JP4439954B2 - Industrial machine anti-theft system, anti-theft device - Google Patents

Description

  The present invention relates to anti-theft technology for industrial machines such as hydraulic excavators and lift trucks.

  An anti-theft device is known that prevents theft of construction machines by requiring code input when starting the engine of the construction machine and allowing the engine of the construction machine to start when the input code matches a preset password. (For example, Patent Document 1).

Japanese Patent Laid-Open No. 9-48324

  In the anti-theft device that requires code input as disclosed in Patent Document 1, it is necessary to input the code every time the engine is started. Therefore, the operator of the construction machine must always remember the correct password. . Since this is a heavy burden on the operator, there is a case where the personal identification code is recorded near the driver's seat for the purpose of not forgetting the personal identification code. In this case, since the thief can easily know the password, there is a problem that the anti-theft device cannot play its role.

The industrial machine anti-theft system according to claim 1 comprises an anti-theft device mounted on an industrial machine and a portable terminal carried by an operator of the industrial machine. A wireless communication means for receiving security information wirelessly transmitted from the outside, including a preset first personal identification number and information indicating the rental period of the industrial machine, and a security for storing the security information received by the wireless communication means An anti-theft device for receiving the security information transmitted by the security information transmitting means, the security information transmitting means for transmitting the security information stored in the security information storing means to the outside; Means, a password storage means for storing a preset second password, and a current time A time measuring means for measuring the time, a first personal identification number included in the security information received by the security information receiving means, and a second personal identification number stored in the personal identification number storage means, and a time measuring means When it is determined whether the current time measured by is within the rental period, and based on the verification result and the determination result, the operation of the industrial machine is determined to match the verification and within the rental period Permits a judgment control means that prohibits at least one of when the verification does not match and when it is determined that it is not within the rental period, and notifies the portable terminal that the operation of the industrial machine is prohibited by the judgment control means The portable terminal has a prohibition notification unit, and the mobile terminal receives a determination result by the determination control unit and a notification by the prohibition notification unit. , In which further comprising an erasing means for erasing the security information stored in the security information storage means.
According to a second aspect of the present invention, in the industrial machine antitheft system of the first aspect, the mobile terminal is a mobile phone, the security information is transmitted using an e-mail function of the mobile phone, and the wireless communication means Security information transmitted using the e-mail function of the mobile phone is received.
The invention of claim 3 is the industrial machine anti-theft system of claim 1 or 2, wherein the security information is encrypted so that the contents cannot be deciphered, and the anti-theft device stores the encrypted security information. It further has a first descrambling means for decrypting the encryption.
According to a fourth aspect of the present invention, in the industrial machine antitheft system according to the first or second aspect, the security information is encrypted so that the contents cannot be deciphered, and the portable terminal encrypts the encrypted security information. And a second descrambling unit for canceling the encryption, and the security information decrypted by the second descrambling unit is transmitted to the anti-theft device by the security information transmitting unit.
The anti-theft device according to the invention of claim 5 is used in the anti-theft system of the industrial machine according to any one of claims 1 to 4, and includes a security information receiving means, a password storing means, a time measuring means, and a judgment control means. When, in which and a prohibition notification means.

  According to the present invention, the security information wirelessly transmitted to the mobile terminal is transmitted from the mobile terminal to the anti-theft device. In the anti-theft device, the first personal identification number included in the security information transmitted from the mobile terminal, It collates with the set second personal identification number, and based on the collation result, the operation of the construction machine is permitted or prohibited. Since it did in this way, it is not necessary for an operator to make a note so as not to forget the password, and therefore the password is not easily known to the thief.

-First embodiment-
FIG. 1 shows a construction machine antitheft system according to an embodiment of the present invention. The construction machine 1 includes an anti-theft device 2 as shown by the shaded portion in the figure. The anti-theft device 2 is installed, for example, in the vicinity of the driver's seat of the construction machine 1 and permits the operation of the construction machine 1 based on transmission information from the mobile phone 3 carried by the operator of the construction machine 1. It is forbidden. The mobile phone 3 is connected to the mobile phone 5 connected to the personal computer 4 via the mobile phone base station 6.

  The personal computer 4 is provided in a management office of a rental company that is the owner of the construction machine 1, and the following information is recorded on the construction machine 1. The first is an equipment code for identifying an individual construction machine. The device code is represented by, for example, a model number and a machine number (manufacturing number), and a different device code is preset for each individual construction machine. The second is information relating to the rental period, and represents the rental start date and the rental end date when the construction machine is being rented. The rental company inputs this rental period information when lending a construction machine to a customer. The third is a code number for permitting the construction machine 1 to operate. The rental company can arbitrarily set the password, but it is necessary to record the same password on the construction machine in advance.

  The three pieces of information described above recorded in the personal computer 4 are collectively referred to as security information. When the rental company owns a plurality of construction machines in addition to the construction machine 1, security information of each individual is recorded in the personal computer 4. The contents of this security information can be displayed on the screen of the personal computer 4. FIG. 2 is a screen example in which security information of three construction machines is displayed on the personal computer 4. The contents of the security information of the personal computer 4 can be changed as appropriate.

  The security information is output as an electronic file to the mobile phone 5 connected to the personal computer 4 by operating the personal computer 4 of the rental company. From there, the electronic file is transmitted to the mobile phone 3 carried by the operator via the mobile phone base station 6. Hereinafter, this electronic file is referred to as a security information file. The security information file is transmitted only for the individual construction machine selected by the rental company in the personal computer 4. In the following description, it is assumed that the security information file of the construction machine 1 is transmitted to the mobile phone 3. Note that security information on a plurality of construction machines may be included in one security information file.

  In the transmission of the security information file, transmission is performed from the rental company's mobile phone 5 to the operator's mobile phone 3 using the e-mail function of the mobile phone. The security information file is encrypted so that the contents of the security information represented therein cannot be decrypted by an operator or a third party. This encryption is performed when a security information file is created in the personal computer 4.

  The security information file transmitted to the mobile phone 3 is temporarily stored in the mobile phone 3 and is then transmitted to the anti-theft device 2 by the operator's operation. When receiving the security information file from the mobile phone 3, the anti-theft device 2 performs a decryption process for decrypting the security information, and then performs the operation of the construction machine 1 based on the contents of the security information. Determine whether or not to allow.

  FIG. 3 shows a block diagram of the anti-theft device 2 and the mobile phone 3. The mobile phone 3 includes an infrared communication unit 31, a transmission / reception unit 32, an operation button 33, a memory 34, and a control unit 35. Here, the infrared communication unit 31 is a communication port used when performing infrared communication with the outside, and the transmission / reception unit 32 is a part that performs wireless transmission / reception for connecting to the mobile phone 5 via the mobile phone base station 6. is there. Mobile phones having such a configuration are commercially available. The security information file transmitted from the mobile phone 5 is received by the transmission / reception unit 32 in the mobile phone 3. The received security information file is output from the transmission / reception unit 32 to the control unit 35, and from there, is output to the memory 34 and stored.

  When operating the construction machine 1, the operator of the construction machine 1 outputs an engine start request signal by turning on the key switch 7 provided on the vehicle body, and then stored in the memory 34 by operating the operation button 33. Select the required security information file from the various files. And the infrared radiation part in the infrared communication part 31 is turned to the light-receiving part in the infrared communication part 21 of the antitheft device 2. As a result, the security information file is transmitted to the anti-theft device 2. When the key switch 7 is turned on, it is preferable to request the operator to transmit the security information file by using various displays and sounds.

  The anti-theft device 2 includes an infrared communication unit 21, a device code storage unit 22, a personal identification number storage unit 23, a time measurement unit 24, a determination processing unit 25, and a release signal output unit 26. The security information file transmitted as described above from the infrared communication unit 31 of the mobile phone 3 is received by the infrared communication unit 21 of the antitheft device 2 and is output from there to the determination processing unit 25.

  When the engine start request signal from the key switch 7 is input, the determination processing unit 25 decrypts the security information file received by the infrared communication unit 21 and releases the encryption. As a result, the contents of the security information can be read. Thereafter, it is determined whether or not the security information is correct by using the device code storage unit 22, the personal identification number storage unit 23, and the time measurement unit 24. The device code storage unit 22 and the personal identification number storage unit 23 store the device code and personal identification number of the construction machine 1, respectively, and the contents are the same as those recorded in the personal computer 4 described above. The time measuring unit 24 measures the date and time as the current time. The determination processing unit 25 determines whether the security information is correct by collating the contents of the security information using these. The processing contents of the determination processing unit 25 will be described in detail later with reference to FIG.

  If the security information is correct as a result of the determination, the operation of the construction machine 1 is permitted, and the determination processing unit 25 requests the release signal output unit 26 to output the release signal to the relay 8. Thereby, a relay release signal is output from the release signal output unit 26 to the relay 8 installed on the vehicle body of the construction machine 1. When the relay release signal is output from the release signal output unit 26 and the engine start request signal is output from the key switch 7, the relay 8 outputs the power output of the battery 9 to the engine starter 10a. As a result, the engine starter 10a operates and the engine 10 of the construction machine 1 starts. In this way, the operation of the construction machine is permitted. On the other hand, if the security information is not correct as a result of the determination, the operation of the construction machine 1 is prohibited. In this case, the output request of the relay release signal from the determination processing unit 25 to the release signal output unit 26 is not performed, so the engine 10 does not start.

  In the operation of the construction machine, for example, in the excavator 100 shown in FIG. An operation, a turning operation performed in the turning body 106, and the like are applicable.

  The content of the processing executed in the determination processing unit 25 of the antitheft device 2 is shown in the flowchart of FIG. This flowchart is executed when an engine start request signal from the key switch 7 is input. In step S1, it is determined whether or not the security information file transmitted from the mobile phone 3 has been received. If received, the process proceeds to the next step S2. If not received, the process stays at step S1 until received.

  As described above, the security information file transmitted from the mobile phone 3 is received by the infrared communication unit 21, and is output from there to the determination processing unit 25. Therefore, in step S1, it is determined whether or not the security information file has been received by determining whether or not the security information file has been output from the infrared communication unit 21 to the determination processing unit 25. In step S2, the encryption is released by decrypting the security information file received in step S1. As a result, the contents of the security information can be deciphered.

  In step S3, the device code of the construction machine 1 stored in the device code storage unit 22 is read, and the device code in the received security information is collated with the read device code. As a result of the collation, if both device codes match, the process proceeds to step S4. On the other hand, if they do not match, the processing flow of FIG. 4 ends. In this case, since no output request for the relay release signal is made to the release signal output unit 26, the start of the engine 10 is prohibited, and as a result, the operation of the construction machine 1 is prohibited.

  In step S4, the current date and time measured by the time measuring unit 24 are read, and the rental start date and rental end date in the received security information are compared with the read current date and time. As a result of the collation, if the current date and time are within the rental period, the process proceeds to step S5. If it is not within the rental period, the processing flow of FIG. 4 is terminated. Also in this case, no output request for the relay release signal is issued to the release signal output unit 26, and the operation of the construction machine 1 is prohibited.

  In step S5, the personal identification number recorded in the personal identification number storage unit 23 is read, and the personal identification number in the received security information is collated with the read personal identification number. As a result of the collation, if the two passwords match, the process proceeds to step S6. However, if they do not match, the processing flow of FIG. 4 ends. Also in this case, the output of the relay release signal is not requested to the release signal output unit 26, and the operation of the construction machine 1 is prohibited.

  In step S6, the release signal output unit 26 is requested to output a release signal to the relay 8. Thereby, the engine 10 of the construction machine 1 is started as described above, and the operation of the construction machine 1 is permitted. If step S6 is performed, the processing flow of FIG. 4 will be complete | finished.

According to the first embodiment described above, the following operational effects can be obtained.
(1) Transmit security information including a preset password to the construction machine 1 from the personal computer 4 to the mobile phone 3. The mobile phone 3 stores the transmitted security information in the memory 34 and transmits it to the anti-theft device 2 according to the operation of the operator. The anti-theft device 2 compares the security code in the security information transmitted from the mobile phone 3 with the security code stored in the security code storage unit 23 in advance, and permits the operation of the construction machine 1 based on the verification result. Or decided to ban. Since it did in this way, it is not necessary for an operator to make a note so as not to forget the password, and therefore the password is not easily known to the thief.

(2) It is determined whether or not the current time measured by the time measuring unit 24 is within the rental period based on the rental period information included in the security information, and if the rental time is not within the rental period, the operation of the construction machine 1 is prohibited. It was decided to. Since it did in this way, it can prevent that the construction machine which the rental period passed has been used illegally.

(3) Since the security information is transmitted using the e-mail function of the mobile phone, the security information can be easily transmitted to the mobile phone of the operator at a remote place without using a special communication facility. .

(4) Since security information is encrypted and transmitted so that a person other than the rental company cannot decrypt it, forgery or unauthorized tampering of security information can be prevented.

  In the embodiment described above, the rental company can arbitrarily set the password of the construction machine. Therefore, even if a person who has obtained the equipment code of the construction machine owned by this rental company (for example, another rental company) tries to forge the security information file using the same device as the personal computer 4, the personal identification number is not known. Can not forge. This also prevents forgery of the security information file.

-Second Embodiment-
A second embodiment of the antitheft system of the present invention will be described. The system configuration of the present embodiment is the same as that of the first embodiment shown in FIG. 1, and the antitheft device 2 and the mobile phone 3 are represented by the same block diagram as that of the first embodiment shown in FIG. Is done. Therefore, description thereof will be omitted, and the description below will focus on differences from the first embodiment.

  In the first embodiment described above, the security information file is transmitted from the mobile phone 3 to the anti-theft device 2 by the operation of the operator, the security information file encrypted in the anti-theft device 2 is decrypted, and the security information file is decrypted. The engine start of the construction machine 1 was permitted or prohibited depending on the content of the information. On the other hand, in the present embodiment, the security information file is decrypted in the mobile phone 3. Further, by alternately communicating between the mobile phone 3 and the anti-theft device 2, the device code, the rental period, and the personal identification number in the security information are transmitted from the mobile phone 3 to the anti-theft device 2, respectively. Is transmitted from the antitheft device 2 to the mobile phone 3. If any of the security information is incorrect, the engine start of the construction machine 1 is prohibited. Specific processing contents will be described next with reference to flowcharts.

  FIG. 5 shows a flowchart of processes executed in the mobile phone 3 and the antitheft device 2 in the present embodiment. Steps S11 to S23 of FIG. 5 are executed by the control unit 35 of the mobile phone 3, and steps S31 to S45 are executed by the determination processing unit 25 of the antitheft device 2. In order to execute the processes of steps S11 to S23 in the mobile phone 3, a security information file is transmitted from the mobile phone 5 in advance, and the content of the security information is stored in the memory 34 after being decrypted. Yes. However, the security information stored in the memory 34 cannot be taken out and confirmed outside so that a person other than the rental company cannot know the contents of the security information.

  The cellular phone 3 executes the processes of steps S11 to S23 when the operator intends to operate the construction machine 1. Specifically, for example, it may be executed when the operator performs a specific operation using the operation button 33 of the mobile phone 3, or the key switch 7 of the construction machine 1 is turned on and an engine start request is made. The mobile phone 3 may be able to detect that the signal has been output, and may be executed when the detection is made. Note that the application for executing the processes of steps S11 to S23 may be installed in the mobile phone 3 in advance, or may be transmitted together with the security information file. The anti-theft device 2 executes the processes of steps S31 to S45 when the key switch 7 is turned on and an engine start request signal is input.

  In step S <b> 11, the mobile phone 3 transmits a device code request command for requesting a device code to the anti-theft device 2 by the infrared communication unit 31. The device code request command is received by the anti-theft device 2 at step S31, and the device code is transmitted at step S32 accordingly. In addition, each arrow shown with a broken line in FIG. 5 represents transmission from the mobile phone 3 to the anti-theft device 2 or from the anti-theft device 2 to the mobile phone 3 like the above-described device code request command. In step S12, it is determined whether or not the device code transmitted from the antitheft device 2 has been received. If received, the process proceeds to step S13. If not received, the process stays in step S12 until received.

  In step S <b> 13, it is determined whether security information corresponding to the device code received in step S <b> 12 is stored in the memory 34. If it is stored, the process proceeds to step S14. If it is not stored, the process flow of FIG. 5 is terminated. In step S14, the device code received in step S12 is transmitted to the anti-theft device 2. This device code is received by the anti-theft device 2 in step S33. In step S34, it is determined whether or not the device code matches the device code stored in the device code storage unit 22. An OK notification is transmitted in step S35, or an NG notification is transmitted in step S36.

  In step S15, it is determined whether or not a device code determination result notification from the anti-theft device 2 has been received. If received, the process proceeds to the next step S16 to determine whether the content is OK or NG. judge. If it is OK, the process proceeds to step S17. If it is NG, the process flow of FIG. 5 is terminated. In step S <b> 17, the security information rental period stored in the memory 34 is transmitted to the anti-theft device 2. This rental period is received in step S37 in the anti-theft device 2, and in step S38, it is determined whether or not the current date and time measured by the time measuring unit 24 are within the rental period. As a determination result, an OK notification is transmitted in step S39 or an NG notification is transmitted in step S40.

  In step S18, it is determined whether or not a rental period determination result notification from the anti-theft device 2 has been received. If received, the process proceeds to the next step S19 to determine whether the content is OK or NG. judge. If it is OK, the process proceeds to step S20, and if it is NG, the process proceeds to step S23. In step S20, the security code PIN stored in the memory 34 is transmitted to the anti-theft device 2. This security code is received by the anti-theft device 2 in step S41. In step S42, it is determined whether or not it matches the security code stored in the security code storage unit 23. An OK notification is transmitted in step S43, or an NG notification is transmitted in step S44.

  After transmitting the OK notification to the mobile phone 3 in step S43 as described above, the antitheft device 2 requests the release signal output unit 26 to output a release signal to the relay 8 in step S45. Thereby, the engine of the construction machine 1 is started as described above, and the operation of the construction machine 1 is permitted. After executing step S45, the processing flow of FIG. 5 is terminated. On the other hand, when an NG notification is transmitted in step S36, S40, or S44, the processing flow in FIG. 5 is terminated without executing the subsequent processing. In this case, since the relay cancel signal output request is not made to the cancel signal output unit 26, the engine start is prohibited and the operation of the construction machine 1 is not permitted.

  The mobile phone 3 executes step S21 after the above step S20 to determine whether or not a notification of the result of judgment of the personal identification number from the antitheft device 2 has been received. The process proceeds to and it is determined whether the content is OK or NG. If it is OK, the processing flow of FIG. 5 is terminated. In this case, the operation of the construction machine 1 is permitted in the antitheft device 2 and a release signal is output to the relay 8. On the other hand, if it is NG in step S22, the process proceeds to step S23.

  In step S23, the contents of the security information stored in the memory 34 are deleted. In this way, if the rental period has expired or if the password is different, the security information cannot be used thereafter. If security information of a plurality of construction machines is recorded, only the security information of the corresponding construction machine is deleted. After step S23 is executed, the processing flow of FIG. 5 is terminated.

  According to the second embodiment described above, when the operation of the construction machine 1 is prohibited in the antitheft device 2, the notification is transmitted to the mobile phone 3 (steps S40 and S44). When receiving the notification, the mobile phone 3 deletes the security information stored in the memory 34 (step S23). Since it did in this way, in addition to the effect of 1st Embodiment, when trying to operate a construction machine using unauthorized security information, the security information can be made unusable thereafter. .

  In the above embodiment, the example in which the security information is transmitted to the anti-theft device 2 using the mobile phone 3 has been described. However, it may not be a mobile phone as long as the operator is carrying it. For example, a function as described in the above mobile phone 3 may be incorporated in a wristwatch or the like.

  In the above-described embodiment, the example in which the security information is transmitted from the mobile phone 3 to the anti-theft device 2 by infrared communication has been described. However, other wireless communication methods may be used, or wired communication may be used.

  In order to prohibit the operation of the construction machine, the engine start may not be prohibited as described in the above embodiment, and the actuator may not be substantially operated via the hydraulic system. For example, the pressure oil may be cut by a control valve, the pump tilt may be zero, or the relief pressure may be zero.

  In the above embodiment, the mobile terminal is realized by the mobile phone 3, the wireless communication means is the transmission / reception unit 32, the security information storage means is the memory 34, the security information transmission means is the infrared communication unit 31, the erasure means and the second encryption The release means is realized by the control unit 35, respectively. Further, the security information receiving unit and the prohibition notification unit are realized by the infrared communication unit 21, and the determination control unit and the first descrambling unit are realized by the determination processing unit 25. However, what has been described in the above embodiment including these is merely an example, and each component is not limited to the above embodiment as long as the characteristics of the present invention are not impaired.

It is a figure which shows one Embodiment of the antitheft system of the construction machine by this invention. It is a figure which shows the example of a display screen of a personal computer. It is a block diagram of an antitheft device and a mobile phone. 4 is a flowchart of processing executed by the antitheft device in the first embodiment. In 2nd Embodiment, it is a flowchart of the process which a mobile telephone and an antitheft device each perform. It is a figure which shows a hydraulic shovel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Construction machine 2 Antitheft device 3 Mobile phone 4 Personal computer 5 Mobile phone 6 Mobile phone base station 7 Key switch 8 Relay 9 Battery 10 Engine 10a Engine starter 21 Infrared communication part 22 Equipment code memory part 23 PIN code memory part 24 Time measurement part 25 determination processing unit 26 release signal output unit 31 infrared communication unit 32 transmission / reception unit 33 operation button 34 memory 35 control unit

Claims (5)

An anti-theft device mounted on an industrial machine,
A portable terminal carried by an operator of the industrial machine,
The portable terminal is
Wireless communication means for receiving security information wirelessly transmitted from the outside, including information indicating a first password set in advance for the industrial machine and a rental period of the industrial machine;
Security information storage means for storing security information received by the wireless communication means;
Security information transmission means for transmitting the security information stored in the security information storage means to the outside,
The anti-theft device is
Security information receiving means for receiving security information transmitted by the security information transmitting means;
A password storage means for storing a second password set in advance;
A time measuring means for measuring the current time;
The first personal identification number included in the security information received by the security information receiving means is compared with the second personal identification number stored in the personal identification number storage means, and the current time measured by the time measurement means It is determined whether or not the time is within the rental period, and based on the verification result and the determination result, the operation of the industrial machine is permitted when it is determined that the verification matches and is within the rental period. Determination control means for prohibiting in the case of at least one of when the verification does not match and when it is determined that it is not within the rental period;
A prohibition notification means for notifying the portable terminal that the operation of the industrial machine is prohibited by the determination control means;
The portable terminal includes a receiving unit that receives a determination result by the determination control unit;
An anti-theft system for industrial machines, further comprising an erasing unit for erasing the security information stored in the security information storage unit when a notification is given by the prohibition notification unit. The industrial machine anti-theft system according to claim 1,
The mobile terminal is a mobile phone,
The security information is transmitted using the e-mail function of the mobile phone,
The wireless communication means receives security information transmitted using the electronic mail function of the mobile phone, and is an anti-theft system for industrial machines. In the industrial machine antitheft system according to claim 1 or 2,
The security information is encrypted so that its contents cannot be decrypted,
The anti-theft device for industrial machines, further comprising a first descrambling means for decrypting the encrypted security information. In the industrial machine antitheft system according to claim 1 or 2,
The security information is encrypted so that its contents cannot be decrypted,
The portable terminal is
And further comprising a second descrambling means for decrypting the encrypted security information,
An anti-theft system for industrial machines, wherein the security information decrypted by the second decryption means is transmitted to the anti-theft device by the security information transmitting means. It is used in the antitheft system for an industrial machine according to any one of claims 1 to 4, wherein the security information receiving means, the password storing means, the time measuring means, the determination control means, and the prohibition notification means An anti-theft device comprising:

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