KR20080009189A - Apparatus for measuring wheel axle weight of vehicle - Google Patents

Abstract

An apparatus for measuring wheel axle weight of a vehicle is provided to be easily installed on a leaf spring of a vehicle and to recycle installed detection sensors. An apparatus for measuring wheel axle weight of a vehicle comprises a plurality of detection sensors(110,120,130) installed on a leaf spring of a vehicle, which detects an inclination of the detection sensor at the installed position, a reference sensor(140) installed in a vehicle frame of the vehicle, which detects an inclination of the reference sensor at the installed position, a controller(170) converting and outputting a weight signal corresponding to an angle between the inclinations of the detection and the reference sensor, and a display unit(150) displaying the weight signal outputted from the controller.

Description

Axial weight detection device for vehicle {APPARATUS FOR MEASURING WHEEL AXLE WEIGHT OF VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the detection of axle weight of a vehicle, and more particularly, to an apparatus for detecting axle weight of a vehicle that can be easily installed in a leaf spring of a vehicle and that the installed detection sensor can be recycled.

In general, the operation of overload vehicles can damage roads and bridge structures, which can shorten the service life of roads, increase maintenance costs, and reduce the ability to control and brake due to heavy weight. do.

In addition, overload vehicles deteriorate the performance of the road, and thus reduce the capacity of the road, causing noise and vibration during operation, and also act as environmental pollution factors around the road due to exhaust gas emissions.

In order to prevent the damage of overloading, various methods of crackdown and measuring have been introduced. One of these methods is the introduction of a fixed axle weighing system that measures the weight of the vehicle by installing sensors on the floor of the roadway, and introduces private weighbridges in construction sites, logistics warehouses, and import and export ports where freight is frequent. .

However, the measuring devices using the weighbridges are not expanded and operated nationwide due to the problems of budget and equipment operation. Most of the overload measuring methods currently introduced are performed in the weighbridges far from the loading point.

On the other hand, the prior art that can measure the weight of the vehicle itself is attached to the strain gauge on the leaf spring and the system applied to the leaf spring type vehicle to measure the weight of the vehicle by measuring the amount of deformation, and the air pressure of the air spring It can be divided into a pressure system for measuring the weight of the vehicle, and a load cell system for measuring the weight of the vehicle by applying a load cell and a hydraulic gauge system for measuring the weight of the vehicle's loading box.

Most of the above-described methods for measuring the weight of a vehicle show a lot of difference in its principle and configuration, and are commonly used as separate systems.

Meanwhile, in the related art, a method of obtaining an axle weight of a vehicle from a strain change according to a weight of a load loaded by attaching a strain gauge to a leaf spring of the vehicle has been proposed.

As shown in FIG. 1, an apparatus for obtaining an axial weight by attaching a strain gauge to a leaf spring of a vehicle includes installing a strain gauge 30 on a leaf spring 20 installed in a vehicle body frame 10 so as to provide a vehicle body frame 10. The degree of warpage of the leaf spring 20 is detected according to the weight added to or subtracted from, and at this time, the detected degree of warpage is converted into an axial weight.

In the process of installing the strain gauge 30 on the leaf spring 20, the surface of the leaf spring 20 is polished by using a grinder such as a grinder, and washed with acetone. After applying to pressurize at least 5 minutes at a constant pressure (0.3 ~ 07kg / ㎠), it is installed by applying silicon to the outside of the strain gauge 30 to prevent moisture from penetrating into the strain gauge 30 Is terminated.

However, in the process of installing the strain gauge 30 in the leaf spring 20, two skilled workers in the four-axis vehicle spends more than two hours as a working time, three hours in the case of a five-axis vehicle If a non-skilled person is installed, the installation process of surface polishing and washing, bonding, sealing, etc. of the leaf spring 30 is complicated and takes a lot of time.

In addition, the shaft weight detection device using the strain gauge 30 is installed in the leaf spring 20 has the following problems.

First, when the strain gauge 30 is installed in the leaf spring 20, if the foreign matter (for example, antirust paint, dust, lubricant, etc.) is not completely removed from the surface of the leaf spring 20, the strain gauge may be broken or a short circuit may occur. There is a problem that occurs.

Second, if the surface of the leaf spring 20 is not polished regularly, the strain gauge 30 is easily separated after installation due to the irregular surface, or there is a problem of outputting an incorrect value due to the irregular surface.

Third, since the strain gauge 30 is fixed to the surface of the leaf spring 20 using an adhesive, and sealed using a silicone, etc., when the leaf spring 20 is replaced after installation, the strain gauge 30 adheres to the surface of the strain gauge 30. There is a problem that the strain gauge 30 can not be recycled due to the adhesive and silicone.

In other words, the strain gauge is coated with a lattice-shaped resistance wire or photo-etched resistance foil on a thin electric insulator base, and a lead wire is attached to the strain gauge, so that it is impossible to reuse the strain gauge after mounting it by applying an adhesive to the strain gauge surface.

In order to solve the above problems, an object of the present invention is to provide an axial weight detection apparatus for a vehicle that can be easily installed in a leaf spring of a vehicle and that the installed detection sensor can be recycled.

In order to achieve the above object, the present invention is installed in the leaf spring of the vehicle, the detection sensor for detecting the inclination at the installed position; A reference sensor installed in a vehicle body frame of the vehicle and detecting a tilt at the installed position; A control unit for converting and outputting a weight signal corresponding to an angle between the inclination detected by the detection sensor and the inclination detected by the reference sensor; And a display unit for displaying the weight signal output from the control unit.

In addition, the detection sensor and the reference sensor may include a detection unit for detecting and outputting the inclination at the installation position; And an adhesive part installed on a bottom surface of the detection part such that the detection part is closely fixed to the vehicle body frame or the leaf spring.

In addition, the adhesive portion is characterized in that any one of a double-sided tape or a magnetic material is coated with an adhesive, preferably made of neodymium magnets.

The apparatus may further include a fixing part installed at the vehicle body frame or the leaf spring to prevent the installed detection sensor and the reference sensor from flowing, and accommodating the detection sensor and the reference sensor.

In addition, the fixing unit may further include a cover unit to seal the detection sensor and the reference sensor housed with the outside.

In addition, the fixing portion further extends a predetermined length to both sides characterized in that it further comprises a fastening portion for fixing the fixing portion to the leaf spring.

As described above, the axial weight detection apparatus for a vehicle according to the present invention has an advantage of easily installing a detection sensor for detecting a weight and reusing the detection sensor installed when the leaf spring is replaced.

In addition, the present invention has the advantage of preventing the environmental protection and waste of resources by recycling the detection sensor.

In addition, since the present invention detects the weight based on the angle formed by the two sensors, the vehicle loading position can be measured in the same way regardless of flat or inclined land.

In addition, the present invention can be easily installed regardless of the skill of the person installing the shaft weight device, there is an advantage that can shorten the installation time.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a view showing the configuration of the axial weight detection apparatus using the axial weight detection sensor of the vehicle according to the invention, Figure 3 is an exploded view showing the configuration of the detection sensor, Figure 4 is an embodiment of the detection sensor installed 5 is a diagram illustrating a cross section of a detection sensor, and FIG. 6 is a diagram illustrating a state in which a plurality of shaft weight detection sensors are installed in a vehicle.

2 to 6, the axial weight detection apparatus 100 according to the present invention includes a plurality of detection sensors 110 to 130, a reference sensor 140, a control unit 170, and a display unit 150. It includes.

The detection sensors 110 to 130 are installed in the leaf spring 300 of the vehicle body frame 500, and the leaf spring 300 of the substantially circular arc shape is changed as the weight increases according to the difference in the shape of a straight line. A change in the slope (tilt) of 300 is detected and output.

Preferably, the detection sensors 110 to 130 are installed at either one of both ends of the leaf spring 300 having a large inclination change due to the deformation of the leaf spring 300.

The first detection sensor 110 is installed on the leaf spring of the first shaft 510 to detect the shaft weight of the first shaft 510, and the second detection sensor 120 is the leaf spring of the second shaft 520. It is installed in the to detect the shaft weight of the second shaft (520).

That is, in the case of a vehicle having n axes, a detection sensor is installed on each axis, and an nth detection sensor 130 is installed on the nth axis.

In addition, it is preferable to install all the detection sensors in the leaf springs provided in the both wheels of a detection target shaft, and when installing the detection sensors in both leaf springs, 2n detection sensors are provided.

The first detection sensor 110 detects and outputs a detector 111 for detecting and outputting an inclination (tilt) at the installed position, and an adhesive part 112 for fixing the detector 111 in close contact with the surface of the leaf spring 300. In addition, one side of the detection unit 111 is provided with a cable 113 for transmitting the detected inclination information to the control unit 170.

The detector 111 is an inclinometer sensor and outputs inclination information that is changed according to the degree of bending of the leaf spring 300.

The adhesive part 112 is installed on the bottom surface of the detector 111 so that the detector 111 is fixed in close contact with the vehicle body frame 500 or the leaf spring 300. The adhesive part 112 is implemented using a double-coated tape or magnetic material coated with an adhesive. do.

When the adhesive part 112 is implemented as a magnetic material, a neodymium magnet is preferably used. The neodymium magnet is made of a compound of neodymium, iron, and boron (NdFeB), and the force of the magnet is very strong to effectively prevent the detection unit 111 in close contact with the leaf spring 300 to flow or escape.

Meanwhile, the fixing part for fixing the position of the detection sensor to prevent the first detection sensor 110 fixed to the leaf spring 300 from being initially installed due to the vibration generated during the driving of the vehicle. You may install 200 more.

That is, the fixing part 200 is a plastic injection molded product formed with a cable installation groove 212 through which the hollow accommodating part 210 and the cable 113 pass, and by applying an adhesive or the like on the bottom of the fixing part 200. The first spring sensor 300 is fixed to the leaf spring 300, and the first detection sensor 110 is seated in a hollow housing 210 having the same shape as the first detection sensor 110, thereby allowing the flow of the first detection sensor 110 to flow. This should be limited.

Accordingly, the first detection sensor 110 is first fixed to the leaf spring 300 by the adhesive part 112, and the second detection sensor 110 is secondarily fixed to prevent separation or flow from the position installed by the fixing part 200.

In addition, the fixing part 200 is further provided with a cover 220 that can be opened and closed on one side of the upper portion of the first detection sensor 110 seated on the accommodating portion 210 is exposed from foreign matters such as external moisture, dust and the like. Prevent it.

That is, the cover part 220 covers the upper surface of the fixing part 200 after the first detection sensor 110 is seated on the fixing part 200 so that the inside of the fixing part 200 is sealed and maintains a closed state. In order to couple the hook 230 formed on one side of the cover portion 220 with the fixing groove 240.

The second detection sensor 120 and the n-th detection sensor 130 are implemented in the same manner as the first detection sensor 110, the fixing part 200 for preventing flow, and the cover part 220 for sealing with the outside. ) Is also installed in the same way.

The reference sensor 140 is installed on the vehicle body frame 500 as an inclinometer sensor, detects and outputs the inclination of the vehicle body frame 500, and the inclination information output from the reference sensor 140 is installed on the leaf spring 300. It is used as reference inclination information for determining the inclination displacement of the detection sensors 110 to 130.

In addition, the reference sensor 140 is configured in the same manner as the first detection sensor 110, and the fixing part 200 and the fixing part 200 which prevent the reference sensor 140 from flowing from the installation position of the vehicle body frame 500. Also includes a cover 220 to allow the reference sensor 140 installed in the 200 is sealed to the outside.

The display unit 150 displays the weight information output from the control unit 170 for the user to check, and is preferably implemented using an LCD.

The controller 170 may include gradient information detected from the respective detection sensors based on the slope information detected from the first to nth detection sensors 110 to 130, and the slope information detected from the reference sensor 140. The angle of inclination of the inclination information output from the reference sensor 140 is detected, converted into weight information corresponding to the detected angle, and output.

Reference numeral 160 denotes a key input unit and inputs a signal for controlling operation of the shaft weight detection device.

On the other hand, as shown in FIG. 6, the third sensor 530 and the fourth sensor 122 are also provided on the third shaft 530 and the fourth shaft 540 to output tilt information for detecting the shaft weight. An auxiliary reference sensor 141 for outputting slope information for setting the reference of the third sensor 121 and the fourth sensor 122 is installed.

The leaf spring 310 installed on the third shaft 530 and the fourth shaft 540 corresponding to the rear wheel of the vehicle is opposite to the leaf springs installed on the first shaft 510 and the second shaft 520 of the vehicle. (For example, an arc is disposed upward), and a central portion of the leaf spring 310 maintains a tandem shape connected to the vehicle body frame 500.

Therefore, the third and fourth axes 530 and 540 have the auxiliary reference sensor 141 of the leaf spring 310 so as to acquire reference slope information of the leaf spring 310 itself regardless of the inclination of the body frame 500. It is provided in the central portion, and provides the reference slope information for comparing with the slope information output from the third and fourth detection sensors 121 and 122 installed on the third and fourth shafts 530 and 540 installed in the tandem form. .

The comparison information on the angle based on the tilt information detected by the third and fourth detection sensors 121 and 122 and the tilt reference information detected by the auxiliary reference sensor 141 is converted into weight information by the controller 170. It is output through the display unit 150.

On the other hand, Figure 7 is a view showing another embodiment of the shaft weight detection sensor fixing unit of the vehicle according to FIG.

The fixing part 200a according to FIG. 7 has the same configuration as the fixing part 200 shown in FIG. 3, and the fixing part 200a according to FIG. 7 extends a predetermined length to both sides of the fixing part to fix the fixing part 200a. It further comprises a fastening portion 250 of the clip shape to be fixed to the leaf spring (300).

That is, the adhesive for the close contact with the leaf spring 300 is applied to the bottom surface of the fixing portion 200a and fixed first, and the fixing portion 200a by fixing the secondary through the fastening portion 250, the plate spring 300 ) More tightly.

The following describes the installation process of the axial weight detection apparatus of a vehicle according to the present invention.

Foreign substances on the detection sensors 110, 120, 121, 122, and 130, part of the leaf spring 300 of the vehicle in which the auxiliary reference sensor 141 is installed, and a part of the vehicle body frame 500 in which the reference sensor 140 is to be installed. (Oil, dirt, paint, etc.) are removed, and an adhesive is applied to the bottom of the fixing part 200 and then adhered to each installation surface.

When the installation of the fixing part 200 is finished, the detection sensors 110, 120, 121, 122, and 130, the reference sensor 140, and the auxiliary reference sensor 141 are mounted on the accommodating part 210, respectively. It is fixed by the strong magnet of the neodymium magnet of the bonding portion 112.

After that, the lid 220 is covered to seal the upper surface of the fixing part 200, and the installed detection sensors 110, 120, 121, 122, and 130, the reference sensor 140, and the auxiliary reference sensor 141 are provided. By connecting to the control unit 170 through the cable 130, the installation is terminated.

If the above-described installation process is performed in reverse, the detection sensors 110, 120, 121, 122, and 130, the reference sensor 140, and the auxiliary reference sensor 141 may be dropped from the installation position, and the sensor is dropped. They can then be reused.

Next, an operation process of the apparatus for detecting the axle weight of the vehicle according to the present invention will be described.

8 is a view showing a weight detection process according to the angle, Figure 9 is a view showing a weight detection process according to the angle of the three axes and four axes.

(With or without overload)

2, 8, and 9, the control unit 170 includes reference setting inclination information (first solid line) detected by the reference sensor 140 in a tolerance state where no load is loaded, and a first detection sensor ( The inclination information (second solid line) output from the 110 is detected, and at this time, the angle between the first solid line and the second solid line is displayed in the tolerance state of the minimum axis weight.

Subsequently, when the load is loaded, the leaf spring is relaxed, and the inclination information output from the first detection sensor 110 is changed, and the angle between the third solid line and the first solid line, which is the inclination information output at the time of full parking, is formed. The maximum axis weight is displayed in full.

Therefore, if the load is not loaded on the vehicle, the tolerance angle θ is detected, so that the control unit 170 displays the weight of the tolerance state, and the leaf spring is relaxed due to the weight increase due to the loading. When approaching to, the weight of the full state (for example, 10 tons) is displayed so that the presence or absence of overload can be determined.

(Root)

The control unit 170 includes reference setting inclination information (first solid line) detected from the reference sensor 140 in a tolerance state where the load is not loaded, and inclination information (second solid line) output from the first detection sensor 110. In this case, the angle between the first solid line and the second solid line θ is displayed in a tolerance state of minimum axis weight.

Thereafter, when the control unit 170 sequentially loads a load of a predetermined weight (for example, 1 ton) in the tolerance state, the leaf spring is relaxed according to the loaded weight, and the slope is output from the first detection sensor 110. The information is sequentially changed, and at this time, information about the weight that changes in response to the changed angle is displayed.

In addition, even when the vehicle is inclined, the inclination information of the first detection sensor 110 and the reference sensor 140 is changed to be the same, so that the same weight information can be provided by maintaining a constant angle regardless of the position of the vehicle. have.

(Tandem axis)

As shown in FIG. 9, the tandem axis is detected from the reference slope information (first 'solid line) detected from the auxiliary reference sensor 141 provided in the center of the leaf spring and from the third detection sensor 121 provided in the third axis. Tilt information (second 'solid line) and tilt information (third' solid line) detected by the fourth detection sensor 122 provided on the fourth axis are detected, and the angle formed between the first solid line and the second 'solid line (a) and the weight information is displayed by using the angle (b) formed between the first solid line and the third solid line, and the weight information display of the tandem shaft is performed according to the above-mentioned determination of the presence / absence of the overload, The same is done.

That is, when the angle (a) formed between the first solid line detected by the auxiliary reference sensor 141 and the second solid line detected by the third detection sensor 121 is close to the site angle at the full time, the weight of the full state is displayed. It is possible to judge the presence or absence of overload.

In addition, when the angle (b) formed between the first solid line detected by the auxiliary reference sensor 141 and the third solid line detected by the fourth detection sensor 122 approaches the angle of fullness, the weight of the full state is increased. It can be used to determine the presence or absence of an overload.

In addition, when a load of a predetermined weight (for example, 1 ton) is sequentially loaded in the tolerance state, the leaf spring is relaxed according to the loaded weight and is output from the third and fourth detection sensors 121 and 122. The inclination information is sequentially changed, and at this time, information on the weight that changes in response to the changed angle is displayed.

In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can vary as many as possible without departing from the spirit of the present invention as set forth in the claims below. Changes may be made.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the configuration of an apparatus for obtaining an axial weight by attaching a strain gauge to a leaf spring of a typical vehicle.

2 is a view showing the configuration of an axial weight detection apparatus using the axial weight detection sensor of a vehicle according to the present invention.

3 is an exploded view illustrating a configuration of an axial weight detection sensor of a vehicle according to FIG. 2.

4 is a view showing an embodiment in which the axial weight detection sensor of the vehicle according to FIG. 2 is installed;

5 is a cross-sectional view of the axial weight detection sensor of the vehicle according to FIG. 4.

6 is a diagram illustrating a state in which a plurality of shaft weight detection sensors are installed in a vehicle.

7 is a view showing another embodiment of the axle weight detection sensor fixing unit of the vehicle according to FIG. 2.

8 is a view showing a weight detection process according to the angle.

9 is a view showing a weight detection process according to the angles of three and four axes.

(Symbols for the main parts of the drawing)

100: detection device 110: first detection sensor

111: detection part 112: adhesive part

113: cable 120: second detection sensor

130: nth detection sensor 140: reference sensor

141: auxiliary reference sensor 150: display unit

160: key input unit 170: control unit

200, 200a: fixed part 210: storage part

212; Cable mounting groove 220: cover part

230: hook 240: fixing groove

250: fastening portion 300: leaf spring

500: body frame 510: first axis

520: second axis 530: third axis

540: fourth axis

Claims (6)

A detection sensor installed at the leaf spring of the vehicle and detecting an inclination at the installed position; A reference sensor installed in a vehicle body frame of the vehicle and detecting a tilt at the installed position; A control unit for converting and outputting a weight signal corresponding to an angle between the inclination detected by the detection sensor and the inclination detected by the reference sensor; And And a display unit for displaying a weight signal output from the controller. The method of claim 1, The detection sensor and the reference sensor, the detection unit for detecting and outputting the slope at the installation position; And And an adhesive part provided on a bottom surface of the detection part so that the detection part is fixed to the vehicle body frame or the leaf spring in close contact with the vehicle body. The method of claim 2, Wherein the adhesive portion is an axial weight detection device of a vehicle, characterized in that any one of the adhesive-coated double-sided tape or magnetic material. The method according to any one of claims 1 to 3, And a fixing part installed in the vehicle body frame or the leaf spring to receive the installed detection sensor and the reference sensor from the flow, to accommodate the detection sensor and the reference sensor. The method of claim 4, wherein The fixing unit further comprises a cover unit for sealing the received detection sensor and the reference sensor to the outside of the vehicle axle weight detection device. The method of claim 4, wherein The fixed portion further extends a predetermined length to both sides, the shaft weight detection apparatus of a vehicle, characterized in that the fixing portion for fixing to the leaf spring.

Images