WO2017115894A1

WO2017115894A1 - Data display apparatus and method

Info

Publication number: WO2017115894A1
Application number: PCT/KR2015/014559
Authority: WO
Inventors: Neelamegan P; Balasubramaniyan S
Original assignee: Volvo Construction Equipment Ab
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-07-06

Abstract

The present disclosure provides a data display apparatus and method, and a data display system. In an embodiment, the present disclosure provides an apparatus for displaying data, which is input with pressure, speed and the like of the machine through a switch signal and a sensor, and monitors and displays segmented output data including GPS hour according to vibration and propulsion of the machine, vibration high amplitude hour, vibration low amplitude hour, the number of times of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA), duty cycle, and the like, without manual intervention during vibration and propulsion of the machine, and a display method thereof.

Description

DATA DISPLAY APPARATUS AND METHOD

The present disclosure relates to an apparatus and method for displaying data, and more particularly, to such an apparatus and method for displaying data, which can monitor and display input data and output data used in a field test for design validation of a machine and a system.

Various kinds of machines and systems perform field tests for validation of stability and performance of designed machines or systems before the production thereof. One of the field test, Reliability Growth (RG) test is generally carried out in a remote side, and data obtained as a result of carrying out the Reliability Growth (RG) test is a critical basis for the design validation of the system. Thus, it is very important to monitor data that is input and output during the reliability growth test, calculate accurate data, and detect and display an error of the input and output data in order to prevent the production of defective products.

A technology for data monitoring and displaying used in the conventional field test is disclosed in Korean Patent Publication No. 10-2014-0091407. However, in the conventional technology, the hour meter that is driven by an alternator signal almost records only an actual running time of the engine. The actual running time of the engine which is recorded by the conventional technology is a simple engine running time in which the operation state of the machine is not taken into consideration, and thus it is difficult to acquire accurate measurement data with respect to the time record or traveling distance of the machine according to the propulsion and vibration states of the machine.

In addition, conventionally, there is no technology for automatically detecting an erroneous data through a monitoring device after monitoring test data. For this reason, a person in charge of test suffers from an inconvenience of having to manually record input and output data or detect the erroneous operation data. In fact, the manual operation has a relatively high failure possibility, and as a result, failures that were not observed during the RG test may be reported from the field after Start of Production (SOP) of the machine and system.

In particular, in the case where the reliability growth test is carried out on a heavy machine such as a compactor which requires the sensitive adjustment of the propulsion and vibration state of the machine, a technology does not exist which detects segmented input and output data including an amplitude, the number of times of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA), etc., which are sensed during the propulsion and vibration of the compactor. For this reason, there may be a high possibility that the heavy machine will be erroneously operated.

Therefore, there is a need for a technology which monitors and displays accurate test data (e.g., vibration at high amplitude (VHA), vibration at low amplitude (VLA), and the number of times of conversion between VHA and VLA) by further segmenting the input and output data at the time of carrying out the validation test of the heavy machine such as the compactor.

There is no technology for automatically detecting an erroneous data through a monitoring device after monitoring test data. For this reason, a person in charge of test suffers from an inconvenience of having to manually record input and output data or detect the erroneous operation data. In fact, the manual operation has a relatively high failure possibility, and as a result, failures that were not observed during the RG test may be reported from the field after Start of Production (SOP) of the machine and system.

Accordingly, the present disclosure has been made based on the technical background as described above, and it is an object of the present disclosure to provide an apparatus and method for display data, which can detect data error. In particular, the object of the present disclosure is to provide an apparatus for displaying data, which is input with pressure, speed and the like of the machine through a switch signal and a sensor, and monitors and displays segmented output data including GPS hour according to vibration and propulsion of the machine, vibration high amplitude hour, vibration low amplitude hour, the number of times of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA), duty cycle, and the like, without manual intervention during vibration and propulsion of the machine, and a display method thereof.

To achieve the above object, according to one aspect of the present disclosure, there provides a data display apparatus, including:

a sensing module for sensing a propulsion state of a construction machine using a real-time global positioning system (GPS) signal, and sensing a vibration state including vibration at high amplitude (VHA) and vibration at low amplitude (VLA) using a pressure switch signal and pressure and vibration data sensed by a pressure sensor if the machine is under propulsion;

a calculation module for calculating output data including GPS hour, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between VHA and VLA based on pressure, vibration, position and switch signal data recorded in a database in real time if it is sensed that the machine is under propulsion and vibration states; and

a display module for classifying the output data calculated by the calculation module, and sorting and displaying the classified output data based on a duty cycle of the machine.

According to another aspect of the present disclosure, there provides a data display method including the steps of:

recording a test scenario for design validation of the machine and a plurality of input and output data in real time during a duty cycle of the machine from the moment when the power supply of the machine is tuned on, and storing the test scenario and the input and output data;

analyzing real-time position information acquired by a GPS receiver mounted on the machine and determining whether the machine is under propulsion;

determining whether or not the machine is under vibration through pressure, vibration, and a switching signal changing amplitude of the machine, acquired from a pressure sensor and a vibration sensor mounted on the machine when the machine is under propulsion, and sensing the amplitude when the machine is under vibration;

analyzing the stored input data and the real-time position information and calculating output data including GPS hour of the machine, vibration high amplitude hour, vibration low amplitude hour, and a trip count which is the number of time of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA) when the machine is under propulsion and vibration; and

classifying the calculated output data, and sorting and displaying the classified output data based on a duty cycle of the machine.

According to still another aspect of the present disclosure, there provides a data display system including:

a GPS receiver for grasping real-time position information;

a sensor for sensing if a construction machine is under vibration and pressure applied to the ground surface from the machine;

a pressure switch connected to the sensor for sensing the amplitude of the machine as vibration high amplitude and vibration low amplitude when the machine is under vibration and generating the sensed amplitude information as a switch signal;

a display apparatus for sensing propulsion and vibration of the machine based on input information including a pressure switch signal and position information applied thereto from the sensor, the pressure switch, and the GPS receiver, calculating output information including GPS hour during a duty cycle of the machine, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA) when the machine is under propulsion and vibration, and displaying the calculated output information.

According to the present disclosure, duty cycle of the machine during the field test is monitored without manual intervention, recording error of the duty cycle by the manual operation and the erroneous operation caused thereby are prevented, and quantitative data for accurate qualitative analysis is provided so that input and output data can be processed more safely accurately.

In addition, the present disclosure can be extended to be applied to a reset feature test of a compactor, and can be extended as a remote monitoring interface for a global system for mobile communication (GSM) network.

FIG. 1 is a view exemplarily showing a data display apparatus according to an embodiment of the present disclosure;

FIG. 2 is a schematic block diagram showing input and output data and a data display apparatus according to an embodiment of the present disclosure;

FIG. 3a is a block diagram showing an internal configuration of a data display apparatus according to an embodiment of the present disclosure;

FIG. 3b is a table listing data necessary for design validation in a field test of the machine according to an embodiment of the present disclosure;

FIG. 3c is a table listing sorted various output data during a duty cycle according to an embodiment of the present disclosure;

FIG. 4 is a flow chart showing a data display method according to another embodiment of the present disclosure;

FIG. 5 is a flow chart showing an erroneous data detection process according to an embodiment of the present disclosure;

FIG. 6 is a flow chart showing the operation of a data display method according to an embodiment of the present disclosure; and

FIG. 7 is a block diagram showing a configuration of a computer apparatus that can execute a data display method according to an embodiment of the present disclosure.

In a preferred embodiment, the sensing module may include: a propulsion sensing unit for determining whether or not the machine is under propulsion through the analysis of real-time position information received by a GPS receiver, and sensing the speed of the machine if it is determined that the machine is under propulsion; and a vibration sensing unit for determining whether the machine is under vibration at either high or low amplitude using a signal of a pressure switch connected to the pressure sensor.

In a preferred embodiment, the data display apparatus may include: a data monitoring module for monitoring input data including a pressure, a switching signal, a real-time GPS signal during a periodic duty cycle from the moment when the power supply of the machine on which the data display apparatus is mounted is tuned on, and output data including vibration high amplitude hour, vibration low amplitude hour, and the number of times of conversion between VHA and VLA, recording the monitored input data and output data, and storing the recorded input data and output data in the database; and the database for storing the monitored input data and output data and the test scenario of the machine.

In a preferred embodiment, the calculation module may include an erroneous data determination unit for comparing input and out data included in the test scenario with the monitored input and output data to calculate an error value by each data, and determining data of which the calculated error value is more than a preset value, as erroneous data.

In a preferred embodiment, the vibration sensing unit may compare a vibration value acquired from the vibration sensor with a preset value, determine that the machine is under vibration at low amplitude if the vibration value is more than the preset value, and determine that the machine is under vibration at high amplitude if the vibration value is less than the preset value, wherein the vibration sensing unit may determine that the machine is under vibration at high amplitude if a time difference of the time point when the height of the machine is the same is less than a specific time value, and determine that the machine is under vibration at low amplitude if the time difference is more than specific time value, or wherein the vibration sensing unit determine that that the machine is under vibration at high amplitude if pressure data sensed in the machine is more than a specific value at a specific time point, and determine that the machine is under vibration at low amplitude if the pressure data is less than the specific value at the specific time point.

In a preferred embodiment, the step of calculating the output data may include: calculating an error value by each data between the input and output data included in the test scenario and the monitored input and output data; determining data of which the calculated error value is more than a preset value, as erroneous data; and extracting and displaying the determined erroneous data.

In a preferred embodiment, the step of determining whether or not the machine is under propulsion comprising identifying the speed and the speed variation amount of the machine through the analysis of the real-time position information, and determining that the machine is under propulsion if the speed of the machine is more than a preset value.

In a preferred embodiment, the step of sensing the amplitude may include comparing a vibration value acquired from the vibration sensor with a preset value, determining that the machine is under vibration at low amplitude if the vibration value is more than the preset value, and determining that the machine is under vibration at high amplitude if the vibration value is less than the preset value. The step of sensing the amplitude may include determining that the machine is under vibration at high amplitude if a time difference of the time point when the height of the machine is the same is less than a specific time value, and determining that the machine is under vibration at low amplitude if the time difference is more than specific time value. Alternatively, the step of sensing the amplitude may include determining that that the machine is under vibration at high amplitude if pressure data sensed in the machine is more than a specific value at a specific time point, and determining that the machine is under vibration at low amplitude if the pressure data is less than the specific value at the specific time point.

In a preferred embodiment, the display apparatus may compare input and output information of a previously stored test scenario with input and output information of the display apparatus, and determine erroneous information through a result of the comparison.

Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. While the present disclosure will be described in conjunction with the following embodiments, it will be understood that they are not intended to limit the present disclosure to these embodiments alone. On the contrary, the present disclosure is intended to cover alternatives, modifications, and equivalents which may be included within the spirit and scope of the present disclosure as defined by the appended claims. Furthermore, in the following detailed description of the present disclosure, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, embodiments of the present disclosure may be practiced without these specific details.

The present disclosure is directed to a tracker system for monitoring and displaying various data required in a design validation test when the machine is under propulsion and vibration at the time of design validation of a construction machine and a system. In particular, the data display apparatus according to an embodiment of the present disclosure can be configured to output data such as GPS hour of the machine and the number of times of conversion between VHA and VLA through a GPS hour meter and a trip counter, and can be configured to output data such as vibration high amplitude hour and vibration low amplitude hour through a pressure switch signal. The present disclosure enables input and output data to be acquired more accurately during the propulsion and vibration of the machine so that data reliability can be improved and data error can be easily detected.

Advantages and features of the present disclosure and a method for accomplishing the advantages and feature will be apparent by way of embodiments which will be described in detail later with reference to the accompanying drawings. However, the present disclosure is not limited to embodiments disclosed below but may be implemented into different forms. Embodiments are provided only for illustrative purposes and for full understanding of the scope of the present invention by those skilled in the art, and the scope of the present disclosure is defined by the appended claims. Meanwhile, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Additionally, the terms, “includes,” “including,” “comprises” and “comprising,” specify the presence of the stated elements, steps or operations but do not preclude the presence or addition of one or more other elements, steps or operations.

As used herein, the term “module” should be construed as including software, hardware or a combination thereof depending on the context in which the term is used. For example, the software may be machine code, firmware, embedded code, and application software. As another example, the hardware may be circuit, processor, computer, integrated circuit, integrated circuit core, sensor, microelectro mechanical system (MEMS), passive device, or a combination thereof.

Hereinafter, a preferred embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view exemplarily showing a data display apparatus according to an embodiment of the present disclosure.

Referring to FIG. 1, a data display apparatus 40 according to an embodiment of the present disclosure includes a vibration sensor, a hour meter, a trip counter, a display unit 43, and a push button 45. The data display apparatus 40 can be configured to be connected to a power supply unit 10, a first pressure switch 20, a second pressure switch 30, and a GPS receiver 50. The data display apparatus 40 according to an embodiment of the present disclosure monitors and displays data required in a design validation test during propulsion and vibration of the machine depending on a duty cycle through each of the elements as described above.

In this embodiment, the vibration sensor mounted on a construction machine as an object to be tested is connected to a vibration port, and may include a pressure switch that generates a switching signal for sensing vibration at high amplitude (VHA) and vibration at low amplitude (VLA).

The hour meter of the data display apparatus 40 may include a GPS receiver 50. The GPS receiver 50 senses a relative position change of the machine in real time to acquire the speed information of the machine, which corresponds to the relative position change of the machine. In addition, the GPS receiver 50 is operated to record GPS hour which is real-time position information only when the machine satisfies propulsion and vibration conditions simultaneously, and records vibration high amplitude (VHA) hour and vibration low amplitude (VLA) hour when the machine satisfies propulsion and vibration conditions simultaneously.

The trip counter records the number of times the operator has moved from VHA to VLA and vice versa. For example, the trip counter increments whenever at least one input value of the pressure switches is changed from an inactive state to an active state. In other words, the trip counter can be configured to increment whenever the state of the switching signal value for the sensed pressure is changed.

The display unit 43 displays data indicating current time and trip count. As shown in FIG. 1, the display unit 43 displays respective data of a GPS hour meter, a vibration high amplitude hour meter, a vibration low amplitude hour meter, and a trip counter on divided

display segments

1, 2, 3 and 4. The displayed data can be converted by a push button switch 45. In this embodiment, the display unit 43 can be implemented as a liquid crystal display (LCD). When the machine is supplied with power, the display unit 43 converts each of the

segments

1, 2, 3 and 4 of the display unit 43 into an ON state and displays the values of the hour meters and the number of times conversion between VHA to VLA, which correspond to the respective segments. In addition, when the push button switch 45 mounted on the display unit 43 is pressed in a hour meter mode of the display unit 43, the display unit 43 is driven to convert the LCD screen to display the trip count. In this case, the display unit 43 displays a corresponding value on the display segment indicating the trip count.

FIG. 2 is a schematic block diagram showing input and output data and a data display apparatus according to an embodiment of the present disclosure.

Referring to FIG. 2, the data display apparatus 100 according to an embodiment of the present disclosure is connected to a power supply unit 21, a first pressure switch 22, a second pressure switch 23, a GPS signal processing unit 24, and a momentary on switch 25 to receive input data from the above constituent elements. According to this embodiment, the data display apparatus 100 that can be implemented as a logic and driver circuit is driven to display the output data including GPS hour, the number of times of conversion between VHA and VLA, vibration low amplitude hour and vibration high amplitude hour by processing a pressure and an input speed signal of the pressure switch and the momentary on switch.

The power supply unit 21 supplies power to drive the apparatus. For example, the power of 12V is supplied from a battery mounted on the machine to the data display apparatus 100. When the power supply unit 21 is powered on, the data display apparatus 100 acquires a voltage of 12V through the electrical connection between the power supply unit 21 and the data display apparatus 100, and the voltage drives the GPS receiver to cause the GPS signal processing unit 24 to be driven.

The first pressure switch 22 and the second pressure switch 23 are connected to a vibration sensor and a vibration port to sense the amplitude state of vibration at high amplitude (VHA) and vibration at low amplitude (VLA) and generate a switching signal corresponding to the sensed amplitude state. In this embodiment, the two pressure switches 22 and 23 can be maintained in a normally open state, and only one pressure switch can be converted from high amplitude to low amplitude and vice versa. In addition, the two pressure switches can convert the amplitude state simultaneously. For example, when the two pressure switches sense pressure of a specific value, they are converted into a normally open state to change the switch state. The pressure switches receives a negative signal from the battery.

The GPS signal processing unit 24 analyzes real-time position information to acquire the speed data of the machine, and inputs the analyzed position information to the data display apparatus implemented as the logic circuit.

The momentary on switch 25 is used to indicate the GPS hour and the trip count by the display unit 43. For example, the momentary on switch 25 can be used to convert the display of the GPS hour and the trip count. When the momentary on switch 25 is pressed for more than a preset time, the display can be initialized.

The data display apparatus 100 that can be implemented as the logic and driver circuit can be composed of a microcontroller that reads out GPS information in the form of National Marine Electronics Association (NMEA) and a serial interface. Thus, the received information can be used to determine the speed (Km/h) and acquire sufficient input data to determine whether or not the machine is under propulsion.

In addition, in this embodiment, the data display apparatus can sense the vibration state of the machine by monitoring a change in the pressure through the pressure switch signal. In particular, in the present disclosure, hour/time can be recorded only when the speed of the machine not is 0 but the machine is under propulsion.

Hereinafter, the data (1), (2), (3) and (4) recorded and output by the data display apparatus according to the present disclosure will be described in more detail.

(a) GPS hour meter: It records vibration high amplitude hour, vibration low amplitude hour, and GPS hour only when the machine satisfies the propulsion and vibration states simultaneously.

(b) Trip counter: It records the number of times the operator has converted from vibration at high amplitude (VHA) to vibration at low amplitude (VLA) and vice versa when the machine is maintained in a propulsion state of more than a specific speed.

(c) Vibration high amplitude hour meter: It records vibration high amplitude hour when the machine is vibrated at more than a specific amplitude when the machine is under propulsion and vibration.

(d) Vibration low amplitude hour meter: It records vibration low amplitude hour when the machine is vibrated at less than a specific amplitude when the machine is under propulsion and vibration.

With respect to all the above-described output, the speed of the machine is one of essential input data sensed through the GPS receiver. In addition, vibration at high or low amplitude can be sensed by a pressure switch connected to each port. In other words, the amplitude is differently sensed by the pressure switch signal and the output data is recorded accordingly.

Hereinafter, a series of data processing processes for acquiring the output data in the data display apparatus according to an embodiment of the present disclosure will be described with reference to FIG. 3.

FIG. 3a is a block diagram showing an internal configuration of a data display apparatus according to an embodiment of the present disclosure.

Referring to FIG. 3a, the data display apparatus 100 according to this embodiment may include a sensing module 110, a calculation module 130, a display module 150, a database 120, and a monitoring module 140.

The database 120 stores input data and output data necessary for design validation of the machine, which are monitored by the monitoring module 140 from the moment when the power supply of the machine is turned on depending on a duty cycle. Specifically, the monitoring module 140 monitors input data including pressure data, a switching signal, and real-time GPS signal and output data including vibration high amplitude hour, vibration low amplitude hour, and the number of times of conversion between VHA and VLA during a periodic duty cycle from the moment when the power supply of the machine is turned on, and stores the monitored input and output data in the database 120. The database 120 stores a test scenario according to the kind of the machine, which performs a test.

The sensing module 110 senses the propulsion and vibration states of the machine using pressure data sensed by the pressure sensor, vibration data sensed by the vibration sensor, a switching signal, and a real-time GPS signal analysis result. To this end, the sensing module 110 includes a propulsion sensing unit 111 and a vibration sensing unit 113.

The propulsion sensing unit 111 determines whether or not the machine is under propulsion through the analysis of real-time position information received by the GPS receiver. If it is determined that the machine is under propulsion, the propulsion sensing unit 110 acquires the speed information of the machine.

The vibration sensing unit 113 determines whether or not the machine is under vibration using a signal of a pressure switch connected to the pressure sensor. If it is determined that the machine is under vibration, the vibration sensing unit 113 determines whether the machine is under vibration at high amplitude (VHA) or vibration at low amplitude (VLA). For example, the amplitude of the machine is sensed through the switching signal. In addition, a vibration value acquired from the vibration sensor may be compared with a preset value, and if the vibration value is more than the preset value, the vibration sensing unit 113 may determine that the machine is under vibration at low amplitude. On the contrary, if the vibration value is less than the preset value, the vibration sensing unit 113 may determine that the machine is under vibration at high amplitude. Further, if a time difference of the time point when the height of the machine is the same is less than a specific time value, the vibration sensing unit 113 may determine that the machine is under vibration at high amplitude, and if the time difference is more than specific time value, the vibration sensing unit 113 may determine that the machine is under vibration at low amplitude. In addition, if pressure data sensed in the machine is more than a specific value at a specific time point, the vibration sensing unit 113 may determine that the machine is under vibration at high amplitude, and if the pressure data is less than the specific value at the specific time point, the vibration sensing unit 113 may determine that the machine is under vibration at low amplitude. The sensing module 110 transfers information on the propulsion and vibration states of the machine to the calculation module 130.

The calculation module 130 calculates output data including GPS hour of the machine, vibration high amplitude hour, vibration low amplitude hour, and the number of times of conversion between VHA and VLA based on pressure, amplitude, position and switching signal data, which are in real-time recorded in the database 120 when the machine is under propulsion and vibration. To this end, the calculation module 130 includes a GPS hour calculation unit 131, a VHA/VLA hour calculation unit 133, a trip count calculation unit 135, and an erroneous data determination unit 137.

The GPS hour calculation unit 131 analyzes the real-time position information acquired from the GPS receiver to grasp a traveling path of the machine, and calculates the time when the machine has been completely moved along the traveling path of the machine during a duty cycle, the time when the machine has stayed at a specific position, the traveling time of the machine, the speed and vibration of the machine, the engine running time at a propulsion state, etc.

The VHA/VLA hour calculation unit 133 calculates a vibration time according to vibration at high amplitude and vibration at low amplitude when the machine is under propulsion by extracting data stored in the database 120.

The trip count calculation unit 135 counts the number of times of conversion between VHA and VLA using the amplitude information, the pressure switch signal and the like, which are applied thereto from the vibration sensing unit 110 and the VHA/VLA hour calculation unit 133. For example, the trip count calculation unit 135 counts the number of times of conversion from VHA to VLA, and vice versa through vibration sensing information acquired from the vibration sensor and the pressure sensor and the pressure switch signal.

The erroneous data determination unit 137 compares input and out data included in a test scenario according the kind of the machine, which is previously stored in the database 120 with monitored input and output data to calculate an error value by each data, and determines data to be erroneous data if the calculated error value of the data is more than a preset value. In this case, the error value can be defined as a difference or a ratio value between the input and output data included in the test scenario and the actually measured input and output data, but is not limited thereto.

Subsequently, the calculation module 130 transfers the input data, various output data calculated, and erroneous data information to the display module 150.

The display module 150 classifies the transferred data, and sorts and displays the classified output data based on a duty cycle of the machine. For this end, the display module 150 includes a classification unit 151 for determining the data attribute of the input data and the output data and classifying data having the same attribute into one group, and a sorting unit 153 for sorting the classified data depending on a data sorting criterion including the duty cycle.

FIGs. 3b and 3c are tables listing data sorted according to an embodiment of the present disclosure.

FIG. 3b is a table listing data necessary for design validation in a field test of the machine according to an embodiment of the present disclosure.

Referring to FIG. 3b, the display module 150 can display a time ratio (a) at which the machine is running under vibration and a time ratio (b) at which that machine is running under no vibration so that the time ratio (a) and the time ratio (b) can be usefully used to display test data of a construction machine whose data for the vibration state is a critical validation factor such as a compactor

FIG. 3c is a table listing sorted various output data during a duty cycle according to an embodiment of the present disclosure.

Referring to FIG. 3c, a propulsion state (e) of the machine, a machine running data (d) at high amplitude, a machine running data (e) at low amplitude, and detailed information (f) on the machine propulsion at a duty cycle can be provided through the embodiment of the present disclosure. As in the embodiment, the running state of the machine can be grasped more accurately through the provision of more segmented input and output data including the vibration and propulsion states, and a precise analysis can be made in the case where erroneous data occurs so that the cause of the data error can be rapidly found and solved.

Hereinafter, the data display method according to the present disclosure will be described sequentially.

The operation (or function) of the data display method according to the present disclosure is essentially the same as the function of the data display apparatus and system, and thus a detailed description thereof as shown in FIGs. 1 to 3b will be omitted to avoid redundancy.

FIG. 4 is a flow chart showing a data display method according to another embodiment of the present disclosure.

First, the monitoring module 140 records a test scenario for design validation of the machine and a plurality of input and output data in real time during a duty cycle of the machine from the moment when the power supply of the machine is tuned on, and stores the test scenario and the input and output data in the database 120 (S110).

The sensing module 110 determines whether or not the machine is under propulsion by analyzing the real-time position information acquired through the GPS receiver mounted on the machine (S120). For example, the speed and the speed variation amount of the machine can be identified through the analysis of the real-time position information, and if the speed of the machine is more than a preset value, the sensing module 110 can determine that the machine is under propulsion.

Subsequently, the sensing module 110 determines whether or not the machine is under vibration through amplitude information and a switching signal of the machine, acquired from a pressure sensor and a vibration sensor mounted on the machine when the machine is under propulsion, and senses the amplitude when the machine is under vibration (S140). In this case, the amplitude can be sensed with it divided into a high output amplitude and a low output amplitude. For example, the amplitude of the machine may be determined as follows.

A vibration value acquired from the vibration sensor is compared with a preset value, it is determined that the machine is under vibration at low amplitude if the vibration value is more than the preset value, and it is determined that the machine is under vibration at high amplitude if the vibration value is less than the preset value. In addition, it may be determined that the machine is under vibration at high amplitude if a time difference of the time point when the height of the machine is the same is less than a specific time value, and it may be determines that the machine is under vibration at low amplitude if the time difference is more than specific time value. Alternatively, it may be determined that that the machine is under vibration at high amplitude if pressure data sensed in the machine is more than a specific value at a specific time point, and it may be determined that the machine is under vibration at low amplitude if the pressure data is less than the specific value at the specific time point.

The calculation module 130 calculates output data including GPS hour, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between VHA and VLA analyzing GPS hour, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between VHA and VLA by analyzing the stored input data and the real-time position information when the machine is under propulsion and vibration (S150).

Subsequently, the display module 150 classifies the calculated output data, sorts the classified output data based on a duty cycle of the machine depending on data attribute, and displays the sorted output data depending on the setting of a user (S170).

FIG. 5 is a flow chart showing an erroneous data detection process according to an embodiment of the present disclosure.

If it is determined that the machine is under propulsion and vibration, the erroneous data determination unit 137 performs a process of calculating an error value by each data between the input and output data included in the test scenario and the monitored input and output data at step S151. Thereafter, the erroneous data determination unit 137 performs a process of determining data of which the calculated error value is more than a preset value, as erroneous data at step S153, and extracting the determined erroneous data at step S155 so that the sorted erroneous data can be sorted and displayed depending on a criterion at step S160.

FIG. 6 is a flow chart showing the operation of a data display method according to an embodiment of the present disclosure.

At step S510, when the engine is started up, the propulsion sensing unit 111 of the sensing module 110 performs a process of determining whether or not the machine is under propulsion at step S520. For example, if it is determined that the speed of the machine is more than a specific speed through real-time analysis of a GPS position signal, the vibration sensing unit 113 senses if the machine is under vibration at step S530. In a preferred embodiment, the GPS hour meter can be configured such that the speed of the machine is recorded if it is more than 2km/H at step S520. In this case, any one of the first pressure switch and the second pressure switch is 0V (i.e., active low).

In this embodiment, the vibration sensing unit 113 can determine whether or not the machine is under vibration through analysis of the pressure switching signal various data. If is determined at step S530 that the machine is not under vibration, the program proceeds to step S535 where the display module 150 displays a state in which the GPS hour, the vibration high amplitude hour, the vibration low amplitude hour, and the trip count has no increment.

If it is determined at step S530, the machine is under vibration, the program proceeds to step S540 where the vibration sensing unit 113 determines whether or not the vibration of the machine is vibration at high amplitude. If it is determined at step S540 that the vibration of the machine is vibration at high amplitude, the program proceeds step S550 where the GPS hour and the vibration high amplitude hour are output, and the trip count is output with it displayed with increment and the vibration low amplitude hour are output is displayed with no increment. In other words, in this embodiment, the trip counter is incremented each time the first or second pressure switch is changed from an inactive state to an active state.

On the other hand, if it is determined at step S540 that the vibration of the machine is not vibration at high amplitude, the program proceeds step S545 where the GPS hour and the vibration low amplitude hour are output, the trip count is output with it displayed with increment, and the vibration high amplitude hour is displayed with no increment.

If it is determined at step S520 that the machine is not under propulsion, the program proceeds to step S523 where the sensing module 110 determines whether or not the machine is under vibration at a static state. If it is determined at step S523 that the machine is not under vibration at a static state, the program proceeds to step S528 where the GPS hour, the vibration high amplitude hour, the vibration low amplitude hour, and the trip count are displayed with no increment. If it is determined at step S523 that the machine is under vibration at a static state, the program proceeds to step S526 where the vibration sensing unit 113 determines whether or not the machine is under vibration at high amplitude. If it is determined at step S526 that the machine is under vibration at high amplitude, the program proceeds to step S536 where the GPS hour, the vibration high amplitude hour, the vibration low amplitude hour, and the trip count are displayed with no increment. On the contrary, if it is determined at step S526 that the machine is not under vibration at high amplitude, the program proceeds to step S529 where the GPS hour, the vibration high amplitude hour.

In the present disclosure, particularly, when the machine is under propulsion and vibration, the hours and the trip count are recorded. Thus, if it is determined that the machine is not under propulsion (S528, S536 and S529), in case of all the output data, previously recorded data is output with no increment.

The present disclosure senses the propulsion and vibration of the machine, and output the GPS hour of the machine, the number of times of conversion between VHA and VLA, the vibration high amplitude hour, and the vibration low amplitude hour if the machine is under propulsion and vibration to provide more precise test data information so that test reliability can be improved and data error can be easily detected.

In the meantime, the data display method according to the embodiment of the present disclosure can be implemented in a computer system or recorded in a recording medium. As shown in FIG. 7, the computer system may include at least one processor 121, a memory 123, a user interface input device 126, a data communication bus 122, a user interface output device 127, and a storage 128. The constituent elements as described above perform a data communication through the data communication bus 122. The computer system may further include a network interface 129 coupled to the network. The processor 121 may be a central processing unit (CPU) or a semiconductor device that processes an instruction stored in the memory 123 or the storage 128. The memory 123 or the storage 128 may include a volatile or non-volatile storage medium of various forms. For example, the memory 123 may include a read only memory (ROM) 124 and a random access memory (RAM) 125.

Meanwhile, the data display method according to the embodiment of the present disclosure can be implemented as a code that can be read by a computer on a recording medium readable by the computer. The recording medium readable by the computer includes all kinds of recording medium having stored therein data readable by the computer system. For example, the recording medium may include an ROM, an RAM, a magnetic tape, a magnetic disc, a flash memory, an optical data storage device, etc. In addition, the recording medium readable by the computer may be stored and executed as a code which is distributed in a computer system connected to a computer communication network and is readable in a distribution method.

It should be noted that the self-refilled water ballast, according to the present disclosure, is not limited to the pneumatic tire compactors as shown in the embodiments, but can be widely used for various construction machinery equipped with a ballast system.

Although the invention has been described with reference to the preferred embodiments in the attached figures, it is noted that equivalents may be employed and substitutions made herein without departing from the scope of the invention as recited in the claims.

Claims

A data display apparatus, comprising:

a sensing module for sensing a propulsion state of a construction machine using a real-time global positioning system (GPS) signal, and sensing a vibration state including vibration at high amplitude (VHA) and vibration at low amplitude (VLA) using a pressure switch signal and pressure and vibration data sensed by a pressure sensor if the machine is under propulsion;

a calculation module for calculating output data including GPS hour, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between VHA and VLA based on pressure, vibration, position and switch signal data recorded in a database in real time if it is sensed that the machine is under propulsion and vibration states; and

a display module for classifying the output data calculated by the calculation module, and sorting and displaying the classified output data based on a duty cycle of the machine.
The data display apparatus as claimed in claim 1, wherein the sensing module comprises:

a propulsion sensing unit for determining whether or not the machine is under propulsion through the analysis of real-time position information received by a GPS receiver, and sensing the speed of the machine if it is determined that the machine is under propulsion; and

a vibration sensing unit for determining whether the machine is under vibration at either high or low amplitude using a signal of a pressure switch connected to the pressure sensor.
The data display apparatus as claimed in claim 1, wherein the data display apparatus comprises:

a data monitoring module for monitoring input data including a pressure, a switching signal, a real-time GPS signal during a periodic duty cycle from the moment when the power supply of the machine on which the data display apparatus is mounted is tuned on, and output data including vibration high amplitude hour, vibration low amplitude hour, and the number of times of conversion between VHA and VLA, recording the monitored input data and output data, and storing the recorded input data and output data in the database; and

the database for storing the monitored input data and output data and the test scenario of the machine.
The data display apparatus as claimed in claim 3, wherein the calculation module comprises an erroneous data determination unit for comparing input and out data included in the test scenario with the monitored input and output data to calculate an error value by each data, and determining data of which the calculated error value is more than a preset value, as erroneous data.
The data display apparatus as claimed in claim 2, wherein the vibration sensing unit compares a vibration value acquired from the vibration sensor with a preset value, determines that the machine is under vibration at low amplitude if the vibration value is more than the preset value, and determines that the machine is under vibration at high amplitude if the vibration value is less than the preset value,

wherein the vibration sensing unit determines that the machine is under vibration at high amplitude if a time difference of the time point when the height of the machine is the same is less than a specific time value, and determines that the machine is under vibration at low amplitude if the time difference is more than specific time value, or

wherein the vibration sensing unit determines that that the machine is under vibration at high amplitude if pressure data sensed in the machine is more than a specific value at a specific time point, and determines that the machine is under vibration at low amplitude if the pressure data is less than the specific value at the specific time point.
A data display method comprising the steps of:

recording a test scenario for design validation of the machine and a plurality of input and output data in real time during a duty cycle of the machine from the moment when the power supply of the machine is tuned on, and storing the test scenario and the input and output data;

analyzing real-time position information acquired by a GPS receiver mounted on the machine and determining whether the machine is under propulsion;

determining whether or not the machine is under vibration through pressure, vibration, and a switching signal changing amplitude of the machine, acquired from a pressure sensor and a vibration sensor mounted on the machine when the machine is under propulsion, and sensing the amplitude when the machine is under vibration;

analyzing the stored input data and the real-time position information and calculating output data including GPS hour of the machine, vibration high amplitude hour, vibration low amplitude hour, and a trip count which is the number of time of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA) when the machine is under propulsion and vibration; and

classifying the calculated output data, and sorting and displaying the classified output data based on a duty cycle of the machine.
The data display method as claimed in claim 6, wherein the step of calculating the output data comprises:

calculating an error value by each data between the input and output data included in the test scenario and the monitored input and output data;

determining data of which the calculated error value is more than a preset value, as erroneous data; and

extracting and displaying the determined erroneous data.
The data display method as claimed in claim 6, wherein the step of determining whether or not the machine is under propulsion comprising identifying the speed and the speed variation amount of the machine through the analysis of the real-time position information, and determining that the machine is under propulsion if the speed of the machine is more than a preset value.
The data display method as claimed in claim 6, wherein the step of sensing the amplitude comprising comparing a vibration value acquired from the vibration sensor with a preset value, determining that the machine is under vibration at low amplitude if the vibration value is more than the preset value, and determining that the machine is under vibration at high amplitude if the vibration value is less than the preset value,

determining that the machine is under vibration at high amplitude if a time difference of the time point when the height of the machine is the same is less than a specific time value, and determining that the machine is under vibration at low amplitude if the time difference is more than specific time value, or

determining that that the machine is under vibration at high amplitude if pressure data sensed in the machine is more than a specific value at a specific time point, and determining that the machine is under vibration at low amplitude if the pressure data is less than the specific value at the specific time point.
A recording medium with a program recorded thereon for executing a data display method so as to be read by a computer.
A data display system comprising:

a GPS receiver for grasping real-time position information;

a sensor for sensing if a construction machine is under vibration and pressure applied to the ground surface from the machine;

a pressure switch connected to the sensor for sensing the amplitude of the machine as vibration high amplitude and vibration low amplitude when the machine is under vibration and generating the sensed amplitude information as a switch signal;

a display apparatus for sensing propulsion and vibration of the machine based on input information including a pressure switch signal and position information applied thereto from the sensor, the pressure switch, and the GPS receiver, calculating output information including GPS hour during a duty cycle of the machine, vibration high amplitude hour, vibration low amplitude hour, and trip count which is the number of times of conversion between vibration at high amplitude (VHA) and vibration at low amplitude (VLA) when the machine is under propulsion and vibration, and displaying the calculated output information.
The data display system as claimed in claim 11, wherein the display apparatus compares input and output information of a previously stored test scenario with input and output information of the display apparatus, and determines erroneous information through a result of the comparison.