CN116906310A - Application for detecting uncovering and stopping of peristaltic pump head - Google Patents
Application for detecting uncovering and stopping of peristaltic pump head Download PDFInfo
- Publication number
- CN116906310A CN116906310A CN202311022042.0A CN202311022042A CN116906310A CN 116906310 A CN116906310 A CN 116906310A CN 202311022042 A CN202311022042 A CN 202311022042A CN 116906310 A CN116906310 A CN 116906310A
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- China
- Prior art keywords
- pump head
- servo motor
- microcontroller
- current
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002572 peristaltic effect Effects 0.000 title claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 10
- 238000013500 data storage Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- F04B49/065—Control using electricity and making use of computers
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
Abstract
The invention discloses an application for detecting uncapping and stopping of a peristaltic pump head, which has the technical scheme that: the method comprises the following steps: the microcontroller sends PWM signals to the servo motor driving circuit, the servo motor driving circuit is connected with the servo motor to control the servo motor to operate, the servo motor rotates to drive the pump head to operate and squeeze the hose, and the position of the pump head cover is judged; when the pump head pulling rod is at the closing position A of the pump head cover, the pump head pulling rod is in a state of extruding a hose, the load is heavy at the moment, the driving motor operates and outputs large torque, the current detected on the sampling resistor R is input to the analog channel of the microcontroller through the differential amplifying circuit, and the current collected by the analog channel of the microcontroller is large at the moment and continuously sends PWM signals. The invention judges the state of the pump head cover by the magnitude of the sampling current, and influences the change of the load magnitude by the physical change of the pump head spanner rod, thereby obtaining the magnitude change of the sampling current to judge the state of the pump head cover.
Description
Technical Field
The invention relates to the field of peristaltic pumps, in particular to an application for detecting uncapping and stopping of a pump head of a peristaltic pump.
Background
Peristaltic pumps consist of three parts: a driver, a pump head and a hose. The characteristics of fluid isolation in the pump tube, quick replacement of the pump tube, reversible fluid running, dry running, low maintenance cost and the like form the main competitive advantage of the peristaltic pump, and the peristaltic pump is like a hose filled with fluid by clamping fingers, and the fluid moves forwards along with the fingers sliding forwards in the tube. Peristaltic pumps are also the principle simply by replacing the finger with a roller. Fluid is pumped by alternately squeezing and releasing the flexible delivery hose of the pump. As the hose is squeezed by two fingers, negative pressure is formed in the hose along with the movement of the fingers, and liquid flows along with the negative pressure.
In the prior art, the structure and the electrical signal processing are performed on the pump head, so that the structural complexity of the pump head is increased, the cost is increased, and meanwhile, the butt joint processing of the internal and external electrical signals of the peristaltic pump is also required.
Disclosure of Invention
In view of the problems mentioned in the background art, it is an object of the present invention to provide an application for detecting a uncapping stall of a pump head of a peristaltic pump, in order to solve the problems mentioned in the background art.
The technical aim of the invention is realized by the following technical scheme:
an application for detecting a peristaltic pump head uncap shutdown, comprising the steps of:
the microcontroller sends PWM signals to the servo motor driving circuit, the servo motor driving circuit is connected with the servo motor to control the servo motor to operate, the servo motor rotates to drive the pump head to operate and squeeze the hose, and the position of the pump head cover is judged;
when the pump head pulling rod is in a pump head cover closing position A, the pump head pulling rod is in a hose extrusion state, the load is heavy at the moment, the driving motor operates and outputs large torque, the current detected on the sampling resistor R is input to an analog channel of the microcontroller through the differential amplifying circuit, and the current collected by the analog channel of the microcontroller is large at the moment and continuously sends a PWM signal;
when the motor drives the pump head roller to operate, the pump head pulling rod is pulled from the closing position A to the opening position B, the hose is in a loosening state in the opening state of the pump head cover, the load is light at the moment, the torque output by the operation of the driving motor is reduced, the current detected on the sampling resistor R is input to the analog channel of the microcontroller through the differential amplifying circuit, the current collected by the analog channel of the microcontroller is small at the moment, so that the pump head cover is judged to be opened, PWM signals are stopped to be sent, the servo motor and the pump head roller stop operating, and the feedback signal circuit ensures that the servo motor is confirmed to stop.
Preferably, the servo motor is connected with the microcontroller through a feedback signal circuit, and two ends of the sampling resistor R are connected with a differential amplifying circuit in parallel.
Preferably, according to the characteristic that the peristaltic pump head rollers alternately extrude and release to realize liquid transmission, the time length between two times of roller extrusion at each rotating speed is calculated, and the number of points of the microcontroller for collecting current data each time is further calculated.
Preferably, the number of points of the current data collected each time has the change of the wave crest and the wave trough of primary current, and the minimum collection point number of the three rollers at different rotating speeds is=1/(Vrpm/60)/3/0.5×1000; minimum acquisition point number at different rotation speeds of four rollers=1/(Vrpm/60)/4/0.5×1000; under the condition that the pump head is not provided with a clamping tube, the collected current is not changed in wave crest and wave trough.
Preferably, the microcontroller is connected with a data storage module, the data storage module is in communication connection with a storage system, the storage system comprises a relational database, a distributed database, a column type storage and a NoSQL database, and the data storage module is connected with a data safety protection module, a data backup module and a data recovery module.
Preferably, the microcontroller is connected with an early warning system, and the early warning system comprises an alarm information sending module, an alarm display module and an audible and visual alarm module.
Preferably, the servo motor driving circuit is electrically connected with a servo motor fault detection system, and the servo motor fault detection system comprises a fault trigger detection unit, a temperature sampling unit, a current sampling unit and a fault output processing unit.
Preferably, the differential amplifying circuit is one of a double-ended input double-ended output, a double-ended input single-ended output, a single-ended input double-ended output and a single-ended input single-ended output.
In summary, the invention has the following advantages:
the invention judges the state of the pump head cover by the magnitude of the sampling current, and influences the change of the load magnitude by the physical change of the pump head spanner rod, thereby obtaining the magnitude change of the sampling current to judge the state of the pump head cover.
According to the invention, the sensor for detecting the state of the pump head is not added separately, and the sensor for detecting the state of the pump head is added when the cover of most pump heads is closed or opened, so that the closing or opening of the pump head cover can be detected without the sensor in the method, and zero cost is realized.
The circuit of the invention is easy to realize, the whole circuit is simple to realize, and the peripheral circuit components are few. Because of the design of the algorithm, a certain requirement is required for MCU program design, and the current acquisition and judgment algorithm is required to be processed.
The pump head and the motor are only mechanically connected, no electrical interface is added, and whether the motor is in a cover opening state or not is judged through the influence of the load end on the motor driving current, so that the safety in the production process is ensured.
The whole cost of the invention is the cost of the whole motor driving circuit, a sensor for detecting the state of the pump head is not increased independently, and the method is simple, and the situation that the current has larger change can be realized only in the closed and open states of the pump head cover.
The invention does not need to process the original design pump head, and only needs to process internal electric signals according to the motion characteristics of the pump head.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a diagram of the detection ripple of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, an application for detecting a peristaltic pump head open-end shutdown, comprising the steps of:
the microcontroller sends PWM signals to the servo motor driving circuit, the servo motor driving circuit is connected with the servo motor to control the servo motor to operate, the servo motor rotates to drive the pump head to operate and squeeze the hose, and the position of the pump head cover is judged;
when the pump head pulling rod is in a pump head cover closing position A, the pump head pulling rod is in a hose extrusion state, the load is heavy at the moment, the driving motor operates and outputs large torque, the current detected on the sampling resistor R is input to an analog channel of the microcontroller through the differential amplifying circuit, and the current collected by the analog channel of the microcontroller is large at the moment and continuously sends a PWM signal;
when the motor drives the pump head roller to operate, the pump head pulling rod is pulled from the closing position A to the opening position B, the hose is in a loosening state in the opening state of the pump head cover, the load is light at the moment, the torque output by the operation of the driving motor is reduced, the current detected on the sampling resistor R is input to the analog channel of the microcontroller through the differential amplifying circuit, the current collected by the analog channel of the microcontroller is small at the moment, so that the pump head cover is judged to be opened, PWM signals are stopped to be sent, the servo motor and the pump head roller stop operating, and the feedback signal circuit ensures that the servo motor is confirmed to stop.
The servo motor is connected with the microcontroller through a feedback signal circuit, and differential amplifying circuits are connected in parallel at two ends of the sampling resistor R.
According to the characteristics of realizing liquid transmission by alternately extruding and releasing the rollers of the peristaltic pump head, the time length between the extrusion of the rollers at each rotating speed is calculated, and the number of points of the microcontroller for collecting current data each time is further calculated.
The number of points of the current data collected each time has the change of the wave crest and the wave trough of primary current, and the minimum collection point number of the three rollers at different rotating speeds is=1/(Vrpm/60)/3/0.5×1000; minimum acquisition point number at different rotation speeds of four rollers=1/(Vrpm/60)/4/0.5×1000; under the condition that the pump head is not provided with a clamping tube, the collected current is not changed in wave crest and wave trough.
The microcontroller is connected with a data storage module which is in communication connection with a storage system, wherein the storage system comprises a relational database, a distributed database, a column type storage and a NoSQL database, and the data storage module is connected with a data safety protection module, a data backup module and a data recovery module.
The microcontroller is connected with an early warning system, and the early warning system comprises an alarm information sending module, an alarm display module and an audible and visual alarm module.
The servo motor driving circuit is electrically connected with a servo motor fault detection system, and the servo motor fault detection system comprises a fault trigger detection unit, a temperature sampling unit, a current sampling unit and a fault output processing unit.
The differential amplifying circuit is one of a double-end input and double-end output, a double-end input and single-end output, a single-end input and double-end output and a single-end input and single-end output.
In this embodiment, the state of the pump head cover is determined by the magnitude of the sampling current, and the change of the load magnitude is affected by the physical change of the pump head lever, so that the state of the pump head cover is determined by the magnitude change of the sampling current.
In the embodiment, the sensor for detecting the state of the pump head is not added separately, and the sensor for detecting the state of the pump head is added when the cover of most pump heads is closed and opened.
The circuit of the embodiment is easy to realize, the whole circuit is simple to realize, and the peripheral circuit components are few. Because of the design of the algorithm, a certain requirement is required for MCU program design, and the current acquisition and judgment algorithm is required to be processed.
The pump head and the motor are only connected mechanically, no electrical interface is added, and whether the motor is in a cover opening state or not is judged through the influence of the load end on the motor driving current, so that the safety in the production process is ensured.
The whole cost of the embodiment is the cost of the whole motor driving circuit, a sensor for detecting the state of the pump head is not increased independently, and the method is simple and can be realized only in the occasion that the current has larger change under the closing and opening states of the pump head cover.
In this embodiment, the pump head of the original design is not required to be processed, and only internal electrical signal processing is required to be performed according to the motion characteristics of the pump head.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An application for detecting uncapping and stopping of a peristaltic pump head, which is characterized in that: the method comprises the following steps:
the microcontroller sends PWM signals to the servo motor driving circuit, the servo motor driving circuit is connected with the servo motor to control the servo motor to operate, the servo motor rotates to drive the pump head to operate and squeeze the hose, and the position of the pump head cover is judged;
when the pump head pulling rod is in a pump head cover closing position A, the pump head pulling rod is in a hose extrusion state, the load is heavy at the moment, the driving motor operates and outputs large torque, the current detected on the sampling resistor R is input to an analog channel of the microcontroller through the differential amplifying circuit, and the current collected by the analog channel of the microcontroller is large at the moment and continuously sends a PWM signal;
when the motor drives the pump head roller to operate, the pump head pulling rod is pulled from the closing position A to the opening position B, the hose is in a loosening state in the opening state of the pump head cover, the load is light at the moment, the torque output by the operation of the driving motor is reduced, the current detected on the sampling resistor R is input to the analog channel of the microcontroller through the differential amplifying circuit, the current collected by the analog channel of the microcontroller is small at the moment, so that the pump head cover is judged to be opened, PWM signals are stopped to be sent, the servo motor and the pump head roller stop operating, and the feedback signal circuit ensures that the servo motor is confirmed to stop.
2. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: the servo motor is connected with the microcontroller through a feedback signal circuit, and differential amplifying circuits are connected in parallel at two ends of the sampling resistor R.
3. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: according to the characteristic that liquid is transmitted by alternately extruding and releasing the rollers at the pump head of the peristaltic pump, the time length between the extrusion of the rollers at each rotating speed is calculated, and the number of points of the microcontroller for collecting current data each time is further calculated.
4. A use according to claim 3 for detecting a peristaltic pump head uncap shutdown, characterized in that: the number of points of the current data collected each time has the change of the wave crest and the wave trough of primary current, and the minimum collection point number of the three rollers at different rotating speeds is=1/(Vrpm/60)/3/0.5×1000; minimum acquisition point number at different rotation speeds of four rollers=1/(Vrpm/60)/4/0.5×1000; under the condition that the pump head is not provided with a clamping tube, the collected current is not changed in wave crest and wave trough.
5. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: the microcontroller is connected with a data storage module which is in communication connection with a storage system, the storage system comprises a relational database, a distributed database, a column type storage and a NoSQL database, and the data storage module is connected with a data security protection module, a data backup module and a data recovery module.
6. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: the microcontroller is connected with an early warning system, and the early warning system comprises an alarm information sending module, an alarm display module and an audible and visual alarm module.
7. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: the servo motor driving circuit is electrically connected with a servo motor fault detection system, and the servo motor fault detection system comprises a fault trigger detection unit, a temperature sampling unit, a current sampling unit and a fault output processing unit.
8. The use of claim 1 for detecting a peristaltic pump head open shutdown, wherein: the differential amplifying circuit is one of a double-end input double-end output, a double-end input single-end output, a single-end input double-end output and a single-end input single-end output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311022042.0A CN116906310B (en) | 2023-08-15 | 2023-08-15 | Application for detecting uncovering and stopping of peristaltic pump head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311022042.0A CN116906310B (en) | 2023-08-15 | 2023-08-15 | Application for detecting uncovering and stopping of peristaltic pump head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116906310A true CN116906310A (en) | 2023-10-20 |
| CN116906310B CN116906310B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311022042.0A Active CN116906310B (en) | 2023-08-15 | 2023-08-15 | Application for detecting uncovering and stopping of peristaltic pump head |
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| Country | Link |
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| CN (1) | CN116906310B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2069063A (en) * | 1980-02-04 | 1981-08-19 | Lenton D F | Improvements in peristaltic pumps |
| US20050074337A1 (en) * | 2003-10-06 | 2005-04-07 | Anderson Thomas D. | Current monitoring system and method for metering peristaltic pump |
| CN105007006A (en) * | 2015-08-14 | 2015-10-28 | 杜铁军 | Peristaltic pump system with performance being improved and service life being prolonged and application in blood component separation |
| CN205225634U (en) * | 2015-12-10 | 2016-05-11 | 威海威高血液净化制品有限公司 | Peristaltic pump pump box |
| CN213016728U (en) * | 2020-09-04 | 2021-04-20 | 保定创锐泵业有限公司 | Spring safety pump head |
| CN218624595U (en) * | 2022-09-30 | 2023-03-14 | 保定兰格恒流泵有限公司 | Device for simultaneously realizing pump head identification and cover opening shutdown by utilizing magnetic sensor |
| CN218717393U (en) * | 2022-09-30 | 2023-03-24 | 保定兰格恒流泵有限公司 | Peristaltic pump of safe shut down |
-
2023
- 2023-08-15 CN CN202311022042.0A patent/CN116906310B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2069063A (en) * | 1980-02-04 | 1981-08-19 | Lenton D F | Improvements in peristaltic pumps |
| US20050074337A1 (en) * | 2003-10-06 | 2005-04-07 | Anderson Thomas D. | Current monitoring system and method for metering peristaltic pump |
| CN105007006A (en) * | 2015-08-14 | 2015-10-28 | 杜铁军 | Peristaltic pump system with performance being improved and service life being prolonged and application in blood component separation |
| CN205225634U (en) * | 2015-12-10 | 2016-05-11 | 威海威高血液净化制品有限公司 | Peristaltic pump pump box |
| CN213016728U (en) * | 2020-09-04 | 2021-04-20 | 保定创锐泵业有限公司 | Spring safety pump head |
| CN218624595U (en) * | 2022-09-30 | 2023-03-14 | 保定兰格恒流泵有限公司 | Device for simultaneously realizing pump head identification and cover opening shutdown by utilizing magnetic sensor |
| CN218717393U (en) * | 2022-09-30 | 2023-03-24 | 保定兰格恒流泵有限公司 | Peristaltic pump of safe shut down |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116906310B (en) | 2024-01-30 |
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