CN204758091U - Level gauge automatic measurement calibrating installation - Google Patents
Level gauge automatic measurement calibrating installation Download PDFInfo
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- CN204758091U CN204758091U CN201520430326.8U CN201520430326U CN204758091U CN 204758091 U CN204758091 U CN 204758091U CN 201520430326 U CN201520430326 U CN 201520430326U CN 204758091 U CN204758091 U CN 204758091U
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Abstract
The utility model relates to a level gauge automatic measurement calibrating installation belongs to measuring device technical field, is applicable to the examination of other level gauges except that side dress level gauge, pressure type level gauge, capacitance level gauge. Automatic measurement calibrating installation includes level gauge position control subassembly, liquid level control assembly, data acquisition and control system. Level gauge position control subassembly includes linear motion unit, motion unit support frame, servo motor, level gauge support frame, is examined the level gauge to install on the level gauge support frame, liquid level control assembly includes nonrust steel pipe, overflow mouth, solution feed pump, flood pump, realizes that the accuracy of liquid level reappears, data acquisition control system includes computer, controller, data acquisition module, sensor, servo driver, and the sensor includes temperature sensor, pressure sensor, many ring absolute encoders. The utility model has the advantages of keep the liquid level unchangeable, the level gauge is accurate to be removed, realizes the evaluation of quick accurate metrological verification of level gauge and metering performance.
Description
Technical field
The utility model belongs to the apparatus and method of in metering field, measurement instrument being carried out to automatic Verification, in particular to the automatic gauge calibrating of liquid level gauge and the apparatus and method of metering performance assay, be applicable to the calibrating of other liquid level gauges except side dress liquid level gauge, pressure-type liquidometer, non-capacitive liquid level gauge.With other liquid level meter detecting devices compared with method, the utility model keeps liquid level constant, and liquid level gauge is movement accurately, realizes quick and precisely measurement verification and the metering performance evaluation of liquid level gauge.
Background technology
Level gauging observe at petroleum-based energy, the rivers hydrology manufacture with monitoring, medication chemistry, metallurgy, the various industry such as water treatment and supply, special in petroleum chemical industry and carrier, extensively carry out in the accumulating and trade transaction of oil and product oil, liquid chemical product etc.According to measurement liquid level time the need of the parts contacted with measuring media, level measuring method is divided into contact measurement method and contactless measurement.Device for measuring liquid level is called liquid level gauge or liquid level meter.As the measurement instrument of compulsory verification, liquid level gauge must could be used for metering after assay approval.
Initial liquid level gauge detection method is the method that the hand gauging method measurement data of non-automated directly compares with liquid level gauge reading.Hand gauging method occurs level measuring method comparatively early, uses with the metric system steel band tape measure of weight or the method with graduated tape measure liquid level, hand-kept reading.By directly comparing of hand gauging method measurement data and liquid level gauge reading, liquid level gauge is carried out to the evaluation of calibrating, metering performance.
JJG971-2002 liquid level gauge describes the method for manually calibrating liquid level gauge, and instrument equipment is as shown in the table.
According to the type of tested liquid level gauge during calibrating, from table, combine required standard and support equipment.
When liquid level gauge range is not more than 2m, liquid level gauge is directly installed on calibrating water tank and examines and determine, usual employing aligning is tested sees that the method for standard or alignment criteria see tested method, that is: the water level of calibrating water tank is reconciled, from zero-bit gradually water level raising to liquid level gauge indicate each calibrating point or standard instruction each calibrating point, until the upper limit; Then, each calibrating point that water level indicates to liquid level gauge is reduced gradually, until lower limit.The water level indicating value of water tank or the indicating value of each calibrating point liquid level gauge is read respectively at each calibrating point.
When range is greater than 2m, then according to the type of liquid level gauge, to simulate the method for liquid level, float-type or floating ball type liquid-level meter, pressure-type liquidometer, reflex gage, capacitance level gauge are examined and determine.To float-type (or float-ball type) liquid level gauge: during calibrating, with manual mobile float (ball float), use steel tape to measure the displacement of float (ball float) as actual liquid level, record the indicating value of liquid level gauge simultaneously.To pressure-type liquidometer: use normal pressure generator to produce pressure simulation actual liquid level during calibrating, record the indicating value of liquid level gauge simultaneously.By both pressure ratio to realizing calibrating to tested liquid level gauge, be converted to liquid level gauge height by pressure-type liquidometer mathematical model.To reflex gage: by reflecting plate that the sensor alignment of liquid level gauge is vertically placed during calibrating.Using distance liquid level be greater than range certain point as zero point, gradually near and leave rising and the reduction of simulating liquid level.To capacitance level gauge: simulate actual liquid level with standard capacitor during calibrating, record the indicating value of liquid level gauge simultaneously.
The return difference of the calibrating point that JJG971-2002 liquid level gauge specifies, error of indication calibrating, the differential gap of set point calibrating, set point error calibrating, liquid level gauge output signal error testing.Need to record mass data in calibrating record, each verification result need be obtained according to formulae discovery.
In sum, existing liquid level meter detecting device and method mostly adopt liquid level gauge to keep motionless, manually enter discharge opeing change liquid level and reading, to the calibration method that the actual liquid level measured value of standard set-up, tested liquid level gauge compares.Due to drainage when liquid level changes and liquid level stabilizing required time long, liquid level standard value reproduction repeatability is poor, and complicated operation, calibrating efficiency are lower, are difficult to meet the requirement of liquid level gauge calibrating.The simulation liquid level adopted when being particularly greater than 2m replaces the method for true liquid level, and giving no thought to true liquid level affects liquid level gauge measurement performance with simulation liquid level, increases the uncertainty of liquid level gauge level gauging and verification result.Calibrating data processing is also the complicated processes needing the plenty of time.In order to realize the automatic Verification of liquid level gauge, better evaluation being made to the metering performance index of liquid level gauge, effectively confirming whether liquid level gauge is qualified, need the liquid level gauge automatic gauge calibrating installation that research meets liquid level gauge calibrating requirement badly.
Utility model content
The utility model object is the present situation for liquid level gauge calibrating, a kind of liquid level gauge automatic gauge calibrating installation is proposed, integrated use calibrating new principle, that is: overflow vent accurately reappears liquid level, the accurately movement of liquid level gauge relative liquid surface, by parameters such as liquid level ranges, and measure the displacement, temperature etc. of liquid level gauge relative liquid surface, obtain liquid level calibrated altitude accurately; By with the comparing of liquid level gauge measured value, obtain the verification result of liquid level gauge.
A kind of liquid level gauge automatic gauge calibrating installation, comprises liquid level gauge position control assembly (1), Liquid level assembly (2), Data Acquisition and Conversion System (DACS) (3); Described liquid level gauge position control assembly (1), it is characterized in that, comprise linear motion unit (11), moving cell bracing frame (12), servomotor (13), liquid level gauge bracing frame (14), tested liquid level gauge is arranged on liquid level gauge bracing frame (14); Described Liquid level assembly (2), comprises stainless-steel tube (21), overflow vent (22), solution feed pump (23), flood pump (24), motorized valve (25), realizes the accurate reproduction of liquid level; Described data acquisition control system (3) comprises computing machine (31), controller (32), data acquisition module (33), servo-driver (34), relay module (35), sensor, and sensor comprises temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363);
Wherein, the linear motion unit (11) of described liquid level gauge position control assembly (1) is vertically installed on moving cell erecting frame (12), liquid level gauge bracing frame (14) level is arranged on the slide block (111) of linear motion unit (11), 3 tested liquid level gauges can be installed simultaneously, servomotor (13) drives linear motion unit vertical up-or-down movement, drive liquid level gauge bracing frame (14) mobile, realize the accurate location of tested liquid level gauge;
Wherein, described Liquid level assembly (2), stainless-steel tube (21) is as the container of calibrating liquid, overflow vent (22) is for reappearing liquid level, solution feed pump (23) for examine and determine the liquid page lower than during overflow vent (22) level to fluid infusion in stainless-steel tube, flood pump (24) when liquid level is higher than overflow vent (22) plane, forced overflow; Motorized valve (25) is for controlling to feed flow in stainless-steel tube or forced overflow;
Wherein, described data acquisition control system (3) comprises computing machine (31), controller (32), RS485 data acquisition module (33), servo-driver (34), RS485 relay module (35), sensor comprise temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363); Computing machine (31) is by optical fiber and controller (32) communication, controller (32) by the sensor communication such as RS485 data acquisition module (33), servo-driver (34), RS485 relay module (35) and temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363), the digital signal of collecting temperature, pressure simulation signal and multi-turn absolute encoder.Controller (32) and RS485 relay module (35) communication, for controlling the opening of solution feed pump (23) and flood pump (24), stopping; Controller (32) and motorized valve (25) communication, send instruction to motorized valve (25), the keying of by-pass valve control.
Further, described liquid level gauge automatic gauge calibrating installation, computing machine (31) is provided with PCI optical-fibre communications card hardware (311), by optical fiber and controller (32) communication; Described controller (32) is equipped with PXI optical-fibre communications card (320), RS485 address card (321), Canopen motion control card (322), controller (32) accepts the Control & data acquisition order that computing machine (31) sends, and the data of collection are transferred to computing machine (31).
Further, liquid level gauge bracing frame (14) comprises hard-wired large flange (121), interchangeable little flange (122), riser 1 (123), riser 2 (124) and leveling board (125) further, tested liquid level gauge is fixed on large flange (121) by little flange (122), moves up and down with liquid level gauge bracing frame (12).
In the utility model, in order to examine and determine 3 liquid level gauges simultaneously, propose the liquid level gauge mounting flange that a kind of material is 7075T ultralumin, primary mounting surface depth of parallelism is less than 0.05mm, roughness is less than 0.05mm for it, comprises hard-wired large flange and interchangeable little flange.By little flange, liquid level gauge is fixed on large flange, moves with large flange.
In order to accurately control the accurate location of liquid level gauge, described linear motion unit is enclosed construction, servomotor has multi-turn absolute encoder, and its repetitive positioning accuracy is ± 0.01mm, and the resolution of multi-turn absolute encoder 27, precision ± 0.333 arc divides.
Described multi-turn absolute encoder uses as standard after demarcating, and goes forward side by side after trip temperature correction, the encoder data of collection can be converted to accurate liquid level gauge position by the temperature measuring linear motion unit in real time.
The liquid level gauge automatic gauge calibrating installation that the utility model is researched and developed comprises liquid level gauge position control assembly, Liquid level assembly, Data Acquisition and Conversion System (DACS).Essence comprises computer acquisition Control System Software and data acquisition, control hardware part.The effect of described acquisition control system software is the management such as amendment carrying out system basic parameter, liquid level gauge information, according to the information of tested liquid level gauge, Lookup protocol measuring point number, measuring point, and according to user to the selection of measuring type and number of strokes, automatically examine and determine.The data such as temperature, pressure, electric current that the collection of inspection timing automatic is relevant, and relevant information is presented in current interface, all calibrating data and liquid level gauge relevant information are saved in database.Examine and determine complete, automatically calibrating raw data is processed, finally generate liquid level gauge calibrating raw readings and calibration certificate (or rejection notice of verification, calibration certificate, test certificate).
Described computing machine is by collection, control module, motion control card and controller, obtain encoder data, temperature, pressure and liquid level gauge data, according to liquid level gauge range, measuring point number, set point, setting liquid level gauge movement space, and then send steering order, control described servomotor action, liquid feeding pump and the start and stop of flood pump, the keying of motorized valve, and finally calculate standard liquid level corresponding to measuring point, realize the collection of test solution level sensor and standard liquid level.
In concrete practice, pressure transducer, for liquid level during Real-Time Monitoring feed liquor, makes feed liquor height be consistent.The liquid level data of computer real-time monitoring, when liquid level reaches setting value, water pump stops.Computing machine controlling water kick motorized valve is opened, and flood pump work, to setting-up time, carries out pressure discharge opeing by the overflow vent of overflow block.
The utility model is applied in order to coupled system, and have also developed the metering method of liquid level gauge metering performance, the method comprises the following steps,
1. according to type, range, the setting assay intervals of tested liquid level gauge, measure the parameter such as type, number of times, automatically generate measuring point number and the calibrating sequence data such as measuring point data, scrambler target data corresponding to measuring point and detection record numbering; When described measuring point comprises set point, measuring point number totally 7 is 5%, 10%, 25%, 50%, 75%, 90%, 95% of liquid level gauge range; When described measuring point does not comprise set point, measuring point number totally 5 is 5%, 25%, 50%, 75%, 95% of liquid level gauge range.
2., according to the liquid level that pressure transducer is measured, start if be less than setting value solution feed pump;
3., close altitude information with pump in system initialization parameter and compare, judge whether to stainless-steel tube water filling;
4., by the measuring point data detected in sequence, each measuring point multi-turn absolute encoder target data is converted into;
5., servomotor action, if multi-turn absolute encoder data are consistent with target data, then motor stops;
6., according to systematic parameter, controlling water kick motorized valve is at wait t
1after time, open;
7., controlling water kick pump startup, work t
2stop after time, wait for t
3time;
8., instruction is sent, collecting temperature, encoder data;
9., judge whether liquid level gauge measuring point reaches the maximum or minimum value of stroke, if not, continues the detection of this stroke; Otherwise, start the operation to revesal;
10., computing machine judges whether liquid level gauge measuring point reaches setting value, if not, continues to detect; Otherwise, detect and terminate;
Step 3. described in pump close the setting value highly read from database for system initialization;
Step 6. described in stand-by period t
1for the setting value that system initialization reads from database;
Step 7. described in stand-by period t
1for the setting value that system initialization reads from database;
The utility model Plays liquid level refers to the liquid level under standard temperature 20 DEG C of conditions;
In the utility model, according to encoder for servo motor data, temperature sensor data, pressure sensor data that each measuring point gathers, calculate the standard liquid level of each measuring point;
Calibrating terminates, and calibrating data are saved in database;
According to the type of detection record numbering, calibrating stroke, carry out data processing, comprising:
(4 ~ 20) mA current value of tested liquid level gauge corresponding for each measuring point is converted into corresponding level value (mm);
Calculate the error of indication corresponding to each measuring point, return difference;
Calculate the differential gap of each set point, set point error;
Calculate the permissible error of liquid level gauge, judge that whether liquid level gauge verification result is qualified;
Automatic generation calibrating raw readings/calibration certificate.
Real-time Collection absolute multi-turn absolute encoder data, temperature, pressure sensor data in the utility model, be converted to standard liquid level, compare with the liquid level gauge level value measured in real time, automatically each measurement data is saved in database, data processing obtains verification result; By the multi-turn absolute encoder of servomotor, accurately control liquid level gauge position.Measuring process need not human intervention, simplifies operating process, automatic acquisition and processing data, generates and measures raw readings/probation redport, and calculate without the need to manual measurement, record and aftertreatment, automaticity is high, is easy to operation, is applicable to the laboratory verification of liquid level gauge.
Accompanying drawing explanation
Describe exemplary embodiment of the present utility model in more detail by referring to accompanying drawing, above and other aspect of the present utility model and advantage will become and more be readily clear of, in the accompanying drawings:
The one-piece construction schematic diagram of the liquid level gauge automatic gauge calibrating installation (hardware components) that Fig. 1 the utility model provides.
The structural front view of the liquid level gauge bracing frame that Fig. 2 the utility model provides.
Fig. 2 (a) is the structure left view of the liquid level gauge bracing frame that the utility model provides.
The structure vertical view of the liquid level gauge bracing frame that Fig. 2 (b) the utility model provides.
The structural representation of the Liquid level assembly (not containing solution feed pump and flood pump) that Fig. 3 the utility model provides.
The Data Acquisition and Conversion System (DACS) schematic diagram that Fig. 4 the utility model provides.
The schematic diagram of the standard level gauging that Fig. 5 the utility model provides.
The control flow schematic diagram of the liquid level gauge calibration method that Fig. 6 the utility model provides.
Embodiment
Hereinafter, more fully the utility model is described with reference to the accompanying drawings, various embodiment shown in the drawings.But the utility model can be implemented in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, provide these embodiments to make the disclosure will be thoroughly with completely, and scope of the present utility model is conveyed to those skilled in the art fully.
Hereinafter, with reference to the accompanying drawings exemplary embodiment of the present utility model is described in more detail.
As shown in Figure 1, a kind of liquid level gauge automatic gauge calibrating installation (hardware components), comprises liquid level gauge position control assembly 1, Liquid level assembly 2 and data acquisition control system 3.In figure, the linear motion unit 11 of liquid level gauge position control assembly 1 is vertically installed on moving cell erecting frame 12, liquid level gauge bracing frame 14 level is arranged on the slide block 111 of linear motion unit 11, tested liquid level gauge is arranged on liquid level gauge bracing frame 14, servomotor 13 drives linear motion unit vertical up-or-down movement, drive liquid level gauge bracing frame 13 to move, realize the accurate location of tested liquid level gauge.The stainless-steel tube 21 of Liquid level assembly 2 is as the container of calibrating liquid, and overflow vent 22 is for accurately reappearing liquid level.Described data acquisition control system 3, the simulating signal of sensor and the digital signals of absolute multi-turn scrambler 363 such as Real-time Collection temperature sensor 361, pressure transducer 362, control the position of tested liquid level gauge by servomotor 13.
As shown in Figure 1, Figure 2, shown in Fig. 2 (a), Fig. 2 (b), the large flange 121 that liquid level gauge bracing frame 14 is finish-machined to by 7075T ultralumin, little flange 122, riser 123, riser 124, leveling board 125 form, and are fastened by bolts into rigid support; On large flange 121, level is arranged on leveling board, and can be provided with 3 interchangeable little flanges 122, each little flange 122 all can install 1 tested liquid level gauge simultaneously.Riser 123 moves up and down with slide block 111, drives the accurately movement of tested liquid level gauge.
As shown in Fig. 1, Fig. 3, Fig. 4, Liquid level assembly 2, comprises stainless-steel tube 21, overflow vent 22, temperature sensor 361, pressure transducer 362, solution feed pump 23, flood pump 24, motorized valve 25.Overflow vent 22 is for accurately reappearing liquid level, and temperature sensor 361, pressure transducer 362 are for measuring overflow vent 22 place fluid temperature, pressure.The temperature that temperature sensor 361 is measured, for the correction of standard liquid level; The pressure data that pressure transducer 362 is measured is used for controlling to stainless-steel tube 21 feed flow; When in stainless-steel tube 21, liquid level is lower than setting value, solution feed pump 23 starts, to stainless-steel tube 21 feed flow; During point position, flood pump 24 starts forced overflow.The forced overflow of Liquid level assembly 2, shortens the calibrating time.
As shown in Figure 4, data acquisition control system 3 comprises computing machine 31, controller 32, RS485 data acquisition module 33, servo-driver 34, RS485 relay module 35, sensor, and sensor comprises temperature sensor 361, pressure transducer 362, absolute multi-turn scrambler 363.Computing machine 31 is by optical fiber and controller 32 communication, controller 32 passes through the sensor communication such as data acquisition module 33, servo-driver 34, relay module 35 and temperature sensor 361, pressure transducer 362, multi-turn absolute encoder 363, the digital signal of collecting temperature, pressure simulation signal and multi-turn absolute encoder.Controller 32 and RS485 relay module 35 communication, for controlling the opening of solution feed pump 23 and flood pump 24, stopping; Controller 32 and motorized valve 25 communication, send instruction to motorized valve 25, the keying of by-pass valve control.
As shown in Figure 5, the utility model Plays level gauging principle is: by measuring R during tested liquid level gauge initial position
0, T
0, t
0, h
0(=0) and the tested liquid level gauge R when certain measuring point i position
i, T
i, t
i, h
i.Standard liquid level height H is calculated by formula (I):
H＝{R
0×[1+α
1×(T
0-20)]-R
i×[1+α
1×(T
i-20)]+l×α
2×(t
i-t
0)}(I)
Wherein: α
1, be the linear thermal expansion coefficient of moving cell mounting bracket;
α
2, be the linear thermal expansion coefficient of stainless-steel tube;
R
0, be absolute encoder data during initial position;
T
0, be the moving cell mounting bracket temperature value of temperature sensor measurement during initial position, DEG C;
T
0, be the stainless-steel tube temperature value of temperature sensor measurement during initial position, DEG C;
R
i, be absolute encoder data during certain point position;
T
i, be the moving cell mounting bracket temperature value of temperature sensor measurement during certain point position, DEG C;
T
i, be the stainless-steel tube temperature value of temperature sensor measurement during certain point position, DEG C;
L, when 20 DEG C, overflow vent is apart from steel pipe distance from bottom;
As shown in Figure 6, be a kind of control flow of liquid level gauge automatic Verification method.Instantiation is: before entering calibrating, and system carries out initialization, from data base call system basic parameter, determines to enter calibrating procedure, starts calibrating according to following steps:
A, click enter detection;
B, input/tested liquid level gauge Detection Information of selection input, as sequence number, applying unit, manufacturer, measuring point number stroke etc.;
C, click " initialization " button, send instruction, 03#, 04# motorized valve 25 is in 2 valve position, and wait for 10s, solution feed pump 23 supplies water in stainless-steel tube 21;
When the force value that pressure transducer 362 is measured is greater than initialization, water pump cuts out height value × 9.804Pa, and solution feed pump 1 stops;
Send instruction, 01# motorized valve is opened, overflow vent 22 overflow;
03# motorized valve is in 1 valve position, 04# is in 2 valve position;
Servomotor 34 action, liquid level gauge mounting bracket 14 rises to 5600mm place, ejects dialog box, waits for that tested liquid level gauge installs confirmation;
D, confirm that tested liquid level gauge installs, liquid level gauge mounting bracket 14 drops to 3mm place.
E, 03# relay closes, solution feed pump 23 supplies water 5000ms in stainless-steel tube 21;
Flood pump 24 starts, forced overflow (stand-by period obtains from database);
F, flood pump 24 stop; Gather and record following data:
The position data (mm) that multi-turn absolute encoder 363 feeds back;
The resistance value that temperature sensor 361 is measured, calculates corresponding temperature, as the temperature of moving cell support 12, the temperature of stainless-steel tube 21;
The pressure transducer current value (4 ~ 20mA) of stainless-steel tube 21;
The current value (4 ~ 20mA) of tested liquid level gauge;
G, tested liquid level gauge move to next check point position;
H, repetition step f, g, h, until the trip terminates; If calibrating comprises positive and negative two strokes, start contrary stroke, again repeat step f, g, h, until the trip terminates;
If the number of strokes reaches setting value, enter step I; Otherwise, enter step e, f, g, h;
I detects end, manually preserves data, generates and detect original data record;
The foregoing is only embodiment of the present utility model, be not limited to the utility model.The utility model can have various suitable change and change.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. a liquid level gauge automatic gauge calibrating installation, is characterized in that comprising liquid level gauge position control assembly (1), Liquid level assembly (2), Data Acquisition and Conversion System (DACS) (3); Described liquid level gauge position control assembly (1), it is characterized in that, comprise linear motion unit (11), moving cell bracing frame (12), servomotor (13), liquid level gauge bracing frame (14), tested liquid level gauge is arranged on liquid level gauge bracing frame (14); Described Liquid level assembly (2), comprises stainless-steel tube (21), overflow vent (22), solution feed pump (23), flood pump (24), motorized valve (25), realizes the accurate reproduction of liquid level; Described data acquisition control system (3) comprises computing machine (31), controller (32), data acquisition module (33), servo-driver (34), relay module (35), sensor, and sensor comprises temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363); Wherein, the linear motion unit (11) of described liquid level gauge position control assembly (1) is vertically installed on moving cell erecting frame (12), liquid level gauge bracing frame (14) level is arranged on the slide block (111) of linear motion unit (11), 3 tested liquid level gauges can be installed simultaneously, servomotor (13) drives linear motion unit vertical up-or-down movement, drive liquid level gauge bracing frame (14) mobile, realize the accurate location of tested liquid level gauge;
Wherein, described Liquid level assembly (2), stainless-steel tube (21) is as the container of calibrating liquid, overflow vent (22) is for reappearing liquid level, solution feed pump (23) for examine and determine the liquid page lower than during overflow vent (22) level to fluid infusion in stainless-steel tube, flood pump (24) when liquid level is higher than overflow vent (22) plane, forced overflow; Motorized valve (25) is for controlling to feed flow in stainless-steel tube or forced overflow;
Wherein, described data acquisition control system (3) comprises computing machine (31), controller (32), RS485 data acquisition module (33), servo-driver (34), RS485 relay module (35), sensor comprise temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363); Computing machine (31) is by optical fiber and controller (32) communication, controller (32) by the sensor communication such as RS485 data acquisition module (33), servo-driver (34), RS485 relay module (35) and temperature sensor (361), pressure transducer (362), absolute multi-turn scrambler (363), the digital signal of collecting temperature, pressure simulation signal and multi-turn absolute encoder.Controller (32) and RS485 relay module (35) communication, for controlling the opening of solution feed pump (23) and flood pump (24), stopping; Controller (32) and motorized valve (25) communication, send instruction to motorized valve (25), the keying of by-pass valve control.
2. liquid level gauge automatic gauge calibrating installation according to claim 1, it is characterized in that: described liquid level gauge automatic gauge calibrating installation, computing machine (31) is provided with PCI optical-fibre communications card hardware (311), by optical fiber and controller (32) communication; Described controller (32) is equipped with PXI optical-fibre communications card (320), RS485 address card (321), Canopen motion control card (322), controller (32) accepts the Control & data acquisition order that computing machine (31) sends, and the data of collection are transferred to computing machine (31).
3. liquid level gauge automatic gauge calibrating installation according to claim 1, it is characterized in that: liquid level gauge bracing frame (14) comprises hard-wired large flange (121), interchangeable little flange (122), riser 1 (123), riser 2 (124) and leveling board (125) further, tested liquid level gauge is fixed on large flange (121) by little flange (122), moves up and down with liquid level gauge bracing frame (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520430326.8U CN204758091U (en) | 2015-06-20 | 2015-06-20 | Level gauge automatic measurement calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520430326.8U CN204758091U (en) | 2015-06-20 | 2015-06-20 | Level gauge automatic measurement calibrating installation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203188A (en) * | 2014-06-04 | 2015-12-30 | 中国石油化工股份有限公司 | Oil-water interface detector and oil tank liquid level meter calibrating device |
| CN110849233A (en) * | 2019-11-28 | 2020-02-28 | 中国计量科学研究院 | Online measurement method for effective volume of piston cylinder of piston type gas flow standard device |
| CN111780834A (en) * | 2020-07-21 | 2020-10-16 | 安东仪器仪表检测有限公司 | Calibration method of pressure liquid level meter |
| RU211876U1 (en) * | 2022-05-11 | 2022-06-27 | Общество с ограниченной ответственностью "Газпром трансгаз Чайковский" | AUTOMATED STAND FOR CALIBRATION OF LIQUID AND FLUID MEDIA LEVEL MEASUREMENTS |
-
2015
- 2015-06-20 CN CN201520430326.8U patent/CN204758091U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203188A (en) * | 2014-06-04 | 2015-12-30 | 中国石油化工股份有限公司 | Oil-water interface detector and oil tank liquid level meter calibrating device |
| CN105203188B (en) * | 2014-06-04 | 2021-07-13 | 中国石油化工股份有限公司 | Oil-water interface detector and oil tank level gauge calibrating device |
| CN110849233A (en) * | 2019-11-28 | 2020-02-28 | 中国计量科学研究院 | Online measurement method for effective volume of piston cylinder of piston type gas flow standard device |
| CN110849233B (en) * | 2019-11-28 | 2022-03-11 | 中国计量科学研究院 | Online measurement method for effective volume of piston cylinder of piston type gas flow standard device |
| CN111780834A (en) * | 2020-07-21 | 2020-10-16 | 安东仪器仪表检测有限公司 | Calibration method of pressure liquid level meter |
| RU211876U1 (en) * | 2022-05-11 | 2022-06-27 | Общество с ограниченной ответственностью "Газпром трансгаз Чайковский" | AUTOMATED STAND FOR CALIBRATION OF LIQUID AND FLUID MEDIA LEVEL MEASUREMENTS |
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