Data reading method and device of photovoltaic direct-reading water meter
A data reading, photoelectric direct reading technology, applied in non-electrical signal transmission systems, signal transmission systems, instruments, etc., can solve the problems of high output current requirements, high cost, large reading error, etc., to achieve low cost and reduce use. , to achieve a simple effect
Active Publication Date: 2014-06-04
LIERDA SCI & TECH GRP
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Problems solved by technology
[0003] The existing photoelectric direct-reading water meter data reading device has high requirements on the output current of the I / O port of the control chip, the reading error is large, and the cost is relatively high
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[0025] Example. A data reading method of a photoelectric direct reading water meter. By controlling the infrared rays emitted by the photoelectric emitting tube group, after passing through the hardware encoder, multiple reading states are formed for each bit of data, and are received by the photoelectric receiving tube group and sent to the The control chip determines the display status of each bit of data according to the current reading status of each bit of data.
[0026] By controlling the infrared rays emitted by the photoelectric emission tube group, the adjacent photoelectric emission tubes in the photoelectric emission tube group are arranged at an included angle; and the adjacent photoelectric receiving tubes in the corresponding photoelectric receiving tube group are in a corresponding The included angle setting, the included angle range is 34°-38°. The included angle is preferably 36 degrees.
[0027] In the photoelectric emission tube group, the number of photoe...
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The invention discloses a data reading method and device of a photovoltaic direct-reading water meter. The method comprises the following steps: controlling infrared rays sent by a photoemissive tube group so as to enable the infrared rays to pass through a hardware encoder to form multiple reading states on each data, receiving the infrared rays by a photovoltaic receiver tube group so as to be sent a control chip, and determining the display status of each data through the control chip according to the current reading state of each data. The device comprises a photovoltaic drive circuit (1), a photovoltaic panel circuit (2), the hardware encoder (3) and the control chip (4). The circuit is adopted, the control chip is used for controlling the alternate conduction of a phototube, the requirement on the output current of the I / O (input / output) port of the control chip is reduced, and the use of the I / O port of the control chip is reduced. By utilizing the data reading method provided by the invention, the reading is accurate; and the data reading method is not only simple and convenient to realize, but also low in cost, and has obvious advantages in the field of remote meter reading.
Description
technical field [0001] The invention relates to a data reading method and device, in particular to a data reading method and device for a photoelectric direct reading water meter. Background technique [0002] The photoelectric direct-reading water meter is a new type of remote electronic meter. Its core function is to encode the data in the water meter counter through the infrared rays emitted by the photoelectric tube and the word wheel, and then transmit the code to the remote reader for decoding. Read out the data in the counter. Photoelectric direct reading water meters are widely used in remote meter reading systems. [0003] The existing photoelectric direct-reading water meter data reading device has high requirements on the output current of the I / O port of the control chip, large reading error and high cost. Contents of the invention [0004] The object of the present invention is to provide a data reading method and device for a photoelectric direct reading wa...
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IPC IPC(8): G08C23/04
Inventor 雷俊勇马立波陈秋煌
Owner LIERDA SCI & TECH GRP