CN110608791A - Accurate powder weighing method - Google Patents
Accurate powder weighing method Download PDFInfo
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- CN110608791A CN110608791A CN201910868078.8A CN201910868078A CN110608791A CN 110608791 A CN110608791 A CN 110608791A CN 201910868078 A CN201910868078 A CN 201910868078A CN 110608791 A CN110608791 A CN 110608791A
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- powder
- weight
- analog signal
- servo motor
- weighing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
- G01G17/06—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes having means for controlling the supply or discharge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
The invention provides a method for accurately weighing powder, which comprises the following steps: detecting the weight of the powder in the weighing hopper and obtaining a preliminary signal of the weight of the powder; converting the preliminary powder weight signal into a powder weight analog signal; and monitoring the powder weight analog signal, and controlling a servo motor through a servo driver when the powder weight analog signal meets a preset condition so that the servo motor drives a mechanical device to add powder into the weighing hopper.
Description
Technical Field
The invention belongs to the technical field of control systems, and particularly relates to a method for accurately weighing powder.
Background
The automation and integration of the production of the automobile friction plate are important development directions in the field of friction plate production, and the automatic production and integration device not only can improve the labor productivity and the equipment utilization rate, improve the quality of the friction plate and reduce the cost, but also is an important way for reducing the labor intensity and improving the labor conditions.
The automatic production line for the oil pressure of the friction plate mainly comprises a weighing system, a service trolley, a cleaning trolley, a truss, a steel backing warehouse, a finished product warehouse, a press and the like. The weighing system is an important part for ensuring the production quality of the friction plate and is a link for occupying service time in the current service system. The existing weighing system is difficult to improve the technical indexes such as powder weighing precision, speed and the like, the overshoot generated by the falling of the powder increases the failure rate of weighing in the weighing process, and the production requirements of high precision and high speed are difficult to guarantee.
After the mechanical structure of the precise powder weighing device is optimized, a control system matched with the precise powder weighing device is urgently needed.
Disclosure of Invention
The purpose of the invention is as follows: the precise powder weighing method has the functions of initialization, calibration, manual operation, automatic operation, fault processing, data recording and displaying and the like, can meet the functional requirement of precise powder weighing, and solves the problems in the background technology.
The technical scheme of the invention is as follows: in order to achieve the above object, the present invention provides a method for accurately weighing powder, comprising:
detecting the weight of the powder in the weighing hopper and obtaining a preliminary signal of the weight of the powder;
converting the preliminary powder weight signal into a powder weight analog signal;
and monitoring the powder weight analog signal, and controlling a servo motor through a servo driver when the powder weight analog signal meets a preset condition so that the servo motor drives a mechanical device to add powder into the weighing hopper.
Optionally, the controlling the servo motor by the servo driver specifically includes:
and the start-stop, the rotating speed and the rotating angle of the servo motor are controlled through the servo driver.
Optionally, the method further includes: and detecting the state of the servo motor through a servo driver.
Optionally, the state detection includes a servo motor state, a material circulation state, and an emergency stop button state.
Optionally, after monitoring the analog signal of the powder weight, the method further includes:
the weight of the powder and the corresponding time are recorded each time.
Optionally, after recording the weight of each powder and the corresponding time, the method further comprises:
and displaying the weight of the powder material and the corresponding time each time.
Optionally, the detecting the weight of the powder in the weighing hopper and obtaining a preliminary signal of the weight of the powder specifically include:
and detecting the weight of the powder in the weighing hopper by using a weighing sensor and obtaining a preliminary signal of the weight of the powder.
Optionally, the converting the preliminary powder weight signal into a powder weight analog signal specifically includes:
and converting the preliminary powder weight signal into a powder weight analog signal by using a weighing transmitter.
Optionally, the powder weight analog signal is monitored, and when the powder weight analog signal meets a preset condition, the servo motor is controlled through the servo driver, and the method specifically includes the following steps:
and monitoring the powder weight analog signal by using a PLC (programmable logic controller), and controlling the servo motor by using a servo driver when the powder weight analog signal meets a preset condition.
The invention has the beneficial effects that: the device is suitable for the occasions of quick blanking and accurate weighing of various powder materials under the action of the control system. The production efficiency is improved, the production cost is reduced, and the harm of dust to the body of an operator is reduced.
Drawings
FIG. 1 is a schematic diagram of a control system of a precise powder weighing device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for accurately weighing powder according to an embodiment of the present invention.
In the figure: the system comprises a software system 1, a hardware system 2, a human-machine operation interface 3, a PLC controller 4, a servo driver 5, a servo motor 6, a weighing transmitter 7, a weighing sensor 8 and an electrical element 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described in the lock are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Example 1
The invention provides a control system of a precise powder weighing device shown in figures 1-2, which comprises a software system 1 and a hardware system 2, wherein the software system comprises a man-machine operation interface 3, the hardware system comprises a PLC (programmable logic controller) 4, the PLC 4 is connected with a servo driver 5, a weighing transmitter 7 and an electric element 9, the servo driver 5 is connected with a servo motor 6, and the weighing transmitter 7 is connected with a weighing sensor 8. After the power-on initialization of the PLC 4 is completed, whether a calibration subprogram is entered or not is selected through the human-computer operation interface 3, if the calibration subprogram is selected to be executed, if the current mode is judged to be a manual operation mode or an automatic operation mode, if the current mode is not selected to be the manual operation mode, the manual operation subprogram is started, if the current mode is the automatic operation mode, the automatic operation subprogram is started, after each scanning period of the manual operation subprogram or the automatic operation subprogram is finished, fault judgment is carried out, if a fault exists, a fault processing subprogram is entered, and if no fault exists, the operation mode is skipped to the operation mode judgment part for circular execution;
the servo driver 5 is used for driving, monitoring and protecting the servo motor 6;
the weighing transmitter 7 is used for converting the signal of the weighing sensor 7 and performing signal interaction with the PLC 4;
the electric element 9 comprises a motor, a contactor, a proximity switch and the like;
the calibration subprogram is used for determining a linear coefficient between the weighing sensor 7 and the PLC 4;
the manual operation subprogram is used for operation and adjustment during installation and debugging, equipment maintenance and overhaul;
the automatic operation subprogram is used for a series of automatic actions of providing powder with set weight for the friction plate oil pressure automatic service system in daily operation of the device.
The fault detection is used for detecting whether the states of the servo motor, the material circulation and the emergency stop button are normal or not;
the fault processing subprogram is used for guiding an operator to carry out fault positioning and processing on the fault;
the recording function is used for recording and displaying single and accumulated related time and weight parameters in the weighing process in a human-computer interface;
from example 1 above, it can be seen that: the control system provided by the invention has the advantages of initialization function, calibration function, manual function, automatic function, fault processing function and data recording function, is comprehensive in function, simple to operate and reliable in operation, can meet the operation requirement of the powder precise weighing device during production and construction, can well meet the problems in the background technology, obviously improves the precision of powder precise weighing, shortens the weighing time and reduces the calibration workload.
The core innovation point is as follows:
the control system segments the weight to be measured according to an empirical formula, and each segment corresponds to a different rotating speed regulating mechanism;
the control system adopts double-servo constant high-speed blanking under the condition that the deviation of the real-time weight and the weight to be measured is large, adopts double-servo constant medium-speed blanking under the condition that the deviation is large, adopts PID (proportion integration differentiation) speed regulation and single-servo low-speed blanking under the condition that the deviation is small, and adopts PID speed regulation with a low limit and single-servo low-speed blanking under the condition that the deviation is small.
The man-machine operation interface of the control system has the functions of real-time recording and historical recording of the weighing rotating speed and the weight, and can automatically count related parameters such as single and average weighing time, total times, failure rate and the like.
The control system has a fault diagnosis function, and in the servo rotary blanking process, the weight is not increased or slowly increased, the control system enters an abnormal state, sends a prompt alarm signal and needs manual recovery after manual troubleshooting.
Finally, the description is as follows: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalent substitutions and modifications may be made to some features of the embodiments described above, and any modifications, equivalents, improvements and the like within the spirit and principle of the present invention are within the scope of the present invention.
Claims (9)
1. A method for accurately weighing powder is characterized by comprising the following steps:
detecting the weight of the powder in the weighing hopper and obtaining a preliminary signal of the weight of the powder;
converting the preliminary powder weight signal into a powder weight analog signal;
and monitoring the powder weight analog signal, and controlling a servo motor through a servo driver when the powder weight analog signal meets a preset condition so that the servo motor drives a mechanical device to add powder into the weighing hopper.
2. The method according to claim 1, wherein the controlling the servo motor by the servo driver comprises:
and the start-stop, the rotating speed and the rotating angle of the servo motor are controlled through the servo driver.
3. The method of claim 1, further comprising: and detecting the state of the servo motor through a servo driver.
4. The method of claim 3, wherein the state detection includes a servo motor state, a material flow state, and a scram button state.
5. The method of claim 1, wherein after monitoring the meal weight analog signal, the method further comprises:
the weight of the powder and the corresponding time are recorded each time.
6. The method of claim 5, wherein after recording each powder weight and corresponding time, the method further comprises:
and displaying the weight of the powder material and the corresponding time each time.
7. The method of claim 1, wherein said detecting the weight of powder in the weighing hopper and obtaining a preliminary signal of the weight of the powder comprises:
and detecting the weight of the powder in the weighing hopper by using a weighing sensor and obtaining a preliminary signal of the weight of the powder.
8. The method according to claim 1, wherein said converting said preliminary signal of powder weight into an analog signal of powder weight comprises:
and converting the preliminary powder weight signal into a powder weight analog signal by using a weighing transmitter.
9. The method according to claim 1, wherein the monitoring of the powder weight analog signal, and the controlling of the servo motor by the servo driver when the powder weight analog signal satisfies a preset condition, specifically comprises:
and monitoring the powder weight analog signal by using a PLC (programmable logic controller), and controlling the servo motor by using a servo driver when the powder weight analog signal meets a preset condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868078.8A CN110608791A (en) | 2019-09-09 | 2019-09-09 | Accurate powder weighing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868078.8A CN110608791A (en) | 2019-09-09 | 2019-09-09 | Accurate powder weighing method |
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| CN110608791A true CN110608791A (en) | 2019-12-24 |
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| CN201910868078.8A Pending CN110608791A (en) | 2019-09-09 | 2019-09-09 | Accurate powder weighing method |
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Citations (8)
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| CN205855436U (en) * | 2016-07-22 | 2017-01-04 | 西安益翔航电科技有限公司 | The Full-automatic blanking of a kind of powder the mechanism being precisely weighed |
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2019
- 2019-09-09 CN CN201910868078.8A patent/CN110608791A/en active Pending
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| CN208394384U (en) * | 2018-04-26 | 2019-01-18 | 厦门钜瓷科技有限公司 | A kind of discharge mechanism for automated machine equipment |
| CN208458859U (en) * | 2018-07-05 | 2019-02-01 | 冯学和 | A kind of large tile automatic balance material machine |
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Application publication date: 20191224 |