CN220542152U - Bluetooth ultrasonic water meter with MBUS single communication - Google Patents
Bluetooth ultrasonic water meter with MBUS single communication Download PDFInfo
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- CN220542152U CN220542152U CN202321700097.8U CN202321700097U CN220542152U CN 220542152 U CN220542152 U CN 220542152U CN 202321700097 U CN202321700097 U CN 202321700097U CN 220542152 U CN220542152 U CN 220542152U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000002955 isolation Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model relates to a Bluetooth ultrasonic water meter with MBUS single communication, which comprises a battery power supply module, an ultrasonic metering circuit, a Bluetooth SOC, an MBUS transmitting circuit, an MBUS receiving circuit and an MBUS bus, and further comprises a debugging port, a valve control circuit, a liquid crystal display circuit and an infrared communication circuit. According to the Bluetooth ultrasonic water meter with MBUS single communication, the MBUS bus is changed into the Bluetooth ultrasonic water meter which is only used for communication power supply and is not used for supplying power to the chip, and the battery in the power supply module of the ultrasonic water meter egg is used for supplying power to the chip, so that the current consumption of the MBUS bus in each sub-table is reduced, and the total number of sub-tables which can be loaded under the MBUS bus of one main table is increased.
Description
Technical Field
The utility model relates to the technical field of intelligent water meters, in particular to a Bluetooth ultrasonic water meter with MBUS single communication.
Background
The current water meter product is generally configured in a form of a primary-secondary water meter, wherein the primary-secondary water meter is a common water meter layout mode and consists of a main meter and a sub-meter, and the sub-meter is an auxiliary part in the primary-secondary water meter and is usually matched with the main meter for use and is arranged on a branching line behind the main meter. The sub-table is typically smaller, with a smaller measurement range and lower flow accuracy. It is mainly used for measuring and recording smaller flows on subsequent branches of a main meter, such as water usage of residences, small business units and individual users. The main table is used for counting metering data of sub-tables, and hundreds of sub-tables are often linked behind one main table because the cell size is larger and a pipeline system is complex.
MBUS communication is a novel bus structure, and the main characteristic of MBUS is that serial data is simultaneously supplied and transmitted through two nonpolar transmission lines, and each sub-table is connected in parallel on the MBUS bus. The MBUS bus supplies power for chip operation and data transmission at the same time, and therefore, the power load of the MBUS bus of one sub-table comprises two parts, namely, chip operation power supply and data transmission power supply. The chip operation power supply increases the current quantity when the sub-table and the main table carry out data transmission, and the total load current which can be carried by one main table is limited, which is equivalent to phase change and reduces the maximum number of load sub-tables under the main table.
Disclosure of Invention
The utility model aims to solve the technical problems that: the utility model provides a Bluetooth ultrasonic water meter with single communication of MBUS, which aims to solve the technical problems, and reduces the maximum number of load sub-tables under a main table and is not beneficial to large-scale installation and capacity expansion of a primary table. The technical scheme is as follows: a bluetooth ultrasonic water meter for MBUS single communication, comprising:
the device comprises a battery power supply module, an ultrasonic metering circuit, a Bluetooth SOC, an MBUS transmitting circuit, an MBUS receiving circuit and an MBUS bus;
the battery power supply module is electrically connected with the Bluetooth SOC, the Bluetooth SOC is in communication connection with the ultrasonic metering circuit, the MBUS sending circuit and the MBUS receiving circuit, and the MBUS sending circuit and the MBUS receiving circuit are also in communication connection with the MBUS bus.
As a preferred embodiment, the MBUS receiving circuit includes an MBUS bus communication power supply terminal, an MBUS bus communication signal output terminal, a battery power supply input terminal, a reference voltage input terminal, an isolation diode, a filter capacitor, a first receiving triode, a second receiving triode and a voltage dividing resistor;
the MBUS bus communication power supply end is electrically connected with the reference voltage input end through an isolation diode, and the reference voltage input end is electrically connected with the filter capacitor;
the base electrode of the first receiving triode is electrically connected with the MBUS bus communication power supply end, the emitter electrode of the first receiving triode is electrically connected with the reference voltage input end, and meanwhile, the base electrode, the emitter electrode and the receiving electrode of the first receiving triode are electrically connected with the emitter electrode and the base electrode of the second receiving triode;
and a receiving electrode of the second receiving triode is electrically connected with the battery power supply input end and the MBUS bus communication signal output end.
As a preferred embodiment, the MBUS transmitting circuit includes an MBUS bus communication power supply terminal, an MBUS bus communication input terminal TXD, a battery power supply input terminal, a first transmitting triode, a second transmitting triode, a voltage dividing resistor and a voltage stabilizing diode;
the base electrode of the first transmitting triode is electrically connected with the MBUS bus communication input end TXD, the emitter electrode of the first transmitting triode is electrically connected with the battery power supply input end, and the receiving electrode of the first transmitting triode is electrically connected with the zener diode, the base electrode of the second transmitting triode, the emitter electrode of the second transmitting triode and the grounding end;
and the collector electrode of the second transmitting triode is electrically connected with the MBUS bus communication power supply end.
As a preferred embodiment, the zener diode has a voltage drop of 0.6V.
As a preferred embodiment, the bluetooth SOC is a CH582M chip.
As a preferred embodiment, the battery powered module includes a main battery interface and a backup battery interface.
As a further preferred embodiment, an isolation diode is provided between the main battery interface and the backup battery interface.
As a preferred embodiment, the bluetooth ultrasonic water meter with the MBUS single communication further comprises an infrared communication module, and the infrared communication module is in communication connection with the bluetooth SOC.
The beneficial technical effects of the utility model include: according to the Bluetooth ultrasonic water meter with single MBUS communication, the characteristic that batteries are generally arranged for power supply is utilized, the MBUS bus is changed into the communication power supply without power supply to the chip, and the batteries in the power supply module of the ultrasonic water meter egg are used for power supply to the chip, so that the current consumption of the MBUS bus in each sub-table is reduced, and the total number of sub-tables which can be loaded under the MBUS bus of one main table is improved.
Other features and advantages of the present utility model will be disclosed in the following detailed description of the utility model and the accompanying drawings.
Drawings
The utility model is further described with reference to the accompanying drawings:
FIG. 1 is a block diagram of an MBUS single communication Bluetooth ultrasonic water meter according to an embodiment of the present utility model;
fig. 2 is a schematic circuit connection diagram of a power supply circuit of an MBUS single-communication bluetooth ultrasonic water meter according to an embodiment of the utility model;
fig. 3 is a schematic circuit connection diagram of an MBUS receiving circuit of an MBUS single-communication bluetooth ultrasonic water meter according to an embodiment of the utility model;
fig. 4 is a schematic circuit connection diagram of an MBUS transmitting circuit of an MBUS single-communication bluetooth ultrasonic water meter according to an embodiment of the utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.
In the following description, directional or positional relationships such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are presented for convenience in describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
The application provides a bluetooth ultrasonic water meter of MBUS single communication, its structure schematic diagram is as shown in FIG. 1, includes:
the device comprises a battery power supply module, an ultrasonic metering circuit, a Bluetooth SOC, an MBUS transmitting circuit, an MBUS receiving circuit and an MBUS bus, and further comprises a debugging port, a valve control circuit, a liquid crystal display circuit and an infrared communication circuit.
In the circuit, the battery power supply module is electrically connected with the Bluetooth SOC, the MBUS transmitting circuit and the MBUS receiving circuit to supply power for the Bluetooth SOC, and simultaneously supplies power for the MBUS transmitting circuit and the MBUS receiving circuit. The Bluetooth SOC is in communication connection with the ultrasonic metering circuit, the MBUS transmitting circuit and the MBUS receiving circuit, and the MBUS transmitting circuit and the MBUS receiving circuit are also in communication connection with the MBUS bus.
In the circuit, only communication connection exists between the MBUS transmitting circuit and the MBUS receiving circuit and between the MBUS bus and the Bluetooth SOC, and the current required by data transmission and receiving is acquired from the power supply module through the electric connection of the power supply module.
The embodiment of the application provides a specific implementation of the power supply circuit, and a circuit connection schematic diagram of the power supply circuit is shown in fig. 2, in the circuit, J4 and J6 are battery interfaces, and D1 and D2 are isolation diodes for preventing 2 batteries from being charged mutually. Wherein D1 selects silicon diodes with a conduction voltage drop of 0.6V, and D2 selects germanium diodes with a conduction voltage drop of 0.3V. C21 C22 and C33 are filter capacitors. VDD is used to power the bluetooth SOC and vcc_m is used to power the infrared communication circuit, the liquid crystal display circuit, and the valve control circuit.
When in use, J4 is connected with a lithium battery with the model ER14250, and J6 is connected with a lithium battery with the model ER 26500. J6 is a main battery interface, and J4 is a backup battery interface. When 2 batteries are simultaneously connected, the actual VDD voltage is supplied by the battery connected to J6 due to the difference in conduction voltage drop between D1 and D2. When the J6 battery voltage is below 3.3V or the battery is unplugged, the VDD voltage is supplied by the J4-on battery.
The embodiment of the application further provides a specific implementation of the MBUS receiving circuit, and a schematic circuit connection diagram of the MBUS receiving circuit is shown in fig. 3, where the implementation includes an MBUS bus communication power supply terminal VIN, an MBUS bus communication signal output terminal RXD, a battery power supply input terminal VCC, a reference voltage input terminal vcc_ext, an isolation diode D10, a filter capacitor C6, a first receiving triode Q2, a second receiving triode Q9, and voltage dividing resistors R9, R14, R20, R21, R22, R23, and R34.
In the ports and the elements, the MBUS bus communication power supply end VIN and the reference voltage input end VCC_EXT are electrically connected through an isolation diode, and the reference voltage input end VCC_EXT is electrically connected with the filter capacitor C6;
the base electrode of the first receiving triode Q2 is electrically connected with the MBUS bus communication power supply end VIN, the emitter electrode of the first receiving triode Q2 is electrically connected with the reference voltage input end VCC_EXT, and meanwhile, the base electrode, the emitter electrode and the receiving electrode of the first receiving triode Q2 are electrically connected with the emitter electrode and the base electrode of the second receiving triode Q9;
the receiving electrode of the second receiving triode Q9 is electrically connected with the battery power supply input ends VCC and MBUS bus communication signal output ends RXD.
The pair of voltage dividing resistors R9, R14, R20, R21, R22, R23 and R34 reduces the circuit voltage from 30V of MBUS to 3.6V of the Bluetooth SOC chip through voltage division.
When the level of the MBUS bus communication power supply terminal VIN decreases, the filter capacitor C6 maintains the voltage value of the reference voltage input terminal vcc_ext, so that the MBUS bus communication power supply terminal VIN and the reference voltage input terminal vcc_ext generate a level difference.
In the circuit, D10 is used to isolate VIN from vcc_ext, and C6 to maintain vcc_ext voltage for a short time, and the reverse leakage current of the D6 transient diode can turn on Q2. When there is data transmission on the MBUS bus, VIN suddenly decreases, and because of the characteristic of maintaining the voltage of C6, VCC maintains the original level, and a level difference is generated between VIN and VCC, so that Q2 is turned on, so that Q9 is turned on, RXD is set to a low level, so that RXD transmits the data transmitted by the MBUS bus to the bluetooth SOC.
The embodiment of the present application further provides a specific implementation of the foregoing MBUS transmission circuit, and a schematic circuit connection diagram of the implementation is shown in fig. 4, where the MBUS transmission circuit includes an MBUS bus communication power supply terminal VIN, an MBUS bus communication signal input terminal TXD, a battery power supply input terminal VCC, a first transmission triode Q1, a second transmission triode Q8, and voltage dividing resistors R4, R11, R12, R35, and zener diodes D7, D11.
The base of the first transmitting triode Q1 is electrically connected with the MBUS bus communication signal input end TXD, the emitter of the first transmitting triode Q1 is electrically connected with the battery power supply input end VCC, and the receiving electrode of the first transmitting triode Q1 is electrically connected with the voltage stabilizing diodes D7 and D11, the base of the second transmitting triode Q8, the emitter of the second transmitting triode Q8 and the grounding end.
The collector of the second transmitting triode Q8 is electrically connected with the MBUS bus communication power supply terminal VIN.
The TXD is connected to a serial port transmitting pin of the Bluetooth SOC, when data are transmitted, the TXD generates a low level, Q1 is conducted, VCC discharges to the ground through R4, D7 and D11 are silicon diodes, the single-tube voltage drop is 0.6V, the voltage of a base electrode of Q8 is stabilized at 1.2V, Q8 is conducted, R35 is a current limiting resistor, R35 is a constant current limiting resistor, and VIN discharges to the ground to be a constant current value, so that stable communication current is generated.
Preferably, in the MBUS transmitting circuit, the voltage drops of the zener diodes D7 and D11 are both 0.6V.
In a preferred embodiment of the present application, the bluetooth SOC selects a CH582M chip with a bluetooth communication function, and can be conveniently connected to a smart phone for meter reading without adding an additional bluetooth communication module, without developing additional meter reading equipment.
According to the Bluetooth ultrasonic water meter with single MBUS communication, the characteristic that batteries are generally arranged for power supply is utilized, the MBUS bus is changed into the communication power supply without power supply to the chip, and the batteries in the power supply module of the ultrasonic water meter egg are used for power supply to the chip, so that the current consumption of the MBUS bus in each sub-table is reduced, and the total number of sub-tables which can be loaded under the MBUS bus of one main table is improved.
While the utility model has been described in terms of embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.
Claims (8)
1. An MBUS single communication bluetooth ultrasonic water meter, comprising:
the device comprises a battery power supply module, an ultrasonic metering circuit, a Bluetooth SOC, an MBUS transmitting circuit, an MBUS receiving circuit and an MBUS bus;
the battery power supply module is electrically connected with the Bluetooth SOC, the MBUS sending circuit and the MBUS receiving circuit, the Bluetooth SOC is in communication connection with the ultrasonic metering circuit, the MBUS sending circuit and the MBUS receiving circuit, and the MBUS sending circuit and the MBUS receiving circuit are also in communication connection with the MBUS bus.
2. The bluetooth ultrasonic water meter of single communication of MBUS according to claim 1, wherein the MBUS receiving circuit comprises an MBUS bus communication power supply, an MBUS bus communication signal output, a battery power supply input, a reference voltage input, an isolation diode, a filter capacitor, a first receiving triode, a second receiving triode and a divider resistor;
the MBUS bus communication power supply end is electrically connected with the reference voltage input end through an isolation diode, and the reference voltage input end is electrically connected with the filter capacitor;
the base electrode of the first receiving triode is electrically connected with the MBUS bus communication power supply end, the emitter electrode of the first receiving triode is electrically connected with the reference voltage input end, and meanwhile, the base electrode, the emitter electrode and the receiving electrode of the first receiving triode are electrically connected with the emitter electrode and the base electrode of the second receiving triode;
and a receiving electrode of the second receiving triode is electrically connected with the battery power supply input end and the MBUS bus communication signal output end.
3. The bluetooth ultrasonic water meter of single communication of MBUS according to claim 1, wherein the MBUS transmitting circuit comprises an MBUS bus communication power supply terminal, an MBUS bus communication signal output terminal, a battery power supply input terminal, a first transmitting triode, a second transmitting triode, a voltage dividing resistor and a voltage stabilizing diode;
the base electrode of the first transmitting triode is electrically connected with the MBUS bus communication signal output end, the emitter electrode of the first transmitting triode is electrically connected with the battery power supply input end, and the receiving electrode of the first transmitting triode is electrically connected with the zener diode, the base electrode of the second transmitting triode, the emitter electrode of the second transmitting triode and the grounding end;
and the collector electrode of the second transmitting triode is electrically connected with the MBUS bus communication power supply end.
4. A bluetooth ultrasonic water meter with single communication according to claim 3, wherein the zener diode has a voltage drop of 0.6V.
5. The bluetooth ultrasonic water meter of MBUS single communication according to claim 1, wherein the bluetooth SOC is a CH582M chip.
6. The bluetooth ultrasonic water meter of single communication with MBUS according to claim 1, wherein the battery powered module includes a main battery interface and a backup battery interface.
7. The bluetooth ultrasonic water meter for single communication according to claim 6, wherein an isolation diode is provided between said main battery interface and said backup battery interface.
8. The bluetooth ultrasonic meter of MBUS single communication according to claim 1, characterized in that it further comprises an infrared communication module, said infrared communication module being in communication connection with said bluetooth SOC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321700097.8U CN220542152U (en) | 2023-06-30 | 2023-06-30 | Bluetooth ultrasonic water meter with MBUS single communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321700097.8U CN220542152U (en) | 2023-06-30 | 2023-06-30 | Bluetooth ultrasonic water meter with MBUS single communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220542152U true CN220542152U (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321700097.8U Active CN220542152U (en) | 2023-06-30 | 2023-06-30 | Bluetooth ultrasonic water meter with MBUS single communication |
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| Country | Link |
|---|---|
| CN (1) | CN220542152U (en) |
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2023
- 2023-06-30 CN CN202321700097.8U patent/CN220542152U/en active Active
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