CN85109067A - Engine puts on the assay method of the loading moment on the rotary load - Google Patents
Engine puts on the assay method of the loading moment on the rotary load Download PDFInfo
- Publication number
- CN85109067A CN85109067A CN198585109067A CN85109067A CN85109067A CN 85109067 A CN85109067 A CN 85109067A CN 198585109067 A CN198585109067 A CN 198585109067A CN 85109067 A CN85109067 A CN 85109067A CN 85109067 A CN85109067 A CN 85109067A
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- China
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- input end
- output terminal
- rotating speed
- engine
- moment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Measure the method that engine is applied to the loading moment on the rotary load.
Be applied to moment on the rotary load for measure engine simple and reliablely,, deposit a storer in as the funtcional relationship between the inlet pressure of the drive current of rotating speed, motor or internal combustion engine with the driving moment and a measurable operational factor of engine; Measure rotating speed in the back at interval at preset time, obtain the difference of two rotating speeds that record in succession, divided by preset time at interval, again the quotient that obtains is multiplied each other with the factor that and total moment of inertia are directly proportional.From storer, read the engine driving torque corresponding, deduct and amassing that the above-mentioned factor multiplies each other and obtains with the instantaneous value of operational factor.
Description
The invention relates to mensuration is put on the loading moment on the rotary load by engine a kind of method.In the method, angular velocity the difference quotient of time is derived by tachometric survey and Lai ， And with one and always the proportional factor of moment of inertia multiply each other, the value with gained deducts from the driving moment of the engine corresponding with a measurable operational factor instantaneous value again.
For obtaining the information of momentary load situation, wish usually to find out the moment of rotating shaft by measuring.Proposed multiple measurement mechanism for this purpose,, determined moment by measuring twisting stress as strainometer is placed in the rotating shaft.Measuring moment with these known methods often can't be approaching because of rotating shaft, or used testing tool is solid inadequately, and impossible realization or expense are very expensive.
There is a kind of known similar this paper to begin described such method (German application of having delivered 2702981) and measures the Dian pivot Dian Liu And of direct current motor and multiply by a constant, thereby obtain a signal that is characterized in maximum moment under the full excitation.For the motor that the situation that is operated in often changes, this method only relatively provides inaccurate numerical value, and can not be used for the engine of other types, as internal combustion engine.
Be the ability of monitoring internal combustion engine, the German application of having delivered 3103648 has proposed a kind of method of measuring average moment.It measures the time of two speed threshold values of experience in raising speed and the reduction of speed test, calculates average moment by known formula by the above-mentioned time.But this method can not be measured the interested instantaneous moment of common people.
The object of the present invention is to provide a kind of method and apparatus, be applied to instantaneous moment on the rotary load so that measure engine very accurately by the better way mode.
With the described at the beginning such method of this paper, can be according to the present invention with the variation of engine driving torque operational factor measurable with it, deposit a storer in as the relation between the inlet pressure of the drive current of rotating speed, motor or internal combustion engine, from this storer, read the instantaneous driving moment of engine to be measured, thereby realized this purpose.
According to the present invention, the advantage of the method is that the tachometric survey of time is sufficient for measuring momentary load moment in succession.The total available multiple known method of the analogue measurement of rotating speed realizes, even under difficult condition.
There is a kind of like this method to measure motor and is added in loading moment on the rotary load: at preset time interval measurement rotating speed, first rotating speed that records will multiply by first weighting factor, second rotating speed that records will multiply by second weighting factor, second weighting rotating speed that will obtain then deducts from first weighting rotating speed, a corresponding constant of driving moment of motor when the difference that draws is added and is zero with rotating speed.This method based on the electric moment of supposing driving motor in most of the cases and the relation between its rotating speed can be enough can accuracy be considered as straight line, thereby need not properties store.
In this case, in this method with weighting factor take advantage of the rotating speed that records in succession can be reduced to the pulse repetition rate that is directly proportional with rotating speed separately with the proportional gate time of weighting factor in step-by-step counting.
For in realizing according to one of the inventive method desirable device, the output terminal of revolution detector is received the input end of a change-over switch, and two output terminals of this switch are received the input end of two memory buffer.Clock provides timing signal, and its output terminal is connected to the control input end of change-over switch and the control input end of two storeies respectively.Storer is made to alternately and reads, and its output terminal is received the input end of first subtracter.A divider is provided, and its input end is received the output terminal of subtracter, and another one is imported then receive clock signal.A properties store is provided, has wherein had the variable quantity of engine driving torque, this variable quantity can be measured operational parameter value, has as the function ， And of rotating speed and reads the value that input end receives operational factor.The instantaneous value of engine driving torque is presented on the properties store output terminal.Second subtracter is provided, and its first input end is connected to the output terminal of properties store, and second input end then received the output terminal of divider.
If the engine in this device is a motor, then can adopt output terminal to receive the motor current sensor of properties store input end.
In for the desirable device of realizing above-mentioned amending method, the output terminal of revolution detector is received the input end of a change-over switch, two output terminals of this switch are received the input end of two memory buffer, by the time clockwise change-over switch and buffering storer timing signal is provided.Two multipliers are provided, and its first input end is connected with corresponding memory buffer respectively, and second input end then receives the signal of representing first and second weighting factors respectively.The output terminal of multiplier is connected to two input ends of subtracter.Be provided with a totalizer, an one input end is received the output terminal of subtracter, and another input end then receives the signal that characterizes constant factor.
In this device, revolution detector can be made up of by known method a pulse producer and an impulse meter, and the latter ， And that is connected with pulse producer is controlled by clock.
Concrete device referring now to accompanying drawing further describes advantage of the present invention and characteristics.Wherein the curve table of Fig. 1 is understood the electric current of motor and the dependence between moment and the rotating speed, and Fig. 2 is a block scheme of measuring a device of loading moment according to the present invention, and Fig. 3 is another device of measuring loading moment according to the present invention.
The present invention is based on such hypothesis, promptly usually always can determine a fixing relation between the operational parameter value surveyed of the driving moment of engine and this engine.With reference to the example of motor, Fig. 1 has illustrated electrical drive power square M
ElAnd the relation between rotation speed n.Curve gives the funtcional relationship that the electric current I of motor changes with rotating speed among the figure.Certain electric moment M obviously
ElCan be clearly interrelate, and these operational factors are to measure easily with the electric current or the rotating speed of motor.Similarly situation also is applicable to other engine, as the internal combustion engine or the hydraulic turbine, for them, driving moment can with interrelate such as inlet pressure or hydraulic pressure.
In the block scheme of Fig. 2, the rotor 2 of motor 1 drives a rotary load 4 by axle 3.The input current I of motor can measure with current sensor 5, and the rotation speed n of motor can be measured with revolution detector 6.
The present invention relates to measure the loading moment M that passes to load 4 by axle 3
LRelation between the existing moment is deferred to following equation:
M
L＝M
el-
θ
R（1）
In the formula
M
ElThe electric moment of driving motor;
θ
RThe moment of inertia of substance for Spin.
In formula (1), if rotating speed is known, M
ElPromptly can learn from the family curve of motor.O
RBe the constant of system,
Then can from the rotating speed that records, derive, because
With what represent in the concrete installation drawing, these values can be from the beginning of measuring intervals of TIME Δ t and two rotation speed n at the end just as also
1, n
2And utilize following formula to determine:
(dn)/(dt) ＝（n
2-n
1）/Δt （3）
Device among Fig. 2 has comprised a change-over switch 7 for this reason, its input termination master revolution detector, its output terminal is connected to the input end of memory buffer 8,9, by clock 10 controls, thereby can measure rotating speed at interval later at preset time, and the difference between this rotating speed can be removed by the time interval.For example measure rotation speed n in certain time
1And deposits storer 9 in, measures rotation speed n behind time interval Δ t
2And deposits storer 8, n in
2, n
1Value give subtracter 11, calculate difference (n
2-n
1).The output terminal of subtracter 11 is connected to an input end of divider 12, the Δ t time signal of another input end receive clock 10 of divider.The result just characterizes (n at the signal of the output terminal appearance of divider
2-n
1The product of)/Δ t or it and factor pi/30.
M
ElFamily curve to rotation speed n or motor current I has deposited storer 13 in, so the M that occurs at storer 13 output terminals
ElSignal is relevant with the rotation speed n of measuring with current sensor and the instantaneous motor current I that measures or revolution detector 6.The output terminal of storer 13 is received the input end of second subtracter 14, and another input end of this subtracter is connected to the output terminal of divider 12, therefore torque signals M to be determined
L=M
El-
θ
RJust appear at the output terminal of subtracter 14.
Straight line shown in Fig. 1 is illustrated in electric moment M in certain range of speeds approx
ElVariation.For this reason, electric moment can be expressed as.
M
el＝C- (C)/(nc) ·n（t） （4）
To n=n
2, following formula provides with formula (1) and formula (3)
M
L＝C+n
1· (π)/30 · (θR)/(Δt) -n
2（ (C)/(n
c) - (π)/30 · (θR)/(Δt) ） （5）
Always remain unchanged if measure interval of delta t, formula (5) can be represented by following formula:
M
L＝C+n
1K
1-n
2K
2（5′）
In the formula
K
1＝ (π)/30 · (θR)/(Δt) ，K
2＝（ (C)/(n
c) - (π)/30 · (θR)/(Δt) ） （6）
Based on above simple declaration, can measure loading moment with device shown in Figure 3.
With reference to Fig. 3, on other rotary parts of axle 3 or the system that forms by motor 1 and load 4, adorned a pulse producer 15.Pulse producer 15 is directly proportional by the repetition frequency and the rotating speed of the pulse that known method produces.The output terminal of pulse producer is received the input end by the counter 16 of clock 17 controls.At the fixed time, the output terminal of the pulse number counter 16 of counter 16 calculated amount degree of testing the speed is connected to the input end of change-over switch 18.Here to point out that rotating speed can be used diverse ways, for example measure with the analogy method shown in Fig. 2.
Two output terminals of change-over switch 18 are connected to the input end of memory buffer 19,20, and memory buffer and change-over switch 18 all are subjected to clock 17 controls.Change-over switch 18 and storer 19,20 are subjected to such control, make the rotation speed n that records behind time interval Δ t separately
1, n
2Can obtain at its output terminal Deng alternately depositing storer 19,20 ， And in.Each output terminal of storer 19,20 is received corresponding one input end in the multiplier 21,22, receives respectively at another input end of multiplier and represents constant K in the formula (6)
1And K
2Signal.
Product n
1K
1And n
2K
2Appear at the output terminal of multiplier 21,22 respectively.These two output terminals are received two input ends of subtracter 23, thereby signal (n
1K
1-n
2K
2) appear at the output terminal of subtracter 23, it is offered an input end of totalizer 24, another input end of totalizer receives the signal that characterizes constant (C) in formula (4) or (5), thereby obtains the M that will measure at the output terminal of totalizer
LSignal, this signal is fed to display 25 or similar devices again.
Claims (7)
1, a kind ofly measures the method that engine is applied to the loading moment on the rotary load, wherein angular velocity is derived by measuring rotating speed the difference quotient of time, this difference quotient and one and total proportional factor of moment of inertia multiply each other, the value that obtains from one can survey the corresponding engine driving torque of operational factor instantaneous value and deduct, it is characterized in that engine driving torque can survey operational factor with one, variation as the inlet pressure of the drive current of rotating speed, motor or internal combustion engine is deposited in a storer, reads the instantaneous driving moment of engine during mensuration from this storer.
2, a kind ofly measure the method that motor is applied to the loading moment on the rotary load, its medium speed is measured the back at interval at preset time, it is characterized in that the rotating speed of taking advantage of first to record with first weighting factor, take advantage of second rotating speed that records with second weighting factor, from first weighting rotating speed, deduct second weighting rotating speed, again the difference that obtains is added a constant of the direct motor drive moment when being zero corresponding to rotating speed.
3, a kind of method according to claim 2, it is characterized in that by respectively with the proportional gate time of weighting factor in to counting with the proportional pulse repetition rate of rotating speed, the rotating speed and the weighting factor that record are in succession multiplied each other.
4, a kind of device of realizing according to the process of claim 1, it is characterized in that the output terminal of revolution detector (6) is connected to the input end of a change-over switch (7), two output terminals of the latter are connected to two memory buffer (8,9) the defeated end that gives, clock (10) provides timing signal (t) And to have output terminal to receive change-over switch (7) and two storeies (8 respectively, 9) control input end, this storer is alternately read, its output terminal is connected to two input ends of first subtracter (11), an input end of divider (12) is connected with the output terminal of subtracter (11), the signal (t) of another input end receive clock (10), properties store has engine driving torque (M in (13)
El) variable quantity, it is to survey operational parameter value, have as the function And of rotating speed (n) and to read the value that input end receives this operational factor, the instantaneous value of engine driving torque appears at the output terminal of properties store (13), be provided with second subtracter (14), its first input end is connected with the output terminal of properties store, and its second input end then is connected to the output terminal of divider (12).
5, a kind of device according to claim 4, wherein engine is a motor, it is characterized in that being provided with a motor current sensor (5), its output terminal is connected with the input end of properties store (13).
6, a kind of device of realizing according to the method for claim 2, it is characterized in that the output terminal of revolution detector (15,16) is connected to the input end of a change-over switch (18), two output terminals of the latter are connected to the input end of two memory buffer (19,20), clock (17) provides timing signal (Δ t) for change-over switch (18) and impact damper (19,20), be provided with two multipliers, first input end separately is connected with the output terminal of a corresponding memory buffer (19,20), and second input end then distinguished received signal (K
1, K
2), they represent first and second weighting factors respectively, the output terminal of multiplier is connected to two input ends of subtracter (23), be provided with a totalizer (24), an one input end is connected with the output terminal of subtracter (23), and another input end then receives the signal (C) that characterizes constant factor.
7, a kind of device according to claim 6, it is characterized in that by known method, form revolution detector by a pulse producer (15) and an impulse meter (16), impulse meter is right after that ， And is subjected to the control of clock (17) after pulse producer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA4080/84 | 1984-12-21 | ||
| AT0408084A AT382462B (en) | 1984-12-21 | 1984-12-21 | METHOD AND ARRANGEMENT FOR DETERMINING THE LOAD TORQUE ACTING BY A MOTOR ON A ROTATING LOAD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85109067A true CN85109067A (en) | 1986-06-10 |
Family
ID=3559381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585109067A Pending CN85109067A (en) | 1984-12-21 | 1985-12-20 | Engine puts on the assay method of the loading moment on the rotary load |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS61155826A (en) |
| CN (1) | CN85109067A (en) |
| AT (1) | AT382462B (en) |
| AU (1) | AU5152285A (en) |
| DE (1) | DE3543705A1 (en) |
| FR (1) | FR2575288A1 (en) |
| GB (1) | GB2168819A (en) |
| PL (1) | PL256986A1 (en) |
| ZA (1) | ZA859518B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101175980B (en) * | 2005-05-09 | 2010-05-12 | 株式会社爱安德 | Engine measuring device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3143620B2 (en) * | 1991-09-24 | 2001-03-07 | 日本パルスモーター株式会社 | Load torque measuring device for stepping motor |
| DE4138401A1 (en) * | 1991-11-22 | 1993-05-27 | Schrick Gmbh Dr | Measuring arrangement for motor vehicle engine power - contains flywheel attached to installed engine and having angular acceleration measured. |
| AT1407U1 (en) * | 1992-05-18 | 1997-04-25 | Elin Energieversorgung | METHOD FOR DETERMINING CHARACTERISTICS OF A ROTATING MACHINE |
| DE4320834A1 (en) * | 1992-06-26 | 1994-04-14 | Andreas Prof Dr Ing Seeliger | Torque measurement on shaft using breadth of teeth or holes in discs - employing two discs whose signals are compared to time of emission for compensation of distribution errors |
| JPH08152368A (en) * | 1994-11-30 | 1996-06-11 | Mitsubishi Electric Corp | Torsional torque detector, slip detector, road-surface friction-coefficient detector and torsional-torque detecting method |
| DE10256106B4 (en) | 2002-11-29 | 2006-01-12 | Audi Ag | Apparatus and method for estimating engine torque |
| CN111537123B (en) * | 2020-02-28 | 2022-08-23 | 重庆大学 | Industrial robot power prediction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE396658B (en) * | 1976-02-09 | 1977-09-26 | Asea Ab | WAY TO META AND POSSIBLY CONTROL OVER A MOTOR AXLE OUTPUT TORMS AND DEVICE FOR PERFORMING THIS SET |
| DE3103648A1 (en) * | 1981-02-04 | 1982-09-02 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for determining the average torque of an internal combustion engine |
| DE3246798A1 (en) * | 1982-12-17 | 1984-06-20 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | Arrangement for measuring engine torques |
-
1984
- 1984-12-21 AT AT0408084A patent/AT382462B/en not_active IP Right Cessation
-
1985
- 1985-12-06 GB GB08530066A patent/GB2168819A/en not_active Withdrawn
- 1985-12-11 DE DE19853543705 patent/DE3543705A1/en not_active Ceased
- 1985-12-12 ZA ZA859518A patent/ZA859518B/en unknown
- 1985-12-18 FR FR8518803A patent/FR2575288A1/en not_active Withdrawn
- 1985-12-20 CN CN198585109067A patent/CN85109067A/en active Pending
- 1985-12-20 PL PL25698685A patent/PL256986A1/en unknown
- 1985-12-20 JP JP60287612A patent/JPS61155826A/en active Pending
- 1985-12-20 AU AU51522/85A patent/AU5152285A/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101175980B (en) * | 2005-05-09 | 2010-05-12 | 株式会社爱安德 | Engine measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8530066D0 (en) | 1986-01-15 |
| AU5152285A (en) | 1986-06-26 |
| GB2168819A (en) | 1986-06-25 |
| AT382462B (en) | 1987-02-25 |
| PL256986A1 (en) | 1986-11-18 |
| JPS61155826A (en) | 1986-07-15 |
| ZA859518B (en) | 1986-08-27 |
| FR2575288A1 (en) | 1986-06-27 |
| DE3543705A1 (en) | 1986-06-26 |
| ATA408084A (en) | 1986-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Correction of invention patent gazette |
Correction item: Agent Correct: Zhang Shegao False: Zhang Jie Number: 6 Page: 63 Volume: 2 |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| ERR | Gazette correction |
Free format text: CORRECT FROM: (AGENT)ZHANG SHEGUO TO: (AGENT)ZHANG SHEGAO |