KR100319060B1 - Loadage measuring meter equipped in a freight car using cross level guage - Google Patents

Abstract

The present invention relates to a vehicle-mounted cargo load meter using a horizontal gauge and its weighing method, and more particularly, to calculate an accurate cargo load amount from an axial weight measured at an inclined cargo load shop that is difficult to maintain level. The present invention for this purpose is a device for measuring the axial weight of the freight vehicle using a hydraulic cylinder and a digital hydraulic gauge installed between the wheel support and the loading box of the vehicle, and the freight vehicle when measuring the axial weight of the freight vehicle The axle weight measured by the axle weighing device 20 is calculated by taking into account a posture information of the horizontal vehicle 60 measuring the tilted posture information (pitch, roll) of the cargo vehicle measured from the horizontal system 60. And a central controller 10 for calculating the cargo load of the vehicle and adding the tolerance weight of the vehicle to obtain the total weight of the vehicle, and a display device 30 for displaying the total weight of the vehicle. It is characterized by. Therefore, the present invention calculates the cargo load in consideration of the attitude information of the vehicle measured from the horizontal level, when the cargo is loaded at an inclined cargo loading site arbitrarily, the freight vehicle is not leveled and tilted (pitch ≠ 0 , roll ≠ 0) also has the advantage of obtaining accurate cargo load.

Description

LOADAGE MEASURING METER EQUIPPED IN A FREIGHT CAR USING CROSS LEVEL GUAGE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a built-in onboard freight meter, and more particularly, to a built-in onboard freight meter and a method for measuring the same, using a horizontal system for calculating an accurate load on an inclined cargo loading site that is difficult to maintain level.

In recent years, overloading of heavy freight vehicles has caused severe damage to bridges and roads. Accordingly, the government is seeking various ways to fundamentally block overloading as well as to crack down on overloading vehicles.

Typically, the vehicle loading freight meter (weight weighing station) is installed in the workplace in a manner using a load cell to measure the amount of cargo when the vehicle passes through the weighing platform. However, these weighbridges are expensive equipment costing about 20,000,000 won per unit, so installing these expensive weighbridges at the construction sites and other construction sites where small and medium cargo loading sites or cargo loading sites change frequently can be economically and difficult to install. Follow. Therefore, most of the small and medium sized cargo loading sites except for the large cargo loading sites are used to estimate the loading capacity of cargo vehicles by watching the tires sit down when loading the cargo. In such a situation, it is difficult to fundamentally protect bridges and roads only by overloading vehicles or mandatory installation of expensive weighbridges.

Due to these problems, the development of a low-cost built-in loading freight meter that can measure the load on the vehicle itself instead of the installation of expensive weighbridges has been actively developed.

However, in all existing measuring methods, the level of the measuring device is assumed to be the same. Therefore, when loading a cargo at an inclined cargo loading site, the freight load cannot be accurately obtained when the freight vehicle cannot be leveled and tilted. The development of a built-in freight meter is struggling.

In order to solve the above problems, the present invention measures the attitude information (pitch, roll) of the freight vehicle by using a horizontal gauge and obtains the cargo load by considering the attitude information, and thus the freight vehicle does not maintain the horizontal angle. It is an object of the present invention to provide a vehicle built-in freight meter and a method of weighing the same, using a level gauge, which is designed to obtain accurate cargo loads even in an advanced state.

In addition, the present invention is to manufacture a vehicle loading measuring device at low cost so that it can be embedded in the cargo vehicle to measure the cargo loading amount regardless of the place and the type of cargo and to check it directly from the display device installed in the driver's seat The purpose is to prevent overloading at the cargo loading site.

1 is a block diagram of a vehicle-mounted load meter using a horizontal system according to the present invention.

2 is a flow chart of a method for measuring a vehicle interior load cargo using a horizontal system according to the present invention.

Figure 3 is a perspective view of the axial weight measurement site using a hydraulic cylinder and a digital hydraulic gauge in accordance with the present invention.

Figure 4 is an exemplary view showing a state in which the axial weight measuring apparatus using a hydraulic cylinder and a digital hydraulic gauge according to the present invention attached to the vehicle.

5 is an exemplary view of a horizontal system according to the present invention.

FIG. 6 is a characteristic curve of 'Load Capacity-Power of Digital Hydraulic Gauge' measured at level ground (pitch = 0, roll = 0) for a 15 ton dump truck.

7 is a characteristic curve of the 'Load Cargo-Output of Digital Hydraulic Gauge' measured on a slope (pitch ≠ 0, roll ≠ 0) for a 15 ton dump truck.

8 is an exemplary view of a top view of a stack of 15 ton dump trucks.

9 is an exemplary view of an XYZ coordinate system of a loading box of a 15 ton dump truck.

10 is an exemplary view showing a loading box state for calculating the total weight of the freight vehicle from the axle weight (P _A , P _B ) when the cargo is loaded on a flat surface (pitch = 0, roll = 0) in a 15 ton dump truck .

11 shows the calculation of the total weight of the freight vehicle from the axle weight (P _A , P _B ) when the cargo is loaded at an inclined position (pitch ≠ 0, roll = 0) on a 15 ton dump truck. Illustrated diagram showing the loading state for.

Fig. 12 shows the total weight of the cargo vehicle from the axle weights P _A and P _B when the cargo is loaded at an inclined position (rear and sideways: pitch ≠ 0, roll ≠ 0) on a 15-ton dump truck. Exemplary view showing the state of the loading box for calculating the weight.

Explanation of symbols on the main parts of the drawings

10: central control unit 20: shaft weight measuring device

30: display device 40: data input / output device

50: power supply 60: level

In order to achieve the above object, the present invention provides an axle weight measuring apparatus for measuring a respective axle weight using a hydraulic cylinder and a digital hydraulic gauge installed between a front and rear wheel support and a loading box of a vehicle. A horizontal gauge measuring the tilt attitude information (pitch, roll) of the vehicle, and the respective shaft weights are calculated from the respective measurement data of the shaft weight measuring device, and the respective shaft weights are calculated between the center of gravity of the vehicle and the shaft weight measurement points. The central control unit which calculates the total load of the cargo by calculating and calculating the load information (pitch, roll) of the cargo vehicle measured from the distance and the level gauge (see FIGS. 8 to 12), and the vehicle calculated by the central controller. Characterized in that it comprises a display device for displaying the load amount.

Accordingly, the present invention measures the attitude information (pitch, roll) of the cargo vehicle using a horizontal level when loading the cargo at an inclined cargo loading site arbitrarily and calculates the cargo load by calculating each load by considering the axial weight The low-load vehicle loading measuring device can be built in the freight vehicle to obtain accurate load capacity even when the vehicle is not leveled and tilted (pitch ≠ 0, roll ≠ 0) (see FIGS. 8 to 12). Regardless of the place of loading and the type of cargo, the cargo load can be accurately weighed and checked directly from the indicator installed in the driver's seat.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a vehicle-mounted load gauge according to an embodiment of the present invention, as shown in FIG. 1, each shaft of a freight vehicle using a hydraulic cylinder and a digital hydraulic gauge installed between a wheel support and a loading box of the vehicle. An axis weighing apparatus 20 for measuring weight, a level 60 for measuring tilted attitude information (pitch, roll) of the freight vehicle, when each axle weight according to the load of the freight vehicle is measured, and In consideration of the attitude information of the cargo vehicle measured by the level 60, the axle weight measured by the axle weighing device 20 is calculated and calculated to calculate the cargo load of the vehicle (see FIGS. 8 to 12). The central control unit 10, which calculates the total weight of the vehicle by adding the tolerance weight of the vehicle to the cargo load, the display device 30 that displays the total weight of the vehicle, and the cargo load obtained above Which it is characterized in that it comprises a data input-output device (40).

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

In the present invention, the position of installing the hydraulic cylinder and the digital hydraulic gauge is, as shown in the perspective view of Figure 3, the front wheel left side (1), front wheel right side (2), rear wheel front left (3), rear wheel pressure right ( 4) rear wheel rear left side 5, rear wheel rear right side 6;

Therefore, in the present invention, even when the freight vehicle does not maintain level and is inclined (pitch ≠ 0, roll ≠ 0), an accurate cargo loading amount can be obtained. The measurement method is the same as the flow chart of FIG.

That is, one embodiment of the present invention is installed between the hydraulic cylinder and the digital hydraulic gauge between the vehicle wheel support supporting the front, rear, left and right of the vehicle and the loading box to measure the 'loading capacity-output of the hydraulic gauge' A first step of doing; A second step of calculating the axle weights of the front left, front right, rear left and rear right of the vehicle from the 'cargo load-output of the hydraulic gauge' measured in the first step; The third step of measuring the tilt (pitch, roll) of the vehicle, and the attitude information (pitch, roll) of the vehicle measured from the level when calculating the cargo load from the axial weight calculated in the second step A fourth step of calculating an accurate cargo loading amount even when the freight vehicle does not keep level and is inclined (pitch ≠ 0, roll ≠ 0); A fifth step of calculating the total weight of the vehicle by adding the tolerance weight of the vehicle to the cargo load calculated in the fourth step; In the fifth step, a sixth step of displaying the total weight of the vehicle is performed.

This will be described in more detail as follows.

The central control unit 10 converts the axial weight using the 'cargo load-output of the hydraulic gauge' measured by the vehicle load measuring apparatus 20.

For example, the characteristics of the 'load load-output of the hydraulic gauge' characteristic curve measured on the flat and inclined surface for the 15 ton dump truck is shown in Figures 6 and 7.

As shown in this characteristic curve, it can be seen that the output of the hydraulic gauge changes constantly as the load of the vehicle increases.

Subsequently, the central controller 10 calculates the cargo load amount by considering the distance between the center of gravity of the vehicle and the axis weighing point and the attitude information (pitch, roll) of the vehicle measured from the level gauge 60 (Figs. 8 to 8). 12).

Thereafter, the central controller 10 calculates the total weight of the vehicle by adding the tolerance weight of the vehicle to the cargo load calculated above, and displays the calculated total weight of the vehicle on the driver's seat and / or the roof of the driver's seat. (30).

The display device 30 includes four LED display panels to display the total weight of the vehicle in the form of 'X X. X X'.

Therefore, the maximum weight display value is 99.99 tons and is displayed in increments of 10 kg (= 0.01 ton) from the tolerance weight.

That is, in the present invention, the cargo load can be measured up to 99.99 ton with a precision of 10 Kg units.

If necessary, the central control apparatus 10 transmits data on the total weight of the vehicle or the cargo load to the external device, for example, a printer or PC through the data input / output device 40 to issue a cargo load measurement certificate. .

On the other hand, the operation of calculating the load amount in consideration of the attitude information (pitch, roll) of the vehicle using a horizontal system as described above with reference to FIGS.

Figure 8 is a plan view of the loading box showing the positions of the hydraulic cylinder and the pin joint.

9 is an exemplary view of an XYZ coordinate system of a loading box of a 15 ton dump truck. Is the load value measured in the hydraulic cylinder at point A, Is the load value measured in the hydraulic cylinder at point B, Is the shared load of the pin joint at point C, Denotes the shared load of the pin joint at point D.

At this time, the total weight (W) can be obtained by the following equation.

here, Silver vehicle weight, Is the weight of the loading box, Is the weight of the load.

10 shows the state of the cargo hold when the cargo is loaded on a flat surface (pitch = 0, roll = 0) on a 15 ton dump truck. , As an exemplary view showing), since only one side is considered in symmetry around the X, X 'axis in FIG. ) Simplified in two dimensions.

At this time, the process of deriving equation (6) for calculating the total weight of the freight vehicle from the axial weight (P _A , P _B ) is as follows.

First, the state equation is applied as follows.

, ------ Formula (1)

, ------ Formula (2)

At this time, the shared load ((1) (2)) ) Is expressed as in Equation (3) below.

----- Formula (3)

Therefore, substituting Equation (3) into Equation (1) and arranging it is expressed as Equation (4) below, and the shared load ( ) Is expressed as in Equation (5) below.

------- Formula (4)

--------- Formula (5)

At this time, the compressive force (pressing) acts at point A and the tensile force (lifting) acts at point C. Becomes

In addition, since the symmetry around the X, X 'axis, Becomes

Therefore, the gross weight W is expressed as in the following equation (6).

------ Formula (6)

FIG. 11 shows the state of cargo loading when cargo is loaded in the inclined place (pitch ≠ 0, roll = 0) on a 15 ton dump truck , As shown in FIG. 10, since it is symmetric about the X, X 'axis, it is simplified in two dimensions.

At this time, the process of deriving equation (11) for calculating the total weight of the freight vehicle from the axial weight (P _A , P _B ) is as follows.

First, consider only one side ( Applying the State Equivalence Equation,

, ,

, ---------- Formula (7)

, ---- Formula (8)

Accordingly, the load value ( ) And the shared load ( ) Are expressed as in Equations (9) and (10) below.

-------- Formula (9)

------- Formula (10)

And from the above formula (9) Becomes

Also, symmetry around X, X ' Becomes

therefore, Since gross weight (W) can be obtained as shown in the following formula (11).

------- Formula (11)

Figure 12 where the inclined at 15 ton dump truck (Back, and tilted to the side conditions: pitch ≠ 0, roll ≠ 0 ) if the sileot loads in an explanatory diagram showing a state of the cargo loading area, shaft weight (P _A , P _B ) to derive the equation (15) for calculating the total weight of the freight vehicle is as follows.

First, as shown in Fig. 12 (a), the pitch state ( ), The shared load acting on the hydraulic cylinder ( ) ( ) Can obtain the same results as in the case of FIG.

,

After that, as shown in Fig. 12B, pitch ( ), roll ( Considering the case of), ) ( Is represented by the following equation (12) (13).

------ Formula (12)

------- Formula (13)

At this time, the following equation (14) can be obtained from the above equations (12) and (13).

------ Formula (14)

Therefore, gross weight W can be calculated | required as Formula (15) below.

------- Formula (15)

In-vehicle loading cargo meter in the present invention is characterized in that the output of the hydraulic gauge is changed according to the load of the load without using the existing vehicle loading cargo metering method using an expensive load cell. Using the attitude information (pitch, roll) of cargo vehicles through hydraulic gauges, we propose a method that can measure the exact loading capacity on any slope (see Figures 8-12). It can be manufactured and installed at a low price of about 1/20 (about 1,000,000 won) for the price.

In particular, when loading cargo at an inclined freight loading site, the freight load can be obtained accurately even in a tilted state (pitch ≠ 0, roll ≠ 0) without maintaining the horizontal.

In addition, since the built-in vehicle loading freight meter using the horizontal system of the present invention is installed directly on the vehicle, it is not necessary to install a separate weighbridge, so that each workplace that loads cargo can save the installation cost of the existing meter and load the vehicle. The waste of time spent on freight measurements can also be prevented.

In particular, when the on-board loading cargo meter using the horizontal system of the present invention is installed in all the trucks, the bridge and road can be protected since the driver can immediately grasp the load from the display device installed in the driver's seat at all times, thereby fundamentally preventing overload. If it is installed not only in the driver's seat but also on the driver's roof, when the gross weight of the vehicle is examined at the entrance of the road or bridge, the measurement personnel can directly determine the load directly by snow while the vehicle is running slowly. As it can reduce the measurement time and freight transportation time, it also has the effect of smoothing the flow of traffic.

Claims (3)

Axial weight measuring means for measuring the axle weight of the freight vehicle using a hydraulic cylinder and a digital hydraulic gauge installed between the wheel support and the loading box of the vehicle, and attitude information for measuring the tilted attitude information (pitch, roll) of the freight vehicle In consideration of the measurement means and the degree of inclination of the vehicle measured by the posture information measuring means, the axle weight measured by the axle weight measuring means is calculated and calculated to calculate the cargo load of the vehicle, and the tolerance weight of the vehicle is added to the cargo load. And a central control means for obtaining the total weight of the vehicle, a display means for displaying the total weight of the vehicle, and a data input / output means for outputting the cargo load to the outside. Load Cargo Meter. The onboard cargo load meter of claim 1, wherein the attitude information measuring means is a level gauge. Measuring the 'Load Capacity-Output of Hydraulic Gauge' using hydraulic cylinders and digital hydraulic gauges installed on the front wheel left, front wheel right, rear wheel front left, rear wheel front right, rear wheel left and rear wheel right Computing the axial weight of each vehicle using the characteristic curve measured above, and measuring the degree of inclination of the freight vehicle using a horizontal level, considering the degree of inclination of the vehicle and the weight of the vehicle Calculating the total weight of the cargo by calculating and processing each axial weight calculated in consideration of the distance between the center and the axial weight measurement point, so that the freight load can be accurately loaded even when it is inclined. Weighing method of a vehicle built-in freight meter using a level gauge, characterized in that the obtainable.