CN111369778A - Intelligent gas meter with power bus carrier digital signal - Google Patents
Intelligent gas meter with power bus carrier digital signal Download PDFInfo
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- CN111369778A CN111369778A CN202010334315.5A CN202010334315A CN111369778A CN 111369778 A CN111369778 A CN 111369778A CN 202010334315 A CN202010334315 A CN 202010334315A CN 111369778 A CN111369778 A CN 111369778A
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- 238000004891 communication Methods 0.000 claims abstract description 80
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010411 cooking Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5458—Monitor sensor; Alarm systems
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Abstract
The invention relates to an intelligent gas meter of a power bus carrier digital signal, which comprises: a gas meter body and a controller; the controller comprises a bus, a voltage stabilizing circuit, a processor, a valve motor and a communication circuit. The invention provides an intelligent gas meter with a power bus carrier digital signal, which adopts a voltage modulation circuit and a current modulation circuit with digital logic levels to be connected with a wireless communication network bridge through a bus, so that the valve of the intelligent gas meter can be automatically closed when the countdown is finished when the wireless communication network bridge is connected with the intelligent gas meter through the power bus for half-duplex communication and the time set by the wireless communication network bridge is set. Furthermore, the normally closed electric valve arranged in the intelligent gas meter can be remotely managed in a networked mode and monitored and controlled through the wireless communication network bridge, gas leakage is avoided, the safety of the user using the gas is high, and the system is simple in structure, unique in function and ingenious.
Description
Technical Field
The invention relates to an intelligent gas meter with a power bus carrier digital signal, and belongs to the technical field of gas equipment.
Background
The existing intelligent gas meters, such as IC card intelligent gas meters, wireless communication meter reading type intelligent gas meters or wired communication meter reading type intelligent gas meters, have no function that a user autonomously sets the gas use time to control and turn off the intelligent gas meters to output gas; the existing IC card intelligent gas meter and meter reading type intelligent gas meter can be independently arranged on a gas pipeline for a gas cooking bench and a water heater to use gas; in addition, in the normal use process of the existing IC card intelligent gas meter or meter reading type intelligent gas meter, a valve arranged in the intelligent gas meter outputs gas in a normally open mode, and the interior of a cooking bench and a water heater connected with a gas pipeline output by the intelligent gas meter is in a gas passing state; because the gas pipe connected with the gas pipe output by the existing intelligent gas meter is connected with the cooking bench and the interior of the water heater are always in a state of gas, the gas pipe connected with the gas pipe output by the existing intelligent gas meter, the cooking bench and the interior of the water heater always have gas pressure; therefore, gas leakage is likely to occur at the plurality of places, and in addition, gas leakage occurs when a user uses the gas stove improperly, the gas stove has quality problems, and the like, so that explosion is likely to be caused.
The invention discloses a wireless communication intelligent gas meter controller and a control method thereof, (application publication No. CN 104199388A); the patent technology is a wireless communication intelligent gas meter controller, namely a patent specially applied for a wireless communication network bridge, and a signal of a carrier wave on a Bus of a corresponding DCPL-Bus intelligent gas meter is an analog signal.
The DCPL-Bus carrier communication mode invented by the inventor has two forms: one is that the power bus carrier signal is an analog signal, and a modem is needed in the communication circuit of two computers or micro-processing circuits, and the bus communication mode has the advantages of long communication distance and high circuit cost.
Disclosure of Invention
The invention aims to solve the technical problems that: the intelligent gas meter provided by the invention can enable a built-in valve of the intelligent gas meter to be in a normally closed off state in a non-use period through network setting.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an intelligent gas meter of a power bus carrier digital signal comprises: a gas meter body and a controller; the controller comprises a bus interface, a voltage stabilizing circuit, a processor, a valve motor and a communication circuit; the bus interface can be connected with a bus of the network bridge, and the bus is a bus provided by the network bridge and provided with digital signals on a carrier wave on a direct current power supply; the bus supplies power to the processor, the valve motor and the communication circuit through the voltage stabilizing circuit; the processor drives the valve motor to act; the valve motor drives a valve of the gas meter body to open or close a gas channel of the gas meter body; the communication circuit comprises a digital current modulation circuit and a digital voltage modulation circuit; the digital current modulation circuit comprises a first triode, a second triode, a first resistor, a first capacitor, a third diode and a fourth resistor; the positive electrode of the bus interface is connected with the collector electrode of the first triode, the base electrode of the first triode is connected with the collector electrode of the second triode, the emitter electrode of the second triode is connected with the positive electrode of the output of the voltage stabilizing circuit, the base electrode of the second triode is sequentially connected with the third diode and the fourth resistor in series and then connected with the first communication pin of the processor, the emitter electrode of the first triode is connected with the negative electrode of the bus interface through the first resistor, and the first resistor is connected with the first capacitor in parallel; the digital voltage modulation circuit comprises a third triode, a fourth triode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a seventh capacitor and an eighth capacitor; the positive electrode of the bus interface is connected with the base electrode of the third triode through the fifth resistor, the emitting electrode of the third triode is connected with the positive electrode of the power supply through the fourth diode which is connected in series in the reverse direction, the collector of the third triode is connected with the base of the fourth triode, the base of the fourth triode is also connected with the negative electrode of the power supply through a seventh resistor, the collector of the fourth triode is connected with the second communication pin of the microprocessor, the collector of the fourth triode is also connected with the positive electrode of the output of the voltage stabilizing circuit through an eighth resistor, the emitting electrode of the fourth triode is connected with the negative electrode of the power supply, the sixth resistor is connected between the base electrode of the third triode and the negative electrode of the power supply, the sixth resistor is connected in parallel with the seventh capacitor, and the eighth capacitor is connected between the collector of the fourth triode and the negative electrode of the power supply.
The scheme is further improved in that: the voltage stabilizing circuit comprises a super capacitor and a voltage stabilizing chip; the input end of the voltage stabilizing chip is connected with the anode of the bus interface through a first current limiting resistor; the output end of the voltage stabilizing chip is sequentially connected with a second current limiting resistor in series, and a second diode is connected with the anode of the super capacitor; the cathode of the super capacitor is connected with the cathode of the bus interface; and the anode and the cathode of the super capacitor are the anode and the cathode of the output of the voltage stabilizing circuit.
The scheme is further improved in that: the Bus interface can be connected with a DCPL-Bus and is in network connection with a network bridge through the DCPL-Bus.
The scheme is further improved in that: the intelligent gas meter can be connected to a gas management unit through a bridge wireless NB-IoT or WiFi network.
The scheme is further improved in that: the processor is also connected with a display, a storage chip and a gas metering sensor.
The scheme is further improved in that: the intelligent gas meter can set the gas service time through the network bridge.
The scheme is further improved in that: the valve of the intelligent gas meter can be opened only by setting the gas use time through the network by a user, the gas is used in a set time interval, and the valve of the intelligent gas meter is closed when the gas use time exceeds the set time interval.
The intelligent gas meter of the power bus carrier digital signal is connected with the bus through the digital voltage modulation circuit and the digital current modulation circuit and further connected with the wireless communication network bridge through the bus, so that half-duplex communication through the internet is realized, and the function that a normally closed electric valve arranged in the intelligent gas meter can be opened to use gas by setting the gas use time through wireless communication by a gas user is realized; and when the set time countdown is finished, the valve of the intelligent gas meter can be automatically closed. Furthermore, the normally closed electric valve arranged in the intelligent gas meter can be remotely managed in a networked mode and monitored and controlled through the wireless communication network bridge, gas leakage is avoided, the safety of the user using the gas is high, and the system is simple in structure, unique in function and ingenious. The power bus carrier signal in the intelligent gas meter provided by the invention is a digital signal, and a modem is not needed in two computers or communication circuits, so that the intelligent gas meter has the advantages of low cost and short communication distance.
Drawings
The invention will be further explained with reference to the drawings.
Fig. 1 is a front view of a preferred embodiment of the present invention.
Fig. 2 is a side view schematic of the structure of fig. 1.
Fig. 3 is a schematic circuit diagram of a preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of the internet of things with the smart gas meter and the wireless communication bridge connected.
Detailed Description
Examples
The intelligent gas meter of power bus carrier digital signal of this embodiment, as shown in fig. 1 and fig. 2, includes: a gas meter body 10 and a controller; the gas meter body 10 is similar to the prior art, and is provided with a valve 50, a gas inlet, a gas outlet and a mechanical dial 20. The gas inlet of the gas meter body 10 is arranged on a gas pipeline of a house, and as the built-in valve 50 is in a normally closed state and the gas outlet of the gas meter body 10 is normally without gas output, a gas cooking bench and a water heater connected with a gas pipe are normally in a state that no gas is available and cannot be used; the mechanical dial 20 is a decimal mechanical digital roller for gas metering.
As shown in fig. 3, the controller includes a bus interface JK, a voltage regulator circuit, a processor IC1, a valve motor MD and a communication circuit; the bus interface JK can be connected with a bus of the network bridge; the bus supplies power to the processor IC1, the valve motor MD and the communication circuit through the voltage stabilizing circuit
The processor IC1 drives the valve motor MD to operate through the driving circuit IC 7; the valve motor MD drives the valve 50 of the gas meter body 10 to open or close the gas passage of the gas meter body 10.
The communication circuit comprises a power supply digital current modulation circuit and a digital voltage modulation circuit. The Bus interface JK can be connected with a DCPL-Bus; the DCPL-Bus carrier is a digital signal (logic signal); the communication circuit is connected to the network via a DCPL-Bus and a network bridge connected to the DCPL-Bus. Specifically, the carrier on the DCPL-Bus is an analog signal (sine wave signal), and the specification refers to "wireless communication bridge device with multiple link buses" (application publication No. CN 102014523A) or "wireless communication intelligent gas meter controller and control method thereof" (application publication No. CN 104199388A).
Through the setting, the intelligent gas meter valve can be opened only when a wireless communication network bridge is connected with a DCPL-Bus interface of the intelligent gas meter through a DCPL-Bus, the DCPL-Bus interface of the intelligent gas meter is also a power supply interface, and a user sets the gas use time through the wireless communication network bridge, and uses gas in a set time interval.
Furthermore, the intelligent gas meter is connected with the wireless communication network bridge through a DCPL-Bus, and is networked with the urban gas management center through network bridge NB-IoT wireless communication or a family WiFi network, so that a gas user safe use service platform supervised by the urban Internet of things is constructed. As shown in fig. 4, a schematic diagram of an internet of things in which an intelligent gas meter and a wireless communication bridge are connected; the intelligent gas meter 100 installed in each gas user, the wireless communication network bridge 200 and the remote city gas management information center are connected; the intelligent gas meter 100 in each gas user is connected with the wireless communication network bridge 200 through a DCPL-Bus, and the gas user can open the normally closed electric valve built in the intelligent gas meter 100 and use gas in a set time interval by setting the gas use time through a keyboard on the wireless communication network bridge 200. In this embodiment, a user of the wireless communication network bridge 200 can set the gas use time through a keyboard, open the valve 50 of the intelligent gas meter 100 to use gas, and when the countdown of the set time is completed, the valve 50 of the intelligent gas meter 100 is automatically closed and is in a normally closed state; when the wireless communication network bridge 200, the intelligent gas meter 100 and the gas user are related, the user can use the intelligent gas meter of the invention only by setting the gas use time. For example, by setting, the user is allowed to set the usage time range to 15 minutes, 30 minutes, 1 hour, and 2 hours at maximum.
The digital current modulation circuit comprises a triode T1, a triode T2, a resistor R1, a capacitor C1, a diode D3 and a resistor R4; the positive electrode of the bus interface JK is connected with a protective diode D0 in series and then connected with the collector of a triode T1, the base of a triode T1 is connected with the collector of a triode T2, the emitter of the triode T2 is connected with the positive electrode of a power supply, the base of a triode T2 is connected with a diode D3 and a resistor R4 in series in sequence and then connected with a communication pin TXD of a processor IC1, the emitter of a triode T1 is connected with the negative electrode of the bus interface JK through a resistor R1, and a resistor R1 is connected with a capacitor C1 in parallel.
The digital voltage modulation circuit comprises a triode T3, a triode T4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C7, a capacitor C8 and the like; the positive pole of bus interface JK passes through protection diode D0, and then passes through resistance R5 and connects the base of triode T3, the projecting pole of triode T3 passes through diode D4 of reverse series connection and connects the positive pole of the power, the collecting pole of triode T3 connects the base of triode T4, the base of triode T4 still passes through resistance R7 and connects the power negative pole, the communication pin RXD of treater IC1 is connected to the collecting pole of triode T4, the collecting pole of triode T4 still passes through resistance R8 and connects the power positive pole, the projecting pole of triode T4 connects the power negative pole, be connected with resistance R6 between the base of triode T3 and the power negative pole, resistance R6 connects in parallel capacitance C7, be connected with electric capacity C8 between the collecting pole of triode T4 and the power negative pole.
The UART communication serial port TXD of the IC1 of the microprocessor forms a digital current type modulation communication circuit through a resistor R4, a diode D3, a triode T2, a triode T1, a resistor R1 and a capacitor C1, and the digital current type modulation communication circuit is received by the wireless communication bridge through a DCPL-Bus interface and a DCPL-Bus; digital voltage type modulation communication signals sent by the wireless communication bridge pass through a DCPL-Bus interface and a DCPL-Bus interface, pass through a digital voltage modulation receiving circuit consisting of resistors R5-R8, capacitors C7-C8, triodes T3-T4 and a diode D4, and are output by a collector of a triode T4 and connected to an RXD end of a UART communication serial port to complete IC1 half-duplex communication of the wireless communication bridge and the microprocessor; therefore, the circuit structure is simplified, the stability and the safety are improved, meanwhile, the networking of the intelligent gas meter is realized, and the uplink and downlink of digital information are realized through half-duplex communication.
The half-duplex communication between the wireless communication network bridge and the intelligent gas meter is completed through the digital current modulation circuit and the digital voltage modulation circuit; the DCPL-Bus interface or the DCPL-Bus is a digital communication line which is provided with a direct current power supply by a wireless communication network bridge to supply power to the intelligent gas meter, and a two-wire positive and negative power line is also between the wireless communication network bridge and the intelligent gas meter.
The voltage stabilizing circuit comprises a super capacitor C4 and a voltage stabilizing chip IC 8; the input end of the voltage-stabilizing chip IC8 is connected with the anode of the bus interface JK through a current-limiting resistor R0 (because the protection diode D0 is arranged, the input end needs to be connected with the cathode of the protection diode D0); the output end of the voltage stabilizing chip IC8 is sequentially connected with a current limiting resistor R2 and a diode D2 in series to be connected with the anode of a super capacitor C4; the negative electrode of the super capacitor C4 is connected with the negative electrode of the bus interface JK; the positive electrode and the negative electrode of the super capacitor C4 are the positive electrode and the negative electrode output by the voltage stabilizing chip IC 8. The voltage stabilizing chip IC8 adopts a three-terminal voltage stabilizing circuit chip with the output of 3.7V; the ground terminal of the super capacitor is also connected with the super capacitor C4 and the negative electrode of the bus interface JK. The supercapacitor C4 is a farad supercapacitor with a 5.5V withstand voltage. The present embodiment operates by means of the power supplied by the bus. The voltage stabilizing circuit is also provided with filter capacitors at the input and the output of the voltage stabilizing chip IC8 according to requirements; and a bidirectional voltage limiting diode D1 and the like are arranged at the bus interface JK for carrying out conventional settings such as filtering, voltage stabilization and the like.
Whether the DCPL-Bus is open-circuit or not is judged according to the high and low levels of the P0.1 end of the processor IC1, if the DCPL-Bus is open-circuit, the P0.1 end of the processor IC1 and the I/O end of the connecting resistor R9 are low levels at the same time, a power VCC is temporarily provided by the super capacitor C4 at the moment, the valve motor is rapidly started by the processor IC1 within 3 seconds to close the valve of the intelligent gas meter, so that the intelligent gas meter cannot output gas, and further, a gas stove and a water heater which are connected with the output of the intelligent gas meter cannot obtain gas and cannot use the gas.
The processor IC1 is also connected with a display IC4, a memory chip IC3, and a gas amount sensor. The LCD display device in which the display IC4 employs an SPI interface or employs an I80(MCU) interface, wherein the LCD display device is exposed from the fenestration 30 of the gas meter body 10. The memory chip IC3 employs an I2C bus digital memory chip. The gas metering sensor is realized by using a first Hall sensor IC5 and a second Hall sensor IC6, and the first Hall sensor IC5 and the second Hall sensor IC6 adopt a switch type Hall circuit chip which can induce a magnetic field NS pole with low power consumption. The first hall sensor IC5 and the second hall sensor IC6 are a small-magnet sensing NS-pole switching type hall circuit chip; the small magnet is arranged on a primary metering output rotating shaft or a counting roller of the gas meter body 10, a first Hall sensor IC5 and a second Hall sensor IC6 sense a rotating magnetic field signal of an NS pole of the small magnet, the rotating magnetic field signal is converted into an electric pulse signal, and the processor IC1 carries out electronic counting metering.
The processor IC1 drives the valve motor via a motor driver chip IC7, and the motor driver chip IC7 uses the LG9110 driver circuit.
The processor IC1 has multiple I/O ports, 2I/O ports are selected to connect with IA and IB pins of the motor driving chip IC7, and the forward and reverse rotation of the valve motor MD is controlled to control the opening and closing of the valve; and another 2I/O ports are selected to be connected with a duplex limit microswitch XW, and the duplex limit microswitch XW is related to the opening and closing of the valve to limit the opening and closing limit positions of the valve. And another 1I/O port is selected to judge whether the DCPL-Bus interface is connected with a wireless communication bridge for power supply through a DCPL-Bus by judging the high and low level of a collector of a triode T4 through a resistor R9.
The processor IC1 adopts a 51-series low-power consumption 8-bit microprocessor, and is provided with a crystal oscillator Z1, a reset chip IC2 and the like as required.
The gas user must set the use time each time using gas, such as: the intelligent gas meter can be started to use gas in the countdown within the set time only after 15 minutes, 30 minutes and 1 hour and the maximum set time is 2 hours, and the intelligent gas meter automatically closes a gas valve after the countdown is zero within the set time; the intelligent gas meter with the function needs a user to use gas every time, the intelligent gas meter can be started only by setting the use time, if the valve of the intelligent gas meter does not set the use time of the gas is in a normally closed off state and does not output the gas, and a gas stove and a water heater connected to a gas output pipeline of the intelligent gas meter cannot be used
The intelligent gas meter of the power bus carrier digital signal of the embodiment provides a method which can make a built-in valve of the intelligent gas meter in a normally closed off state in a non-use period through network setting. Has the following characteristics:
1. because the intelligent gas meter is installed in a household kitchen in different modes, namely a wall-mounted mode and a kitchen range internal installation mode, a user cannot directly design a keyboard on the intelligent gas meter to operate and set the gas use time; the intelligent gas meter is connected with a household wireless communication network bridge by a DCPL-Bus, and the gas use time is set by operating through a keyboard on the wireless communication network bridge.
2. The parameters for setting the gas service time on the wireless communication network bridge keyboard are transmitted to the intelligent gas meter of the embodiment through the DCPL-Bus; the intelligent gas meter of the embodiment is only a gas meter with an intelligent execution mechanism without a power supply (such as a battery is not installed), and therefore the valve of the intelligent gas meter is reliably in a turn-off state for a long time in a power-free state, namely the intelligent gas meter of the embodiment cannot be used independently.
3. In order to prevent the illegal operation of the user, the built-in electric valve of the intelligent gas meter cannot be opened even if the intelligent gas meter is electrified in a private mode on the interface Bus of the intelligent gas meter in the embodiment, and in order to reduce the cost of the intelligent circuit, the DCPL-Bus carrier communication mode of the embodiment does not adopt a modem chip (such as an MSM7512 or an AMIS-49587 or an NCN49597 modem chip) with a relatively high price, namely, a communication digital signal of a processor is not adopted to be converted into an analog signal, and the analog signal is received by a modem of a wireless communication bridge at the other end through a power Bus carrier and is converted into a digital communication signal which can be received and sent by a microprocessing chip in the wireless communication bridge; instead, a specially designed non-chip low-cost transistor circuit is adopted to carry serial port communication digital signals of the microprocessor chip IC1 in the intelligent gas meter on a power bus, and the digital communication signals are directly received and sent by a communication serial port of the microprocessor chip in the wireless communication bridge at the other end through the power bus, namely the technical scheme is the main characteristic of the technology of the invention.
In summary, according to the intelligent gas meter provided by the embodiment, the NB-IoT mobile wireless communication platform or the home WiFi network through which the wireless communication bridge 200 can pass is networked with the city gas management information center, so that a gas user safe use service platform for monitoring the city internet of things is constructed, remote monitoring of the intelligent gas meter and network service gas users is realized, accidents such as explosion and fire caused by gas leakage due to unclosed gas valves can be effectively avoided, and the safety of gas use is further improved.
The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.
Claims (7)
1. An intelligent gas meter of a power bus carrier digital signal is characterized by comprising: a gas meter body and a controller; the controller comprises a bus interface, a voltage stabilizing circuit, a processor, a valve motor and a communication circuit; the bus interface can be connected with a bus of the network bridge, and the bus is a bus provided by the network bridge and provided with digital signals on a carrier wave on a direct current power supply; the bus supplies power to the processor, the valve motor and the communication circuit through the voltage stabilizing circuit; the processor drives the valve motor to act; the valve motor drives a valve of the gas meter body to open or close a gas channel of the gas meter body; the communication circuit comprises a digital current modulation circuit and a digital voltage modulation circuit; the digital current modulation circuit comprises a first triode, a second triode, a first resistor, a first capacitor, a third diode and a fourth resistor; the positive electrode of the bus interface is connected with the collector electrode of the first triode, the base electrode of the first triode is connected with the collector electrode of the second triode, the emitter electrode of the second triode is connected with the positive electrode of the output of the voltage stabilizing circuit, the base electrode of the second triode is sequentially connected with the third diode and the fourth resistor in series and then connected with the first communication pin of the processor, the emitter electrode of the first triode is connected with the negative electrode of the bus interface through the first resistor, and the first resistor is connected with the first capacitor in parallel; the digital voltage modulation circuit comprises a third triode, a fourth triode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a seventh capacitor and an eighth capacitor; the positive electrode of the bus interface is connected with the base electrode of the third triode through the fifth resistor, the emitting electrode of the third triode is connected with the positive electrode of the power supply through the fourth diode which is connected in series in the reverse direction, the collector of the third triode is connected with the base of the fourth triode, the base of the fourth triode is also connected with the negative electrode of the power supply through a seventh resistor, the collector of the fourth triode is connected with the second communication pin of the microprocessor, the collector of the fourth triode is also connected with the positive electrode of the output of the voltage stabilizing circuit through an eighth resistor, the emitting electrode of the fourth triode is connected with the negative electrode of the power supply, the sixth resistor is connected between the base electrode of the third triode and the negative electrode of the power supply, the sixth resistor is connected in parallel with the seventh capacitor, and the eighth capacitor is connected between the collector of the fourth triode and the negative electrode of the power supply.
2. The intelligent gas meter of power bus carrier digital signals according to claim 1, characterized in that: the voltage stabilizing circuit comprises a super capacitor and a voltage stabilizing chip; the input end of the voltage stabilizing chip is connected with the anode of the bus interface through a first current limiting resistor; the output end of the voltage stabilizing chip is sequentially connected with a second current limiting resistor in series, and a second diode is connected with the anode of the super capacitor; the cathode of the super capacitor is connected with the cathode of the bus interface; and the anode and the cathode of the super capacitor are the anode and the cathode of the output of the voltage stabilizing circuit.
3. The intelligent gas meter of power bus carrier digital signals according to claim 1, characterized in that: the Bus interface can be connected with a DCPL-Bus and is in network connection with a network bridge through the DCPL-Bus.
4. The intelligent gas meter of power bus carrier digital signals according to claim 3, characterized in that: the intelligent gas meter can be connected to a gas management unit through a bridge wireless NB-IoT or WiFi network.
5. The intelligent gas meter of power bus carrier digital signals according to claim 1, characterized in that: the processor is also connected with a display, a storage chip and a gas metering sensor.
6. The intelligent gas meter of power bus carrier digital signals according to claim 1, characterized in that: the intelligent gas meter can set the gas service time through the network bridge.
7. The intelligent gas meter of power bus carrier digital signals according to claim 6, characterized in that: the valve of the intelligent gas meter can be opened only by setting the gas use time through the network by a user, the gas is used in a set time interval, and the valve of the intelligent gas meter is closed when the gas use time exceeds the set time interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010334315.5A CN111369778B (en) | 2020-04-24 | 2020-04-24 | Intelligent gas meter for power bus carrier digital signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010334315.5A CN111369778B (en) | 2020-04-24 | 2020-04-24 | Intelligent gas meter for power bus carrier digital signal |
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| CN111369778A true CN111369778A (en) | 2020-07-03 |
| CN111369778B CN111369778B (en) | 2024-06-25 |
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| CN104199388A (en) * | 2014-03-24 | 2014-12-10 | 郭建国 | Wireless communication controlling device and method of intelligent gas meter |
| CN105894778A (en) * | 2016-05-27 | 2016-08-24 | 成都知人善用信息技术有限公司 | Periodic meter-reading system based on broadcasting and television network |
| CN106558213A (en) * | 2016-12-09 | 2017-04-05 | 杭州西力智能科技股份有限公司 | A kind of four table integrated information acquisition converters |
| CN212484578U (en) * | 2020-04-24 | 2021-02-05 | 荣成市宇翔实业有限公司 | Intelligent gas meter with power bus carrier digital signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0882642A (en) * | 1994-09-12 | 1996-03-26 | Tokyo Gas Co Ltd | Preventing device of consumption of battery of radio equipment in automatic meter-reading system |
| CN1527033A (en) * | 2003-09-24 | 2004-09-08 | 郭建国 | Preparying intelligent fuel gas meter terminal in DCPL network |
| FR2873839A1 (en) * | 2004-07-30 | 2006-02-03 | Der Ee Electrical Instr Co | Remote measurement device, for electrical applications, has modulator modulating digital signal into modulated signal that is sent to receiver by wireless connection, where amplified signal is processed to produce signal for display |
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| CN101931435A (en) * | 2010-07-30 | 2010-12-29 | 北京航空航天大学 | Low-voltage power line bandwidth carrier concentrator |
| CN104199388A (en) * | 2014-03-24 | 2014-12-10 | 郭建国 | Wireless communication controlling device and method of intelligent gas meter |
| CN105894778A (en) * | 2016-05-27 | 2016-08-24 | 成都知人善用信息技术有限公司 | Periodic meter-reading system based on broadcasting and television network |
| CN106558213A (en) * | 2016-12-09 | 2017-04-05 | 杭州西力智能科技股份有限公司 | A kind of four table integrated information acquisition converters |
| CN212484578U (en) * | 2020-04-24 | 2021-02-05 | 荣成市宇翔实业有限公司 | Intelligent gas meter with power bus carrier digital signal |
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| CN111369778B (en) | 2024-06-25 |
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