KR102267493B1 - Variable axis control method for preventing overload of vehicle using sensor during celebration - Google Patents

Abstract

The present invention relates to a variable axis control method for preventing overload of a vehicle using an axial load sensor, which can easily prevent road damage due to random operation of a variable shaft by a vehicle driver and avoid overload detection and easily determines an overload state of a vehicle while significantly reducing an error. Furthermore, the present invention measures load in real-time to prevent overload and rollover of the vehicle, in advance, and safely protect the vehicle from external impact.

Description

Variable axis control method for preventing overload of vehicle using sensor during celebration}

The present invention can easily prevent road damage and overload detection avoidance caused by the driver's arbitrary manipulation of a variable axis, as well as easily determine the overload state of the vehicle with significantly reduced errors, and furthermore, real-time load It relates to a variable shaft control method for preventing overloading of a vehicle using an axial weight sensor that can measure and prevent overload and rollover of the vehicle in advance, as well as safely protect it from external impact.

In general, trucks and specially equipped vehicles are vehicles for transporting cargo exclusively, and in order to reduce transportation costs in the road sector using cargo vehicles, the government allows the installation of variable axles and introduces and applies related systems.

A variable shaft is a type of axle that is mainly installed and used in medium-sized trucks. It means an axle that can be lifted up/down differently from a general fixed shaft.

The current road law permits a load capacity of 10 tons per axle with a gross weight of 40 tons, so the variable axle allows vehicles to load more cargo.

In general, the variable shaft 9 is lowered or raised by the operation of the lift air bellows 51 and the load air bellows 52 as shown in FIG. 1 .

In addition, the lift air bellows 51 and the load air bellows 52 are configured to operate by a predetermined pneumatic circuit, and such operation control may be performed using a method directly controlled by a driver or an automatic control method.

In addition, the variable shaft for distributing the load of such a truck is a device that requires not only rigidity during elevating and lowering movements, but also stable driving.

In relation to such a variable shaft, a variable shaft welding device for a vehicle and a welding method thereof for welding a variable shaft installed in a vehicle for the purpose of distributing the weight of cargo have been recently proposed as Korean Patent Registration No. 10-1596933. , In Korea Patent Publication No. 10-1596933, only an apparatus for welding a variable shaft and a welding method thereof are presented, but a method for determining vehicle overload and operation of the variable shaft are not presented at all.

Domestic Registered Patent Publication No. 10-1596933

The present invention can easily prevent road damage and overload detection avoidance caused by the driver's arbitrary manipulation of a variable axis, as well as easily determine the overload state of the vehicle with significantly reduced errors, and furthermore, real-time load It is an object of the present invention to provide a variable shaft control method for preventing overload of a vehicle using an axial weight sensor that can measure and prevent overload and rollover of the vehicle in advance, as well as safely protect from external impact.

The present invention for achieving the above object is an axial load measuring step of measuring the axial load of the axle by an axial load sensor mounted on the axle of the vehicle; a variable-axis state detection step of detecting an elevation state of a variable shaft of the vehicle by a variable-shaft state detection unit; an overload determination step of judging an overload condition based on the axial weight value measured by the axial weight sensor; and a variable shaft control step of lowering the variable shaft by controlling the lifting and lowering drive unit of the variable shaft when it is determined by the overload determination step and the variable shaft is in an elevated state by the variable shaft state detection unit. It provides a variable shaft control method for preventing overload of a vehicle using an axle weight sensor, characterized in that.

Here, in the variable shaft state detection step, a variable shaft control method for preventing overload of a vehicle using an axle weight sensor, characterized in that the variable shaft state is detected by using a pneumatic sensor measuring the air pressure of the air suspension of the variable shaft.

And, in the overload determination step, when the variable shaft is lowered in the variable shaft control step, it is preferable to determine the overload state by the detection value of the variable shaft state detection unit instead of the shaft weight sensor.

Furthermore, in the variable axis control step, when the overload determination step determines that the load is less than the overload standard based on the detection value of the variable axis state detection unit, it is preferable to control the lifting drive unit of the variable axis to raise the variable axis.

In addition, the axial load sensor of the axial load measuring step includes a metal sheet having one welded portion and the other welded portion respectively welded to the axle of the vehicle at both ends of the left and right ends, and an upper middle portion located between one welded portion and the other welded portion of the metal sheet. An insulating layer formed on a surface, a linear strain gauge grid pattern formed on the insulating layer in a direction from one side to the other, an electrode formed on the insulating layer to be electrically connected to both ends of the linear strain gauge grid pattern, and the electrode; a vehicle axle weight sensor module unit comprising a protective layer formed on the insulating layer in a state including the linear strain gauge grid pattern other than the linear strain gauge; a cover part fixed to the axle of the vehicle while the vehicle axle weight sensor module part is accommodated inside; It is preferable to include a fixing part for fixing the cover part to the axle of the vehicle.

In addition, a receiving groove for accommodating the vehicle axle load sensor module part is formed on the upper part of the cover part, and a packing part is formed between the upper surface of the cover part around the receiving groove and the outer peripheral surface of the axle around the vehicle axle load sensor module part; It is preferable to be provided.

And, a cable passing through the cover part and connected to the electrode of the vehicle axle weight sensor module part; is preferably provided.

In addition, an accommodating groove for accommodating the vehicle axle weight sensor module part is formed on the upper part of the cover part, and an injection hole communicating with the accommodating groove is formed on the lower part of the cover part, and the vehicle is filled into the accommodating groove through the injection hole. It is preferable that a filling part to protect the axial weight sensor module part is provided.

Here, it is preferable that the filling part consists of a liquid urethane liquid or a liquid foaming liquid.

In addition, the fixing portion includes a fixing bolt having an upper portion fixed to an outer circumferential surface of the axle around each corner of the vehicle axle weight sensor module portion and a lower portion vertically penetrating each corner portion of the cover portion; It is preferable to include a nut screwed to a lower portion of the fixing bolt.

And, a first auxiliary fixing bar closely fixed to the outer peripheral surface of the cover portion; a second auxiliary fixing bar closely fixed to the outer circumferential surface of the axle opposite the cover portion; auxiliary fixing members for connecting and fixing the front side of the first auxiliary fixing bar and the front side of the second auxiliary fixing bar and the rear side of the first auxiliary fixing bar and the rear side of the second auxiliary fixing bar respectively; It is preferable that a fixing part is provided.

In addition, a strain amplifier is fixed to the outer peripheral surface of the axle opposite to the cover part, and an auxiliary cover part fixed to the outer peripheral surface of the axle opposite to the cover part in a state in which the strain amplifier is accommodated inside; 2 The auxiliary fixing bar is preferably fixed in close contact with the auxiliary cover portion.

And, the vehicle axle weight sensor module is fixed to one side and the other side of the axle of the vehicle, respectively, the linear strain gauge grid pattern, respectively, a first wireless communication unit for wirelessly transmitting the load tension value of one side and the other side of the measured axle; a first power supply unit for supplying power to the first wireless communication unit; a second wireless communication unit for receiving the tensile load value to the first wireless communication unit; a second power supply unit for supplying power to the second wireless communication unit; a calculation unit for summing the load tensile values of one side and the other side of the axle received by the second wireless communication unit; a notification unit notifying whether the vehicle is overloaded and whether the vehicle is overturned; The second wireless communication unit controls the notification unit so that the notification unit notifies whether the vehicle is overloaded by comparing the load tension values of one side and the other side of the axle calculated by the calculation unit with the reference load tension value in a state where the vehicle is stopped and the vehicle is running A notification control unit for controlling the notification unit so that the notification unit notifies whether the vehicle is overturned while driving by comparing the tensile values of one side and the other side of the axle received by the notification control unit; is preferably provided.

According to the present invention, when the overload is determined by the overload determination step, and when the variable shaft is in the rising state by the variable shaft state detection unit in the variable shaft control step, the variable shaft is lowered by the variable shaft control unit, so that the driver of the vehicle arbitrarily manipulates the variable shaft. There is an effect that can easily prevent road damage and overload detection.

In addition, the overload state of the vehicle through the detection value of the variable shaft state detection unit consisting of a pneumatic sensor that measures the air pressure of the air suspension of the variable shaft instead of the shaft weight sensor when the variable shaft is lowered by the variable shaft controller by the overload determination unit It has the effect of judging the stop state and, in particular, the overload state of the vehicle in motion, with a significantly reduced error.

Furthermore, real-time load measurement is possible through the linear strain gauge grid pattern of the vehicle axle weight sensor module part for the tension of the load acting on the axle of the vehicle, so that overload and overturning of the vehicle can be prevented in advance as well as the vehicle axle weight sensor module There is an effect that can safely protect the vehicle axle weight sensor module part through the cover part fixed by the fixing part to the axle by accommodating the part inside.

1 is a side view schematically showing a lift air bellows and a rod air bellows for elevating a variable shaft;
2 is a block diagram schematically showing a method for controlling a variable shaft for preventing overload of a vehicle using an axial weight sensor according to an embodiment of the present invention;
3 is a block diagram schematically showing a control state of a variable-axis control unit;
4 is a flowchart schematically showing the operation process of the variable shaft;
5 is a combined front view schematically showing a state in which the vehicle axle weight sensor module part is separated from the axle of the vehicle;
Figure 6 is an exploded front view of Figure 5,
7 is a perspective view schematically showing a vehicle axle weight sensor module unit;
8 is a cross-sectional view taken along line A - A of FIG. 7;
9 is a perspective view sequentially illustrating a process in which an insulating layer, a linear strain gauge grid pattern, an electrode, and a protective layer are formed on a metal sheet;
10 is an exploded perspective view schematically showing a state in which the cover part and the auxiliary cover part are separated from the axle;
11 is an exploded cross-sectional view taken along line B - B of FIG. 10;
12 is an exploded cross-sectional view taken along line C - C of FIG. 10;
13 is a combined perspective view schematically showing a state in which the cover part and the auxiliary cover part are coupled from the axle;
14 is a coupling cross-sectional view taken along line D - D of FIG. 13;
15 is a coupling cross-sectional view taken along line E - E of FIG. 13;
16 is a cross-sectional view schematically showing a state in which the filling part is injected into the receiving groove of the cover part through the injection hole of the cover part;
17 is a cross-sectional view schematically showing a state in which the inlet of the cover is closed;
18 is a block diagram schematically illustrating a control state of a notification control unit.

Hereinafter, a preferred embodiment of the present invention will be described in more detail based on the accompanying drawings. Of course, the scope of the present invention is not limited to the following examples, and various modifications may be made by those of ordinary skill in the art without departing from the technical gist of the present invention.

2 is a block diagram schematically illustrating a method for controlling a variable shaft for preventing overload of a vehicle using an axial weight sensor according to an embodiment of the present invention.

As shown in FIG. 2 , the variable shaft control system for vehicle overload prevention using an axle load sensor according to an embodiment of the present invention includes an axle load measurement step, a variable shaft state detection step, an overload determination step and a variable shaft control step. .

3 is a block diagram schematically illustrating a control state of a variable-axis control unit.

First, the axial load measuring step is a step of measuring the axial load of the axle by the axial load sensor 8 mounted on the axle of the vehicle as shown in FIG. 3 , and the axial load sensor 8 is for convenience of description. It will be described in detail below.

Next, the variable shaft state detection step is a step of detecting the elevation state of the variable shaft ( 9 in FIG. 1 ) of the vehicle by the variable shaft state detection unit 1 .

Here, the variable shaft state detection unit 1 may be formed of various types, and, for example, may include a pneumatic sensor that measures the air pressure of a pneumatic tube of the air suspension of the variable shaft 9, and the variable shaft 9 ) of the air suspension, various types of opening/closing valves such as a pneumatic solenoid valve for opening and closing the pneumatic pipe under the control of the variable shaft control unit 7 may be provided.

When the pneumatic measurement value measured by the pneumatic sensor capable of achieving the variable shaft state detection unit 1 is less than the reference pneumatic value set in the variable shaft control unit 7 , the pneumatic sensor capable of achieving the variable shaft state detection unit 1 . can be determined that the variable shaft 9 of the vehicle is in an elevated state.

When the pneumatic measurement value measured by the pneumatic sensor capable of achieving the variable shaft state detection unit 1 exceeds the reference pneumatic value set in the variable shaft control unit 7, the pneumatic pressure capable of achieving the variable shaft state detection unit 1 The sensor may determine that the variable shaft 9 of the vehicle is in a descending state.

4 is a flowchart schematically illustrating an operation process of the variable shaft.

Next, as shown in FIG. 4 , the overload determination step determines the overload condition of the vehicle through the overload determination unit 2 that determines the overload condition of the vehicle based on the shaft weight value measured from the shaft weight sensor 8 . will judge

Next, in the variable axis control step, as shown in FIG. 4 , overload is determined by the overload determination unit 2 of the overload determination step, and the variable axis 9 is controlled by the variable axis state detection unit 1 In the case of the rising state, the variable shaft control unit 7 receives power from the power supply unit 6 and controls the lift driving unit 5 of the variable shaft 9 to lower the variable shaft 9 .

The lifting driving part 5 of the variable shaft 9 expands/contracts the lift air bellows (51 in FIG. 1) and the load air bellows (52 in FIG. 1) by using the pneumatic pressure of the air tank to expand/contract the variable shaft ( 9) as elevating, since this is a known matter, a detailed description below will be omitted.

Next, when the variable shaft 9 is lowered by the variable shaft control unit 7 of the variable shaft control step, the overload determination unit 2 of the overload determination step is performed instead of the axial load sensor 8 . The overload state can be determined by the detection value of the variable shaft state detection unit 1 .

When the pneumatic measurement value measured by the pneumatic sensor capable of forming the variable shaft state detection unit 1 is less than the reference pneumatic value set in the variable shaft control unit 7, the overload determination unit 2 determines that the vehicle is less than the overload standard In addition to the determination, the variable shaft control unit 7 may control the lift drive unit 5 so that the variable shaft 9 rises.

When the pneumatic measurement value measured by the pneumatic sensor capable of forming the variable shaft state detection unit 1 exceeds the reference pneumatic value set in the variable shaft control unit 7, the overload determination unit 2 determines that the vehicle exceeds the overload standard In addition to being determined to be , the variable shaft control unit 7 may control the lifting drive unit 5 so that the variable shaft 9 descends.

As described above, in the present invention, when overload is determined by the overload determination step, and the variable shaft 9 is in an elevated state by the variable shaft state detection unit 1 of the variable shaft control step, the variable shaft control unit ( 7), since the variable shaft 9 is lowered, there is an advantage in that it is possible to easily prevent road damage and overload detection due to the driver's arbitrary manipulation of the variable shaft 9 .

In addition, the present invention provides an air suspension of the variable shaft 9 instead of the axial weight sensor 8 when the variable shaft 9 is lowered by the variable shaft control unit 7 in the overload determination unit 2 Because the overload state of the vehicle is determined through the detection value of the variable shaft state detection unit 1, which consists of a pneumatic sensor that measures the air pressure of There are advantages that can be

5 is a combined front view schematically illustrating a state in which the vehicle axle weight sensor module unit is separated from the axle of the vehicle, and FIG. 6 is an exploded front view of FIG. 5 .

Next, as shown in FIGS. 5 and 6 , the axial load sensor 8 of the axial load measurement step includes a vehicle axial load sensor module unit 60 , a cover unit 70 and a fixing unit 80 . is done by

First, the vehicle axle weight sensor module unit 60 may be provided on one side lower and the other lower side of the axle 10 of the vehicle, or one upper side and the other upper side of the axle 10 of the vehicle, in the present invention, for convenience of description It will be described in detail by taking as an example that the vehicle axle weight sensor module unit 60 is provided in the lower part of one side and the lower part of the other side of the axle 10 of the vehicle.

Next, the vehicle axle weight sensor module unit 60 is accommodated inside the cover part 70 and is fixed to the lower part of the outer peripheral surface of one side and the lower part of the outer peripheral surface of the other side of the axle 10 of the vehicle, respectively.

Next, the fixing part 80 fixes the cover part 70 to the axle 10 of the vehicle.

7 is a perspective view schematically showing a vehicle axle weight sensor module unit, FIG. 8 is a cross-sectional view taken along line A - A of FIG. 7, and FIG. 9 is an insulating layer, a linear strain gauge grid pattern, an electrode and a protective layer on a metal sheet. It is a perspective view sequentially showing the formation process.

Next, the vehicle axle weight sensor module unit 60 is fixed to the axle 10 of the vehicle to measure the load tension acting on the axle 10, and as shown in FIGS. 7 to 9 , It may be configured to include a metal sheet 610 , an insulating layer 620 , a linear strain gauge grid pattern 630 , an electrode 640 , and a protective layer 650 .

As shown in FIG. 7 , on both left and right ends of the metal sheet 610 , that is, one end and the other end, a welding part 611 and a welding part 612 on the other side may be formed.

One side welding part 611 and the other side welding part 612 of the metal sheet 610 may be welded and fixed to the outer peripheral surface of the axle 10 , respectively.

At this time, the central part of the welding part 611 and the central part of the welding part 612 on the other side are the metal sheet so that the influence on the torsional load generated on the axle 10 is less on the linear strain gauge grid pattern 630 . It is preferable to spot-weld each on the outer circumferential surface of the axle 10 in a state in which the 610 is tensioned.

The metal sheet 610 may be made of various materials, but in particular, it prevents corrosion of the metal sheet 610 that is spot-welded to the outer circumferential surface of the axle 10, so that the metal sheet 610 has durability. It is preferable that the metal sheet 610 is made of a stainless material in order to improve .

Also, an insulating layer 620 for forming the linear strain gauge grid pattern 630 may be formed on the upper surface of the metal sheet 610 as shown in FIG. 8 .

The insulating layer 620 may be formed on at least an upper surface including the middle portion of the metal sheet 10 .

The linear strain gauge grid pattern 630 is for measuring the strain of the metal sheet 610 tensioned by the load applied to the axle 10 , and the metal sheet 10 is formed on the insulating layer 620 . ) may be formed linearly from the front side to the rear side.

In addition, the electrode 640 may be formed to be electrically connected to both ends of the linear strain gauge grid pattern 630 .

At this time, since the measured value changes according to the temperature of the axle 10 when measuring the tensile load acting on the axle 10 using the linear strain gauge grid pattern 630, the insulating layer 620 It is preferable that a temperature compensation grid pattern 641 formed in a direction orthogonal to the direction of the linear strain gauge grid pattern 630 is provided thereon.

By forming the temperature compensation grid pattern 641 as a linear grid extending in a direction perpendicular to the direction of the linear strain gauge grid pattern 630 , that is, in the left and right directions, the effect of the tensile load acting on the axle 10 is minimized. and effective temperature compensation.

In addition, auxiliary electrodes 642 formed on the insulating layer 620 are formed to be electrically connected to both ends of the temperature compensation grid pattern 641 .

The protective layer 650 is formed on the insulating layer 620 in a state including the linear strain gauge grid pattern 630 other than the electrode 640 and the auxiliary electrode 642 to form the metal sheet 610 . corrosion and oxidation can be prevented.

10 is an exploded perspective view schematically showing a state in which the cover part and the auxiliary cover part are separated from the axle, FIG. 11 is an exploded sectional view taken along the line B - B of FIG. 10, and FIG. 12 is the line C - C of FIG. It is an exploded cross-sectional view, and FIG. 13 is a combined perspective view schematically showing a state in which the cover part and the auxiliary cover part are coupled from the axle, FIG. 14 is a combined cross-sectional view taken along the line D - D of FIG. 13, and FIG. 15 is E - of FIG. It is a cross-sectional view taken along line E.

Next, as shown in FIGS. 10 and 11 , a receiving groove 710 for accommodating the vehicle axle weight sensor module unit 60 may be formed on the upper surface of the cover unit 70 to a predetermined depth.

And, between the upper surface of the cover part 70 around the receiving groove 710 and the outer peripheral surface of the axle 10 around the vehicle axle weight sensor module 60, it can be made of various types, such as an O-ring of a rubber material. A packing portion 90 made of an elastic material may be provided.

A seating groove 711 in which the packing part 90 is seated may be formed on the upper surface of the cover part 70 around the receiving groove 710 .

The cover part 70 is shown in FIGS. 10 and 12 to in a state in which foreign substances such as snow and rainwater are prevented from flowing into the receiving groove 710 of the cover part 70 through the packing part 90 . As shown in FIG. 15 , it can be watertightly coupled to the outer peripheral surface of the axle 10 .

16 is a cross-sectional view schematically showing a state in which the filling part is injected into the receiving groove of the cover part through the injection hole of the cover part, and FIG. 17 is a cross-sectional view schematically showing the state in which the injection hole of the cover part is closed.

Next, as shown in FIGS. 16 and 17 , a cable 100 connected to the electrode 640 of the vehicle axle weight sensor module part 60 through the cover part 70 may be provided.

For example, as shown in FIG. 12 , a through hole 712 communicating with the receiving groove 710 may be formed at one lower side of the cover part 70 .

The upper part of the connector 713 may be coupled to the through hole 712 by various methods such as screw coupling, and the cable 100 is in a state in which the outer circumferential surface of the cable 100 is in close contact with the inner circumferential surface of the connector 713 . An upper portion of the may be connected to the electrode 640 of the vehicle axle weight sensor module unit 60 through the connector 713 .

Next, as shown in FIG. 16 , an injection hole 714 communicating with the receiving groove 710 may be formed on the other lower side of the cover part 70 .

As shown in FIG. 17 through the injector connected to the injection hole 714, the filling part 200 is filled into the receiving groove 710 to protect the vehicle axle weight sensor module part 60 may be provided.

The filling part 200 may be formed of various types, such as a liquid urethane liquid or a liquid foaming liquid.

The filling part 200 made of an elastic material that is filled into the receiving groove 710 and hardened after a certain period of time absorbs an external shock applied to the vehicle axle weight sensor module part 60 to thereby absorb the vehicle axle weight sensor module part. As well as safely protecting the 60, it is possible to prevent the inflow of foreign substances such as snow and rainwater into the vehicle shaft weight sensor module unit 60, it is possible to further improve the watertightness.

In addition, there is no fear that the filling part 200 made of an elastic material may interfere with the deformation of the vehicle axle load sensor module unit 60 that is deformed by the tensile load acting on the axle 10 , so the vehicle axle load sensor module It is possible to measure the load tension applied to the axle 10 by the part 60 more precisely.

An injection stopper 715 for opening and closing the injection hole 714 may be coupled to the injection hole 714 in various ways, such as fitting and screwing.

Next, as shown in FIGS. 10 to 15 , the fixing part 80 may be configured to include a fixing bolt 810 and a nut 820 .

The fixing bolt 810 may be formed of various types such as stud bolts.

The upper portion of the fixing bolt 810, which may be made of various types such as stud bolts, may be screwed to the lower outer peripheral surface of the axle 10 around each corner of the vehicle axle weight sensor module unit 60 to a predetermined depth.

The lower portion of the fixing bolt 810, which may be formed of various types such as stud bolts, may vertically penetrate each corner portion of the cover portion 70 around the packing portion 90 .

The nut 820 may be screwed to a lower portion of the fixing bolt 810, which may be formed of various types such as stud bolts.

On the outer peripheral surface of the axle 10 opposite to the cover part 70 , that is, on one upper outer peripheral surface and the other upper outer peripheral surface of the axle 10 , the vehicle axle weight for measuring the load tension acting on the axle 10 . It is preferable that the strain amplifier 61 amplifying the tensile load value measured by the linear strain gauge grid pattern 630 of the sensor module unit 60 into an electrical signal is fixed.

In this way, when the strain amplifier 61 is provided on the outer peripheral surface of the axle 10 opposite to the cover portion 70, the auxiliary cover portion 400 for safely protecting the strain amplifier 61 from external impact. may be further provided.

As shown in FIGS. 11 and 12 , an auxiliary receiving groove 410 for accommodating the strain amplifier 61 may be formed on the lower surface of the auxiliary cover unit 400 to a predetermined depth.

An elastic material that can be made of various types such as a rubber O-ring between the lower surface of the auxiliary cover part 400 around the auxiliary receiving groove 410 and the outer circumferential surface of the axle 10 around the strain amplifier 61 of the auxiliary packing unit 91 may be provided.

An auxiliary seating groove 411 in which the auxiliary packing unit 91 is seated may be formed on the lower surface of the auxiliary cover unit 400 around the auxiliary receiving groove 410 .

The auxiliary cover unit 400 is shown in Fig. 10 in a state in which foreign substances such as snow and rainwater are prevented from flowing into the auxiliary receiving groove 410 of the auxiliary cover unit 400 through the auxiliary packing unit 91. , can be watertightly coupled to the outer peripheral surface of the axle 10 opposite to the cover portion 70 as shown in FIGS. 13 and 14 .

The auxiliary cover part 400 may be coupled to the outer peripheral surface of the axle 10 opposite to the cover part 70 by the fixing part 80 .

A lower portion of the fixing bolt 810 of the fixing part 80 may be screwed to the upper outer peripheral surface of the axle 10 around each corner of the strain amplifier 61 to a predetermined depth.

The upper part of the fixing bolt 810 of the fixing part 80 may vertically penetrate each corner of the auxiliary cover part 400 around the auxiliary packing part 91 .

The nut 820 of the fixing part 80 may be screwed onto the fixing bolt 810 .

An auxiliary injection port 412 communicating with the auxiliary receiving groove 410 may be formed on one upper side or the other upper side of the auxiliary cover part 400 .

The filling part 200 protecting the strain amplifier 61 may be filled into the auxiliary receiving groove 410 through an injector connected to the auxiliary injection port 412 .

The filling part 200 made of an elastic material that is filled into the auxiliary receiving groove 410 and hardened after a certain period of time absorbs an external shock applied to the strain amplifier 61 to safely protect the strain amplifier 61. Of course, it is possible to prevent the inflow of foreign substances, such as snow and rainwater, into the strain amplifier 61, thereby further improving the watertightness.

An injection stopper 413 for opening and closing the auxiliary injection port 412 may be coupled to the auxiliary injection port 412 in various ways such as fitting and screwing.

Next, an auxiliary fixing part 300 for strongly fixing the cover part 70 and the auxiliary cover part 400 to the outer peripheral surface of the axle 10 may be further provided.

As shown in FIGS. 10 to 13 , the auxiliary fixing unit 300 may be configured to include a first auxiliary fixing bar 310 , a second auxiliary fixing bar 320 , and an auxiliary fixing member 330 . .

In a state where the upper portion of the first auxiliary fixing bar 310 is in close contact with the lower outer circumferential surface of the cover portion 70 , the first auxiliary fixing bar 310 is attached to the cover portion 70 by a fastening member 3 . position can be fixed.

The fastening member 3, which may be made of a fastening bolt, includes the front side of the first auxiliary fixing bar 310 between the fixing bolts 810 of the fixing part 80, the front side of the cover part 70, and the second side of the first auxiliary fixing bar 310 between the fixing bolts 810 of the fixing part 80. The rear side of the first auxiliary fixing bar 310 and the rear side of the cover part 70 may be sequentially screwed.

A lower accommodating groove 311 in which the lower portion of the cover part 70 is accommodated may be formed at a predetermined depth in the upper center of the first auxiliary fixing bar 310 .

In a state where the lower portion of the second auxiliary fixing bar 320 is seated on the outer circumferential surface of the axle 10 opposite to the cover portion 70 , the second auxiliary fixing bar 320 is the cover portion 70 . It may be closely fixed to the outer circumferential surface of the opposite axle 10 .

Alternatively, in a state in which the lower portion of the second auxiliary fixing bar 320 is in close contact with the upper outer circumferential surface of the auxiliary cover unit 400 , the second auxiliary fixing bar 320 is attached to the auxiliary cover unit 400 with the fastening member. The position can be fixed by (3).

The fastening member 3, which may be made of a fastening bolt, includes the front side of the second auxiliary fixing bar 320 between the fixing bolts 810 of the fixing part 80 and the front side of the auxiliary cover part 400 and the The second auxiliary fixing bar 320 may be sequentially screwed to the rear side and the rear side of the auxiliary cover unit 400 .

In the lower center of the second auxiliary fixing bar 320 , an upper receiving groove 321 in which the upper portion of the auxiliary cover unit 400 is accommodated may be formed to a predetermined depth.

The auxiliary fixing member 330 may include an auxiliary fixing bolt 331 and an auxiliary nut 332 to connect and fix the first auxiliary fixing bar 310 and the second auxiliary fixing bar 320 .

The auxiliary fixing bolt 331 is a front side of the first auxiliary fixing bar 310, a front side of the second auxiliary fixing bar 320, and a rear side of the first auxiliary fixing bar 310 and the second auxiliary fixing bar. It may be made of various types such as stud bolts vertically penetrating the rear side of the 320 .

The auxiliary nut 332 may be screwed to the upper and lower portions of the auxiliary fixing bolt 331, which may be formed of various types such as stud bolts, respectively.

18 is a block diagram schematically illustrating a control state of a notification control unit.

Next, as shown in FIG. 18 , the first wireless communication unit 20 , the first power supply unit 30 , the second wireless communication unit 40 , the second power supply unit 50 , the calculation unit 500 , and the notification unit 600 . ) and a notification control unit 700 may be further provided.

The first wireless communication unit 20 may wirelessly transmit load tension values of one side and the other side of the axle 10 measured by the linear strain gauge grid pattern 630 , respectively.

The first power supply unit 30 may be formed of various types such as a battery for supplying power to the first wireless communication unit 20 .

The second wireless communication unit 40 , the second power supply unit 50 , the notification unit 600 , and the control unit 700 may be provided at various locations, such as a driver's seat of the vehicle.

The second wireless communication unit 40 may receive a tensile load value from the first wireless communication unit 20 .

The second power supply unit 50 may be formed of various types such as a battery for supplying power to the second wireless communication unit 40 .

The calculation unit 500 may, for example, be built in the notification control unit 700 and sum the load tension values of one side and the other side of the axle 10 received by the second wireless communication unit 40 .

The notification unit 600 may notify a vehicle driver or a manager of whether the vehicle is overloaded and whether the vehicle is overturned.

The notification unit 200 may be formed of various types, and may include, for example, any one or both of a speaker for outputting an alarm sound such as a siren sound and a light emitting member such as an LED for emitting light.

The notification control unit 700 may control the notification unit 600 so that the notification unit 600 notifies whether the vehicle is overloaded and whether the vehicle is overturned.

As an example, the notification control unit 700 compares the load tension values of one side and the other side of the axle calculated by the calculation unit 500 in a state where the vehicle is stopped with the reference load tension value set in the notification control unit 700 and compares the vehicle The notification unit 600 may be controlled so that the notification unit 600 notifies whether or not the user is overloaded.

When the load tension value of one side and the other side of the axle 10 added by the calculation unit 500 exceeds the reference load tension value preset in the notification control unit 700, the overload determination unit 2 determines that the vehicle is overloaded. In addition to determining the state, the notification unit 600 may output an alarm sound such as a siren sound and emit light to notify the driver or manager that the vehicle is in an overloaded state.

When the load tension value of one side and the other side of the axle 10 summed by the calculation unit 500 is less than or equal to the reference load tension value preset in the notification control unit 700, the overload determination unit 2 determines that the vehicle is in an overloaded state. In addition to determining that it is not, the notification unit 600 may be stopped.

In addition, the notification control unit 700 compares the load tension value of one side and the other side of the axle 10 received by the second wireless communication unit 40 when the vehicle is driving to determine whether the vehicle is overturned while driving the notification unit 600 . may control the notification unit 600 to notify.

When the tensile value of one side of the axle 10 received by the second wireless communication unit 40 and the tensile value of the load on the other side are different from each other, the notification control unit 700 causes a lifting phenomenon on one side or the other side of the axle 10 . It is determined that the risk of overturning of the vehicle is generated and the notification unit 600 outputs an alarm sound such as a siren sound and emits light to inform the vehicle driver of the risk of overturning of the vehicle.

When the tensile value of one side of the axle 10 received by the second wireless communication unit 40 and the tensile value of the load on the other side are the same, the notification unit 600 is stopped by the control of the notification control unit 700 . can be

As described above, the present invention enables real-time load measurement through the linear strain gauge grid pattern 630 of the vehicle axle load sensor module unit 60 for the tension of the load acting on the axle 10 of the vehicle, thereby overloading the vehicle. and the vehicle through the cover part 70 fixed to the axle 10 by the fixing part 80 by accommodating the vehicle axle weight sensor module part 60 inside, as well as to prevent rollover in advance. There is an advantage that can safely protect the axial load sensor module unit (60).

One; variable axis state detection unit, 2; overload judgment unit,
5; lift drive unit, 7; variable axis control,
8; axial load sensor.

Claims (13)

an axial load measuring step of measuring the axial load of the axle by an axial load sensor mounted on the axle of the vehicle;
a variable-axis state detection step of detecting an elevation state of a variable shaft of the vehicle by a variable-shaft state detection unit;
an overload determination step of judging an overload condition based on the axial weight value measured by the axial weight sensor;
a variable shaft control step of lowering the variable shaft by controlling the lifting and lowering driving unit of the variable shaft when it is determined by the overload determination step and the variable shaft is in an elevated state by the variable shaft state detection unit;
The axial load sensor of the axial load measurement step includes a metal sheet having one welded part and the other welded part welded to the axle of the vehicle at both ends, respectively, and the upper surface of the middle part located between the welded part and the other welded part of the metal sheet An insulating layer formed, a linear strain gage grid pattern formed on the insulating layer in a direction from one side to the other, an electrode formed on the insulating layer to be electrically connected to both ends of the linear strain gage grid pattern; a vehicle axle weight sensor module unit comprising a protective layer formed on the insulating layer in a state including the linear strain gauge grid pattern;
a cover part fixed to the axle of the vehicle while the vehicle axle weight sensor module part is accommodated inside;
and a fixing part for fixing the cover part to the axle of the vehicle.
The method of claim 1,
In the variable shaft state detection step, a variable shaft control method for preventing overload of a vehicle using an axle weight sensor, characterized in that detecting the variable shaft state using a pneumatic sensor measuring the air pressure of the variable shaft air suspension.
3. The method of claim 2,
In the overload determination step, when the variable shaft is lowered in the variable shaft control step, the overloaded state is determined by the detection value of the variable shaft state detection unit instead of the shaft weight sensor. Variable axis control method for overload prevention.
4. The method of claim 3,
In the variable shaft control step, when the overload determination step is determined to be less than the overload standard based on the detection value of the variable shaft state detection unit, the variable shaft control unit controls the lift drive unit to raise the vehicle. Variable axis control method for prevention.
The method of claim 1,
An accommodating groove for accommodating the vehicle axle weight sensor module part is formed on the cover part,
A variable shaft control method for preventing overload of a vehicle using an axle load sensor, characterized in that a packing part is provided between the upper surface of the cover part around the receiving groove and the outer peripheral surface of the axle around the vehicle axle load sensor module part.
The method of claim 1,
A variable shaft control method for preventing overload of a vehicle using an axle load sensor, characterized in that it is provided; a cable that passes through the cover part and is connected to the electrode of the vehicle axle load sensor module part.
The method of claim 1,
An accommodating groove for accommodating the vehicle axle weight sensor module part is formed on the cover part,
An injection hole communicating with the receiving groove is formed in the lower part of the cover part,
A variable shaft control method for preventing overload of a vehicle using an axle load sensor, characterized in that it is provided with; a filling part that is filled into the receiving groove through the inlet to protect the vehicle axle load sensor module.
8. The method of claim 7,
The filling part is a variable shaft control method for preventing overload of a vehicle using a shaft weight sensor, characterized in that it consists of a liquid urethane liquid or a liquid foaming liquid.
The method of claim 1,
The fixing part includes a fixing bolt having an upper portion fixed to an outer peripheral surface of an axle around each corner of the vehicle axle weight sensor module and a lower portion vertically penetrating each corner portion of the cover portion;
A variable shaft control method for preventing overload of a vehicle using an axial weight sensor, characterized in that it comprises; a nut screwed to a lower portion of the fixing bolt.
The method of claim 1,
a first auxiliary fixing bar closely fixed to the outer circumferential surface of the cover part;
a second auxiliary fixing bar closely fixed to the outer circumferential surface of the axle opposite the cover portion;
auxiliary fixing members for connecting and fixing the front side of the first auxiliary fixing bar and the front side of the second auxiliary fixing bar and the rear side of the first auxiliary fixing bar and the rear side of the second auxiliary fixing bar respectively; A variable shaft control method for preventing overload of a vehicle using an axial weight sensor, characterized in that a fixed part is provided.
11. The method of claim 10,
A strain amplifier is fixed to the outer peripheral surface of the axle opposite to the cover part,
an auxiliary cover part fixed to the outer circumferential surface of the axle opposite to the cover part in a state in which the strain amplifier is accommodated inside; is provided;
The second auxiliary fixing bar is a variable shaft control method for preventing overload of a vehicle using an axial weight sensor, characterized in that it is closely fixed to the auxiliary cover portion.
The method of claim 1,
The vehicle axle weight sensor module unit is respectively fixed to one side and the other side of the axle of the vehicle,
a first wireless communication unit for wirelessly transmitting the tensile values of one side and the other side of the axle measured by the linear strain gauge grid pattern;
a first power supply unit for supplying power to the first wireless communication unit;
a second wireless communication unit for receiving the tensile load value to the first wireless communication unit;
a second power supply unit for supplying power to the second wireless communication unit;
a calculation unit for summing the load tensile values of one side and the other side of the axle received by the second wireless communication unit;
a notification unit notifying whether the vehicle is overloaded and whether the vehicle is overturned;
The second wireless communication unit controls the notification unit so that the notification unit notifies whether the vehicle is overloaded by comparing the load tension values of one side and the other side of the axle calculated by the calculation unit with the reference load tension value in a state where the vehicle is stopped and the vehicle is running A notification control unit for controlling the notification unit so that the notification unit informs whether the vehicle is overturned while driving by comparing the tensile values of the load on one side and the other side of the axle received by; Variable axis control method for prevention. delete

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