CN108760108A - Crane wheel pressure detection method based on stress survey technology - Google Patents

Crane wheel pressure detection method based on stress survey technology Download PDF

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Publication number
CN108760108A
CN108760108A CN201810502400.0A CN201810502400A CN108760108A CN 108760108 A CN108760108 A CN 108760108A CN 201810502400 A CN201810502400 A CN 201810502400A CN 108760108 A CN108760108 A CN 108760108A
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CN
China
Prior art keywords
wheel
crane
track
strain
load
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Pending
Application number
CN201810502400.0A
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Chinese (zh)
Inventor
李贵文
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SHANGHAI JINYI INSPECTION TECHNOLOGY Co Ltd
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SHANGHAI JINYI INSPECTION TECHNOLOGY Co Ltd
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Priority to CN201810502400.0A priority Critical patent/CN108760108A/en
Publication of CN108760108A publication Critical patent/CN108760108A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/20Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges

Abstract

The invention discloses a kind of crane wheel pressure detection method based on stress survey technology, this method arrange that foil gauge, foil gauge signal connection stress test monitoring system simultaneously show, store and analyze in crane track;The track for being pasted with foil gauge is passed through in unloaded crane operation, and stress test monitors system acquisition strain signal, reads track strain valley caused by each wheel and calculates its average value and summation;The wheel load of each wheel is obtained according to crane overall mass, and then obtains the correspondence of track strain and wheel load;The operation of load crane is set to pass through track, stress test monitors system and reads track strain valley caused by each wheel, calculates the wheel load of crane each wheel in loading status with the correspondence of wheel load using track strain when zero load.The actual size of each wheel load of this method energy Accurate Determining, the intuitive inhomogeneities for reflecting crane wheel load under various operating modes provide basic data for wheel design optimization, operation and maintenance.

Description

Crane wheel pressure detection method based on stress survey technology
Technical field
The present invention relates to a kind of crane wheel pressure detection method based on stress survey technology.
Background technology
With the continuous development of logistic industry and industrial construction, the owning amount of crane increases sharply, and tonnage demand is not yet Disconnected to improve, crane develops towards enlargement, efficient and heavy-duty direction, in order to control the wheel load of crane wheel, vehicle The quantity of wheel is also mounted so as to more and more.With the increase of wheel count, wheel load it is accurate calculating it is just more difficult, calculated value with The deviation of actual value is also more difficult to expect.In engineer application field, part crane is related to upgrading, later wheel load Variation can carry out great influence to the safety belt of entire workshop, most important for the safety of entire mill construction.Therefore, it is necessary to The true actual size for grasping crane wheel load, be the design optimization of crane wheel, operation and maintenance and save civil engineering at This offer basic data.
Traditional wheel load measurement method takes jack cooperation pressure sensor to measure mostly, but this method prepares week Phase is long, measure stability and measurement accuracy is poor, especially jack jack-up construction when easily cause safety accident.The test method Since its method heaviness, inefficiency, Reliability comparotive are poor, seldom apply substantially at present.
Invention content
Technical problem to be solved by the invention is to provide a kind of crane wheel load detection side based on stress survey technology Method, this method overcome the defect of traditional wheel load measurement method, are easy to implement, the actual size of the energy each wheel load of Accurate Determining, The inhomogeneities of intuitive reflection crane wheel load under various operating modes, carries for the design optimization of crane wheel, operation and maintenance For basic data.
In order to solve the above technical problems, including as follows the present invention is based on the crane wheel pressure detection method of stress survey technology Step:
Step 1: selection can ensure the cart orbital position arrangement foil gauge that all wheels of crane can be transferred through, foil gauge It is pasted on the two sides of track respectively, and foil gauge resistance wire length direction is perpendicular to rail top face;
Step 2: foil gauge output signal connection stress test is monitored system, the data for straining built-in testing pass through stress test Monitoring system shows, stores and analyzes;
Step 3: unloaded crane operation is made to pass through the track for being pasted with foil gauge, stress test monitoring system acquisition is answered Varying signal reads track strain valley f caused by each wheeli, and calculate its average value Fi
Fi= (fiA+fiB)/2
Wherein:fiAAnd fiBThe track for being respectively set to track both sides strain measurement strains valley, i=1~n, and n is wheel number Amount;
Then strain the summation of valley average value,
Known crane overall mass is M, then its corresponding gravity G=M × g, and g is acceleration of gravity;
Then when crane light condition each wheel wheel load Pi=G*Fi/ F,
Its middle orbit is strained is with the correspondence K of wheel load:K=G/F;
Step 4: the operation of load crane is made to pass through the track for being pasted with foil gauge, stress test monitoring system acquisition is answered Varying signal reads track strain valley j caused by each wheeli, i=1~n, n is wheel count,
Using correspondence K=G/F of track strain and wheel load when crane zero load, it is each in loading status to calculate crane The wheel load Q of wheeli=K×ji
Further, the foil gauge be 120 ohm of resistance value, grid length 6mm, adhesive type temperature compensation resistance strain gauge.
Further, the strain gauge adhesion is in the track centre position of adjacent orbit pressing plate.
Since the crane wheel pressure detection method the present invention is based on stress survey technology uses above-mentioned technical proposal, i.e. this method Arrange that several foil gauges, foil gauge output signal connection stress test monitoring system simultaneously show, store in crane track And analysis;The track for being pasted with foil gauge is passed through in unloaded crane operation, and stress test monitors system acquisition strain signal, It reads track strain valley caused by each wheel and calculates its average value and summation;Each vehicle is obtained according to crane overall mass The wheel load of wheel, and then obtain the correspondence of track strain and wheel load;The operation of load crane is set to pass through track, stress is surveyed It tries monitoring system and reads track strain valley caused by each wheel, utilize the correspondence meter of track strain and wheel load when zero load Calculate the wheel load of crane each wheel in loading status.This method overcomes the defect of traditional wheel load measurement method, implements letter Just, the actual size of the energy each wheel load of Accurate Determining, the intuitive inhomogeneities for reflecting crane wheel load under various operating modes, to rise The design optimization of heavy-duty machine wheel, operation and maintenance provide basic data.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is that schematic diagram is arranged in foil gauge in this method;
Fig. 2 is crane wheel in this method in cart track operation schematic diagram.
Specific implementation mode
Embodiment is as depicted in figs. 1 and 2, includes such as the present invention is based on the crane wheel pressure detection method of stress survey technology Lower step:
Step 1: selection can ensure the 1 location arrangements foil gauge 2 of cart track that all wheels of crane can be transferred through, strain Piece 2 is pasted on the two sides of track 1 respectively, and 2 resistance wire length direction of foil gauge is perpendicular to 1 top surface of track;
Step 2: 2 output signal of foil gauge connection stress test is monitored system, the data that foil gauge 2 is tested are surveyed by stress Examination monitoring system shows, stores and analyzes;
Step 3: unloaded crane operation is made to pass through the track 1 for being pasted with foil gauge 2, stress test monitors system acquisition Strain signal reads track strain valley f caused by each wheel 3i, and calculate its average value Fi
Fi= (fiA+fiB)/2
Wherein:fiAAnd fiBThe track for being respectively set to the detection of 1 both sides foil gauge 2 of track strains valley, i=1~n, and n is wheel number Amount;
Then strain the summation of valley average value,
Known crane overall mass is M, then its corresponding gravity G=M × g, and g is acceleration of gravity;
Then when crane light condition each wheel wheel load Pi=G*Fi/ F,
Its middle orbit is strained is with the correspondence K of wheel load:K=G/F;
Step 4: the operation of load crane is made to pass through the track 1 for being pasted with foil gauge 2, stress test monitors system acquisition Strain signal reads track strain valley j caused by each wheel 3i, i=1~n, n is wheel count,
Using correspondence K=G/F of track strain and wheel load when crane zero load, it is each in loading status to calculate crane The wheel load Q of wheeli=K×ji
Preferably, the foil gauge 2 be 120 ohm of resistance value, grid length 6mm, adhesive type temperature compensation resistance strain gauge.
Preferably, the foil gauge 2 is pasted on 1 centre position of track of adjacent orbit pressing plate.
This method mainly uses foil gauge, stress test monitoring system and mathematics computing model to complete lifting wheel jointly The detection of pressure, the measurement that wheel load numerical value is completed by on-the-spot test and calculating analysis can be accurate using easy measuring technology It is reliably achieved the accurate test of crane wheel load.
It is unique zero of power transmission between crane and cart track that wheel load measuring principle, which is exactly according to crane cart wheel, Part, the power of vertical direction comes from wheel on track, and crane wheel acts on the vertical direction on track when pressing through cart track Power the characteristics of track can be made to generate strain, the track side surfaces that strain gauge adhesion is passed by tested wheel, when wheel walk it is out-of-date Foil gauge deforms together with track, and corresponding variation will occur for the resistance value of foil gauge, and stress test monitors system by resistance Variation is converted into strain value and records, and the detection of load crane wheel load is realized by the analysis conversion of strain value.
If there is wheel load-strain calibration curve of standard that strain is converted into wheel load again, each cart wheel is allowed to press through It is furnished with the test point of foil gauge, the wheel load of each wheel can be measured.But since objective condition limits, in laboratory collection wheel Pressure-strain calibration curve is difficult accurately to obtain, therefore complete this method by design and analysis and practice.
Gross mass when nameplate can indicate crane zero load when usual crane manufacture, also just there is known the gross weight of crane Power (total force is multiplied by acceleration of gravity equal to gross mass), the total force phase of the summation and crane of wheel load when crane zero load Deng then total strain is proportional with total wheel load, also just proportional with the total force of crane.
Therefore, overall strain when measuring crane zero load just can determine the wheel load value corresponding to each strain, without Laboratory acquires wheel load-strain calibration curve.
When crane is unloaded, trolley is located at suitable position, cart pastes the track of foil gauge at the uniform velocity to be crossed compared with low velocity, Record strain time waveform, the valley strain value of each waveform corresponds to wheel load, by the dead weight of crane divided by total strain paddy Value just obtains the correspondence of track strain and wheel load, that is, is demarcated.
Then, the lifting capacity of setting can be lifted by crane according to the measurement condition of setting, trolley is located at the position of setting, starts Cart allows big wheel to press through the track for pasting foil gauge, acquires corresponding strain value, and changing for system is monitored by stress test Calculate, can directly in the case that setting wheel load value of each wheel of lifting capacity under various operating modes, it is very convenient.This method has Effect reduces testing cost, and foil gauge install convenient, avoids influence of the manually installed operation to accuracy of detection, improves detection essence Degree.
This method measuring point is few, and pieces of cloth are convenient, instrument connection and its easy to operate, avoids the safety tested using jack Risk and inefficiency overcome on wheel the defect of pieces of cloth, be movement due to wheel, and with the connection of surrounding components More, space is restricted, and pieces of cloth are both needed on each wheel just can measure the wheel load of each wheel, and the more pieces of cloth of wheel count are surveyed Point is more, and arrangement foil gauge and the difficulty for connecting instrument are bigger.And pieces of cloth in orbit, due to track fixes, it is straight, have compared with The space of loose arrangement foil gauge, convenient for the arrangement of foil gauge and instrument, connection, and when pieces of cloth measuring point is more, needs 4, it is few then 2 can be used.
The measuring point data that this method obtains can not only learn the actual size of each wheel wheel load under any setting operating mode, Difference of each wheel in rail top face both sides wheel load value and its state in which in wheel wheel load can also intuitively be understood, determined The maximum wheel position of wheel load.This method, which can not only make up conventional method, cannot accurately calculate lacking for the practical wheel load of each wheel It falls into, moreover it is possible to when breaking away from experimental method measurement crane maximum wheel load, under the same supporting leg of crane, have the case where multiple wheels, nothing Method determines the deficiency for the wheel position for bearing maximum wheel load.
This method is easy, practical, the actual size of the energy each wheel load of Accurate Determining, intuitive to reflect crane in various work In the case of wheel load inhomogeneities, provide basic data for the design optimization of crane wheel, operation and maintenance.This method can answer In more severe for test site environment crane wheel load test, can also in same category of device practice and extension, such as heap Reclaimer, ship unloaders etc..

Claims (3)

1. a kind of crane wheel pressure detection method based on stress survey technology, it is characterised in that this method includes the following steps:
Step 1: selection can ensure the cart orbital position arrangement foil gauge that all wheels of crane can be transferred through, foil gauge It is pasted on the two sides of track respectively, and foil gauge resistance wire length direction is perpendicular to rail top face;
Step 2: foil gauge output signal connection stress test is monitored system, the data for straining built-in testing pass through stress test Monitoring system shows, stores and analyzes;
Step 3: unloaded crane operation is made to pass through the track for being pasted with foil gauge, stress test monitoring system acquisition is answered Varying signal reads track strain valley f caused by each wheeli, and calculate its average value Fi
Fi= (fiA+fiB)/2
Wherein:fiAAnd fiBThe track for being respectively set to track both sides strain measurement strains valley, and i=1~n, n is wheel count;
Then strain the summation of valley average value,
Known crane overall mass is M, then its corresponding gravity G=M × g, and g is acceleration of gravity;
Then when crane light condition each wheel wheel load Pi=G*Fi/ F,
Its middle orbit is strained is with the correspondence K of wheel load:K=G/F;
Step 4: the operation of load crane is made to pass through the track for being pasted with foil gauge, stress test monitoring system acquisition is answered Varying signal reads track strain valley j caused by each wheeli, i=1~n, n is wheel count,
Using correspondence K=G/F of track strain and wheel load when crane zero load, it is each in loading status to calculate crane The wheel load Q of wheeli=K×ji
2. the crane wheel pressure detection method according to claim 1 based on stress survey technology, it is characterised in that:It is described Foil gauge be 120 ohm of resistance value, grid length 6mm, adhesive type temperature compensation resistance strain gauge.
3. the crane wheel pressure detection method according to claim 1 or 2 based on stress survey technology, it is characterised in that: The strain gauge adhesion is in the track centre position of adjacent orbit pressing plate.
CN201810502400.0A 2018-05-23 2018-05-23 Crane wheel pressure detection method based on stress survey technology Pending CN108760108A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109784000A (en) * 2019-03-20 2019-05-21 福建省特种设备检验研究院 A kind of crane wheel pressure detection method based on plastic deformation
CN112284585A (en) * 2020-10-16 2021-01-29 广州特种机电设备检测研究院 Device based on optical fiber testing wheel pressure
CN113063615A (en) * 2021-03-22 2021-07-02 中海石油气电集团有限责任公司 Testing device and testing method for curved rail type crane

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104034469A (en) * 2014-06-16 2014-09-10 江苏省特种设备安全监督检验研究院南通分院 Measuring method for crane cart wheel pressure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104034469A (en) * 2014-06-16 2014-09-10 江苏省特种设备安全监督检验研究院南通分院 Measuring method for crane cart wheel pressure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109784000A (en) * 2019-03-20 2019-05-21 福建省特种设备检验研究院 A kind of crane wheel pressure detection method based on plastic deformation
CN109784000B (en) * 2019-03-20 2022-05-03 福建省特种设备检验研究院 Crane wheel pressure detection method based on plastic deformation
CN112284585A (en) * 2020-10-16 2021-01-29 广州特种机电设备检测研究院 Device based on optical fiber testing wheel pressure
CN113063615A (en) * 2021-03-22 2021-07-02 中海石油气电集团有限责任公司 Testing device and testing method for curved rail type crane

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