Highway addressable remote transducer (HART) modulator-demodulator and data transmission method thereof
A modem, modulation and demodulation technology, applied in the direction of digital transmission system, transmission system, modulation carrier system, etc., can solve the problems of unsuitable PC, unfavorable HART intelligent equipment repair and maintenance, slow transmission speed, etc., to improve reliability , low cost, the effect of reducing the failure rate
Active Publication Date: 2013-04-24
重庆四联测控技术有限公司 +1
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[0003] In the process of realizing the present application, the inventor finds that there are at least the following problems in the prior art: the current HART modem usually adopts a serial communication interface, the transmission speed is slow, and it is not suitable for PCs in most cases, especially the application of notebook computers , It is not conducive to technical maintenance personnel to overhaul and maintain HART smart devices on site
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[0050] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0051] See figure 1 , shows a schematic structural diagram of a HART modem according to an embodiment of the present application, and the HART modem includes: a HART modulation and demodulation circuit 1, a USB (Universal Serial Bus, Universal Serial Bus) interface circuit 2, a microprocessor 3, a power supply Circuit 4, where:
[0052] T...
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The invention discloses a highway addressable remote transducer (HART) modulator-demodulator and a data transmission method thereof. The HART modulator-demodulator comprises a supply circuit, a microprocessor, an HART modulation demodulation circuit and a universal serial bus (USB) port circuit, and the HART modulator-demodulator is communicated with an upper computer through the USB port circuit. Therefore, the HART modulator-demodulator is communicated with a personal computer (PC) through a USB port, and the PC, in particular to a laptop can be used to conduct maintenance for an HART intelligent device on the scene. In addition, a processing flow of anti-interference processing technique is added to the data transmission method of the HART modulator-demodulator, and therefore reliability of the HART modulator-demodulator is improved, and the failure rate is reduced. A main chip of the HART modulator-demodulator is low in cost, and therefore the cost of the HART modulator-demodulator is low.
Description
technical field [0001] The present application relates to the field of modem technology, in particular to a HART modem and a data transmission method thereof. Background technique [0002] The HART modem is a configuration / debugging tool for smart instruments and devices (such as pressure transmitters, temperature transmitters, flow meters, actuators, etc.) based on the HART protocol, which can be used for production configuration, debugging and on-site management, maintenance, etc. [0003] In the process of realizing the present application, the inventor finds that there are at least the following problems in the prior art: the current HART modem usually adopts a serial communication interface, the transmission speed is slow, and it is not suitable for PCs in most cases, especially the application of notebook computers , It is not conducive to technical maintenance personnel to overhaul and maintain HART smart devices on site. Contents of the invention [0004] In orde...
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IPC IPC(8): H04L27/00
Inventor 梁伟成黄云彪刘君赵俊杰艾军
Owner 重庆四联测控技术有限公司