KR101718667B1 - Parallel type mutisensor unit for detecting axle number System and method for detecting axle number using the mutisensor unit - Google Patents

Parallel type mutisensor unit for detecting axle number System and method for detecting axle number using the mutisensor unit Download PDF

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Publication number
KR101718667B1
KR101718667B1 KR1020160104954A KR20160104954A KR101718667B1 KR 101718667 B1 KR101718667 B1 KR 101718667B1 KR 1020160104954 A KR1020160104954 A KR 1020160104954A KR 20160104954 A KR20160104954 A KR 20160104954A KR 101718667 B1 KR101718667 B1 KR 101718667B1
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South Korea
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sensor
piezo
unit
road
sensor unit
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KR1020160104954A
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Korean (ko)
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오주삼
정유석
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한국건설기술연구원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/021—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles having electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/022—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion
    • G01G19/024—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion using electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The present invention relates to a parallel type multi-sensor unit for detecting an axis, an installation method of the multi-sensor unit, an axis detection system having the multi-sensor unit, and a detection method. More particularly, the present invention relates to a parallel-type multi-sensor unit for detecting axes embedded in a road and sensing the pressure of the automobile passing on the road so as to obtain the number of vehicle axles of the automobile, A plurality of piezo sensor parts having a covering film covering the piezo film and spaced apart from each other by a predetermined distance in the depth direction; A sensor pedestal to which the plurality of piezo sensor units are mounted so that each of the plurality of piezo sensor units maintains the specific interval; And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, To a multi-sensor unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a multi-sensor unit for detecting a parallel-type shaft, an installation method of the multi-sensor unit, an axis detecting system having the multi-sensor unit and an axis detecting method. unit}

The present invention relates to a parallel type multi-sensor unit for detecting an axis, an installation method of the multi-sensor unit, an axis detection system having the multi-sensor unit, and an axis detection method.

As the number of vehicles increases with industrial development, sensors are installed on the roads for the purpose of determining the number of vehicles traveling on the roads, interrupting the overloaded vehicles, and the like. The piezo sensor is installed on the road and is a sensor that detects the pressure of the vehicle weight through the wheel as the vehicle passes.

Fig. 1 shows a state of use in a state in which the piezo sensor is embedded in the road, and Fig. 2 shows a perspective view of a conventional copper pipe covered piezo sensor. Fig. 3 shows a flow chart of a conventional method of manufacturing a piezo sensor. 4 is a cross-sectional view of a sensor portion of a conventional piezo sensor.

As shown in Fig. 1, a piezo sensor is embedded in a road and used. That is, after the groove is formed on the road, the piezo sensor 1 is embedded in the groove, so that the piezo sensor 1 is installed on the road. The piezoelectric sensor 1 buried in the road senses the pressure of an automobile wheel passing over it, and generates an electric signal. The generated electric signal is transmitted to a processing device (not shown) . On the basis of the received electric signal, the processing device (not shown) acquires information such as the type of the vehicle passing through the road, the traffic volume, and whether the vehicle is overloaded.

2, the conventional piezo sensor 1 includes a sensor unit 2 for converting a pressure of an automobile into an electric signal, a cable 6 for transmitting an electric signal generated in the sensor unit 2, An outer tube 3 connecting the cable 6 and the sensor unit 2 and a cap 4 mounted at the end of the sensor unit 2. [

As shown in FIG. 3, the method includes a step of winding the first piezoelectric film 12 in a spiral shape along the longitudinal direction on the surface of the conductor 11 (S1) The first piezoelectric film 12 wound on the surface is a polymeric ferroelectric material obtained by polarizing the uniaxially stretched film of vinylidene fluoride resin (PVDF) at a high voltage, and generates a current in accordance with the applied pressure.

Therefore, a current generated by the piezoelectric effect can stably flow through the conductor and the first piezoelectric film 12. The first piezoelectric film 12 is wound on the surface of the conductor, and the second piezoelectric film 13 is wound thereon again (S2). Next, the conductor 11 wound with the piezo films 12 and 13 is passed through the rollers to make the conductor 11 into a flat shape pressed up and down (S3). The conductor 11, the piezo films 12 and 13 and the metal tube 5 constitute the sensor part 2 in the piezo sensor 1. The sensor part 2 is formed in a flat shape in which the sensor part 2 is pushed up and down It corresponds to the pre-stage.

Then, the conductor 11 and the piezoelectric films 12 and 13 having a flat shape are inserted into the metal tube 5 (S4). The metal tube 5 is a metal tube surrounding the conductor 11 and the piezo films 12 and 13 to maintain the shape of the piezo sensor 1 and more specifically the shape of the sensor part 2, Thereby preventing the conductor 11 and the piezoelectric films 12 and 13 from being damaged.

Prior to the above step, the metallic tube 5 having a circular cross section is pressed up and down in advance so as to correspond to the shape of the flattened conductor 11 (S5) Since the conventional metal tube 5 has a circular section in cross section, the conductor 11 and the piezo films 12 and 13 can be easily inserted into the metal tube 5 by flattening the metal tube 5 to some extent in advance. .

Then, when the conductor 11 and the piezo films 12 and 13 are inserted into the metal tube 5 (S6), the metal tube 5 with the conductor 11 inserted therein is passed through the roller, And is made into a flat shape pressed up and down (S6). Therefore, the conventional sensor unit 2 has a flat shape pressed downward as shown in FIG.

When the sensor part 2 is formed to have a flat shape such that the width of the sensor part 2 is larger than the depth of the upper and lower parts, the piezo film and the metal tube 5 are brought into contact with each other in the upward direction, It is possible to obtain a C value (charge amount) that can obtain an ideal output voltage. Further, since the sensor unit 2 has a flat shape as a whole, the depth of grooves to be machined on the road can be reduced, so that damage to the road due to groove machining can be reduced, and groove machining can also be facilitated.

However, such conventional piezo sensors for AVC have two problems. It is expensive price and limited durability. The life span of the piezo sensor is not as short as 70 months on average, but breakage of the joint between the piezo cable and the lead cable and moisture penetration in the copper tube are pointed out as the main cause of breakage. In the case of the piezo part, since the piezo part plays a role in the rest even if it is damaged or broken, the piezoelectric type sensor of the piezo type has a very long potential life.

Also, the price is higher than the simple principle and the structure of the sensor, and the price is increased in the process of forming the part using the metal tube and the elliptical shape.

Ceramic type and PVDF type sensors are widely used as the vehicle axis detection sensors for classifying the vehicle types inside and outside. The problem is that the sensors used for Weigh-In-Motion (WIM) must measure shaft weights, but it is very important to acquire only the double vertical components to increase accuracy.

In order to simultaneously perform both the calculation of the axis number and the calculation of the axis weight, the shape of the axis detection sensor must be an ellipse or a tortoise rectangle shape as described above to obtain only the vertical component . In order to obtain such a vertical component only, as described above, it is necessary to add an expensive process to make the sensor square or elliptical.

However, such a shape is not an essential element for counting only the number of vehicle axes. In other words, parameters such as the number of axes, the distance between axes, and the length of a vehicle are usually used in the classification standard of the vehicle type. In this case, in order to grasp the quantity of the vehicle axle, judge only whether or not the voltage generated by the piezo sensor exceeds the threshold value . In the case of designing an axial sensor for such an application, there is no need to limit the shape to obtain only the vertical component of the vehicle wheel load.

Korea Patent Publication No. 2011-001837 Korean Patent No. 1472550

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an AVC (Automatic Vehicle Classification) A conventional synthetic resin coated piezo sensor is used instead of a metal tube covered piezo, which is an existing design part, and a junction part of a weak sensor such as a piezo sensor part and a lead cable is reinforced by a junction module, and a plurality of piezo sensors A multi-sensor unit for detecting parallel axes which is arranged so as to be spaced apart from each other by a predetermined distance in the depth direction of a road surface and which can continuously detect the number of axes even if one of the piezo sensor units is disconnected, And an object of the present invention is to provide an axis detection system and a detection method having the same.

According to an embodiment of the present invention, it is possible to achieve the object of detecting the axis of a vehicle even if two or more piezo sensor parts are connected in parallel to break a joint part of one piezo, and a conventional piezoelectric cable part is covered with an elliptic copper tube In order to save the cost of manufacturing, it is economical to apply general piezo-sensor part of synthetic resin material (Vinyl, Polyethylene, etc.) and various parts which can fix cable to a certain depth to secure workability, In addition, a multi-sensor unit for parallel-type shaft detection, in which a junction part capable of joining a plurality of strands of piezo sensor parts with a lead cable is designed and the inside of the junction part is filled with epoxy, acrylic or polyurethane resin to improve durability, An installation method of the multi-sensor unit, an axis detection system having the multi-sensor unit, and a detection method It is an object to the ball.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide a parallel type multi-sensor unit for detecting an axis of a vehicle embedded in a road and sensing the pressure of the automobile passing on the road to obtain the number of vehicle axles of the automobile, A plurality of piezo sensor parts having a piezo film surrounding an outer surface of a conductor and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction; A sensor pedestal to which the plurality of piezo sensor units are mounted so that each of the plurality of piezo sensor units maintains the specific interval; And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, As shown in Fig.

The sensor pedestal includes a body portion having a longitudinal direction parallel to the depth direction and a plurality of mounting portions spaced apart from each other at the specific interval in the body portion and each mounting the plurality of piezo sensor portions .

A second object of the present invention is to provide a parallel-type multi-sensor unit for detecting axes for sensing the pressure of a vehicle buried in a road and traveling on the road to obtain the number of vehicle axles of the vehicle, A plurality of piezo sensor parts having a piezo film surrounding an outer surface of a conductor and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction; A plurality of piezo-sensor portions provided between the plurality of piezo-sensor portions so as to maintain the specific intervals, and a plurality of piezo-sensor portions each having a sensor mounting end mounted on each of the plurality of piezo-sensor portions, A sensor frame having a module connection portion having a mounting end; And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, As shown in Fig.

A third object of the present invention is to provide a parallel-type multi-sensor unit for detecting axes for detecting the pressure of an automobile which is buried in a road and which travels on the road to obtain the number of vehicle axles of the automobile, A plurality of piezo sensor parts having a piezo film surrounding an outer surface of a conductor and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction; A mesh net frame provided with a mesh shape and a planar direction parallel to the depth direction and each of the plurality of piezo sensor portions being spaced apart by the predetermined interval; And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, As shown in Fig.

Each of the piezo sensor units may be fixedly inserted into the mesh network frame in a zigzag fashion or one side may be fixed to a specific position of the mesh net frame and the other side may be fixed to the mesh sensor frame using a fixing clip for mounting the piezo sensor unit, And each of the plurality of mesh network frames is fixed to the mesh network frame.

The coating layer may be formed of a synthetic resin.

Also, the inside of the junction module may be filled with an epoxy, acrylic, or polyurethane resin.

At least one of the plurality of piezo sensor units may be zigzag bent along a plane direction of the road surface.

 In addition, each of the two ends of at least one of the plurality of piezo sensor parts may be zigzagged along the plane direction of the road surface.

A fourth object of the present invention is to provide a method of installing a parallel-type multi-sensor unit for detecting axes for sensing the pressure of a vehicle buried in a road and traveling on the road to obtain the number of vehicle axles of the vehicle, Manufacturing a multi-sensor unit for parallel type axial sensing according to the first, second, and third objects; Cutting the road on which the multi-sensor unit for parallel detection is installed by a set depth; Installing the parallel type shaft sensing multi-sensor unit in the cutting space, and connecting the lead cable of the multi-sensor unit to the signal processing board; And filling the resin into the cutting space and restoring the road surface. The method for installing the multi-sensor unit for a parallel type shaft can be accomplished as follows.

A fifth object of the present invention is to provide a bearing detection system for detecting the quantity of the vehicle axle of the automobile by sensing the pressure of the automobile passing on the road, wherein the first, second and third objects embedded in the road A parallel type multi-sensor unit for detecting an axis; A module block connected to the lead cable of the parallel type shaft sensing multi-sensor unit, for summing measured values measured by the plurality of piezo sensor units and outputting a total voltage value; A first display unit for displaying a value output from the module block; And a determination unit that receives the output value and determines the number of axes. The multi-sensor unit for a parallel type shaft detection according to claim 1,

The apparatus may further include a plurality of filters for reducing the power source induced noise of the measured values in each of the plurality of piezo sensor units.

The first display unit may be turned on when the output value exceeds a set threshold value.

The display unit may further include a plurality of second display units flashed according to the measured values of the plurality of piezo sensor units.

And an amplifier for amplifying the value output from the module block and outputting the amplified value to the determination unit.

A sixth object of the present invention is to provide a method of detecting the quantity of the vehicle axle of the automobile by sensing the pressure of the automobile passing on the road using a sensor unit embedded in the road, Manufacturing a multi-sensor unit for detecting a parallel type shaft according to the second and third objects; The road on which the parallel type shaft detecting multi-sensor unit is to be installed is cut by a set depth, the parallel type shaft detecting multi-sensor unit is installed in the cutting space, the lead cable of the multi-sensor unit is connected to the signal processing board Filling the resin with the cutting space and restoring the road surface; Outputting a total voltage value by summing the measured values measured by the plurality of piezo sensor units, in a module block of the signal processing apparatus connected to the lead cable; Displaying a total voltage value output from the module block in a first display unit; And a determination step of determining the number of axles by receiving the total voltage value output from the determination unit.

The method may further include the step of causing each of the plurality of second display portions to blink according to each of the measured values of the plurality of piezo sensor portions.

And before the step of outputting the total voltage value, each of the plurality of filters further reducing the power supply induced noise of the measured value at each of the plurality of piezo sensor parts, wherein the displaying step and the determining step The amplifying unit may further amplify the value output from the module block and output the amplified value to the determining unit and the first display unit.

According to an embodiment of the present invention, a part of an AVC (Automatic Vehicle Classification) automobile classifier for collecting traffic information is installed on a road, A general synthetic resin coated piezo sensor is used instead of the piezo, and a junction between the piezo sensor part and the lead cable, which is a weak part, is reinforced through the junction module, and a plurality of piezo sensor parts are arranged so as to be spaced apart from each other by a predetermined distance in the depth direction of the road surface, Even when the sensor unit is disconnected, it is possible to continuously detect the number of the rollers.

According to an embodiment of the present invention, it is possible to achieve an object of detecting the axis of a vehicle even if two or more piezosensor parts are connected in parallel to break a joint part of one piezo, and the existing piezo cable part is covered with an elliptical copper tube In order to save the cost of manufacturing, it is economical to apply general piezo-sensor part of synthetic resin material (Vinyl, Polyethylene, etc.), and various parts that can fix the cable to a certain depth to secure workability are provided in various forms , And also has the advantage of improving the durability by designing a junction part capable of bonding a plurality of strands of piezo sensor parts with a lead cable and filling the junction part with epoxy, acrylic or polyurethane resin.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 shows a state of use in a state in which a piezo sensor is embedded in a road,
Fig. 2 is a perspective view of a conventional copper tube coated piezo sensor,
3 is a flowchart of a conventional method of manufacturing a piezo sensor,
4 is a cross-sectional view of a sensor portion of a conventional piezo sensor,
5 is a side view of a parallel type multi-sensor unit for detecting an axis according to a first embodiment of the present invention,
6 is a partial perspective view of a piezo sensor unit according to an embodiment of the present invention,
7A and 7B are side views of the sensor pedestal according to the first embodiment of the present invention,
8 is a perspective view of three piezo sensor units mounted on a sensor pedestal according to the first embodiment of the present invention,
Fig. 9A is a sectional view of the road pavement cut in a predetermined depth, Fig.
FIG. 9B is a sectional view of the sensor pedestal in a cutting space according to an embodiment of the present invention. FIG.
10 is a partial side view of three piezo sensor parts mounted on the frame module according to the second embodiment of the present invention,
11 is an exploded perspective view of a frame module according to a second embodiment of the present invention,
12 is a perspective view of a frame module according to a second embodiment of the present invention,
13A is a side view of a mesh net frame according to a third embodiment of the present invention,
FIG. 13B is a side view of the mesh net frame with three piezo sensor parts in FIG. 13A,
Fig. 13C is an enlarged view of a portion A in Fig. 13B,
FIG. 14A is a side view of a mesh net frame in which three piezo sensor units are mounted by a fixing clip according to a third embodiment of the present invention, FIG.
14B and 14C are perspective views of the fixing clip according to the embodiment of the present invention,
15A is a side view of an X-shaped mesh net frame equipped with three piezo sensor units according to a third embodiment of the present invention
Fig. 15B is an enlarged view of a portion B in Fig. 15A,
And FIG. 16B is a plan view of the piezo sensor unit according to another embodiment of the present invention,
FIG. 17 is a block diagram of a number detecting system using a multi-sensor unit for detecting a parallel type shaft according to an embodiment of the present invention;
18A is a graph showing signals of each of the first to third piezo sensor units according to an embodiment of the present invention,
18B is a graph showing an output value of a module block according to an embodiment of the present invention,
19 is a plan view of a signal processing board according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the configuration and functions of the parallel-type multi-sensor unit 100 according to the embodiment of the present invention will be described. 5 is a side view of the parallel-type multi-sensor unit 100 for detecting an axis according to the first embodiment of the present invention. 6 is a partial perspective view of the piezo sensor unit 10 according to the embodiment of the present invention. 7A and 7B are side views of the sensor pedestal 20 according to the first embodiment of the present invention. 8 is a perspective view of three piezo sensor units 10 mounted on a sensor pedestal 20 according to the first embodiment of the present invention.

5, the parallel-type multi-sensor unit 100 for detecting an axis according to the first embodiment of the present invention includes three piezo sensor units 10, a sensor pedestal 20, a junction module 50, a lead cable 60, and the like.

6, the piezo sensor unit 10 according to the embodiment of the present invention can be used in both general PVDF and polymer piezo systems. The sensor unit 10 includes a conductor 11 positioned in the core, a conductor 11 A first piezoelectric film 12 composed of a PVDF piezoelectric film tape or the like which surrounds the outer surface of the first piezoelectric film 12, a second piezoelectric film 13, and a coating layer 14 covering the outside. The coating layer 14 according to the embodiment of the present invention is made of a material of a general synthetic resin (vinyl, polyethylene, etc.) rather than a metal tube 5 unlike the conventional one.

The plurality of piezo sensor units 10 are arranged, fixed and installed at a predetermined distance from each other in the depth direction in the cutting space of the installed road. In the description of the present invention, it is described that the piezo sensor unit 10 is composed of three piezo sensors, but it may be composed of two piezo sensors or four or more piezo sensors.

As shown in FIGS. 5, 7A, 7B and 8, the sensor pedestal 20 according to the first embodiment of the present invention is configured such that each of the plurality of piezo sensor parts 10 is spaced apart from each other in the depth direction It is understood that a plurality of piezo sensor units 10 are mounted. These three piezo sensor units 10 are spaced apart from each other by 0.5 cm to 1 cm intervals by the sensor pedestal 20.

As shown in Figs. 7A, 7B and 8, the sensor base 20 according to the first embodiment of the present invention includes a main body 21 whose longitudinal direction is parallel to the depth direction, Are spaced apart from each other at a specific interval to form a plurality of mounting ends 22 for mounting the plurality of piezo sensor parts 10, respectively.

The junction module 50 is provided with a piezo sensor coupling end 51 to which the other end of each of the plurality of piezo sensor sections 10 is connected and a lead cable coupling end 52 to which the lead cable 60 is coupled . The interior of the junction module 50 may be filled with an epoxy, acrylic, or polyurethane resin to improve durability.

Hereinafter, a method of installing a parallel-type multi-sensor unit 100 for detecting a shaft of an automobile by detecting the pressure of a vehicle buried in the road and traveling on the road will be described.

First, the above-mentioned parallel type multi-sensor unit 100 for shaft detection is manufactured, and the road on which the multi-sensor unit for parallel detection 100 is to be mounted is cut by a set depth. FIG. 9A is a cross-sectional view showing a state where the road pavement is cut to a predetermined depth.

The above-mentioned parallel type multi-sensor unit 100 for axis detection is installed in the cutting space 7 and the lead cable 60 of the multi-sensor unit 100 is connected to the signal processing board 200. 9B is a sectional view of the sensor pedestal 20 in a cutting space according to an embodiment of the present invention. When the installation of the parallel type shaft detecting multi-sensor unit 100 is completed, the resin is filled in the cutting space and the road surface 8 is restored.

Hereinafter, the parallel type shaft sensing multi-sensor unit 100 according to the second and third embodiments of the present invention will be described. The parallel type multi-sensor unit 100 according to the second and third embodiments has basically the same configuration as that of the above-described first embodiment, but the sensor-cooked bed may be assembled in a module form (A third embodiment), and a mesh configuration (a third embodiment). 10A and 10B are partial side views of three piezo sensor parts 10 mounted on a sensor frame module according to a second embodiment of the present invention. 11 is an exploded perspective view of the sensor frame module according to the second embodiment of the present invention. 12 is a perspective view of a frame module according to a second embodiment of the present invention.

As shown in FIGS. 10A and 10B, the sensor frame 30 module according to the second embodiment of the present invention may be constructed by assembling the receiving unit 31 and the sensor module 35 as a whole. The sensor module 35 is provided with a sensor mounting end 33 to be mounted on each of the plurality of piezo sensor parts 10 and a mounting part mounting end 34 to which the receiving part 31 is assembled. The pedestal part 31 is mounted on the pedestal part mounting end 34 of the sensor module 35 and is provided between the plurality of piezo sensor parts 10 so that the plurality of piezo sensor parts 10 are kept at a specific interval .

A sensor module 35 for mounting the piezo sensor unit 10 with various lengths is connected without attaching the piezo sensor unit 10 to the sensor mounting unit 33 of the module connection unit 32, A plurality of sensor modules 35 may be assembled in the longitudinal direction and the piezo sensor unit 10 may be mounted on the sensor module 35. [

In the second embodiment, since the sensor frame 30 is formed in a module shape, the spacing between the individual piezo sensor portions 10 can be easily maintained while the spacing between the individual piezo sensor portions 10 is kept constant, and the pedestal 20 having various lengths can be assembled The interval between the piezo sensor units 10 can be maintained and the length of the sensor module 35 can be adjusted by connecting the sensor modules 35 in the longitudinal direction as shown in FIG.

Also, the sensor frame 30 according to the second embodiment of the present invention may be configured as shown in FIGS. 11 and 12. FIG. That is, the piezo sensor part 10 and the receiving part 31 can be assembled and fastened through the module connecting part 32. 11, the module connecting portion 32 includes a sensor mounting end 33 to which the piezo sensor unit 10 is fixed and a pedestal mounting end 34 to which the pedestal 31 can be assembled And the like.

13A is a side view of the mesh net frame 40 according to the third embodiment of the present invention. FIG. 13B is a side view of the mesh net frame 40 in which the three piezo sensor units 10 are mounted in FIG. 13A, and FIG. 13C is an enlarged view of a portion A in FIG. 13B.

According to the third embodiment of the present invention, a plurality of piezo sensor parts 10 can be fixedly installed at a predetermined interval in the depth direction by applying the mesh net frame 40. [ As shown in FIGS. 13B and 13C, it can be seen that each of the piezo sensor parts 10 can be fixed to a desired position by sandwiching the piezo sensor parts 10 in a zigzag manner in a mesh net frame 40 having a plurality of vertical lines and horizontal lines.

In addition, the plurality of piezo sensor parts 10 may be fixed to the mesh net frame 40 by using the fixing clip 41 in addition to the zigzag fitting method. 14A is a side view of a mesh net frame 40 in which three piezo sensor units 10 are mounted by a fixing clip 41 according to a third embodiment of the present invention. 14B and 14C are perspective views of the fixing clip 41 according to the embodiment of the present invention. 14B and 14C, one side of the fixing clip 41 is fixed at a specific position of the mesh net frame 40 and the other side of the fixing clip 41 is mounted with the piezo sensor part 10, The mesh network frame can be detachably attached to the mesh network frame.

15A is a side view of an X-shaped mesh net frame 40 equipped with three piezo sensor units 10 according to a third embodiment of the present invention, and FIG. 15B is a cross- Fig. As shown in FIGS. 15A and 15B, it can be seen that the present invention is also applicable to a form in which a mesh network is formed in an X-shape instead of a + shape.

16A and 16B show a top view of the piezo sensor unit 10 according to another embodiment of the present invention. As described above, the plurality of piezo sensor parts 10 are installed to be spaced apart from each other in the depth direction by applying various sensor pedestals 20, the module type sensor frame 30, the mesh net frame 40, 16A, it can be seen that at least one of the plurality of piezo sensor portions 10 may have a zigzag form along the plane direction of the road surface in order to increase the measurement sensitivity . More preferably, both end portions of the plurality of piezo sensor parts 10 through which the wheels of the vehicle pass are formed into a zigzag shape along the plane direction of the road surface, as shown in Fig. 16B .

Hereinafter, the configuration and function of the above-described number-of-axes detecting system using the multi-sensor unit 100 for detecting a parallel type of axes will be described. 17 is a block diagram of a number detecting system using a multi-sensor unit 100 for detecting a parallel type shaft according to an embodiment of the present invention.

18A is a graph showing signals of the first to third piezo sensor units 10 according to an embodiment of the present invention, and FIG. 18B is a graph showing a signal of each of the module blocks 230 Of FIG. 5A. 19 is a plan view of the signal processing board 200 according to an embodiment of the present invention.

17, it can be seen that the signal processing board 200 is connected to the lead cable 60 and the sensor input connector 211 of the above-mentioned parallel type multi-sensor unit 100 for axis detection .

The signal processing board 200 includes a plurality of filters 220 connected to the connection lines of the first to third piezo sensor units 10 and a module block 230, an amplification unit 240, an LED display unit 250, A power supply 260, and the like. 19, the sensor input connector, the three second LED display portions 252, the first LED display portion 251, the sensor output connector 212 (see FIG. 19), and the like are formed on the outer surface of the housing 210 of the signal processing board 200. [ ), And a power supply connector 213 are formed.

Each of the first to third piezo sensor units 10 outputs a voltage value of 400 to 500 mV under normal operation and outputs a voltage of 100 mV or less when it malfunctions. The high impedance of the piezo sensor unit 10 causes a 60 Hz power source induced noise of 100 mV or more, which increases the possibility of causing malfunction. Therefore, the signal processing board 200 according to an embodiment of the present invention includes the filter 220 and is configured to reduce the power induction noise of at most 60 Hz.

The module block 230 adds the output values of the three piezo sensor units 10 and outputs the total voltage value. Since the first to third piezo sensor units 10 are arranged in parallel as described above, the module block 230 can output an output signal even when one or two are disconnected.

18A, the voltage value output from the first piezo sensor unit 10-1 is y1, the voltage value output from the second piezo sensor unit 10-2 is y2, and the voltage value output from the third piezo sensor unit The output value of the module block 230 is Y1 = y1 + y2 + y3 when all three piezo sensor units 10 are normally operated.

When one of the piezo sensor units 10 is disconnected or malfunctioned, that is, when the third piezo sensor unit 10-3 is disconnected, the output value is Y2 = y1 + y2, and the second piezo sensor unit The output value is Y2 = y1 + y3, and when the first piezo sensor unit 10-1 is disconnected, the output value is Y2 = y2 + y3. When any one of the piezo sensor units 10 ), The output values are Y3 = y1, Y3 = y2, and Y3 = y3.

Therefore, if the set threshold value is smaller than Y3, it is possible to detect the number of axes even when only one of the piezo sensor units 10 is operated.

The amplification unit 240 amplifies the value output from the module block 230 and outputs the amplified value to the determination unit 250 and the determination unit 250. Then, the determination unit determines the number of axles by receiving the output value.

The LED display unit 250 may include a first LED display unit 251 and three second LED display units 252 and the first LED display unit 251 may display a value output from the module block 230. That is, the first LED display unit 251 is turned on when the output value exceeds the set threshold value.

The plurality of second LED display portions 252 are blinked according to the measured values of the first to third piezo sensor portions 10, respectively. That is, it is turned on when it is normally operated, and is turned off when it is malfunctioned.

Also, the power supply 260 is supplied with power from the power supply unit 270. Specifically, it receives 12 ~ 15V of AC220V adapter and supplies power to internal parts of internal electronic circuit. + 10V, -10V, + 5V power supply is required internally.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: Conventional piezo sensor
2:
3: outer tube
4: Cap
5: Metal tube
6: Cable
10: Piezo sensor part
11: Conductor
12: first piezo film
13: second piezo film
14:
20: Sensor stand
21:
22: Mounting stage
30: Sensor frame
31:
32: Module connection
33: Sensor mounting stage
34: Mounting end of base
35: Sensor module
40: Mesh frame
41: Fixing clip
50: junction module
51: Sensor coupling stage
52: Lead cable connection end
60: Lead cable
100: Multi-sensor unit for parallel type shaft detection
200: signal processing board
210: Housing
211: Connector for sensor input
212: Connector for sensor output
213: Power supply connector
220: Filter
230: Module block
240:
250: LED indicator
251: first LED display section
252: Second LED display part
260: Power supply
270: Power supply

Claims (18)

A multi-sensor unit for parallel type shaft detection for detecting a pressure of a vehicle that is buried in a road and travels on the road so as to obtain a quantity of a vehicle axis of the vehicle,
A plurality of piezo sensor parts having a conductor, a piezo film surrounding the outer surface of the conductor, and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction;
A sensor pedestal to which the plurality of piezo sensor units are mounted so that each of the plurality of piezo sensor units maintains the specific interval; And
And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side,
Wherein the sensor pedestal includes a main body portion whose longitudinal direction is parallel to the depth direction and a plurality of mounting ends which are spaced apart from each other at the specific interval in the main body portion and mount the respective ones of the plurality of piezo sensor portions,
Wherein at least one of the plurality of piezo sensor units has a shape bent in a zigzag shape along the plane direction of the road surface.
delete A multi-sensor unit for parallel type shaft detection for detecting a pressure of a vehicle that is buried in a road and travels on the road so as to obtain a quantity of a vehicle axis of the vehicle,
A plurality of piezo sensor parts having a conductor, a piezo film surrounding the outer surface of the conductor, and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction;
A plurality of piezo-sensor portions provided between the plurality of piezo-sensor portions so as to maintain the specific intervals, and a plurality of piezo-sensor portions each having a sensor mounting end mounted on each of the plurality of piezo-sensor portions, A sensor frame having a module connection portion having a mounting end; And
And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, Multi-sensor unit.
A multi-sensor unit for parallel type shaft detection for detecting a pressure of a vehicle that is buried in a road and travels on the road so as to obtain a quantity of a vehicle axis of the vehicle,
A plurality of piezo sensor parts having a conductor, a piezo film surrounding the outer surface of the conductor, and a coating layer covering the piezo film, the piezo sensor parts being spaced apart from each other by a predetermined distance in the depth direction;
A mesh net frame provided with a mesh shape and a planar direction parallel to the depth direction and each of the plurality of piezo sensor portions being spaced apart by the predetermined interval; And
And a junction module having a piezo sensor coupling end connected to one end of each of the plurality of piezo sensor parts on one side and a lead cable coupling end coupled with a lead cable on the other side, Multi-sensor unit.
5. The method of claim 4,
Each of the piezo sensor portions is inserted and fixed in a zigzag fashion in the mesh net frame, or
Wherein each of the piezo sensor units is fixed to the mesh net frame by using a fixing clip for fixing one side of the mesh net frame to a specific position and the other side for mounting the piezo sensor unit. .
The method of claim 1, 3, or 4,
Wherein the coating layer is made of a synthetic resin.
The method of claim 1, 3, or 4,
Wherein the interior of the junction module is filled with an epoxy, acryl or polyurethane resin.
The method according to claim 3 or 4,
Wherein at least one of the plurality of piezo sensor units has a shape bent in a zigzag shape along the plane direction of the road surface.
9. The method of claim 8,
Wherein at least one of the two ends of at least one of the plurality of piezo sensor units is bent in a zigzag shape along the plane direction of the road surface.
A method of installing a parallel-type multi-sensor unit for detecting axes for sensing the pressure of an automobile passing through the road on a road and acquiring a quantity of a vehicle axis of the automobile,
A method of manufacturing a multi-sensor unit for a parallel type shaft according to claim 1,
Cutting the road on which the multi-sensor unit for parallel detection is installed by a set depth;
Installing the parallel type shaft sensing multi-sensor unit in the cutting space, and connecting the lead cable of the multi-sensor unit to the signal processing board; And
And filling the cut space with the resin and restoring the road surface.
CLAIMS What is claimed is: 1. A bearing detection system for detecting a quantity of a vehicle axle of a vehicle by sensing pressure by an automobile passing on a road,
The multi-sensor unit for parallel shaft detection according to any one of claims 1, 3, and 4 embedded in the road.
A module block connected to the lead cable of the parallel type shaft sensing multi-sensor unit, for summing measured values measured by the plurality of piezo sensor units and outputting a total voltage value;
A first display unit for displaying a value output from the module block; And
And a determination unit that receives the output value and determines the number of axes.
12. The method of claim 11,
Further comprising a plurality of filters for reducing power source induced noise of the measured values at each of the plurality of piezo sensor units.
13. The method of claim 12,
Wherein the first display unit is turned on when the output value exceeds a set threshold value.
14. The method of claim 13,
Further comprising a plurality of second display portions that are flickered according to respective measured values of the plurality of piezo sensor portions.
15. The method of claim 14,
Further comprising an amplifying unit amplifying a value output from the module block and outputting the amplified value to the determining unit.
A method for detecting a quantity of a vehicle axle of a vehicle by sensing a pressure of an automobile passing on the road using a sensor unit embedded in the road,
A method of manufacturing a multi-sensor unit for a parallel type shaft according to claim 1,
The road on which the parallel type shaft detecting multi-sensor unit is to be installed is cut by a set depth, the parallel type shaft detecting multi-sensor unit is installed in the cutting space, the lead cable of the multi-sensor unit is connected to the signal processing board Filling the resin with the cutting space and restoring the road surface;
Outputting a total voltage value by summing measured values measured by the plurality of piezo sensor units, in a module block of the signal processing board connected to the lead cable;
Displaying a total voltage value output from the module block in a first display unit; And
And determining the number of axes by receiving the total voltage value output by the determination unit.
17. The method of claim 16,
Further comprising the step of causing each of the plurality of second display portions to blink according to each of the measured values of the plurality of piezo sensor portions.
18. The method of claim 17,
Further comprising the step of reducing power supply induced noise of each of the plurality of filters measured in each of the plurality of piezo sensor parts before outputting the total voltage value,
Wherein the step of displaying and the step of determining further comprise amplifying a value output from the module block by the amplification unit and outputting the amplified value to the determination unit and the first display unit. A method of detecting the number of bearings using a unit.
KR1020160104954A 2016-08-18 2016-08-18 Parallel type mutisensor unit for detecting axle number System and method for detecting axle number using the mutisensor unit KR101718667B1 (en)

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