阅读说明：本技术 一种tc-bus电子远传水表电路 (TC-BUS electronic remote water meter circuit ) 是由 范建华 张公森 陈维广 刘永广 徐军然 石潇龙 刘金亮 窦克森 朱文亚 韩凯 于 于 2021-01-12 设计创作，主要内容包括：本发明公开了一种TC-BUS电子远传水表电路,包括TC-BUS通讯电路、MCU主控电路、DC-DC降压电路、LDO降压电路、BLE蓝牙电路、水表阀控电路、水表计量电路、电池供电电路。TC-BUS通讯电路从接入的TC-BUS总线取电经过DC-DC降压电路、LDO降压电路降压为水表系统供电,并使TC-BUS转为TTL通讯方式与MCU主控电路通讯；MCU主控电路通过水表阀控电路、水表计量电路采集水表基表传感器信号与控制阀门,并且与BLE蓝牙电路通讯配置MCU的相关参数。进而实现电子远传水表采用TC-BUS总线通讯以及蓝牙本地调试,从而实现水表集抄的更高节点供电能力,提高水表在远距离传输下数据可靠性,方便水表表计的现场人员安装调试以及用户及时查询表计用水信息。(The invention discloses a TC-BUS electronic remote water meter circuit which comprises a TC-BUS communication circuit, an MCU master control circuit, a DC-DC voltage reduction circuit, an LDO voltage reduction circuit, a BLE Bluetooth circuit, a water meter valve control circuit, a water meter metering circuit and a battery power supply circuit. The TC-BUS communication circuit gets power from the accessed TC-BUS, and the power is supplied to a water meter system through the DC-DC voltage reduction circuit and the LDO voltage reduction circuit, and the TC-BUS is converted into a TTL communication mode to be communicated with the MCU main control circuit; the MCU master control circuit acquires signals of a water meter base meter sensor and a control valve through the water meter valve control circuit and the water meter metering circuit, and configures related parameters of the MCU through communication with the BLE Bluetooth circuit. And then the electronic remote water meter adopts TC-BUS BUS communication and Bluetooth local debugging, thereby realizing higher node power supply capacity of water meter centralized reading, improving data reliability of the water meter under remote transmission, and facilitating field personnel installation and debugging of the water meter and users to inquire water consumption information of the meter in time.)

1. The utility model provides a TC-BUS electron teletransmission water gauge circuit, its characterized in that, includes TC-BUS communication circuit, MCU master control circuit, DC-DC step-down circuit, LDO step-down circuit, BLE bluetooth circuit, water gauge valve accuse circuit, water gauge measuring circuit and battery supply circuit, wherein:

the TC-BUS communication circuit is used for obtaining electricity from the external collector to supply power to the TC-BUS water meter, realizing communication between the TC-BUS water meter and the external collector, and converting the TC-BUS into a TTL serial port to be communicated with the MCU main control circuit;

the MCU main control circuit is used for analyzing signals acquired by the water meter metering circuit, operating the water meter valve control circuit to drive the base meter valve, monitoring the power supply state of the TC-BUS, reporting abnormal operation information, controlling the operation state of the DC-DC voltage reduction circuit, and configuring related parameters of the MCU through communication with the BLE Bluetooth circuit;

the DC-DC voltage reduction circuit is used for reducing the voltage of the power supply of the TC-BUS communication circuit and supplying power to the water meter valve control circuit;

the LDO voltage reduction circuit is used for obtaining the voltage reduction of the power supply voltage of the TC-BUS communication circuit and supplying power to the TC-BUS water meter main control circuit and the BLE Bluetooth circuit;

the BLE Bluetooth circuit is used for maintaining and upgrading the local information of the water meter, and communicating with the Bluetooth terminal equipment to configure parameters such as TC-BUS water meter metering, valve control and the like;

the water meter valve control circuit is used for taking electricity from the TC-BUS through the DC-DC voltage reduction circuit to drive the base meter actuator to open and close a water meter valve without using a battery power supply or a LDO voltage reduction circuit power supply;

the water meter metering circuit is used for collecting a pulse signal from a water meter base meter sensor;

the battery power supply circuit is isolated from a power supply of the LDO step-down circuit which gets electricity from the TC-BUS through a diode VD3, and when the TC-BUS supplies power to the water meter, the battery power supply circuit does not supply power to the MCU main control circuit, the BLE Bluetooth circuit and the water meter metering circuit;

the TC-BUS communication circuit is connected with the DC-DC voltage reduction circuit and the LDO voltage reduction circuit, and is connected with the MUC main control circuit through a TTL pin; the DC-DC voltage reduction circuit is connected with the water meter valve control circuit; the LDO voltage reduction circuit and the battery power supply circuit are connected with the MCU main control circuit, the BLE Bluetooth circuit and the water meter metering circuit; the MCU master control circuit is connected with the BLE Bluetooth circuit, the water meter metering circuit, the water meter valve control circuit and the TC-BUS communication circuit.

2. The TC-BUS electronic remote water meter circuit according to claim 1, wherein said DC-DC voltage reduction circuit takes power from the TC-BUS, and is opened only when a valve control command is received and during the execution of the valve control, and is closed otherwise.

3. The TC-BUS electronic remote water meter circuit of claim 1, wherein the MCU master control circuit collects the voltage VBUS between the resistors R2 and R9 by means of resistance voltage division to identify whether the TC-BUS is powered or not.

4. The TC-BUS electronic remote water meter circuit according to claim 1, wherein the LDO step-down circuit stabilizes TC-BUS voltage to 5V, and comprises a resistor R6, a triode VT1, and a voltage regulator tube N2.

5. The TC-BUS electronic remote water meter circuit according to claim 1, wherein the TC-BUS communication circuit rectifies the TC-BUS voltage by a chip D3 to output voltage to provide input voltage for the DC-DC step-down circuit and the LDO step-down circuit, and communicates with the MCU by chips D1 and D2, and the TC-BUS protector is input to the front end.

6. The TC-BUS electronic remote water meter circuit of claim 5, wherein a chip D2 in the TC-BUS communication circuit is TC 001B.

7. The TC-BUS electronic remote water meter circuit of claim 5, wherein the TC-BUS communication circuit TC-BUS protector is composed of two devices of a thermistor RT1 and a TVS tube VP1, and the TC-BUS BUS is subjected to current limiting protection by RT1, then is subjected to voltage limiting protection by VP1, and then supplies power to the water meter.

Technical Field

The invention relates to the technical field of electronic remote water meters, in particular to a TC-BUS electronic remote water meter circuit.

Background

Electronic remote water meters have replaced traditional mechanical water meters and become the mainstream of water metering. At present, wired communication modes of the electronic remote water meter are mainly RS485 and M-BUS. The RS485 water meter has the disadvantages of high wire rod requirement, short transmission distance, weak load node capacity and poor electromagnetic compatibility due to RS485 bus transmission, and the range, the quantity and the data accuracy of the water meter reading are seriously influenced. The M-BUS water meter overcomes many defects of an RS485 water meter by adopting an M-BUS BUS, but the cost is high, and the problem of meter burning exists between collectors of different manufacturers and the MBUS water meter in use.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a TC-BUS electronic remote water meter circuit which comprises a TC-BUS communication circuit, an MCU master control circuit, a DC-DC voltage reduction circuit, an LDO voltage reduction circuit, a BLE Bluetooth circuit, a water meter valve control circuit, a water meter metering circuit and a battery power supply circuit. The TC-BUS BUS communication and the Bluetooth local debugging are adopted for centralized reading of the water meter, so that the higher node power supply capacity of the centralized reading of the water meter is realized, the data reliability of the water meter under remote transmission is improved, and the installation and debugging of field personnel of meter meters of the water meter and the timely inquiry of water consumption information of the meter meters of a user are facilitated.

Further, the TC-BUS communication circuit obtains electricity from the external collector to supply power to the TC-BUS water meter, realizes communication between the TC-BUS water meter and the external collector, and simultaneously converts the TC-BUS into a TTL serial port to be communicated with the MCU main control circuit;

the MCU main control circuit is used for analyzing signals acquired by the water meter metering circuit, operating the water meter valve control circuit to drive the base meter valve, monitoring the power supply state of the TC-BUS, reporting abnormal operation information, controlling the operation state of the DC-DC voltage reduction circuit, and configuring related parameters of the MCU through communication with the BLE Bluetooth circuit;

the DC-DC voltage reduction circuit is used for reducing the voltage of the power supply of the TC-BUS communication circuit and supplying power to the water meter valve control circuit;

the LDO voltage reduction circuit is used for obtaining the voltage reduction of the power supply voltage of the TC-BUS communication circuit and supplying power to the TC-BUS water meter main control circuit and the BLE Bluetooth circuit;

the BLE Bluetooth circuit is used for maintaining and upgrading the local information of the water meter, and communicating with the Bluetooth terminal equipment to configure parameters such as TC-BUS water meter metering, valve control and the like;

the water meter valve control circuit is used for taking electricity from the TC-BUS through the DC-DC voltage reduction circuit to drive the base meter actuator to open and close a water meter valve without using a battery power supply or a LDO voltage reduction circuit power supply;

the water meter metering circuit is used for collecting a pulse signal from a water meter base meter sensor;

the battery power supply circuit is isolated from a power supply of the LDO step-down circuit which gets electricity from the TC-BUS through a diode VD3, and when the TC-BUS supplies power to the water meter, the battery power supply circuit does not supply power to the MCU main control circuit, the BLE Bluetooth circuit and the water meter metering circuit;

the TC-BUS communication circuit is connected with the DC-DC voltage reduction circuit and the LDO voltage reduction circuit, and is connected with the MUC main control circuit through a TTL pin; the DC-DC voltage reduction circuit is connected with the water meter valve control circuit; the LDO voltage reduction circuit and the battery power supply circuit are connected with the MCU main control circuit, the BLE Bluetooth circuit and the water meter metering circuit; the MCU master control circuit is connected with the BLE Bluetooth circuit, the water meter metering circuit, the water meter valve control circuit and the TC-BUS communication circuit.

Further, the DC-DC voltage reduction circuit takes power from a TC-BUS BUS, is opened only when receiving a valve control command and during valve control execution, and is closed under other conditions. Further, the MCU main control circuit collects the voltage VBUS between the resistors R2 and R9 in a resistor voltage division mode to identify whether the TC-BUS is powered or not.

Further, the LDO step-down circuit stabilizes the TC-BUS voltage to 5V and consists of a resistor R6, a triode VT1 and a voltage regulator tube N2.

Furthermore, the TC-BUS communication circuit rectifies one path of TC-BUS BUS voltage through a chip D3 to output voltage so as to provide input voltage for the DC-DC voltage reduction circuit and the LDO voltage reduction circuit, the other path of TC-BUS BUS voltage is communicated with the MCU through chips D1 and D2, and a TC-BUS protector is input to the front end of the TC-BUS communication circuit.

Furthermore, the model of a chip D2 in the TC-BUS communication circuit is TC 001B.

Furthermore, the TC-BUS communication circuit TC-BUS protector is composed of a thermistor RT1 and a TVS tube VP1, and the TC-BUS is subjected to current limiting protection by RT1 and then is subjected to voltage limiting protection by VP1 and then supplies power to the water meter.

The invention has the beneficial technical effects that: the TC-BUS BUS technology is adopted for the electronic remote transmission water meter, so that the data reliability in remote transmission is ensured, the load node capacity of meter centralized reading is improved, the cost of a water meter BUS circuit is reduced, and the scheme is far superior to the current RS485 and M-BUS BUS water meter schemes; the Bluetooth equipment such as a mobile phone is adopted to configure parameters of the water meter and inquire data, field personnel can conveniently debug and install the water meter and a user can inquire meter water consumption information in time, and the requirement of the existing intelligent water meter is met.

Drawings

Fig. 1 is a schematic diagram of the whole circuit structure of the TC-BUS electronic remote water meter circuit of the present invention.

Fig. 2 is a schematic diagram of a battery power supply circuit of the TC-BUS electronic remote water meter circuit of the present invention.

FIG. 3 is a schematic diagram of an LDO step-down circuit of the TC-BUS electronic remote water meter circuit of the present invention.

Fig. 4 is a schematic diagram of a DC-DC voltage reduction circuit of the TC-BUS electronic remote water meter circuit of the present invention.

FIG. 5 is a schematic diagram of the TC-BUS communication circuit of the TC-BUS electronic remote water meter circuit of the present invention.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1, a TC-BUS electronic remote water meter circuit comprises a TC-BUS communication circuit, which takes electricity from a collector to supply power to the TC-BUS water meter and realizes communication between the TC-BUS water meter and the collector; the MCU master control circuit is used for collecting metering data of the TC-BUS water meter, controlling the valve to be opened and closed, monitoring the power supply state of the power supply circuit, reporting abnormal operation information and configuring relevant parameters through communication with the BLE Bluetooth circuit; the DC-DC voltage reduction circuit is used for reducing the voltage of the power supply of the TC-BUS communication circuit and supplying power to the TC-BUS water meter valve control circuit; the LDO voltage reduction circuit is used for obtaining the voltage reduction of the power supply voltage of the TC-BUS communication circuit and supplying power to the BLE Bluetooth circuit and the TC-BUS water meter main control circuit; the BLE Bluetooth circuit is communicated with Bluetooth terminal equipment such as a mobile phone and the like to configure parameters such as TC-BUS water meter metering, valve control and the like; the water meter valve control circuit drives the water meter actuator to open and close the water meter valve; the water meter metering circuit is used for acquiring a pulse signal of the metering sensor; and the battery power supply circuit supplies power to the TC-BUS water meter when the TC-BUS is not supplied with power. The connection relationship is as follows: the TC-BUS communication circuit is connected with the DC-DC voltage reduction circuit and the LDO voltage reduction circuit to supply power for the DC-DC voltage reduction circuit and is connected with the MUC main control circuit through TTL to carry out communication; the DC-DC voltage reduction circuit is connected with the water meter valve control circuit and supplies power to the water meter valve control circuit; the LDO voltage reduction circuit and the battery power supply circuit are connected with the MCU master control circuit, the BLE Bluetooth circuit and the water meter metering circuit and supply power to the MCU master control circuit, the BLE Bluetooth circuit and the water meter metering circuit; the MCU master control circuit is connected with the BLE Bluetooth circuit to realize Bluetooth communication, is connected with the water meter metering circuit to collect metering pulse signals, is connected with the water meter valve control circuit to control the state of a valve, and is connected with the TC-BUS communication circuit to upload data to the collector.

As shown in fig. 2, the battery power supply circuit is isolated from the power supply of the LDO buck circuit which takes power from the TC-BUS by a diode VD3, preventing the power supply of the LDO buck circuit from recharging the battery, which results in damage to the li-sub battery; because LDO step-down circuit voltage is higher than battery voltage to also realize that battery supply circuit does not supply power for MCU master control circuit, BLE bluetooth circuit, water gauge measurement circuit when the TC-BUS is the water gauge power supply.

As shown in fig. 3, the LDO buck circuit is composed of a resistor R6, a transistor VT1, and a voltage regulator N2, and regulates the TC-BUS voltage to 5V; the diodes VD1 and VD2 prevent the battery from reversely flowing current to the voltage regulator tube N2 when the TC-BUS is not powered, so that the power loss of the battery is reduced; and feeding back the voltage VBUS between the resistors R2 and R9 to the MCU main control circuit in a resistor voltage division mode to identify whether the TC-BUS BUS is powered or not.

As shown in fig. 4, the DC-DC voltage reduction circuit obtains a voltage TC-BUS from a TC-BUS to supply power to the power chip N1, and an output voltage MOT _ VCC supplies power to the water meter valve control circuit; the MCU main control circuit opens or closes the output of the DC-DC step-down circuit by controlling the G-pole voltage DC-DC-DTR of the MOS tube VT2 in the DC-DC step-down circuit, thereby realizing that the DC-DC step-down circuit outputs voltage only when receiving a valve control command and executing the valve control, and the DC-DC step-down circuit is in a closed state under other conditions, further realizing that the switching power supply does not generate interference on bus communication, and simultaneously reducing the bus consumption current.

As shown in fig. 5, a TC-BUS protector is input to the front end of the TC-BUS communication circuit, and power is taken from the TC-BUS, subjected to RT1 current-limiting protection, subjected to VP1 voltage-limiting protection, and then supplied to the water meter, so as to prevent the TC-BUS water meter from being mistakenly connected with a 220V power supply meter; after the TC-BUS BUS power is taken and passes through the TC-BUS protector, one path of the power is rectified by a chip D3 to output voltage to provide input voltage for a DC-DC voltage reduction circuit and an LDO voltage reduction circuit, and the other path of the power is rectified by a chip D1 to supply power to a TC-BUS communication chip D2 with the model of TC 001B. The 2 nd pin SIN of the chip D2 of the TC-BUS communication circuit demodulates the voltage drop of the TC-BUS BUS and sends the message from the collector to the MCU main control circuit through the 7 th pin RXD of the collector; when the 4 th pin TXD of the chip D2 receives a message from the MCU master control circuit, the current is modulated and transmitted to the collector by 20mA pulled down through the 2 nd pin SIN.

The invention realizes an electronic remote water meter based on TC-BUS technology, ensures the data reliability in remote transmission, improves the load node capacity of meter centralized reading, reduces the cost of a water meter BUS circuit, and is far superior to the current RS485 and M-BUS water meters.

The above-mentioned embodiments are illustrative of the specific embodiments of the present invention, and are not restrictive, and those skilled in the relevant art can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention, so that all equivalent technical solutions should be included in the scope of the present invention.