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US 7,030,754 B2Granted
Alarm system
AssigneeOptex Co., Ltd.
InventorMasashi Iwasawa
Life of this patent
Estimating the term…
Abstract
A transmitter comprises a signaling history information transmission unit. After the transmitter generates a detection signal, the signaling history information transmission unit sends corresponding signaling history information to a regular signal transmission unit. From this regular signal transmission unit, the signaling history information and a regular signal are transmitted to a receiver. The signaling history information contains a count value which is updated at every transmission of the information. Even if the transmitter generates a detection signal during a communication failure, the receiver can identify a time when the transmitter generated the detection signal, based on a received count value.
Claims11
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes a first transmission unit for
- (i) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal by producing signaling historical information that relates to how many times the signaling historical information has been transmitted to said receiving system, and
- (ii) allowing the signaling historical information to be transmitted to said receiving system.
3 more elements
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes
- (i) a first transmission unit for
- (a) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal, and
- (b) allowing the signaling historical information to be transmitted to said receiving system, and
- (ii) a second transmission unit for
- (a) transmitting a regular signal to said receiving system at a first predetermined time interval,
- (b) receiving the signaling historical information from said first transmission unit, and
- (c) transmitting the signaling historical information to said receiving system.
8 more elements
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes a first transmission unit for
- (i) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal by producing signaling historical information that relates to all detection signals previously generated by said transmission system;
- (ii) allowing the signaling historical information to be transmitted to said receiving system;
- and
- (iii) allowing transmission of the signaling historical information to said receiving system to be terminated after the signaling historical information has been transmitted to said receiving system a predetermined number of times.
5 more elements
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes a first transmission unit for
- (i) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal by producing signaling historical information that relates to the oldest detection signal from among detection signals previously generated by said transmission system;
- (ii) allowing the signaling historical information to be transmitted to said receiving system;
- and
- (iii) allowing transmission of the signaling historical information to said receiving system to be terminated after the signaling historical information has been transmitted to said receiving system a predetermined number of times.
5 more elements
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes a first transmission unit for
- (i) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal by producing signaling historical information that relates to all detection signals previously generated by said transmission system;
- (ii) allowing the signaling historical information to be transmitted to said receiving system;
- and
- (iii) allowing transmission of the signaling historical information to said receiving system to be terminated after the signaling historical information has been transmitted to said receiving system for a predetermined period of time.
5 more elements
An alarm system comprising:
- a transmission system for generating a detection signal upon detection of an object within a monitoring area;
- and
- a receiving system for generating an alarm signal upon receiving the detection signal from said transmission system,
- wherein said transmission system includes a first transmission unit for
- (i) producing at a predetermined time interval, after said transmission system generates a detection signal upon detection of an object in the monitoring area, signaling historical information that relates to the detection signal by producing signaling historical information that relates to the oldest detection signal from among detection signals previously generated by said transmission system;
- (ii) allowing the signaling historical information to be transmitted to said receiving system;
- and
- (iii) allowing transmission of the signaling historical information to said receiving system to be terminated after the signaling historical information has been transmitted to said receiving system for a predetermined period time.
5 more elements
Dependencies are inferred from the claim text.