CN213481617U - Multifunctional wireless pressure transmitter - Google Patents
Multifunctional wireless pressure transmitter Download PDFInfo
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- CN213481617U CN213481617U CN202022760535.2U CN202022760535U CN213481617U CN 213481617 U CN213481617 U CN 213481617U CN 202022760535 U CN202022760535 U CN 202022760535U CN 213481617 U CN213481617 U CN 213481617U
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Abstract
The utility model provides a multi-functional wireless pressure transmitter, including power management circuit, central processing unit, NB-IoT wireless module, RS485 interface circuit, memory, clock chip, voltage comparator and sensor, wherein, power management circuit's output respectively with central processing unit, RS485 interface circuit, memory, clock chip and voltage comparator connect. The utility model has the advantages that: the probability of zero drift is reduced, long-distance communication can be realized, data can be transmitted wirelessly, and real-time data communication can be realized.
Description
Technical Field
The utility model relates to a pressure transmitter especially relates to a multi-functional wireless pressure transmitter.
Background
Although the current technology is mature, the following problems still exist according to the actual use condition for the existing pressure transmitter (pressure recorder) on the market:
1. using a 4-20mA analog signal pressure transmitter, there are disadvantages: the power consumption is large (24V power supply, 4-20mA working current); zero drift easily occurs in the measurement process, and calibration zero setting is required to be carried out regularly; the analog signal can be accessed to the automatic control SCADA system only by data conversion; the analog signal transmitter with stable performance and relatively high price (such as ROSMOUNT and the like);
2. pressure transmitters with RS485 communication interfaces have also appeared in recent years. However, such transmitters still have many limitations: the communication power consumption is also large, and the common power consumption of the conventional digital signal pressure transmitter is about 24V multiplied by 20 mA; once the external power supply is disconnected, the external power supply immediately enters a shutdown state; the signal communication is limited, and long-distance communication cannot be realized, because the maximum effective communication length of an RS485 interface is about 1200 meters; most digital signal pressure transmitters basically have no recording function, and cannot inquire historical measurement records of the pressure transmitters;
3. the conventional pressure recorder only has the function of recording timing pressure data. Without any real-time signal interface, and without wireless transmission function. Under the condition that measurement records need to be inquired, the data can be exported for analysis through the USB by opening the front cover;
4. based on NB-Iot technology, products such as remote pressure transmitters appear on the market in recent two years. However, the products also have certain limitations: on one hand, the data can only be automatically reported to a specified platform for display and analysis without a communication interface; on the other hand, the NB-Iot network does not support private network communication, only data can be reported to a specified cloud platform of an operator, and the pressure transmitter is not suitable for occasions needing the private network communication; the existing remote transmission pressure transmitter only has a battery power supply mode, and basically cannot achieve the function of data real-time communication in order to save electricity.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a multi-functional wireless pressure transmitter.
The utility model provides a multifunctional wireless pressure transmitter, which comprises a power management circuit, a central processing unit, an NB-IoT wireless module, an RS485 interface circuit, a memory, a clock chip, a voltage comparator and a sensor, wherein, the output end of the power management circuit is respectively connected with the central processing unit, the RS485 interface circuit, the memory, the clock chip and the voltage comparator, the central processing unit is bidirectionally connected with the input and output of the NB-IoT wireless module, wireless communication signals are transmitted between the central processing unit and the NB-IoT wireless module, the central processing unit is bidirectionally connected with the input and output of the RS485 interface circuit, acquisition signals are transmitted between the central processing unit and the RS485 interface circuit, the central processing unit is bidirectionally connected with the input and output of the memory, configuration information is transmitted between the central processing unit and the memory, the central processing unit is in bidirectional connection with the input and output of the clock chip, clock signals are transmitted between the central processing unit and the clock chip, the output end of the sensor is connected with the input end of the voltage comparator, the output end of the voltage comparator is connected with the central processing unit, the sensor outputs pressure original signals to the voltage comparator, and the voltage comparator outputs pressure electric signals to the central processing unit.
As a further improvement of the present invention, the voltage comparator is a 64-bit high-precision successive approximation voltage comparator.
As a further improvement, the output end of the central processing unit is connected with an LCD display screen, and the central processing unit outputs data display signals to the LCD display screen.
As a further improvement of the utility model, multifunctional wireless pressure transmitter still includes the button, the output of button with central processing unit connects, the button to central processing unit output key signal.
As a further improvement of the present invention, the multifunctional wireless pressure transmitter further comprises a battery, the output end of the battery is connected to the power management circuit.
As a further improvement of the present invention, the NB-IoT wireless module is connected with an NB-IoT SIM card.
As a further improvement of the present invention, the multifunctional wireless pressure transmitter further comprises an external power supply, an output of the external power supply is connected to the power management circuit.
The utility model has the advantages that: the probability of zero drift is reduced, long-distance communication can be realized, data can be transmitted wirelessly, and real-time data communication can be realized.
Drawings
Fig. 1 is a schematic block diagram of the multifunctional wireless pressure transmitter of the present invention.
Fig. 2 is a schematic structural diagram of the multifunctional wireless pressure transmitter of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and embodiments.
As shown in fig. 1 to fig. 2, a multifunctional wireless pressure transmitter includes a power management circuit 13, a central processing unit 6, an NB-IoT wireless module 2, an RS485 interface circuit 8, a memory 9, a clock chip 10, a voltage comparator and a sensor 12, wherein an output end of the power management circuit 13 is respectively connected to the central processing unit 6, the RS485 interface circuit 8, the memory 9, the clock chip 10 and the voltage comparator, the central processing unit 6 is bidirectionally connected to the NB-IoT wireless module 2, the central processing unit 6 transmits a wireless communication signal to the NB-IoT wireless module 2, the central processing unit 6 is bidirectionally connected to the RS485 interface circuit 8, the central processing unit 6 transmits a collection signal to the RS485 interface circuit 8, and the central processing unit 3 is bidirectionally connected to the memory 9, the central processing unit 6 and the memory 9 transmit configuration information, the central processing unit 6 is in input and output bidirectional connection with the clock chip 10, the central processing unit 6 transmits clock signals with the clock chip 10, the output end of the sensor 12 is connected with the input end of the voltage comparator, the output end of the voltage comparator is connected with the central processing unit 6, the sensor 12 outputs a pressure raw signal to the voltage comparator, and the voltage comparator outputs a pressure electric signal to the central processing unit 6.
The voltage comparator is preferably a 64-bit high-precision successive approximation voltage comparator 11.
The output end of the central processing unit 6 is connected with the LCD display screen 4, and the central processing unit 6 outputs data display signals to the LCD display screen 4.
The multifunctional wireless pressure transmitter further comprises a key 7, the output end of the key 7 is connected with the central processing unit 6, and the key 7 outputs a key signal to the central processing unit 9.
The multifunctional wireless pressure transmitter further comprises a battery 5, and the output end of the battery 5 is connected with the power management circuit 13.
The NB-IoT wireless module 2 is connected with an NB-IoT SIM card 3.
The multifunctional wireless pressure transmitter further comprises an external power supply 1, and the output end of the external power supply 1 is connected with the power management circuit 13.
The multifunctional wireless pressure transmitter is provided with an antenna 101, an integrated main control display circuit board 102, an explosion-proof shell 103 and a pressure measuring interface 104, and a sensor 12 is in butt joint with the pressure measuring interface 104.
The utility model provides a pair of multi-functional wireless pressure transmitter has following advantage:
1. there is substantially no zero drift. Even if zero drift occurs, the zero drift can be adjusted through a zero adjusting knob on the pressure transmitter body.
2. The power consumption is extremely low. Under the condition of external direct current power supply, the maximum power consumption of real-time communication is only 12mA, the power supply voltage range is wide, and 5-24V can be used. Under the condition that external direct current is disconnected, commercial power outage alarm information is immediately started and is automatically switched to an internal battery for power supply, static power consumption can be as low as 3.6V multiplied by 12uA, the maintenance workload of voltage transformer is greatly reduced, and the service life of a standby battery is as long as 2-3 months.
3. An RS485 communication interface is reserved. Because the NB-Iot network can not directly enter a private network, passive data acquisition can be carried out by adding a wireless gateway which is independently researched and developed by the owner through an RS485 communication interface.
4. An RS485 communication interface is reserved. The dual-redundancy mode of the upper computer is realized, data can be actively reported through an NB-Iot module, and real-time data can be passively collected through an RS485 communication interface.
5. The product is internally integrated with a large-capacity memory, and can store pressure record data for at least 7 days. The test record is obtained through the RS485 communication interface, and the pressure recorder has the function of the pressure recorder from the aspect.
6. The debugging is simple. The pressure transmitter body is provided with 4 keys, so that conventional parameter debugging can be realized, and a configuration instruction can be remotely issued through an upper platform for debugging.
7. The installation operation is simple. The product does not need a voltage variable metering part of a remote transmission module part which is relatively independent like a conventional pressure transmitter, has lower requirements on field installation environment and only needs to be connected with an external power supply. From this point of view, pressure transmitter data acquisition, which is the traditional mode, is far from comparable.
8. Basically, the data is internally processed by digital signals without frequent calibration, and the function of the metering part is relatively stable.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (7)
1. The utility model provides a multi-functional wireless pressure transmitter which characterized in that: the power supply management circuit comprises a power supply management circuit, a central processing unit, an NB-IoT wireless module, an RS485 interface circuit, a memory, a clock chip, a voltage comparator and a sensor, wherein the output end of the power supply management circuit is respectively connected with the central processing unit, the RS485 interface circuit, the memory, the clock chip and the voltage comparator, the central processing unit is bidirectionally connected with the input and the output of the NB-IoT wireless module, wireless communication signals are transmitted between the central processing unit and the NB-IoT wireless module, the central processing unit is bidirectionally connected with the input and the output of the RS485 interface circuit, acquisition signals are transmitted between the central processing unit and the RS485 interface circuit, the central processing unit is bidirectionally connected with the input and the output of the memory, and configuration information is transmitted between the central processing unit and the memory, the central processing unit is in bidirectional connection with the input and output of the clock chip, clock signals are transmitted between the central processing unit and the clock chip, the output end of the sensor is connected with the input end of the voltage comparator, the output end of the voltage comparator is connected with the central processing unit, the sensor outputs pressure original signals to the voltage comparator, and the voltage comparator outputs pressure electric signals to the central processing unit.
2. The multi-functional wireless pressure transmitter of claim 1, wherein: the voltage comparator is a 64-bit high-precision successive approximation type voltage comparator.
3. The multi-functional wireless pressure transmitter of claim 1, wherein: the output end of the central processing unit is connected with an LCD display screen, and the central processing unit outputs data display signals to the LCD display screen.
4. The multi-functional wireless pressure transmitter of claim 1, wherein: the multifunctional wireless pressure transmitter further comprises a key, wherein the output end of the key is connected with the central processing unit, and the key outputs a key signal to the central processing unit.
5. The multi-functional wireless pressure transmitter of claim 1, wherein: the multifunctional wireless pressure transmitter further comprises a battery, and the output end of the battery is connected with the power management circuit.
6. The multi-functional wireless pressure transmitter of claim 1, wherein: the NB-IoT wireless module is connected with an NB-IoT SIM card.
7. The multi-functional wireless pressure transmitter of claim 1, wherein: the multifunctional wireless pressure transmitter further comprises an external power supply, and the output end of the external power supply is connected with the power management circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022760535.2U CN213481617U (en) | 2020-11-25 | 2020-11-25 | Multifunctional wireless pressure transmitter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022760535.2U CN213481617U (en) | 2020-11-25 | 2020-11-25 | Multifunctional wireless pressure transmitter |
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| CN213481617U true CN213481617U (en) | 2021-06-18 |
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| CN202022760535.2U Active CN213481617U (en) | 2020-11-25 | 2020-11-25 | Multifunctional wireless pressure transmitter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834601A (en) * | 2021-11-29 | 2021-12-24 | 广州市美烨电子科技有限公司 | Pressure display transmitter and control method thereof |
| CN113916427A (en) * | 2021-09-18 | 2022-01-11 | 芜湖传方智能科技有限公司 | Pressure detection device based on NB-IoT technology |
-
2020
- 2020-11-25 CN CN202022760535.2U patent/CN213481617U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916427A (en) * | 2021-09-18 | 2022-01-11 | 芜湖传方智能科技有限公司 | Pressure detection device based on NB-IoT technology |
| CN113834601A (en) * | 2021-11-29 | 2021-12-24 | 广州市美烨电子科技有限公司 | Pressure display transmitter and control method thereof |
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