摘要:
Disclosed is a method for detecting the condition of a crack generated in a rotor of a rotary machine during an operation thereof to check whether the crack is developing or not. The number of revolutions of the rotor and oscillations of journal end portions of the rotor born by the bearings are continually detected. The detection of the crack condition is made on the basis of the detected signal corresponding to the waveform of each half of at least one cycle of the detected rotor oscillation. Disclosed also is an apparatus for carrying out the method.
摘要:
A vibration diagnosis method and apparatus for rotary machines adapted for measuring the vibration of rotor shaft of a rotary machine, extracting the vibration component synchronous with the revolution of the rotor shaft from the measured vibration data, comparing the amplitude of the extracted vibration component with the amplitude of the overall vibration, analyzing the causes of the synchronous vibration component when the result of the comparison meets a predetermined reference, judging, in accordance with the result of the analysis, whether the vibration due to mass unbalance is attributable to an abrupt generation of mass unbalance or to a thermal bow of the rotor shaft, and displaying the result of the judgment. The analysis of the vibration component is made in real time or making use of data stored in the past.
摘要:
A battery history information management device for managing history information of a secondary battery includes: a connection determination unit which determines whether a charge/discharge device connected to the secondary battery is (i) a first charge/discharge device connected via a communication network to a server which manages the history information or (ii) a second charge/discharge device not connected to the server; a battery history recording unit which records, when it is determined that the charge/discharge device is the second charge/discharge device, charge/discharge history for second charge/discharge device into battery history data; and a history upload control unit which transmits, when it is determined that the charge/discharge device is the first charge/discharge device, the battery history data to the server via the first charge/discharge device.
摘要:
A storage unit 601g of a recording medium device 600g stores a content and a revocation list. The revocation list includes a revocation identifier that is associated with the content and identifies a revoked public key certificate allocated to an apparatus related to use of the content. A controller 602g of the recording medium device 600g is provided with an acquisition unit 621g that acquires, from an apparatus 300g, an acquisition request for the content and an apparatus identifier identifying a public key certificate of the apparatus 300g; a judgment unit 622g that judges whether the apparatus identifier matches a revocation identifier; and a control unit 623g that controls to prohibit output of the content to the apparatus when the apparatus identifier and the revocation identifier match.
摘要:
To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unit 102 extracts a content name from playback control information in a playback path information table 210, and inquires of a rights management unit 108 whether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unit 102 extracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unit 102 then instructs a decryption unit 103 and a playback unit 107 to decrypt and play back encrypted content identified by the extracted content name.
摘要:
To provide a playback device that plays back a content recorded in an optical disc in conjunction with execution of an application supplied by a server. The playback device includes a disc region code detection unit operable to detect a region code from the optical disc; an application region code estimation unit operable to estimate a region code assigned to the application based on an address of the server; a restriction unit operable, if a region code assigned to the playback device, the region code detected from the optical disc, and the estimated region code assigned to the application do not match each other, to restrict the playback of the content in conjunction with the execution of the application.
摘要:
A design information providing system, which does not allow continuation of manufacturing of products unless a patent license contract is concluded, includes a terminal apparatus (40a) of a user manufacturing a product (BD player (50)) and includes a patent license issuing server (20a) issuing, to the terminal apparatus (40a), a contract certificate (60) certifying the conclusion of the contract, when a contract for a license necessary for manufacturing the BD player (50) is concluded with the user of the terminal apparatus (40a). Further, the design information providing system includes a design information providing server (an encryption key issuing server (30a)) transmitting an encryption key (80) to the terminal apparatus (40a) on condition of the confirmation of the contract certificate (60), when a request for design information (encryption key (80)) unique to the BD player (50) is transmitted from the terminal apparatus (40a).
摘要:
A content protection system prevents illegal key acquisition, without checking uniqueness of device keys. The content protection system includes a key data generation apparatus and a user terminal. The key data generation apparatus converts first key data, which is for using content, based on a predetermined conversion rule, thereby generating second key data, encrypts the second key data using a device key held by valid terminals, and outputs the encrypted key data. The user terminal obtains the encrypted key data, decrypts the encrypted key data using a device key held by the user terminal, thereby generating second key data, converts the second key data based on a re-conversion rule corresponding to the conversion rule, thereby generating the first key data, and uses the content with use of the generated first key data.
摘要:
A recording and reproduction apparatus for preventing illegitimate use of contents. A recording medium stores an inherent number in an unrewritable area. The recording apparatus writes media key data and an encrypted content onto the recording medium. The media key data includes encrypted media keys generated by (i) for each of unrevoked reproduction apparatuses, encrypting a media key using a device key of the unrevoked reproduction apparatus respectively, and (ii) for each of revoked reproduction apparatuses, encrypting detection information using a device key of the revoked reproduction apparatus. The reproduction apparatus decrypts the encrypted media key using a device key to generate a decryption media key, judges whether the decryption media key is the detection information, and prohibits the encrypted content recorded on the recording medium from being decrypted when judged in the affirmative.
摘要:
A content of Copy Once cannot be copied to an external device or the like, even for the purpose of making a backup. This is inconvenient for the user. However, if copying to another device for the purpose of making a backup is permitted, the content may be copied in an unauthorized manner. The present invention provides the hard disk recorder that transmits the content to the backup device, sets an expiration time in the content stored in the hard disk recorder itself, and deletes the content stored in the hard disk recorder itself after the expiration time expires.