CN112763746A - Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller - Google Patents
Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller Download PDFInfo
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- CN112763746A CN112763746A CN202110047958.6A CN202110047958A CN112763746A CN 112763746 A CN112763746 A CN 112763746A CN 202110047958 A CN202110047958 A CN 202110047958A CN 112763746 A CN112763746 A CN 112763746A
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- proximity switch
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- coded disc
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- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000006698 induction Effects 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 5
- 239000000571 coke Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
- G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to the field of measuring the angular speed of an output rotating shaft of an object to be measured. A method for realizing multifunctional speed measurement of a rotating mechanism based on a logic controller is characterized in that a coded disc is prepared according to the diameter of an output rotating shaft of an object to be measured; a proximity switch is arranged on an object to be detected, a transmitting head and a receiving head of the proximity switch are aligned to a through hole circle of the code disc, and the proximity switch is connected with the PLC; the PLC receives signals of the proximity switch to form pulses, the total pulse number A is obtained in a time period T, the angular speed omega =2 pi A/(T N) of the output rotating shaft of the object to be detected, N is the number of through holes, and pi is the circumferential rate. The problems that the traditional integrated pulse speed measuring device is used in a complex industrial field environment are solved.
Description
Technical Field
The invention relates to the field of measuring the angular speed of an output rotating shaft of an object to be measured.
Background
The coal moisture control systems 1 and 2 currently used in the tai-gang coke plant are put into production respectively in 8 months in 2006 and 10 months in 2013, the coal moisture control system of the tai-gang coke plant is an important pivotal system for regulating the coal moisture transmitted from a plant coal preparation system to a coke oven coal tower, the moisture content of the coal transmitted to the coal tower directly determines the quality of a final product coke, the most critical large-scale equipment in the coal moisture control system is a drier unit, the operating state of the drier unit directly determines the stability of a subsequent production state and the quality of the product, one of important bases for monitoring whether the working operating state is normal or not is the operating speed of the drier unit, and the problem in actual operation is that 1) the service life of the integrated pulse velocity measurement device is not long generally in a particularly complex industrial environment such as a coal preparation drying unit area (high temperature, diffuse conductive and the like), the anti-interference performance is poor, the signal cable is laid for a long time, the failure rate is high, the requirements on some production rhythms are high, the requirements cannot be met by a rotary actuating mechanism for monitoring a key explosion-proof area at all, and the actual production requirements can be met only by reasonably storing enough spare parts. 2) The integrated pulse speed measuring device is often fixed and single in installation mode, the speed measuring principle scheme and the output precision, the speed display mode is basically fixed and nonadjustable once the device is shaped, the device is also not easy to install for a rotary actuating mechanism which runs in a narrow hidden area of an actual production field, in addition, the signal interaction can be completed only by a special signal conversion adapter when the device signal transmission and the field PLC control system form a closed-loop control system, so that additional signal cables and power supplies are needed, the number of invisible fault points is increased, time and labor are wasted in daily point inspection and replacement and fixed inspection, and the integrated pulse speed measuring device is not beneficial to practical application.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: through the innovative thinking of combining simple mechanical structure to replace special pulse speed measuring device equipment based on implanting novel multi-functional pulse speed measuring program algorithm in the on-the-spot PLC controller, when guaranteeing that the functional accuracy satisfies the needs of actual production, can reduce hardware sensing equipment's purchasing cost again, a large amount of manpower and materials that daily maintenance overhauld and change the input have also been avoided, equipment failure rate obviously reduces to improve equipment steady operation rate, fundamentally avoided taking place major equipment accident.
The technical problem to be solved by the invention is as follows: a method for realizing multifunctional speed measurement of a rotating mechanism based on a logic controller comprises the following steps
Firstly, preparing a coded disc according to the diameter of an output rotating shaft of an object to be detected, wherein the coded disc is a metal disc, the coded disc is sleeved on the output rotating shaft through a central round hole of the coded disc, a plurality of through holes are formed in the outer side of the central round hole of the coded disc, and each through hole is arranged on the circumference of a circle which takes the center of the coded disc as the center of the circle, namely a through hole circle at equal intervals;
secondly, mounting a proximity switch on the object to be detected, aligning a transmitting head and a receiving head of the proximity switch with a through hole circle of the coded disc, and connecting the proximity switch with the PLC;
and step three, the PLC receives signals of the proximity switch to form pulses, the total pulse number A is obtained in a time period T, the angular speed omega =2 pi A/(T N) of the output rotating shaft of the object to be detected, N is the number of through holes, and pi is the circumferential rate.
The diameter of the output rotating shaft of the object to be detected is D1, the radius of the code disc is D, the radius of the through hole is D2= D/5, the diameter of the through hole circle is D/2, D1 is smaller than D/2-D/5, and N = 4.
The proximity switch is an ohm dragon sensing proximity switch with the model number of E2E-X8MD 1-Z.
The invention has the beneficial effects that: the method is applied to the coal humidifying unit mechanisms 1# and 2# of the Tai-steel coking plant at present, the application effect is good, the speed monitoring and alarming functions of the coal humidifying dryer are realized through research and development design, the expected effect is achieved, and no fault occurs within 12 months from design to implementation and modification. The stable and smooth safe production of the coal preparation production system and each process is greatly ensured, the stability of the safe operation of the coal moisture control system is improved, the occurrence of potential major production and safety accidents is eliminated, and the intrinsic safety level of equipment is improved more importantly. On the other hand, various defects existing in a complex industrial field environment by using a traditional integrated pulse velocity measurement device are overcome, another high-reliability low-cost PLC-based multifunctional pulse velocity measurement scheme is provided, reference is provided for application of similar projects in the same row, reference is provided for low-cost velocity measurement by using the method in similar industries in the country and other areas of the coking plant at present, and the potential value to be created is higher according to estimation.
Direct economic value created each year after implementation: the cost of each set of industrial application integrated pulse speed measuring device is about 1000 yuan, the cost of each ohm dragon proximity inductive switch sensor is 90 yuan, the conversion is carried out according to the average consumption of about 15 sensors every year, and the cost is saved by 15 x (1000-90) =1.37 ten thousand yuan.
Detailed Description
Design idea
1. The size of an actual rotating device is customized by the size of a simple circular coded disc, the pulse sequence density of the disc is customized according to the precision, the simple circular coded disc is installed on a shaft head of a large rotating mechanism, and a totally-enclosed proximity switch sensor of an ohm dragon is matched with an induction disc to input a fixed induction pulse signal sequence in each period into a PLC control system.
2. According to the pulse method speed measurement theory, a pulse speed measurement program and an alarm prompting program are designed, and speed monitoring and abnormal alarm of the dryer are achieved.
3. According to the pulse method speed measurement theoretical algorithm, a functional program module is designed, the function block program has a speed refreshing period adjusting function, a function of self-defining the size of a speed measurement code disc, a period pulse induction point adjusting function and a double-speed output function, all the functions are externally arranged in an interface mode, actual project developers can adjust and use the functions flexibly according to actual existing conditions, and the expandability of the program functional block is improved.
The specific operation is as follows
The pulse induction disc with the diameter D is manufactured according to actual requirements, the center of the disc is used as the center, 4 round holes with the diameter D/10 are uniformly chiseled on the circle with the radius D/4 on the disc, and therefore the manufacturing of the pulse induction disc is completed (the size of the disc and the round holes which are uniformly distributed on the disc can be manufactured according to actual requirements, the size of the disc and the size of the round holes and the number of the round holes can be adjusted, the disc with the diameter D =120mm is manufactured on the Tai-Gai steel, the center of the disc is used as the center, 4 round holes with the diameter D/10=12mm are uniformly chiseled on the circle with the radius D/4=30mm on the disc, and therefore the manufacturing of the fixed pulse induction disc is completed).
The manufactured sensing disc is arranged on a rotating shaft head of the rotating mechanism in a direction perpendicular to the rotating shaft, and meanwhile, a sensing proximity switch with the diameter of D/10 is arranged at a position 8mm right ahead of the pulse sensing disc and perpendicular to the disc to serve as a pulse sensing sensor, so that 4 pulse signals can be output in each rotation (the manufactured sensing disc is arranged on a shaft head of the rotating mechanism of the drying machine for pulse signal acquisition, and an ohm dragon sensing proximity switch with the model of E2E-X8MD1-Z serves as a sensor for pulse signal acquisition).
The signal wire of the induction proximity switch is connected to a designated digital input DI channel of a logic controller (most logic controllers on the market can be realized) through a shielded cable, the total pulse number A is obtained through a fixed time period T, the angular speed omega =2 pi A/(T N), N is the number of through holes, and pi is the circumference ratio, and the speed output monitoring can be realized through programming by utilizing the conventional logic control system (the Siemens PLC400 is used as a logic controller here, and the realization of a speed measurement algorithm is completed by adopting step7 software matched with the PLC400 system).
The speed measurement algorithm is subjected to modularized program packaging, an interface universal module aiming at different code disc sizes, different pulse induction circular hole numbers and two speed outputs (angular speed and linear speed) is manufactured, and the mechanical device which is directly transplanted to different logic controllers, different code disc sizes and different pulse induction circular hole numbers is convenient to use.
Claims (3)
1. A method for realizing multifunctional speed measurement of a rotating mechanism based on a logic controller is characterized by comprising the following steps: the method comprises the following steps
Firstly, preparing a coded disc according to the diameter of an output rotating shaft of an object to be detected, wherein the coded disc is a metal disc, the coded disc is sleeved on the output rotating shaft through a central round hole of the coded disc, a plurality of through holes are formed in the outer side of the central round hole of the coded disc, and each through hole is arranged on the circumference of a circle which takes the center of the coded disc as the center of the circle, namely a through hole circle at equal intervals;
secondly, mounting a proximity switch on the object to be detected, aligning a transmitting head and a receiving head of the proximity switch with a through hole circle of the coded disc, and connecting the proximity switch with the PLC;
and step three, the PLC receives signals of the proximity switch to form pulses, the total pulse number A is obtained in a time period T, the angular speed omega =2 pi A/(T N) of the output rotating shaft of the object to be detected, N is the number of through holes, and pi is the circumferential rate.
2. The method for realizing multifunctional speed measurement of the rotating mechanism based on the logic controller as claimed in claim 1, wherein: the diameter of the output rotating shaft of the object to be detected is D1, the radius of the code disc is D, the radius of the through hole is D2= D/5, the diameter of the through hole circle is D/2, D1 is smaller than D/2-D/5, and N = 4.
3. The method for realizing multifunctional speed measurement of the rotating mechanism based on the logic controller as claimed in claim 1, wherein: the proximity switch is an ohm dragon sensing proximity switch with the model number of E2E-X8MD 1-Z.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110047958.6A CN112763746A (en) | 2021-01-14 | 2021-01-14 | Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110047958.6A CN112763746A (en) | 2021-01-14 | 2021-01-14 | Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller |
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| CN112763746A true CN112763746A (en) | 2021-05-07 |
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| CN202110047958.6A Pending CN112763746A (en) | 2021-01-14 | 2021-01-14 | Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483318A (en) * | 2016-12-17 | 2017-03-08 | 中国重型机械研究院股份公司 | A kind of proximity switch tachymeter |
| CN209086268U (en) * | 2018-10-22 | 2019-07-09 | 南京迦南比逊科技有限公司 | A kind of dry granulating machine revolving speed on-Line Monitor Device |
| CN111024976A (en) * | 2019-12-24 | 2020-04-17 | 新疆金风科技股份有限公司 | Measuring method and measuring device for rotary power generation equipment and impeller measuring system |
-
2021
- 2021-01-14 CN CN202110047958.6A patent/CN112763746A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483318A (en) * | 2016-12-17 | 2017-03-08 | 中国重型机械研究院股份公司 | A kind of proximity switch tachymeter |
| CN209086268U (en) * | 2018-10-22 | 2019-07-09 | 南京迦南比逊科技有限公司 | A kind of dry granulating machine revolving speed on-Line Monitor Device |
| CN111024976A (en) * | 2019-12-24 | 2020-04-17 | 新疆金风科技股份有限公司 | Measuring method and measuring device for rotary power generation equipment and impeller measuring system |
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Application publication date: 20210507 |
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