Electrical data collecting device

• US 4,053,714 A
• Filed: 04/06/1976
• Issued: 10/11/1977
• Est. Priority Date: 04/06/1976
• Status: Expired due to Term

• Current Assignee: Direct Digital Industries Limited
• Original Assignee: Canadian PGL Electronics Incorporated
• Inventors: Long, Robert G.
• Primary Examiner(s): Stewart, David L.
• Application Number:
  US05/674,130
• Time in Patent Office: 553 Days
• Field of Search: 179/2 AM, 179/15 AL, 179/15 BD, 179/15 BI, 340/151, 340/147 LP, 340/150, 340/182, 340/183, 340/203
• US Class Current: 340/870.14
• CPC Class Codes: G08C 15/12 the signals being represented by pulse characteristics in transmission link

Abstract

This invention relates to data transmission system of the type where a plurality of transmitters are located at a location remote from a receiver and are adapted to transmit information from their location in turn to the receiver. The transmitters in the case of this invention are each self-powered and have their own transmitter timer associated with them. They are all set to operate from time zero by a master timer and their individual power sources are recharged for the power dissipated in each of their transmissions by a charging pulse that is received over the transmission line. The resetting of the transmitter timers to cause them to transmit in sequence is done during the recharging period which follows the transmissions of the series of transmitters.

Claims

1. An electrical data transmitting system for collection and transmission of data from a plurality of remote locations comprising:

a plurality of data transmitting devices each having an input, an output and a rechargeable power source;

a plurality of remotely-located data sensors electrically connected to the inputs of said data transmitting devices, said sensors being constructed to sense data at their respective locations and conduct a corresponding signal to the input of said data transmitting device;

a plurality of transmitting device timers, each of which is electrically connected to a respective one of said data transmitting devices;

a data receiving device having an input and being constructed to receive at said input data signals from the outputs of said data transmitting devices;

a data transmission line for electrically connecting the input of said data receiving device and the outputs of said data transmitting devices;

a recharging voltage source for recharging each of said rechargeable power sources through said data transmission line;

means for setting the transmitting device timer of each of said data transmitting devices to connect for a time interval one of said data transmitting devices to said data transmission line whereby the plurality of data transmitting devices are connected to and disconnected from said data transmission line, one at a time, in a predetermined time sequence; and

a master timer electrically connected to said data transmission line and constructed to be cyclically operable to dictate connection of said recharging voltage source to said data transmission line to recharge said rechargeable power sources for a time interval following sequential data transmission by said plurality of data transmitting devices, said means for setting the transmitting device timers being responsive to operation of said master timer.

2. The electrical data transmitting system of claim 1 in which each of said data transmitting devices has more than one sensor.

3. The electrical data transmitting system of claim 1 in which said data sensor of said transmitter is electrically powered from the rechargeable power source of its data transmitting device.

4. The electrical data transmitting system of claim 1 in which said data sensor of said data transmitting device, is electrically powered from the rechargeable power source of its data transmitting device, said data sensor being intermittently powered under control of the transmitting device timer of its respective data transmitting device to provide a signal for transmission of its respective data transmitting device.

5. The electrical data transmitting system of claim 1 in which said data sensor of said data transmitting device is electrically powered from the rechargeable power source of its data transmitting device, each of said data transmitting devices having more than one data sensor.

6. The electrical data transmitting system of claim 1 in which said data sensor of said data transmitting device is electrically powered from the rechargeable power source of its data transmitting device, each of said data transmitting devices having more than one data sensor, said data sensors being intermittently powered under control of the transmitting device timer of their respective data transmitting device to provide a signal for transmission of its respective data transmitting device.