Two-wire flowmeter transmitter, flowmeter and flowmeter system
A flowmeter and transmitter technology, applied in the field of two-wire system, can solve the problems of high cable cost, relatively high operating environment requirements, power consumption limitation of flowmeter transmitter, etc., so as to save cable cost and expand application The environment, the effect of improving the power consumption
Active Publication Date: 2017-09-19
艾默生过程控制流量技术有限公司
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Problems solved by technology
The power supply and signal transmission of the four-wire flowmeter transmitter require two cables respectively, which will cause the user's cable cost to be too high when using the flowmeter transmitter
Restricted by the Hart communication protocol itself, the current amplitude on the communication circuit of the flowmeter transmitter is limited to 4 ~ 20mA
In addition, the power supply used by Hart communication is usually a 12-42V DC power supply. This greatly limits the power consumption of the flowmeter transmitter
This limitation makes the two-wire flowmeter transmitter limited to low-power operation, and cannot fully exert the functions of the sensor and the flowmeter transmitter, resulting in a waste of flowmeter transmitter performance
Such a limitation of power consumption makes the two-wire flowmeter transmitter can only be applied in a small size, and has relatively high requirements for the operating environment
Method used
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[0019] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.
[0020] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the ...
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Disclosed are a two-wire flowmeter transmitter, flowmeter and flowmeter system powered by AC. The two-wire flowmeter transmitter includes: a processor; a power supply receiving unit, which receives the AC power provided by the AC power supply cable as the working power supply of the flowmeter transmitter; and a carrier communication unit, which is used for controlling or monitoring according to The communication signal transmitted from the control terminal of the flowmeter transmitter provides the sensor signal to be transmitted from the flowmeter to the control terminal, wherein the carrier communication unit receives the communication signal through the AC power supply cable, and provides the sensor signal to the control terminal through the AC power supply cable. the control terminal.
Description
technical field [0001] The present disclosure relates to a two-wire solution for flow meters. More particularly, it relates to an AC powered two-wire flowmeter transmitter and flowmeters and flowmeter systems including the same. Background technique [0002] In the field of flowmeter transmitter design, previous flowmeter transmitters usually adopt a four-wire design. The power supply and signal transmission of the four-wire flowmeter transmitter require two cables each, which will cause the user's cable cost to be too high when using the flowmeter transmitter. In order to solve this problem, a two-wire flowmeter transmitter using two signal wires to transmit signals to the flowmeter transmitter and use these two signal wires to supply power to the flowmeter transmitter is proposed. [0003] However, existing two-wire flowmeter transmitters are based on Hart communication. Restricted by the Hart communication protocol itself, the current amplitude on the communication cir...
Claims
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IPC IPC(8): G01F15/00
Inventor 潘磊
Owner 艾默生过程控制流量技术有限公司