CN112412728A - Closed-loop infrared detection metering titration system - Google Patents
Closed-loop infrared detection metering titration system Download PDFInfo
- Publication number
- CN112412728A CN112412728A CN202011407665.6A CN202011407665A CN112412728A CN 112412728 A CN112412728 A CN 112412728A CN 202011407665 A CN202011407665 A CN 202011407665A CN 112412728 A CN112412728 A CN 112412728A
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- Prior art keywords
- pump
- titration
- infrared
- infrared receiver
- infrared transmitter
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- 238000004448 titration Methods 0.000 title claims abstract description 83
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 230000008054 signal transmission Effects 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000002572 peristaltic effect Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 241001397809 Hakea leucoptera Species 0.000 claims 2
- 239000012528 membrane Substances 0.000 claims 2
- 239000007788 liquid Substances 0.000 abstract description 21
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
- G06M1/272—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum using photoelectric means
Abstract
The invention discloses a closed-loop infrared detection and metering titration system, which detects titrated liquid drops through two groups of infrared receiving and transmitting devices, and meters the titration amount through how many liquid drops are dripped when a titration pump operates, so that the system can accurately know how much liquid is dripped when the titration pump operates, wherein the purpose of using the two groups of infrared receiving and transmitting devices is to ensure the accuracy of infrared identification; the titration cylinder is connected with the titration pump through a titration pipeline, a target titration cylinder is arranged below the titration pump, and a first infrared transmitter, a first infrared receiver, a second infrared transmitter and a second infrared receiver are arranged between the titration pump and the target titration cylinder; the control system is arranged on the pump body of the titration pump, and the control system is electrically connected with the titration pump, the first infrared transmitter, the first infrared receiver, the second infrared transmitter and the second infrared receiver through signal transmission cables.
Description
Technical Field
The invention discloses a titration system for closed-loop infrared detection metering, and belongs to the technical field of metering equipment.
Background
In the fields of laboratories, filling, breeding, water planting and the like, the traditional titration adopts open-loop titration, and the open-loop titration is characterized in that the amount of a titrated solution is judged by calculating the starting time of a pump.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a closed-loop infrared detection and metering titration system, which detects the titrated liquid drops through two groups of infrared receiving and transmitting devices and meters the titration amount through the dropping of the liquid drops when a titration pump runs, thereby ensuring that the system can accurately know the dropping of the liquid when the titration pump runs, wherein the two groups of infrared receiving and transmitting devices are used for ensuring the accuracy of infrared identification.
In order to solve the technical problems, the invention adopts the technical scheme that: the titration apparatus comprises a titration cylinder, a titration pipeline, a control system, a titration pump, a first infrared transmitter, a first infrared receiver, a second infrared transmitter, a second infrared receiver, a signal transmission cable and a target titration cylinder, wherein the titration cylinder is connected with the titration pump through the titration pipeline;
wherein: the device comprises a titration pump, a first infrared transmitter, a first infrared receiver, a second infrared receiver, a control system and a control system, wherein the first infrared transmitter and the first infrared receiver are horizontally arranged oppositely, the first infrared receiver is used for receiving a signal of the first infrared transmitter, the second infrared transmitter and the second infrared receiver are horizontally arranged oppositely, the second infrared receiver is used for receiving a signal of the second infrared transmitter, the first infrared transmitter and the first infrared receiver are positioned above the second infrared transmitter and the second infrared receiver, the control system is arranged on a pump body of the titration pump, and the control system is electrically connected with the titration pump, the first infrared transmitter, the first infrared receiver, the second infrared transmitter and the second infrared receiver through signal transmission cables.
The first pump, the second pump, the third pump, the fourth pump and the fifth pump are all peristaltic pumps, metering devices are arranged on the peristaltic pumps, and the peristaltic pumps are in the structure that: the synchronous disc comprises a driving motor, a pump head seat, a sleeve, a main shaft, a synchronous disc, bearings, a pump pipe, a pressure pipe buckle shell and an end cover, wherein a machine body of the driving motor is fixedly arranged at one end of the pump head seat, the other end of the pump head seat is provided with the sleeve, the main shaft is movably arranged in the sleeve, the axial section of the main shaft is in an I shape, one end of the main shaft is connected with a power output end of the driving motor penetrating through the pump head seat, a plurality of bearings are sleeved in an annular groove of the main shaft, the synchronous disc is of a needle bearing structure, the needle bearings are circumferentially arrayed at the minimum noninterference interval, the synchronous disc is sleeved on the bearings in the annular groove of the main shaft, the outer sides of the bearings are attached to the inner sides of the synchronous disc, the two ends of the synchronous disc are respectively and fixedly arranged at the inner sides of the two ends of the annular groove of the main shaft, so that, the end cover is fixedly arranged at the end part of the sleeve, the synchronous disc is sealed in the sleeve, a semicircular through hole is formed in the upper side of the sleeve, so that the needle roller bearing positioned on the upper side of the sleeve is exposed, and one or more pump pipes are tightly pressed on the needle roller bearing through a pressure pipe buckle shell;
one end of the pressure pipe buckling shell is hinged to the pump head seat through a buckling shell closing pin, the other end of the pressure pipe buckling shell is provided with a vertical through hole or a semicircular opening vertical groove, a switch pin bushing is arranged on the lower side of the vertical through hole or the semicircular opening vertical groove, a switch pin spring bushing is arranged on the upper side of the vertical through hole or the semicircular opening vertical groove, the switch pin spring bushing is vertically arranged, one side of the switch pin spring bushing is fixedly arranged on the pump head seat, a spring is arranged in the switch pin spring bushing, a hand-screwed screw with a cap is inserted in the spring, the hand-screwed screw penetrates through the switch pin spring bushing and the vertical through hole or the semicircular opening vertical groove and then is in threaded connection with a threaded hole on the upper side of the switch pin bushing, and the degree of the pressure pipe buckling shell pressing the pump pipe is adjusted by; the pump pipe is located telescopic both ends and all overlaps and is equipped with the tube clamping seat, the upper portion of tube clamping seat is provided with the U type groove of horizontal setting, the pump pipe stretches out from the U type groove of tube clamping seat, the outside of tube clamping seat is provided with the regulating plate, the side of regulating plate is fixed on the pump head seat, the vertical slotted hole that is provided with on the regulating plate, the tube clamping seat compresses tightly through the annular knurl hand screw that runs through regulating plate slotted hole and fixes on the sleeve, annular knurl hand screw is used for adjusting the upper and lower position of tube clamping seat.
The first pump, the second pump, the third pump, the fourth pump and the fifth pump are all diaphragm pumps, and metering devices are arranged on the diaphragm pumps.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pump and the infrared detection module are used in a matched closed loop manner, so that the volume of the titration liquid can be accurately identified, and the titration is not influenced by the aging of a pipeline; and closed-loop control is formed, and whether liquid drips or not can be identified.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic flow chart of the present invention.
Fig. 3 is a schematic view showing the structure of the peristaltic pump of the present invention.
In the figure: the device comprises a titration barrel 1, a titration pipeline 2, a control system 3, a titration pump 4, a first infrared transmitter 5, a first infrared receiver 6, a second infrared transmitter 7, a second infrared receiver 8, a signal transmission cable 9, a target titration barrel 10, a driving motor 111, a pump head seat 112, a sleeve 113, a main shaft 114, a synchronous disc 115, a bearing 116, a pump pipe 117, a pressure pipe buckle shell 118, an end cover 119, a buckle shell closing pin 1110, a vertical through hole or a semicircular opening vertical groove 1111, a switch pin spring bushing 1112, a spring 1113, a hand-screwed screw 1114, a clamping pipe seat 1115, an adjusting plate 1116 and a hand-screwed screw 1117.
Detailed Description
As shown in fig. 1, fig. 2 and fig. 3, the titration system for closed-loop infrared detection and metering of the present invention includes a titration cylinder 1, a titration pipeline 2, a control system 3, a titration pump 4, a first infrared transmitter 5, a first infrared receiver 6, a second infrared transmitter 7, a second infrared receiver 8, a signal transmission cable 9 and a target titration cylinder 10, wherein the titration cylinder 1 and the titration pump 4 are connected through the titration pipeline 2, the target titration cylinder 10 is disposed below the titration pump 4, and the first infrared transmitter 5, the first infrared receiver 6, the second infrared transmitter 7 and the second infrared receiver 8 are disposed between the titration pump 4 and the target titration cylinder 10;
wherein: the device comprises a first infrared transmitter 5, a first infrared receiver 6, a second infrared transmitter 7, a second infrared receiver 8, a control system 3 and a titration pump 4, wherein the first infrared transmitter 5 and the first infrared receiver 6 are horizontally arranged oppositely, the first infrared receiver 6 is used for receiving signals of the first infrared transmitter 5, the second infrared transmitter 7 and the second infrared receiver 8 are horizontally arranged oppositely, the second infrared receiver 8 is used for receiving signals of the second infrared transmitter 7, the first infrared transmitter 5 and the first infrared receiver 6 are positioned above the second infrared transmitter 7 and the second infrared receiver 8, the control system 3 is arranged on a pump body of the titration pump 4, and the control system 3 is electrically connected with the titration pump 4, the first infrared transmitter 5, the first infrared receiver 6, the second infrared transmitter 7 and the second infrared receiver 8 through signal transmission cables 9.
The first pump 11, the second pump 12, the third pump 13, the fourth pump 14 and the fifth pump 15 are all peristaltic pumps, a metering device is arranged on each peristaltic pump, and the peristaltic pumps are structurally characterized in that: the oil pump comprises a driving motor 111, a pump head base 112, a sleeve 113, a main shaft 114, a synchronous disc 115, bearings 116, a pump pipe 117, a pressure pipe buckle shell 118 and an end cover 119, wherein a machine body of the driving motor 111 is fixedly arranged at one end of the pump head base 112, the other end of the pump head base 112 is provided with the sleeve 113, the main shaft 114 is movably arranged in the sleeve 113, the axial section of the main shaft 114 is in an I shape, one end of the main shaft 114 is connected with a power output end of the driving motor 111 penetrating through the pump head base 112, a plurality of bearings 116 are sleeved in an annular groove of the main shaft 114, the synchronous disc 115 is of a needle bearing structure, the plurality of needle bearings are circumferentially arrayed at the smallest non-interference interval, the synchronous disc 115 is sleeved on the bearings 116 in the annular groove of the main shaft 114, the outer side of the bearings 116 is attached to the inner side of the synchronous disc 115, two ends of the synchronous disc 115, the synchronous disc 115 can synchronously rotate along with the main shaft 114, and simultaneously, the needle roller bearing of the synchronous disc 115 is supported by the bearing 116 and can rotate, the end cover 119 is fixedly arranged at the end part of the sleeve 113, the synchronous disc 115 is sealed in the sleeve 113, the upper side of the sleeve 113 is provided with a semicircular through hole, so that the needle roller bearing positioned at the upper side of the sleeve 113 is exposed, and one or more pump pipes 117 are pressed on the needle roller bearing through the pressure pipe buckle shell 118;
one end of the crimp buckle 118 is hinged to the pump head base 112 via a buckle closing pin 1110, the other end of the pressure pipe buckle shell 118 is provided with a vertical through hole or a semicircular opening vertical groove 1111, the underside of the vertical through hole or semi-circular open vertical slot 1111 is provided with a switch pin bushing 1112, the upper side of the vertical through hole or the semi-circular opening vertical groove 1111 is provided with a switch pin spring bushing 1112, the switch pin spring bushing 1112 is vertically arranged, and one side of the switch pin spring bushing 1112 is fixedly arranged on the pump head base 112, a spring 1113 is arranged in the switch pin spring bushing 1112, a hand screw 1114 with a cap is inserted in the spring 1113, the hand screw 1114 penetrates through the switch pin spring bushing 1112 and the vertical through hole or the semicircular opening vertical groove 1111 to be in threaded connection with a threaded hole at the upper side of the switch pin bushing 1112, the degree to which the pump tube 117 is pressed by the crimp housing 118 is adjusted by turning the thumb screw 1114; the pump tube 117 is located the both ends of sleeve 113 and all overlaps and is equipped with card pipe seat 1115, the upper portion of card pipe seat 1115 is provided with the U type groove of horizontal setting, pump tube 117 stretches out from the U type groove of card pipe seat 1115, the outside of card pipe seat 1115 is provided with regulating plate 1116, the side of regulating plate 1116 is fixed on pump head seat 112, the vertical slotted hole that is provided with on regulating plate 1116, card pipe seat 1115 is compressed tightly on sleeve 113 through the knurling hand screw 1117 that runs through regulating plate 1116 slotted hole, knurling hand screw 1117 is used for adjusting the upper and lower position of card pipe seat 1115.
The first pump 11, the second pump 12, the third pump 13, the fourth pump 14 and the fifth pump 15 are all diaphragm pumps, and metering devices are arranged on the diaphragm pumps.
The needle roller bearings of the synchronous disc 115 are tightly arranged, the pulsation frequency of the pump pipe 117 is reduced, the medium in the pump pipe 117 is easier to control and more accurate to control, and because the side surfaces of the needle roller bearings are not resistant, the bearings 116 are arranged in the needle roller bearings and used for supporting the needle roller bearings and reducing the damage of the needle roller bearings.
The needle bearing is fixed by the main shaft (pin), the deep groove bearing, the shaft cover, the flange and other parts, the Teflon hose, the needle bearing and the pressure pipe joint buckle shell are wriggle and rub to drive the fluid by the motor driving rotation, the needle bearing is fixed by the main shaft (pin), the deep groove bearing, the shaft cover, the flange and other parts, 1112 needle rollers are driven by the motor driving the needle bearing to rotate to drive the fluid, the pulsation is small, the flow is low, and the precision is high.
The titration barrel of the invention: the titration pump is used for pumping titration liquid from the titration barrel and titrating the titration liquid into a target titration barrel;
a titration pipeline: a conduit for the flow of liquid;
the control system comprises: the control system for pump operation and infrared sensor detection is composed of a micro-control chip and a program in one version;
a titration pump: the pump for transporting liquid is controlled by the control system, and the running speed of the pump needs to be controlled when the pump runs, so that the liquid can fall in a form of one drop and one drop as fast as possible;
infrared transmission 1 and infrared transmission 2: an infrared transmitting device;
infrared reception 1 and infrared reception 2: an infrared ray receiving device;
signal transmission line: transmitting the signal from the infrared detection module to a control system;
target titration bucket: receiving liquid titrated by a titration pump.
The system has two key points:
1. the two groups of infrared transmitting and receiving components block infrared normal receiving by penetrating through an intermediate zone for infrared transmitting and receiving when liquid drops drop, so that the dropping of the liquid drops is judged, and the control system calculates the total amount of liquid to be titrated by judging the dropping of the liquid drops; the purpose of using two groups of infrared receiving and transmitting is to prevent the liquid drop from being missed;
2. after the pump is started to operate, the pump cannot operate at a high speed, if the pump operates at the high speed, the liquid is not dropped in a drop-by-drop mode, and the infrared sensor cannot quantitatively identify how many drops of liquid are dropped.
The key innovation point of the invention is that two groups of infrared transceiving sensors are matched to form titration closed-loop control, so as to achieve the aim of accurate titration.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (3)
1. A titration system for closed-loop infrared detection metering is characterized by comprising a titration cylinder (1), a titration pipeline (2), a control system (3), a titration pump (4), a first infrared transmitter (5), a first infrared receiver (6), a second infrared transmitter (7), a second infrared receiver (8), a signal transmission cable (9) and a target titration cylinder (10), wherein the titration cylinder (1) is connected with the titration pump (4) through the titration pipeline (2), the target titration cylinder (10) is arranged below the titration pump (4), and the first infrared transmitter (5), the first infrared receiver (6), the second infrared transmitter (7) and the second infrared receiver (8) are arranged between the titration pump (4) and the target titration cylinder (10);
wherein: the first infrared transmitter (5) and the first infrared receiver (6) are horizontally arranged oppositely, the first infrared receiver (6) is used for receiving signals of the first infrared transmitter (5), the second infrared transmitter (7) and the second infrared receiver (8) are horizontally arranged oppositely, the second infrared receiver (8) is used for receiving the signal of the second infrared transmitter (7), and the first infrared transmitter (5) and the first infrared receiver (6) are located above the second infrared transmitter (7) and the second infrared receiver (8), the control system (3) is arranged on a pump body of the titration pump (4), and the control system (3) is electrically connected with the titration pump (4), the first infrared transmitter (5), the first infrared receiver (6), the second infrared transmitter (7) and the second infrared receiver (8) through signal transmission cables (9).
2. The closed-loop titration system with infrared detection and metering function according to claim 1, wherein the first pump (11), the second pump (12), the third pump (13), the fourth pump (14) and the fifth pump (15) are all peristaltic pumps, a metering device is arranged on each peristaltic pump, and the structure of each peristaltic pump is as follows: the novel oil pump comprises a driving motor (111), a pump head base (112), a sleeve (113), a main shaft (114), a synchronous disc (115), a bearing (116), a pump pipe (117), a pressure pipe buckle shell (118) and an end cover (119), wherein a machine body of the driving motor (111) is fixedly arranged at one end of the pump head base (112), the sleeve (113) is arranged at the other end of the pump head base (112), the main shaft (114) is movably arranged in the sleeve (113), the axial section of the main shaft (114) is in an I shape, one end of the main shaft (114) is connected with a power output end of the driving motor (111) penetrating through the pump head base (112), a plurality of bearings (116) are sleeved in an annular groove of the main shaft (114), the synchronous disc (115) is of a needle roller bearing structure, the plurality of needle roller bearings are circumferentially arrayed at the smallest non-interference interval, the synchronous disc (115) is sleeved on the bearing (116) in the annular groove of, the outer side of the bearing (116) is attached to the inner side of the synchronous disc (115), two ends of the synchronous disc (115) are fixedly arranged on the inner sides of two ends of an annular groove of the main shaft (114) respectively, so that the synchronous disc (115) can synchronously rotate along with the main shaft (114), needle bearings of the synchronous disc (115) are supported by the bearing (116) and can rotate, the end cover (119) is fixedly arranged at the end part of the sleeve (113), the synchronous disc (115) is sealed in the sleeve (113), a semicircular through hole is formed in the upper side of the sleeve (113), the needle bearings positioned on the upper side of the sleeve (113) are exposed, and one or more pump pipes (117) are pressed on the needle bearings through the pressing pipe buckling shell (118);
the one end of pressing pipe knot shell (118) articulates on pump head seat (112) through detaining shell shut round pin (1110), press the other end of pressing pipe knot shell (118) to be provided with vertical through-hole or semi-circular opening vertical slot (1111), the downside of vertical through-hole or semi-circular opening vertical slot (1111) is provided with switch round pin bush (1112), the upside of vertical through-hole or semi-circular opening vertical slot (1111) is provided with switch round pin spring bushing (1112), switch round pin spring bushing (1112) vertical setting, just one side of switch round pin spring bushing (1112) is fixed to be set up on pump head seat (112), be provided with spring (1113) in switch round pin spring bushing (1112), hand screw (1114) interpolation of taking the cap is equipped with hand screw (1114), hand screw (1114) run through behind switch round pin spring bushing (1112) and vertical through-hole or semi-circular opening vertical slot (1111) and the screw hole threaded connection of switch round pin bush (1112) upside, the degree of the pressing pipe buckle shell (118) pressing the pump pipe (117) is adjusted by turning a hand screw (1114); pump line (117) are located the both ends of sleeve (113) and all are equipped with cartridge (1115), the upper portion of cartridge (1115) is provided with the U type groove of horizontal setting, pump line (117) stretch out from the U type groove of cartridge (1115), the outside of cartridge (1115) is provided with regulating plate (1116), the side of regulating plate (1116) is fixed on pump head seat (112), the vertical trompil hole that is provided with on regulating plate (1116), cartridge (1115) compresses tightly through knurling hand screw (1117) that runs through regulating plate (1116) trompil hole and fixes on sleeve (113), knurling hand screw (1117) are used for adjusting the upper and lower position of cartridge (1115).
3. A closed loop ir detection metered titration system according to claim 1, wherein the first pump (11), the second pump (12), the third pump (13), the fourth pump (14) and the fifth pump (15) are all membrane pumps, and a metering device is arranged on the membrane pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407665.6A CN112412728A (en) | 2020-12-04 | 2020-12-04 | Closed-loop infrared detection metering titration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407665.6A CN112412728A (en) | 2020-12-04 | 2020-12-04 | Closed-loop infrared detection metering titration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412728A true CN112412728A (en) | 2021-02-26 |
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ID=74830242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011407665.6A Pending CN112412728A (en) | 2020-12-04 | 2020-12-04 | Closed-loop infrared detection metering titration system |
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| Country | Link |
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| CN (1) | CN112412728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529355A (en) * | 2019-09-09 | 2019-12-03 | 英华达（上海）科技有限公司 | Liquid measure control device and the liquid measure control method for applying it |
-
2020
- 2020-12-04 CN CN202011407665.6A patent/CN112412728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529355A (en) * | 2019-09-09 | 2019-12-03 | 英华达（上海）科技有限公司 | Liquid measure control device and the liquid measure control method for applying it |
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