CN109341837B - Force measuring method for rail weighing unit verification and portable hydraulic force measuring device - Google Patents
Force measuring method for rail weighing unit verification and portable hydraulic force measuring device Download PDFInfo
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- CN109341837B CN109341837B CN201811313435.6A CN201811313435A CN109341837B CN 109341837 B CN109341837 B CN 109341837B CN 201811313435 A CN201811313435 A CN 201811313435A CN 109341837 B CN109341837 B CN 109341837B
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- 238000005303 weighing Methods 0.000 title claims abstract description 169
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- 238000001514 detection method Methods 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 7
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- 238000005259 measurement Methods 0.000 description 3
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- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
The invention discloses a force measuring method and a portable hydraulic force measuring device for rail weighing unit verification, belonging to the technical field of metrological verification, wherein the force measuring method for rail weighing unit verification comprises the following steps: 1) loading the weighing unit to be detected by using a loading unit; 2) transmitting the standard pressure data to a master control unit; 3) determining that all weighing units on two sides of the weighing platform are completely detected; 4) and calculating the accumulated error of the weighing platform. The portable hydraulic force measuring device is characterized by comprising a pinch plate auxiliary unit, a loading unit, a pressure sensor, a display screen, a data transmission unit and a master controller. The invention aims to solve the problems of long time consumption, high verification cost and poor safety in the verification process of the conventional force measuring device and method.
Description
Technical Field
The invention relates to the technical field of metrological verification, in particular to a force measuring method and a portable force measuring device for a rail weighing unit (a weighing unit of a locomotive vehicle weighing platform and a weighing unit of an urban rail vehicle weighing platform).
Background
The rolling stock weighing platform and the urban rail vehicle weighing platform (hereinafter referred to as weighing platforms) are railway special metering instruments used for measuring wheel weights, axle weights and total weights of various rolling stocks, motor train units and urban rail vehicles so as to determine the weights and weight distribution of the rolling stocks, the motor train units and the urban rail vehicles in a static state. The unbalance of wheel weights of rolling stock, motor train unit and urban rail vehicle easily causes the phenomena of eccentric wear of wheel rims and the like in the running process of the rolling stock, and the driving safety is influenced. Indexes such as wheel weights and the like need to be measured before delivery and after overhaul of rolling stocks and motor train units. When the load balance of the left wheel and the right wheel is adjusted, the thickness of the gasket needs to be guided and adjusted according to the measured load data of the left wheel and the right wheel, and the unbalance of the wheels and the gravity center shift are influenced by the difference of the thicknesses of the gasket. The weighing platform is generally combined by 8-24 electronic platform scales and designed according to the technical requirements and use characteristics of the rolling stock, and is generally arranged in a rolling stock manufacturing factory, a rolling stock overhaul factory, a motor train section or a vehicle overhaul warehouse of an urban rail transit enterprise to measure the weight of front wheels, axle weights and the weight of the whole rolling stock before delivery. The design of the weighing platform is required to meet the requirements of the verification regulations of TB/T2782-1997 technical conditions of the weighing platform of the railway rolling stock, TB/T1740-1997 weight determination method of the railway rolling stock and JJG 117-.
The weighing station must be certified for each of the constituent weighing cells before or after being placed into service, and subsequent certification and in-service inspection is also required after being placed into service. The existing measuring standard device and the matching equipment for detecting the weighing unit of the weighing platform mainly comprise: (1-15) t weights, a verification flat trolley, a crane (or a truck-mounted crane) and a support for stacking large weights.
The existing verification method comprises the following steps: a flat plate small vehicle is used for carrying weights (generally 15t) with certain weight, the weights are placed near one end of a weighing platform, a support for stacking and amplifying the weights is firstly installed on any weighing unit to be detected by a crane or a truck-mounted crane, at least 5 uniformly distributed detection points are determined, and the weights are loaded for 3 times on each detection point. The carrying, loading and unloading of the weights and the carrying of the support for stacking and amplifying the weights are completed in a matched mode through a crane or a truck crane, the operation intensity is high, the number of workers on site is large, verification data needs to be recorded manually, the whole verification process is long in time consumption, high in verification cost and poor in safety.
Because there is not convenient and practical's dynamometer in the market, main etalon only adopts (1 ~ 15) t weight, can only be according to loading weight nominal value single-point measurement, can't realize continuous loading measurement, and transport, the loading operation intensity of weight are big moreover, operational safety is poor, lead to the verification efficiency low.
Disclosure of Invention
In order to overcome the technical problems of the existing weighing platform calibration, the invention provides the portable calibration method for the weighing platform rail weighing unit, which has the advantages of convenient movement, high calibration efficiency and accurate pressure accuracy grade to 0.1 grade.
Meanwhile, the invention also provides a portable hydraulic force measuring device for weighing unit calibration of the weighing platform, which can realize the calibration method.
The technical scheme adopted by the invention is as follows:
a method of measuring force for rail weighing cell verification, comprising the steps of:
(1) the movable frame is pushed to the calibration position of the weighing unit 10 to be tested, the buckle plate auxiliary unit is locked to be buckled on the rails 13 on the two sides of the weighing unit 10, and the loading unit is used for loading the weighing unit 10 to be tested;
(2) the method comprises the steps that the pressure loaded by a loading unit to-be-detected weighing unit 10 is detected and serves as standard pressure data, the standard pressure data is transmitted to a master control unit, the master control unit receives the data and then compares the data with actual data of the to-be-detected weighing unit 10 displayed by a weighing instrument of a weighing platform, the detection error of the to-be-detected weighing unit 10 is determined, the detection of the weighing unit 10 is completed, and the detection error is determined;
(3) after one weighing unit 10 is verified, the pinch plate auxiliary unit is loosened to be separated from the track 13, the weighing unit 10 to be detected is moved to the next weighing unit 10 to be detected, and the steps (1) and (2) are repeated until all weighing units 10 on the two sides of the weighing platform are verified;
(4) after the verification errors of all the weighing units 10 of the weighing platform are determined, the verification errors of all the weighing units 10 are accumulated, and then the accumulated errors of the weighing platform can be calculated.
Further limiting, the detection error is accurate to 0.1 level, the detection result is more accurate, and continuous detection can be realized.
A portable hydraulic force measuring device for weighing unit calibration of a weighing platform, which can realize the calibration method, comprises a movable frame, and a pinch plate auxiliary unit, a loading unit, a pressure sensor 12, a display screen and data transmission unit 4 and a master control machine which are arranged on the movable frame;
the movable rack comprises a cross beam 3, a side beam 2 and a movable roller 1; the side beams 2 are arranged at two ends of the cross beam 3; the movable roller 1 is arranged at the bottom of the side beam 2;
the buckle plate auxiliary unit is arranged below the cross beam 3 of the movable rack, is positioned on the inner side of the side beam 2 and is used for being matched with the loading unit to play a role in supporting and reacting force during loading;
the loading unit is arranged on the beam 3 of the movable rack and used for loading and unloading the weighing unit 10 to be detected;
the pressure sensor 12 is arranged at the loading end of the loading unit, is connected with the display screen and data transmission unit 4 through a data line, and is used for detecting the loading pressure of the loading unit and transmitting pressure data to the display screen and data transmission unit 4;
the display screen and data transmission unit 4 is communicated with the master controller in a data line or wireless transmission mode; the master controller sends a loading command to the loading unit for loading or unloading, receives the calibration standard pressure data transmitted by the display screen and the data transmission unit 4, compares the calibration standard pressure data with the actual data of the unit to be weighed 10 displayed by the weighing instrument of the weighing platform, and determines the calibration error of the unit to be weighed 10.
Further limiting, the buckle plate auxiliary unit comprises a buckle plate mounting frame 6, a buckle plate 9, a rotating pin 7 and a positioning pin 8; the buckle mounting frame 6 is arranged on the beam 3 of the movable rack and can move along the beam 3; the buckle 9 sets up the lower extreme at buckle mounting bracket 6 and connects through swivel pin axle 7 to can rotate along swivel pin axle 7, location round pin axle 8 sets up fixes buckle 9 on buckle mounting bracket 6 in the upper end of buckle 9, holds the track tightly through buckle auxiliary unit, in order to prevent stress dispersion during the loading, provides the loading support to portable frame moreover.
Further inject, crossbeam 3 of portable frame adopts the I shape structure, and the top of buckle mounting bracket 6 is the T type groove structure with crossbeam 3 structural adaptation, guarantees that buckle mounting bracket 6 can move on crossbeam 3 of portable frame, applicable in the examination of the platform of weighing of different length specifications.
Further inject, buckle 9 includes first buckle and second buckle, and the upper end of first buckle and second buckle is connected with buckle mounting bracket 6 through swivel pin 7 respectively, and the lower extreme symmetry card is held the track at the track waist of weighing unit 10 tightly.
Further inject, the loading unit includes pneumatic cylinder 5 and briquetting 11, pneumatic cylinder 5 sets up in the middle part of the crossbeam 3 of portable frame and is connected with hydraulic workstation through hydraulic pressure oil pipe, through wire or wireless transmission mode and the communication of master controller, briquetting 11 is fixed on waiting of weighing platform and is waited weighing unit 10 to with pneumatic cylinder 5's telescopic link end just right, guarantee that the atress axis is perpendicular with the bearing rail face.
Compared with the prior art, the portable detection method for the weighing unit of the weighing platform mainly has the following advantages:
(1) according to the invention, after one weighing unit 10 of the weighing platform is calibrated, the force measuring device is moved to the other weighing unit 10 for calibration, each weighing unit 10 is independently calibrated, error correction can be independently and specifically corrected, and the accuracy of the weighing unit is improved.
(2) The invention can utilize the loading unit to continuously pressurize step by step, accurately generate pressure, automatically read and record data, reduce human errors, achieve the accuracy grade of 0.1 grade, and overcome the problems of large errors and limited loading value quantity in the weight calibration method in the prior art.
(3) The force measuring device is convenient to move, simple to assemble and disassemble, simple and convenient to operate, flexible and portable, solves the problems that weights need to be hoisted and are difficult to carry in a weight calibration method in the prior art, and greatly improves the calibration efficiency of the weighing platform.
(4) According to the invention, the mounting rack is moved along the cross beam, so that weighing units with different lengths can be verified, and the maximum verification length of the weighing unit is 1752 mm.
(5) The invention can test the weighing units of steel rails with different specifications by selecting the specifications of the movable roller 1, the pinch plate 9 and the pressing block 11, and has wider test application range.
Drawings
FIG. 1 is a schematic view of a force measuring device of the present invention.
Fig. 2 and 3 are main structural sectional views of the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, the portable force measuring device for rail weighing unit calibration of the present invention comprises a mobile frame, and a pinch plate auxiliary unit, a loading unit, a pressure sensor 12, a display screen and data transmission unit 4 and a general control machine which are mounted on the mobile frame, wherein:
the movable rack comprises a cross beam 3, a side beam 2 and a movable roller 1; the side beams 2 are arranged at two ends of the cross beam 3; the movable roller 1 is arranged at the bottom of the side beam 2, and the movable roller 1 is placed on the rail 13 during verification, so that the whole device can move conveniently.
The buckle plate auxiliary unit is arranged below the cross beam 3 of the movable rack, is positioned on the inner side of the side beam 2 and is used for being matched with the loading unit to play a role in supporting and reacting force during loading; the pinch plate auxiliary unit comprises a pinch plate mounting frame 6, a pinch plate 9, a rotating pin 7 and a positioning pin 8; the buckle mounting frame 6 is arranged on the beam 3 of the movable rack and can move along the beam 3; the pinch plate 9 is arranged at the lower end of the pinch plate mounting frame 6 and connected through a rotating pin 7, the pinch plate can rotate along the rotating pin 7, and the positioning pin 8 is arranged at the upper end of the pinch plate 9 to fix the pinch plate 9 on the pinch plate mounting frame 6.
The loading unit is arranged on the beam 3 of the movable rack and used for loading and unloading the weighing unit 10 to be detected; the loading or unloading can be performed using a hydraulic cylinder 5 connected to a hydraulic work station, and the accuracy of the applied pressure can be accurate to the order of 0.1. In order to ensure that the pressure applied to the weighing unit 10 by the hydraulic cylinder 5 can be uniformly distributed, a matched pressing block 11 is arranged in the middle of the upper surface of the weighing unit 10 right below the telescopic rod of the hydraulic cylinder 5, and the pressing block 11 is of an inverted U-shaped clamping groove structure and is inverted on a track of the weighing unit 10 to balance the load of the hydraulic cylinder 5 and avoid uneven distribution of loading force.
The pressure sensor 12 is arranged at the loading end of the loading unit, namely the tail end of the telescopic rod of the hydraulic cylinder 5, is connected with the display screen and data transmission unit 4 through a wire, and is used for detecting the loading pressure of the loading unit and transmitting pressure data to the display screen and data transmission unit 4;
the display screen and the data transmission unit 4 are respectively connected with the loading unit and the pressure sensor 12 and are communicated with the master controller in a data line or wireless communication mode, the master controller sends a loading command to the loading unit to load or unload, receives the calibration standard pressure data transmitted by the pressure sensor 12, compares the calibration standard pressure data with the actual data of the weighing unit 10 to be calibrated displayed by the weighing instrument of the weighing platform, determines the calibration error of the weighing unit 10 to be calibrated, and the master controller realizes data acquisition, analysis and processing, can visually display pressure and displacement data on the display screen and the data transmission unit 4 according to the processing result, and draws a curve to store data.
The portable hydraulic force measuring device for calibrating the weighing unit of the weighing platform is used for calibrating the rail weighing unit, and the specific method is realized by the following steps:
(1) the movable frame is pushed to the calibration position of the weighing unit 10 to be tested, the buckle plate auxiliary unit is locked to be buckled on the rails 13 on the two sides of the weighing unit 10, and the loading unit is used for loading the weighing unit 10 to be tested;
(2) the pressure loaded by the weighing unit 10 to be detected by the loading unit is detected as standard pressure data and is transmitted to the master control unit, the master control unit receives the data and then compares the data with actual data of the weighing unit 10 to be detected displayed by a weighing instrument of the weighing platform, the detection error of the weighing unit 10 to be detected is determined, and the detection of the weighing unit 10 is completed;
the specific calculation method is as follows:
in the formula: fiThe indicated value of the verification pressure displayed by the instrument of the weighing unit 10 of the weighing platform is kg;
q-value error of a weighing unit, wherein the unit is kg;
(3) after one weighing unit 10 is verified, the pinch plate auxiliary unit is loosened to be separated from the track 13, the weighing unit 10 to be detected is moved to the next weighing unit 10 to be detected, and the steps (1) and (2) are repeated until all weighing units 10 on the two sides of the weighing platform are verified;
(4) after the verification errors of all the weighing units 10 of the weighing platform are determined, the verification errors of all the weighing units 10 are accumulated, and then the accumulated errors of the weighing platform can be calculated;
the accumulated error of the weighing platform is calculated according to the formula (2):
in the formula:all-purpose-weighing station error in units of kg;
k-the total number of weighing cells, k being 6 in this example;
qi-ith weighing cell error in kg;
i- -is 1, 2, 3 … … k.
Example 1
The portable hydraulic force measuring device for detecting the weighing unit of the weighing platform is suitable for the weighing unit 10 with a 50kg/m steel rail as the weighing rail. Crossbeam 3 of the portable frame of this embodiment adopts the I-steel structure, the T type groove structure with crossbeam 3 structure adaptation is adopted at the top of corresponding buckle mounting bracket 6, buckle 9 includes first buckle and the second buckle of symmetric distribution in the track of weighing unit 10 inside and outside, the upper end of first buckle and second buckle is connected with buckle mounting bracket 6 through swivel pin 7 respectively, and can rotate to orbital both sides along swivel pin 7, still install locating pin 8 in swivel pin 7's below, it is fixed with buckle 9 through two point location of locating pin 8 and swivel pin 7 cooperation. The lower ends of the first buckle plate and the second buckle plate are bent and symmetrically clamped at the waist of the track of the weighing unit 10 to hold the track tightly, so that the track is locked on the track 13. The pressing block 11 of the embodiment adopts the specification of a 50kg/m steel rail, the pressure sensor 12 is connected with the display screen and the data transmission unit 4 through a data line, and the pressure data is displayed and transmitted to the master control machine through the display screen and the data transmission unit 4. The hydraulic cylinder 5 is fixed in the middle of the cross beam 3 of the movable rack and connected with the hydraulic workstation through a hydraulic oil pipe, and the hydraulic cylinder 5 is also connected with the master controller through a wire to receive a control command of the master controller.
The weighing platform of the embodiment is provided with 6 weighing units 10, the portable hydraulic force measuring device for calibrating the weighing units of the weighing platform is used as a standard device, and the weighing platform is calibrated, and the specific method is realized by the following steps:
(1) the movable rack is pushed to the verification position of a unit 10 to be detected and weighed, a first buckle plate and a second buckle plate of the buckle plate 9 are fixed by a positioning pin shaft 8, so that the rails of the unit 10 to be detected and weighed are locked in an embracing mode, the movable rack and the buckle plate 9 are pre-tensioned by utilizing a hydraulic cylinder to carry out slow loading, the stability of a stress point is ensured, and a stress axis is vertical to a bearing rail surface and is zeroed;
(2) the hydraulic cylinder is loaded step by step, the pressure sensor 12 collects loading force, data are read when the stress of the detection point reaches the maximum value and is kept stable, the data are used as standard pressure data and are transmitted to the master control unit, the master control unit receives the data and then compares the data with actual data of the weighing unit 10 to be detected displayed by a weighing instrument of the weighing platform, the detection error of the weighing unit 10 to be detected is determined, 3 times of measurement is carried out repeatedly, and the detection of the weighing unit 10 is completed.
(3) After one weighing unit 10 is verified, the pinch plate auxiliary unit is loosened to be separated from the track 13, the weighing unit 10 to be detected is moved to the next weighing unit 10 to be detected, and the steps (1) and (2) are repeated until all weighing units 10 on the two sides of the weighing platform are verified;
(4) after the verification errors of all the weighing units 10 of the weighing platform are determined, the verification errors of all the weighing units 10 are accumulated, and then the accumulated errors of the weighing platform can be calculated;
example 2
The portable hydraulic force measuring device for the weighing unit verification of the weighing platform is suitable for the rails 13 of 60kg/m steel rails. The crossbeam 3 of the portable frame of this embodiment adopts the I-steel structure, and the top of corresponding buckle mounting bracket 6 adopts the T type groove structure with crossbeam 3 structure adaptation, and the upper portion of buckle 9 is fixed on buckle mounting bracket 6 through 2 rotatory round pin axles 7 that set up side by side. The lower part of the pinch plate 9 tightly embraces the track 13 and can be fastened and locked on the track 13 by arranging 2 positioning pin shafts 8 in parallel. The pressing block 11 of this embodiment adopts the specification of 60kg/m type rail, and the pneumatic cylinder 5 is fixed in the middle part of the crossbeam 3 of portable frame and is connected with hydraulic workstation through hydraulic pressure oil pipe, and the pneumatic cylinder 5 passes through wireless transmission mode and the communication of master control machine, receives the control command of master control machine.
The invention can be adapted to other types of weighing rails by changing the size of the connecting piece matched with the steel rail, thereby being applicable to the detection of weighing units of various types of weighing tables and not limited to the embodiment.
Claims (4)
1. The utility model provides a portable hydraulic pressure measuring force device for track weighing cell examination which characterized in that: the device comprises a movable rack, and a buckle plate auxiliary unit, a loading unit, a pressure sensor (12), a display screen and data transmission unit (4) and a general control machine which are arranged on the movable rack;
the movable rack comprises a cross beam (3), a side beam (2) and a movable roller (1); the side beams (2) are arranged at two ends of the cross beam (3); the movable roller (1) is arranged at the bottom of the side beam (2); the cross beam (3) of the movable rack is of an I-shaped structure;
the buckle plate auxiliary unit is used for being matched with the loading unit to play a role in supporting and reacting during loading; the buckle plate auxiliary unit comprises a buckle plate mounting frame (6), a buckle plate (9), a rotating pin shaft (7) and a positioning pin shaft (8); the buckle mounting rack (6) is arranged on a cross beam (3) of the movable rack and can move along the cross beam (3); the buckle plate (9) is arranged at the lower end of the buckle plate mounting frame (6), connected through a rotating pin shaft (7) and capable of rotating along the rotating pin shaft (7), and the positioning pin shaft (8) is arranged at the upper end of the buckle plate (9) to fix the buckle plate (9) on the buckle plate mounting frame (6); the top of the buckle plate mounting frame (6) is of a T-shaped groove structure matched with the structure of the cross beam (3); the buckle plate (9) comprises a first buckle plate and a second buckle plate, the upper ends of the first buckle plate and the second buckle plate are respectively connected with the buckle plate mounting frame (6) through a rotating pin shaft (7), and the lower ends of the first buckle plate and the second buckle plate are symmetrically clamped at the rail waist part of the weighing unit (10) to hold the rail tightly; the loading unit is arranged on a cross beam (3) of the movable rack and used for loading and unloading the unit to be weighed (10);
the pressure sensor (12) is arranged at the loading end of the loading unit, is connected with the display screen and the data transmission unit (4) through a data line, and is used for detecting the loading pressure of the loading unit and transmitting pressure data to the display screen and the data transmission unit (4);
the display screen and data transmission unit (4) is communicated with the master controller in a data line or wireless transmission mode; the master controller sends a loading command to the loading unit to load or unload, receives the verification standard pressure data transmitted by the display screen and the data transmission unit (4), compares the verification standard pressure data with the actual data of the unit to be weighed (10) displayed by the weighing instrument of the weighing platform, and determines the verification error of the unit to be weighed (10).
2. The portable hydraulic force-measuring device for rail weighing cell certification according to claim 1, wherein: the loading unit comprises a hydraulic cylinder (5) and a pressing block (11), the hydraulic cylinder (5) is arranged in the middle of a cross beam (3) of the movable rack and is connected with a hydraulic workstation through a hydraulic oil pipe and communicated with a master controller through a wire or a wireless transmission mode, and the pressing block (11) is fixed on a weighing unit (10) to be weighed of the weighing platform and is right opposite to the tail end of a telescopic rod of the hydraulic cylinder (5).
3. A method for measuring force for rail weighing cell verification, which is implemented based on the portable hydraulic force-measuring device for rail weighing cell verification according to claim 1 or 2, the method comprising the steps of:
(1) the movable rack is pushed to the verification position of a weighing unit (10) to be detected, a buckle plate auxiliary unit is locked, a first buckle plate and a second buckle plate of a buckle plate (9) are fixed by a positioning pin shaft (8) of the buckle plate auxiliary unit, so that rails (13) on two sides of the weighing unit (10) to be detected are clasped and locked by the first buckle plate and the second buckle plate, the weighing unit (10) to be detected is loaded by a loading unit, the movable rack and the buckle plate (9) are pre-tensioned, the stress point is ensured to be stable, the stress axis is perpendicular to the bearing rail surface, and zero setting is carried out;
(2) detecting the pressure loaded by the loading unit on the weighing unit (10) to be detected, reading data as standard pressure data after the stress of a detection point reaches the maximum value and keeps stable, transmitting the standard pressure data to the master control unit, comparing the data received by the master control unit with actual data of the weighing unit (10) to be detected displayed by a weighing instrument of the weighing platform, determining the detection error of the weighing unit (10) to be detected, completing the detection of the weighing unit (10), and determining the detection error q;
the specific calculation method is as follows:
in the formula: fi-a calibration pressure indication in kg, displayed by the weighing unit (10) of the weighing station, in meters;
q-weighing unit calibration error, unit is kg;
(3) after one weighing unit (10) is verified, the pinch plate auxiliary unit is loosened to be separated from the rail (13), the weighing unit is moved to a next weighing unit (10) to be detected, and the steps (1) and (2) are repeated until all weighing units (10) on two sides of the weighing platform are verified;
(4) after the verification errors of all weighing units (10) of the weighing platform are determined, the verification errors of all weighing units (10) are accumulated, and then the accumulated errors of the weighing platform can be calculated;
in the formula:all-purpose-weighing station error in units of kg;
k- -the total number of weighing cells;
qi-verification error of the ith weighing cell in kg;
i- -is 1, 2, 3 … … k.
4. The method of claim 3, wherein the certification error is accurate to a level of 0.1.
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| CN201811313435.6A CN109341837B (en) | 2018-11-06 | 2018-11-06 | Force measuring method for rail weighing unit verification and portable hydraulic force measuring device |
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| CN201811313435.6A CN109341837B (en) | 2018-11-06 | 2018-11-06 | Force measuring method for rail weighing unit verification and portable hydraulic force measuring device |
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| CN2844866Y (en) * | 2005-10-11 | 2006-12-06 | 济南钢铁股份有限公司 | Calibrating system for super large railway scales |
| CN102564559B (en) * | 2012-03-07 | 2013-12-04 | 中国计量学院 | Hydraulic dynamic calibrating device for verifying rail weigher |
| CN102661778A (en) * | 2012-05-31 | 2012-09-12 | 济南金钟电子衡器股份有限公司 | Vehicle weighing platform inspection device |
| CN103033250A (en) * | 2012-12-14 | 2013-04-10 | 中国铁道科学研究院 | Unbalance loading standard calibrating device of weigh bridge test car |
| CN104931123B (en) * | 2015-06-10 | 2017-11-17 | 北京华横新技术开发公司 | Broken rail track scale inspection device |
| CN206832353U (en) * | 2017-04-27 | 2018-01-02 | 重庆昌冉科技有限公司 | A kind of broken rail track scale inspection device |
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