CN116907581A

CN116907581A - Dual-output transmitter

Info

Publication number: CN116907581A
Application number: CN202310875199.1A
Authority: CN
Inventors: 翟小卫; 谭蓓; 崔韧清; 李墀; 唐少辉; 姚姣; 樊玮玮
Original assignee: Baoji Xingyuteng Measurement And Control Equipment Co ltd
Current assignee: Baoji Xingyuteng Measurement And Control Equipment Co ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2023-10-20

Abstract

The application discloses a dual-output transmitter, which belongs to the field of electronic circuits and comprises a pressure temperature sensor, a display module, a key module, an MCU controller, a power supply module, a wireless transmission module and a signal processing module, wherein the display module and the key module are electrically connected with the MCU controller, the pressure temperature sensor is electrically connected with the MCU controller, the wireless transmission module is electrically connected with the MCU controller, and a signal output port of the MCU controller is electrically connected with a signal receiving port of the signal processing module.

Description

Dual-output transmitter

Technical Field

The application belongs to the technical field of transmitters, and particularly relates to a double-output transmitter.

Background

Among the types of meters, transmitters are most widely used and commonly divided into pressure transmitters and differential pressure transmitters. Transmitters are commonly used to measure pressure, differential pressure, vacuum, liquid level, flow, density, and the like.

The existing transmitter usually converts a large alternating current/direct current signal into a 4-20mA standard signal form and provides the signal form for a computer or a display instrument or a PLC to control, and the transmitter usually adopts a wired two-wire system 4-20mA transmission output, and requires complicated network wiring and subsequent maintenance on hardware.

Disclosure of Invention

The application aims to provide a double-output transmitter. The combination of the pressure and temperature sensor, the signal processing circuit, the wireless communication module, the power module, the battery and the antenna is adopted, so that the technical problems of complicated network wiring and subsequent maintenance on hardware in the prior art are solved.

In order to achieve the above purpose, the present application provides the following technical solutions:

a dual output transmitter, comprising: the device comprises a pressure temperature sensor, a display module, a key module, an MCU controller, a power supply module, a wireless transmission module and a signal processing module, wherein the display module and the key module are electrically connected to the MCU controller, the pressure temperature sensor is electrically connected with the MCU controller, the wireless transmission module is electrically connected with the MCU controller, and a signal output port of the MCU controller is electrically connected with a signal receiving port of the signal processing module.

As a preferable scheme of the application, the MCU is used for judging power modes, the two power modes are respectively battery power supply and external power supply 24V power supply, the power supply module is connected with the battery and the external power supply simultaneously, the working mode of the dual-output transmitter is two-wire system 4-20mA output, and the working mode of the dual-output transmitter is wireless communication mode after the power supply module is connected with the battery independently.

As a preferable scheme of the application, the display module adopts LCD liquid crystal display, the display module is used for displaying output current corresponding to the interface pressure value, and the pressure and temperature sensor is used for completing the measurement of pressure data such as oil pressure, sleeve pressure, back pressure, trunk pressure and the like.

As a preferable scheme of the application, the power supply module adopts a power supply circuit consisting of a linear voltage stabilizer LM317L to convert the 24V voltage of an external power supply into 5V, and then converts the 5V voltage into 3.3V through LDO to supply power for the MCU controller and the display module.

As a preferable scheme of the application, the 5V voltage output by the power supply module also provides voltage for the MCU controller to output PWM signals, and the voltage is used for converting the pressure value acquired by the pressure temperature sensor into the PWM signals.

As a preferable scheme of the application, the signal processing module amplifies and outputs the PWM signal through the operational amplifier LMV358, and the PWM signal output by the MCU controller is a square wave.

As a preferable scheme of the application, the power supply module is provided with two ports, namely a battery power supply end and an external power supply end, 3.3V output by an LDO (low dropout regulator) is adopted by the battery power supply end to supply power for the MCU controller and each module circuit, the MCU controller can process power supply mode switching, and in a two-wire system 4-20mA output mode, the MCU controller preferentially processes the external power supply and then processes the battery mode, and the MCU controller enables the battery power supply module to be powered off through a switch circuit so as to enable the battery power supply module to be in a closed state.

Compared with the prior art, the application has the beneficial effects that:

the transmitter supports wireless communication mode and wired two-wire system 4-20mA transmitting output in power supply design, adopts the wireless communication mode to operate through low-power consumption battery power management and wireless communication protocol ad hoc network, does not need network wiring compared with the wired mode, is energy-saving and environment-friendly, reduces maintenance in hardware, and can update and upgrade wireless data on site through a wireless transmission module, thereby being convenient and quick.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, serve to explain the application. In the drawings:

FIG. 1 is a circuit diagram of a transmitter module of the present application;

FIG. 2 is a block diagram of a two-wire 4-20mA output mode of the transmitter of the present application;

FIG. 3 is a block diagram of a battery powered mode of the transmitter of the present application;

FIG. 4 is a circuit diagram of a power module of a transmitter of the present application;

FIG. 5 is a circuit diagram of a signal processing module of a transmitter of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is apparent that the described embodiments are only some embodiments of the present application, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the protection scope of the present application.

Examples

Referring to fig. 1-3, the present application provides the following technical solutions:

the dual-output transmitter comprises a pressure temperature sensor, a display module, a key module, an MCU controller, a power supply module, a wireless transmission module and a signal processing module, wherein the display module and the key module are electrically connected to the MCU controller, the pressure temperature sensor is electrically connected with the MCU controller, the wireless transmission module is electrically connected with the MCU controller, and a signal output port of the MCU controller is electrically connected with a signal receiving port of the signal processing module.

Specifically, the dual-output transmitter supports wireless communication mode and wired two-wire system 4-20mA transmitting output, the dual output can be customized according to the requirements of customers, and the MCU controller can judge the power supply mode by the power supply mode of the power supply module, and the power supply mode is divided into two modes, namely battery power supply and 24V power supply of an external power supply. The double-output transmitter is connected with the battery and an external power supply at the same time when working normally, the working mode is a wired two-wire system 4-20mA output mode, the double-output transmitter is connected with the battery, and the working mode is a wireless communication mode.

Specifically, the two-wire system outputs 4-20mA, integrates high-sensitivity pressure, high-precision signal processing module, low-power consumption battery power management and wireless communication, and a rich display module displays an interface. The output of the two-wire system is 4-20mA, the external power supply 24V is connected with an ammeter and is connected to a power terminal of the product, and the display module displays the output current corresponding to the interface pressure value.

Specifically, the wireless communication mode adopts low-power consumption battery power management and wireless communication protocol ad hoc network operation to realize real-time communication of data and analysis, and is responsible for receiving a measurement and control host machine instruction and completing measurement and transmission of pressure data such as oil pressure, casing pressure, back pressure and trunk pressure. The wireless transmission power consumption is low, network wiring is not needed, the energy is saved, the environment is protected, maintenance in terms of hardware is reduced, and wireless data updating and upgrading can be carried out on site through the wireless transmission module, so that the wireless data transmission system is convenient and quick.

In the embodiment of the application, from the aspect of a power supply module, an external 24V power supply converts an input 24V voltage into 5V through a linear voltage stabilizer LM317L, the output 5V voltage is converted into 3.3V through an LDO (low dropout regulator), the 5V power supply supplies power to circuits of an MCU (micro controller unit) controller and a display module, the 5V power supply also provides voltage for the MCU controller to output PWM (pulse Width modulation) signals, the voltage values acquired by a pressure temperature sensor are converted into PWM signals, and the PWM signals amplify the output current by 4-20mA through an LMV 358. It should be noted that the MCU outputs PWM signals as square waves, and the square wave modulation has strong anti-interference performance.

In the embodiment of the application, 3.3V output by the LDO is used for supplying power to the MCU controller and each module circuit by the battery, wireless communication is adopted for battery power supply, low-power consumption battery power management and wireless communication protocol ad hoc network operation are adopted for wireless communication, real-time communication of data and analysis is realized, and the wireless communication module and an intelligent wireless receiving terminal can form a pressure acquisition system.

The working process of the double-output transmitter comprises the following steps:

the product is connected with an external power supply and a battery, the MCU controller judges the power supply mode, if the power supply is 24V, the MCU controller judges and processes the closing of the battery mode, and the battery module is powered off through the switch circuit, so that the battery module is in a closed state. If the MCU controller judges that the external power supply supplies power, the MCU controller outputs a 4-20mA calibration mark to read a pressure value and output a corresponding PWM signal, the key module carries out fine adjustment on the output current, other functions of the equipment are not restarted, and different interfaces can be switched by pressing keys. If the power is supplied to the battery, the MCU controller judges and processes the external power mode to be closed, the MCU controller wakes up the wireless transmission module, and the wireless transmission module starts to work and sends and receives uploading periodic transmission data through the antenna. And pressing the key module according to the acquisition flow, refreshing a screen new identifier by a display screen of the display module, and enabling the equipment to enter low power consumption after acquisition is completed, so as to realize low power consumption battery power management. And periodically uploading the acquired data to a network center. The transmitter is a wireless pressure transmitter, and can transmit pressure signals of the whole time process in real time. Meanwhile, the monitoring center can set control, parameter and other information through a wireless network, and pressure signals of the wireless pressure transmitter are transmitted through the wireless network.

Finally, it should be noted that: the above is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that the present application is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dual output transmitter, comprising: the device comprises a pressure temperature sensor, a display module, a key module, an MCU controller, a power supply module, a wireless transmission module and a signal processing module, wherein the display module and the key module are electrically connected to the MCU controller, the pressure temperature sensor is electrically connected with the MCU controller, the wireless transmission module is electrically connected with the MCU controller, and a signal output port of the MCU controller is electrically connected with a signal receiving port of the signal processing module.

2. The dual-output transmitter of claim 1, wherein the MCU is configured to determine two power modes, the two power modes are respectively battery powered and 24V powered by an external power source, the power module is configured to connect the battery and the external power source simultaneously, the working mode of the dual-output transmitter is a two-wire system 4-20mA output, and the working mode of the dual-output transmitter is a wireless communication mode after the power module is configured to connect the battery individually.

3. The dual-output transmitter of claim 2, wherein the display module is configured to display the output current corresponding to the interface pressure value by using LCD liquid crystal, and the pressure-temperature sensor is configured to measure the oil pressure, the jacket pressure, the back pressure, the trunk pressure, etc.

4. A dual output transmitter according to claim 3, wherein the power supply module employs a power circuit comprised of a linear regulator LM317L to convert the 24V voltage of the external power supply to 5V, which is then converted to 3.3V by LDO to power the MCU controller and the display module.

5. The dual output transmitter of claim 4, wherein the 5V voltage output by the power module further provides a voltage for the MCU controller to output a PWM signal for converting the pressure value acquired by the pressure temperature sensor into the PWM signal.

6. The dual output transmitter of claim 5, wherein the signal processing module amplifies the PWM signal to output via an operational amplifier LMV358, and wherein the PWM signal output by the MCU controller is a square wave.

7. The dual output transmitter of claim 6, wherein the power module has two ports, a battery power supply terminal and an external power supply terminal, the battery power supply terminal uses 3.3V output by the LDO to supply power to the MCU controller and each module circuit, the MCU controller further handles the shutdown of the battery mode, and the battery power supply module is powered off by the switch circuit to be in a shutdown state.