overflow arrangement is including vacuum cavity and compression chamber and backward flow jar, the vacuum cavity slides the chamber with the second and passes through the trachea intercommunication, the backflow gas in the vacuum cavity compresses leading-in backward flow jar through the compressor in the compression chamber, the backward flow jar passes through the trachea and retrieves jar intercommunication.
The invention has the beneficial effects that: the invention relates to a diaphragm gas meter automatic verification system based on a color mark sensor, which keeps the stability of gas transmission rate during verification through a voltage stabilizer, reduces system errors, wherein the voltage stabilizer is in pure mechanical transmission, avoids potential safety hazards caused by frequent actions of a traditional electric control switch valve, is provided with a turnover verification mechanism which is convenient to install on a detection table and simultaneously detects a plurality of groups of diaphragm gas meters, detects by applying the color recognition principle of the color mark sensor, can detect tiny changes of colors in a wide range, and compared with the traditional verification mode, provides a mode of recognizing end character wheel scale lines of a gas meter counter by the color mark sensor, can perform verification at any time, is not limited to a certain starting position or a certain ending position, is beneficial to improving the verification efficiency, and saves the time required by verification.
Drawings
Fig. 1 is a schematic structural diagram of an automatic diaphragm gas meter verification system based on a color scale sensor according to the present invention.
Fig. 2 is a schematic structural diagram of the flip-type verification mechanism of the present invention.
Fig. 3 is a schematic structural diagram of the fine adjustment mechanism of the present invention.
Fig. 4 is a partial structural schematic diagram of the fine adjustment mechanism of the present invention.
Fig. 5 is a schematic structural view of the horizontal adjustment mechanism of the present invention.
Fig. 6 is a schematic structural diagram of the voltage stabilizer of the present invention.
Fig. 7 is a schematic structural diagram of a first current stabilizer according to the present invention.
Fig. 8 is a schematic structural diagram of a second current stabilizer according to the present invention.
Fig. 9 is a schematic structural diagram of a first linkage device of the present invention.
Fig. 10 is a schematic view of a second linkage of the present invention.
The notation in the figure is: 1-a calibration platform, 2-a turnover type calibration mechanism, 3-a membrane gas meter, 4-a gas storage tank, 5-a pressure regulating valve, 6-a pressure stabilizing device, 7-a standard meter, 8-a recovery tank, 21-a turnover mechanism, 22-a support rod, 23-a fine adjustment mechanism, 24-a calibrator, 231-a hollow sleeve, 232-a base, 233-a convex rod, 234-a spring, 235-a screw rod, 236-an adjusting knob, 237-a horizontal adjusting mechanism, 238-a limiting rod, 239-a first clamping piece and 240-a second clamping piece; 2371-slotted hole, 2372-restoring spring, 2373-steel ball, 2374-pit 61-first current stabilizer, 62-second current stabilizer, 63-first linkage, 64-second linkage, 65-overflow device, 66-surge chamber, 67-current stabilizer, 611-first sliding cavity, 612-first restoring cavity, 613-first isolating block, 614-first sliding block, 615-first connecting rod, 616-first permanent magnet, 617-first spring, 621-second sliding cavity, 622-second restoring cavity, 623-second isolating block, 624-second sliding block, 625-second connecting rod, 626-iron block, 627-second spring, 631-first linkage cavity, 632-first engineering block, 633-first restoring spring, 634-a first traction cavity, 635-a first T-shaped frame, 636-a first coiling disc, 637-a first pulley, 638-a first gear, 639-a first clamping rod, 641-a pressing block, 642-a second linkage cavity, 643-a blocking rod, 644-a rubber sleeve and 645-a limiting sheet.
Detailed Description
For the purpose of better understanding the objects, technical solutions and advantages of the present invention, the following detailed description of the present invention with reference to the accompanying drawings and examples should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and not for limiting the scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts shall fall within the scope of the present invention.
Example (b): as shown in fig. 1, the automatic diaphragm gas meter calibration system based on the color mark sensor is a schematic structural diagram, and includes a gas storage tank 4, a pressure regulating valve 5, a pressure stabilizing device 6, a standard meter 7, a calibration device, a recovery tank 8, and a microprocessor (not shown), where the gas storage tank, the pressure regulating valve, the pressure stabilizing device, the standard meter, the calibration device, and the recovery tank are sequentially communicated through a gas pipe, and the pressure stabilizing device, the standard meter, and the calibration device are respectively in communication connection with the microprocessor; the calibrating device comprises a calibrating platform 1, a plurality of turnover calibrating mechanisms 2 arranged on a cross arm of the calibrating platform, and a plurality of tables 3 to be calibrated arranged at the lower ends of the turnover calibrating mechanisms, wherein the turnover calibrating mechanisms are respectively in communication connection with a microprocessor.
In this embodiment, gas in the gas holder discharges gas through the pressure regulating valve, and the transmission flow of gas becomes stable after gas is transmitted through the pressure stabilizing device in the trachea and then enters the standard meter and the meter to be verified, and convertible verification mechanism is convenient for install on detecting platform and detect the multiunit membrane type gas table simultaneously.
As shown in fig. 2, the turnover type calibration mechanism comprises a turnover mechanism 21 mounted on the calibration platform, a support rod 22 with one end connected with the movable part of the turnover mechanism, a fine adjustment mechanism 23 connected with the other end of the support rod, and a calibrator 24 connected with the fine adjustment mechanism, wherein the control end of the turnover mechanism and the signal acquisition end of the calibrator are respectively electrically connected with the microprocessor; the turnover mechanism comprises a turnover box, a steering engine arranged in the turnover box and a loop bar detachably connected with an output shaft of the steering engine, the loop bar is fixedly connected with a support bar, the turnover mechanism is fixedly arranged on a cross arm of the detection table through screws, and a control end of the steering engine is electrically connected with a control end of the microprocessor.
In the embodiment, the microprocessor controls the turnover mechanism to act, the turnover mechanism is connected with the supporting rod to rotate, the detector at the lower end of the supporting rod is controlled to reach the detection area, and the detection area is accurately positioned by adjusting the fine adjustment mechanism to realize monitoring. The upper computer is a computer, and the lower computer is a microprocessor (a single chip microcomputer with a control function); when the verification starts, the microprocessor controls the turnover mechanism to turn downwards to drive the whole turnover verification mechanism to turn over to an area to be verified, and the verification device is roughly positioned; when the light beam of the color mark sensor deviates from the circular ring area where the scale mark of the last character wheel of the mechanical counter is located, the vertical fine adjustment device and the horizontal fine adjustment device in the fine adjustment mechanism are used for flexibly performing positioning fine adjustment to achieve more accurate positioning. The calibrator comprises a color mark sensor and a pulse counter, the color mark sensor can detect the tiny change of color in a wide range, the detection circuit is simple, and extremely high response speed can be obtained; the bottom color of the last character wheel of the mechanical counter is red, the color of the scale mark is white, and the red data and the white data obtained by the color mark sensor are different so as to carry out color identification; when white scale marks are detected, the color mark sensor sends a pulse to the pulse counter, the pulse counter transmits the collected pulse number to the lower computer, and the accumulated flow indication value V of the detected meter is calculated through a calculation formula. The steering engine is simple to control, can realize the return turnover movement of 90 degrees to 180 degrees, can make the calibrator arrive any position in detection area, and the suitability is strong.
As shown in fig. 3 and 4, the fine adjustment mechanism includes a convex hollow sleeve 231 and a calibration bracket movably connected with the hollow sleeve; the detection support is provided with a detector, the hollow sleeve is fixedly connected with the support rod, and the hollow sleeve is internally provided with a longitudinal adjusting mechanism; the longitudinal adjusting mechanism comprises a base 232 sleeved with the hollow sleeve, a convex rod 233 arranged on the base, a spring 234, a screw 235 penetrating through the side end of the hollow sleeve, adjusting knobs 236 arranged at both ends of the screw, a first clamping piece 239 and a second clamping piece 240 symmetrically screwed on the screw, and a limiting rod 238 penetrating through the side end of the hollow sleeve and sleeved with the first clamping piece and the second clamping piece, wherein one end of the spring is connected with the top end of the convex rod, and the other end of the spring is connected with the top end of the hollow sleeve; threads in opposite directions are arranged at two ends of the screw rod in central symmetry, the first clamping piece and the second clamping piece are respectively in threaded connection with the threads, rubber gaskets are arranged on contact surfaces of the first clamping piece and the second clamping piece with the convex rod, and threads are arranged on the whole body of the convex rod; as shown in fig. 5, be provided with between the bottom plate of base and examination support and be used for the spacing horizontal adjustment mechanism 237 of level, the edge of base and bottom plate cup joints and makes it can the horizontal rotation, horizontal adjustment mechanism includes a plurality of slotted holes 2371 that become the radial setting on the base bottom surface of circumference, be provided with return spring 2372 in the slotted hole, return spring's lower extreme is provided with steel ball 2373, the up end of bottom plate is provided with the pit 2374 that a plurality of matches the steel ball, the third of steel ball diameter falls into in the pit.
In this embodiment, by rotating the adjusting knob, the distance between the first clamping piece and the second clamping piece can be adjusted, the first clamping piece and the second clamping piece can be adjusted to clamp the protruding rod for fixing, and the first clamping piece and the second clamping piece can also be adjusted to move the protruding rod up and down for height adjustment; rubber gaskets are arranged on the contact surfaces of the first clamping piece and the second clamping piece with the convex rod, and threads are arranged on the periphery of the convex rod, so that a better fastening effect can be ensured; after the adjustment of the longitudinal adjusting mechanism is finished, the verification angle of the calibrator can be rotated by adjusting the horizontal adjusting mechanism, the calibration support is manually rotated, the calibration support rotates relative to the base, the steel ball rolls in the pit and retracts into the reset spring under the action of rotating force, the steel ball easily falls into an adjacent pit to realize a limiting effect, the pit is arranged at a circumferential position far away from the central point of the calibration support, the size and the distribution density of the pit directly determine the accuracy of the horizontal angle adjustment, therefore, the number of the pits circumferentially arranged in the calibration support is at least fifty, and the relative angle of the adjacent pits is 7.2 degrees.
The calibrating device is a color mark sensor, a plurality of scale marks are arranged on the edge of a last character wheel of a counter of the diaphragm gas meter, and during calibration, the detection end of the color mark sensor is over against an area containing the scale marks of the last character wheel.
In the embodiment, the white scale lines and the red chassis of the last character wheel of the mechanical counter are distinguished by utilizing the principle that the color mark sensor can identify different colors, so that the automatic reading verification work is realized, and the reading accuracy and reliability of the automatic verification of the gas meter are improved; the color identification technology of the color mark sensor is adopted to identify the scale mark of the last character wheel of the mechanical counter, the ground color of the dial is red, the scale mark is white, the colors of the dial and the scale mark are different, the color data measured by the color mark sensor changes when the counting character wheel rotates, and whether the scale mark and the counting are detected or not is distinguished. When the gas meter runs at a certain speed and the flow rate is stabilized at a verification flow rate point, the control box sends a starting instruction to the color mark sensor and the pulse counter, the pulse counter is cleared, the color mark sensor starts to identify the last-position character wheel scale mark, when the fact that a white scale mark passes through is detected, the high level is set, a counting pulse is sent to the pulse counter through a signal line, the fact that the bottom color of the character wheel is red is detected, namely the fact that the scale mark does not exist is set to be the low level, and the pulse is not sent. The pulse counter is positioned in the control box, accumulates the pulse quantity in the verification process, and further calculates the accumulated flow indicating value of the to-be-detected meter. According to the counting principle described above, the calculation formula for obtaining the gas accumulated flow indication value of the gas meter is as follows:
in the formula, V is the indication value of the gas accumulated flow of the detected meter, and the unit is L; v0The volume value of the last character wheel of the mechanical counter is rotated for one circle; n is the number of the scale marks of the last character wheel; n is the number of counting pulses; for example, the volume of gas passing through the last digit wheel of a mechanical counter by one rotation is 10L, and the number of the scale lines of the last digit wheel is 50, so that the gas accumulated flow indication value calculation formula of the gas meter is obtained;
the counting pulse number obtained in the verification process is collected, the accumulated flow indication value of the to-be-detected meter is calculated through the calculation formula, and the upper computer obtains corresponding data such as the pulse number, the accumulated flow value and the like. The mode of recognizing the scale marks of the last character wheel is adopted, namely the number of the scale marks rotating to a certain fixed position is counted to perform pulse counting, so that the recognition precision is higher, the verification error is smaller, and the result is more accurate.
As shown in fig. 6, the pressure stabilizer includes a pressure stabilizing chamber 66, a flow stabilizing pipe 67 penetrating through the pressure stabilizing chamber, a first flow stabilizer 61, a second flow stabilizer 62, an overflow device 65, a first linkage 63 and a second linkage 64 arranged at the upper end of the flow stabilizing pipe, the first flow stabilizer and the second flow stabilizer are sequentially communicated with the flow stabilizing pipe, the two ends of the flow stabilizing pipe are communicated with air pipes, the first flow stabilizer and the second flow stabilizer are linked through the first linkage, the overflow device is communicated with the second flow stabilizer through the air pipes, the second linkage is used as a communication switch to realize the communication and the disconnection of the overflow device and the second flow stabilizer, and the return end of the overflow device is communicated with the air inlet end of the recovery tank.
In this embodiment, the first current stabilizer operates to regulate the gas flow in the flow stabilizing pipe, when the first current stabilizer reaches a regulation threshold, the first linkage device is triggered, the first linkage device drives the second current stabilizer to perform a regulation operation, when the second current stabilizer reaches the regulation threshold, the second linkage device is triggered, the overflow device is communicated with the second current stabilizer to achieve a pressure relief function, the gas flow in the flow stabilizing pipe can be rapidly and stably kept to approach a stable value by adjusting layer by layer, and the safety of gas delivery is ensured.
As shown in fig. 7, the first current stabilizer includes a first current stabilizing cylinder communicated with the current stabilizing pipe, a first isolation block 613 dividing the first current stabilizing cylinder into a first sliding cavity 611 and a first recovery cavity 612, a first sliding block 614 slidably connected with the inner wall of the sliding cavity, and a first connecting rod 615 having one end fixedly connected with the first sliding block and penetrating through the first isolation block 613; the other end of the first connecting rod extends to the first recovery cavity and is fixedly connected with the first permanent magnet 616, one end of the first spring 617 is arranged at the top end of the recovery cavity, and the other end of the first spring is fixedly connected with the first permanent magnet.
As shown in fig. 8, the second current stabilizer includes a second current stabilizing cylinder, a second isolating block 623 dividing the second current stabilizing cylinder into a second sliding cavity 621 and a second restoring cavity 622, a second sliding block 624 slidably connected to the inner wall of the sliding cavity, and a second connecting rod 625 having one end fixedly connected to the second sliding block and penetrating through the second isolating block 623; the other end of the second connecting rod extends to the second recovery cavity and is fixedly connected with the iron block 626, one end of a second spring 627 is arranged at the top end of the recovery cavity, and the other end of the second spring is fixedly connected with the iron block.
As shown in fig. 9, the first linkage is disposed between the first current stabilizer and the second current stabilizer; the first linkage device comprises a first linkage cavity 631 communicated with the upper part of the first recovery cavity, a first I-shaped block 632 arranged in the first linkage cavity and capable of recovering through a first recovery spring 633, and a first traction device arranged in a first traction cavity 634, wherein one end of the first I-shaped block is provided with a magnetic block repulsive to the pole of a first permanent magnet, the bottom of one end of the first I-shaped block is provided with a grinding tooth, the first traction device comprises a first T-shaped frame 635 erected in the first traction cavity, a cross arm of the first T-shaped frame is provided with a first gear 638 meshed with the grinding tooth, a vertical arm of the first T-shaped frame is provided with a first pulley 637, the first gear is coaxially and fixedly provided with a first coiling disc 636, a first clamping hole is transversely formed in the second isolation block, a first clamping rod 639 is arranged in the first clamping hole, and the first clamping rod realizes recovery through a spring arranged in the clamping hole, the first groove matched with the first clamping rod is formed in the second connecting rod, and one end of the metal wire is connected with the first clamping rod and wound on the first pulley to be connected with the first wire winding disc.
In this scheme, first permanent magnet is because the regulatory action of first sliding block goes upward along first slip chamber and reachs the regulation threshold value, first permanent magnet reachs with first worker shape piece co-altitude, because the one end of first worker shape piece is provided with the magnetic path that repels mutually with first permanent magnet ferromagnetism, therefore, first worker shape piece receives the repulsion force effect and slides in first linkage intracavity, because the meshing of first worker shape piece and first gear, order about first reel rotation, the metal wire of first reel pulls first kelly and makes kelly and first recess break away from, the second connecting rod can reciprocate, make the second sliding block can go upward the removal realize regulatory function.
As shown in fig. 10, the second linkage device includes a second linkage chamber adjacent to the second sliding chamber wall, a pressing block 641 press-linked with the second sliding block, and a blocking rod 643 disposed in the second linkage chamber 642 and linked with the pressing block; the lower end of the blocking rod is provided with a rubber sleeve 644 with a sealing function, the lower end of the blocking rod is positioned at a communicating part of the overflow device and the second sliding cavity, the upward movement of the blocking rod can realize the smoothness of gas at the communicating part, the downward movement of the blocking rod can realize the blockage of gas at the communicating part, the transverse return movement of the pressing block is realized through a spring, one end of the pressing block, which extends into the second sliding cavity, is an arc convex head, and the contact surface of the second sliding block and the arc convex head is an arc surface; the one end bottom surface that the pressing block stretched into the second linkage chamber is provided with the wedge, the upper end and the wedge of shutoff pole are contradicted, the shutoff pole sets up at the second linkage intracavity through last spacing ring and spacing ring activity down, and the middle part of shutoff pole is provided with spacing piece 645, and spacing piece is connected through spring and lower spacing ring and is makeed the shutoff pole to do the motion of replying.
In this embodiment, when the second linkage did not trigger, overflow arrangement and second slip chamber blockked up through the shutoff pole and realized isolated effect, when the second linkage triggered, the second sliding block went upward and realized regulatory function, the second regulating block reaches the top in second slip chamber, because the second sliding block sets up to the arcwall face with the contact surface of circular arc plush head, can the smooth circular arc plush head of pressing of silky, press fast to the horizontal shrink of second linkage chamber, because the structural action of wedge, the shutoff pole is under the effect of the restoring force of spring, upward movement, therefore, overflow arrangement and the shutoff department in second slip chamber are opened, gaseous quick overflow arrangement that gets into realizes regulatory function.
The overflow device comprises a vacuum cavity (not shown), a compression cavity (not shown) and a backflow tank (not shown), the vacuum cavity is communicated with the second sliding cavity through an air pipe, backflow gas in the vacuum cavity is compressed and guided into the backflow tank through a compressor in the compression cavity, the backflow tank is communicated with the recovery tank through the air pipe, and the volume of the first sliding cavity is at least 1.5 times larger than that of the second sliding cavity.
The above-mentioned embodiments are preferred embodiments of the system for automatically calibrating a diaphragm gas meter based on a color scale sensor according to the present invention, and the scope of the present invention is not limited thereto, and all equivalent changes in shape and structure according to the present invention are within the protection scope of the present invention.
Claims (10)
1. The automatic diaphragm gas meter calibration system based on the color mark sensor is characterized by comprising a gas storage tank, a pressure regulating valve, a pressure stabilizing device, a standard meter, a calibration device, a recovery tank and a microprocessor, wherein the gas storage tank, the pressure regulating valve, the pressure stabilizing device, the standard meter, the calibration device and the recovery tank are sequentially communicated through a gas pipe, and the pressure stabilizing device, the standard meter and the calibration device are respectively in communication connection with the microprocessor; the calibrating device comprises a calibrating platform, a plurality of turnover calibrating mechanisms arranged on a cross arm of the calibrating platform, and a plurality of tables to be calibrated arranged at the lower ends of the turnover calibrating mechanisms, wherein the turnover calibrating mechanisms are respectively in communication connection with the microprocessor.
2. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 1, wherein the turnover type verification mechanism comprises a turnover mechanism mounted on the verification table, a support rod with one end connected with the movable part of the turnover mechanism, a fine adjustment mechanism connected with the other end of the support rod, and a calibrator connected with the fine adjustment mechanism, and the control end of the turnover mechanism and the signal acquisition end of the calibrator are respectively and electrically connected with the microprocessor; the turnover mechanism comprises a turnover box, a steering engine arranged in the turnover box and a loop bar detachably connected with an output shaft of the steering engine, the loop bar is fixedly connected with a support bar, the turnover mechanism is fixedly arranged on a cross arm of the detection table through screws, and a control end of the steering engine is electrically connected with a control end of the microprocessor.
3. The automatic diaphragm gas meter verification system based on the color scale sensor as claimed in claim 1 or 2, wherein the fine adjustment mechanism comprises a convex hollow sleeve and a verification bracket movably connected with the hollow sleeve; the detection support is provided with a detector, the hollow sleeve is fixedly connected with the support rod, and the hollow sleeve is internally provided with a longitudinal adjusting mechanism; the longitudinal adjusting mechanism comprises a base sleeved with the hollow sleeve, a convex rod arranged on the base, a spring, a screw rod penetrating through the side end of the hollow sleeve, adjusting knobs arranged at two ends of the screw rod, a first clamping piece and a second clamping piece which are symmetrically screwed on the screw rod, and a limiting rod penetrating through the side end of the hollow sleeve and sleeved with the first clamping piece and the second clamping piece, wherein one end of the spring is connected with the top end of the convex rod, and the other end of the spring is connected with the top end of the hollow sleeve; threads in opposite directions are arranged at two ends of the screw rod in central symmetry, the first clamping piece and the second clamping piece are respectively in threaded connection with the threads, rubber gaskets are arranged on contact surfaces of the first clamping piece and the second clamping piece with the convex rod, and threads are arranged on the whole body of the convex rod; be provided with between the bottom plate of base and examination support and be used for the spacing horizontal adjustment mechanism of level, the edge of base and bottom plate cup joints and makes it rotate by the level, horizontal adjustment mechanism includes a plurality of slotted holes that become the circumference and radially set up on the base bottom surface, be provided with the answer spring in the slotted hole, the lower extreme of answer spring is provided with the steel ball, the up end of bottom plate is provided with the pit that a plurality of matches the steel ball, the third of steel ball diameter falls into in the pit.
4. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 2, wherein the verifier is the color mark sensor, the edge of the last print wheel of the counter of the diaphragm gas meter is provided with a plurality of scale marks, and during verification, the detection end of the color mark sensor is opposite to the area containing the scale marks of the last print wheel.
5. The automatic diaphragm gas meter verification system based on the color code sensor as claimed in claim 1 or 2, wherein the pressure stabilizer comprises a pressure stabilizing chamber, a flow stabilizing pipe penetrating through the pressure stabilizing chamber, a first flow stabilizer, a second flow stabilizer, an overflow device, a first linkage device and a second linkage device, the first flow stabilizer and the second flow stabilizer are arranged at the upper end of the flow stabilizing pipe and are sequentially communicated with the flow stabilizing pipe, gas pipes are communicated with two ends of the flow stabilizing pipe, the first flow stabilizer and the second flow stabilizer are linked through the first linkage device, the overflow device is communicated with the second flow stabilizer through the gas pipes, the second linkage device is used as a communication switch to realize communication and disconnection of the overflow device and the second flow stabilizer, and the return end of the overflow device is communicated with the gas inlet end of the recovery tank.
6. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 5, wherein the first current stabilizer comprises a first current stabilization cylinder communicated with the current stabilization pipe, a first isolation block dividing the first current stabilization cylinder into a first sliding cavity and a first recovery cavity, a first sliding block slidably connected with the inner wall of the sliding cavity, and a first connecting rod having one end fixedly connected with the first sliding block and penetrating through the first isolation block; the other end of the first connecting rod extends to the first recovery cavity and is fixedly connected with the first permanent magnet, one end of the first spring is arranged at the top end of the recovery cavity, and the other end of the first spring is fixedly connected with the first permanent magnet.
7. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 5, wherein the second current stabilizer comprises a second current stabilization cylinder, a second isolation block dividing the second current stabilization cylinder into a second sliding cavity and a second recovery cavity, a second sliding block slidably connected with the inner wall of the sliding cavity, and a second connecting rod having one end fixedly connected with the second sliding block and penetrating through the second isolation block; the other end of the second connecting rod extends to the second recovery cavity and is fixedly connected with the iron block, one end of the second spring is arranged at the top end of the recovery cavity, and the other end of the second spring is fixedly connected with the iron block.
8. The system for automatically calibrating a diaphragm gas meter based on a color scale sensor according to claim 5, wherein the first linkage device is arranged between a first current stabilizer and a second current stabilizer; the first linkage device comprises a first linkage cavity communicated with the upper part of the first recovery cavity, a first I-shaped block arranged in the first linkage cavity and realizing recovery through a first recovery spring, and a first traction device arranged in the first traction cavity, wherein one end of the first I-shaped block is provided with a magnetic block repulsive to the magnetic pole of a first permanent magnet, the bottom of one end of the first I-shaped block is provided with a grinding tooth, the first traction device comprises a first T-shaped frame erected in the first traction cavity, a cross arm of the first T-shaped frame is provided with a first gear meshed with the grinding tooth, a vertical arm of the first T-shaped frame is provided with a first pulley, a first coiling disc is coaxially and fixedly arranged on the first gear, a first clamping hole is transversely formed in the second isolation block, a first clamping rod is arranged in the first clamping hole, and the first clamping rod realizes recovery through the spring arranged in the clamping hole, the first groove matched with the first clamping rod is formed in the second connecting rod, and one end of the metal wire is connected with the first clamping rod and wound on the first pulley to be connected with the first wire winding disc.
9. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 7 or 8, wherein the second linkage device comprises a second linkage cavity adjacent to the wall of the second sliding cavity, a pressing block in press-type linkage with the second sliding block, and a blocking rod arranged in the second linkage cavity and linked with the pressing block; the lower end of the blocking rod is provided with a rubber sleeve with a sealing function, the lower end of the blocking rod is positioned at a communicating part of the overflow device and the second sliding cavity, the upward movement of the blocking rod can realize the smoothness of gas at the communicating part, the downward movement of the blocking rod can realize the blockage of gas at the communicating part, the transverse return movement of the pressing block is realized through a spring, one end of the pressing block, which extends into the second sliding cavity, is an arc convex head, and the contact surface of the second sliding block and the arc convex head is an arc surface; the one end bottom surface that the pressing block stretched into the second linkage chamber is provided with the wedge, the upper end and the wedge of shutoff pole are contradicted, the shutoff pole sets up at the second linkage intracavity through last spacing ring and lower spacing ring activity.
10. The automatic diaphragm gas meter verification system based on the color mark sensor as claimed in claim 5, wherein the overflow device comprises a vacuum chamber and a compression chamber, the vacuum chamber is communicated with the second sliding chamber through a gas pipe, the return gas in the vacuum chamber is compressed by a compressor in the compression chamber and introduced into the return tank, and the return tank is communicated with the recovery tank through a gas pipe.
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| CN114863415A (en) * | 2022-07-07 | 2022-08-05 | 广州能源检测研究院 | Diaphragm gas meter reading identification method and device based on projection segmentation method |
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