| 摘要 |
<p>An apparatus is disclosed consisting of one or more machine monitors (4a-l) which attach to one or more machines to sense a physical characteristic of the machine, such as vibration or temperture, and produce wireless transmissions corresponding to the sensed characteristic, and a command station (6) which receives the transmissions from the machine monitors (4a-l) and processes the information to give an indication of the condition of the machine. The machine monitor incorporates a wireless transmitter (446) to transmit the sensor data, and the command station (6) incorporates a wireless receiver (618) to receive the sensor data. In the preferred embodiment of the invention, the machine monitors (4a-l) are not continuously on, but turn on only at preprogrammed times according to turn-on commands generated by a timer circuit (424) within each monitor. Each machine monitor includes a microcomputer (418) to analyze the sensor data and a memory (422) to store the analyzed sensor data. Repeaters (8a-d) to facilitate communication between the command station and machine monitors are necessary.</p> |
