摘要:
A digital data communication system enables host computer to communicate with a great number of data terminals having specified functions. Communication from the host computer proceeds through a medium or long distance, high power transceiver and through a multiplex system to one of a number of portable communication devices. The communication devices preferably contain internal power supplies, such as rechargeable NiCad battery packs. The devices may be carried on a person's belt, or may be mounted within or on a service vehicle, for example, a forklift truck for use in warehouse operations or a merchandise delivery route vehicle. The communication devices are adapted to function as communication relay devices between the host computer and selected ones of the data terminals. Each communication device includes a first type, low power transceiver to communicate within a first channel and at a low power transmission level with a selected number of the data terminals which also feature such first type transceivers. Each communication device further includes a high power transceiver to communicate within a second channel with the transceiver of the host computer. A microprocessor operated address controller allows the communication device to control low power communication among the data terminals by receiving and re-transmitting locally directed communications. The controller and the controlling protocol further relays data messages between the low power communication level and host computer. In operation the device receives data messages on one of the transceivers and transmits them on the other. The communication device further may contain sufficient memory capacity to permit periodic batch type data transmission between the host computer and the communication device. The ability to switch from a high power, high precision and high cost transmission system to a low power, low precision and low cost transmission system at the level at which a great number of data terminal devices are used provides system flexibility at a reasonable cost.
摘要:
Systems and methods of optical code reading include production of image data by a color image sensor array (102) and processing of the image data to decode an optical code (112). In one configuration, the color image sensor array includes first and second sets of sensor pixels (204, 206, and/or 208) sensitive to light having wavelengths within, respectively, first and second wavelength bands, reflected light is focused by an optical system (104) to form an image of an optical code on the color image sensor array, first and second sets of image data representing light intensity levels sensed by, respectively, the first and second sets of sensor pixels are produced, and the first set of image data is processed to determine whether the second set of image data is to be used in combination with the first set of image data to decode the optical code.
摘要:
A device for the acquisition of data obtained from optical codes, comprises a CMOS optical sensor (5) comprising a plurality of pixels, said CMOS optical sensor (5) being adapted to generate signals correlated to the brightness of at least one image of an optical code, and acquisition means for acquiring signals from said CMOS optical sensor (5) according to a first configuration and at least one second configuration, said first configuration being suitable for acquiring a first type of optical code and said at least one second configuration being suitable for acquiring at least one second type of optical code different from the first type, and wherein said first and at least one second configurations are different from one other at least in one of pixel shape and pixel dimension.
摘要:
There is provided an integrated semiconductor source-detector matrix (10) in which solid state photonic diodes (12a-12i) are configured as LEDs, disposed on a substrate and coupled to electronic circuits so that the diodes can be individually driven to emit light to detect light as may be desired. Providing an integrated matrix (10) of light source and light sensor units disposed in close proximity results in each unit having nearly coextensive fields of view and illumination (157). Apparatus, such as bar code and optical readers utilizing such a matrix are shown, and are insensitive to the diffusion and laminate effects. In alternate embodiments the matrix (10) is coupled to remote sensors (94) or another similar matrix to provide optical communication and inter-change devices having high bandwidth.
摘要:
Procédé et appareil de lecture et de focalisation d'un code à barres utilisant un réseau photosensible (112B) et déterminant le taux de conversion d'intensité par rapport au temps et focalisant l'image en fonction de la sortie du réseau photosensible. Un module de collecte de données (48) comprenant un lecteur de code à barres et un émetteur-récepteur radio est également décrit.
摘要:
A signal amplitude shaping circuit is interposed between a signal source and a signal input terminal of a frequency modulation circuit of a typical voice radio transmitter or transceiver unit. The amplitude shaping circuit includes a high-impedance sampling circuit which senses the steady state bias voltage at the signal input terminal during periods when no data are being transmitted. Upon receipt of a transmit-enable signal, the most recently sensed bias voltage is stored and positive and negative offset voltages are generated with respect to the stored voltage. One of the offset voltages is adjusted as a precisely determined voltage with respect to the stored voltage. The other of the offset voltages is generated by inverting the first, adjusted voltage, such that the two offset voltages are offset by equal values in opposite directions. An analog switch is adapted to receive a sequence of digital signals and to apply the positive and negative offset voltages to the signal input terminal in a sequence corresponding to the binary signal sequence of the received data signals.
摘要:
An optical information code reading method, including reading an optical information code image by an optical information code scanner immediately after the optical information code image has been recorded onto an information recording medium, wherein the optical information code scanner includes an amplitude tuning unit configured to correct a detected amplitude level of reflectivity from the information recording medium on which the optical information code image has been recorded and to store the corrected detected amplitude level, and wherein the optical information code scanner reads the optical information code image in a state in which the optical information code scanner has read the information recording medium on which the optical information code image has been recorded, and the amplitude tuning unit has determined and stored a detected amplitude level optimum for reading.
摘要:
An optical information code reading method, including reading an optical information code image by an optical information code scanner immediately after the optical information code image has been recorded onto an information recording medium, wherein the optical information code scanner includes an amplitude tuning unit configured to correct a detected amplitude level of reflectivity from the information recording medium on which the optical information code image has been recorded and to store the corrected detected amplitude level, and wherein the optical information code scanner reads the optical information code image in a state in which the optical information code scanner has read the information recording medium on which the optical information code image has been recorded, and the amplitude tuning unit has determined and stored a detected amplitude level optimum for reading.