KR20210111718A - A method and system for monitoring a movable asset using a monitoring device - Google Patents

Abstract

The present specification discloses a method for monitoring a movable asset using a sensing terminal that includes a coupling part for coupling a target object and a housing, a sensor part that generates sensing data for the target object; a processor for generating transmission unit data to be transmitted to a server based on the sensed data; and a communication part for transmitting the transmission unit data to a server.

Description

A mobile asset monitoring system and a monitoring method using a sensing terminal {A method and system for monitoring a movable asset using a monitoring device}

The present invention relates to a method for monitoring a mobile asset.

With the development of IoT technology, the demand for remote monitoring and management of moving assets in factories or warehouses is increasing. In accordance with this, a number of methods for generating information about a mobile asset using an IoT terminal and transmitting it to a user terminal are disclosed.

Patent Document 1 is a sensor terminal that is respectively installed in one or more process equipment and conveyor to measure and analyze the operating state of the process equipment and conveyor, respectively, collects the result value analyzed by the sensor terminal, and based on the result value Disclosed is a factory monitoring system including a management server for determining whether a driving state is abnormal, and the display device for receiving and outputting the driving state and whether the driving state is abnormal.

However, in such systems, a significant amount of data is transmitted/received between the sensor terminal and the server for monitoring the target object. Accordingly, there is a problem in that the power consumption of the sensor terminal is increased. Due to this problem, the sensor terminal must use a constant power. When the battery is applied to the sensor terminal, there is a problem that the battery must be frequently replaced.

Laid-open Patent Publication No. 10-2018-0009563 (2018.01.29.)

In the present specification, by providing a sensing terminal installed in a thing that is a mobile asset such as a machine or facility in a factory, sensing data generated by the operation of the thing is effectively collected, and the collected data is analyzed to provide meaningful information about the state of the thing. By extracting and providing to users, it provides a method for users to effectively manage mobile assets.

Furthermore, in the present specification, a method of providing a warning message according to the level of risk to the user by performing risk determination according to the type of the sensing terminal attached to the object is separated from the object is provided.

A sensing terminal according to an embodiment for solving the above problem includes a housing, a coupling unit for coupling the target object and the housing, a sensor unit generating sensing data for the target object, and a server based on the sensing data. A processor for generating transmission unit data to be transmitted, and a communication unit for transmitting the transmission unit data to a server.

The processor may generate state data of the target thing having a data size smaller than a data size of the sensing data based on the sensing data, and the transmission unit data may include the status data of the target thing.

Further comprising an illuminance sensor formed on one side of the housing, wherein the processor determines whether the sensing terminal is detached from the target object according to a change in the illuminance value measured using the illuminance sensor, the processor A detachment type in which the sensing terminal is detached from the target object may be determined according to a change in the measured illuminance value using the illuminance sensor.

The processor compares the illuminance value measured from the illuminance sensor over time with a threshold illuminance value specified according to the lapse of time when the illuminance value is measured after the sensing terminal is attached to the target object, thereby the detachment type is determined, and when the measured illuminance value is greater than the critical illuminance value, the processor may determine the forced detachment.

and a detachable switch formed on one side of the housing, wherein the processor applies an illuminance measurement start signal to the illuminance sensor when receiving a detachment signal from the detachable switch, the processor illuminance measured from the illuminance sensor It may be determined whether the sensing terminal is detached from the target object according to a change in the value, and the illuminance sensor may not sense the illuminance before receiving the illuminance measurement start signal from the processor.

The illuminance sensor does not store the illuminance value in the memory when the measured illuminance value is less than the preset threshold value, and the illuminance sensor stores the illuminance value in the memory when the measured illuminance value is greater than or equal to the preset threshold value, A detach signal may be applied to the processor.

The coupling unit may further include a slit, and the illuminance sensor may sense the illuminance value by the light introduced through the slit even when the sensing terminal is attached to the target object.

In addition, the server according to an embodiment for solving the above problem includes a communication unit for receiving transmission unit data from a sensing terminal and a processor for obtaining sensing information of the sensing terminal from the transmission unit data, the processor comprising the The state of the object to which the sensing terminal is attached may be determined according to the sensing information.

The sensing information includes information on a base station performing a communication connection with the sensing terminal, and the processor includes the base station information in a safe cell, a list of base stations that can be communicated with when the sensing terminal is in a normal position. If the number of base stations registered in the safe cell is less than a preset number, the base station information may be added to the safe cell.

The sensing information includes information on a base station performing a communication connection with the sensing terminal, and the processor includes the base station information in a safe cell, a list of base stations that can be communicated with when the sensing terminal is in a normal position. If the number of base stations registered in the safe cell is a preset number without the safety cell, it may be determined that the sensing terminal has deviated from the normal position.

In addition, the method for monitoring a target object using a sensing terminal according to an embodiment for solving the above problem includes generating sensing data for the target object, and transmitting unit data to be transmitted to a server based on the sensing data. generating and transmitting the transmission unit data to a server.

The monitoring method includes determining whether the sensing terminal is detached from the target object according to a change in the illuminance value measured using the illuminance sensor, and the sensing terminal according to the change in the illuminance value measured using the illuminance sensor The method may further include determining a detachment type to be detached from the target object.

In addition, the target object monitoring method performed by the server in order to solve the above problem includes the steps of receiving transmission unit data from a sensing terminal, obtaining sensing information of the sensing terminal from the transmission unit data, and adding to the sensing information and determining the state of the target object to which the sensing terminal is attached.

Further comprising the step of determining whether the sensing terminal is located in the normal position based on a safe cell, which is a list of base stations to which the sensing terminal can be connected, when the sensing terminal is present in the normal position, wherein the sensing information includes the sensing terminal and Base station information for performing a communication connection is included, and when the base station information is not included in the safe cell and the number of base stations registered in the safe cell is less than a preset number, the base station information is added to the safe cell, and the When the safe cell does not include the base station information and the number of base stations registered in the safe cell is a preset number, it may be determined that the sensing terminal has deviated from its normal position.

In addition, in the computer-readable recording medium according to an embodiment for solving the above problems, a computer program written to perform at least one target object monitoring method is recorded.

The mobile asset monitoring method described in this specification provides a sensing terminal installed on a target object that is a mobile asset such as a machine or facility in a factory, effectively collecting sensing data generated by the operation of the object, and analyzing the collected data. By extracting meaningful information about the state of a thing and providing it to the user, the user can effectively manage the mobile asset.

Furthermore, the sensing terminal attached to the object performs risk determination according to the type of separation from the object, thereby providing an effect of providing a warning message according to the level of risk to the user.

1 is a conceptual diagram illustrating an overall configuration of a mobile asset monitoring system according to an embodiment.
2 is a block diagram illustrating an internal configuration of the sensing terminal 100 .
3 is a block diagram illustrating the internal configuration of the server 200 .
4 is a diagram illustrating an external appearance of the sensing terminal 100 according to an embodiment.
5A to 5B are diagrams illustrating patterns of illuminance values measured from the illuminance sensor 142 of the sensing terminal 100 .

The following is merely illustrative of the principles of the invention. Therefore, those skilled in the art can devise various devices that, although not explicitly described or shown herein, embody the principles of the invention and are included in the spirit and scope of the invention. In addition, it should be understood that all conditional terms and examples listed herein are, in principle, expressly intended only for the purpose of understanding the inventive concept and are not limited to the specifically enumerated embodiments and states as such. .

The above-described objects, features and advantages will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the invention pertains will be able to easily practice the technical idea of the invention. .

In the specification and claims, terms such as "first," "second," "third," and "fourth," are used, if any, to distinguish between like elements, and are not necessarily used in a specific sequence. or to describe the order of occurrence. It will be understood that the terminology used as such is to be understood as being interchangeable under appropriate circumstances to enable the embodiments of the invention described herein to operate, for example, in sequences other than those shown or described herein. Likewise, when methods are described herein as including a series of steps, the order of those steps presented herein is not necessarily the order in which those steps may be executed, and any described steps may be omitted or not described herein. Any other steps not included may be added to the method.

Also, terms such as "left", "right", "front", "behind", "top", "bottom", "above", "below" in the specification and claims are used for descriptive purposes, It is not necessarily intended to describe an invariant relative position. It will be understood that the terms so used are interchangeable under appropriate circumstances to enable the embodiments of the invention described herein to operate otherwise than, for example, as shown or described herein. As used herein, the term “connected” is defined as being directly or indirectly connected in an electrical or non-electrical manner. Objects described herein as being "adjacent" to one another may be in physical contact with one another, in proximity to one another, or in the same general scope or area as appropriate for the context in which the phrase is used.

In addition, in the specification and claims, references to 'connected', 'connecting', 'fastened', 'fastening', 'coupled', 'coupled', etc., and various variations of these expressions, refer to other elements directly It is used in the sense of being connected or indirectly connected through other components.

In addition, the suffixes "module" and "part" for the components used in this specification are given or mixed in consideration of the ease of writing the specification, and do not have distinct meanings or roles by themselves.

In addition, the terms used herein are for the purpose of describing the embodiment and not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprise' and/or 'comprising' means that a referenced component, step, operation and/or element is the presence of one or more other components, steps, operations and/or elements. or addition is not excluded.

In addition, in the description of the invention, if it is determined that a detailed description of a known technology related to the invention may unnecessarily obscure the gist of the invention, the detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a mobile asset monitoring method according to an embodiment of the present invention will be described with reference to the drawings. 1 is a conceptual diagram illustrating an overall configuration of a mobile asset monitoring system according to an embodiment.

The mobile asset monitoring system is composed of a sensing terminal 100 , a server 200 , and a user terminal 400 , and each component can communicate data with each other through the network 20 .

The sensing terminal 100 acquires data about the state of the target object 10, which is a moving asset for monitoring, and transmits the acquired data to the server 200 or the user terminal 400 through the network 20 do.

The sensing terminal 100 may be located in the target object 10 for data acquisition. In an embodiment, the sensing terminal 100 may acquire state data of the target object 10 by being attached to the inner or outer surface of the target object 10 and sensing the surface of the monitoring target object 10 . For example, the sensing terminal 100 may be attached to the outer surface of the target object 10 to generate vibration data of the target object 10 using a built-in acceleration sensor.

In another embodiment, the sensing terminal 100 may be located in the vicinity of the target object 10 . The sensing terminal 100 may acquire state data of the target thing 10 while being spaced apart from the target thing 10 by a predetermined distance. For example, the sensing terminal 100 may generate temperature data of the target object 10 at a location spaced apart from the target object 10 by a predetermined distance using a built-in thermal sensor.

The sensing terminal 100 will be described in more detail with reference to FIG. 2 . 2 is a block diagram illustrating an internal configuration of the sensing terminal 100 . The sensing terminal 100 includes a processor 110 , a memory 120 , a communication unit 130 , a sensor unit 140 , a user interface 150 , a power supply unit 160 , and an object coupling unit 170 in a housing (not shown). It may be configured to include, some components may be omitted or may be configured to further include other components as necessary.

The processor 110 generates state data of the target object 10 by controlling each configuration constituting the sensing terminal 100 using a program and data stored in the memory 120 , and stores the state data in the memory 120 . Save. For example, the processor 110 generates state data of the target object 10 by controlling the sensor unit 140 according to a sensing algorithm stored in the memory and stores it in the memory 120 , or transmits the generated data to the communication unit 130 . ) can be used to transmit to the server 200 or the user terminal 300 .

The processor 110 may generate state data of a target object having a data size smaller than the data size of the sensed data based on the sensed data in order to reduce the size of data transmitted through the communication unit 130 . And by using this, transmission unit data can be generated.

The memory 120 includes programs and data for operating each module of the processor 110 and the sensing terminal 100 . Data generated according to the operation of the sensing terminal 100 may be stored in the memory 120 .

The communication unit 130 performs wired or wireless communication with an external device so that the sensing terminal 100 can transmit and receive data to and from the server 200 or the user terminal 300 . The communication unit 130 may include a SIM connector capable of inserting a USIM card containing identification information of a wireless communication line subscriber.

The sensor unit 140 includes at least one sensor for the sensing terminal 100 to generate state information of the target object 10 . Hereinafter, examples of available sensors will be described. The scope of the present invention is not limited by the following description.

In an embodiment, the sensor unit 140 may include an acceleration sensor or a gyro sensor to obtain vibration data and/or data on whether the target object 10 moves. The sensor unit 140 may include a temperature sensor to measure the temperature of the target object 10 . For example, an infrared thermometer or the like may be applied. The sensor unit 140 may include a humidity sensor to measure the humidity near the target object 10 . The sensor unit 140 may include an illuminance sensor for measuring ambient illuminance of the sensing terminal 100 . When the sensing terminal 100 is attached to the target object 10 , the sensor unit 140 detaches the sensing terminal 100 from the target object 10 to separate the sensing terminal 100 from the target object 10 . It may include a detachable switch for sensing whether or not. In addition, the sensor unit 140 may use a GPS sensor, a gyro sensor, and/or a geomagnetic sensor to determine whether the target object 10 is moving, and a barometric pressure sensor and/or pressure to determine atmospheric pressure or pressure. A sensor may be used, and an wattage sensor may be included to sense the wattage of the target object 10 .

The user interface 150 includes a user input unit for controlling the sensing terminal 100 and an information output unit providing information to the user. In an embodiment, the user input unit may be configured as a button, and the information output unit may be configured as an LED or a speaker. For example, an operation button for changing the state of the terminal or an LED for displaying the operation state may be configured on the side of the sensing terminal 100 . In one embodiment, the LED may represent the remaining battery level of the sensing terminal 100 in green, yellow, and red, and the LED may maintain a lit state when a communication connection is not made.

The power supply unit 160 is a means for supplying power to the sensing terminal 100 and may be composed of external wired power or an internal or external battery.

The coupling unit 170 is a coupling means for coupling the sensing terminal 100 to the target object 10 . In one embodiment, the coupling part 170 may be a double-sided tape having strong adhesive force or a bolt for mechanical bonding, and may be a welding base material when welding is performed according to an embodiment.

The server 200 will be described in more detail with reference to FIG. 3 . 3 is a block diagram illustrating the internal configuration of the server 200 . The server 200 may be configured to include a processor 210, a memory 220, a communication unit 230, a user interface 240, and a power supply unit 250 in a housing (not shown), and may include some components as needed. It may be omitted or configured to further include other components.

The processor 210 operates the server 200 by controlling the components of the server 200, such as the memory 220, the communication unit 230, and the power supply unit 250, and monitors a mobile asset according to an embodiment of the present invention. do the method

The memory 220 may store a program necessary for the operation of the processor 210 , the sensing data received from the sensing terminal 100 , and the analysis result data extracted by the operation of the processor 210 .

The communication unit 230 may transmit and receive data by performing data communication with an external terminal such as the sensing terminal 100 , the analysis model learning unit 300 , and the user terminal 400 under the control of the processor 210 . For example, the communication unit 230 may receive data such as sensing data and a warning notification from the sensing terminal 100 , and transmit data for learning to the analysis model learning unit 300 and receive the analysis model. In addition, it is possible to transmit mobile asset monitoring information according to a data analysis result generated as sensing data to the user terminal 400 .

Hereinafter, the operation of the server 200 will be described. The server 200 compares the newly updated sensing data as received from the sensing terminal 100 with the existing data histories stored in the memory, thereby providing a different data value to the target object 10 to which the sensing terminal 100 is attached. It can be checked whether a state indicating The sensing data received by the server 200 from the sensing terminal 100 may include a generation time of the sensing data, information of the sensing terminal 100 generating the sensing data, a type of sensing data, and a value of the sensing data.

In an embodiment, the server 200 checks whether the value of the sensing data received from the sensing terminal 100 is within an effective variation range according to the existing data value stored in the memory, thereby the object to which the sensing terminal 100 is attached. It can be determined that an abnormal condition has occurred. In an embodiment, the effective variation range calculated according to the existing data value is a range of data values determined by the upper and lower limits visible to the existing data, or a data value determined according to a preset error rate based on the intermediate value between the upper and lower limits can be set in the range of

In addition, in an embodiment, the server 200 patterns the change history of the existing data, and determines whether the data updated from the sensing terminal 100 has continuity with the change pattern of the existing data, thereby determining the effective range of variation. can be set. In one example, the server 200 may generate a change pattern that periodically increases or decreases according to a change history of an existing data value. In this case, the effective variation range may be set as a range specified by an upper limit value and a lower limit value according to a variation pattern of the existing data. Alternatively, an effective variation range may be set as a data value range according to a preset error rate based on a predicted value predicted according to a current cycle according to a variation pattern for each cycle of the existing data.

The server 200 may store the updated sensing data in the memory as normal operation data when the sensing data updated from the sensing terminal 100 is within an effective variation range in relation to the existing data value stored in the memory. Furthermore, the server 200 may update the above-described effective variation range by reflecting the updated sensing data.

The server 200 may store the updated sensing data in the memory as abnormal operation data when the sensing data updated from the sensing terminal 100 is outside the effective variation range of the existing data value stored in the memory. Furthermore, a notification message may be transmitted to the user terminal 400 .

The server 200 may use a machine learning model to more accurately check the state information of the object 10 to which the sensing terminal 100 is attached by utilizing the sensing data received from the sensing terminal 100 . To this end, the server 200 may transmit sensing data to the analysis model learning unit 300 . After the analysis model learning unit 300 completes the learning of the analysis model, the server 200 receives the analysis model from the analysis model learning unit 300 and analyzes the sensed data with the received analysis model to the target object 10 . status information can be analyzed in more detail.

In addition, the server 200 may generate various monitoring information according to the setting data received from the user terminal 400 . For example, the server 200 may receive sensing data of the target object 10 stored in the memory 120 of the sensing terminal 100 at regular intervals. For example, according to a user's setting, sensing data may be received once every 24 hours and stored in the memory 220 of the server 200 .

In addition, when the value of the sensing data is out of a preset effective variation range, when the remaining battery level of the sensing terminal 100 is insufficient, the server 200 determines that the GPS value of the sensing terminal 100 is within the normal position range set in advance by the user. When out of , when the power amount sensing value obtained from the power amount sensing module of the target object 10 of the sensing terminal 100 is out of the power range preset by the user, the corresponding event is stored in the memory and notified to the user terminal 400 can be sent.

In addition, the server 200 sets the industry in the industry classification in order to calculate the operation rate of the target object 10 according to the setting data received from the user terminal 400, and calculates the operation rate of mobile assets corresponding to the set industry. By analyzing whether the utilization rate has increased or decreased compared to the previous day, the previous month, or the previous year, it is possible to generate investment eligibility information that can determine whether the investment is eligible in the financial sector.

Industry classification may be industry classification information classified by public institutions according to industries. For example, it may be information classified by industry, such as electronic parts manufacturing. In the case of the utilization rate, it is an indicator of how much production equipment is used. It refers to the ratio of actual production to the maximum output that can be produced when the production equipment is normally operated under the given conditions (equipment, labor, production efficiency, etc.). , although there is a difference depending on the production facilities of individual companies, if the utilization rate is above 80%, it usually means normal operation. Therefore, if the current utilization rate of a specific field as described above is calculated, the growth rate of the corresponding industry field can be predicted.

The server 200 may determine that the corresponding field is growing if the operation rate of the previous day or the previous month or the previous year has increased, and if it has decreased, it may be determined that the corresponding field is in a stagnant or declining phase.

For such information processing, in the memory 220 of the server 200, the location and identification information of the target thing 10, history information of the target thing 10, industry classification table information of the target thing 10 owner, the owner of the movable property At least any one or more of information on company size and number of people, sales information, personality information of the owner of the object (10), financial statement information, authentication information of the owner of the object (10), and establishment information of the owner of the object (10) can be saved Through this, a financial institution that is one user of the user terminal 400 may use data to generate a reference indicator for determining whether or not an investment in the relevant field is eligible.

The server 200 may extract sensing data of the target things 10 corresponding to a set industry or region, or extract operation state information of the target thing 10 . For example, the server 200 extracts company information in the electronic component field in Daejeon, and then generates and stores sensing data or a target generated from the sensing terminal 100 of the target thing 10 owned by the company. State information of the thing 10 may be extracted. The server 200 may calculate the operation rate by industry or region with reference to the sensed data of the extracted target objects 10 .

For example, when the target object 10 is a conveyor belt, operation data thereof may be acquired. For example, if the conveyor belt is operated for 20 hours during the 24 hours to be calculated, the operation rate can be calculated as 83.3%. In this way, the server 200 may calculate the operation rate for each company corresponding to the above-described electronic component field.

Hereinafter, an embodiment constituting a mobile asset monitoring method according to an embodiment of the present invention will be described in detail.

In order for the sensing terminal 100 to continuously monitor the state of the target thing 10 , and to secure reliability that the monitored data is data about the target thing 10 , the sensing terminal 100 is the target thing 10 . ), it is necessary to check whether it is attached to the The sensing terminal 100 may determine whether the sensing terminal 100 is attached/detached by monitoring whether the sensing terminal 100 is attached to the target object 10 . Here, attachment means a state in which the sensing terminal 100 is attached to the target object 10 , and detachment means a state in which the sensing terminal 100 is not attached as the sensing terminal 100 is separated from the target object 10 .

4 is a diagram illustrating an external appearance of the sensing terminal 100 according to an embodiment. Figure 4 (a) shows the outer surface provided with the user interface 150 of the sensing terminal 100, Figure 4 (b) is a coupling unit for attaching the sensing terminal 100 to the target object (10) As 170, the attachment surface on which the double-sided tape is implemented is shown.

In an embodiment, the sensing terminal 100 may determine whether the sensing terminal 100 is attached by the operation of the detachable switch 141 located on the attachment surface of the sensing terminal 100 . When the sensing terminal 100 is attached to the object, the detachable switch 141 is maintained in a pressed state as the attachment surface of the object presses the detachable switch 141 , and the sensing terminal 100 is separated from the target object 10 . In this case, the attachment surface of the object may be maintained in a released state that is not pressed as the force for pressing the detachable switch 141 disappears. To show this result, the detachable switch 141 may have a shape that protrudes from the attachment surface than other components configured on the attachment surface of the sensing terminal 100, such as a double-sided tape.

When the detachable switch 141 is used, the sensing terminal 100 in the sleep mode wakes up when the detachable switch 141 is released, and the sensing terminal 100 may transmit whether the detachment or detachment is performed to an external device. By maintaining the sensing terminal 100 in the sleep mode until the detachable switch 141 is released, there is an effect that power consumption of the sensing terminal 100 for sensing whether the detachment is detached can be reduced. For example, when the detachable switch 141 is pressed, the circuit may be in an open state, and when the detachable switch 141 is released, the circuit may be in an energized state. When the power is on, the sensing terminal 100 in the sleep mode may wake up.

In another embodiment, the sensing terminal 100 may determine whether the sensing terminal 100 is attached by the operation of the illuminance sensor 142 located on the attachment surface of the sensing terminal 100 . As in the example of FIG. 4 , the illuminance sensor 142 may be located on or near the attachment surface of the sensing terminal 100 . Accordingly, when the sensing terminal 100 is attached to the target object 10, the illuminance sensor 142 can detect a lower illuminance value than when the sensing terminal 100 is separated from the target object 10. do. From this, when the illuminance value increases, the sensing terminal 100 may determine that the sensing terminal 100 is separated from the target object 10 .

The sensing terminal 100 may determine that the sensing terminal 100 is separated from the target object 10 when the illuminance value increases by more than a separation threshold value indicating separation. In order to reduce power consumption, the sensing terminal 100 may only perform sensing of the illuminance value when the illuminance value is less than the separation threshold, and may not store the sensed illuminance value in the memory 120 . The sensing terminal 100 determines that the sensing terminal 100 is separated from the target object 10 when the illuminance value is greater than or equal to the separation threshold, stores the sensed illuminance value in the memory 120, and the sensing terminal 100 The mode is changed from the sleep mode to the wake-up mode, and a message indicating that the sensing terminal 100 is separated from the target object 10 may be transmitted to an external device. In this case, since memory access is performed only when an illuminance value greater than or equal to the separation threshold is measured, power consumption of the sensing terminal 100 for sensing whether the device is detached or not is effective.

On the other hand, when the illuminance sensor 142 is used, when the illuminance sensor is defective, it is impossible to determine whether the sensing terminal 100 is detached because the illuminance value cannot be measured. To this end, even when the sensing terminal 100 is attached to determine whether the illuminance sensor 142 operates normally, a certain amount of light may be introduced into the illuminance sensor 142 .

In an embodiment, slits 171 and 172 through which a small amount of light may be introduced may be formed on the attachment surface of the sensing terminal 100 . The slit 171 may be formed in a portion of the coupling portion 170 . As in the example of FIG. 4 , the slit 171 may be formed in a concave shape in which a portion of the coupling part 170 is recessed, and external light is introduced along the recessed groove to reach the illuminance sensor 142 . It may be formed to extend from the outside (171a) of the 170 to the inside (171b). As a small amount of light flows into the illuminance sensor 142 through the slit 171 , the illuminance sensor 142 may sense a varying illuminance value in the state in which the sensing terminal 100 is attached, You can set the amount of illuminance value change to a illuminance value within the normal range. In order to set the illuminance value in the normal range, the sensing terminal 100 may measure the fluctuation range of the illuminance value for a preset period and set the illuminance value in the normal range according to the fluctuation range of the illuminance value. For example, the sensing terminal 100 may store the highest value among the illuminance values measured for a certain period after attachment as an illuminance value in the normal range in the memory 120 .

Accordingly, the sensing terminal 100 detects an operation error of the illuminance sensor 142 when the illuminance value of the illuminance sensor 142 is 0, and when the illuminance value of the illuminance sensor 142 is greater than 0 and the illuminance value in the normal range You can determine that it is working normally. The sensing terminal 100 performs only sensing of the illuminance value when the illuminance value of the illuminance sensor 142 is less than the separation threshold, and when the illuminance value of the illuminance sensor 142 is greater than or equal to the separation threshold, the sensing terminal 100 is the target object (10) and it can be determined that it is separated.

5A to 5B are diagrams illustrating patterns of illuminance values measured from the illuminance sensor 142 of the sensing terminal 100 . Figure 5a shows a reference pattern for distinguishing the forced detachment from the natural detachment. The reference pattern represents a change in illuminance value over time after the sensing terminal 100 is attached to the target object 10, and is indicated by a dotted line in FIGS. 5A and 5B. The sensing terminal 100 may determine the detachment type by comparing the elapsed time after the sensing terminal 100 is attached to the target object 10 and a threshold illuminance value specified according to a reference pattern. The sensing terminal 100 is a force detachment when the illuminance value over time indicates a value of the forced detachment area indicating a value greater than the threshold illuminance value, and the natural desorption area indicating a value equal to or smaller than the critical illuminance value. If a value is indicated, it can be determined by natural desorption. In FIG. 5B , the illuminance value measured over time is indicated by a red solid line.

In one embodiment, in the case of natural detachment in which the sensing terminal 100 is naturally separated from the target object 10 due to the decrease in the coupling force of the coupling unit 170 over time, the illuminance value of the illuminance sensor 142 It increases more slowly than this reference pattern. Accordingly, as in the example of (a) of FIG. 5B, the illuminance value graph is shown in the natural desorption area.

However, in the case of forced detachment in which the sensing terminal 100 is separated from the target object 10 due to an external force acting on the sensing terminal 100 in addition to the reduction in the coupling force of the coupling unit 170, the illuminance value of the illuminance sensor 142 is It increases more rapidly than the reference pattern. Accordingly, as shown in the example of FIG. 5b (b), the illuminance value graph is shown in the forced detachment area.

In another embodiment, the slit may be formed in two or more portions of the attachment surface. By providing different widths of the slits formed on the attachment surface, natural detachment and artificial detachment can be distinguished. For example, a first slit 171 and a second slit 172 may be formed in the coupling portion 170 as shown in FIG. 4 . The first slit 171 is located at the upper end with respect to the direction in which the sensing terminal 100 is attached to the target object 10 , and the second slit 172 is the sensing terminal 100 is attached to the target object 10 . It may be located at the bottom based on the direction. The width of the second slit 172 may be changed as shown in FIG. 4 . The second slit 172 may be formed to have a constant width from the outer side 172a to the middle point 172b of the coupling part 170, but the width from the middle point 172b to the inner side 171c is formed to increase uniformly. can be

When the separation of the sensing terminal 100 and the target object 10 occurs from the left end or the right end of the sensing terminal 100 based on the illustration of FIG. 4( b ), the inner boundary 173 of the coupling unit 170 . ), the amount of light flowing into the illuminance sensor 142 through the slits 171 and 172 does not change until separated. Therefore, when separation occurs from the left end or right end of the sensing terminal 100, the illuminance value measured by the illuminance sensor 142 sharply increases according to the separation of the inner boundary surface 173 of the coupling unit 170 and then maintained. will become

When the separation of the sensing terminal 100 and the target object 10 occurs at the upper end of the sensing terminal 100 based on the illustration of FIG. 4B , as the separation proceeds, the first slit 171 is The light path of the incoming light is shortened, and accordingly, the amount of light flowing into the illuminance sensor 142 is increased. Finally, the illuminance value measured by the illuminance sensor 142 according to the separation of the inner boundary surface of the coupling part 170 is maintained after a sharp increase.

When the separation of the sensing terminal 100 and the target object 10 occurs at the lower end of the sensing terminal 100 based on the illustration in (b) of FIG. 4 , through the second slit 172 as the separation proceeds. The fact that the light path of the incoming light becomes shorter is the same as the separation at the top.

However, when separation occurs at the bottom, the width of the slit increases from the midpoint 172b of the second slit 172 . As the width of the slit increases, the amount of incoming light also increases. While the separation occurs to the inner side 171c, the amount of light flowing into the illuminance sensor 142 increases significantly compared to the separation process at the top. Finally, the illuminance value measured by the illuminance sensor 142 according to the separation of the inner boundary surface of the coupling part 170 is maintained after a sharp increase.

In this way, by adding slits having different widths to the coupling unit 170 of the sensing terminal 100 , it is possible to measure the change in illuminance according to the separation direction of the sensing terminal 100 . When the sensing terminal is attached, the point at which the separation can start naturally is set to the top and attached to the target object 100. In some cases, it can be decided by forced removal.

In another embodiment, the detachable switch 141 and the illuminance sensor 142 may be used together to determine whether the sensing terminal 100 is detached or detached. By releasing the press of the detachable switch 141, whether detachment or detachment can be primarily identified. When detachment is primarily identified, the sensing terminal 100 may determine whether the sensing terminal 100 is detached or detached by checking whether the sensing value of the illuminance sensor 142 indicates a value greater than or equal to a preset separation threshold value.

In another embodiment, a direction sensor such as a gyro sensor or a geomagnetic sensor may be used to determine whether the sensing terminal 100 is detached or detached. The sensing terminal 100 is the sensing terminal 100 when the direction of the sensing terminal 100 sensed by the direction sensor is maintained in a direction different from the installed direction regardless of a change in the value of the detachable switch 141 or the illuminance sensor 142 . ) may be determined to be separated from the target object 10 . In order to specify the installed direction, the sensing terminal 100 may be installed only in a certain direction. Alternatively, after the sensing terminal 100 is installed, in the initial setting step, the sensing terminal 100 recognizes the direction in which the sensing terminal 100 is installed through the direction sensor and stores it in the memory 120 to specify the installed direction.

The server 200 may monitor whether the target object 10 deviates from a preset normal position by monitoring the position of the sensing terminal 100 . The server 200 may determine the location of the sensing terminal 100 based on the location of a base station communicatively connected to the sensing terminal 100 or may determine it using beacon communication. Since the sensing terminal 100 transmits only information of a base station or a beacon to the server 200 in order to transmit the location of the sensing terminal 100 , power consumption for location transmission can be reduced. When using beacon communication, the server 200 receives the ID of the beacon that the sensing terminal 100 receives from the surrounding beacon from the sensing terminal 100, and determines the position of the beacon identified using the beacon ID of the sensing terminal ( 100) can be determined. Hereinafter, a case in which the server 200 monitors whether the location of the target object 10 is deviated based on the location of the base station will be described.

The sensing terminal 100 may transmit information of a network base station to which a communication connection is established to the server 200 . The sensing terminal 100 may transmit the Cell ID of the corresponding base station as base station information when using a wireless communication network.

The server 200 may identify the location of the base station to which the sensing terminal 100 is connected based on the Cell ID. And, the server 200 may specify the position of the sensing terminal 100 by using a method such as triangulation based on the location of the base station to which the sensing terminal 100 is connected based on the Cell ID.

The server 200 may maintain in a memory a list of base stations to which the sensing terminal 100 can be connected in communication when it exists in a normal position. In the following description, a list of corresponding base stations is abbreviated as a safe cell. The safe cell may be set for each sensing terminal 100 . The server 200 may determine that the sensing terminal 100 is in a normal position when the base station to which the sensing terminal 100 is connected is included in the safe cell.

When the communication-connected base station is not included in the safe cell, the server 200 may add the communication-connected base station to the safe cell according to a predetermined criterion. In an embodiment, the server 200 may add the currently connected base station to the safe cell according to the number of base stations included in the safe cell of the sensing terminal 100 .

If the number of base stations added to the safe cell is less than or equal to a preset number when the communication-connected base station is not included in the safe cell, the server 200 may add the communication-connected base station to the safe cell. There is a case where the coverage overlaps for each base station, and when the target thing 10 moves and operates at the coverage boundary between the base stations, the sensing terminal 100 attached to the target thing 10 is frequently used between a limited number of multiple base stations. A handover may occur, in order not to determine that it has deviated from the normal position in each case.

If the number of base stations added to the safe cell is greater than or equal to a preset number when the communication-connected base station is not included in the safe cell, the server 200 may determine that the sensing terminal 100 has deviated from the normal position and has moved to the outside. For example, when the theft of the target object 10 occurs, the target object 10 is continuously moved a considerable distance. Even when the sensing terminal 100 is communicatively connected to a base station not included in the safe cell, the server 200 sends the sensing terminal 100 and the base station communication-connected to the safe cell up to a certain number of base stations without considering the actual location of the base station. add However, after a certain number of base stations are registered in the safe cell, when the sensing terminal 100 performs a communication connection with a base station not registered in the safe cell, it can be determined that the sensing terminal 100 has deviated from the normal position. .

In another embodiment, the server 200 may add the currently connected base station to the safe cell according to the operating time of the sensing terminal 100 . In an embodiment, the server 200 may add all base stations establishing a communication connection with the sensing terminal 100 to the safe cell within a preset time after the sensing terminal 100 starts operation. The server 200 may determine that the sensing terminal 100 has departed from the normal position when the sensing terminal 100 establishes a communication connection with a base station that is not registered in the safe cell after a predetermined time has elapsed. In this case, when a predetermined time has elapsed, the server 200 may update the safe cell by deleting information on the base station registered in the safe cell and re-registering the base station to be communicated with in the safe cell for a preset time.

In another embodiment, as described above, the server 200 may delete a base station for which a predetermined time has elapsed since registration in the safe cell while maintaining a certain number of base stations in the safe cell. To this end, the server 200 may register registration time information together when adding the base station to the safe cell. In this embodiment, if the number of base stations added to the safe cell is less than or equal to a preset number when the base station to which the communication is connected is not included in the safe cell, the server 200 can add the base station to the communication connected to the safe cell along with the registration time. have. If the number of base stations added to the safe cell is a preset number when the communication-connected base station is not included in the safe cell, the server 200 may determine that the sensing terminal 100 is out of the normal position.

In one embodiment, when the sensing terminal 100 establishes a communication connection with a base station not belonging to the safe cell, the server 200 determines the risk using the location of the currently connected base station and the locations of the base stations registered in the safe cell. Alternatively, the degree of risk may be determined using the location of the sensing terminal 100 measured through triangulation, etc. from the location of the base station currently connected to GPS or the location of the base stations registered in the safe cell.

If the location of the base station to which the sensing terminal 100 is currently connected is located within a preset safe distance from the locations of the base stations registered in the SafeCell, the sensing terminal 100 deviates from the normal position, but is in a non-hazardous state. it can be decided that On the other hand, when the location of the base station to which the sensing terminal 100 is currently connected is out of a preset safe distance from the reference location determined from the locations of the base stations registered in the SafeCell, the sensing terminal 100 is in a dangerous state. it can be decided that

The server 200 may identify the location of the currently connected base station based on the location information of the base station identified by Cell Id. The server 200 sets the position of the closest base station from the position of the currently connected base station among the base stations belonging to the safe cell as the reference position, or sets the position of the most distant base station as the reference position, or sets the intermediate position between the two base stations as the reference position. It can be set as a reference position. In another example, the server 200 may set the intermediate positions of the base stations belonging to the safe cell as the reference position. For example, coordinates calculated by arithmetic average of the longitudes and latitudes of the base stations, respectively, may be set as the reference position.

The mobile asset monitoring method according to the embodiment described above may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured according to the embodiment, or may be known and used by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

Each of the drawings referenced in the description of the previous embodiment is merely an embodiment shown for convenience of description, and items, contents, and images of information displayed on each screen may be modified and displayed in various forms.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims (10)

housing;
a coupling unit for coupling the target object and the housing;
a sensor unit generating sensing data for the target object;
a processor for generating transmission unit data to be transmitted to a server based on the sensed data; and
and a communication unit for transmitting the transmission unit data to a server,
The sensor unit includes a first sensor and a second sensor,
The processor applies a measurement start signal to the second sensor when receiving a detachment signal indicating that the housing is separated from the target object from the first sensor,
The processor is a sensing terminal for determining whether the housing is detached from the target object based on the measurement value of the second sensor. The method of claim 1,
The processor generates state data of the target object having a data size smaller than a data size of the sensed data based on the sensed data,
A sensing terminal in which the transmission unit data includes state data of the target object. The method of claim 1,
The second sensor is an illuminance sensor formed on one side of the housing,
The processor determines whether the sensing terminal is detached from the target object according to a change in the illuminance value measured using the illuminance sensor,
The processor is a sensing terminal for determining a detachment type in which the sensing terminal is detached from the target object according to a change in the illuminance value measured using the illuminance sensor. 4. The method of claim 3,
The processor compares the illuminance value measured from the illuminance sensor over time with a threshold illuminance value specified according to the lapse of time at which the illuminance value is measured after the sensing terminal is attached to the target object, thereby the detachment type to decide,
The processor is a sensing terminal for determining the forced detachment when the measured illuminance value is greater than the threshold illuminance value. 4. The method of claim 3,
The first sensor is a detachable switch formed on one side of the housing,
The processor applies an illuminance measurement start signal to the illuminance sensor when receiving a detachment signal from the detachable switch,
The processor determines whether the sensing terminal is detached from the target object according to a change in the illuminance value measured from the illuminance sensor,
The illuminance sensor is a sensing terminal that does not sense the illuminance before receiving the illuminance measurement start signal from the processor. 4. The method of claim 3,
The illuminance sensor does not store the illuminance value in the memory when the measured illuminance value is less than a preset threshold value,
The illuminance sensor stores the illuminance value in a memory when the measured illuminance value is greater than or equal to a preset threshold, and applies a detachment signal to the processor. 4. The method of claim 3,
The coupling part further comprises a slit,
The illuminance sensor is a sensing terminal for sensing the illuminance value by the light flowing through the slit even when the sensing terminal is attached to the target object. The method of claim 1,
The second sensor is a sensing terminal that does not perform measurement before receiving a measurement start signal from the processor. A method for monitoring a target object using a sensing terminal, the method comprising:
generating sensing data for the target object;
generating transmission unit data to be transmitted to a server based on the sensed data; and
Transmitting the transmission unit data to a server,
The sensing terminal includes a first sensor and a second sensor,
The step of generating sensing data for the target object includes:
when a detachment signal indicating that the sensing terminal is separated from the target object is generated from the first sensor, applying a measurement start signal to the second sensor; and
and determining whether the sensing terminal is detached from the target object according to the measurement value of the second sensor. A computer-readable recording medium in which a computer program written to perform the method for monitoring a target object of claim 9 is recorded.

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