Ground probing radar with multiple antenna capability

• US 5,248,975 A
• Filed: 06/26/1991
• Issued: 09/28/1993
• Est. Priority Date: 06/26/1991
• Status: Expired due to Term

• Current Assignee: Geophysical Survey Systems, Inc.
• Original Assignee: Geophysical Survey Systems, Inc.
• Inventors: Schutz, Alan E.
• Primary Examiner(s): Barron, Jr., Gilberto
• Application Number:
  US07/721,040
• Time in Patent Office: 825 Days
• Field of Search: 342/22, 342/70, 342/179, 342/21, 342/202, 342/204
• US Class Current: 342/21
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/885 for ground probing prospecting or detecting using electromagnetic waves G01V3/12
• CPC Class Codes: G01S 7/282 Transmitters
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

A ground probing radar system comprising a plurality of antennas for transmitting. Where for each transmitting antenna, an associated individual driver means selectively operable in response to an enabling signal unique to each antenna. Upon receiving a triggering signal, the driver means supplies to its associated antenna a single impulse of power to be radiated. Further providing that a means for supplying the trigger signal to each of the driver means only one at a time, thereby insuring that no two antennas are supplied power to be radiated at the same time.

Claims

1. A radar system comprising:

a. a plurality of antennas for transmitting;

b. for each transmitting antenna, an associated individual driver means selectively operable in response to an enabling signal unique to said antenna, upon receiving a triggering signal, for supplying to the associated antenna a single impulse of power to be radiated; and

c. means for supplying said trigger signal to each of said driver means, but only to one of said driver means at a time, such that no two antennas are supplied power to be radiated at the same time.

2. The radar system of claim 1 further including means for supplying only one enabling signal at a time, thereby avoiding multiple simultaneous antenna operation.

3. The radar system of claim 1 wherein said driver means includesan avalanche transistor circuit for generating in response to receipt of a trigger signal a voltage impulse, andmeans responsive to the enabling signal for gating said impulse to the antenna.

4. The radar system of claim 2 or claim 3 further including means for supplying high voltage power to each transmit antenna and means for disabling the means for supplying high voltage power if an antenna is not connected to said driver means.

5. A radar system comprising:

a plurality of antennas for transmitting;

for each transmitting antenna, an associated individual driver means including first connector means for receiving a triggering signal and second connector means electrically interconnected to said first connector for supplying a triggering signal output which may thereby be connected to another driver means, each driver means being selectively operable in response to an enabling signal supplied thereto, upon receiving said triggering signal, for supplying to the associated antenna a single impulse of power to be radiated;

means for supplying said triggering signal; and

means for supplying an enabling signal to each of said driver means but only to one driver means at a time.

6. The radar system of claim 5 wherein the means for supplying the enabling signals is a processor which is programmable to permit the plurality of driver means to be operated in any desired sequence.

7. A radar system constructed and arranged in a modular fashion, comprising:

a. a processing unit;

b. at least one input/output device;

c. at least one input/output port for interfacing the processing unit with each input/output device;

d. at least one memory unit;

e. a radar board unit; and

f. at least one transducer interface module, each transducer interface module having a plurality of ports wired to connectors, each for connection to an antenna;

the radar board unit including means for generating a high voltage signal and a timing pulse signal for activation of transmitting antennas, via the transducer interface modules, at appropriate times, and further including means for generating high voltage and timing signals for receive antennas, supplied to said receive antennas via the transducer interface modules;

each transducer interface module including means for controlling the application of a transmit pulse to each of its antenna connectors and means for routing received signals from antenna connectors to receive signal processing circuitry.

8. The radar system of claim 7 wherein each transducer interface module receives a plurality of control signals from the radar board unit and wherein each transducer interface module further comprises means for decoding a serial command stream from the radar board unit, means for receiving control signals from the radar board unit, and means for supplying to a connector, to which another transducer interface module may be connected, a copy of said control signals, whereby a transmit trigger pulse supplied to a first transducer interface module in the system will be distributed in a "daisy chain" sequence to all transducer interface modules in the system.