초록 ▼

A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lidar, radar or sonar for example. As the sensor

A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lidar, radar or sonar for example. As the sensor signals are transmitted, the signals contact objects and are backscattered. The backscattered sensor signals are received to determine the location of objects as they pass through the transmission path. The speed and direction the object is moving may be calculated using the backscattered data. The data may be plotted in a two dimensional array with a scan angle on one axis and a scan time on the other axis. The prominent curves that appear in the plot may be analyzed to determine the speed and direction the object is traveling.

대표청구항 ▼

A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lidar, radar or sonar for example. As the sensor

A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lidar, radar or sonar for example. As the sensor signals are transmitted, the signals contact objects and are backscattered. The backscattered sensor signals are received to determine the location of objects as they pass through the transmission path. The speed and direction the object is moving may be calculated using the backscattered data. The data may be plotted in a two dimensional array with a scan angle on one axis and a scan time on the other axis. The prominent curves that appear in the plot may be analyzed to determine the speed and direction the object is traveling. based on the instantaneous position of the vehicle, an entered destination and at least one proposed route. cting between a plurality of sets of stored electronic data, wherein each of said sets defines a viewable electronic image displayable on said display means. 10. An electronic picture frame device comprising: a housing having a back wall, a top wall, a bottom wall and a pair of side walls, each of said side walls having a back edge and a front edge wherein said back edges abut said back wall, said front edges angling outwardly from said top wall to said bottom wall such that an angle defined by said front edges and a bottom edge of each of said side walls is generally between 85 degrees and 65 degrees, said back and top walls having a plurality of elongated slots therein extending into an interior of said housing; a display means for displaying an electronic image, said display means having a backside and a viewing side, said back side being integrally coupled to said front edges of said housing such that a bottom edge of said backside is abutting said bottom wall of said housing such that a central portion of a bottom edge of said backside is abutting said bottom wall of said housing, said display means comprising a liquid crystal display; a control means for controlling a video signal to said display means being operationally coupled to said display mean, said control means being positioned in said housing; a power supply being operationally coupled to said control means; an interface means for interfacing, a plurality of peripherals with the control means, said interface means being positioned in one of said side walls of said housing and operationally coupled to said control means, said interface means comprising a computer port, a digital camera port and a scanner port; a memory storage means for storing electronic data, said memory storage means being positioned in said housing and operationally coupled to said control means, wherein said memory storage means stores electronic data transferred from said control means from said peripherals; a plurality of actuators being positioned on one of said side walls of said housing and being operationally coupled to said control means, a first of said actuators being adapted for selecting between a plurality of sets of stored electronic data, wherein each of said sets defines a viewable electronic image displayable on said display means, a second of said actuators being adapted for initiating a menu on said display means, a third and fourth of said actuators being adapted for selecting choices on said menu; and wherein said backside of said display means extends outwardly from said front edges of said housing for facilitating concealment of said housing behind said display means to a viewer positioned indirectly in front of said viewing side of said display means. t being configured to read the access information contained on the card after the circuit detects first the absence of electromagnetic energy, then the presence of intermittent electromagnetic energy, then the absence of intermittent electromagnetic energy during a preset period of the card being hold adjacent the circuit; and the circuit being configured to determine an amount of time that elapses between detecting the absence of electromagnetic energy and detecting the presence of the intermittent electromagnetic energy and between detecting the presence of the intermittent electromagnetic energy and detecting the absence of the intermittent electromagnetic energy. 2. The security system of claim 1 wherein the circuit includes a power portion, a wake-up portion, and a reader portion, the wake-up portion has a first amount of current draw from the power portion when the wake-up portion detects the presence and absence of electromagnetic energy, the reader portion has a second amount of current draw from the power portion when the reader portion reads the access information, and the second amount of current draw is greater than the first amount of current draw. 3. The security system of claim 1 wherein the circuit includes a capacitive read head. 4. The security system of claim 1 wherein the circuit includes an inductive read head. 5. The security system of claim 1 wherein the circuit includes a read head that senses electrical charge. 6. The security system of claim 1 wherein the circuit includes reader electronics, a wake-up circuit portion, a power source, a switch having a first state in which the power source is coupled to the reader electronics, and a second state in which the power source is not coupled to the reader electronics, the wake-up circuit switching the switch from the second state to the first state when the wake-up circuit detects the presence of the card. 7. The security system of claim 1 wherein the circuit configured to detect first the absence of electromagnetic energy, then the presence of electromagnetic energy, then the absence of electromagnetic energy includes a circuit configured to detect first the absence of infrared energy, then the presence of infrared energy, then the absence of infrared energy. 8. The security system of claim 1 wherein the circuit configured to detect first the absence of electromagnetic energy, then the presence of electromagnetic energy, then the absence of electromagnetic energy includes a circuit configured to detect first the absence of ultrasonic energy, then the presence of ultrasonic energy, then the absence of ultrasonic energy. 9. The security system of claim 1 wherein the circuit configured to detect first the absence of electromagnetic energy, then the presence of electromagnetic energy, then the absence of electromagnetic energy includes a circuit configured to detect first absence of a magnetic field, then the presence of a magnetic field, then the absence of a magnetic field. 10. The security system of claim 1 wherein the circuit includes an emitter that emits electromagnetic energy at least intermittently, the card being configured to reflect the electromagnetic energy emitted by the emitter when the card is placed in a path of electromagnetic energy emitted by the emitter, and the circuit further includes a detector that is configured to detect the reflected electromagnetic energy. 11. A security system for locking and unlocking a door, the security system comprising a card containing access information, a locking mechanism associated with the door, a reader that, when activated, can read access information contained on the card, access control electronics that, when activated, can receive access information read by the reader and process the received access information to determine if the received access information is valid, the access control electronics being configured to signal the locking mechanism to unlock the door if the received access inf ormation is valid, and a wake-up circuit configured to detect the proximal presence of the card and, if the wake-up circuit detects the presence of the card, to activate the access control electronics and the reader, the wake-up circuit including an emitter that emits electromagnetic energy at least intermittently and a detector that detects intermittent electromagnetic energy reflected by the card, the wake-up circuit detecting the presence of the card by sensing with the detector that electromagnetic energy first was absent, then reflected intermittent electromagnetic energy was present, then the intermittent electromagnetic energy was absent again during a preset period of the card being adjacent the detector. 12. The security system of claim 11 further comprising a power source, the wake-up circuit drawing a first current from the power source when the wake-up circuit operates, the reader drawing a second current from the power source when the reader operates, the first current having a smaller magnitude than the second current. 13. The security system of claim 12 wherein the access control electronics draws a third current from the power source when the access control electronics operates, the third current having a larger magnitude than the first current, and the third current having a smaller magnitude than the second current. 14. The security system of claim 13 wherein the locking mechanism draws a fourth current from the power source to unlock the door, the fourth current having a larger magnitude than each of the first, second, and third currents. 15. The security system of claim 11 wherein the reader includes a capacitive read head. 16. The security system of claim 11 wherein the reader includes an inductive read head. 17. The security system of claim 11 wherein the reader includes a read head that senses electrical charge. 18. The security system of claim 11 further comprising a power source and a switch, the switch having a first state in which the power source is coupled to the reader and a second state in which the power source is not coupled to the reader, the wake-up circuit switching the switch between the first and second states. 19. The security system of claim 11 wherein the emitter that emits electromagnetic energy and the detector that detects electromagnetic energy comprise an emitter that emits infrared energy and a detector that detects infrared energy. 20. The security system of claim 11 wherein the emitter that emits electromagnetic energy and the detector that detects electromagnetic energy comprise an emitter that emits ultrasonic energy and a detector that detects ultrasonic energy. 21. The security system of claim 11 wherein the emitter that emits electromagnetic energy and the detector that detects electromagnetic energy comprise an emitter that generates a magnetic field and a detector that detects a magnetic field. 22. The security system of claim 11 wherein the wake-up circuit is configured to determine an amount of time that elapses between detecting the absence of electromagnetic energy and detecting the presence of the reflected intermittent electromagnetic energy. 23. The security system of claim 11 wherein the wake-up circuit is configured to determine an amount of time that elapses between detecting the presence of the reflected intermittent electromagnetic energy and detecting the absence of the reflected intermittent electromagnetic energy. 24. A security system comprising a locking mechanism of a door, a card containing access information, a power source, reader electronics configured to read the access information contained on the card, the reader electronics normally being powered down, access control electronics configured to process the information that is contained on the card and that is read by the reader electronics, the access control electronics being configured to signal the locking mechanism to unlock the door when the information read by the reader electronics is determined by the access control electronics to be valid, the access control electronics normally being powered down, and a wake-up circuit configured to detect the presence of the card, the power source being coupled to the wake-up circuit to provide power to the wake-up circuit, the wake-up circuit being coupled to the reader electronics and to the access control electronics, the wake-up circuit being configured to power up the reader electronics to read the card after the wake-up circuit detects the presence of the card, the wake-up circuit being configured to power up the access control electronics to receive the access information read by the reader electronics and to process the access information after the wake-up circuit detects the presence of the card, the wake-up circuit having a proximal detector configured to detect intermittent electromagnetic energy, the wake-up circuit being configured to power up the reader electronics and the access control electronics after the wake-up circuit determines (i) that electromagnetic energy was absent at the detector at a first time, (ii) that intermittent electromagnetic energy was present at the detector at a second time after the first time, and (iii) that intermittent electromagnetic energy was absent at the detector at a third time after the second time during a preset period of the card being adjacent the detector. 25. The security system of claim 24 wherein the wake-up circuit comprises an emitter that the intermittently emits electromagnetic energy and the intermittent electromagnetic energy detected by the detector is the intermittent electromagnetic energy that is reflected by the card. 26. The security system of claim 25 wherein the emitter comprises an infrared emitter and the detector comprises an infrared detector. 27. The security system of claim 24 wherein the wake-up circuit is configured to determine an amount of time that elapses between the first time and the second time. 28. The security system of claim 24 wherein the wake-up circuit is configured to determine an amount of time that elapses between the second time and the third time. 29. The security system of claim 24 wherein the detector configured to detect electromagnetic energy comprises a detector configured to detect infrared energy. 30. The security system of claim 24 wherein the detector configured to detect electromagnetic energy comprises a detector configured to detect ultrasonic energy. 31. The security system of claim 24 wherein the detector configured to detect electromagnetic energy comprises a detector configured to detect a magnetic field. 32. A method for operating a security system to unlock a door, the method comprising: emitting intermittent electromagnetic energy from an emitter, detecting a first absence of electromagnetic energy with a proximity detector capable of sensing the presence and absence of electromagnetic energy during a preset period of an access card being adjacent the detector, detecting a presence of intermittent electromagnetic energy with the detector, detecting a second absence of the intermittent electromagnetic energy with the detector, supplying power from a power source to a reader after detecting the sequence above of the absence, presence and absence of electromagnetic energy with the detector to enable the reader to read access information contained on the access card selectively oriented in proximity to the reader, supplying power from the power source to an access control circuit after detecting the sequence above of the absence, presence and absence of electromagnetic energy with the detector to enable the access control circuit to receive from the reader access information read by the reader and to process the access information to determine whether the access information is valid, and sending a signal from the circuit to a locking mechanism to unlock the door when the access information on the card is determined to be valid by the access c