Data transmission system, method and device and medium
A data transmission system and technology for sending data, applied in signal transmission systems, electrical signal transmission systems, analog/digital conversion, etc. Efficiency and accuracy, the effect is the same as above
Pending Publication Date: 2021-06-11
WAHLAP TECH CO LTD
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Problems solved by technology
Since the capacitance value of the capacitor in the filter amplifier circuit will change with the change of the communication baud rate, the charging and discharging time of the capacitor will change with the change of the load, which will lead to a decrease in the accuracy of the bus current obtained by the host, thereby reducing the The correct rate of receiving data sent by the slave
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[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of this application.
[0039] The core of the present application is to provide a data transmission system, which is used to improve the correctness rate of the master receiving the data sent by the slave. The core of the present application is to provide a data transmission method, device and medium.
[0040] In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in con...
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The invention discloses a data transmission system, method and device and a medium, and the system comprises a slave, a sampling resistor on a bus loop, an analog-to-digital converter connected with the sampling resistor in parallel, and a host connected with the analog-to-digital converter and the slave computer, wherein the analog-to-digital converter is used to collect the voltage on the sampling resistor; an analog signal representing the current bus current is obtained through the voltage and the sampling resistor, and the analog signal is converted into a digital signal and then sent to the host, so that the host can determine a signal sent by the slave according to the digital signal. The analog-to-digital converter has extremely high input impedance, so that the data acquisition of the analog-to-digital converter is not influenced by the communication baud rate and the load change, and the accuracy of receiving the data sent by the slave by the host is improved. Besides, when the analog-to-digital converter converts the analog quantity into the digital quantity, tiny change of the analog quantity can be converted into large digital quantity change, so that the efficiency and the accuracy of receiving data sent by the slave by the host are improved.
Description
technical field [0001] The present application relates to the technical field of power electronics, in particular to a data transmission system, method, device and medium. Background technique [0002] M-Bus is an instrument bus that uses a pair of wires to transmit serial data. The bus system consists of a master and a series of slaves connected to the bus. The data transmission based on M-Bus is specifically, the master transmits signals to the slave: the master sends logic 0, the corresponding bus voltage is higher than 12V, the master sends logic 1, the corresponding bus voltage is not higher than 42V and is higher than the corresponding logic 0 If the bus voltage is higher than 10V, the slave can determine the received data by detecting the difference between the current bus voltage and the bus voltage corresponding to logic 0, that is, if the difference is not less than 10V, it means that the master sends logic 1, and the difference is less than 10V, then Indicates th...
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IPC IPC(8): H03M1/34
CPCH03M1/34
Inventor 程卫东赵强郭峰徐琦吴珏珺欧文举
Owner WAHLAP TECH CO LTD