KR20130098634A - Sensor pad system for weigher of axle with function of automatic measurement - Google Patents

Abstract

PURPOSE: A sensor pad system for a movable axle-load measuring device with an automatic measurement function is provided to reduce the weight of a sensor pad by using a strain gauge. CONSTITUTION: A sensor pad system for a movable axle-load measuring device with an automatic measurement function includes a sensor pad and a smart terminal (200). The sensor pad is composed of a body unit of a light metal material, a strain gauge (120), and a circuit unit (130). The body unit includes a dummy pad unit, one or more first receiving units, a second receiving unit, and a stopper. A resistance value of the strain gauge is changed by the deformation of the body unit. The circuit unit includes a resistance measuring unit which applies a fixed voltage to the strain gauge and receives and outputs a voltage change value in respect to the changeable resistance value; an amplifying unit (132) amplifying the voltage change value into a predetermined level; a filter unit (133) removing noise signals in the amplified voltage change value; a first communication unit (135) composed of an integrated delta-sigma A/D conversion unit (134) and a wireless communication module; a first control unit (136); and a power unit (150). [Reference numerals] (120) Strain gauge; (131) Resistance measuring unit; (132) Amplifying unit; (133) Filter unit; (134) Integral A/D conversion unit; (135) First communication unit; (136) First control unit; (150) Power unit; (210) Second communication unit; (220) Third communication unit; (230) Input unit; (240) Camera unit; (250) Unit for generating measured data; (260) Barcode generating unit; (270) Display unit; (280) Second control unit

Description

Sensor pad system for mobile axle with automatic measurement function {SENSOR PAD SYSTEM FOR WEIGHER OF AXLE WITH FUNCTION OF AUTOMATIC MEASUREMENT}

The present invention relates to a sensor pad system for a weight lifter. In detail, the weight of the sensor pad is greatly reduced by using a light metal body and a strain gauge, and an automatic measurement function for transmitting the measured weight information to a commercial smart terminal for processing. The present invention relates to a sensor pad system for a mobile accumulator.

When the road is overloaded, the load on the road is increased, which not only promotes cracking of the road and causes plastic deformation, but also shortens the life of the road. In addition, the risk of traffic accidents increase due to road damage, and a problem that requires a huge amount of time and cost for repair of the damaged road.

In particular, the overloading of large cargo vehicles has been pointed out as the main cause of road damage, and according to Article 4-1 of the Enforcement Decree prescribed by the Ministry of Construction and Transportation, the weight of the vehicle exceeds 10 tons or 40 tons in total "However, in consideration of the measuring instrument and measurement error, etc., the regulation may be allowed if the celebration and the total weight exceeds 10% (10%) of the above criteria).

In general, the effect of overloaded freight vehicle traffic on the paved road is 10t during celebration, which causes road damage such as 70,000 passenger cars, and 11t during celebration, road damage such as 110,000 passenger cars. In case of celebrating 15t, road damage such as passing 390,000 passenger cars is known to occur.

In addition, Article 39 of the Road Traffic Act stipulates that "the driver of all cars shall not ride, load, or drive a vehicle beyond the operational safety standards prescribed by Presidential Decree with respect to the number of passengers, loading weight and loading capacity." There are also crackdowns on vehicles that exceed weight. Vehicles exceeding the maximum load weight are not subject to the overload control standard, but are subject to crackdown to eliminate all risks and obstacles on the road including road damage. Can be.

In addition, cargo vehicles operated at construction sites established by law since 2009 are mandatory to measure the weight of cargoes with a monitoring system during celebrations, and to manage them through each local government.

In general, the axial weight of the vehicle is measured to identify the overload vehicle, and in the case of a mobile overload vehicle identification device implemented on a national road, the weight of each axle is used by using a plurality of sensor pads according to the number of vehicles in the stopped state of the vehicle. Measure at the same time, or measure one axis as the vehicle moves using a set of mobile sensor pads.

In this case, since the sensor pad is equipped with a load cell having a considerable weight and thickness, the sensor pad is not only large in size and weight, but also a time and effort for installation due to connection of various cables such as a power controller and communication line including a dedicated controller. It took quite a while.

In addition, in the existing excavators, the price of the sensor pad and the specialized dedicated controller connected to it was expensive, and it was a burden on the operation, and there were problems in legal effect and data storage and management due to weak security such as data loss and information change. In addition, since the system consisting of the weighing pad and the controller is specialized and lacks compatibility, real-time data management of the work is practically impossible.

The present invention was created to solve the above problems, an object of the present invention by using a light metal body and the strain gauge light weight sensor pad and at the same time to increase the accuracy and measured weight information to commercial smart terminal It is to provide a sensor pad system for a mobile accumulator with an automatic measurement function to transmit and process in real time.

In order to achieve the above object, the present invention provides a sensor pad system for a mobile accumulator having an automatic measurement function for measuring an axial weight of a vehicle and transmitting the measurement result to a smart terminal for processing. Dummy pad portion formed in the lower portion and one or more first storage portion formed at a predetermined depth in the lower center and the second storage portion formed inside the left or right side and a stopper protruding to help the tire of the vehicle is located in the upper center Receives a strain gauge attached to the body portion of the light metal material, the first housing portion and the resistance value changes according to the deformation of the body portion, applying a fixed voltage to the strain gauge and receiving a voltage change value for the resistance value changes Amplifying the resistance measuring unit and the voltage change value output from the resistance measuring unit to a predetermined level Amplifying unit, filter unit for removing the miscellaneous signal in the amplified voltage change value, delta sigma-integrated A / D conversion unit and wireless communication module for outputting the weight information obtained by converting the voltage change value from which the miscellaneous signal is removed to a digital signal. A first communication unit configured to control the first communication unit, the resistance measurement unit, the amplification unit, the filter unit, the A / D converter, and the first communication unit, and transmit the weight information output from the A / D converter through the first communication unit. A sensor pad including a control unit and a power supply unit supplying power to the first control unit, the sensor pad including a circuit unit accommodated in the second storage unit; A second communication unit that communicates with the first communication unit, a third communication unit connected to a designated wired or wireless communication network to transmit and receive signals and data, and measurement vehicle information and measurement time and place for a measurement vehicle and a driver from an administrator; The measurement unit information and time place information and signature inputted from the input unit together with an input unit for receiving time information and signature of the vehicle driver, a camera unit for taking a picture of the measured vehicle, and weight information transmitted from the first control unit. A measurement data generation unit which collects the pictures taken by the camera unit to generate measurement data, a barcode generation unit which generates a barcode including the generated measurement data, a display unit which outputs an image signal to an administrator, and Control the second communication unit, the third communication unit, the input unit, the camera unit, the measurement data generation unit, the barcode generation unit, and the display unit. Smart terminal comprising a signal and data processing to convert the measured data and bar code through the output to generate the display image signal to a second controller for sending through the third control unit; . ≪ / RTI >

In this case, a fourth communication unit capable of transmitting and receiving signals and data with the third communication unit and accessing an external communication network, a database storing measurement data and barcodes received through the fourth communication unit, and measurement data and barcodes received from the fourth communication unit And an authentication data generation unit for generating authentication data for storage, and a third control unit for controlling the fourth communication unit, the database, and the authentication data generation unit, and transmitting the generated authentication data to the related authority through the fourth communication unit. Management server; As shown in FIG.

In addition, the body portion is formed on one side of the outside further includes a temperature sensor unit for measuring the temperature of the atmosphere, the circuit unit memory portion stored the resistance change value of the strain gauge against the temperature change, and the temperature measured by the temperature sensor unit The apparatus may further include a compensator configured to read the resistance change value of the strain gauge with respect to the memory unit and correct the voltage change value output from the resistance measuring unit by the resistance change value.

The circuit unit may include an interrupt unit for outputting a signal by an external operation, and a power source between the power unit and the first control unit when there is no output of the A / D converter for a predetermined time connected to the power unit and the A / D converter. The control unit may further include a power saving operation unit for shutting off and connecting power between the power supply unit and the first control unit according to the signal of the interrupt unit.

The power supply unit may include a battery charged from an external power source, a voltage measuring unit measuring the voltage of the battery at all times, and a power supply that cuts off the connection of the battery when the voltage measured by the voltage measuring unit is less than or equal to a set lower limit. It may include a protection.

In addition, the body portion is provided on the outside and further comprises an output unit for outputting a signal that can be recognized by the administrator in accordance with the operation signal input, the circuit unit detects the voltage change value output from the resistance measuring unit more than the set value If it is maintained for more than the set time may further include a positioning unit for inputting the operation signal to the output unit.

In the present invention, by using a strain gauge instead of a conventional load cell, the weight of the sensor pad is reduced by 20% compared to the existing product, and the thickness of the sensor pad is also reduced by about 30% compared to the existing pad, thereby greatly improving the movement and transportability.

In addition, strain gages and specialized circuits for controlling them can compensate for changes in resistance values due to temperature changes, or position the wheels of a vehicle to perform more precise measurements.Weight information generated from sensor pads Is delivered to the smart terminal wirelessly and is processed, allowing for convenient installation and quick work.

In addition, by using a widely-used personal portable smart terminal instead of the existing specialized dedicated controller, not only can greatly reduce the cost for system construction, but also it is easy to use and various advanced functions can be efficiently measured and managed. . At this time, the work procedure and measurement data performed by using the smart terminal can be carried out quickly and accurately real-time management, such as generating a detailed analysis data by transmitting the relevant data to the dedicated management server.

1 is a perspective view showing a sensor pad according to a preferred embodiment of the present invention;
2 is a side view showing a sensor pad according to a preferred embodiment of the present invention;
3 is an operation view showing a state in which the wheel of the vehicle is located on top of the sensor pad of the present invention,
Figure 4 is a front view showing the state of the sensor pad caused plastic deformation due to the wheel of the vehicle,
5 is a block diagram showing an example of an delta sigma integrated A / D conversion unit;
6 is a block diagram showing a connection relationship between components according to the first embodiment of the present invention;
7 is a block diagram showing a connection relationship between components according to a second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the sensor pad system for a mobile accumulator with an automatic measurement function of the present invention.

The sensor pad system for a mobile accumulator with an automatic measurement function according to the first embodiment of the present invention comprises a sensor pad for measuring the weight of a vehicle and a smart terminal for receiving and processing the measurement result of the sensor pad.

1 is a perspective view showing a sensor pad according to a preferred embodiment of the present invention, Figure 2 is a side view showing a sensor pad according to a preferred embodiment of the present invention, showing the appearance of the sensor pad.

The sensor pad 100 includes a light metal body 110, a strain gauge 120, and a circuit 130. More preferably, the body portion 110 is made of aluminum or an alloy thereof, which is light in weight but has sufficient strength for measuring the axial weight of the vehicle.

In addition, the body portion 110 is a dummy pad portion 111 is formed in the front and rear direction with respect to the moving direction of the vehicle. The dummy pad part 111 forms an inclination of about 20 to 30 degrees from the ground to the top of the body part 110 or forms a small jaw so that the wheels of the vehicle are moved as the vehicle moves from the front side to the rear side. Help to climb up and down (100).

At least one first receiving part 112 formed at a depth of about 5 millimeters is formed at the lower central part of the body part 110. The first housing 112 is formed in an even number in the configuration for the installation of the strain gauge 120.

In general, the strain gauge 120 is composed of four pairs of eight, but may be composed of two or four. In FIG. 1, the strain gauge 120 is installed in four pairs.

A second housing 113 for accommodating the circuit unit 130 is formed in the left side or the right side of the body 110. At this time, the second housing 113 is formed in the outward direction in which the wheels of the vehicle are positioned in a state where the vehicle is mounted on the body portion 110 so that an administrator can access even if the wheels of the vehicle are located above the body portion 110. It is desirable to be able to.

The stopper 114 protrudes from the upper portion of the body 110 to help the wheel of the vehicle be positioned at the center. 3 is an operation view showing the wheel of the vehicle is located on top of the sensor pad of the present invention, the stopper 114, as shown in Figure 3 is the wheel of the measurement vehicle is located on the upper portion of the body portion 110 At this time, the wheel of the vehicle is projected to the front and rear with respect to the moving direction of the vehicle in a configuration that helps the wheel of the vehicle to be located in the upper center of the first housing 112, the strain gauge 120 is installed for accurate weighing . That is, between the stopper 114 protruding from the front and the rear, respectively, the recessed shape is such that the wheels of the vehicle are positioned between the two stoppers 114. At this time, the height of the stopper 114 is preferably formed to a height such that the driver of the vehicle can detect that the wheel of the vehicle exceeds the stopper 114. This allows the driver to recognize through the sense that the wheel of the vehicle is located between the two stoppers (114).

 The first gauge 112 is attached to the strain gauge 120 is a resistance value changes according to the deformation of the body portion 110 generated as the wheel of the vehicle is raised.

The strain gauge 120 is a sensor in which the electrical resistance varies in proportion to the physical change amount of the body part 110 according to the weight applied to the wheel of the vehicle. The material is of high variation, and its shape may be composed of metal microfine wires, or metal foils and ceramics arranged in a lattice manner.

The strain gage 120 used in the present patent has a resistance value of 1,000 Ω, and an amplifier having a low offset voltage and a temperature drift characteristic of a small amount of change due to an external environment change to effectively measure a small signal change occurring. You will use a standard voltage reference device with good accuracy.

Figure 4 is a front view showing the appearance of the plastic deformation sensor pad due to the wheel of the vehicle, plastic deformation occurs in the aluminum sensor pad when the wheel of the vehicle is located on the top of the sensor pad 100. The size of the plastic deformation is proportional to the weight of the truck. The resistance change of the strain gauge 120 with respect to the weight is converted into a digital signal through the circuit unit 130 and transmitted to the smart terminal 200 wirelessly. .

6 is a block diagram showing a connection relationship between components according to the first embodiment of the present invention, wherein the circuit unit 130 includes a resistance measuring unit 131, an amplifier 132, a filter unit 133, The A / D conversion unit 134, the first communication unit 135, the first control unit 136, and the power supply unit 150 are provided.

The resistance measuring unit 131 applies a fixed voltage to the strain gauge 120 and receives and outputs a voltage change value with respect to the resistance value of the strain gauge 120 that changes according to shape deformation. In this case, in order to reduce the influence of disturbance, it is preferable to use a method of measuring voltage about several times per second and calculating and outputting the average of the measured voltage values.

The amplifying unit 132 is an amplifying circuit for amplifying the voltage change value output from the resistance measuring unit 131 to a predetermined level. Since the voltage change value generated from the resistance measuring unit 131 is minute, the signal is minute. It will be amplified to an intensity suitable for signal transmission and processing.

The filter unit 133 is a filter circuit for removing a job signal in the amplified voltage change value, and performs a function of removing the job signal by passing a predetermined region of the voltage change value amplified by the amplifying unit 132. In this case, it is preferable that the filter circuit uses a band pass filter having a characteristic of easily passing only one frequency region. The band pass filter has two cutoff frequencies, the upper limit and the lower limit of frequencies that are easy to pass, and remove the noise by passing through the middle region frequency.

 The A / D converter 134 is a delta sigma integrated A / D converter and outputs weight information obtained by converting a voltage change value from which a miscellaneous signal is removed into a digital signal.

FIG. 5 is a block diagram showing an example of an delta sigma integrated A / D conversion unit, wherein delta-sigma modulation (ΔΣ) is analog-to-digital or digital-to derived from delta modulation. The analog conversion method enables easy implementation of low cost CMOS processes in analog-to-digital converter (ADC) or digital-to-analog converter (DAC) circuits. The principle of the sigma-delta structure is to roughly predict the value of the signal, find the error, and then correct the error using the accumulated error. According to this principle, if the cumulative error value is finite, the average value of the input signal and the average value of the output signal are equal. The number of integrators (or feedback loops) determines the order of the ΔΣ-modulator, and it is possible to obtain a higher precision signal than other methods.

The first communication unit 135 is a configuration for transmitting a signal or data with the smart terminal 200, it is preferable that made of a Bluetooth or Wi-Fi wireless communication module which is a communication standard applied to the general smart terminal 200. Depending on the different communication standards may apply.

The first controller 136 is configured to control the resistance measuring unit 131, the amplifier 132, the filter unit 133, the A / D converter 134, and the first communication unit 135. The weight information output from the A / D converter 134 is transmitted through the first communication unit 135.

The power supply unit 150 may be configured to supply power to the first control unit 136 by supplying power by connecting a power cable from the outside, but the sensor pad 100 of the present invention is installed around a road outdoors. Given this, it is preferable to be configured to supply power through a charged battery without a separate cable connection.

The smart terminal 200 is a generic term for a widespread personal portable smartphone, smart pad, etc. The second communication unit 210, the third communication unit 220, the input unit 230, the camera unit 240 And a measurement data generation unit 250, a barcode generation unit 260, a display unit 270, and a second control unit 280.

The second communication unit 210 is configured to exchange signals or data with the first communication unit 135 through wireless communication, and is made of the same Bluetooth or Wi-Fi communication module as the first communication unit 135.

The third communication unit 220 is connected to a specified wired or wireless communication network except for Bluetooth or Wi-Fi communication standards and transmits and receives signals and data. The third communication unit 220 may be connected to a wired communication network such as the Internet or an intranet, but the sensor Since the pad is installed in a place where wired communication networks are troublesome, such as a checkpoint of a national road where trucks frequently travel, it is preferable to use 3G and 4G, which are CDMA networks, which are easy to use, without using a separate communication network. It is also possible to transmit data to a mobile phone such as a driver.

The input unit 230 refers to a keypad or a touch pad of the smart terminal 200, and directly measures the vehicle information of the measurement vehicle and the driver, the time and place information of the measurement date and time, and the signature of the vehicle driver from the administrator. Get input.

The camera unit 240 is a small camera embedded in the smart terminal 200 is used as a reference material by taking a picture of the weight of the vehicle to be weighed, or by taking a picture of the weight being measured to leave as evidence of the measurement work.

The measurement data generation unit 250 may include a weight signal transmitted from the first control unit 136 through the first communication unit 135, measurement vehicle information, time place information and signature, input from the input unit 230, The measurement data is generated by collecting the pictures taken by the camera unit 240. At this time, the operation of calculating the axial weight using the weight information is also performed. In general, the weight information is proportional to the axial weight, and there are various methods for calculating the weight according to the type of the sensor. Thus, the weight signal is converted into the weight value in kg using a suitable method.

As a result, the measurement data includes contents included in documents issued after the existing weighing operation, and includes the result of overload discrimination on the measured weighing weight.

The barcode generation unit 260 is a part for generating a QR code containing information about the measurement data made through the measurement data generation unit 250. The QR code can record up to 7,089 characters, up to 4,296 characters, and up to 1,817 Chinese characters through a two-dimensional configuration using horizontal and vertical characters. Since map information, business card information, and the like may be contained, the measurement data information may be included in all. Afterwards, if the weighing results are transmitted to the airlines and related agencies in the form of bar codes, the person in charge can quickly and accurately check the measurement data by scanning the generated bar codes.

The display unit 270 outputs an image signal that can be visually checked by an administrator and corresponds to a screen unit of the smart terminal 200. The administrator may check various information input through the input unit 230 through the display unit 270, as well as photographs, measurement data, and generated barcodes.

The second control unit 280 is the second communication unit 210, the third communication unit 220, the input unit 230, the camera unit 240, the measurement data generation unit 250, the display unit ( 270 may be referred to as a CPU portion of the smart terminal 200. In addition, various signals and data processing processes are converted into image signals and output through the display unit, and the measurement data generated by the measurement data generation unit 250 and the barcode generated by the barcode generation unit 260 are generated. The third communication unit 220 performs a function of transmitting to the vehicle driver's mobile phone or related organizations.

As described above, the axial weight measurement operation of the vehicle is performed through the system consisting of the sensor pad 100 and the smart terminal 200 only, and the result of the driver and the relationship through the third communication unit 220 of the smart terminal 200. Although it can be sent directly to the institution, but a plurality of sensor pads 100 and smart terminal 200 to be managed are provided sporadic measurement work in several places, the management server for real-time management of the measurement work ( 300) is required.

In addition, the configuration of the management server 300 is a work load in that it does not have to proceed to follow-up work such as a separate document preparation by systematically managing the measurement data generated at various times in the various places where the sensor pad 100 is installed It may be a realistic alternative to reduce the risk.

7 is a block diagram showing the connection relationship between the configuration according to a second embodiment of the present invention, by transmitting the measurement results made through the sensor pad 100 and the smart terminal 200 in the field to the management server 300 management In addition, an additional configuration is added to correct the resistance change value of the strain gauge 120 due to the change in the temperature of the atmosphere and to help the power management of the sensor pad 100 to be efficiently performed.

First, the management server 300 is a configuration for managing the measurement data transmitted from the smart terminal 200 at a remote location, and generates authentication data and sends it to the related organizations, the fourth communication unit 310, the database 320 And the authorization data generation unit 330 and the third control unit 340.

The fourth communication unit 310 is connected to the third communication unit 220 using a wired or wireless communication network in a manner of transmitting and receiving signals and data with the third communication unit 220. In addition to the smart terminal 200, the fourth communication unit 310 may communicate with a mobile phone as well as a related agency such as an operator, a public office, and the like that perform a weighing measurement connected to a wired / wireless network. If the third communication unit 220 uses a commercial mobile phone communication network, the fourth communication unit 310 will be configured to connect to a commercial mobile phone communication network in the same manner, and at this time, it is possible to transmit data to related organizations through the mobile communication network. have.

The database 320 is a configuration for storing the measurement data and the bar code transmitted by the smart terminal 200 received through the fourth communication unit 310, all the measurement data according to the axial weight measurement of the vehicle made at various places Since is stored, the relevant government offices and related organizations can easily manage the management of the axial weight measurement results of the vehicle by connecting to the management server (300).

The authorization data generation unit 330 is configured to generate the authentication data of the document role to prove to the driver and the responsible company of the vehicle according to the result of the axial weight measurement operation. This is generated by processing the measurement data and bar code transmitted from the smart terminal, so that the relevant institutions can verify and store it so that later measurement results can be verified.

The third controller 340 is configured to correspond to the CPU of the management server 300, and controls the fourth communication unit 310, the database 320, and the authorization data generation unit 330 to generate the authentication data. The fourth communication unit 310 performs the function of transmitting to the driver's mobile phone or related organizations.

At this time, it is not necessary to create or keep the document data of a separate paper through the authentication data sent out. However, if necessary, the authentication data can be configured to be automatically generated by mail, fax, or mail and delivered to related organizations. This revolutionary shift in work will help to save convenience and accuracy, cost and time for weighing weighing.

In the case of the strain gauge 120, since the resistance change according to the change in shape is used, the expansion and contraction according to the temperature affects the measurement result. To this end, the temperature sensor unit 115 for measuring the temperature of the atmosphere is installed outside the body portion 110, the circuit unit 130 is the characteristic information of the resistance change value of the strain gauge 120 according to the temperature change The memory unit 137 and the compensation unit 138 for correcting the resistance voltage change value output from the resistance measuring unit by reading the resistance change value corresponding to the atmospheric temperature measured by the temperature sensor unit 115 is stored. ) Will be included. That is, the first control unit 136 corrects the voltage change value output from the resistance measuring unit 131 to the voltage change value to which the resistance change value according to temperature is applied through the compensation unit 138. Send through (135).

In addition, in consideration of the fact that the sensor pad 100 is installed outdoors and takes a setting time for the axial weight measurement operation, the power management is effective, and the power is exhausted during the axial weight measurement operation. To prevent this, the circuit unit 130 may further include an interrupt unit 139 and a power saving operation unit 140.

The interrupt unit 139 is a kind of switch circuit that generates a signal according to an input of a manager or an input of a specific signal.

The power saving operation unit 140 is installed between the power supply unit 150 and the first control unit 136 to serve to connect or cut off the power supplied to the first power supply unit 150, the A / D conversion It operates by detecting the output of the unit 134 and the interrupt unit. That is, when there is no output of the A / D conversion unit 134 for a set time (typically 30 minutes), the power is cut off between the power supply unit 150 and the first control unit 136, and the signal of the interrupt unit 139 As a result, the operation of reconnecting power between the power supply unit 150 and the first control unit 136 is performed.

In addition, the power supply unit may include a battery 151, a voltage measuring unit 152, and a power protection unit 153 for stable power supply.

The battery 151 is a rechargeable battery that is charged from an external power source and supplies power, and the voltage measuring unit 152 measures the voltage of the battery 151 at all times. In particular, the battery 151 is being charged and supplied with power. Measure the voltage during discharge.

The power protection unit 153 is a protection circuit for protecting the battery 151. When the voltage measured by the voltage measuring unit 152 is less than the set lower limit, the connection of the battery 151 is prevented to prevent over discharge. When the measured voltage is greater than or equal to the set upper limit value, the contact with the battery 151 is blocked to prevent overcharging, thereby increasing the life of the battery 151 and making efficient management.

In addition, in order to obtain an accurate measurement value, the wheel of the vehicle should be located in the center of the body portion 110 in which the strain gauge 120 is located. To this end, even if the stopper 114 is present, it is preferable to add a configuration that can confirm the position of the wheel to easily check the state in which the tire seated in place.

To this end, the output unit 141 for outputting a signal that can be recognized by the administrator in accordance with the operation signal input is provided on the outside of the body portion 110. In this case, the signal that can be recognized by the manager may be a normal time signal or an audio signal or a signal in which time and hearing are combined. The output unit 141 may be configured by applying a lamp, a buzzer, or both together.

In addition, the circuit unit 130 detects the voltage change value output from the resistance measuring unit 131, and if the value of more than the set value is maintained for more than the set time, the positioning unit for inputting the operation signal to the output unit 141 142. The voltage change value output from the resistance measuring unit 131 is an analog value, and as the tire moves away from the center of the body unit 110, the signal strength may decrease slightly as the tire is moved away from the strain gauge 120. In order to prevent this, a reference value (for example, 70% of the maximum value) of the maximum value of the voltage change value output from the resistance measuring unit 131 is set. Is determined to be located in the center and the manager through the output unit 141 to recognize this. At this time, since the reference value is different depending on the axial weight of the vehicle, it may vary every measurement, and is set with reference to the existing axial weight data.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

100: sensor pad 110: body portion
111: dummy pad portion 112: first storage portion
113: second storage portion 114: stopper
115: temperature sensor 120: strain gauge
130: circuit unit 131: resistance measurement unit
132: amplifier section 133: filter section
134: A / D conversion unit 135: the first communication unit
136: first control unit 137: memory unit
138: compensation unit 139: interrupt unit
140: power saving operation unit 141: output unit
142: positioning unit 150: power unit
151: battery 152: voltage measuring unit
153: power protection unit 200: smart terminal
210: second communication unit 220: third communication unit
230: input unit 240: camera unit
250: measurement data generation unit 260: barcode generation unit
270: display unit 280: second control unit
300: management server 310: fourth communication unit
320: database 330: authentication data generation unit
340: third control unit

Claims (6)

In the sensor pad system for a mobile accumulator with a built-in automatic measurement function that measures the weight of the vehicle and transmits the measurement result to the smart terminal for processing.
The dummy pad part 111 formed in the front-rear direction along the moving direction of the vehicle, the at least one first storage part 112 formed at a predetermined depth in the lower center, and the second storage part 113 formed inside the left or right side; In order to help the tire of the vehicle to be located in the upper center, a light metal body part 110 having a protruding stopper 114 is formed, and attached to the first storage part 112 to prevent deformation of the body part 110. According to the strain gauge 120, the resistance value is changed, the resistance measuring unit 131 and the resistance measuring unit for applying a fixed voltage to the strain gauge 120 and receiving and outputting a voltage change value for the changing resistance value. An amplifying unit 132 for amplifying the voltage change value output from the 131 to a predetermined level; Delta to output weight information Integral A / D conversion unit 134 and a first communication unit 135 consisting of a wireless communication module, the resistance measurement unit 131, the amplifier 132, the filter unit 133 and A / D conversion The first control unit 136 and the first control unit 134 and the first communication unit 135 and transmits the weight information output from the A / D conversion unit 134 through the first communication unit 135 A sensor pad 100 including a power supply unit 150 for supplying power to the control unit 136 and configured of a circuit unit 130 accommodated in the second storage unit 113;
The second communication unit 210 for communicating with the first communication unit 135, the third communication unit 220 connected to a designated wired or wireless communication network to transmit and receive signals and data, and from the manager to the measurement vehicle and driver The input unit 230 receives the measurement vehicle information, the time and place information on the measurement date and time, and the signature of the vehicle driver, the camera unit 240 for taking a picture of the measurement vehicle, and the first control unit 136. Measurement data generation unit 250 for generating measurement data by collecting the measured vehicle information, the time and place information and the signature and the photograph taken by the camera unit 240, together with the weight information, and the generation; Bar code generation unit 260 for generating a bar code including the measured data, the display unit 270 for outputting an image signal to the administrator, the second communication unit 210, the third communication unit 220 and the input unit 230 ) And camera unit 240 It controls the data generator 250, the barcode generator 260 and the display unit 270, converts the signal and data processing process into an image signal and outputs it through the display unit 270 to generate the measured data and barcodes A smart terminal 200 including a second controller 280 which is transmitted through the third controller 340; Sensor pad system for a mobile axle with built-in automatic measurement function, characterized in that consisting of.
The method of claim 1,
A fourth communication unit 310 capable of transmitting and receiving signals and data to and from the third communication unit 220 and accessing an external communication network, a database 320 storing measurement data and barcodes received through the fourth communication unit 310; Authorization data generation unit 330 for processing the measurement data and barcode received from the fourth communication unit 310 to generate the authentication data for storage, the fourth communication unit 310 and the database 320 and the authentication data generation unit A management server 300 which controls the 330 and comprises a third control unit 340 which transmits the generated authentication data to the related organization through the fourth communication unit 310; Sensor pad system for a mobile accumulator with an automatic measurement function further comprising a.
The method of claim 1,
The body portion 110 further includes a temperature sensor unit 115 formed on one side of the outside to measure the temperature of the atmosphere,
The circuit unit 130 stores the resistance change value of the strain gauge with respect to the temperature change and the memory change value of the strain gauge with respect to the temperature measured by the temperature sensor unit 115. The sensor pad system having a built-in automatic measurement function, characterized in that it further comprises a compensation unit (138) to read in the) and corrects the voltage change value output from the resistance measuring unit (131) by the resistance change value.
The method of claim 1,
The circuit unit 130 is connected to the interrupt unit 139 for outputting a signal by an external operation and the power supply unit 150 and the A / D conversion unit 134 for more than a predetermined time for the A / D conversion unit 134. If there is no output, cut off the power between the power supply 150 and the first control unit 136 and connect the power between the power supply 150 and the first control unit 136 according to the signal of the interrupt unit 139. The sensor pad system for a mobile accumulator with an automatic measurement function further comprising a power saving operation unit.
The method of claim 1,
The power supply unit 150 includes a battery 151 charged from an external power source, a voltage measuring unit 152 for constantly measuring the voltage of the battery 151, and a lower limit value at which the voltage measured by the voltage measuring unit 152 is set. A sensor pad system for a mobile accumulator with an automatic measurement function, characterized in that it comprises a power protection unit (153) for blocking the connection of the battery when less than or above the set upper limit.
The method of claim 1,
The body portion 110 further includes an output unit 141 which is installed on the outside and outputs a signal that can be recognized by the administrator according to the operation signal input,
The circuit unit 130 detects the voltage change value output from the resistance measuring unit 131 and, when a value equal to or greater than a set value is maintained for a predetermined time or more, the positioning unit 142 for inputting an operation signal to the output unit 141. Sensor pad system for a mobile axle with built-in automatic measurement function characterized in that it further comprises a).

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