Key hole insertion for manhole and manhole cover locking apparatus equipped with the key hole insertion and manhole cover locking system and unlocking method and manhole cover opening and closing control system

A locking system for a manhole cover in which a key hole insertion has a locking cap detachably attached and capable of locking to a key hole in a cover body of the manhole cover can reject an access of a cover-opening handle key to the key hole from outside, the locking system comprising:

• a personal identification tag having a personal authentication code of a person or group who is authorized to unlock the manhole cover;
• a non-contact reading and writing terminal used for sending an unlock signal after recognizing the personal authentication code in the personal identification tag and effecting authentication and identification of the person or group who is authorized to unlock the manhole cover;
• a control chip mounted in the locking cap for receiving the unlock signal from the non-contact reading and writing terminal to permit unlock of the locking cap to the key hole;
• and
• a locking unit mounted in the locking cap for unlocking the lock of the locking cap from the key hole upon receiving a control signal sent from the control chip.

An unlocking method for a manhole cover locking system in which the key hole insertion has a locking cap detachably_attached and capable of locking to a key hole in a cover body of the manhole cover can reject an access of a cover-opening handle key to the key hole from outside,

• wherein the manhole cover locking system comprises, a personal identification tag having a personal authentication code of a person or group who is authorized to unlock the manhole cover;
• a non-contact reading and writing terminal used for sending an unlock signal after recognizing the personal authentication code in the personal identification tag and effecting authentication and identification of the person or group who is authorized to unlock the manhole cover;
• a control chip mounted in the locking cap for receiving the unlock signal from the non-contact reading and writing terminal to permit unlocking of the locking cap to the key hole;
• and a locking unit mounted in the locking cap for unlocking the lock of the locking cap from the key hole upon receiving a control signal sent from the control chip,
• wherein, at the process where the non-contact reading and writing terminal effects the authentication and identification after recognizing the personal identification tag, the non-contact reading and writing terminal transmits the unlock signal to the control chip that in turn sends a control signal by which the locking unit unlocks the locking cap with respect to the key hole.

A manhole cover opening and closing control system in which a key hole insertion has a locking cap detachably attached and capable of locking to a key hole in a cover body and capable of rejecting an access of a cover-opening handle key to the key hole from outside, the system comprising:

• a non-contact or contact reading telecommunications terminal which recognizes a personal authentication code of a person or group who is authorized to unlock the manhole cover, and also recognizes a placement code for manhole cover stored in a memory of a control chip mounted in the key hole insertion;
• and
• a central controlling apparatus admitting the opening of the manhole cover upon receiving a personal authentication code and the placement code transmitted from the non-contact or contact reading telecommunication terminal;
• and
• wherein the non-contact or contact reading telecommunications terminal, upon receiving an unlock permitting signal sent from the central controlling apparatus, transmits an unlock signal to the control chip, which in turn sends a control signal to the locking unit in the key hole insertion for controlling the locking unit to unlock the key hole insertion with respect to the key hole.