JP2004114893A - Anti-theft device, and anti-theft system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-theft device, and an anti-theft system, to make it impossible for a thief getting a code number for driving a vehicle to drive the vehicle using the code number at other places than a place where it has been stolen for using it. <P>SOLUTION: In a hydraulic shovel 100, a plurality of operable areas each in which operation of the hydraulic shovel 100 is permitted, code numbers for the respective operable areas, and terms of validity for the respective code numbers can be set to be stored in the storing range of a starting condition memory 35. Only when the current position of the hydraulic shovel 100 is within the operable area stored in the starting condition memory 35, with the same number as the code number set for the operable area inputted from an input device 50, and within the term of validity set for the operable range and the code number, then a vehicle body action determination part 31 puts a starter relay 7 on to make an engine 2 startable. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-theft device and an anti-theft system suitable for use in construction machines, which prevent theft.
[0002]
[Prior art]
As a construction machine equipped with an anti-theft device, for example, if a predetermined password is not input from a key input device, the starter circuit does not operate even if the engine start operation is performed, and the start of the engine is prohibited. Things are known.
[0003]
[Patent Document 1]
Japanese Patent No. 3233573
[0004]
[Problems to be solved by the invention]
An operator who operates a construction machine equipped with such an anti-theft device pastes a memo with a password near the driver's seat so that the user cannot forget the password, and looks at the memo while stolen. The safety device may be unlocked. In such a case, a thief who notices the presence of the memo may steal the construction machine.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to prevent a thief who obtains a drivable personal identification number from stealing a vehicle and using it in another place, so that it is not possible to drive with the personal identification number obtained by the thief at a destination to which the thief has moved. And to provide an anti-theft system.
[0006]
[Means for Solving the Problems]
(1) The anti-theft device according to the first aspect of the present invention stores position detecting means for detecting a current position of a vehicle, and operable region information including at least one operable region and a password associated with the operable region. Comparing the current position of the vehicle detected by the position detection unit with the operable area information stored in the storage unit, and storing the current position of the vehicle in the storage unit. Operable area (hereinafter, referred to as a current position operable area) which is within the operable area included in the operable area information stored in the storage area and includes the personal identification number input from the input means and the current position of the vehicle. The system outputs a vehicle driving permission signal when it is determined that the number input from the input means matches with the password associated with the current position operable area. And control means.
(2) The invention according to claim 2 is the anti-theft device according to claim 1, further comprising a clock means for clocking the current date and time, wherein the operable area information stored in the storage means is associated with the operable area. The control means further compares the current position of the vehicle detected by the position detection means with the operable area information stored in the storage means, and the current position of the vehicle is stored in the storage means. The password is within the operable area included in the operable area information stored in the storage area, and is compared with the password input from the input means and the password associated with the current position operable area, and input from the input means. Is determined to match the password associated with the current position operable area, and the current date and time measured by the timer and the validity period of the password associated with the current position operable area And if it is determined that the current date and time is within the validity period of the personal identification number, a vehicle driving permission signal is output.
(3) According to a third aspect of the present invention, in the antitheft device according to the first or second aspect, the display means for displaying the operable area information stored in the storage means and the operable area information are changed. When the determining means for determining whether the operation is a specific operation by an authorized person and the determining means determine that the specific operation by an authorized person for changing the operable area information are performed, the operation stored in the storage means is performed. Mode setting means for setting a setting change mode for permitting rewriting of the available area information based on the information input by the input means, wherein the control means sets the setting change mode by the mode setting means. Displaying the operable area information stored in the storage means on the display means, and operable area information stored in the storage means based on the information input by the input means. Is rewritten.
(4) The invention according to claim 4 is the anti-theft device according to any one of claims 1 to 3, further comprising communication means for transmitting and receiving data to and from the outside, wherein the control means stores the data in the storage means. When the operable area update information for updating the stored operable area information is externally received by the communication means, the operable area information stored in the storage means is updated with the operable area update information. And
(5) An anti-theft system according to a fifth aspect of the present invention includes the anti-theft device according to the fourth aspect, and a center server that transmits operable area update information to the anti-theft device.
(6) The invention of claim 6 is the anti-theft system according to claim 5, further comprising a personal computer for transmitting the operable area update information to the center server.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment in which the present invention is applied to a construction machine anti-theft device will be described with reference to FIGS. A description will be given using a hydraulic shovel as an example of a construction machine. FIG. 1 is an overall configuration diagram in the present embodiment. In the present embodiment, when starting the engine of the excavator 100, the input personal identification number is collated, and the engine start is permitted only when the collation result is good. As will be described in detail later, in the present embodiment, the password input when starting the engine is a password set in association with each preset operable area of the excavator 100.
[0008]
The excavator 100 can communicate with a center server 200 installed in a construction machine maker (hereinafter, referred to as a maker) via a communication antenna 250 via a communication antenna 10. The excavator 100 receives a GPS signal from the GPS satellite 300 via the GPS antenna 20. A company that owns and manages the excavator 100, for example, a company to which the user who purchased the excavator 100 belongs, and a company that owns the excavator 100, such as a construction equipment rental company (trader) (hereinafter, a user) A personal computer 150 is installed in the company. The center server 200 installed in the manufacturer and the personal computer 150 installed in the user company can communicate with each other via the Internet 400.
[0009]
FIG. 2 is a system block diagram of the excavator 100. The excavator 100 includes an engine 2 that drives the excavator 100, a starter motor 3 that starts the engine 2, a starter relay 7 that turns on and off the power of the starter motor 3, an engine key switch 6, and an engine key switch 6. , A key switch starter relay 5 for turning on and off the power from the battery 4 by the operation of, a control device 30, a monitor 40, and an input device 50. The starter relay 7 is interposed between the starter motor 3 of the engine 2 and the engine key switch starter relay 5. When the engine key switch starter relay 5 is turned on with the operation of the key switch 6 when the starter relay 7 is turned on, the starter motor 3 is driven and the engine 2 is started. On the other hand, when the starter relay 7 is off, the starter motor 3 is not energized even if the engine key switch 6 is operated, and the engine 2 is not started. The engine 2 drives a hydraulic pump (not shown) and controls oil discharged from the pump by a control valve, thereby driving various actuators to perform excavation work, running, turning, and the like.
[0010]
The control device 30 includes a vehicle body operation determination unit 31, a power control unit 32, a communication control unit 34, a start condition storage unit 35, a time measurement unit 36, and a position calculation unit 37. The starter relay 7 and the input device 50 are connected to the vehicle body operation determination unit 31. The vehicle body operation determination unit 31 determines whether the password assigned to the current position of the excavator 100 calculated by the position calculation unit 37 and the number input from the input device 50 match the conditions described later. An operation permission signal is output, and the starter relay 7 is turned on. At this time, when the engine key switch 6 is operated, the starter motor 3 is driven, and the engine 2 is started. The monitor 40 displays the content input from the input device 50, and displays various information related to the excavator 100, such as a cooling water temperature and an integrated operation time.
[0011]
The engine key switch 6 is connected to the power control unit 32. When the engine key switch 6 is turned on, the power control unit 32 turns on the power of the control device 30. The communication control unit 34 is connected to the communication antenna 10 and communicates with the center server 200 via the communication network 250 as described later. The time measuring unit 36 measures the date and time. The data of the time measurement unit 36 is used for comparison with the validity period of the personal identification number described later. The position measuring unit 37 calculates the current position of the excavator 100 based on the GPS signal received by the GPS antenna 20. When determining whether or not the excavator 100 is within an operable area in which the operation of the excavator 100 to be described later is permitted, data of the calculated current position is used.
[0012]
The hydraulic shovel 100 is assigned an identification ID that is assigned to each hydraulic shovel and identifies each hydraulic shovel. This identification ID is used as a number for identifying each excavator when data is transmitted from the personal computer 150 to the excavator 100 via the center server 200, as described later. When the user company registers as a user with the construction machine manufacturer, a user ID and a password are issued from the construction machine manufacturer. The user ID and the password are necessary for user authentication when a manager of a user company or the like accesses the center server 200 from the personal computer 150 as described later.
[0013]
In the excavator 100 equipped with the anti-theft device according to the above-described embodiment, a plurality of operable areas in which the operation of the excavator 100 is permitted can be set. Then, a password and a validity period of the password can be set for each of the set operable areas. The operable area, the password and the validity period (referred to as operable area information) are stored in the storage area of the starting condition storage unit 35, and only when all of the following conditions are satisfied, the vehicle body operation determining unit 31 turns on the starter relay 7 so that the engine 2 can be started.
(1) The measured current position of the excavator 100 is within the operable area stored in the starting condition storage unit 35.
(2) The same number as the password set in the operable area is input from the input device 50.
(3) The validity period set for the operable area and the password is within the validity period.
[0014]
The setting of the operable area information of the excavator 100 can be set by the construction machine management manager of the user company from the personal computer 150. The construction machine manager accesses the center server 200 from the personal computer 150 via the Internet 400 to make settings. The screen of the personal computer 150 shown in FIG. 1 shows an image of a setting screen when the personal computer 150 accesses the center server 200. The screen of the personal computer 150 shown in FIG. 1 includes a frame for setting a password and a use start period and an end period of a password in each of a plurality of operable areas, and a frame indicating a plurality of operable areas on a Japan map. Is displayed.
[0015]
First, a construction machine manager or the like of the user company determines an operable area of the excavator 100, and sets a password and a validity period of the password for the determined operable area. The operable area is set by designating a rectangular setting area that includes each prefecture on the screen of the personal computer 150 in FIG. For example, when setting an operable area in Tokyo, a rectangular area including Tokyo is selected and designated from the screen of the personal computer 150 in FIG. Note that, for example, the rectangular area including Tokyo includes a part of other prefectures adjacent to Tokyo, so that there is no problem in performing work near the prefectural border. The same applies to other prefectures.
[0016]
The personal identification number is, for example, a combination of five digits, and is set from the personal computer 150 as described above. The validity period of the personal identification number is a start period in which the use of the personal identification number can be started and an end period in which the use of the personal identification number ends, and by setting from the personal computer 150 as described above, the period in which the personal identification number can be used is set. specify.
[0017]
When the setting is completed, the setting result is transmitted from the center server 200 to the excavator 100. The excavator 100 that has received the setting result stores the reception result in the starting condition storage unit 35. Hereinafter, processing performed by the excavator 100 equipped with the anti-theft device of this embodiment and the anti-theft system will be described with reference to FIGS.
[0018]
FIG. 3 is a flowchart illustrating an engine start process of the excavator 100. This process is performed by a program executed by the vehicle body operation determination unit 31 of the control device 30. When the engine key switch 6 is turned on, this program is started, and the process stands by until a password is input to the input device 50 in step S101. When it is determined that the password has been input, the process proceeds to step S103, where the input password is temporarily stored as the input password, and the process proceeds to step S105. In step S105, the current position information of the excavator 100 calculated by the position calculator 37 is read, and the process proceeds to step S107. In step S107, it is determined whether the current position of the excavator 100 read in step S105 corresponds to any of the preset operable regions. If step S107 is affirmatively determined, the process proceeds to step S109, in which an operable area including the current position of the excavator 100 (hereinafter, referred to as a current position operable area) among a plurality of operable areas set in advance. It is determined whether or not the set password (hereinafter, referred to as a current position password) matches the input password. When step S109 is affirmatively determined, the process proceeds to step S111, where the current time is read from the time measuring unit 36, and the process proceeds to step S113. In step S113, it is determined whether or not the current time read in step S111 corresponds to the valid period of the password set in the current position operable area and the current position password (hereinafter, referred to as the current position valid period). to decide. When step S113 is affirmed, the process proceeds to step S115, in which a signal for turning on the starter relay 7 is output, and the process ends.
[0019]
If a negative determination is made in any of steps S107, S109, and S113, the process proceeds to step S117, and the process ends without outputting a signal for turning on the starter relay 7, that is, while keeping the starter relay 7 off.
[0020]
According to the above-described processing, the current position of the excavator 100 corresponds to one of the plurality of operable regions included in the operable region information stored in the starting condition storage unit 35, and the current position operation is performed. If the current position password set in the possible area matches the password input from the input device 50 and the current time corresponds to the current position validity period, the starter relay 7 is turned on and the engine 2 Start is possible.
[0021]
FIG. 4 is a flowchart showing the operation of the personal computer 150 when accessing the center server 200 from the personal computer 150 installed in the user company and setting the operable area information. In step S151, the process waits until connection to the center server 200 via the Internet network 400 is made. If it is determined that the connection to the center server 200 has been established, the process proceeds to step S153, and waits until a user ID and password for specifying the user are input. If it is determined that the user ID and password have been input, the process proceeds to step S155, where the user ID and password input in step S153 are transmitted to center server 200, and the process proceeds to step S157. In step S157, the process waits until an identification ID for specifying the excavator 100 to be set is input. If it is determined that the identification ID has been input, the process proceeds to step S159, where the identification ID input in step S157 is transmitted to the center server 200, and the process proceeds to step S161. In step S161, it is determined whether the setting of the operable area information is a new input or a change of the content already input. When it is determined that the input is a new input, the process proceeds to step S163, and the fact that the request is a new input is transmitted to the center server 200, and then the process proceeds to step S165. In step S165, the process waits until a connection to a new input page of the center server 200 is established. If it is determined that the page has been connected to the page for new input, the process proceeds to step S167, and waits until a new setting is input. If it is determined that a new setting has been input, the process proceeds to step S169.
[0022]
If it is determined in step S161 that the input is a change input of the content already input, the process proceeds to step S173, and the fact that the request is a change input input of the content already input is transmitted to the center server 200, and the process proceeds to step S175. In step S175, the process waits until connection to the change input page of the center server 200 is made. If it is determined that the page has been connected to the change input page, the process advances to step S177 to wait until there is a change input of the content already input. If it is determined that a change input has been made, the process proceeds to step S169.
[0023]
In step S169, the content input in step S167 or S177 is transmitted to center server 200, and the flow advances to step S181 to determine whether to terminate the connection to center server 200. If a negative determination is made in step S181, the process returns to step S157, and if a positive determination is made in step S181, the connection to the center server 200 is terminated and the process is terminated.
[0024]
According to the above-described processing, the operable area information of the excavator 100 can be set from the personal computer 150 installed in the user company. First, the personal computer 150 accesses the center server 200 via the Internet 400. After the user authentication, the setting change target device is specified by inputting the identification ID. After selecting whether a new input or a change of the content already input is made, the operable area, the password, and the validity period of the password are set and transmitted to the center server 200. The center server 200 temporarily stores the content of the received setting as described later, and then transmits it to the excavator 100 via the communication network 250.
[0025]
FIG. 5 is a flowchart showing the operation of the center server 200 that has been accessed from the personal computer 150 installed in the user company. In step S201, the process waits until there is access from the personal computer 150. If it is determined that there is access from the personal computer 150, the process proceeds to step S203, and waits until a user ID and a password are received. If it is determined that the user ID and the password have been received, the process proceeds to step S205, and it is determined whether the received user ID and the password match those registered (stored) in advance. If a negative determination is made in step S205, the process returns to step S203. If an affirmative determination is made in step S205, the process proceeds to step S207, and waits until an identification ID for specifying the excavator is received. If it is determined that the identification ID has been received, the process proceeds to step S209, and it is determined whether the request is a new setting input request or a change request of already input contents. If it is determined that the request is a new setting input request, the process proceeds to step S211 to present the browsing screen prepared for the new input to the personal computer 150, and then proceeds to step S213. In step S213, the process waits until new input contents (operable area, password, valid period) are received. If it is determined that the new input content has been received, the process proceeds to step S215.
[0026]
If it is determined in step S209 that the change request has already been made, the process proceeds to step S221, where a browse screen prepared for change input is presented to the personal computer 150, and the process proceeds to step S223. In step S223, the process waits until the change input contents (operable area, password, valid period) are received. If it is determined that the change input content has been received, the process proceeds to step S215. In step S215, the setting content received in step S213 or step S223 is stored, and the process proceeds to step S231. In step S231, the setting content received in step S213 or step S223 is transmitted to the excavator 100 together with the identification ID of the excavator 100 as operable area update information. In step S233, it is determined whether there is a connection termination request. If a negative determination is made in step S233, the process returns to step S207. If an affirmative determination is made in step S233, the process proceeds to step S235, where the connection with the personal computer 150 is terminated, and a series of operations is terminated.
[0027]
According to the above-described processing, the center server 200, which has been accessed from the personal computer 150 installed in the user company, sets the setting contents (operable area, password, and validity period of the password, transmitted from the personal computer 150). That is, the operable area update information can be transmitted to the excavator 100 via the communication network 250. After performing user authentication from the user ID and password received from the accessed personal computer 150, the device receives the identification ID and specifies the setting change target device. After determining whether the request is a new input request or a request to change the content already input, the setting contents of the operable area, the password, and the validity period of the password are received. The received setting contents are temporarily stored and transmitted to the excavator 100 via the communication network 250.
[0028]
FIG. 6 is a flowchart illustrating the operation of the excavator 100 that has received the operable area update information from the center server 200 via the communication network 250. This process is performed by a program executed by the vehicle body operation determination unit 31 of the control device 30. When power is supplied from the battery 4 to the control device 30, this program is started. In step S121, the process waits until a signal transmitted from center server 200 is received. When it is determined that the signal transmitted from center server 200 has been received, the process proceeds to step S123, and it is determined whether or not the identification ID included in the received signal matches the identification ID of the own vehicle. If a negative determination is made in step S123, the process returns to step S121. If an affirmative determination is made in step S123, the process proceeds to step S125, in which the operable area update information (operable area, password, and validity period of the password) that has received the operable area information stored in the starting condition storage unit 35. To end the series of operations.
[0029]
By the above-described processing, the excavator 100 stores the setting of the operable area, the password, and the validity period of the password received from the center server 200 in the starting condition storage unit 35.
[0030]
The excavator 100 according to the above-described embodiment stores the operable area, the password, and the validity period of the password set by the personal computer 150 installed in the user company in the center server 200 and the communication line. The data can be transmitted to the excavator 100 via the net 250. The excavator 100 that has received and stored the setting contents starts the engine only when all of the current position, the current time, and the password input by the operator of the excavator 100 match the stored setting contents. 2 can be started.
[0031]
The hydraulic excavator 100 according to the embodiment described above has the following operational effects.
(1) The engine 2 can be started only when all of the current position, the current time, and the password input by the operator of the excavator 100 match the stored settings. Even if a thief who knows the password steals the hydraulic excavator 100 and takes it out of the operable area, the engine 2 cannot be started. In addition, the engine 2 cannot be started even after the set validity period has passed. Thereby, starting of the excavator 100 by a thief can be prevented, and the security is high.
(2) A plurality of operable areas can be set, and a password and a validity period of the password can be set for each set operable area. Accordingly, when a rental contractor or the like lends the hydraulic excavator 100, if a plurality of operable areas are initially set, the excavator 100 can be leased to a plurality of borrowers without returning the hydraulic excavator 100 to the rental contractor. , Lending can be done efficiently. Also, an operable area including a construction machine management place of the user company can be set. The construction machine management manager of the user company can start the excavator 100 with the password set in the area including the company without performing any special operation on the excavator 100 returned to the construction machine management place. Since it can be performed, the inconvenience that the engine cannot be started because the password is not known can be solved.
(3) The operable area of the excavator 100, the password, and the validity period of the password can be set from the personal computer 150 provided in the user company via the center server 200 and the communication network 250. Thereby, the construction machine manager does not have to go to the hydraulic excavator and can set the efficiency efficiently. Also, even if the rental company rents the hydraulic excavator 100 and the borrower requests to extend the rental period, the rental excavator 100 does not need to go to a remote excavator and can be set efficiently.
[0032]
In the excavator 100 according to the above-described embodiment, the operable area, the password, and the validity period are set from the personal computer 150 provided in the user company, but are not limited thereto. The setting may also be made by the monitor 40 and the input device 50 connected to the control device 30 of the excavator 100. In this case, in step S115 in FIG. 3, from the state where the engine 2 can be started, an operation known only to a limited person such as a construction machinery manager or an operation for inputting a specific password (specifying these operations by a specific operation) ), A setting change mode of an operable area, a password, and a validity period is provided. In the setting change mode, an input screen similar to the screen of the personal computer 150 shown in FIG. 1 may be displayed on the monitor 40 of the excavator 100 so that the setting can be input from the input device 50. Thereby, the operable area information of the excavator 100 used in the area where the communication state is poor can be updated. In addition, since only those who can know the specific operation can update, the security against a change by a third party or the like is high.
[0033]
Except when all of the current position of the excavator 100, the current time, and the password input by the operator match the stored settings, the start of the engine 2 is prohibited by not turning on the starter relay 7. Although an example is shown, the present invention is not limited to this. For example, as described in Japanese Patent No. 3233573, the hydraulic excavator 100 may not be able to travel by cutting off the pilot hydraulic circuit. Specifically, a switching valve (for example, a solenoid valve) is provided in the discharge circuit of the pilot hydraulic pump, and the switching valve is set to the communication position when all the starting conditions are satisfied, and otherwise, the switching valve is set. May be switched to the cutoff position. When the switching valve is in the shut-off position, even if each operating member is operated, the traveling hydraulic motor and other attachments and the turning actuator are not driven, so that theft can be prevented.
[0034]
The personal identification number has been described as an example of a numeral, but may be any one of a character and a symbol, or a combination thereof, and may be an ID number or a password that can be identified by a person who is authorized to start. Just fine. Instead of the on-vehicle communication control unit 34, a mobile phone, a personal digital assistant (PDA), or a mobile personal computer may be used. Further, the setting contents may be directly transmitted from the personal computer 150 to the excavator 100 via the Internet network 400 or the communication network 250 without providing the center server 200. Further, a personal digital assistant (PDA) or a mobile personal computer may be used instead of the personal computer 150. In this case, a construction machine manager or the like may transmit the setting contents to the excavator 100 from a communication unit connected to a personal digital assistant (PDA) or a mobile personal computer near the excavator 100.
[0035]
In the above-described embodiment and its modified examples, the operable area that can be set is set substantially in the unit of prefecture, but is not limited to this. The unit may be a municipal unit or an arbitrary range on the map displayed on the screen may be specified. Also, it is not limited to Japan. In the above-described embodiment and its modifications, the operable area information includes the operable area, the password, and the validity period, but is not limited thereto. The setting of the validity period may not be performed. In the above-described embodiment and its modifications, one password and one validity period are set for one operable area, but a plurality of passwords and validity periods are set for one operable area. You may be able to. The above-described embodiments and modified examples may be combined. In the above-described embodiments and modified examples, the description has been made using the hydraulic shovel as the construction machine, but the present invention is not limited to this. Also, it is not limited to construction machinery. The present invention can be applied to various moving objects such as a vehicle lent to a user such as a rental car. Furthermore, the present invention is not at all limited to the above-described embodiments as long as the characteristic functions of the present invention are not impaired.
[0036]
In each of the above-described embodiments and their modifications, the storage means corresponds to the starting condition storage unit 35, the input means corresponds to the input device 50, the time measurement means corresponds to the time measurement unit 36, and the display means corresponds to the monitor 40. The communication means includes the communication antenna 10 and the communication control unit 34. The position detecting means includes the GPS antenna 20 and the position calculating unit 372. The control unit, the determination unit, and the mode setting unit are realized by a vehicle body operation determination unit 31 and a program executed by the vehicle body operation determination unit 31.
[0037]
【The invention's effect】
According to the present invention, only when the current position of the vehicle is within the set operable area and the input password matches the password associated with the operable area information, Driving becomes possible. As a result, even if a thief who obtains a drivable personal identification number steals the vehicle and tries to use it elsewhere, it is impossible to drive with the personal identification number obtained at the destination where he moved
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an embodiment in which the present invention is applied to a hydraulic shovel.
FIG. 2 is a system block diagram of the excavator 100 of FIG.
FIG. 3 is a flowchart showing an engine start process of the excavator 100 of FIG.
FIG. 4 is a flowchart showing an operation of the personal computer 150 of FIG.
FIG. 5 is a flowchart showing an operation of the center server 200 of FIG. 1;
FIG. 6 is a flowchart showing an operation performed by the excavator 100 when the excavator 100 of FIG. 1 receives setting contents from the center server 200.
[Explanation of symbols]
2 Engine 3 Starter motor
5 Key switch starter relay 6 Engine key switch
7 Starter relay 10 Communication antenna
Reference Signs List 20 GPS antenna 30 Control device
31 body operation determination unit 32 power supply control unit
34 Communication control unit 35 Start condition storage unit
36 Time measurement unit 37 Position calculation unit
40 monitor 50 input device
100 Hydraulic excavator 150 Personal computer
200 center server 250 communication network
300 GPS satellite 400 Internet network

Claims (6)

Position detection means for detecting the current position of the vehicle,
Storage means for storing operable area information including at least one operable area and a password associated with the operable area;
Input means for inputting a password,
The current position of the vehicle detected by the position detection means is compared with the operable area information stored in the storage means, and the current position of the vehicle is stored in the operable area information stored in the storage means. A password associated with the operable area (hereinafter, referred to as a current position operable area) that is included in the operable area and that is input from the input means and includes the current position of the vehicle. And control means for outputting a vehicle driving permission signal when it is determined that the number input from the input means matches the password associated with the current position operable area. apparatus. The anti-theft device according to claim 1,
It further has a timing means for timing the current date and time,
The operable area information stored in the storage unit further includes a validity period of a password associated with the operable area,
The control unit compares the current position of the vehicle detected by the position detection unit with the operable area information stored in the storage unit, and the current position of the vehicle is stored in the storage unit The password is within the operable area included in the operable area information, and is compared with the personal identification number input from the input means and the personal identification number associated with the current position operable area, and is input from the input means. Is determined to match the password associated with the current position operable area, and the current date and time measured by the timing means and the validity period of the password associated with the current position operable area An anti-theft device that performs a comparison and outputs a vehicle driving permission signal when it is determined that the current date and time is within the validity period of the password. In the anti-theft device according to claim 1 or 2,
Display means for displaying the operable area information stored in the storage means,
Determining means for determining whether or not a specific operation by a person authorized to change the operable area information,
When the determination unit determines that the specific operation has been performed by a person authorized to change the operable region information, the operable region information stored in the storage unit is determined based on the information input by the input unit. Mode setting means for setting a setting change mode that permits rewriting by rewriting.
When the setting change mode is set by the mode setting means, the control means displays the operable area information stored in the storage means on the display means, and displays the operable area information on the information input by the input means. An anti-theft device that rewrites the operable area information stored in the storage means based on the information. The anti-theft device according to any one of claims 1 to 3,
Further comprising communication means for transmitting and receiving data to and from the outside,
The control means, when operable area update information for updating the operable area information stored in the storage means is received from the outside by the communication means, the operable area information stored in the storage means An anti-theft device characterized by updating with the operable area update information. An anti-theft device according to claim 4,
A center server for transmitting the operable area update information to the anti-theft device. The anti-theft system according to claim 5,
A theft prevention system further comprising a personal computer that transmits the operable area update information to the center server.

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