CN109263615B - Horizontal lifting internet of things weighing method of truck-mounted static internet of things weighing device of freight car - Google Patents
Horizontal lifting internet of things weighing method of truck-mounted static internet of things weighing device of freight car Download PDFInfo
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- CN109263615B CN109263615B CN201811084499.3A CN201811084499A CN109263615B CN 109263615 B CN109263615 B CN 109263615B CN 201811084499 A CN201811084499 A CN 201811084499A CN 109263615 B CN109263615 B CN 109263615B
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- 238000005303 weighing Methods 0.000 title claims abstract description 101
- 230000003068 static effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000012937 correction Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 5
- 238000012163 sequencing technique Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000006855 networking Effects 0.000 claims 2
- 239000004568 cement Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
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- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
- G01G19/083—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles lift truck scale
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Abstract
The vehicle-mounted static internet of things weighing device for the freight car comprises a lifting weighing mechanism (10), wherein the lifting weighing mechanism (10) comprises at least n lifting cylinders (11), and n is a positive integer greater than or equal to 3; the lifting oil cylinder (11) is fixed on the supporting cross beam (17) through the base (12), the supporting cross beam (17) is fixed on the longitudinal beam (13), and a pressure sensor (31) is arranged at the top of a lifting piston of the lifting oil cylinder (11); the horizontal adjusting mechanism (20), the horizontal adjusting mechanism (20) comprises a communicating vessel (21), the communicating vessel (21) comprises side branch water column pipes (23) which are communicated with each other and correspond to the number of the lifting cylinders, and the side branch water column pipes (23) are fixed beside the lifting cylinders (11); a floater (26) is arranged on the liquid level of the side branch water column pipe (23), and a phase laser sensor (32) is arranged at the top of the floater (26); according to the truck-mounted static internet-of-things weighing device of the freight car, the carrying capacity can be accurately measured only by lifting once, the weighing precision is less than 250g, and the weighing accuracy and the weighing efficiency are improved.
Description
Technical Field
The invention relates to the technical field of freight vehicles, in particular to a horizontal lifting internet of things weighing method of a vehicle-mounted static internet of things weighing device of a freight vehicle.
Background
With the continuous expansion of the cargo transportation industry, measuring the actual load of cargo has been a major challenge for truck drivers and suppliers. While the weight of truck cargo can be weighed by wagon balance, this is certainly not possible for large trucks that go to rural or mountain areas to purchase agricultural products. For example, the bulk cement and the cement tank truck are filled with cement, only the ground balance is needed, and the place without the ground balance can only be judged according to the quantity of the driver. The vehicle-mounted metering of the cement tank truck is also a similar problem.
Thus, an on-board static weighing device is present. The vehicle-mounted static weighing device lifts a carriage or a cement tank and other carriers by a certain distance, such as 2mm, through four oil cylinders, pressure sensors are arranged at lifting contact points of the four oil cylinders, the pressure of the pressure sensors is detected, and the sum of the pressures is calculated, so that the load capacity can be known. This weight measurement has some inaccuracy because the chassis of the vehicle is not necessarily absolutely level when lifted. It is common practice to move the vehicle several times and the data processing unit calculates the average value of the weighing results of each time by displaying and storing them as the weight of the final load.
Therefore, although the development of the vehicle-mounted weighing system is a trend, the main problems of the current vehicle-mounted weighing technology are that the weighing data error is large (generally 10% -20%), the use stability is poor, and the popularization and the use of the vehicle-mounted weighing system are limited.
CN103303187a at Shanghai engineering university discloses a fast and accurate vehicle-mounted weighing system, which adjusts the carriage in an absolute horizontal plane through a cargo balance adjusting device 2 before accurate weighing. The cargo balance adjusting device 2 is actually an oil cylinder, three cargo balance adjusting devices are arranged at the left corner and the right corner of the bottom of the front end of the carriage, and the other cargo balance adjusting device is arranged at the middle position of the bottom of the rear end of the carriage, and the carriage is enabled to be horizontal by lifting the oil cylinder to the same height. The contact position of the oil cylinder and the bottom of the carriage is provided with a pressure sensor, and the pressure of the pressure sensor is converted into weight for display.
In addition, the internet of things is an important component of a new generation of information technology. The method is characterized in that any object to be monitored and interacted and generated information are combined with the Internet through various information sensing devices to form a huge network. The object is to realize the connection of objects, objects and people, and all objects and networks, thereby facilitating the identification and management. The weighing system can be integrated into the intelligent management system through the application of the Internet of things.
How to develop a static vehicle-mounted weighing device, the carrying capacity can be accurately measured only by lifting once, and the static vehicle-mounted weighing device becomes a common problem in industry development.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a truck-mounted static internet of things weighing device and a horizontal lifting weighing method for a freight car.
The invention aims at realizing the purpose that the vehicle-mounted static internet of things weighing device of the freight car is provided with a carriage which is arranged on a pair of car longitudinal beams on a replaceable bearing basis, and comprises
The lifting weighing mechanism comprises at least n lifting oil cylinders, and n is a positive integer greater than or equal to 3; the lifting cylinder is fixed on the supporting cross beam through the base, the supporting cross beam is fixed on the longitudinal beam, and a pressure sensor is arranged at the top of a lifting piston of the lifting cylinder;
the horizontal adjusting mechanism comprises a communicating vessel, wherein the communicating vessel comprises side branch water column pipes which are communicated with each other and correspond to the number of the lifting cylinders, and the side branch water column pipes are fixed beside the lifting cylinders; a floater is arranged on the liquid level of the side branch water column pipe, and a phase laser sensor is arranged at the top of the floater;
the control mechanism comprises a main chip, and the main chip is connected with the pressure sensor and the phase laser sensor through optical fiber data lines.
Further, the float is provided with a vertical positioning mechanism, the float has a maximum cross section with three endpoints; the vertical positioning mechanism comprises an upper tetrahedron and a lower tetrahedron, and the upper tetrahedron and the lower tetrahedron are integrally connected in a coplanar manner with the maximum cross section; the upper tetrahedron has an upper vertex, the lower tetrahedron has a lower vertex, the upper vertex to maximum cross-section has an upper vertical distance that is less than the lower vertex to maximum cross-section has a lower vertical distance.
Further, the maximum cross section is a regular triangle, the connection line of the upper peak and the lower peak is over the center of gravity of the maximum cross section, and the upper vertical distance H 1 And a lower vertical distance H 2 Satisfy H 2 ≥2H 1 。
Further, the upper apex of the float is mounted with the phase laser sensor, the emitted laser beam of which is perpendicular to the maximum cross section.
Further, three vertex positions of the maximum cross section extend outwards to form a cross rod along the maximum cross section respectively, the emitted laser beam of the calibration phase laser sensor is perpendicular to the plane of the end point of the cross rod (28), and then the circle center of the positioning floating ball is fixedly arranged at the end point of the cross rod.
Further, the supporting beam comprises a dovetail groove positioning part, the base is provided with a positioning taper hole, the bottom of the base is provided with a conical positioning table, the verticality between the rotating axis of the positioning taper hole and the bottom surface of the conical positioning table is less than 0.02mm, and the conical positioning table is matched and pressed in the dovetail groove positioning part.
Further, a lifting piston is arranged in the lifting oil cylinder and comprises a ball head, a ball head support is rotatably fixed on the ball head, and a cylindrical protruding part of the ball head support extends into a blind hole of the box body; the pressure sensor is arranged at the top of the ball head support.
Further, colored liquid is arranged in the communicating vessel, an air port and an automatic cap screwing are arranged at the top end of the side branch water column pipe, the automatic cap screwing can receive instructions of the control mechanism to enable the side motor to start, the automatic cap screwing is driven to rotate through the gear transmission mechanism, the air port is leaked, and meanwhile the top cover is screwed aside.
Further, the device also comprises a limit inclination mechanism, the limit inclination mechanism comprises limit inclination rods and limit inclination sleeves, the limit inclination rods are arranged at the bottoms of four corners of a carriage, the limit inclination sleeves are fixed on longitudinal beams through transverse plates, the limit inclination rods penetrate through inner holes of the limit inclination sleeves, adjusting nuts are arranged at the tops of the limit inclination rods, the distance between the adjusting nuts and the bottom of the limit inclination sleeves is equal to the lifting maximum stroke H, and meanwhile the limit inclination angles of weighing vehicles are determined when the limit inclination rods are inclined to touch the inner holes of the limit inclination sleeves when being lifted to H/2.
A horizontal lifting weighing method of a truck-mounted static internet of things weighing device of a freight car,
1) Judging whether weighing and lifting are safe or not, wherein an inclination sensor is arranged in the center position of the geometric dimension of the bottom of the carriage, a control mechanism starts the inclination sensor to detect the actual inclination angle beta of the automobile, meanwhile, judging that beta is more than or equal to alpha, and if so, displaying that the automobile is too inclined by a display to influence the weighing and lifting safety; if β < α, then step 2) is performed;
2) Locating horizontal reference Z 0 The automobile is parked, the automobile engine is flameout and the storage battery supplies power, the liquid level in the side branch water column pipe of the communicating vessel is even in an inclined stateHaving an absolute level pi, which allows the phase laser sensors on top of each float floating on the liquid surface to be also located absolutely at the same level reference Z 0 And the laser beam emitted by the phase laser sensor is also absolutely perpendicular to the horizontal plane pi;
3) Measuring initial distance SH of each supporting point pi Laser is emitted to the bottom of the carriage to return to obtain the ranging result, and the same level reference Z is obtained 0 And under the precondition of emitting laser vertically, the initial distance SH of the tank bottom at the position of the side branch water column pipe is measured respectively pi Wherein i=a positive integer from 1 to n, and n is the number of lifting cylinders.
4) Lifting judgment, calculating lifting stroke L Lifting device Sequentially taking the horizontal lifting distanceWherein H is the maximum lifting stroke; calculating the horizontal lifting stroke L Lifting device ＝
SH pi +H P Judging if L Lifting device ≤L Limiting the limit Then enter the next step; if L Lifting device ≥L Limiting the limit Re-executing step 4), taking the next number until the next step is entered; if getL Lifting device ≥L Limiting the limit The error reporting is terminated;
5) Lifting execution, starting each lifting oil cylinder according to the lifting stroke L Lifting device Executing;
6) Verifying the level, and measuring the final distance EH between each supporting point after lifting execution is completed pi Starting a phase laser sensor to respectively measure the final distance EH between the bottoms of the side branch water column pipe positions pi Wherein i=a positive integer from 1 to n, n being the number of lifting cylinders; sequencing from small to large, taking the minimum value, descending the piston of the lifting cylinder of the other lifting cylinders, testing the distance at intervals t, and calculating the difference delta until the difference delta is zero, thereby completing the verification level. If all are equal, the verification level is completed;
7) Weighing and returning to the n lifting cylindersCalculating the pressure sum of the pressure values of the pressure sensors at the top to obtain weighing pressure P, wherein the unit is N and Newton, and obtaining the payloadUnit kg, weight of whole vehicle G Vehicle 1 ＝G Load carrier +G Vehicle 0 Wherein G is Vehicle 0 For the weight of the freight car, the control mechanism 30 will control G Load carrier 、G Vehicle 1 And sending the display to a display part for display.
According to the truck-mounted static internet-of-things weighing device of the freight car, the horizontal reference is determined by the horizontal adjusting mechanism, the load in the carriage of the freight car is accurately weighed through the cooperative cooperation of the horizontal reference and the lifting weighing mechanism, the weighing precision is less than 250g, and the weighing accuracy is greatly improved.
Drawings
Fig. 1 is a front cross-sectional view of a truck-mounted static internet of things weighing device for a freight car. Fig. 2 is a state diagram before the horizontal lifting of the inclined state of the on-board static internet of things weighing device of the freight car. Fig. 3 is a state diagram of a cargo truck on-board static internet of things weighing device after the tilt state is lifted horizontally.
Fig. 4 is a front view of a float of a truck-mounted static internet of things weighing device of the invention.
Fig. 5 is a top view of a float of a truck-mounted static internet of things weighing device of the invention.
Fig. 6 is a front cross-sectional view of a tilt-limiting mechanism of a truck-mounted static internet of things weighing device of the invention.
Fig. 7 is a schematic diagram of a weighing vehicle limiting inclination angle of a limiting inclination mechanism of a truck-mounted static internet of things weighing device of the invention. Reference numerals in the above figures:
10 lifting weighing mechanism, 11 lifting oil cylinder, 12 base, 13 longitudinal beam, 14 base body, 15 cantilever fastening part, 16 lifting piston, 17 supporting beam, 18 positioning taper hole and 19 conical positioning table
20 horizontal adjusting mechanism, 21 communicating vessel, 22 central water column, 23 side branch water column, 24 air port, 25 automatic screw cap, 26 float, 27 positioning float, 28 cross bar
30 control mechanism, 31 pressure sensor, 32 phase laser sensor, 33 inclination sensor, 34 touch
Pressure sensor
40 limit mechanism, 41 limit rod, 42 limit cover, 43 adjusting nut
50 vertical positioning mechanism, 51 upper tetrahedron, 52 lower tetrahedron, 53 upper vertex, 54 lower vertex
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings, which are not intended to limit the scope of the invention.
As shown in the figure, the vehicle-mounted static internet of things weighing device of the freight car comprises a lifting weighing mechanism 10, a horizontal adjusting mechanism 20 and a control mechanism 30, wherein the lifting weighing mechanism 10 comprises at least 3 lifting cylinders 11, the lifting cylinders 11 are fixed on a supporting cross beam 17 through a base 12, and the supporting cross beam 17 is fixed on a longitudinal beam 13 of the freight car.
The supporting cross beam 17 comprises a body part 17.1, a fixing part 17.2 and a dovetail groove positioning part 17.3, and the supporting cross beam 17 is fixedly connected between the two longitudinal beams 13 through the fixing part 17.2. The base 12 is fixedly connected above the fixing part 17.2, the base 12 comprises a base body 14 and a fastening part 15, the base body 14 is provided with a positioning taper hole 18, and the bottom of the base body 14 is provided with a conical positioning table 19. The bottom of the base body 14 is pressed in the dovetail groove positioning part 17.3 in a matched manner through a conical positioning table to obtain the perpendicularity positioning of the lifting piston axis relative to the bottom surface of the dovetail groove positioning part, the perpendicularity is smaller than 0.05mm, and the conical positioning table 19 enables the perpendicularity of the cantilever fastening part 15 not to be influenced when the cantilever fastening part is fastened through bolts. The lift cylinder 11 housing is provided with a cone 11.1, which cone 11.1 is positioned in a positioning cone hole 18 of the base 12. The lifting piston 16 comprises a ball head 16.1, and a ball head support 16.2 is fastened to the ball head 16.1. The ball bearing 16.2 protrudes into the blind hole 2 of the freight car body 1. The top of the ball bearing 16.2 of the lifting piston 16 is provided with a pressure sensor 31. The lifting weighing mechanism 10 has two working states, namely an idle state and a lifting weighing state, wherein in the idle state, the lifting piston is retracted to the limit, and the ball head support is at a certain distance from the bottom of the blind hole; in the lifting weighing state, the lifting piston extends out, the ball head support props against the bottom of the blind hole, the freight car box 1 is lifted horizontally, and the control mechanism 30 reads the pressure of the pressure sensor 31 to obtain the car carrying capacity.
The horizontal adjusting mechanism 20 comprises a communicating vessel 21, wherein the communicating vessel 21 comprises side branch water column pipes 23 which are communicated with each other and correspond to the number of lifting cylinders, and the side branch water column pipes 23 are fixed beside the lifting cylinders 11; the fluid 22 is arranged in the communicating vessel 21, the top end of the side branch water column tube 23 is provided with an air port 24 and an automatic cap screwing 25, the automatic cap screwing 25 is rotated by receiving an instruction of the control mechanism 30 in a lifting weighing state, the air port 24 is leaked, and meanwhile, the top is opened. A float 26 is arranged on the liquid level of the side branch water column pipe 23.
The float 26 is provided with a vertical positioning mechanism 50, the float 26 has a maximum cross section 26.1, the maximum cross section is in a regular triangle shape, the maximum cross section has three endpoints, the vertical positioning mechanism 50 comprises an upper tetrahedron 51 and a lower tetrahedron 52, and the upper tetrahedron 51 and the lower tetrahedron 52 are integrally connected in a coplanar manner with the maximum cross section 26.1. The upper tetrahedron 51 has an upper vertex 53 and the lower tetrahedron 52 has a lower vertex 54, the centers of gravity of the upper vertex 53 and the lower vertex 54 continuing through the maximum cross section.
A perpendicular to the maximum cross-section is made along the center of gravity of the regular triangle, with two points on the perpendicular, the upper vertex 53 being located a distance H above the maximum cross-section 1 The lower vertex is located at a distance H below the maximum cross section 2 ，H 2 ≥2H 1 . The three end points of the maximum cross section form an upper tetrahedron 51 and a lower tetrahedron 52 with the upper and lower points, respectively. The centre of gravity of the float 26 is below the maximum cross section so the upper tetrahedron 51 always faces directly above. A phase laser sensor 32 is provided at the vertex position on the upper tetrahedron 51. The three vertex positions of the maximum cross section extend outwards along the maximum cross section to form a cross rod 28 respectively, the circle center of the positioning floating ball 27 is arranged at the end point of the cross rod 28, the positioning floating ball 27 can ensure that the phase laser sensor 32 is approximately positioned at the center of the water column, and meanwhile, before use, whether the laser emitted by the phase laser sensor 32 is vertical to the plane where the positioning floating ball 27 is positioned or not can be calibrated.
The control mechanism 30 comprises a main chip, the main chip is connected with a pressure sensor 31, a phase laser sensor 32, an inclination sensor 33 and a touch pressure sensor 34 through optical fiber data lines, and the main chip comprises a storage module and a weight conversion module.
The device further comprises a limit-tilt mechanism 40, wherein the limit-tilt mechanism 40 comprises limit-tilt rods 41 and limit-tilt sleeves 42, the limit-tilt rods 41 are arranged at the bottom of the four corners of the freight car box 1, and the limit-tilt sleeves 42 are fixed on the longitudinal beams 13 through transverse plates. The limit tilt rod 41 passes through the inner hole of the limit tilt sleeve 42, the top end of the limit tilt rod 41 is provided with an adjusting nut 43, the lifting limit H of the limit tilt rod 41 in the limit tilt sleeve 42 can be adjusted by rotating the adjusting nut 43, and the lifting limit H can be marked on the limit tilt rod 41 and is a readable scale. The limit mechanism 40 determines the lift limit H and also determines the weighing vehicle limit tilt angle α. On an absolute horizontal bottom surface, the tilt limiting bar 41 is lifted almost vertically without affecting the weighing scale. When the floor on which the car is parked is not absolutely level, assuming that the freight car body is tilted 5 ° to the left, the tilt sensor 33 detects that the tilt does not exceed the threshold value, so that no weighing alarm is sent to the control mechanism 30, i.e. the tilt is safe for horizontal lifting, after which the left tilt limit lever is rotated 5 ° relative to the plumb line. The rod part of the tilting-limiting rod 41 is provided with a plurality of touch sensors 34 at intervals, when the tilting-limiting rod 41 touches the inner hole of the tilting-limiting sleeve 42, the touch sensors 34 send out a weighing failure signal to the control mechanism 30, the control mechanism 30 commands the lifting piston 16 of the lifting cylinder 11 to retract to the limit, the lifting state returns to the idle state, and the freight car body 1 is supported by the lifting cylinder 11 to be supported by the freight car longitudinal beam 13. The angle that causes the touch sensor 34 to touch the inner bore of the tilt-limiting sleeve is the heavy vehicle limit tilt angle α. The limiting angle of inclination alpha is typically 5 deg. -10 deg.. The inclination sensor 33 is arranged in the center of the geometric dimension of the bottom of the carriage 1, the actual inclination angle beta of the automobile can be detected before weighing by the inclination sensor 33, information is sent to the control mechanism, the control mechanism 30 judges that beta is more than or equal to alpha, and if the beta is more than or equal to alpha, the display displays that the automobile is too inclined, so that the weighing lifting safety is affected.
In the inclined state, the horizontal adjusting mechanism 20 can be used as a measurement reference for horizontal lifting, and is matched with the lifting weighing mechanism 10 to finish the horizontal lifting work together, so that the weighing accuracy is ensured. The method specifically comprises the following steps:
1) Judging whether the weighing and lifting are safe or not, detecting the actual inclination angle beta of the automobile before weighing by the inclination angle sensor 33, sending information to the control mechanism, judging that beta is more than or equal to alpha by the control mechanism 30, and if so, displaying that the automobile is too inclined by the display to influence the weighing and lifting safety; if β < α, then step 2) is performed;
2) Positioning ranging horizontal reference Z 0 In order to prevent the shaking of the automobile engine, the automobile engine is in a flameout state and the storage battery is in a power supply state. The liquid level in the side branch water column 23 of the communicating vessel 21 has an absolute level pi even in an inclined state, which makes the phase laser sensor 32 at the top of each float 26 floating on the liquid level to be absolutely on the same level reference Z 0 And the laser light emitted by the phase laser sensor 32 is also absolutely perpendicular to the horizontal plane pi.
3) Measuring initial distance SH of each supporting point pi Laser is emitted to the bottom of the freight car box 1 to return to obtain the ranging result, and the laser is at the same level reference Z 0 And under the premise of emitting laser vertically, the initial distance SH of the tank bottom at the position of the side branch water column pipe 23 is measured respectively pi Wherein i=1-n is a positive integer, n is the number of lift cylinders, if n=4, SH is obtained P1 、SH P2 、SH P3 And SH P4 。
4) Lifting judgment, calculating lifting stroke L Lifting device Sequentially taking the horizontal lifting distanceWherein H is the maximum lifting stroke; calculating the horizontal lifting stroke L Lifting device ＝SH pi +H P Judging if L Lifting device ≤L Limiting the limit Then enter the next step; if L Lifting device ≥L Limiting the limit Step 3) is then re-executed, taking the number down, i.e. +.>Calculating the horizontal lifting stroke L Lifting device ＝H pi +H P Judging if L Lifting device ≤L Limiting the limit Executing step 4); if L Lifting device ≥L Limiting the limit Re-executing step 3) until the next step is entered; if getL Lifting device ≥L Limiting the limit The error reporting is terminated;
5) Lifting execution, starting each lifting cylinder 11 according to the lifting stroke L Lifting device Executing;
6) Correcting the level, measuring the final distance EH between each supporting point after the lifting execution is completed pi The phase laser sensor 32 is started, the laser light is emitted to the bottom of the freight car box 1 and returns to obtain the ranging result, and the ranging result is at the same level reference Z 0 And under the premise of emitting laser vertically, the final distance EH between the bottoms of the side branch water column 23 and the bottom of the tank is measured respectively pi Wherein i=1-n is a positive integer, n is the number of lift cylinders, if n=4, EH is obtained P1 、EH P2 、EH P3 And EH P4 The method comprises the steps of carrying out a first treatment on the surface of the Sequencing from small to large, taking the minimum value, descending the piston of the lifting cylinders of the other lifting cylinders, testing the distance at intervals t, and calculating the difference delta until the difference delta is zero, thereby completing the correction level. If all are equal, the correction level is completed;
6) Weighing, transmitting back the pressure values of the pressure sensors at the tops of the N lifting cylinders, calculating the pressure sum to obtain weighing pressure P, wherein the unit is N and Newton, and obtaining the net loadUnit kg, weight of whole vehicle G Vehicle 1 ＝G Load carrier +G Vehicle 0 Wherein G is Vehicle 0 For the servicing weight of a freight car, the car is provided with a radio frequency identification card (RFID), and the control mechanism 30 will G Load carrier 、G Vehicle 1 And sending the data to a metering platform through a wired or wireless network to finish unattended automatic weighing metering.
In order to solve the technical problem that the carrying capacity can be accurately measured only by lifting once, the invention adopts the following means:
(1) Distance measurement horizontal reference Z with absolute level and same height Z is realized by cooperation of communicating vessel and floater 0
The top of the liquid surface of each side branch water column pipe 23 of the communicating vessel is connected with the atmospheric pressure, so that the liquid surface of each side branch water column pipe 23 is at the same horizontal plane even in an inclined state; the float on the liquid surface has its maximum cross section designed so that the laser beam at the top of the float is calibrated perpendicular to the maximum cross section, the maximum cross section of the float floats on the liquid surface, and the phase laser sensor 32 at the top of the float is also located at the absolute level and at the same level as the ranging level reference Z 0 。
(2) Based on distance measurement horizontal reference Z 0 And the distance measurement control is used for lifting the final position, so that absolute horizontal lifting is realized once.
This is embodied in the step of correcting the horizontal position after the lifting, and measuring the final distance EH between the support points after the lifting is completed pi Sequencing from small to large, taking the minimum value, descending the piston of the lifting cylinders of the other lifting cylinders, testing the distance at intervals t, and calculating the difference delta until the difference delta is zero, thereby completing the correction level. If all are equal, the correction level is completed. It is the ranging level reference Z that is located at absolute level and at the same height 0 The basis for the existence of such a correction level is precisely achieved.
Ranging horizontal reference Z 0 And the correction level are mutually based, and cooperate to enable the control mechanism 30 to accurately measure the load capacity by only lifting once.
According to the truck-mounted static internet-of-things weighing device of the freight car, the horizontal reference is determined by the horizontal adjusting mechanism, the load in the carriage of the freight car is accurately weighed through the cooperative cooperation of the horizontal reference and the lifting weighing mechanism, the weighing precision is less than 250g, and the weighing accuracy is greatly improved.
Claims (7)
1. The utility model provides a horizontal lifting weighing method of on-vehicle static thing networking weighing device of freight transportation car, carriage (1) is interchangeable and is born the weight of ground and set up on a pair of car longeron (13), on-vehicle static thing networking weighing device of freight transportation car includes:
the lifting weighing mechanism (10), the lifting weighing mechanism (10) comprises at least n lifting oil cylinders (11), and n is a positive integer greater than or equal to 3; the lifting oil cylinder (11) is fixed on the supporting cross beam (17) through the base (12), the supporting cross beam (17) is fixed on the longitudinal beam (13), and a pressure sensor (31) is arranged at the top of a lifting piston of the lifting oil cylinder (11); the horizontal adjusting mechanism (20), the horizontal adjusting mechanism (20) comprises a communicating vessel (21), the communicating vessel (21) comprises side branch water column pipes (23) which are communicated with each other and correspond to the number of the lifting cylinders, and the side branch water column pipes (23) are fixed beside the lifting cylinders (11);
a floater (26) is arranged on the liquid level of the side branch water column pipe (23), the floater (26) is provided with a triangular maximum cross section (26.1), a cross rod (28) extends outwards along the maximum cross section at three vertex positions of the maximum cross section, the emitted laser beam of the calibration phase laser sensor (32) is perpendicular to the plane of the end point of the cross rod (28), and then the circle center of the positioning floating ball (27) is fixedly arranged at the end point of the cross rod (28);
the float (26) is provided with a vertical positioning mechanism (50), the top of the vertical positioning mechanism (50) is provided with a phase laser sensor (32), and the vertical positioning mechanism (50) ensures that the float floats on the liquid surface in a horizontal mode with the maximum cross section (26.1);
the control mechanism (30) comprises a main chip, and the main chip is connected with the pressure sensor (31) and the phase laser sensor (32) through optical fiber data wires;
it is characterized in that the method comprises the steps of,
the horizontal lifting weighing method of the truck-mounted static internet of things weighing device of the freight car comprises the following steps of:
1) Judging whether weighing and lifting are safe or not, wherein an inclination sensor (33) is arranged at the center position of the geometric dimension of the bottom of the carriage (1), the control mechanism (30) starts the inclination sensor (33) to detect the actual inclination beta of the automobile, and meanwhile, judging that beta is more than or equal to alpha, wherein alpha is the limit inclination of the weighing vehicle, and if so, a display shows that the automobile is too inclined, so that the weighing and lifting safety is affected; if β < α, then step 2) is performed;
2) Positioning ranging horizontal reference Z 0 The automobile is parked, the automobile engine is flameout, the storage battery is powered, and the automobile engine is communicatedThe liquid level in the side branch water column (23) of the device (21) has an absolute level pi even in an inclined state, which makes the phase laser sensor (32) at the top of each float (26) floating on the liquid level also be located absolutely at the same ranging level reference Z 0 And the laser beam emitted by the phase laser sensor (32) is also absolutely perpendicular to the horizontal plane pi;
3) Measuring initial distance SH of each supporting point pi The laser beam is emitted to the bottom of the carriage (1) and returned to obtain the ranging result, and the same ranging level reference Z is obtained 0 And under the premise of vertically emitting laser beams, respectively measuring the initial distance of the tank bottom at the position of the side branch water column pipe (23), wherein the initial distance of the tank bottom is the initial distance SH of each supporting point pi Wherein i=1, a positive integer of 2 … … n, n is the number of lifting cylinders;
4) Lifting judgment, calculating lifting stroke L Lifting device Sequentially taking the horizontal lifting distanceWherein H is the maximum lifting stroke; calculate the lifting stroke L Lifting device ＝SH pi +H P Judging if L Lifting device ≤L Limiting the limit Then enter the next step; if L Lifting device ＞L Limiting the limit Re-executing step 4), taking the next number until the next step is entered; if get->L Lifting device ＞L Limiting the limit The error reporting is terminated;
5) Lifting execution, starting each lifting oil cylinder (11) according to the lifting stroke L Lifting device Executing;
6) Correcting the level, measuring the final distance EH between each supporting point after the lifting execution is completed pi The phase laser sensor (32) is started to respectively measure the final distance of the tank bottom of the position of the side branch water column pipe (23), wherein the final distance of the tank bottom is the final distance EH of each supporting point pi Wherein i=1, a positive integer of 2 … … n, n is the number of lifting cylinders; sequencing from small to large, taking the minimum value, descending the lifting pistons of other lifting cylinders, testing the distance at intervals of t,at the same time calculate the minimum final distance EH pi From other final distances EH pi The difference delta between the two is zero, namely the correction level is completed, and if the difference delta is equal to the zero, the correction level is completed;
7) Weighing, transmitting back the pressure values of the pressure sensors at the tops of the N lifting cylinders, calculating the pressure sum to obtain weighing pressure P, wherein the unit is N and Newton, and obtaining the net loadg=9.8N/kg, in kg, where G Box (BW) The weight of the carriage; weight G of whole vehicle Vehicle 1 ＝G Load carrier +G Vehicle 0 Wherein G is Vehicle 0 For the weight of the freight car, the control mechanism (30) controls G Load carrier 、G Vehicle 1 And sending the data to a metering platform through a wired or wireless network to finish unattended automatic weighing metering.
2. The horizontal lifting weighing method of a truck-mounted static internet of things weighing device according to claim 1, characterized in that the vertical positioning mechanism (50) comprises an upper tetrahedron (51) and a lower tetrahedron (52), the upper tetrahedron (51) and the lower tetrahedron (52) being integrally connected coplanar with the maximum cross section (26.1); the upper tetrahedron (51) has an upper vertex (53), the lower tetrahedron (52) has a lower vertex (54), and the upper vertex (53) has an upper vertical distance H to the maximum cross section 1 Having a lower vertical distance H less than the lower apex to maximum cross-section 2 。
3. A horizontal lifting weighing method of a truck on-board static internet of things weighing apparatus according to claim 2, characterized in that the line connecting the upper (53) and lower (54) vertices crosses the centre of gravity of the largest cross section (26.1) and the upper vertical distance H 1 And a lower vertical distance H 2 Satisfy H 2 ≥2H 1 。
4. A horizontal lifting weighing method of a truck-mounted static internet of things weighing device of a freight car according to claim 3, wherein the supporting beam (17) comprises a dovetail groove positioning part (17.3), the base (12) is provided with a positioning taper hole (18), the bottom of the base (12) is provided with a conical positioning table (19), the verticality between the rotation axis of the positioning taper hole (18) and the bottom surface of the conical positioning table (19) is less than 0.02mm, and the conical positioning table (19) is matched and pressed in the dovetail groove positioning part (17.3).
5. The horizontal lifting weighing method of the on-board static internet of things weighing device of the freight car according to claim 1, characterized in that a lifting piston (16) is arranged in a lifting oil cylinder (11), the lifting piston (16) comprises a ball head (16.1), a ball head support (16.2) is rotatably fixed on the ball head (16.1), and a cylindrical protruding part of the ball head support (16.2) extends into a blind hole (2) of a box body of a carriage (1); the top of the ball head support (16.2) is provided with the pressure sensor (31).
6. The horizontal lifting weighing method of the on-board static internet of things weighing device of the freight car according to claim 1, characterized in that colored liquid (22) is arranged in the communicating vessel (21), an air port (24) and an automatic rotating cover (25) are arranged at the top end of the side branch water column tube (23), the automatic rotating cover (25) can receive an instruction of the control mechanism (30) to enable the side motor to be started, the automatic rotating cover (25) is driven to rotate through the gear transmission mechanism, the air port (24) is leaked, and meanwhile the top cover is rotated to the side.
7. The horizontal lifting weighing method of the on-board static internet of things weighing device of the freight car according to claim 1, characterized in that the on-board static internet of things weighing device of the freight car further comprises a limit-tilt mechanism (40), the limit-tilt mechanism (40) comprises a limit-tilt rod (41) and a limit-tilt sleeve (42), the limit-tilt rod (41) is installed at the bottom of a box body of four corners of a carriage (1), the limit-tilt sleeve (42) is fixed on a longitudinal beam (13) through a transverse plate, the limit-tilt rod (41) penetrates through an inner hole of the limit-tilt sleeve (42), an adjusting nut (43) is arranged at the top end of the limit-tilt rod, the distance between the adjusting nut and the bottom of the limit-tilt sleeve is the lifting maximum stroke H, and the limit-tilt rod determines the limit-tilt angle alpha of the weighing car when the limit-tilt rod is obliquely contacted with the inner hole of the limit-tilt sleeve when being lifted to H/2.
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| CN110689271B (en) * | 2019-10-02 | 2023-04-07 | 龙岩华崇信息科技有限公司 | Internet of things intelligent weighing integrated management platform and management method |
| CN111928931B (en) * | 2020-06-22 | 2022-03-08 | 赛摩智能科技集团股份有限公司 | Container weighing system and loading weighing monitoring method |
| CN113008346A (en) * | 2021-02-24 | 2021-06-22 | 程永帅 | Intelligent cargo weighing system for truck |
| CN113639839B (en) * | 2021-03-19 | 2022-06-10 | 徐州工程学院 | Control method of logistics vehicle weighing sensor protection device |
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