CN105236223A - Inertia measuring system and method - Google Patents
Inertia measuring system and method Download PDFInfo
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- CN105236223A CN105236223A CN201510613801.XA CN201510613801A CN105236223A CN 105236223 A CN105236223 A CN 105236223A CN 201510613801 A CN201510613801 A CN 201510613801A CN 105236223 A CN105236223 A CN 105236223A
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Abstract
The invention relates to an inertia measuring system and method. The inertia measuring method comprises the steps that the sliding accelerated speed a of a car and the static torque M of a traction machine are measured, and elevator inertia I is obtained through the sliding accelerated speed of the car and the static torque of the traction machine; under the state that a brake is released and the traction machine does not exert torque, the car is made to freely fall in a sliding state, and the sliding accelerated speed of the car is obtained; and under the state that the brake is released and the car is static, the static torque of the traction machine is obtained. As for the elevator inertia obtained through the calculation, the influence of structures and parts relevant to an elevator in actual operation is fully considered, the obtained elevator inertia is precise and reliable, the basis can be provided for optimization of elevator speed control parameters, and the on-site mechanical arrangement condition of the elevator can also be checked.
Description
Technical field
The invention belongs to elevator, gig field, be specifically related to a kind of inertia measuring system and method.
Background technology
The control of elevator, operation need to consider elevator inertia, and the acquisition of traditional elevator inertia is by calculating the quality nominal value of elevator components.But, elevator machine number of components is hundreds and thousands of, thus the calculation of complex of mechanical inertia is caused, and accuracy is low, there is tolerance in the quality nominal value and the parts real quality that add upper-part, thus this error calculated is very large, can not instruct the optimization of elevator speed controling parameters well, can not check the situ configuration problem of elevator whereby.In addition, because elevator customer can be revised decoration recast in some cases, thus larger difficulty is brought to the accurate acquisition of elevator machine inertia.Therefore, for the Measurement accuracy of on-the-spot elevator inertia, particularly difficulty.
Summary of the invention
Based on this, the invention reside in the defect overcoming prior art, a kind of inertia measuring system and method are provided, measure elevator inertia easily and accurately.
Its technical scheme is as follows:
A kind of inertia method of measurement, comprising: that measures car slips car acceleration/accel a and measure the static torque M of towing machine, slips car acceleration/accel and towing machine torque obtain elevator inertia I by car; Wherein, under the state that releasing of brake, towing machine do not apply torque, make car free fall for slipping car state, what obtain car slips car acceleration/accel; Under the state of releasing of brake, car stationary, obtain the static torque of towing machine.
Wherein in an embodiment, comprise step: brak control unit controls described drg makes it unclamp, driving control unit controls towing machine makes it not apply torque, make described car enter described in slip car state, slip car acceleration/accel described in acquisition; Brak control unit controls described drg makes it unclamp, and driving control unit controls towing machine and applies opposing torque, makes car from described car state of slipping to quiescence, obtains described static torque; Slip described in acquisition car acceleration/accel, obtain described static torque after, brak control unit controls described drg makes it hold tightly.
Wherein in an embodiment, until described car enter slip car state and slip car steadily after, then described in detecting, slip car acceleration/accel.
Wherein in an embodiment, in rotating shaft place of described towing machine, rotation sensor is set, detect the rotating speed of described towing machine, obtain the displacement data of described car according to the rotating speed of described towing machine, second differential is carried out to described displacement data and obtains and described in described car, to slip car acceleration/accel; Or arrange speed sensor on described car or counterweight, described speed sensor detects the speed data obtaining described car, differential is carried out to described speed data and obtains and described in described car, to slip car acceleration/accel; Or, described car or counterweight arrange acceleration pick-up, described acceleration pick-up detect obtain described in slip car acceleration/accel.
Wherein in an embodiment, described towing machine adopts transducer drive, and the electric current exported by described frequency converter obtains described static torque.
Wherein in an embodiment, according to the arbitrary described inertia method of measurement of Claims 1-4, it is characterized in that, inertia method of measurement according to claim 1, it is characterized in that, elevator inertia I, car slip car acceleration/accel a, towing machine static torque M meet:
Wherein, g is elevator locus acceleration due to gravity;
K is the hanging ratio of elevator, i.e. the ratio of the linear velocity of towing machine and the speed of car;
R is the diameter of the rope sheave of towing machine traction car.
A kind of inertia measuring system, comprising: controller, and drg, the towing machine of described controller and elevator dock respectively, and described controller is for the mode of operation of control brake, towing machine; Acceleration detecting unit, described acceleration detecting unit and car or counterweight or towing machine dock, and slip and slip car acceleration/accel for detecting the car when releasing of brake, towing machine do not apply torque under car state;
Torque test unit, described Torque test unit docks with described towing machine or described controller, for detecting the static torque of towing machine under releasing of brake, car stationary state;
Inertia calculation unit, described acceleration detecting unit and described Torque test unit dock with described inertia calculation unit respectively; Wherein, the described car acceleration/accel that slips is sent to described inertia calculation unit by described acceleration detecting unit, described static torque is sent to described inertia calculation unit by described Torque test unit, described inertia calculation unit according to described in slip car acceleration/accel and described static torque calculation and obtain elevator inertia.
Wherein in an embodiment, described controller comprises apparatus for controlling elevator, brak control unit, variable frequency drive unit; Wherein, described apparatus for controlling elevator docks with described brak control unit, described variable frequency drive unit signal respectively, described brak control unit docks with described drg, and described variable frequency drive unit is docked with described towing machine, and described Torque test unit docks with described variable frequency drive unit.
Wherein in an embodiment, described inertia calculation unit docks with described apparatus for controlling elevator signal, and sends the signal whether completing inertia calculation to described apparatus for controlling elevator.
Wherein in an embodiment, described acceleration detecting unit comprises rotation sensor, and rotating shaft place of described towing machine is located at by described rotation sensor, for detecting the rotating speed of described towing machine; Or described acceleration detecting unit comprises speed sensor, described speed sensor is located on described car or counterweight, and described speed sensor is for detecting the speed of car; Or described acceleration detecting unit comprises acceleration pick-up, described acceleration pick-up is located on described car or counterweight, and described acceleration pick-up is for detecting the acceleration/accel of car.
Beneficial effect of the present invention is:
Under the state that releasing of brake, towing machine do not apply torque, make car free fall for slipping car state, what obtain car slips car acceleration/accel; Under the state of releasing of brake, car stationary, obtain the static torque of towing machine.Slip car acceleration/accel and towing machine torque by car and obtain elevator inertia, take into full account the impact in real-world operation of elevator dependency structure, part, the elevator inertia obtained is accurately reliable, can be elevator speed Optimization about control parameter and provides foundation, also can check the mechanical arrangements situation of on-the-spot elevator.Further, in the detection of elevator inertia, computation process, do not need to change elevator and normally run required agent structure, do not affect the safe operation of elevator.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of embodiment of the present invention inertia measuring system;
Fig. 2 is the state parameter figure of elevator in embodiment of the present invention elevator inertia testing process.
Description of reference numerals:
100, apparatus for controlling elevator, 210, brak control unit, 220, variable frequency drive unit, 300, towing machine, 400, drg, 510, acceleration detecting unit, 520, Torque test unit, 600, inertia calculation unit.
Detailed description of the invention
Below the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, inertia measuring system comprises: controller, acceleration detecting unit 510, Torque test unit 520, inertia calculation unit 600, and controller comprises apparatus for controlling elevator 100, brak control unit 210, variable frequency drive unit 220.
Wherein, apparatus for controlling elevator 100 docks with brak control unit 210, variable frequency drive unit 220 signal respectively, and brak control unit 210 docks with drg 400, and variable frequency drive unit 220 is docked with towing machine 300.Apparatus for controlling elevator 100 transmits control signal respectively to brak control unit 210, variable frequency drive unit 220, according to the control signal received, the mode of operation of brak control unit 210 control brake 400, variable frequency drive unit 220 control the mode of operation of towing machine 300.
Acceleration detecting unit 510 and car or counterweight or towing machine 300 dock, unclamp at drg 400 for measuring, towing machine 300 when not applying torque car slip and slip car acceleration/accel under car state.Include but not limited to following three kinds of modes, optimum way can be chosen according to elevator system configuration, implementation cost etc.:
1, acceleration detecting unit 510 comprises rotation sensor, rotating shaft place of towing machine 300 is located at by rotation sensor, measure the rotating speed of towing machine 300, obtain the displacement data of car according to the rotating speed of towing machine 300, that carries out that second differential obtains car to displacement data slips car acceleration/accel;
2, acceleration detecting unit 510 comprises speed sensor, and speed sensor is located on car or counterweight, and speed sensor is measured and obtained the speed data of car, and that carries out that differential obtains car to speed data slips car acceleration/accel;
3, acceleration detecting unit 510 comprises acceleration pick-up, and acceleration pick-up is located on car or counterweight, and acceleration pick-up is measured acquisition and slipped car acceleration/accel.
Torque test unit 520 docks with variable frequency drive unit 220 (be not limited thereto, also can dock with towing machine 300 or controller), unclamps, the static torque of towing machine 300 under car stationary state for measuring at drg 400; Owing to adopting transducer drive to control towing machine 300, Torque test unit 520 is by measuring the electric current exported from frequency converter, and just can obtain the torque of corresponding moment towing machine 300, system architecture is simple, the convenient torque obtaining towing machine 300.
Acceleration detecting unit 510 and Torque test unit 520 dock with inertia calculation unit 600 respectively, acceleration detecting unit 510 will slip car acceleration/accel and send to inertia calculation unit 600, static torque is sent to inertia calculation unit 600 by Torque test unit 520, elevator inertia I, car slip car acceleration/accel a, towing machine 300 static torque M meet:
Wherein, g is elevator locus acceleration due to gravity;
K is the hanging ratio of elevator, i.e. the ratio of the linear velocity of towing machine 300 and the speed of car;
R is the diameter that towing machine 300 draws the rope sheave of car.
Inertia calculation unit 600 calculates elevator inertia I according to formula (1).
Inertia calculation unit 600 also docks with apparatus for controlling elevator 100 signal, after elevator inertia calculation completes, sends the signal whether completing inertia calculation to apparatus for controlling elevator 100.
Apparatus for controlling elevator 100 sends control signal respectively to brak control unit 210, variable frequency drive unit 220, brak control unit 210 carrys out control brake 400 by the control signal received from apparatus for controlling elevator 100 and when unclamps, when holds tightly, variable frequency drive unit 220 controls towing machine 300 by the control signal received from apparatus for controlling elevator 100 and when applies torque, and the direction of controlling torque and size, when elevator inertia is measured, include but not limited to following steps:
A. brak control unit 210 control brake 400 makes it unclamp, variable frequency drive unit 220 controls towing machine 300 makes it not apply torque, car is entered slip car state, until car slip car steadily after, acceleration detecting unit 510 obtains and slips car acceleration/accel a, and will slip car acceleration/accel a and send to inertia calculation unit 600.Wherein, the car real time acceleration value measured by acceleration detecting unit 510, when after car real time acceleration value stabilization, can think that car slips car steadily, with the acceleration/accel of now car for described in slip car acceleration/accel.As shown in Figure 2, car falls from quiescence, to slipping car plateau, acceleration/accel time initial increases gradually from 0, then acceleration/accel tends to be steady gradually to enter and slips car stabilized conditions, the acceleration/accel that rear car stablized by the car that slips almost no longer changes, wait slip to measure car after car is stablized again slip car acceleration/accel, more accurately.
B. brak control unit 210 control brake 400 maintains releasing orientation, variable frequency drive unit 220 controls towing machine 300 and applies opposing torque, make car from slipping car state to quiescence, after car stationary, the electric current that Torque test unit 520 is exported by frequency-variable controller during reading car stationary, be converted to the torque value of towing machine 300 by three or two transformation approach, as static torque M, and static torque M sent to inertia calculation unit 600.
C. inertia calculation unit 600 receives to slip after car acceleration/accel a, static torque M and calculates elevator inertia I by formula (1).
D. after inertia calculation unit 600 calculates acquisition elevator inertia I, send and calculate settling signal to apparatus for controlling elevator, apparatus for controlling elevator sends control signal respectively to brak control unit 210, variable frequency drive unit 220, make brak control unit 210 control brake 400 that drg 400 is held tightly, make variable frequency drive unit 220 control towing machine 300 and do not apply torque.
According to the elevator inertia calculated above, take into full account the impact in real-world operation of elevator dependency structure, part, the elevator inertia obtained is accurately reliable, can be elevator speed Optimization about control parameter and provides foundation, also can check the mechanical arrangements situation of on-the-spot elevator.Further, on-site measurement is only needed to slip car acceleration/accel, static torque two parameters, simple to operate, do not need to change elevator and normally run required agent structure, do not affect the safe operation of elevator.
Each technical characteristic of above embodiment can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification sheets is recorded.
Above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an inertia method of measurement, is characterized in that, comprising: that measures car slips car acceleration/accel and measure the static torque of towing machine, obtains elevator inertia by the static torque of car acceleration/accel and towing machine of slipping of car;
Wherein, under the state that releasing of brake, towing machine do not apply torque, make car free fall for slipping car state, what obtain car slips car acceleration/accel; Under the state of releasing of brake, car stationary, obtain the static torque of towing machine.
2. inertia method of measurement according to claim 1, is characterized in that, comprising:
Brak control unit controls described drg makes it unclamp, and driving control unit controls towing machine makes it not apply torque, make described car enter described in slip car state, slip car acceleration/accel described in acquisition;
Brak control unit controls described drg makes it unclamp, and driving control unit controls towing machine and applies opposing torque, makes car from described car state of slipping to quiescence, obtains described static torque;
Slip described in acquisition car acceleration/accel, obtain described static torque after, brak control unit controls described drg makes it hold tightly.
3. inertia method of measurement according to claim 2, is characterized in that, until slip described in described car enters car state and slip car steadily after, then described in measuring, slip car acceleration/accel.
4. inertia method of measurement according to claim 1, it is characterized in that, in rotating shaft place of described towing machine, rotation sensor is set, measure the rotating speed of described towing machine, obtain the displacement data of described car according to the rotating speed of described towing machine, second differential is carried out to described displacement data and obtains and described in described car, to slip car acceleration/accel;
Or, described car or counterweight arrange speed sensor, are measured the speed data obtaining described car by described speed sensor, differential is carried out to described speed data and obtains and described in described car, to slip car acceleration/accel;
Or, described car or counterweight arrange acceleration pick-up, by slipping car acceleration/accel described in described acceleration pick-up measurement acquisition.
5. inertia method of measurement according to claim 1, is characterized in that, described towing machine adopts transducer drive, and the electric current exported by described frequency converter obtains described static torque.
6., according to the arbitrary described inertia method of measurement of claim 1 to 5, it is characterized in that, elevator inertia I, car slip car acceleration/accel a, towing machine static torque M meet:
Wherein, g is elevator locus acceleration due to gravity;
K is the hanging ratio of elevator, i.e. the ratio of the linear velocity of towing machine and the speed of car;
R is the diameter of the rope sheave of towing machine traction car.
7. an inertia measuring system, is characterized in that, comprising:
Controller, drg, the towing machine of described controller and elevator dock respectively, and the mode of operation of control brake, towing machine respectively;
Acceleration detecting unit, described acceleration detecting unit and car or counterweight or towing machine dock, and slip and slip car acceleration/accel for measuring the car when releasing of brake, towing machine do not apply torque under car state;
Torque test unit, described Torque test unit docks with described towing machine or described controller, for measuring the static torque of towing machine under releasing of brake, car stationary state;
Inertia calculation unit, described acceleration detecting unit and described Torque test unit dock with described inertia calculation unit respectively;
Wherein, the described car acceleration/accel that slips is sent to described inertia calculation unit by described acceleration detecting unit, described static torque is sent to described inertia calculation unit by described Torque test unit, described inertia calculation unit according to described in slip car acceleration/accel and described static torque calculation and obtain elevator inertia.
8. inertia measuring system according to claim 7, is characterized in that, described controller comprises apparatus for controlling elevator, brak control unit, variable frequency drive unit;
Wherein, described apparatus for controlling elevator docks with described brak control unit, described variable frequency drive unit signal respectively, described brak control unit docks with described drg, and described variable frequency drive unit is docked with described towing machine, and described Torque test unit docks with described variable frequency drive unit.
9. inertia measuring system according to claim 8, is characterized in that, described inertia calculation unit docks with described apparatus for controlling elevator signal, and sends the signal whether completing elevator inertia calculation to described apparatus for controlling elevator.
10. inertia measuring system according to claim 7, is characterized in that, described acceleration detecting unit comprises rotation sensor, and rotating shaft place of described towing machine is located at by described rotation sensor, for measuring the rotating speed of described towing machine;
Or described acceleration detecting unit comprises speed sensor, described speed sensor is located on described car or counterweight, and described speed sensor is for measuring the speed of car;
Or described acceleration detecting unit comprises acceleration pick-up, described acceleration pick-up is located on described car or counterweight, and described acceleration pick-up is for measuring the acceleration/accel of car.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106966248A (en) * | 2017-04-25 | 2017-07-21 | 快意电梯股份有限公司 | Car accidental movement monitoring device, method and its protection device and method |
| CN106946113B (en) * | 2017-05-15 | 2017-12-26 | 暨南大学 | A kind of no-load elevator brake friction torque test method |
| CN110407049A (en) * | 2018-04-26 | 2019-11-05 | 通力股份公司 | The status monitoring of inductive brake device |
| CN112154115A (en) * | 2018-05-09 | 2020-12-29 | 三菱电机株式会社 | Elevator device and test method of emergency stop inspection device |
| CN112960501A (en) * | 2021-02-23 | 2021-06-15 | 杭州优迈科技有限公司 | Elevator operation control method and device and electronic equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106966248A (en) * | 2017-04-25 | 2017-07-21 | 快意电梯股份有限公司 | Car accidental movement monitoring device, method and its protection device and method |
| CN106946113B (en) * | 2017-05-15 | 2017-12-26 | 暨南大学 | A kind of no-load elevator brake friction torque test method |
| CN110407049A (en) * | 2018-04-26 | 2019-11-05 | 通力股份公司 | The status monitoring of inductive brake device |
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| CN112154115A (en) * | 2018-05-09 | 2020-12-29 | 三菱电机株式会社 | Elevator device and test method of emergency stop inspection device |
| CN112154115B (en) * | 2018-05-09 | 2022-03-29 | 三菱电机株式会社 | Elevator device and test method of emergency stop inspection device |
| CN112960501A (en) * | 2021-02-23 | 2021-06-15 | 杭州优迈科技有限公司 | Elevator operation control method and device and electronic equipment |
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