초록 ▼

A high-velocity, accurately responsive impingement heater provides heated air at a substantially constant temperature to a process location to effect control of a process. The heater includes an air line for conducting air from an inlet thereof to the process location. A heat exchanger, including a

A high-velocity, accurately responsive impingement heater provides heated air at a substantially constant temperature to a process location to effect control of a process. The heater includes an air line for conducting air from an inlet thereof to the process location. A heat exchanger, including a plurality of electrical heating elements, heats air conducted through the air line. A power driver is connected to the heat exchanger and applies current to the heat exchanger. A controller is connected to the driver and receives a predetermined process temperature input from the user, as required for effecting control of the process. A process temperature sensor is positioned at the process location and measures the temperature of the air provided to the process location. The process temperature sensor provides a process temperature signal to the controller which is indicative of the air temperature at the process location. An internal temperature sensor is positioned immediately downstream from the heat exchanger and measures the temperature of the air at that location in the air line. The internal temperature sensor provides an internal temperature signal to the controller which is indicative of the air temperature downstream from the heat exchanger. Based upon the temperature signals from the temperature sensors, the controller provides a control signal to the driver for specifying the amount of heat required at the process location in order for the heated air to substantially equal the predetermined process temperature. The driver then applies a corresponding current to the heat exchanger in response to the control signal.

대표청구항 ▼

A high-velocity, accurately responsive impingement heater provides heated air at a substantially constant temperature to a process location to effect control of a process. The heater includes an air line for conducting air from an inlet thereof to the process location. A heat exchanger, including a

A high-velocity, accurately responsive impingement heater provides heated air at a substantially constant temperature to a process location to effect control of a process. The heater includes an air line for conducting air from an inlet thereof to the process location. A heat exchanger, including a plurality of electrical heating elements, heats air conducted through the air line. A power driver is connected to the heat exchanger and applies current to the heat exchanger. A controller is connected to the driver and receives a predetermined process temperature input from the user, as required for effecting control of the process. A process temperature sensor is positioned at the process location and measures the temperature of the air provided to the process location. The process temperature sensor provides a process temperature signal to the controller which is indicative of the air temperature at the process location. An internal temperature sensor is positioned immediately downstream from the heat exchanger and measures the temperature of the air at that location in the air line. The internal temperature sensor provides an internal temperature signal to the controller which is indicative of the air temperature downstream from the heat exchanger. Based upon the temperature signals from the temperature sensors, the controller provides a control signal to the driver for specifying the amount of heat required at the process location in order for the heated air to substantially equal the predetermined process temperature. The driver then applies a corresponding current to the heat exchanger in response to the control signal. o automatically obtain activity/recording data comprises: using the image signal set to obtain an identifier of the manual annotating activity; the activity/recording data including a pair of items of data, the pair including the identifier of the manual annotating activity and an identifier of the portion of the recording. 5. The method of claim 4 in which the act of receiving a recording portion signal comprises: receiving, during the period of time within which the manual annotating activity is performed and the portion of the recording is made or played, a time selection signal from a user selecting a time within the period; and obtaining, in response to the time selection signal, a timestamp indicating the time within the recording that corresponds to the selected time; the timestamp being the identifier of the portion of the recording. 6. The method of claim 1, further comprising printing the machine-readable markings on the marking medium. 7. The method of claim 6, wherein the machine-readable markings printed on the marking medium are visible or invisible. 8. The method of claim 7, wherein the marking medium is paper. 9. A method for obtaining data associating manual annotating activities with portions of recordings, the method comprising: using an image input device to produce an image signal set, the image signal set defining a set of one or more images that include information about a manual annotating activity that occurs during a period of time within which a portion of a recording is made or played; the manual annotating activity being performed on a marking medium; the image signal set defining a set of one or more images of the marking medium; using a recording/playback device to obtain a recording portion signal providing information about the portion of the recording; and using the image signal set and the recording portion signal to automatically obtain activity/recording data that associate information about the manual annotating activity with information identifying the portion of the recording; in which the manual annotating activity being performed on a marking medium; the image signal set defining a set of one or more images of the marking medium; and in which the manual annotating activity is performed at a position of the marking medium and the image signal set defines a before image showing the marking medium before the manual annotating activity and an after image showing the marking medium after the manual annotating activity; the act of using the image signal set and the recording portion signal to automatically obtain activity/recording data comprising: comparing the before image and the after image to obtain position data indicating the position at which the manual annotating activity is performed. 10. A system for obtaining and using data associating manual annotating activities with portions of recordings, the system comprising: recording/playback circuitry for making or playing recordings; an image input circuitry for providing image signals defining images; and processing circuitry connected for receiving image signals from the image input circuitry and connected for receiving information about a recording being made or played by the recording/playback circuitry; the processing circuitry operating to: receive an image signal set from the image input circuitry, the image signal set defining a set of one or more images that include information about a manual annotating activity that occurs during a period of time within which a portion of a recording is made or played; receive a recording portion signal from the recording/playback circuitry providing information about the portion of the recording; and using the image signal set and the recording portion signal to automatically obtain activity/recording data that associate information about the manual annotating activity with information identifying the portion of the recording; in which the processing circuitr y is further connected for causing the recording/playback circuitry to play back portions of the recording; the processing circuitry further operating to: receive a second image signal set from the image input circuitry; the second image signal set providing information about a manual request activity; use the second image signal set to automatically obtain activity data that include information about the manual request activity; if the information about the manual request activity and the information about one of the manual annotating activities meets a similarity criterion, use the activity data and the activity/recording data to obtain portion identifying data identifying the portion of the recording associated with the manual annotating activity; and use the portion identifying data to provide a portion playback signal to the recording/playback circuitry causing playback of the portion of the recording. 11. The system of claim 10 in which the activity/recording data include an annotation identifier and a timestamp, the system further comprising: a table containing pairs of items of data; each pair including an annotation identifier and a timestamp; the processing circuitry further operating to store the activity/recording data in the table. 12. The system of claim 11 in which the manual annotating activity produces an annotation; the image signal set defining an image of the annotation; the table further containing, for each pair, annotation image data defining the image of the annotation. 13. The system of claim 10 in which the manual annotating activity produces an annotation; the system further comprising user selection circuitry for providing selection signals indicating annotations selected by a user; the processing circuitry being connected for receiving the selection signals and for causing the recording/playback circuitry to play back portions of the recording; the processing circuitry further operating to: receive a selection signal indicating one of the annotations from the user selection circuitry; use the selection signal and the activity/recording data to obtain portion identifying data identifying the portion of the recording associated with the manual annotating activity; and use the portion identifying data to provide a portion playback signal to the recording/playback circuitry causing playback of the portion of the recording. 14. A method for using activity/recording data associating annotating activities with portions of recordings to play back portions of recordings, the method comprising: using an image input device to produce an image signal set, the image signal set defining a set of one or more images of a marking medium that include information about a manual activity relating to the marking medium; using the image signal set to automatically obtain activity data including information about the manual activity; using the activity data and the activity/recording data to obtain portion identifying data identifying a portion of the recording; the activity/recording data associating information about an annotating activity with the identified portion of the recording; the information about the manual activity included in the activity data and the information about the annotating activity meeting a similarity criterion; and using the portion identifying data to provide a portion playback signal to playback circuitry causing playback of the identified portion of the recording; in which the manual activity is performed in a region of the marking medium that bears machine-readable markings encoding a position identifier for the region and the image signal set defines a set of one or more images of the region of the marking medium; the machine-readable markings existing in the region of the marking medium before the manual activity is performed; the act of using the image signal set to automatically obtain activity data comprising: using the image signal set to obtain position