JP5531361B2 - Construction machine anti-theft device and anti-theft system - Google Patents

Description

  The present invention relates to a construction machine anti-theft device and anti-theft system, and more particularly to a construction machine anti-theft device and anti-theft system that commands operation locking / unlocking of a construction machine by remote control.

  Construction machines such as hydraulic excavators are expensive, and anti-theft measures are important. Conventionally, a password verification type anti-theft device is common. However, other anti-theft measures are also being considered due to the complexity of PIN management. In addition, construction machines are often left at work sites in remote locations, and monitoring is difficult at all times, so further anti-theft measures are being considered.

  For example, a theft prevention system using the following two theft prevention measures and other theft prevention measures together can be considered. As a first countermeasure, a theft prevention device having a GPS position detection function is installed in a construction machine. Construction machines generally do not travel long distances and have a limited moving area. The management server installed in the base station presets the movement area of the construction machine, constantly receives the position information of the construction machine via the communication network, and confirms that the construction machine is within the set movement area. . When the construction machine is stolen and taken out of the set movement area, the management server detects that the construction machine is outside the set movement area, and transmits a lock command to the anti-theft device via the communication network. The antitheft device transmits a lock command to the vehicle body controller of the construction machine. Based on the lock command, the vehicle body controller performs engine system shutdown, hydraulic system shutdown, and operation pilot system shutdown processing. Thereby, since the operation of the construction machine is locked, theft can be prevented. A theft prevention system using the first countermeasure is disclosed in Patent Document 1.

  However, the first countermeasure cannot cope with the misuse of construction machines in the moving area. As a second countermeasure, the management server transmits a lock command as necessary. The anti-theft device receives the lock command via the communication device and transmits the lock command to the vehicle body controller. Thereby, the operation of the construction machine is locked. On the other hand, if there is no problem, the management server transmits a lock release command. The antitheft device receives the lock release command and transmits the lock release command to the vehicle body controller. This allows the construction machine to operate. As a result, theft can be prevented even in the moving area.

  With respect to the antitheft device as described above, it is conceivable that the theft destroys the antenna of the GPS device or communication device, for example, cuts the antenna wiring. The antenna is often installed in a place where it can be easily seen from the outside of the construction machine, and is easily detected by theft. When the GPS antenna is destroyed, the anti-theft device cannot detect the position of the construction machine. Further, when the antenna of the communication device is destroyed, the anti-theft device cannot receive a lock command from the management server. That is, the antitheft device will not function.

  Assuming such an act of the theft, Patent Document 2 proposes a new theft prevention system. The anti-theft device described in Patent Document 2 has a disconnection detection wiring. The disconnection detection wiring, the antenna wiring of the GPS device, and the antenna wiring of the communication device are bundled to form a concentrated cable, and the disconnection detection is detected at the end of the disconnection detection wiring. Is provided. Although the installation potential level is input to the disconnection detection unit when there is no disconnection, a high voltage is applied when the disconnection occurs, whereby the disconnection detection unit detects disconnection. When a thief cuts the collecting cable in an attempt to cut the antenna wiring of the GPS device or the antenna wiring of the communication device, the disconnection detection wiring is cut at the same time, and the disconnection detecting unit detects the disconnection. The antitheft device outputs a lock command to the vehicle body controller based on the disconnection detection information. Thereby, since the operation of the construction machine is locked, theft can be prevented.

JP 2003-206554 A Japanese Patent No. 4190169

  As described above, the antitheft device described in Patent Document 2 functions effectively for an act of a theft person cutting the antenna wiring of the GPS device or the communication device. However, the theft can also try to steal in other ways.

  By the way, a communication device mounted on a construction machine performs transmission / reception with a management server installed in a base station via a communication network such as a mobile phone network. At this time, in order to distinguish between the communication device and a third-party communication device, unique identification information is assigned to each communication device. Specifically, a unique identification number is assigned to a SIM (subscriber identity module) card inserted in the communication device.

  When the theft person pulls out the SIM card inserted in the communication device, the communication device cannot be identified, and therefore the communication device cannot perform transmission / reception with the management server. That is, the anti-theft device cannot receive the lock command from the management server and does not function.

  As described above, the antitheft device described in Patent Document 2 has a problem that the theft cannot cope with the act of extracting the SIM card.

  An object of the present invention is to provide a theft prevention device and a theft prevention system for a construction machine that can determine whether a SIM card inserted in a communication device of the construction machine is removed and prevent the theft of the construction machine.

(1) In order to achieve the above object, the present invention inputs a command information via a communication unit that inputs / outputs from / to an external communication device, and performs arithmetic processing based on the command information. In the antitheft device for construction equipment comprising a control unit having a first calculation processing function and a command output unit for outputting the calculation result, the communication device is assigned to be distinguished from other communication devices. The control unit further has a second calculation processing function for inputting the unique identification information from the communication device via the communication unit and performing calculation processing based on the identification information. .

  In the prior art, when a thief pulls out the SIM card of the communication device, there is a problem that the lock command from the management server cannot be received and the construction machine cannot be prevented from being stolen. In the present invention configured as described above, when the thief pulls out the SIM card of the communication device, the second calculation processing function of the anti-theft device determines that the identification information cannot be recognized. Thereby, the construction machine is locked and the theft of the construction machine can be prevented.

  (2) In the above (1), preferably, the second calculation processing function performs calculation processing based on the presence or absence of identification information.

  Thereby, it is determined that the second calculation processing function cannot recognize the identification information.

  (3) In the above (1), preferably, further comprising a storage unit for storing a second identification number, wherein the second arithmetic processing function is a first identification number of the communication device and a second identification number input from the storage unit. And match.

  Thereby, it is determined that the second calculation processing function cannot recognize the identification information. In particular, when a thief inserts a SIM card of another communication device, it is determined that the identification number verification does not match.

  (4) In the above (1), preferably, an input unit for inputting from an external device is further provided, and the control unit further inputs outside air temperature information via the input unit, and the input outside air temperature is a threshold value. If it is less than the value, it has a low temperature processing function for outputting a lock release command via the command output unit.

  If there is no low temperature processing function, there is a possibility that the communication device does not operate at low temperatures and the second arithmetic processing function cannot determine the identification information. Therefore, when the low temperature processing function outputs a lock release command, the construction machine can be started.

  (5) In the above (4), preferably, further comprising a password verification unit that performs verification based on password input information, and the low temperature processing function operates the password verification unit when the input outside air temperature is less than a threshold value. If the password verification matches, a lock release command is output via the command output unit.

  When the temperature is low, the second arithmetic processing function does not operate, and even a thief can start the construction machine. Therefore, the password verification means operates to prevent the construction machine from being stolen.

(6) In order to achieve the above object, the present invention is a construction machine antitheft system that commands the operation lock and the operation lock release of a construction machine by remote control, and is installed in a base station away from the construction machine. A management server that transmits command information, a communication device that is mounted on a construction machine and receives command information, a theft prevention device having a first calculation processing function for performing calculation processing based on the command information, and the theft prevention device Operation lock / operation lock release means for operation lock / operation lock release of the construction machine based on the output information from the communication device, the communication device is unique identification information allocated to be distinguished from other communication devices stores the, the theft prevention device inputs the unique identification information from the communication device, the second arithmetic processing function of performing arithmetic processing based on the identification information of this It has to.

  According to the anti-theft device and anti-theft system for construction equipment of the present invention, it is possible to determine the removal of the SIM card inserted in the communication device of the construction equipment and prevent the construction equipment from being stolen.

It is a figure which shows the system configuration | structure of this embodiment. It is a figure which shows the internal structure of the communication apparatus 5 and the antitheft apparatus 6. FIG. FIG. 2 is a diagram showing the configuration of an engine system 71, a hydraulic system 72, and an operation pilot system 73 of the hydraulic excavator 1. It is a flowchart which shows the arithmetic processing of the control part 62 of the antitheft device 6.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment is an example applied to a hydraulic excavator which is a typical construction machine. It is not limited to hydraulic excavators.

~Constitution~
FIG. 1 is a diagram showing a system configuration of the present embodiment.

  The anti-theft system of the present embodiment includes a management server 2 installed at a base station away from the excavator 1, a communication network 3, a GPS device 4, a communication device 5, and an anti-theft device 6 mounted on the excavator 1. And a vehicle body controller 7 for controlling the operation of the excavator 1.

  The theft prevention system of the present embodiment prevents theft by combining the following two measures.

  As a first countermeasure, it is confirmed that the excavator 1 is within the set movement area based on position information from the satellite system 8 received by the GPS device 4. When the excavator 1 is stolen and taken out of the set movement area, the excavator 1 is locked by remote control. Since the first countermeasure is described in detail in the prior art, the details are omitted.

  The first countermeasure alone cannot cope with misuse in the setting area. Therefore, in the second countermeasure, the antitheft system performs the operation lock and the operation lock release of the excavator 1 by remote operation via the communication network 3. The command information from the management server 2 is transmitted to the antitheft device 6 via the communication network 3 and the communication device 5 and output to the vehicle body controller 7.

  FIG. 2 is a diagram showing the internal configuration of the communication device 5 and the anti-theft device 6.

  The communication device 5 includes an antenna 51, a communication module 52, a control unit 53, a communication unit 54, and a SIM card 55. The antenna 51 is connected to the communication module 52. The communication module 52 performs transmission / reception with the management server 2 via the communication network 3. The control unit 53 controls the communication module 52. Further, the control unit 53 stores information such as a destination telephone number and a connection destination IP address. The communication unit 54 is a communication port with an external device (for example, the antitheft device 6).

  The communication device 5 transmits vehicle body information (for example, failure diagnosis information) in the vehicle body controller 7 to the management server 2 in addition to receiving the command information from the management server 2.

  The communication device 5 is assigned a unique identification number to be distinguished from other communication devices, and the identification number is stored in the SIM card 55. The SIM card 55 is detachably installed in the communication device 5. The communication device 5 recognizes the telephone number or IP address of the management server 2 and the identification number, thereby enabling transmission / reception with the management server 2.

  The antitheft device 6 includes a communication unit 61, a control unit 62, a command output unit 63, an input unit 64, and a storage unit 65. The communication unit 61 is a communication port with the communication device 5 and is connected to the communication unit 54 of the communication device by wire or infrared rays. The control unit 62 inputs information from the communication unit 61 or the input unit 64, performs a predetermined calculation, and outputs the calculation result to the command output unit 63. The command output unit 63 is a connection port with the vehicle body controller 7. The input unit 64 is a connection port with an external device (for example, the outside air temperature sensor 31 or the numeric keypad input device 32).

  In FIG. 2, the functional block of the control part 62 of the antitheft device 6 is added. The control unit 62 includes a first arithmetic processing function 66 that is common to the prior art and a second arithmetic processing function 67 that is a characteristic configuration of the present embodiment, and further includes a low-temperature processing function 68 and a collation processing function 69. Have.

  The first arithmetic processing function 66 inputs command information (lock command / unlock command) from the management server 2 via the communication network 3, the communication device 5, and the communication unit 61, and receives command information (lock command / unlock command). ) To the vehicle body controller 7 via the command output unit 63.

  When the second arithmetic processing function 67 inputs the identification number of the SIM card 55 in the communication device 5 via the communication unit 61 and determines that the identification number cannot be recognized, the second arithmetic processing function 67 locks to the vehicle body controller 7 via the command output unit 63. Outputs a command.

  The low temperature processing function 68 inputs the outside air temperature information from the outside air temperature sensor 31 via the input unit 64, and activates the collation processing function 69 when the input outside air temperature is less than a threshold value (for example, −20 ° C.).

  The verification processing function 69 inputs an input password from the numeric keypad input device 32 via the input unit 64, compares this input password with the stored password stored in the storage unit 65, and if the password verification matches, A lock release command is output to the vehicle body controller 7 via the output unit 63.

  FIG. 3 is a diagram showing the configuration of the engine system 71, the hydraulic system 72, and the operation pilot system 73 of the hydraulic excavator 1. The excavator 1 further has an electric system 74 (not shown).

  The excavator 1 rotates a hydraulic pump 15 by an engine 11 and drives a hydraulic actuator 17 such as an arm cylinder by pressure oil discharged from the hydraulic pump 15 to perform necessary work such as excavation.

  The engine system 71 includes an engine 11, a fuel injection device 12, and an engine controller 13. The engine controller 13 controls the fuel injection device 12 so that the actual rotational speed of the engine 11 becomes the target rotational speed.

  The hydraulic system 72 includes the hydraulic pump 15, the control valve 16, and the hydraulic actuator 17. The hydraulic pump 15 is driven to rotate by the engine 11 and discharges pressure oil. The control valve 16 controls the direction and flow rate of the pressure oil and supplies the pressure oil to the hydraulic actuator 17. As a result, the hydraulic actuator 17 is driven.

  The operation pilot system 73 includes a pilot pump 18 and an operation device 19. The pilot pump 18 is rotationally driven by the engine 11 to generate a pilot primary pressure. The operation device 19 generates pilot operation pressures PL1 and PL2 based on the operation direction and the operation amount. The pilot operating pressures PL1 and PL2 are applied to the control valve 16, whereby the control valve 16 is switched.

  The vehicle body controller 7 controls the operation of the hydraulic excavator 1, and performs tilt control of the hydraulic pump 15 based on the operation amount of the operation lever 19, for example.

  In the present embodiment, when the vehicle body controller 7 inputs a lock command, at least one of the engine system 71, the hydraulic system 72, the operation pilot system 73, and the electric system 74 is shut off. A plurality may be blocked or all may be blocked. The engine system 71 is shut off by, for example, stopping the fuel supply to the fuel injection device 12. The hydraulic system 72 is shut off by, for example, providing a switching valve on the discharge path of the hydraulic pump 15 and setting the switching valve to the cutoff position. The operation pilot system 73 is shut off by, for example, providing a switching valve on the discharge path of the pilot pump 18 and setting the switching valve to the shut-off position. As a result, the operation of the excavator 1 is disabled (locked).

  On the other hand, when the vehicle body controller 7 inputs a lock release command, the operation lock of the excavator 1 is released and the excavator 1 becomes operable. For example, when the hydraulic system 72 is shut off, the lock is released by setting the switching valve to the communication position.

~control~
FIG. 4 is a flowchart showing the calculation process of the control unit 62 of the antitheft device 6. First, the control unit 62 determines whether or not the input outside air temperature is equal to or higher than a threshold (for example, −20 ° C.) based on the outside air temperature information from the outside air temperature sensor 31 (step S1). If it is determined as above, the identification number of the SIM card 55 is read (step S2). It is determined whether or not the identification number has been recognized (step S3). If it is determined that the identification number has been recognized, the presence or absence of command information from the management server 2 is determined (step S4).

  If there is command information, it is determined whether the command information is a lock command or a lock release command (step S5). If the command information is a lock command, a lock command is sent to the vehicle body controller 7 via the command output unit 63. Output (step S6). If the command information is a lock release command (the command information is not a lock command), a lock release command is output to the vehicle body controller 7 via the command output unit 63 (step S7).

  In step S4, when there is no command information, the processing of steps S2 to S4 is repeated, and command input is waited for.

  As a characteristic process of this embodiment, when it is determined in step S3 that the identification number cannot be recognized, a lock command is output to the vehicle body controller 7 via the command output unit 63 (step S6).

  On the other hand, if it is determined in step S1 that the input outside air temperature is lower than the threshold value, a monitor (not shown) is prompted to input a password (step S11), and the input password input from the numeric keypad input device 32 and the storage unit 65 are stored. The stored password is checked against the stored password (step S12). If the password verification matches, a lock release command is output (step S7). If the password verification does not match, a lock command is output (step S6).

  After the lock command output and lock release command output, the process returns to step 1 at predetermined time intervals and the above processing is repeated.

-Correspondence with claims-
In the above, the first arithmetic processing function 66 of the control unit 62 and the processes of steps S5 and S6 constitute the first arithmetic processing function that inputs command information via the communication unit 61 and performs arithmetic processing based on the command information. In the second calculation processing function 67 and the processes in steps S2 and S3, the identification number of the SIM card 55 in the communication device 5 is input via the communication unit 61, and the second calculation is performed based on the identification number. Configure processing functions.

  The low temperature processing function 68 and the process of step S1 input the outside air temperature information. When the input outside air temperature is less than the threshold value, the verification processing function 69 is activated. When the password verification matches, the command output unit 63 is set. The low-temperature processing function for outputting the unlock command is configured, and the verification processing function 69 of the control unit 62, the processing of steps S11 and S12, the storage unit 65, and the numeric keypad input device 32 are used as password input information. A password verification means for performing verification based on the password is configured.

  Some functions of the vehicle body controller 7 and some configurations of the engine system 71, the hydraulic system 72, the operation pilot system 73, and the electrical system 74 operate the hydraulic excavator 1 based on output information from the antitheft device 6. An operation lock / operation lock release means for releasing the lock / operation lock is configured.

~ Operation ~
The operation of the present embodiment configured as described above will be described.

(1) General operation Before starting work, the excavator 1 is in a locked state in principle. When the administrator of the base station transmits an unlock command, if the outside air temperature is normal and the SIM card 55 is properly inserted, the antitheft device 6 receives the unlock command and the excavator 1 unlocks. (S1->S2->S3->S4->S5-> S7). When the operator turns on the key switch to start the engine 11, the excavator 1 can operate appropriately.

  During the start of work, the excavator 1 is in the unlocked state. When the administrator of the base station transmits a lock command at the end of the work, if the outside air temperature is normal temperature and the SIM card 55 is properly inserted, the anti-theft device 6 receives the lock command, and the excavator 1 Locked (S1-> S2-> S3-> S4-> S5-> S6). Thereby, the theft of the excavator 1 can be prevented.

(2) Operation during theft The hydraulic excavator 1 is in a locked state as a general rule when the work is stopped at night or on holidays. However, it may be unlocked for some reason. Also, it is often unlocked during small breaks such as lunch breaks.

  In such a situation, the theft attempts to remove the SIM card 55 in order to invalidate the remote operation of the administrator. If the identification number stored in the SIM card 55 is not recognized, the management server 2 and the communication device 5 cannot transmit and receive. Even if the administrator notices a change in the excavator and sends a lock command, the excavator 1 is not locked. Thus, in the antitheft system according to the prior art, there is a problem that the theft cannot cope with the act of extracting the SIM card 55.

  In this embodiment, if the antitheft device 6 cannot recognize the identification number, it outputs a lock command and the excavator 1 is locked (S1 → S2 → S3 → S6). Thereby, the theft of the excavator 1 can be prevented.

  After the theft person pulls out the SIM card 55, when the key switch is turned on to start the hydraulic excavator 1, the anti-theft device 6 performs the above operation. Further, the anti-theft device 6 repeats the process shown in the flowchart of FIG. 6, and the anti-theft device 6 performs the above operation when the theft person pulls out the SIM card 55 even after the excavator is started.

(3) Operation at low temperature The hydraulic excavator 1 may be used in a cold region. The communication module 52 of the communication device 5 may not operate at low temperatures. If the low temperature processing function 68 is not provided, even if the SIM card 55 is properly inserted, the antitheft device 6 determines that the identification number cannot be recognized and outputs a lock command (S2 → S3 → S6). . If the identification number is not recognized, the management server 2 and the communication device 5 cannot transmit and receive, and the excavator 1 is not unlocked even if the administrator transmits a lock release command. That is, even if the operator is properly using the hydraulic excavator 1, the hydraulic excavator 1 may be locked and cannot be started.

  In the present embodiment, if the outside air temperature is less than a threshold value (for example, −20 ° C.), when the operator turns on the key switch to start the excavator 1, a message prompting the user to input a password is displayed. If the operator inputs an appropriate password, the antitheft device 6 outputs a lock release command (S1 → S11 → S12 → S7). As a result, the excavator 1 is unlocked and can be started.

  On the other hand, the theft cannot input an appropriate password, and the antitheft device 6 outputs a lock command (S1 → S11 → S12 → S6). When the excavator 1 is originally in a locked state, the locked state is maintained. Thereby, the theft of the excavator 1 can be prevented.

~effect~
The first effect of this embodiment will be described. In the prior art, there has been a problem that the theft cannot cope with the act of extracting the SIM card 55. In this embodiment, when the thief pulls out the SIM card 55, the antitheft device 6 determines that the identification number cannot be recognized and outputs a lock command, so the excavator 1 is locked. Thereby, the theft of the excavator 1 can be prevented.

  The second effect of this embodiment will be described. Further, at the low temperature, there is a possibility that the anti-theft device 6 erroneously determines that the identification number cannot be recognized. In the present embodiment, the anti-theft device 6 outputs a lock release command by password verification at low temperatures, so that the excavator 1 is unlocked and operable.

-Another embodiment-
Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made within the spirit of the present invention. The modifications are listed below.

  1. In the above embodiment, the second arithmetic processing function 67 determines whether or not the identification number has been recognized (step 3). That is, a calculation process based on the presence / absence of an identification number is performed. However, if the thief removes the original SIM card 55 and inserts another SIM card 56, the second arithmetic processing function 67 determines that the identification number can be recognized based on the identification number of the other SIM card 56. To do. On the other hand, the identification number stored in the original SIM card 55 is not recognized, and the management server 2 and the communication device 5 cannot transmit and receive. Even if the administrator notices a change in the excavator and sends a lock command, the excavator 1 is not locked.

  Thus, in a modification, identification numbers may be collated. The storage unit 65 stores information (second identification number) corresponding to the identification number of the SIM card 55. The second arithmetic processing function 67 inputs the identification number (first identification number) of the SIM card 55 in the communication device 5 via the communication unit 61, collates the first identification number with the second identification number, If it is determined that the identification number verification does not match, a lock command is output to the vehicle body controller 7 via the command output unit 63.

  With such a configuration, when the thief removes the original SIM card 55 and inserts another SIM card 56, the second arithmetic processing function 67 determines that the identification number verification does not match, and the excavator 1 Locked. Thereby, the theft of the excavator 1 can be prevented.

  2. In the above embodiment, the low temperature processing function 68 inputs the outside air temperature information from the outside air temperature sensor 31 via the input unit 64, and when this input outside air temperature is less than a threshold value (for example, −20 ° C.), the matching processing function 69 is activated. The verification processing function 69 performs processing based on an appropriate password input by the operator. By the way, the anti-theft system of the present embodiment, in principle, eliminates the need for password input from the viewpoint of reducing the troublesomeness of password management, and the operator may not remember the password. The operator cannot input an appropriate password, and the antitheft device 6 outputs a lock command (S1 → S11 → S12 → S6). That is, the excavator 1 is locked and cannot be started.

  Therefore, in a modified example, the processing (steps S11 and S12) of the matching processing function 69 may be deleted. The low temperature processing function 68 inputs the outside air temperature information from the outside air temperature sensor 31 via the input unit 64, and when this input outside air temperature is less than a threshold (for example, −20 ° C.), the vehicle body via the command output unit 63. An unlock command is output to the controller 7 (S1 → S7).

  With this configuration, the excavator 1 can be started without an operator entering a password. Note that an electronic key storing verification information may be used as a theft prevention measure that replaces password verification.

  3. In the above embodiment, the antitheft device 6 has an independent configuration, but may be a part of the function of the vehicle body controller 7. That is, the control unit 62 becomes a theft prevention function of the vehicle body controller 7. As a result, the command output unit 63 that is a connection port with the vehicle body controller 7 is not necessary, and the communication unit 61, the input unit 64, and the storage unit 65 can be shared with the vehicle body controller 7 and have a simple configuration. it can.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Management server 3 Communication network 4 GPS apparatus 5 Communication apparatus 6 Theft prevention apparatus 7 Car body controller 8 Satellite system 11 Engine 12 Fuel injection apparatus 13 Engine controller 15 Hydraulic pump 16 Control valve 18 Pilot pump 19 Operation apparatus 31 Outside temperature sensor 32 Numeric keypad input device 51 Antenna 52 Communication module 53 Control unit 54 Communication unit 55 SIM card 61 Communication unit 62 Control unit 63 Command output unit 64 Input unit 65 Storage unit 66 First calculation processing function 67 Second calculation processing function 68 Low temperature processing Function 69 Verification processing function 71 Engine system 72 Hydraulic system 73 Operation pilot system 74 Electric system

Claims (6)

A communication unit that performs input / output with an external communication device, a control unit that inputs command information via the communication unit, and has a first calculation processing function that performs calculation processing based on the command information, and the calculation result In the anti-theft device for construction machines with a command output unit that outputs,
The communication device stores unique identification information allocated to be distinguished from other communication devices,
The control unit further has a second calculation processing function for inputting the unique identification information from the communication device via the communication unit and performing calculation processing based on the identification information. Prevention device. In the construction machine antitheft device according to claim 1,
The second arithmetic processing function performs arithmetic processing based on the presence or absence of identification information. The construction machine antitheft device. In the construction machine antitheft device according to claim 1,
Furthermore, a storage unit for storing the second identification number is provided,
The second arithmetic processing function collates the first identification number of the communication device with the second identification number input from the storage unit. In the construction machine antitheft device according to claim 1,
In addition, it has an input unit for input from external devices,
The control unit further has a low-temperature processing function for inputting outside air temperature information via the input unit and outputting a lock release command via the command output unit when the input outside air temperature is less than a threshold value. An anti-theft device for construction machinery, characterized in that. In the construction machine antitheft device according to claim 4,
Furthermore, it has a password verification means that performs verification based on password input information,
The low temperature processing function is characterized in that when the input outside air temperature is less than a threshold value, the password verification unit is operated, and when the password verification is matched, an unlock command is output via the command output unit. Anti-theft device for construction machinery. A construction machine anti-theft system that commands operation lock and unlock operation of a construction machine by remote control,
A management server installed at a base station away from the construction machine and transmitting command information;
A communication device mounted on a construction machine and receiving command information;
An antitheft device having a first arithmetic processing function for performing arithmetic processing based on the command information;
Based on the output information from this antitheft device, equipped with operation lock / operation lock release means for operation lock / operation lock release of the construction machine,
The communication device stores unique identification information allocated to be distinguished from other communication devices,
The theft prevention device of construction machinery theft prevention system, characterized in that the input from the communication device the unique identification information, further comprising a second arithmetic processing function of performing arithmetic processing based on the identification information of this.

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