CN108856307A - A kind of mechanical equipment position detecting device and detection method - Google Patents
A kind of mechanical equipment position detecting device and detection method Download PDFInfo
- Publication number
- CN108856307A CN108856307A CN201810501470.4A CN201810501470A CN108856307A CN 108856307 A CN108856307 A CN 108856307A CN 201810501470 A CN201810501470 A CN 201810501470A CN 108856307 A CN108856307 A CN 108856307A
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- Prior art keywords
- controller
- mechanical equipment
- pulse
- encoder
- pulse signal
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Abstract
The present invention relates to mechanical equipment automatic control technology field, specially a kind of mechanical equipment position detecting device and detection method, it can be achieved that device end component accurate positioning.A kind of mechanical equipment position detecting device, including motor, encoder, controller, pulse signal distribution device and transmission system, the motor, encoder, pulse signal distribution device and controller are sequentially connected, and encoder is also connected with transmission system.A kind of mechanical equipment method for detecting position, incremental encoder signal are adopted into after frequency converter, and velocity close-loop control may be implemented after the another way acquisition of signal enters PLC control system by corresponding parameter setting and obtain the position signal of equipment by handling accordingly.
Description
Technical field
The present invention relates to mechanical equipment automatic control technology field, specially a kind of mechanical equipment position detecting device and inspection
Survey method.
Background technique
In industrial sites such as steel rolling of today, papermaking, numerous mechanical equipments be all driven by drive apparatus, and
And the requirement of control is higher and higher, faster, precision is higher for control speed.Many equipment had both needed accurately to test the speed, and guaranteed that equipment is flat
Steady movement, while accurate position control is also needed, to guarantee product quality.Such as on the roughing mill of fashioned iron rolling line, roll pressure
Lower equipment avoids biggish impact with several tons of heavy rolls in order to guarantee that equipment is smoothly run, it is necessary to more accurate speed
Degree control, simultaneously because technique requires, the thickness requirement of steel rolling is higher, and the positioning requirements of roller equipment control the precision in 2mm
In range.
Summary of the invention
The present invention a kind of mechanical equipment position detecting device and detection method are provided, it can be achieved that device end component it is accurate
Positioning.
The technical solution adopted by the present invention is：
A kind of mechanical equipment position detecting device, including motor, encoder, controller, pulse signal distribution device and transmission
System, the motor, encoder, pulse signal distribution device and controller are sequentially connected, and encoder is also connected with transmission system.Using
One is installed on the incremental encoder at press down motor rear portion, detection device action pulse, and detection signal passes through signal distributor,
One signal is assigned as two signals, is respectively transmitted to the frequency converter and controller of transmission system, transmission system is used for equipment
Speed closed loop and control, controller a series of processing is carried out to pulse signal, the position of mechanical equipment is finally obtained, is used for
The position-force control of equipment.
Preferably, pulse counter is set between the pulse signal distribution device and controller, and counter is for acquiring arteries and veins
Rush number.
Preferably, the controller is PLC controller.
A kind of mechanical equipment method for detecting position, includes the following steps：
A., encoder is set on motor, and the rotation of motor generates pulse signal by encoder, and pulse signal is sent to
Pulse signal distribution device；
B. pulse signal distribution device will reach controller by signal all the way, and controller passes through the pulse value in twice sweep period
Difference calculates motor turnning circle, determines device location by enclosing number；
C. pulse signal distribution device will reach transmission system by signal all the way, and transmission system collects motor speed；
D. motor speed is adjusted by device location.
Preferably, controller sets a limit value to the difference of pulse value in the step b, when the value of pulse difference is more than limit value
Automatic clear.During device action, under normal circumstances, one scan period of program, umber of pulse does not exceed limit value, when out
When being now more than limit value, encoder be likely to occur failure or just past incremental encoder maximum value to 0 worth trip point,
This can be felt that abnormal numerical value is lost, and not adds up by this trip point sequential operation every time, if equipment repeatedly passes through
This trip point is crossed, will form a biggish error amount.It can be reset by error after confirmation, to repair this error.
Preferably, pulse signal reaches controller after pulse counter counts in the step b.
The advantageous effect of present invention is that：
1. the signal that the encoder of motor generates is reached transmission system and controller respectively by signal distributor, respectively
Device location and motor speed are calculated, motor speed is adjusted by the variation of device location, realizes close loop maneuver, essence
Du Genggao；
2. serious forgiveness is high, when signal acquisition breaks down, it can be zeroed out operation, prevent the accumulative influence of error to setting
Standby detection.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is detection method schematic diagram；
In figure：1- motor, 2- encoder, 3- controller, 4- pulse signal distribution device, 5- pulse counter, 6- power train
System.
Specific embodiment
With reference to the accompanying drawings and examples, a specific embodiment of the invention is described in further detail.
As shown in Figure 1, a kind of mechanical equipment position detecting device, including motor 1, encoder 2, controller 3, pulse signal
Distributor 4 and transmission system 6, motor 1, encoder 2, pulse signal distribution device 4 and controller 3 are sequentially connected, and encoder 2 also connects
Connect transmission system 6.Pulse counter 5 is set between pulse signal distribution device 4 and controller 3, and controller 3 is PLC controller.
Pulse signal distribution device 4 divides a signal into two-way in the present invention, wherein entering the frequency conversion of transmission system 6 all the way
Device, another way, into PLC control system, by dedicated in Siemens's special module FM350 pulse counter 5 and STEP7
Functional block CNT_CTL1, PLC control system obtain corresponding umber of pulse, and then the present invention is in PLC controller side, independent development phase
The software module answered, to calculate the exact position of equipment.
The present invention is to carry out signal acquisition using Siemens's S7-300 series of PLC, in Siemens STEP7 platform programmed environment
Under write program, develop equipment localization function module, which strictly observes modular on designing and developing, tool
There is good portable and versatility.Due to algorithm consummation, control is stablized, and considerable benefit has been seen, not only can be straight
It scoops out in the control system for Siemens, and is modified slightly in the control system that can be applied to other brands.
As shown in Fig. 2, a kind of mechanical equipment method for detecting position, includes the following steps：
A., encoder is set on motor, and the rotation of motor generates pulse signal by encoder, and pulse signal is sent to
Pulse signal distribution device；
B. pulse signal distribution device will reach controller by pulse counter by signal all the way, and controller passes through twice sweep
The difference of the pulse value in period calculates motor turnning circle, determines device location by enclosing number；Controller sets the difference of pulse value
One limit value, the automatic clear when value of pulse difference is more than limit value；
C. pulse signal distribution device will reach transmission system by signal all the way, and transmission system collects motor speed；
D. motor speed is adjusted by device location.
During device action, under normal circumstances, one scan period of program, umber of pulse does not exceed limit value, when out
When being now more than limit value, encoder be likely to occur failure or just past incremental encoder maximum value to 0 worth trip point,
This can be felt that abnormal numerical value is lost, and not adds up by this trip point sequential operation every time, if equipment repeatedly passes through
This trip point is crossed, will form a biggish error amount.It can be reset by error after confirmation, to repair this error.It is public
Formula is as follows：
PIt resets=PIt resets-(POS-POSIt is quasi-)/amount of feeding * encloses number
In the lower scan cycle of program, numerical value can be modified to exact value.
By taking shape rolling mill screwdown gear as an example, motor driven lead screw drives roll movement, and the course of work of the present invention is as follows：
After equipment starting, controller detects umber of pulse collected by pulse technique device, passes through the pulse of this scan period
Number PCurrentlyWith the umber of pulse P of upper scan cycleThe upper periodObtain increased umber of pulse PIncrease, detect PIncreaseWhether the limit value of setting is greater than,
When the limit is exceeded, failure is zeroed out, abandons this time counting, increased umber of pulse PIncreaseWith recorded accumulated pulse
Number PIt is accumulativeAddition obtains new accumulated pulse number PIt is accumulative, device location calculates the movement total feed of lead screw by accumulated pulse number
Amount.Figure centre circle number is the umber of pulse that each circle of encoder generates, and the amount of feeding is the amount of feeding of lead screw when motor rotates one week.
Claims (6)
1. a kind of mechanical equipment position detecting device, it is characterised in that：Including motor, encoder, controller, pulse signal distribution
Device and transmission system, the motor, encoder, pulse signal distribution device and controller are sequentially connected, and encoder is also connected with transmission
System.
2. a kind of mechanical equipment position detecting device according to claim 1, it is characterised in that：The pulse signal distribution
Pulse counter is set between device and controller.
3. a kind of mechanical equipment position detecting device according to claim 1, it is characterised in that：The controller is PLC
Controller.
4. a kind of mechanical equipment method for detecting position, it is characterised in that：Include the following steps：
A., encoder is set on motor, and the rotation of motor generates pulse signal by encoder, and pulse signal is sent to pulse
Signal distributor；
B. pulse signal distribution device will reach controller, the difference meter that controller passes through the pulse value in twice sweep period by signal all the way
Motor turnning circle is calculated, determines device location by enclosing number；
C. pulse signal distribution device will reach transmission system by signal all the way, and transmission system collects motor speed；
D. motor speed is adjusted by device location.
5. mechanical equipment method for detecting position according to claim 4, it is characterised in that：Controller pair in the step b
Difference one limit value of setting of pulse value, the automatic clear when value of pulse difference is more than limit value.
6. mechanical equipment method for detecting position according to claim 4, it is characterised in that：Pulse signal in the step b
Controller is reached after pulse counter counts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810501470.4A CN108856307A (en) | 2018-05-23 | 2018-05-23 | A kind of mechanical equipment position detecting device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501470.4A CN108856307A (en) | 2018-05-23 | 2018-05-23 | A kind of mechanical equipment position detecting device and detection method |
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| CN108856307A true CN108856307A (en) | 2018-11-23 |
Family
ID=64334042
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| CN201810501470.4A Pending CN108856307A (en) | 2018-05-23 | 2018-05-23 | A kind of mechanical equipment position detecting device and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061734A (en) * | 2019-04-12 | 2019-07-26 | 北京无线电测量研究所 | A kind of inertial navigation component output pulse counting method and device |
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| CN102975087A (en) * | 2012-12-21 | 2013-03-20 | 李绣峰 | Hob grinder |
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| CN110061734A (en) * | 2019-04-12 | 2019-07-26 | 北京无线电测量研究所 | A kind of inertial navigation component output pulse counting method and device |
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Application publication date: 20181123 |