Microwave control system

• US 20090079548A1
• Filed: 11/16/2007
• Published: 03/26/2009
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: Unified Packet Systems Corp.
• Original Assignee: Unified Packet Systems Corp.
• Inventors: Lin, Wei-Cheng, Hu, Yu-Wen
• Granted Patent: US 7,978,052 B2
• Time in Patent Office: Days
• US Class Current: 340/10.330
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs

Abstract

A microwave control system is applied to control a working system to execute at least one predetermined assignment, and comprises a microwave control unit, a control card and a passive control unit. A microwave illuminator of the microwave control unit is applied to send a microwave signal. After receiving the microwave signal, the control card reflects a reflection signal to the microwave control unit, wakes up from a first sleep mode to enter a first awake mode, and sends a first control signal to the passive control unit. After the microwave control unit receives the reflection signal, the passive control unit wake up from a second sleep mode to enter a second awake mode, and the passive control unit transmits a second control signal in accordance with the first control signal to the working system, so as to control the working system to execute the predetermined assignment.

Claims

1. A microwave control system being applied to control a working system to execute at least one predetermined assignment, and comprising:

a microwave control unit, comprising;

a microwave illuminator for sending a microwave signal;

a first micro control unit; and

a first wireless signal transceiver coupled with the first micro control unit;

a control card, comprising;

an antenna assembly for effectively receiving the microwave signal within an effective triggering region, and generating a first wake-up signal in accordance with the microwave signal;

a second micro control unit coupled with the antenna assembly, being waked up from a first sleep mode to enter a first awake mode after receiving the first wake-up signal, and generating a first control signal under the first awake mode hereafter;

a second wireless signal transceiver coupled with the second micro control unit, so as to send out a first control signal;

a passive control unit comprising;

a third micro control unit coupled with the first micro control unit and the working system; and

a third wireless signal transceiver for receiving the first control signal and transmitting the first control signal to the third micro control unit;

wherein the control card reflects the a reflection signal to transmit a reflection signal to the first wireless signal transceiver, the first micro control unit transmits a second wake-up signal to the third micro control unit after the first wireless signal transceiver receives the reflection signal to make the third micro control unit be waked up from a second sleep mode to enter a second awake mode, and further to make the third micro control unit transmit a second control signal to the working system, so as to control the working system to execute the predetermined assignment.

2. The microwave control system as claimed in claim 1, wherein the control card comprises a card body having a first surface and a second surface opposite to the first surface, and the antenna assembly further comprises a first antenna circuit deposited on the first surface, and a second antenna circuit deposited on the second surface.

3. The microwave control system as claimed in claim 2, wherein the control card further comprises a power combination circuit coupled with the first antenna circuit and the second antenna circuit, so as to combine the microwave signal received by the first antenna circuit and the second antenna circuit.

4. The microwave control system as claimed in claim 2, wherein both the first antenna circuit and the second antenna circuit respectively comprise a micro-strip antenna.

5. The microwave control system as claimed in claim 1, wherein the control card further comprises a microwave detecting circuit electrically connected between the antenna assembly and the first micro control unit, so as to transfer the microwave signal to a voltage signal with respect to the microwave signal.

6. The microwave control system as claimed in claim 5, wherein the control card further comprises a filtering circuit electrically connected between the microwave detecting circuit and the first micro control unit, so as to filter the voltage signal.

7. The microwave control system as claimed in claim 6, wherein the control card further comprises an amplifier electrically connected between the filtering circuit and the first micro control unit, so as to amplify the voltage signal.

8. The microwave control system as claimed in claim 7, wherein the control card further comprises a temperature compensation circuit coupled with the amplifier, so as to compensate the voltage signal in accordance with a temperature property parameter of the amplifier.

9. The microwave control system as claimed in claim 7, wherein the control card further comprises a level comparison circuit electrically connected between the amplifier and the first micro control unit, so as to analyze a voltage level of the voltage signal.

10. The microwave control system as claimed in claim 7, wherein the control card further comprises sensitivity adjustment circuit coupled with the level comparison circuit, so as to adjust the effective triggering region.

11. The microwave control system as claimed in claim 7, wherein the working system is an access control system, the control card is an access control card, and the predetermined assignment is an access control assignment.

12. The microwave control system as claimed in claim 1, wherein the second control signal is generated in accordance with the first control signal.

13. The microwave control system as claimed in claim 1, wherein the third micro control unit sends a feedback control signal to the control card via the third wireless signal transceiver under the second awake mode.

14. The microwave control system as claimed in claim 13, wherein the feedback control signal is received by the second wireless signal transceiver and transmitted to the second micro control unit.

15. The microwave control system as claimed in claim 13, wherein the second micro control unit generates the first control signal in accordance with the feedback control signal.