Wireless measuring device

• US 7,174,268 B2
• Filed: 08/18/2005
• Issued: 02/06/2007
• Est. Priority Date: 08/18/2004
• Status: Expired due to Fees

• Current Assignee: Takion Company Limited, UBE Industries Limited (UBE Corporation)
• Original Assignee: Takion Company Limited, UBE Industries Limited (UBE Corporation)
• Inventors: Tanaka, Tsutomu, Ohnishi, Akira, Saitoh, Yutaka, Tachikawa, Sumitaka, Katsuki, Shozo
• Primary Examiner(s): Barlow; John
• Assistant Examiner(s): Washburn; Douglas N
• Application Number:
  US11/206,157
• Publication Number:
  US 20060052987A1
• Time in Patent Office: 537 Days
• Field of Search: 702/127, 702/131, 702/130
• US Class Current: 702/131
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A wireless measuring device 1 is provided which includes a plurality of child units 2 and a parent unit 3 to receive data measured by these child units 2 by wireless communication. Each of the child units 2 has a controlling section 20 that can move to a standby state, a measuring section 21, a signal receiving section 22 to receive a measurement instructing signal from the parent unit 3, and a signal transmitting section 23 to transmit the measured data by wireless communication. The parent unit 3 has a signal transmitting section to transmit the measurement instructing signal to each of the child units 2 and a measured data receiving section 32 to receive measured data to be transmitted from the signal transmitting section 23.

Claims

1. A wireless measuring device comprising:

a plurality of child units each having a specified identifier; and

a parent unit to receive data measured by the child units by wireless communication;

wherein each of said child units comprises a controlling section that can move to a standby state, a measuring unit, a measurement instructing signal receiving unit to receive a measurement instructing signal from said parent unit, an external timer and a measured data transmitting unit to transmit data measured by said measuring unit by wireless communication,

wherein said parent unit comprises a measurement instructing signal transmitting unit to transmit the measurement instructing signal to said child units by wireless communication and a measured data receiving unit to receive the measured data transmitted from said measured data transmitting unit,

wherein said child unit is so configured that said controlling unit of said child unit is put into a driving state from a standby state in every determined time and, when said measurement instructing signal receiving unit receives the measurement instructing signal, transmits data measured by said measuring unit to said parent unit in synchronization with individual transmission start time determined based on the identifier of each of said child units by using, as a reference time, transmission start reference time obtained based on reference time data contained in said measurement instructing signal, and

wherein said child unit is so configured that a time delay occurring between a standby state and a driving state of said controlling unit is compensated for in a manner to match real time shown by the external timer.

2. The wireless measuring device according to claim 1, wherein said parent unit has a synchronization signal transmitting unit to transmit, by wireless communication, a synchronization signal to synchronize said transmission start reference time to said child unit and wherein said child unit has a synchronization signal receiving unit to receive said synchronization signal transmitted from said synchronization signal transmitting unit and wherein the measured data is transmitted by using new transmission start reference time based on the received synchronization signal, as a reference time, instead of the transmission start reference time.

3. The wireless measuring device according to claim 1, wherein said measured data is transmitted by said measuring data transmitting unit at a frequency being different from a frequency at which said measurement instructing signal is transmitted by said measurement instructing signal transmitting unit.

4. The wireless measuring device according to claim 1, wherein each of said child units has a measured data storing unit to store measured data.

5. The wireless measuring device according to claim 1, wherein said measuring unit is a temperature measuring unit.

6. The wireless measuring device according to claim 2, wherein said child unit is so configured that a time delay occurring between a standby state and a driving state of said controlling unit is compensated for in a manner to match real time.

7. The wireless measuring device according to claim 2, wherein said measured data is transmitted by said measuring data transmitting unit at a frequency being different from a frequency at which said measurement instructing signal is transmitted by said measurement instructing signal transmitting unit.

8. The wireless measuring device according to claim 2, wherein each of said child units has a measured data storing unit to store measured data.

9. The wireless measuring device according to claim 3, wherein each of said child units has a measured data storing unit to store measured data.

10. The wireless measuring device according to claim 2, wherein said measuring unit is a temperature measuring unit.

11. The wireless measuring device according to claim 3, wherein said measuring unit is a temperature measuring unit.

12. The wireless measuring device according to claim 4, wherein said measuring unit is a temperature measuring unit.