WO2021128416A1 - M-bus 接收电路和基于 m-bus 的 4g 水表采集器 - Google Patents

M-bus 接收电路和基于 m-bus 的 4g 水表采集器 Download PDF

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Publication number
WO2021128416A1
WO2021128416A1 PCT/CN2019/130561 CN2019130561W WO2021128416A1 WO 2021128416 A1 WO2021128416 A1 WO 2021128416A1 CN 2019130561 W CN2019130561 W CN 2019130561W WO 2021128416 A1 WO2021128416 A1 WO 2021128416A1
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WIPO (PCT)
Prior art keywords
resistor
capacitor
electrically connected
pin
diode
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PCT/CN2019/130561
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English (en)
French (fr)
Inventor
李冬
聂菊保
李冠儒
李冠熙
朱俊胜
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深圳市创仁科技有限公司
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Publication of WO2021128416A1 publication Critical patent/WO2021128416A1/zh
Priority to US17/588,215 priority Critical patent/US20220155125A1/en

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Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18Supports or connecting means for meters
    • G01F15/185Connecting means, e.g. bypass conduits
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06Indicating or recording devices
    • G01F15/061Indicating or recording devices for remote indication
    • G01F15/063Indicating or recording devices for remote indication using electrical means
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/418Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4184Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00Electric signal transmission systems

Definitions

  • the invention relates to the technical field of data collectors, in particular to an M-BUS receiving circuit and a 4G water meter collector based on M-BUS.
  • the existing water meter collectors mostly use the M-BUS chip for power supply and data transmission.
  • the water meter communication interface of the water meter collector using the M-BUS chip has unstable power supply, and the signal-to-noise ratio is relatively low and stable. Low-performance water meter collectors are inconvenient to use.
  • the technical problem to be solved by the present invention is to provide an M-BUS receiving circuit and a 4G water meter collector based on M-BUS that can greatly improve the signal-to-noise ratio and realize high data receiving stability.
  • An M-BUS receiving circuit is arranged between the control unit and the M-BUS overcurrent protection circuit and used to connect the control unit and the M-BUS overcurrent protection circuit.
  • the M-BUS receiving circuit includes a capacitor C3 and a capacitor C2. , Voltage regulator chip U1, diode D1, resistor R16, resistor R10, resistor R8, resistor R17, capacitor C9, resistor R9, resistor R21, resistor R22, transistor Q4, Schmitt trigger U5C, resistor R124, resistor R105, transistor Q2, resistor R12, resistor R103, resistor R33, Schmitt trigger U5B, voltage comparator U3B, resistor R32, resistor R34, capacitor C75, resistor R15, diode D2, resistor R117, capacitor C7, capacitor C5, capacitor C8, Capacitor C10, voltage comparator U3A, resistor R29, diode D8, diode D9, diode D10, diode D11, capacitor C15, capacitor
  • the capacitor C3 and the capacitor C2 are connected in parallel, one end of the capacitor C3 and the capacitor C2 in parallel is grounded, and the other end of the capacitor C3 and the capacitor C2 in parallel and the third pin of the voltage regulator chip U1 are both connected to the 32V power supply.
  • the cathode of the diode D1 is electrically connected to the third pin of the voltage stabilizing chip U1, and the anode of the diode D1 is electrically connected to the second pin of the voltage stabilizing chip U1; the second lead of the voltage stabilizing chip U1
  • the pins are respectively electrically connected to one end of the resistor R10 and one end of the resistor R8, and the other end of the resistor R10 is respectively electrically connected to the first pin of the voltage stabilizing chip U1, one end of the resistor R16, one end of the capacitor C9 and one end of the resistor R17,
  • the other end of the resistor R16 is electrically connected to the collector of the transistor Q4, the base of the transistor Q4 is electrically connected to one end of the resistor R22, and the other end of the resistor R22 is respectively connected to one end of the resistor R9 and Schmitt trigger
  • the output end of U5C is electrically connected to one end of the resistor R21, the other end of the resistor R9 is connected
  • One end of the resistor R124 is electrically connected to the control unit, the other end of the resistor R124 is electrically connected to one end of the resistor R105 and the base of the transistor Q2, and the other end of the resistor R105 is connected to the emitter of the transistor Q2. Are grounded; the collector of the transistor Q2 is electrically connected to one end of the resistor R12, and the other end of the resistor R12 is electrically connected to an input end of the Schmitt trigger U5B and one end of the resistor R103.
  • the other end is connected to one end of the resistor R33 and both are connected to a 3.3V power supply; the other end of the resistor R33 is electrically connected to the other input end of the Schmitt trigger U5B and the output end of the voltage comparator U3B, respectively.
  • the output end of the mitt trigger U5B is electrically connected to the control unit;
  • the forward input end of the voltage comparator U3B is electrically connected to one end of the resistor R32, one end of the resistor R34, and one end of the capacitor C75, one end of the resistor R32 Connected to a 3.3V power supply, the other end of the resistor R34 and the other end of the capacitor C75 are connected to each other and both are grounded;
  • the reverse input end of the voltage comparator U3B is connected to the 3.3V power supply through the resistor R15;
  • the reverse input end of the voltage comparator U3B is electrically connected to one end of the capacitor C8, one end of the capacitor C10, and the output end of the voltage comparator U3A, the other end of the capacitor C10 is grounded, and the other end of the capacitor C8 is respectively It is electrically connected to the forward input end of the voltage comparator U3A, the anode of the diode D8, the cathode of the diode D10, and one end of the resistor R18; the reverse input end of the voltage comparator U3A is respectively connected to one end of the resistor R29 and the cathode of the diode D8 ,
  • the anode of the diode D9, one end of the capacitor C15, one end of the capacitor C16, one end of the capacitor C17, one end of the capacitor C81 and one end of the resistor R20 are electrically connected, the other end of the resistor R29, the other end of the capacitor C15, and the other end of the capacitor C16 The other end, the other end of
  • the reverse input end of the operational amplifier U15B is electrically connected to the output end of the operational amplifier U15B, and the forward input end of the operational amplifier U15B is electrically connected to the output end of the operational amplifier U15A, one end of the capacitor C202, and one end of the resistor R205, respectively
  • the other end of the capacitor C202, the other end of the resistor R205, one end of the capacitor C200 and one end of the resistor R203 are electrically connected to the inverting input end of the operational amplifier U15A, the other end of the capacitor C200 is grounded, and the resistor R203
  • the other end of the resistor R201 is electrically connected to one end of the resistor R201 and the anode of the Zener diode ZW10, the other end of the resistor R201 is grounded, and the cathode of the Zener diode ZW10 is respectively connected to the second pin of the voltage stabilizer chip U1 and the resistor R7.
  • One end of the resistor R7 is electrically connected, and the other end of the resistor R7 is electrically connected to the cathode of the Zener diode ZW11, one end of the capacitor C4 and the M-BUS overcurrent protection circuit; the anode of the Zener diode ZW11 is respectively connected to one end of the resistor R202 Electrically connected to one end of the resistor R204, the other end of the resistor R202 is grounded, the other end of the resistor R204 is electrically connected to one end of the capacitor C201 and the positive input end of the operational amplifier U15A, and the other end of the capacitor C201 is grounded , The power terminal of the operational amplifier U15A is grounded through the capacitor C203;
  • the anode of the diode D2 is connected to a 32V power supply, the cathode of the diode D2 is electrically connected to one end of the resistor R117 and one end of the capacitor C7, and the other end of the resistor R117 is electrically connected to one end of the capacitor C5.
  • the other end and the other end of the capacitor C5 are connected to each other and both are grounded.
  • a 4G water meter collector based on M-BUS including a power supply module, a control unit, a 4G communication module, a Bluetooth communication module, a SIM card circuit, a water meter communication interface, an antenna, a lightning protection circuit, and the above-mentioned M-BUS receiving circuit;
  • the power module is electrically connected to the control unit and the 4G communication module
  • the control unit is electrically connected to the SIM card circuit, the Bluetooth communication module, and the M-BUS receiving circuit
  • the 4G communication module is electrically connected to the antenna
  • the M -The BUS receiving circuit is electrically connected with the water meter communication interface
  • the water meter communication interface is electrically connected with the lightning protection circuit.
  • the M-BUS receiving circuit provided by the present invention is arranged between the control unit and the M-BUS overcurrent protection circuit and is used to connect the control unit and the M-BUS overcurrent protection circuit.
  • the M-BUS receiving circuit is regulated by an adjustable voltage regulator. Power supply LM317, Schmitt trigger CD4093, comparator LM393, transistor Q2, transistor Q4, diode D2, diode D8, diode D9, diode D10, diode D1 and several resistance-capacitance circuits.
  • the system is boosted by 12VDC to 32VDC.
  • Adjustable regulated power supply U1 adjusts the voltage to ⁇ 15VDC, and the voltage regulator tube reduces the voltage to 7.5VDC, and then outputs a high level through the first pin of the comparator U3 and inputs it to the second comparator IN- and IN+ pins 1.5VDC, output low level at pin 7 to trigger Schmitt trigger to receive MBUS communication data.
  • the base of the transistor Q2 is controlled by the single-chip microcomputer to enable the Schmitt trigger. When it needs to receive MBUS data, this pin will be enabled.
  • the transistor Q4 is the ADJ pin of the regulator U1 to control the adjustment voltage at about 15VDC.
  • the diode D2 and the capacitor isolate the 32VDC voltage, that is, when the input 12VDC power supply fluctuates, it will not affect the MBUS communication within the mS level.
  • the diode D10 isolates the signal of the second pin of the comparator from the diode D8 and the diode D9
  • a limiter circuit is formed to prevent the comparator from entering the zero-crossing comparison; the diode D1 is connected to the input pin and the ground pin of the voltage stabilizer U1 to prevent the protection voltage signal from being connected to damage the effect of the voltage stabilizer U1. Therefore, the M-BUS receiving circuit provided by the present invention can greatly improve the signal-to-noise ratio, and the reliability and stability are significantly improved.
  • the 4G water meter collector based on M-BUS provided by the present invention can effectively improve the stability of water meter data collection.
  • Figure 1 is a circuit connection diagram of the M-BUS receiving circuit of the present invention
  • FIG. 2 is a circuit connection diagram of the control unit of the present invention.
  • Figure 3 is a module connection diagram of the 4G water meter collector based on M-BUS of the present invention.
  • FIG. 4 is a circuit connection diagram of the power supply module of the present invention.
  • FIG. 5 is a circuit connection diagram of the 4G communication module of the present invention.
  • FIG. 6 is a circuit connection diagram of the SIM card circuit of the present invention.
  • FIG. 7 is a circuit connection diagram of the Bluetooth communication module of the present invention.
  • Figure 8 is a circuit connection diagram of the water meter communication interface of the present invention.
  • FIG. 9 is a circuit connection diagram of the first branch circuit of the lightning protection circuit of the present invention.
  • FIG. 10 is a circuit connection diagram of the second branch circuit of the lightning protection circuit of the present invention.
  • FIG. 11 is a circuit connection diagram of the third branch circuit of the lightning protection circuit of the present invention.
  • FIG. 13 is a circuit connection diagram of the fifth branch circuit of the lightning protection circuit of the present invention.
  • Figure 14 is a circuit connection diagram of the overcurrent protection circuit of the present invention.
  • 15 is a circuit connection diagram of 12VDC-32VDC of the M-BUS power supply circuit of the present invention.
  • Figure 16 is a 4.2VDC-7.2VDC circuit connection diagram of the M-BUS power supply circuit of the present invention.
  • Figure 17 is a circuit connection diagram of the storage module of the present invention.
  • Figure 18 is a circuit connection diagram of the buzzer module of the present invention.
  • FIG. 19 is a circuit connection diagram of the temperature sensing module of the present invention.
  • Figure 20 is a circuit connection diagram of the indicator light module of the present invention.
  • Figure 21 is a circuit connection diagram of the transceiver of the present invention.
  • 22 is a circuit connection diagram of the 7.2V battery power detection circuit of the present invention.
  • Figure 23 is a circuit connection diagram of the switching regulator circuit of the present invention.
  • Figure 24 is a circuit connection diagram of the 485 communication circuit of the present invention.
  • Figure 25 is a circuit connection diagram of the reset circuit of the present invention.
  • FIG. 26 is a connection diagram of the battery charging overvoltage protection circuit of the present invention.
  • Fig. 27 is a connection diagram of the ⁇ -type low-pass filter circuit of the MCU power supply terminal of the present invention.
  • Figure 28 is a circuit connection diagram of the program download interface circuit of the present invention.
  • Figure 29 is a circuit connection diagram of the memory power supply control output circuit of the present invention.
  • an M-BUS receiving circuit provided by the present invention is provided between the control unit and the M-BUS overcurrent protection circuit and used to connect the control unit and the M-BUS overcurrent protection circuit.
  • Current protection circuit includes a capacitor C3, a capacitor C2, a voltage regulator chip U1, a diode D1, a resistor R16, a resistor R10, a resistor R8, a resistor R17, a capacitor C9, a resistor R9, a resistor R21, a resistor R22, Transistor Q4, Schmitt trigger U5C, resistor R124, resistor R105, transistor Q2, resistor R12, resistor R103, resistor R33, Schmitt trigger U5B, voltage comparator U3B, resistor R32, resistor R34, capacitor C75, resistor R15, diode D2, resistor R117, capacitor C7, capacitor C5, capacitor C8, capacitor C10, voltage comparator U3A, resistor
  • the capacitance value of the capacitor C3 is 0.1uF; the capacitance value of the capacitor C2 is 0.01uF; the model of the voltage regulator chip U1 is LM317AMDT; the model of the diode D1 is SS16; the resistance value of the resistor R16 is 2.4K ⁇ ; the resistance value of the resistor R10
  • the resistance value of the resistor R8 is 5.1K ⁇ ; the resistance value of the resistor R17 is 1M ⁇ ; the capacitance value of the capacitor C9 is 0.01uF; the resistance value of the resistor R9 is 1M ⁇ ; the resistance value of the resistor R21 is 10K ⁇ ; the resistance value of the resistor R22
  • the model of transistor Q4 is MMBT5551; the model of Schmitt trigger U5C is 4093; the resistance of resistor R124 is 1K ⁇ ; the resistance of resistor R105 is 1K ⁇ ; the model of transistor Q2 is MMBT5551; the resistance of resistor R12 is 1K ⁇ ; the resistance of resistor
  • the capacitor C3 and the capacitor C2 are connected in parallel, one end of the capacitor C3 and the capacitor C2 in parallel is grounded, and the other end of the capacitor C3 and the capacitor C2 in parallel and the third pin of the voltage regulator chip U1 are both connected to the 32V power supply.
  • the cathode of the diode D1 is electrically connected to the third pin of the voltage stabilizing chip U1, and the anode of the diode D1 is electrically connected to the second pin of the voltage stabilizing chip U1; the second lead of the voltage stabilizing chip U1
  • the pins are respectively electrically connected to one end of the resistor R10 and one end of the resistor R8, and the other end of the resistor R10 is respectively electrically connected to the first pin of the voltage stabilizing chip U1, one end of the resistor R16, one end of the capacitor C9 and one end of the resistor R17,
  • the other end of the resistor R16 is electrically connected to the collector of the transistor Q4, the base of the transistor Q4 is electrically connected to one end of the resistor R22, and the other end of the resistor R22 is respectively connected to one end of the resistor R9 and Schmitt trigger
  • the output end of U5C is electrically connected to one end of the resistor R21, the other end of the resistor R9 is connected
  • One end of the resistor R124 is electrically connected to the control unit, the other end of the resistor R124 is electrically connected to one end of the resistor R105 and the base of the transistor Q2, and the other end of the resistor R105 is connected to the emitter of the transistor Q2. Are grounded; the collector of the transistor Q2 is electrically connected to one end of the resistor R12, and the other end of the resistor R12 is electrically connected to an input end of the Schmitt trigger U5B and one end of the resistor R103.
  • the other end is connected to one end of the resistor R33 and both are connected to a 3.3V power supply; the other end of the resistor R33 is electrically connected to the other input end of the Schmitt trigger U5B and the output end of the voltage comparator U3B, respectively.
  • the output end of the mitt trigger U5B is electrically connected to the control unit;
  • the forward input end of the voltage comparator U3B is electrically connected to one end of the resistor R32, one end of the resistor R34, and one end of the capacitor C75, one end of the resistor R32 Connected to a 3.3V power supply, the other end of the resistor R34 and the other end of the capacitor C75 are connected to each other and both are grounded;
  • the reverse input end of the voltage comparator U3B is connected to the 3.3V power supply through the resistor R15;
  • the reverse input end of the voltage comparator U3B is electrically connected to one end of the capacitor C8, one end of the capacitor C10, and the output end of the voltage comparator U3A, the other end of the capacitor C10 is grounded, and the other end of the capacitor C8 is respectively It is electrically connected to the forward input end of the voltage comparator U3A, the anode of the diode D8, the cathode of the diode D10, and one end of the resistor R18; the reverse input end of the voltage comparator U3A is respectively connected to one end of the resistor R29 and the cathode of the diode D8 ,
  • the anode of the diode D9, one end of the capacitor C15, one end of the capacitor C16, one end of the capacitor C17, one end of the capacitor C81 and one end of the resistor R20 are electrically connected, the other end of the resistor R29, the other end of the capacitor C15, and the other end of the capacitor C16 The other end, the other end of
  • the reverse input end of the operational amplifier U15B is electrically connected to the output end of the operational amplifier U15B, and the forward input end of the operational amplifier U15B is electrically connected to the output end of the operational amplifier U15A, one end of the capacitor C202, and one end of the resistor R205, respectively
  • the other end of the capacitor C202, the other end of the resistor R205, one end of the capacitor C200 and one end of the resistor R203 are electrically connected to the inverting input end of the operational amplifier U15A, the other end of the capacitor C200 is grounded, and the resistor R203
  • the other end of the resistor R201 is electrically connected to one end of the resistor R201 and the anode of the Zener diode ZW10, the other end of the resistor R201 is grounded, and the cathode of the Zener diode ZW10 is respectively connected to the second pin of the voltage stabilizer chip U1 and the resistor R7.
  • One end of the resistor R7 is electrically connected, and the other end of the resistor R7 is electrically connected to the cathode of the Zener diode ZW11, one end of the capacitor C4 and the M-BUS overcurrent protection circuit; the anode of the Zener diode ZW11 is respectively connected to one end of the resistor R202 Electrically connected to one end of the resistor R204, the other end of the resistor R202 is grounded, the other end of the resistor R204 is electrically connected to one end of the capacitor C201 and the positive input end of the operational amplifier U15A, and the other end of the capacitor C201 is grounded , The power terminal of the operational amplifier U15A is grounded through the capacitor C203;
  • the anode of the diode D2 is connected to a 32V power supply, the cathode of the diode D2 is electrically connected to one end of the resistor R117 and one end of the capacitor C7, and the other end of the resistor R117 is electrically connected to one end of the capacitor C5.
  • the other end and the other end of the capacitor C5 are connected to each other and both are grounded.
  • the M-BUS receiving circuit provided by the present invention is arranged between the control unit and the M-BUS overcurrent protection circuit and is used to connect the control unit and the M-BUS overcurrent protection circuit.
  • the M-BUS receiving circuit is regulated by an adjustable voltage regulator. Power supply LM317, Schmitt trigger CD4093, comparator LM393, transistor Q2, transistor Q4, diode D2, diode D8, diode D9, diode D10, diode D1 and several resistance-capacitance circuits.
  • the system is boosted by 12VDC to 32VDC.
  • Adjustable regulated power supply U1 adjusts the voltage to ⁇ 15VDC, and the voltage regulator tube reduces the voltage to 7.5VDC, and then outputs a high level through the first pin of the comparator U3 and inputs it to the second comparator IN- and IN+ pins 1.5VDC, output low level at pin 7 to trigger Schmitt trigger to receive MBUS communication data.
  • the base of the transistor Q2 is controlled by the single-chip microcomputer to enable the Schmitt trigger. When it needs to receive MBUS data, this pin will be enabled.
  • the transistor Q4 is the ADJ pin of the regulator U1 to control the adjustment voltage at about 15VDC.
  • the diode D2 and the capacitor isolate the 32VDC voltage, that is, when the input 12VDC power supply fluctuates, it will not affect the MBUS communication within the mS level.
  • the diode D10 isolates the signal of the second pin of the comparator from the diode D8 and the diode D9
  • a limiter circuit is formed to prevent the comparator from entering the zero-crossing comparison; the diode D1 is connected to the input pin and the ground pin of the voltage stabilizer U1 to prevent the protection voltage signal from being connected to damage the effect of the voltage stabilizer U1. Therefore, the M-BUS receiving circuit provided by the present invention can greatly improve the signal-to-noise ratio, and the reliability and stability are significantly improved.
  • the control unit includes a control chip U7 with a model of STM32L15xRC, and both input terminals of the Schmitt trigger U5C are electrically connected to the 29th pin (labeled USART3_TX) of the control chip U7, One end of the resistor R124 is electrically connected to the 59th pin (labeled EN1) of the control chip U7, and the output end of the Schmitt trigger U5B is connected to the thirtieth pin (labeled USART3_RX) of the control chip U7. ) Electrical connection.
  • the specific parameters of each electronic component in Figure 2 are as follows:
  • the resistance value of the resistor R134 is 1M ⁇
  • the resistance value of the resistors R135, R52, R69, and R63 is 10K ⁇
  • the model of the MOS tube is 2301
  • the model of the SL1 is SL353LT.
  • the capacitance value of the capacitors C26, C32, and C43 is 0.1 ⁇ F
  • the resistance value of the resistor R59 is 1K ⁇
  • the capacitance value of the capacitors C31, C33 is 12pF
  • the crystal frequency of the crystal oscillator X1 is 32.768K.
  • the above-mentioned control unit consists of a single-chip microcomputer chip U7, various bypass capacitors, various control capacitors, various control resistors and crystal oscillators, and communication interfaces.
  • the capacitor C26 is connected to the single-chip VDD_1 power supply pin
  • the capacitor C32 is connected to the single-chip VDD_2 power supply pin.
  • C30 and resistor R61 are connected to the RST pin of the microcontroller chip to form a reset circuit.
  • One end of the crystal oscillator is connected to the OSC32_OUT pin of the microcontroller chip and connected to the capacitor C31, and the other end is connected to the OSC32_IN pin of the microcontroller chip and connected to the capacitor C33. It forms an oscillator circuit and provides a clock frequency of 32.768kHz.
  • the present invention also provides a 4G water meter collector based on M-BUS, which includes a power supply module 1, a control unit 2, a 4G communication module 4, a Bluetooth communication module 3, a SIM card circuit 5, and a water meter communication interface 7, Antenna 11, lightning protection circuit 6 and the aforementioned M-BUS receiving circuit 8;
  • the power module 1 is electrically connected to the control unit 2 and the 4G communication module 4, and the control unit 2 is electrically connected to the SIM card circuit 5, the Bluetooth communication module 3, and the M-BUS receiving circuit 8.
  • the 4G communication module 4 It is electrically connected to the antenna 11, the M-BUS receiving circuit 8 is electrically connected to the water meter communication interface 7, and the water meter communication interface 7 is electrically connected to the lightning protection circuit 6.
  • the 4G water meter collector based on M-BUS provided by the present invention can effectively improve the stability of water meter data collection.
  • the power module includes inductor J0, inductor L1, inductor L2, inductor L3, inductor L4, diode D15, resistor RP1, regulator tube ZD1, plug-in interface J2, MOS tube Q5, resistor R35, resistor R37, resistor R40, resistor R42, capacitor C19, voltage regulator chip U9, capacitor C34, capacitor C35, ceramic capacitor E4, ceramic capacitor E5, capacitor C36 and capacitor C37;
  • the nominal value of the inductance J0 is 0R; the nominal value of the inductance L1, the inductance L2, the inductance L3, and the inductance L4 are 220R/1A; the model of the diode D15 is SS34; the model of the resistor RP1 is PTC GP250-3A; The model of ZD1 is SMBJ15; the model of plug-in interface J2 is Component_1; the model of MOS tube Q5 is 2302; the resistance of resistor R35 is 4.7K ⁇ ; the resistance of resistor R37 is 100K ⁇ ; the resistance of resistor R40 is 1M ⁇ ; the resistance of resistor R42 is The resistance value is 1M ⁇ ; the capacitance value of the capacitor C19 is 0.1uF; the model of the voltage regulator chip U9 is S-812C33; the capacitance value of the capacitor C34 is 200 ⁇ F and the voltage value is 25V; the capacitance value of the capacitor C35 is 100nF; the ceramic capacitor E4 The capac
  • One end of the inductor J0 is electrically connected to the battery +BAT, the other end of the inductor J0 is electrically connected to the cathode of the diode D15, and the anode of the diode D15 is respectively connected to one end of the inductor L1, one end of the inductor L2, and one end of the resistor R42 Electrically connected, the other end of the inductor L1 is electrically connected to the other end of the inductor L2, one end of the resistor RP1, and one end of the voltage regulator ZD1, and the other end of the resistor RP1 is electrically connected to the first pin of the jack J2 ,
  • the other end of the voltage regulator tube ZD1 is electrically connected to the second pin of the socket J2, the third pin of the socket J2, one end of the inductor L3, and one end of the inductor L4; the other end of the inductor L3 and The other ends of the inductor L4 are connected to each other and both are grounded; the other end
  • the second pin of the voltage stabilizing chip U9, one end of the capacitor C34, one end of the capacitor C35, and one end of the ceramic capacitor E4 are connected to each other and electrically connected to the battery +BAT, and the third pin of the voltage stabilizing chip U9 ,
  • One end of the ceramic capacitor E5, one end of the capacitor C36 and one end of the capacitor C37 are connected to each other and are all connected to a 3.3V power supply.
  • the first pin of the chip U9, the other end of the ceramic capacitor E5, the other end of the capacitor C36, and the other end of the capacitor C37 are connected to each other and grounded.
  • the above-mentioned power module is composed of inductor L1, inductor L2, inductor L3, inductor L4, diode ZD1, diode D15, switch tube Q5, resistor R35, resistor R37, resistor R40, resistor R42, and connector Component_1, which are used to provide each control unit Provide a voltage signal, where the socket Component_1 is connected to one end of the resistor RP1, the socket Component_1 is connected to the inductor L3, the inductor L4, and the diode ZD1 and grounded, and the other end of the resistor RP1 is connected to the inductor L1, the inductor L2, the inductor L3, the inductor L4, The diode ZD1 is connected to form an overvoltage and filter circuit, and the switch tube Q5, resistor R35, resistor R37, resistor R40, and resistor R42 form a voltage control circuit.
  • the above-mentioned structure solves the problem of difficulty in obtaining power from the collector.
  • the standby current of the power supply is less than 0.3 ⁇ A, which can supply power for a long time, making it possible to break through the constraints of difficult on-site power obtaining.
  • the 4G communication module includes integrated chip GSM1, capacitor C46, capacitor C47, capacitor C48, capacitor C49, ceramic capacitor E8, ceramic capacitor E9, Zener diode Z6, resistor R100, transistor Q19, diode D22, Diode D23, resistor R106, resistor R114, resistor R88, capacitor C54 and capacitor C55;
  • the capacitance value of the capacitor C46 is 10pF; the capacitance value of the capacitor C47 is 33pF; the capacitance value of the capacitor C48 is 100nF; the capacitance value of the capacitor C49 is 0.022 ⁇ F; the capacitance value of the ceramic capacitor E8 is 22 ⁇ F;
  • the capacitance value is 220 ⁇ F and the voltage value is 25V;
  • the model of the Zener diode Z6 is ZMM5V1ST;
  • the resistance of the resistor R100 is 1K ⁇ ; the model of the transistor Q19 is 9013; the model of the diode D22 and the diode D23 is 1N4148; the model of the resistor R106 and the resistor R114
  • the resistance value is 10K ⁇ ; the resistance value of the resistor R88 is 0R.
  • the model of the integrated chip GSM1 is M26FA-03-STD, one end of the capacitor C46, one end of the capacitor C47, one end of the capacitor C48, one end of the capacitor C49, one end of the ceramic capacitor E8, one end of the ceramic capacitor E9 and
  • the cathodes of the Zener diode Z6 are connected to each other and are electrically connected to the 42nd pin and the 43rd pin of the integrated chip GSM1; the other end of the capacitor C46, the other end of the capacitor C47, and the other end of the capacitor C48 ,
  • the other end of the capacitor C49, the other end of the ceramic capacitor E8, the other end of the ceramic capacitor E9 and the anode of the Zener diode Z6 are connected to each other and are all grounded;
  • the base of the transistor Q19 is electrically connected to the fifteenth pin of the control chip U7 through a resistor R100, the collector of the transistor Q19 is electrically connected to the seventh pin of the integrated chip GSM1, and the emitter of the transistor Q19 is grounded ;
  • the eleventh pin, the twelfth pin, the thirteenth pin and the fourteenth pin of the integrated chip GSM1 are respectively electrically connected with the SIM card circuit;
  • the seventeenth pin of the integrated chip GSM1 is electrically connected to the anode of the diode D23 and one end of the resistor R114, the cathode of the diode D23 is electrically connected to the sixteenth pin of the control chip U7, and the other of the resistor R114 One end is electrically connected to the twenty-fourth pin of the integrated chip GSM1; the eighteenth pin of the integrated chip GSM1 is electrically connected to the anode of the diode D22, and the cathode of the diode D22 is respectively connected to one end of the resistor R106 and the control chip U7
  • the seventeenth pin of the resistor R106 is electrically connected, and the other end of the resistor R106 is grounded; the thirty-fifth pin of the integrated chip GSM1 is electrically connected to one end of the resistor R88 and one end of the capacitor C54, and the other end of the capacitor C54 One end is grounded, the other end of the resistor R88 is electrically connected to one end of the
  • the above 4G communication module consists of module chip GSM1, capacitor C46, capacitor C47, capacitor C48, capacitor E8, capacitor E9, capacitor C49, capacitor C54, capacitor C55, antenna J13, capacitor C68, capacitor C69, capacitor C70, capacitor C71, diode Z6, diode D22, diode D23, transistor Q19, resistor R106, resistor R88, resistor R100, resistor R114, resistor R115, resistor R116 and SIM card and card slot SIM CARO composed of, among them, capacitor C46, capacitor C47, capacitor C48, capacitor E8, capacitor E9, capacitor C49, and diode Z6 are connected in parallel between VBAT and GND of the Bluetooth chip.
  • the capacitor C54, the capacitor C55, and the resistor R88 form an antenna signal transceiver circuit, which is connected to the 4G chip RF_AIN pin to complete the 4G data reception and transmission.
  • Transistor Q19 and resistor R100 form a signal control switch.
  • the diode D22 and the diode D23 are connected to the RXD and TXD pins of the 4G chip to form a signal isolation circuit.
  • the SIM card circuit includes an integrated chip U13, a resistor R115, a resistor R116, an integrated chip U12, a capacitor C68, a capacitor C69, a capacitor C70, and a capacitor C71;
  • the resistance value of the resistor R116 is 0R; the capacitance value of the capacitor C68 is 0.1 uF; the capacitance value of the capacitor C69, the capacitor C70, and the capacitor C71 is 22 pF.
  • the integrated chip U13 is M2M-SMD, and the integrated chip U12 is SIM-CARD;
  • the first pin and the ninth pin of the integrated chip U13 are grounded, and the second pin of the integrated chip U13 is electrically connected to the eleventh pin of the integrated chip GSM1 through a resistor R115.
  • the first pin of the integrated chip U13 is electrically connected to the eleventh pin of the integrated chip GSM1.
  • the three pins are electrically connected to the eleventh pin of the integrated chip GSM1 through the resistor R116, the sixth pin of the integrated chip U13 is electrically connected to the thirteenth pin of the integrated chip GSM1, and the seventh pin of the integrated chip U13 is electrically connected.
  • the pin is electrically connected to the twelfth pin of the integrated chip GSM1, and the eighth pin of the integrated chip U13 is electrically connected to the fourteenth pin of the integrated chip GSM1;
  • the first pin of the integrated chip U12 is respectively electrically connected to the fourteenth pin of the integrated chip GSM1 and one end of the capacitor C68, and the second pin of the integrated chip U12 is respectively connected to the twelfth pin of the integrated chip GSM1 Is electrically connected to one end of the capacitor C69, the third pin of the integrated chip U12 is electrically connected to the thirteenth pin of the integrated chip GSM1 and one end of the capacitor C70, and the seventh pin of the integrated chip U12 is respectively connected to the
  • the eleventh pin of the chip GSM1 is electrically connected to one end of the capacitor C71, the fifth pin of the integrated chip U12, the other end of the capacitor C68, the other end of the capacitor C69, the other end of the capacitor C70 and the other end of the capacitor C71 Connect to each other and both are grounded.
  • the antenna J13, the capacitor C68, the capacitor C69, the capacitor C70, the capacitor C71, the SIM card and the SIM CARO card slot are connected to form a SIM card slot module, which can support SIM card communication.
  • the Bluetooth communication module includes a resistor R1, a resistor R2, a resistor R5, a capacitor C1, a MOS tube Q1, an integrated chip U4, a capacitor C11, a capacitor C12, a resistor R13, a diode D6, and a diode D7;
  • the resistance of resistor R1 is 47K ⁇ ; the resistance of resistor R2 is 1K ⁇ ; the resistance of resistor R5 is 4.7K ⁇ ; the capacitance of capacitor C1 is 0.1uF; the model of MOS transistor Q1 is 2301; the capacitance of capacitor C11 is 0.1uF; the capacitance value of capacitor C12 is 22uF; the resistance value of resistor R13 is 10K ⁇ ; the models of diode D6 and diode D7 are 1N4148;
  • One end of the resistor R1 is electrically connected to the source of the MOS transistor Q1 and both are connected to a 3.3V power supply; the other end of the resistor R1 is electrically connected to the gate of the MOS transistor Q1 and one end of the resistor R5, respectively. The other end is electrically connected to the 33rd pin of the control chip U7; the drain of the MOS transistor Q1 is electrically connected to one end of the capacitor C1 and one end of the resistor R2, and the other end of the capacitor C1 is electrically connected to the other end of the resistor R2. One end is grounded; the drain of the MOS transistor Q1 is electrically connected to one end of the resistor R13;
  • the other end of the resistor R13 is electrically connected to the seventeenth pin of the integrated chip U4 and the anode of the diode D6, and the cathode of the diode D6 is electrically connected to the 42nd pin of the control chip U7; the diode D7
  • the cathode of the integrated chip U4 is electrically connected to the sixteenth pin; the anode of the diode D7 is electrically connected to the 43rd pin of the control chip U7; the first and sixth pins of the integrated chip U4 And the fourteenth pin are both grounded;
  • the second pin of the integrated chip U4 is electrically connected to one end of the capacitor C11 and one end of the capacitor C12, and the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded.
  • the above-mentioned Bluetooth module is composed of Bluetooth control chip U4, capacitor C11, capacitor C12, resistor R13, diode D6, and diode D7.
  • One end of capacitor C11 and capacitor C12 is connected to VDD of Bluetooth control chip U4, and the other end is connected to GND pin.
  • Phase connection forms a bypass circuit
  • diode D6 and diode D7 form a connection with the RX and TX pins of the Bluetooth chip to form a signal isolation circuit.
  • the above-mentioned structure solves the problem that the near-end communication interface of the collector needs a connection line and is easy to contact poorly.
  • the collector has a built-in Bluetooth module, which can be operated by Bluetooth connection through the mobile phone APP.
  • the water meter communication interface includes a resistor R57, a MOS tube Q9, a resistor R62, a resistor R58, a capacitor C27, an interface J10, and an interface J11;
  • the resistance value of resistor R57 is 47K ⁇ ; the model of MOS transistor Q9 is 2301; the resistance value of resistor R62 is 4.7K ⁇ ; the resistance value of resistor R58 is 1K ⁇ ; the capacitance value of capacitor C27 is 0.1uF;
  • One end of the resistor R57 is electrically connected to the source of the MOS transistor Q9 and both are connected to a 3.3V power supply; the other end of the resistor R57 is electrically connected to the gate of the MOS transistor Q9 and one end of the resistor R62, respectively. The other end is electrically connected to the 39th pin of the control chip U7.
  • the drain of the MOS transistor Q9 is electrically connected to one end of the capacitor C27 and one end of the resistor R58. The other end of the capacitor C27 is grounded. The other end of R58 is grounded;
  • the first pin of the interface J10, the first pin of the interface J11, and the drain of the MOS transistor Q9 are connected to each other; the second pin of the interface J10, the second pin of the interface J11, and the first pin of the control chip U7
  • the twenty-ninth pin is electrically connected; the third pin of the interface J10, the third pin of the interface J11, and the thirtieth pin of the control chip U7 are electrically connected;
  • the fourth pin of the interface J10 is grounded, so The fourth pin of the interface J11 is grounded, and the fifth pin of the interface J11 is connected to the battery +BAT.
  • the water meter communication interface includes jack J11, resistor R57, resistor R62, resistor R58, capacitor C27, and MOS transistor Q9.
  • resistor R57, resistor R62, resistor R58, capacitor C27, and MOS transistor Q9 are composed The water meter power control realizes that the collector and the water meter are at the same level.
  • the lightning protection circuit includes a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, and a fifth branch circuit;
  • the first branch circuit includes resistor R48, resistor R54, MOS transistor Q8, diode D16, relay RL1, diode Z2, interface J5, and relay RL5; wherein the resistance of resistor R48 is 10K ⁇ ; The resistance value is 1M ⁇ ; the model of MOS tube Q8 is 2302; the model of diode D16 is 1N4148; the model of relay RL1 is HFD4/5; the model of diode Z2 is TVS-Z; the model of relay RL5 is HF42F/05;
  • One end of the resistor R48 is electrically connected to the fifty-fourth pin of the control chip U7, and the other end of the resistor R48 is electrically connected to the gate of the MOS transistor Q8 and one end of the resistor R54.
  • the source of the MOS transistor Q8 is The electrode and the other end of the resistor R54 are both grounded; the drain of the MOS transistor Q8 is electrically connected to the anode of the diode D16, the eighth pin of the relay RL1 and the eighth pin of the relay RL5, and the cathode of the diode D16 is respectively Electrically connected to the first pin of the relay RL1 and the first pin of the relay RL5, the third pin of the relay RL1 is electrically connected to the sixth pin of the relay RL5, and the sixth pin of the relay RL1 is electrically connected to the relay The third pin of RL5 is electrically connected, the fourth pin of the relay RL1 is electrically connected to one end of the diode Z2, the first pin of the interface J5,
  • the second branch circuit includes a resistor R56, a resistor R60, a MOS tube Q10, a diode D17, a relay RL2, a diode Z3, an interface J9, and a relay RL6; wherein the resistance value of the resistor R56 is 10K ⁇ ; The resistance value is 1M ⁇ ; the model of MOS tube Q10 is 2302; the model of diode D17 is 1N4148; the model of relay RL2 is HFD4/5; the model of diode Z3 is TVS-Z; the model of relay RL6 is HF42F/05;
  • One end of the resistor R56 is electrically connected to the 55th pin of the control chip U7, and the other end of the resistor R56 is electrically connected to the gate of the MOS transistor Q10 and one end of the resistor R60.
  • the source of the MOS transistor Q10 The electrode and the other end of the resistor R60 are both grounded; the drain of the MOS transistor Q10 is electrically connected to the anode of the diode D17, the eighth pin of the relay RL2, and the eighth pin of the relay RL6, and the cathode of the diode D17 is respectively It is electrically connected to the first pin of the relay RL2 and the first pin of the relay RL6, the third pin of the relay RL2 is electrically connected to the sixth pin of the relay RL6, and the sixth pin of the relay RL2 is electrically connected to the relay.
  • the third pin of RL6 is electrically connected, and the fourth pin of the relay RL2 is electrically connected to one end of the diode Z3, the first pin of the interface J9 and the fifth pin of the relay RL6, and the fifth pin of the relay RL2
  • the pins are respectively electrically connected to the other end of the diode Z3, the second pin of the interface J9 and the fourth pin of the relay RL6;
  • the third branch circuit includes resistor R64, resistor R65, MOS transistor Q11, diode D18, relay RL3, diode Z4, interface J12, and relay RL7; wherein the resistance of resistor R64 is 10K ⁇ ; The resistance value is 1M ⁇ ; the model of MOS tube Q11 is 2302; the model of diode D18 is 1N4148; the model of relay RL3 is HFD4/5; the model of diode Z4 is TVS-Z; the model of relay RL7 is HF42F/05;
  • One end of the resistor R64 is electrically connected to the fifty-sixth pin of the control chip U7, and the other end of the resistor R64 is electrically connected to the gate of the MOS transistor Q11 and one end of the resistor R65.
  • the source of the MOS transistor Q11 The electrode and the other end of the resistor R65 are both grounded; the drain of the MOS transistor Q11 is electrically connected to the anode of the diode D18, the eighth pin of the relay RL3, and the eighth pin of the relay RL7, and the cathode of the diode D18 is respectively It is electrically connected to the first pin of the relay RL3 and the first pin of the relay RL7, the third pin of the relay RL3 is electrically connected to the sixth pin of the relay RL7, and the sixth pin of the relay RL3 is electrically connected to the relay.
  • the third pin of RL7 is electrically connected, the fourth pin of the relay RL3 is electrically connected to one end of the diode Z4, the first pin of the interface J12, and the fifth pin of the relay RL7, and the fifth pin of the relay RL3
  • the pins are respectively electrically connected to the other end of the diode Z4, the second pin of the interface J12 and the fourth pin of the relay RL7;
  • the fourth branch circuit includes resistor R80, resistor R82, MOS transistor Q16, diode D19, relay RL4, diode Z5, interface J14, and relay RL8; wherein the resistance of resistor R80 is 10K ⁇ ; the resistance of resistor R82 is The resistance value is 1M ⁇ ; the model of MOS tube Q16 is 2302; the model of diode D19 is 1N4148; the model of relay RL4 is HFD4/5; the model of diode Z5 is TVS-Z; the model of relay RL8 is HF42F/05;
  • One end of the resistor R80 is electrically connected to the 57th pin of the control chip U7, and the other end of the resistor R80 is electrically connected to the gate of the MOS transistor Q16 and one end of the resistor R82.
  • the source of the MOS transistor Q16 is The pole and the other end of the resistor R82 are both grounded; the drain of the MOS transistor Q16 is electrically connected to the anode of the diode D19, the eighth pin of the relay RL4, and the eighth pin of the relay RL8, and the cathode of the diode D19 is respectively It is electrically connected to the first pin of the relay RL4 and the first pin of the relay RL8, the third pin of the relay RL4 is electrically connected to the sixth pin of the relay RL8, and the sixth pin of the relay RL4 is electrically connected to the relay.
  • the third pin of the RL8 is electrically connected, and the fourth pin of the relay RL4 is electrically connected to one end of the diode Z5, the first pin of the interface J14, and the fifth pin of the relay RL8, and the fifth pin of the relay RL4
  • the pins are respectively electrically connected to the other end of the diode Z5, the second pin of the interface J14, and the fourth pin of the relay RL8;
  • the fifth branch circuit includes a resistor R131, a resistor R132, a resistor R129, a resistor R130, a MOS tube Q24, and a MOS tube Q23; wherein the resistance value of the resistance R131 is 10K ⁇ ; the resistance value of the resistance R132 and the resistance R129 1M ⁇ ; the resistance value of the resistor R130 is 1K ⁇ ; the model of the MOS tube Q24 is 2302; the model of the MOS tube Q23 is 2301;
  • One end of the resistor R131 is electrically connected to the 58th pin of the control chip U7, and the other end of the resistor R131 is electrically connected to the gate of the MOS transistor Q24 and one end of the resistor R132.
  • the source of the MOS transistor Q24 The electrode and the other end of the resistor R132 are both grounded; the drain of the MOS transistor Q24 is electrically connected to one end of the resistor R130, and the other end of the resistor R130 is respectively electrically connected to one end of the resistor R129 and the gate of the MOS transistor Q23, so
  • the other end of the resistor R129 is electrically connected to the source of the MOS transistor Q23, and the drain of the MOS transistor Q23 is connected to a 3.3V power supply.
  • the lightning protection circuit consists of TVS transient suppression diode ZD2, TVS transient suppression diode ZD3, TVS transient suppression diode ZD4, TVS transient suppression diode ZD5, communication connector J5, communication connector J9, and communication connector J12 is composed of J12 and communication jack J14, among which, TVS transient suppression diode ZD2 is connected with communication jack J5 to form the first lightning protection circuit; TVS transient suppression diode ZD3 is connected with communication jack J9 to form the second lightning protection circuit; TVS transient suppression diode ZD4 is connected with the communication jack J12 to form the third lightning protection circuit; TVS transient suppression diode ZD5 is connected with the communication jack J14 to form the fourth lightning protection circuit.
  • TVS transient suppression diode ZD2 is connected with communication jack J5 to form the first lightning protection circuit
  • TVS transient suppression diode ZD3 is connected with communication jack J9 to form the second lightning protection circuit
  • the 4G water meter collector based on M-BUS of the present invention also includes an overcurrent protection circuit, which includes a capacitor C58, a ceramic capacitor E10, a resistor R99, a MOS tube Q18, a resistor R101, and a transistor Q21.
  • an overcurrent protection circuit which includes a capacitor C58, a ceramic capacitor E10, a resistor R99, a MOS tube Q18, a resistor R101, and a transistor Q21.
  • the capacitance value of capacitor C58 is 0.1 ⁇ F; the capacitance value of ceramic capacitor E10 is 220 ⁇ F and the voltage is 50V; the resistance value of resistor R99 is 100K ⁇ ; the model of MOS tube Q18 is IRFR9024N; the resistance value of resistor R101 is 1K ⁇ ;
  • the model of Q21 is MMBT5551; the resistance of resistor R109 is 1K ⁇ ; the resistance of resistor R111 is 1M ⁇ ; the model of Schmitt trigger U5D is 4093; the resistance value of resistor R128 is 10K ⁇ ; the resistance of resistor R107 is 1.5M ⁇ ;
  • the capacitance value of the capacitor C66 is 10 ⁇ F; the capacitance value of the capacitor C18 is 0.1 ⁇ F; the model of the diode D21 is 1N4148; the capacitance value of the capacitor C62 is 0.1 ⁇ F; the model of the Schmitt trigger U5A is 4093; the resistance value of the resistor R25 10K ⁇ ; the model of transistor Q
  • One end of the capacitor C58, one end of the ceramic capacitor E10, one end of the resistor R99 and the source of the MOS transistor Q18 are connected to each other, the other end of the capacitor C58 and the other end of the ceramic capacitor E10 are all grounded, and the MOS transistor
  • the gate of Q18 is electrically connected to the other end of the resistor R99 and one end of the resistor R101, the other end of the resistor R101 is electrically connected to the collector of the transistor Q21, the emitter of the transistor Q21 is grounded, and the base of the transistor Q21 is grounded.
  • the poles are respectively electrically connected to one end of the resistor R109 and one end of the resistor R111, the other end of the resistor R111 is grounded, and the other end of the resistor R109 is respectively electrically connected to the output end of the Schmitt trigger U5D and one end of the resistor R128,
  • the other end of the resistor R128 is electrically connected to the 58th pin of the control chip U7, and the two input ends of the Schmitt trigger U5D are connected to each other and are respectively connected to the cathode of the diode D21, one end of the resistor R107, and the capacitor One end of C66, one end of the capacitor C18 and one end of the resistor R125 are electrically connected; the other end of the capacitor C66 and the other end of the capacitor C18 are both grounded, and the anode of the diode D21 is respectively connected to the other end of the resistor R107 and Schmitt trigger
  • the output terminal of the Schmitt trigger U5A is electrically connected, the power
  • the input terminals are connected to each other and electrically connected to one end of the resistor R25 and the collector of the transistor Q22, the other end of the resistor R25 is connected to a 3.3V power supply, and the base of the transistor Q22 is respectively connected to one end of the resistor R113 and the Zener diode
  • the anode of ZW2 is electrically connected, the other end of the resistor R113 and the emitter of the transistor Q22 are both grounded, and the cathode of the Zener diode ZW2 is electrically connected to one end of the capacitor C67, one end of the resistor R28, and one end of the resistor R110, respectively.
  • the other end of the capacitor C67 is electrically connected to one end of the resistor R126, one end of the capacitor C76, and one end of the resistor R97, and are all grounded; the other end of the resistor R126 is respectively connected to the other end of the resistor R125, the other end of the capacitor C76, and the resistor.
  • One end of R127 is electrically connected, the other end of the resistor R127 is electrically connected to the 35th pin of the control chip U7, the other end of the resistor R97 is electrically connected to one end of the resistor R31, and the other end of the resistor R31 is respectively It is electrically connected to the other end of the resistor R28, one end of the capacitor C13, and one end of the resistor R98.
  • the other end of the resistor R98 is electrically connected to one end of the capacitor C14 and the cathode of the Zener diode ZW4, and both are electrically connected to the third end of the control chip U7. Fifteen pins are electrically connected; the other end of the capacitor C13, the other end of the capacitor C14, and the anode of the Zener diode ZW4 are all grounded; the other end of the resistor R110 is electrically connected to the collector of the transistor Q20, the transistor Q20 The base is connected to the cathode of the Zener diode ZW3 and one of the resistor R108.
  • the other end of the resistor R108 is electrically connected to the emitter of the transistor Q20; the anode of the Zener diode ZW3 is electrically connected to the cathode of the Zener diode ZW11 in the M-BUS receiving circuit through the resistor R112.
  • the above-mentioned overcurrent protection circuit consists of Schmitt trigger U5, switching regulator Q18, switching regulator Q20, switching regulator Q22, switching regulator Q23, switching regulator Q24, and regulator. It is composed of semiconductor devices such as ZW2, Zener tube ZW3, Zener tube ZW4, diode D21, and a few resistive components. If the energy consumption is too large in the system, the single-chip microcomputer will trigger Schmidt through the 485-I_DET pin control. The trigger U5 turns on/off the switch regulator Q18 to achieve the purpose of over-current protection.
  • the 4G water meter collector based on M-BUS of the present invention also includes an M-BUS power supply circuit 9.
  • the M-BUS power supply circuit 9 includes a ceramic capacitor E6, a capacitor C51, a resistor R83, an inductor L7, and a resistor R90. , Resistor R91, capacitor C56, integrated chip U10, diode D20, capacitor C52, resistor R92, capacitor C59, capacitor C57, resistor R84, resistor R89, resistor R85, resistor R93, resistor R87, capacitor C50, capacitor C44, capacitor C45, Ceramic capacitor E7 and MOS tube Q17;
  • the capacitance value of the ceramic capacitor E6 is 22 ⁇ F; the capacitance value of the capacitor C51 is 0.1 ⁇ F; the resistance value of the resistor R83 is 100K ⁇ ; the inductance value of the inductor L7 is 22 ⁇ H; the resistance value of the resistor R90 is 33K ⁇ ; the resistance value of the resistor R91
  • the capacitance value of the capacitor C56 is 0.1 ⁇ F; the model of the diode D20 is SS36; the capacitance value of the capacitor C52 is 0.1 ⁇ F; the resistance value of the resistor R92 is 12K ⁇ ; the capacitance value of the capacitor C59 is 4700pF; the capacitance value of the capacitor C57 100pF; the resistance value of resistor R84 is 510K ⁇ ; the resistance value of resistor R89 is 20K ⁇ ; the resistance value of resistor R85 is 82K ⁇ ; the resistance value of resistor R93 is 10K ⁇ ; the resistance value of resistor R87 is 10R; the capacitance value of capacitor C50
  • the model of the integrated chip U10 is MPQ3426;
  • One end of the ceramic capacitor E6, one end of the capacitor C51, one end of the resistor R83, and one end of the inductor L7 are all electrically connected to the third pin of the integrated chip U10, and the other end of the ceramic capacitor E6 is electrically connected to the other end of the capacitor C51.
  • One end of the resistor R83 is grounded, the other end of the resistor R83 is electrically connected to the second pin of the integrated chip U10 and one end of the resistor R90, and one end of the resistor R91 is electrically connected to the fourteenth pin of the integrated chip U10.
  • One end of the capacitor C56 is electrically connected to the twelfth pin of the integrated chip U10, the other end of the resistor R90, the other end of the resistor R91 and the other end of the capacitor C56 are all grounded, and the eighth pin of the integrated chip U10, The ninth, tenth, eleventh, and fifteenth pins are all grounded, and the fourth, fifth, and sixth pins of the integrated chip U10 are connected to each other and are respectively connected to the inductor The other end of L7 is electrically connected to the anode of diode D20.
  • the cathode of diode D20 is electrically connected to one end of resistor R84, one end of capacitor C50, one end of capacitor C44, one end of capacitor C45, and one end of ceramic capacitor E7. Connected to a 32V power supply; the other end of the capacitor C44, the other end of the capacitor C45 and the other end of the ceramic capacitor E7 are all grounded; the 13th pin of the integrated chip U10 is connected to the other end of the resistor R84 and the other end of the capacitor C50. The other end, one end of the resistor R89 and one end of the resistor R85 are electrically connected. The other end of the resistor R89 is electrically connected to the source of the MOS transistor Q17 and is grounded.
  • the other end of the resistor R85 is electrically connected to the drain of the MOS transistor Q17.
  • the source of the MOS transistor Q17 is electrically connected to one end of the resistor R93, the gate of the MOS transistor Q17 is electrically connected to the other end of the resistor R93 and one end of the resistor R87, and the other end of the resistor R87 is electrically connected to the resistor R93.
  • the tenth pin of the Mitter trigger U5C is electrically connected; the first pin of the integrated chip U10 is electrically connected to one end of the resistor R92 and one end of the capacitor C57, and the other end of the resistor R92 is electrically connected to one end of the capacitor C59 The other end of the capacitor C57 and the other end of the capacitor C59 are both grounded; the seventh pin of the integrated chip U10 is grounded through the capacitor C52.
  • the 12VDC to 32VDC boost circuit is composed of the PWM switching regulator U10, the energy storage inductor L7, the adjusting tube Q17 and the surrounding resistance container components, and the 12VDC voltage is boosted to 32VDC is used for MBUS communication bus to complete the MBUS communication function.
  • the M-BUS power supply circuit also includes a capacitor C73, a capacitor C72, a capacitor C74, a resistor R119, an integrated chip U8, a resistor R118, a resistor R120, a resistor R121, a resistor R122, a resistor R123, a capacitor C38, a capacitor C39, Capacitor C40, Capacitor C41 and Inductance L9;
  • the capacitance value of capacitor C73 is 22uF;
  • the capacitance value of capacitor C72 is 0.1 ⁇ F;
  • the capacitance value of capacitor C74 is 0.022uF;
  • the resistance value of resistor R119 is 1M ⁇ ;
  • the model of the integrated chip U8 is MP2233;
  • the first pin of the integrated chip U8 is grounded through a capacitor C74; the second pin of the integrated chip U8 is grounded through a capacitor C73 and the second pin of the integrated chip U8 is connected to battery +BAT; the integrated chip U8 The fourth pin of the integrated chip U8 is grounded; the sixth pin of the integrated chip U8 is grounded through a resistor R119 and the sixth pin of the integrated chip U8 is electrically connected to the fifty-eighth pin of the control chip U7; the integrated chip The seventh pin of U8 is grounded through a capacitor C72; the fifth pin of the integrated chip U8 is electrically connected to one end of the capacitor C38 through a resistor R118, and the third pin of the integrated chip U8 is connected to the other end of the capacitor C38 and One end of the inductor L9 is electrically connected, the other end of the inductor L9, one end of the resistor R121, one end of the capacitor C40, and one end of the capacitor C41 are connected to each other and are all connected to a 3.3V power supply;
  • the 4.2VDC—7.2VDC step-down voltage routing is composed of adjustable-buck-switching regulator U8, energy storage inductor L9 and peripheral resistance-capacitance take-off and drop, adjustable-buck-switching stable
  • the voltage converter U8 reduces the battery voltage from 4.2VDC to 7.2VDC to a stable 3.3VDC for system use through a variable PWM frequency.
  • the 4G water meter collector based on M-BUS of the present invention further includes a storage module, and the storage module includes an integrated chip U6;
  • the model of the integrated chip U6 is AT25FS010; the first pin of the integrated chip U6 is electrically connected to the twenty-sixth pin of the control chip U7; the second pin of the integrated chip U6 is connected to the second pin of the control chip U7
  • the twenty-two pins are electrically connected; the third, seventh, and eighth pins of the integrated chip U6 are connected to each other; the fourth pin of the integrated chip U6 is grounded; the fourth pin of the integrated chip U6
  • the five pins are electrically connected to the twenty-third pin of the control chip U7; the sixth pin of the integrated chip U6 is electrically connected to the twenty-first pin of the control chip U7.
  • the 4G water meter collector based on M-BUS of the present invention also includes a buzzer module, which includes a resistor R70, a resistor R73, a transistor Q13 and a buzzer BL1;
  • the resistance of resistor R70 is 1K ⁇ ; the resistance of resistor R73 is 10K ⁇ ; the model of transistor Q13 is 9013; the model of buzzer BL1 is TMB9.5A (3V).
  • One end of the resistor R70 is electrically connected to the twenty-seventh pin of the control chip U7; the other end of the resistor R70 is electrically connected to one end of the resistor R73 and the base of the transistor Q13, and the other end of the resistor R73 is electrically connected to the base of the transistor Q13.
  • the emitter of the transistor Q13 is electrically connected and grounded, the collector of the transistor Q13 is electrically connected to one end of the buzzer BL1, and the other end of the buzzer BL1 is connected to a 3.3V power supply.
  • the 4G water meter collector based on M-BUS of the present invention also includes a temperature sensing module, which includes a capacitor C24, a capacitor C25, a resistor R55 and a thermistor RT1;
  • the capacitance value of the capacitor C24 and the capacitor C25 is 0.1 ⁇ F; the resistance value of the resistor R55 is 10K ⁇ ; the resistance value of the thermistor RT1 is 10K ⁇ .
  • One end of the capacitor C24 is electrically connected to one end of the resistor R55 and the third pin of the integrated chip U6, and the other end of the capacitor C24, one end of the thermistor RT1 and one end of the capacitor C25 are all grounded;
  • the other end of the resistor R55, the other end of the thermistor RT1 and the other end of the capacitor C25 are connected to each other and are electrically connected to the 34th pin of the control chip U7.
  • temperature sampling through the thermistor RT1 facilitates monitoring of the ambient temperature of the water meter collector, so as to better protect the water meter collector and ensure the stability during the data collection process.
  • the M-BUS-based 4G water meter collector of the present invention also includes an indicator module, which includes light-emitting diodes LED1, light-emitting diodes LED2, light-emitting diodes LED3, light-emitting diodes LED4, light-emitting diodes LED5, and light-emitting diodes.
  • LED6 light-emitting diode LED7, resistor R66, resistor R74, resistor R79, MOS tube Q14, resistor R75, resistor R76 and resistor R77;
  • the models of light-emitting diode LED1, light-emitting diode LED2, light-emitting diode LED3, light-emitting diode LED4, light-emitting diode LED5, light-emitting diode LED6 and light-emitting diode LED7 are all LED-0805;
  • the resistance value of resistor R66 is 330R;
  • the resistance value of resistor R74 is The resistance value of the resistor R79 is 1M ⁇ ;
  • the model of the MOS tube Q14 is 2302;
  • the resistance values of the resistor R75, the resistor R76 and the resistor R77 are all 330R;
  • the anode of the light emitting diode LED1 is electrically connected to the 54th pin of the control chip U7; the anode of the light emitting diode LED2 is electrically connected to the 55th pin of the control chip U7; the anode of the light emitting diode LED3 is electrically connected to The 56th pin of the control chip U7 is electrically connected; the anode of the light emitting diode LED4 is electrically connected to the 57th pin of the control chip U7; the cathode of the light emitting diode LED1, the cathode of the light emitting diode LED2, The cathode of the light emitting diode LED3 and the cathode of the light emitting diode LED4 are connected to each other and electrically connected to one end of the resistor R66, the other end of the resistor R66 is electrically connected to the drain of the MOS transistor Q14, and the gate of the MOS transistor Q14
  • the electrodes are respectively electrically connected to one end of the
  • the other end of the resistor R74 is electrically connected to the 51st pin of the control chip U7.
  • the other end of the resistor R79 is electrically connected to the source of the MOS transistor Q14. Electrically connected and grounded; the anode of the light-emitting diode LED5, the anode of the light-emitting diode LED6 and the anode of the light-emitting diode LED7 are all connected to a 3.3V power supply, and the cathode of the light-emitting diode LED5 is connected to the fiftieth lead of the control chip U7 through a resistor R75
  • the cathode of the light-emitting diode LED6 is electrically connected to the fifty-second pin of the control chip U7 through a resistor R76, and the cathode of the light-emitting diode LED7 is electrically connected to the fifty-third pin of the control chip U7 through a resistor R77. connection.
  • multiple light-emitting diodes can indicate a variety of use states, such as charging state, power loss state, normal state, abnormal state, data collection state, etc., so that the operator can quickly learn about the water meter collector The current state of.
  • the present invention also provides the peripheral circuit design of the 4G water meter collector based on M-BUS.
  • Figure 21 is the circuit connection diagram of the transceiver. The specific parameters of the electronic components in the figure are as follows:
  • the model of diode D4 is SMB-SS34, the resistance of resistors R14 and R24 is 100 ⁇ , the resistance of resistor R19 is 2.2K ⁇ , the resistance of resistors R11 and R26 is 4.7K ⁇ , the model of integrated chip U2 is MAX3430, the resistance The resistance value of R6 and resistor R3 is 10K ⁇ , the resistance value of resistors R4 and R27 is 100K ⁇ , the model of transistor Q3 is 9013, the resistance value of resistor R30 is 33K ⁇ , and the model of diodes D5 and D10 is 1N4148.
  • Figure 22 is a circuit connection diagram of the 7.2V battery power detection circuit of the present invention. the specific parameters of each electronic component in the figure are as follows:
  • the resistance value of the resistor R67 and the resistance R81 is 1M ⁇
  • the resistance value of the resistance R72 is 1K ⁇
  • the resistance value of the resistance R68 is 680K ⁇
  • the resistance value of the resistance R68 is 10K ⁇
  • the resistance value of the resistance R71 is 100K ⁇
  • the resistance value of the resistance R78 and R133 The value is 10K ⁇
  • the model of the transistor Q12 is 2301
  • the model of the transistor Q15 is 2302
  • the capacitors C42, C78 and C77 are all 0.1 ⁇ F.
  • FIG. 23 is a circuit connection diagram of the switching regulator circuit of the present invention. the specific parameters of each electronic component in the figure are as follows:
  • the capacitance value of the capacitors C64, C63, C65, C53 is 0.1 ⁇ F; the capacitance value of the ceramic capacitor E11 is 22 ⁇ F and the voltage value is 20V; the resistance value of the resistor R96 is 1M ⁇ , the model of the integrated chip U11 is MP2233, and the resistance of the resistor R86
  • the value is 20R, the resistance value of the resistor R94 is 24K ⁇ , the resistance value of the resistor R104 is 1K ⁇ , the resistance value of the resistor R102 is 4.02K ⁇ , the capacitance value of the capacitor C60 is 15pF, the inductance value of the inductor L8 is 1.5 ⁇ H, and the resistance value of the resistor R95
  • the value is 10R, and the capacitance value of capacitor C61 is 1 ⁇ F.
  • Figure 24 is a circuit connection diagram of the 485 communication circuit of the present invention. the specific parameters of each electronic component in the figure are as follows:
  • the resistance value of resistors R36 and R39 is 1M ⁇
  • the resistance value of resistor R38 is 4.7K ⁇
  • the resistance value of resistor R41 is 100K ⁇
  • the model of transistor Q6 is 2302
  • the resistance value of resistors R45 and R47 is 10K ⁇
  • the capacitance of capacitors C20 and C21 The value is 0.1 ⁇ F
  • the resistance of resistor R43 is 1K ⁇ .
  • Figure 25 is a circuit connection diagram of the reset circuit of the present invention; the specific parameters of each electronic component in the figure are: the resistance value of the resistor R61 is 10K ⁇ , and the capacitance value of the capacitor C30 is 0.1 ⁇ F. Through the circuit connection of Figure 25 and the parameter coordination of various electronic components, the reset function is realized.
  • FIG. 26 is a connection diagram of the battery charging overvoltage protection circuit of the present invention.
  • the specific parameters of each electronic component in the figure are as follows:
  • resistors R44 and R46 are 2A
  • the model of Z1 is BA201N
  • the model of ZD2 is SMBJ36.
  • Figure 27 is the connection diagram of the ⁇ -type low-pass filter circuit at the power supply terminal of the MCU of the present invention.
  • the capacitance value of the capacitors C28 and C29 is 100nF
  • the capacitance value of the ceramic capacitor E2 is 10 ⁇ F
  • the voltage value is 16V
  • the capacitance value of the ceramic capacitor E3 is 100 ⁇ F
  • the voltage value is 10V
  • the inductances L5 and L6 are both 120R.
  • Figure 28 is a circuit connection diagram of the program download interface circuit of the present invention; under the specific parameters of each electronic component in the figure: the capacitance value of the capacitor C23 is 100 nF, and the resistance values of the resistors R50 and R51 are both 10K ⁇ .
  • the program download function is realized.
  • Figure 29 is a circuit connection diagram of the memory power supply control output circuit of the present invention. the specific parameters of each electronic component in the figure are as follows:
  • the resistance value of resistor R49 is 47K ⁇
  • the resistance value of resistor R53 is 4.7K ⁇
  • the capacitance value of capacitor C22 is 100nF
  • the capacitance value of ceramic capacitor E1 is 22 ⁇ F
  • the model of MOS tube Q7 is 2301.
  • the M-BUS receiving circuit provided by the present invention is arranged between the control unit and the M-BUS over-current protection circuit and used to connect the control unit and the M-BUS over-current protection circuit.
  • the receiving circuit is composed of adjustable regulated power supply LM317, Schmitt trigger CD4093, comparator LM393, transistor Q2, transistor Q4, diode D2, diode D8, diode D9, diode D10, diode D1 and several resistance-capacitance circuits.
  • the system passes Boost 12VDC to 32VDC voltage through adjustable regulated power supply U1 to adjust the voltage to ⁇ 15VDC, the voltage regulator tube will reduce the voltage to 7.5VDC, and then through the first pin of comparator U3 output high level input to the second comparator IN -1.5VDC between pin and IN+ pin, output low level at pin 7 to trigger Schmitt trigger to receive MBUS communication data.
  • the base of the transistor Q2 is controlled by the single-chip microcomputer to enable the Schmitt trigger. When it needs to receive MBUS data, this pin will be enabled.
  • the transistor Q4 is the ADJ pin of the regulator U1 to control the adjustment voltage at about 15VDC.
  • the diode D2 and the capacitor isolate the 32VDC voltage, that is, when the input 12VDC power supply fluctuates, it will not affect the MBUS communication within the mS level.
  • the diode D10 isolates the signal of the second pin of the comparator from the diode D8 and the diode D9
  • a limiter circuit is formed to prevent the comparator from entering the zero-crossing comparison; the diode D1 is connected to the input pin and the ground pin of the voltage stabilizer U1 to prevent the protection voltage signal from being connected to damage the effect of the voltage stabilizer U1. Therefore, the M-BUS receiving circuit provided by the present invention can greatly improve the signal-to-noise ratio, and the reliability and stability are significantly improved.
  • the 4G water meter collector based on M-BUS can effectively improve the stability of water meter data collection.
  • the above-mentioned power supply module structure solves the problem of difficulty in obtaining power from the collector. By using power consumption technology, the standby current of the power supply is less than 0.3 ⁇ A, which can supply power for a long time, making it possible to break through the constraints of difficult on-site power obtaining.
  • the above-mentioned 4G communication module structure solves the problem of the slow speed of the collector network, which is 30-18000 times the speed of the existing GRPS and CDMA network.
  • the above-mentioned bluetooth module structure solves the problem that the near-end communication interface of the collector needs a connection line and is easy to contact poorly.
  • the collector has a built-in bluetooth module, which can be operated by Bluetooth connection through the mobile phone APP.

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Abstract

一种M-BUS接收电路(8)和基于M-BUS的4G水表采集器。其中M-BUS接收电路(8)设置在控制单元(2)和M-BUS过流保护电路之间且用于连接控制单元(2)和M-BUS过流保护电路,M-BUS接收电路(8)由稳压芯片U1、施密特触发器U5B和U5C、电压比较器U3A和U3B、三极管Q2和Q4、二极管D1、D2、D8-D11、运算放大器U15A和U15B、稳压二极管ZW10和ZW11、若干阻容电路构成。该M-BUS接收电路(8)可大幅提高信噪比,可靠性和稳定性明显提高。同理,基于M-BUS的4G水表采集器,能够有效提高水表数据采集的稳定性。

Description

M-BUS接收电路和基于M-BUS的4G水表采集器 技术领域
本发明涉及数据采集器技术领域,尤其涉及一种M-BUS接收电路和基于M-BUS的4G水表采集器。
背景技术
目前市场上的远程水表大都是将同一楼层的多个水表的信息传送到水表采集器上,再经水表采集器将收集起来的数据上传至计算机管理系统上,完成远程抄表工作。但现有的水表采集器多采用M-BUS芯片进行供电和数据传输,在实际使用中发现,采用M-BUS芯片的水表采集器的水表通讯接口供电不稳定,信噪比也比较低,稳定性低的水表采集器在使用上多有不便。
技术问题
本发明所要解决的技术问题是:提供一种可大幅提高信噪比,实现数据接收稳定性高的M-BUS接收电路和基于M-BUS的4G水表采集器。
技术解决方案
为了解决上述技术问题,本发明采用的一种技术方案为:
一种M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,所述M-BUS接收电路包括电容C3、电容C2、稳压芯片U1、二极管D1、电阻R16、电阻R10、电阻R8、电阻R17、电容C9、电阻R9、电阻R21、电阻R22、三极管Q4、施密特触发器U5C、电阻R124、电阻R105、三极管Q2、电阻R12、电阻R103、电阻R33、施密特触发器U5B、电压比较器U3B、电阻R32、电阻R34、电容C75、电阻R15、二极管D2、电阻R117、电容C7、电容C5、电容C8、电容C10、电压比较器U3A、电阻R29、二极管D8、二极管D9、二极管D10、二极管D11、电容C15、电容C16、电容C17、电容C81、电容C6、电阻R18、电阻R20、电阻R205、电阻R203、电阻R204、电阻R201、电阻R202、电阻R7、电容C202、电容C200、电容C201、电容C203、电容C4、运算放大器U15A、稳压二极管ZW10、稳压二极管ZW11和运算放大器U15B;
所述电容C3和电容C2并联连接,所述电容C3和电容C2并联后的一端接地,所述电容C3和电容C2并联后的另一端与稳压芯片U1的第三引脚均与32V电源电连接;所述二极管D1的负极与稳压芯片U1的第三引脚电连接,所述二极管D1的正极与稳压芯片U1的第二引脚电连接;所述稳压芯片U1的第二引脚分别电阻R10的一端和电阻R8的一端电连接,所述电阻R10的另一端分别与稳压芯片U1的第一引脚、电阻R16的一端、电容C9的一端和电阻R17的一端电连接,所述电阻R16的另一端与三极管Q4的集电极电连接,所述三极管Q4的基极与电阻R22的一端电连接,所述电阻R22的另一端分别与电阻R9的一端、施密特触发器U5C的输出端和电阻R21的一端电连接,所述电阻R9的另一端接3.3V电源,所述施密特触发器U5C的两个输入端相互连接且与控制单元电连接,所述电阻R21的另一端与三极管Q4的发射极电连接且均接地;所述电容C9的另一端、电阻R17的另一端和电阻R8的另一端相互连接且均接地;
所述电阻R124的一端与控制单元电连接,所述电阻R124的另一端分别与电阻R105的一端和三极管Q2的基极电连接,所述电阻R105的另一端与三极管Q2的发射极相互连接且均接地;所述三极管Q2的集电极与电阻R12的一端电连接,所述电阻R12的另一端分别与施密特触发器U5B的一输入端和电阻R103的一端电连接,所述电阻R103的另一端与电阻R33的一端相互连接且均接3.3V电源;所述电阻R33的另一端分别与施密特触发器U5B的另一输入端和电压比较器U3B的输出端电连接,所述施密特触发器U5B的输出端与控制单元电连接;所述电压比较器U3B的正向输入端分别与电阻R32的一端、电阻R34的一端和电容C75的一端电连接,所述电阻R32的一端接3.3V电源,所述电阻R34的另一端和电容C75的另一端相互连接且均接地;所述电压比较器U3B的反向输入端通过电阻R15接3.3V电源;
所述电压比较器U3B的反向输入端分别与电容C8的一端、电容C10的一端和电压比较器U3A的输出端电连接,所述电容C10的另一端接地,所述电容C8的另一端分别与电压比较器U3A的正向输入端、二极管D8的正极、二极管D10的负极和电阻R18的一端电连接;所述电压比较器U3A的反向输入端分别与电阻R29的一端、二极管D8的负极、二极管D9的正极、电容C15的一端、电容C16的一端、电容C17的一端、电容C81的一端和电阻R20的一端电连接,所述电阻R29的另一端、电容C15的另一端、电容C16的另一端、电容C17的另一端和电容C81的另一端相互连接且均接地;所述二极管D9的负极与二极管D10的正极电连接,所述电阻R20的另一端分别与二极管D11的负极和电容C6的一端电连接,所述电容C6的另一端接地,所述二极管D11的正极和电阻R18的另一端均与运算放大器U15B的输出端电连接;
所述运算放大器U15B的反向输入端与运算放大器U15B的输出端电连接,所述运算放大器U15B的正向输入端分别与运算放大器U15A的输出端、电容C202的一端和电阻R205的一端电连接;所述电容C202的另一端、电阻R205的另一端、电容C200的一端和电阻R203的一端均与运算放大器U15A的反向输入端电连接,所述电容C200的另一端接地,所述电阻R203的另一端分别与电阻R201的一端和稳压二极管ZW10的正极电连接,所述电阻R201的另一端接地,所述稳压二极管ZW10的负极分别与稳压芯片U1的第二引脚和电阻R7的一端电连接,所述电阻R7的另一端分别与稳压二极管ZW11的负极、电容C4的一端和M-BUS过流保护电路电连接;所述稳压二极管ZW11的正极分别与电阻R202的一端和电阻R204的一端电连接,所述电阻R202的另一端接地,所述电阻R204的另一端分别与电容C201的一端和运算放大器U15A的正向输入端电连接,所述电容C201的另一端接地,所述运算放大器U15A的电源端通过电容C203后接地;
所述二极管D2的正极接32V电源,所述二极管D2的负极分别与电阻R117的一端和电容C7的一端电连接,所述电阻R117的另一端与电容C5的一端电连接,所述电容C7的另一端和电容C5的另一端相互连接且均接地。
本发明采用的另一种技术方案为:
一种基于M-BUS的4G水表采集器,包括电源模块、控制单元、4G通讯模块、蓝牙通讯模块、SIM卡电路、水表通讯接口、天线、防雷电路和上述的M-BUS接收电路;
所述电源模块分别与控制单元和4G通讯模块电连接,所述控制单元分别与SIM卡电路、蓝牙通讯模块和M-BUS接收电路电连接,所述4G通讯模块与天线电连接,所述M-BUS接收电路与水表通讯接口电连接,所述水表通讯接口与防雷电路电连接。
有益效果
本发明的有益效果在于:
本发明提供的M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,其中M-BUS接收电路由可调稳压电源LM317、施密特触发器CD4093、比较器LM393、三极管Q2、三极管Q4、二极管D2、二极管D8、二极管D9、二极管D10、二极管D1及若干阻容电路构成,系统通过12VDC升压至32VDC电压通过可调稳压电源U1将电压调整为±15VDC,由稳压管将电压降为7.5VDC,再通过比较器U3第一脚输出高电平输入到第二比较器IN-管脚与IN+管脚的1.5VDC,在第7脚输出低电平触发施密特触发器接收MBUS通讯数据。三极管Q2基极受单片机控制使能施密特触发器,在需要接收MBUS数据时,该引脚将被使能,三极管Q4为调整稳压器U1的ADJ引脚控制调整电压在15VDC左右,二极管D2与电容将32VDC电压进行隔离,即在输入12VDC电源在有波动时,不会在mS等级的时间内影响MBUS通讯,二极管D10将比较器第2引脚的信号进行隔离与二极管D8,二极管D9组成限幅电路,防止比较器进入过零比较;二极管D1接在稳压器U1的输入脚和接地脚,防止保护电压信号接反而损坏稳压器U1的效果。因此,本发明提供的M-BUS接收电路可大幅提高信噪比,可靠性和稳定性明显提高。同理,本发明还提供的基于M-BUS的4G水表采集器,能够有效提高水表数据采集的稳定性。
附图说明
图1为本发明的M-BUS接收电路的电路连接图;
图2为本发明的控制单元的电路连接图;
图3为本发明的基于M-BUS的4G水表采集器的模块连接图;
图4为本发明的电源模块的电路连接图;
图5为本发明的4G通讯模块的电路连接图;
图6为本发明的SIM卡电路的电路连接图;
图7为本发明的蓝牙通讯模块的电路连接图;
图8为本发明的水表通讯接口的电路连接图;
图9为本发明的防雷电路的第一分支电路的电路连接图;
图10为本发明的防雷电路的第二分支电路的电路连接图;
图11为本发明的防雷电路的第三分支电路的电路连接图;
图12为本发明的防雷电路的第四分支电路的电路连接图;
图13为本发明的防雷电路的第五分支电路的电路连接图;
图14为本发明的过流保护电路的电路连接图;
图15为本发明的M-BUS电源电路的12VDC-32VDC的电路连接图;
图16为本发明的M-BUS电源电路的4.2VDC-7.2VDC的电路连接图;
图17为本发明的存储模块的电路连接图;
图18为本发明的蜂鸣器模块的电路连接图;
图19为本发明的温度感应模块的电路连接图;
图20为本发明的指示灯模块的电路连接图;
图21为本发明的收发器的电路连接图;
图22为本发明的7.2V电池电量检测电路的电路连接图;
图23为本发明的开关式稳压电路的电路连接图;
图24为本发明的485通讯电路的电路连接图;
图25为本发明的复位电路的电路连接图;
图26为本发明的电池充电过压保护电路连接图;
图27为本发明的MCU供电端π型低通滤波电路连接图;
图28为本发明的程序下载接口电路的电路连接图;
图29为本发明的存储器电源控制输出电路的电路连接图;
标号说明:
1、电源模块;2、控制单元;3、蓝牙通讯模块;4、4G通讯模块;5、SIM卡电路;6、防雷电路;7、水表通讯接口;8、M-BUS接收模块;9、M-BUS电源电路;10、RS-485通讯接口电路;11、天线。
本发明的实施方式
为详细说明本发明的技术内容、所实现目的及效果,以下结合实施方式并配合附图予以说明。
请参照图1至图29,具体如图1,本发明提供的一种M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,所述M-BUS接收电路包括电容C3、电容C2、稳压芯片U1、二极管D1、电阻R16、电阻R10、电阻R8、电阻R17、电容C9、电阻R9、电阻R21、电阻R22、三极管Q4、施密特触发器U5C、电阻R124、电阻R105、三极管Q2、电阻R12、电阻R103、电阻R33、施密特触发器U5B、电压比较器U3B、电阻R32、电阻R34、电容C75、电阻R15、二极管D2、电阻R117、电容C7、电容C5、电容C8、电容C10、电压比较器U3A、电阻R29、二极管D8、二极管D9、二极管D10、二极管D11、电容C15、电容C16、电容C17、电容C81、电容C6、电阻R18、电阻R20、电阻R205、电阻R203、电阻R204、电阻R201、电阻R202、电阻R7、电容C202、电容C200、电容C201、电容C203、电容C4、运算放大器U15A、稳压二极管ZW10、稳压二极管ZW11和运算放大器U15B;
其中,电容C3的电容值为0.1uF;电容C2的电容值为0.01uF;稳压芯片U1的型号为LM317AMDT;二极管D1的型号为SS16;电阻R16的阻值为2.4KΩ;电阻R10的阻值为160Ω;电阻R8的阻值为5.1KΩ;电阻R17的阻值为1MΩ;电容C9的电容值为0.01uF;电阻R9的阻值为1MΩ;电阻R21的阻值为10KΩ;电阻R22的阻值为1KΩ;三极管Q4的型号为MMBT5551;施密特触发器U5C的型号为4093;电阻R124的阻值为1KΩ;电阻R105的阻值为1KΩ;三极管Q2的型号为MMBT5551;电阻R12的阻值为1KΩ;电阻R103的阻值为100Ω;电阻R33的阻值为1KΩ;施密特触发器U5B的型号为4093;电压比较器U3B的型号为LM393A;电阻R32的阻值为10KΩ;电阻R34的阻值为10KΩ;电容C75的电容值为0.1uF;电阻R15的阻值为1KΩ;二极管D2的型号为1N4148;电阻R117的阻值为100Ω;电容C7的电容值为0.1uF;电容C5的电容值为4.7uF;电容C8的电容值为39pF;电容C10的电容值为0.001uF;电压比较器U3A的型号为LM393A;电阻R29的阻值为3MΩ;二极管D8、二极管D9和二极管D10的型号均为1N4148;二极管D11的型号为BAT41ZFILM;电容C15、电容C16、电容C17和电容C81的电容值均为4.7uF;电容C6的电容值为1000pF;电阻R18、电阻R20的阻值均为4.7KΩ;电阻R205的阻值为33KΩ;电阻R203、电阻R204的阻值均为1KΩ;电阻R201、电阻R202的阻值为5.1KΩ,精度为1%;电阻R7的阻值为2Ω,瓦数为5W;电容C202的电容值为39pF,电压值为50V;电容C200、电容C201、电容C203的电容值均为0.1μF,电压值均为50V;电容C4的电容值为0.22μF,电压值为50V;运算放大器U15A和运算放大器U15B的型号均为LM258;稳压二极管ZW10和稳压二极管ZW11的型号均为ZMM2V4。
所述电容C3和电容C2并联连接,所述电容C3和电容C2并联后的一端接地,所述电容C3和电容C2并联后的另一端与稳压芯片U1的第三引脚均与32V电源电连接;所述二极管D1的负极与稳压芯片U1的第三引脚电连接,所述二极管D1的正极与稳压芯片U1的第二引脚电连接;所述稳压芯片U1的第二引脚分别电阻R10的一端和电阻R8的一端电连接,所述电阻R10的另一端分别与稳压芯片U1的第一引脚、电阻R16的一端、电容C9的一端和电阻R17的一端电连接,所述电阻R16的另一端与三极管Q4的集电极电连接,所述三极管Q4的基极与电阻R22的一端电连接,所述电阻R22的另一端分别与电阻R9的一端、施密特触发器U5C的输出端和电阻R21的一端电连接,所述电阻R9的另一端接3.3V电源,所述施密特触发器U5C的两个输入端相互连接且与控制单元电连接,所述电阻R21的另一端与三极管Q4的发射极电连接且均接地;所述电容C9的另一端、电阻R17的另一端和电阻R8的另一端相互连接且均接地;
所述电阻R124的一端与控制单元电连接,所述电阻R124的另一端分别与电阻R105的一端和三极管Q2的基极电连接,所述电阻R105的另一端与三极管Q2的发射极相互连接且均接地;所述三极管Q2的集电极与电阻R12的一端电连接,所述电阻R12的另一端分别与施密特触发器U5B的一输入端和电阻R103的一端电连接,所述电阻R103的另一端与电阻R33的一端相互连接且均接3.3V电源;所述电阻R33的另一端分别与施密特触发器U5B的另一输入端和电压比较器U3B的输出端电连接,所述施密特触发器U5B的输出端与控制单元电连接;所述电压比较器U3B的正向输入端分别与电阻R32的一端、电阻R34的一端和电容C75的一端电连接,所述电阻R32的一端接3.3V电源,所述电阻R34的另一端和电容C75的另一端相互连接且均接地;所述电压比较器U3B的反向输入端通过电阻R15接3.3V电源;
所述电压比较器U3B的反向输入端分别与电容C8的一端、电容C10的一端和电压比较器U3A的输出端电连接,所述电容C10的另一端接地,所述电容C8的另一端分别与电压比较器U3A的正向输入端、二极管D8的正极、二极管D10的负极和电阻R18的一端电连接;所述电压比较器U3A的反向输入端分别与电阻R29的一端、二极管D8的负极、二极管D9的正极、电容C15的一端、电容C16的一端、电容C17的一端、电容C81的一端和电阻R20的一端电连接,所述电阻R29的另一端、电容C15的另一端、电容C16的另一端、电容C17的另一端和电容C81的另一端相互连接且均接地;所述二极管D9的负极与二极管D10的正极电连接,所述电阻R20的另一端分别与二极管D11的负极和电容C6的一端电连接,所述电容C6的另一端接地,所述二极管D11的正极和电阻R18的另一端均与运算放大器U15B的输出端电连接;
所述运算放大器U15B的反向输入端与运算放大器U15B的输出端电连接,所述运算放大器U15B的正向输入端分别与运算放大器U15A的输出端、电容C202的一端和电阻R205的一端电连接;所述电容C202的另一端、电阻R205的另一端、电容C200的一端和电阻R203的一端均与运算放大器U15A的反向输入端电连接,所述电容C200的另一端接地,所述电阻R203的另一端分别与电阻R201的一端和稳压二极管ZW10的正极电连接,所述电阻R201的另一端接地,所述稳压二极管ZW10的负极分别与稳压芯片U1的第二引脚和电阻R7的一端电连接,所述电阻R7的另一端分别与稳压二极管ZW11的负极、电容C4的一端和M-BUS过流保护电路电连接;所述稳压二极管ZW11的正极分别与电阻R202的一端和电阻R204的一端电连接,所述电阻R202的另一端接地,所述电阻R204的另一端分别与电容C201的一端和运算放大器U15A的正向输入端电连接,所述电容C201的另一端接地,所述运算放大器U15A的电源端通过电容C203后接地;
所述二极管D2的正极接32V电源,所述二极管D2的负极分别与电阻R117的一端和电容C7的一端电连接,所述电阻R117的另一端与电容C5的一端电连接,所述电容C7的另一端和电容C5的另一端相互连接且均接地。
本发明的技术效果为:
本发明提供的M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,其中M-BUS接收电路由可调稳压电源LM317、施密特触发器CD4093、比较器LM393、三极管Q2、三极管Q4、二极管D2、二极管D8、二极管D9、二极管D10、二极管D1及若干阻容电路构成,系统通过12VDC升压至32VDC电压通过可调稳压电源U1将电压调整为±15VDC,由稳压管将电压降为7.5VDC,再通过比较器U3第一脚输出高电平输入到第二比较器IN-管脚与IN+管脚的1.5VDC,在第7脚输出低电平触发施密特触发器接收MBUS通讯数据。三极管Q2基极受单片机控制使能施密特触发器,在需要接收MBUS数据时,该引脚将被使能,三极管Q4为调整稳压器U1的ADJ引脚控制调整电压在15VDC左右,二极管D2与电容将32VDC电压进行隔离,即在输入12VDC电源在有波动时,不会在mS等级的时间内影响MBUS通讯,二极管D10将比较器第2引脚的信号进行隔离与二极管D8,二极管D9组成限幅电路,防止比较器进入过零比较;二极管D1接在稳压器U1的输入脚和接地脚,防止保护电压信号接反而损坏稳压器U1的效果。因此,本发明提供的M-BUS接收电路可大幅提高信噪比,可靠性和稳定性明显提高。
参阅图2,所述控制单元包括型号为STM32L15xRC的控制芯片U7,所述施密特触发器U5C的两个输入端均与控制芯片U7的第二十九引脚(标号为USART3_TX)电连接,所述电阻R124的一端与控制芯片U7的第五十九引脚(标号为EN1)电连接,所述施密特触发器U5B的输出端与控制芯片U7的第三十引脚(标号为USART3_RX)电连接。图2中各电子元器件的具体参数如下:
电阻R134的阻值为1MΩ,电阻R135、R52、R69、R63的阻值为10KΩ,MOS管的型号为2301,SL1的型号为SL353LT。电容C26、C32、C43的电容值为0.1μF,电阻R59的阻值为1KΩ;电容C31、C33的电容值为12pF;晶振器X1的晶振频率为32.768K。
上述的控制单元由一单片机芯片U7、各个旁路电容、各个控制电容、各个控制电阻及晶振、通讯接口组成,电容C26与单片机VDD_1电源引脚连接,电容C32与单片机VDD_2电源引脚连接,电容C30与电阻R61与单片机芯片的RST引脚连接组成复位电路,晶振器的一端与单片机芯片的OSC32_OUT引脚连接同时接至电容C31,另一端与与单片机芯片的OSC32_IN引脚连接同时接至电容C33组成振荡电路,提供32.768kHz的时钟频率。
参阅图3,本发明还提供的一种基于M-BUS的4G水表采集器,包括电源模块1、控制单元2、4G通讯模块4、蓝牙通讯模块3、SIM卡电路5、水表通讯接口7、天线11、防雷电路6和上述的M-BUS接收电路8;
所述电源模块1分别与控制单元2和4G通讯模块4电连接,所述控制单元2分别与SIM卡电路5、蓝牙通讯模块3和M-BUS接收电路8电连接,所述4G通讯模块4与天线11电连接,所述M-BUS接收电路8与水表通讯接口7电连接,所述水表通讯接口7与防雷电路6电连接。
同理,本发明提供的基于M-BUS的4G水表采集器,能够有效提高水表数据采集的稳定性。
参阅图4,所述电源模块包括电感J0、电感L1、电感L2、电感L3、电感L4、二极管D15、电阻RP1、稳压管ZD1、插接口J2、MOS管Q5、电阻R35、电阻R37、电阻R40、电阻R42、电容C19、稳压芯片U9、电容C34、电容C35、瓷片电容E4、瓷片电容E5、电容C36和电容C37;
其中,电感J0的标称为0R;电感L1、电感L2、电感L3、电感L4的标称均为220R/1A;二极管D15的型号为SS34;电阻RP1的型号为PTC GP250-3A;稳压管ZD1的型号为SMBJ15;插接口J2的型号为Component_1;MOS管Q5的型号为2302;电阻R35的阻值为4.7KΩ;电阻R37的阻值为100KΩ;电阻R40的阻值为1MΩ;电阻R42的阻值为1MΩ;电容C19的电容值为0.1uF;稳压芯片U9的型号为S-812C33;电容C34的电容值为200μF,电压值为25V;电容C35的电容值为100nF;瓷片电容E4和瓷片电容E5的电容值为22μF;电容C36的电容值为100nF;电容C37的电容值为0.22F。
所述电感J0的一端与电池+BAT电连接,所述电感J0的另一端与二极管D15的负极电连接,所述二极管D15的正极分别与电感L1的一端、电感L2的一端和电阻R42的一端电连接,所述电感L1的另一端分别与电感L2的另一端、电阻RP1的一端和稳压管ZD1的一端电连接,所述电阻RP1的另一端与插接口J2的第一引脚电连接,所述稳压管ZD1的另一端分别与插接口J2的第二引脚、插接口J2的第三引脚、电感L3的一端和电感L4的一端电连接;所述电感L3的另一端和电感L4的另一端相互连接且均接地;所述电阻R42的另一端分别与MOS管Q5的栅极、电阻R40的一端和电容C19的一端电连接;所述电阻R40的另一端、电容C19的另一端和电阻R37的一端相互连接且均接地;所述电阻R37的另一端分别与电阻R35的一端和控制芯片U7的第三十八引脚电连接,所述电阻R35的另一端与MOS管Q5的源极电连接,所述MOS管Q5的漏极接3.3V电源;
所述稳压芯片U9的第二引脚、电容C34的一端、电容C35的一端和瓷片电容E4的一端相互连接且均与电池+BAT电连接,所述稳压芯片U9的第三引脚、瓷片电容E5的一端、电容C36的一端和电容C37的一端相互连接且均接3.3V电源,所述电容C34的另一端、电容C35的另一端、瓷片电容E4的另一端、稳压芯片U9的第一引脚、瓷片电容E5的另一端、电容C36的另一端和电容C37的另一端相互连接且均接地。
上述的电源模块由电感L1、电感L2、电感L3、电感L4、二极管ZD1、二极管D15、开关管Q5、电阻R35、电阻R37、电阻R40、电阻R42及接插口Component_1组成,用于给各控制单元提供电压信号,其中,接插口Component_1与电阻RP1的一端连接,接插口Component_1与电感L3、电感L4、二极管ZD1连接并接地,电阻RP1的另一端与电感L1、电感L2、电感L3、电感L4、二极管ZD1连接组成过压及滤波电路,开关管Q5、电阻R35、电阻R37、电阻R40、电阻R42组成电压控制电路。通过上述结构解决采集器现场取电难的问题,通过采用功耗技术,电源的待机电流<0.3μA,可长时间供电,使突破现场取电难的制约成为可能。
参阅图5,所述4G通讯模块包括集成芯片GSM1、电容C46、电容C47、电容C48、电容C49、瓷片电容E8、瓷片电容E9、稳压二极管Z6、电阻R100、三极管Q19、二极管D22、二极管D23、电阻R106、电阻R114、电阻R88、电容C54和电容C55;
其中,电容C46的电容值为10pF;电容C47的电容值为33pF;电容C48的电容值为100nF;电容C49的电容值为0.022μF;瓷片电容E8的电容值为22μF;瓷片电容E9的电容值为220μF,电压值为25V;稳压二极管Z6的型号为ZMM5V1ST;电阻R100的阻值为1KΩ;三极管Q19的型号为9013;二极管D22和二极管D23的型号为1N4148;电阻R106、电阻R114的阻值为10KΩ;电阻R88的阻值为0R。
所述集成芯片GSM1的型号为M26FA-03-STD,所述电容C46的一端、电容C47的一端、电容C48的一端、电容C49的一端、瓷片电容E8的一端、瓷片电容E9的一端和稳压二极管Z6的负极相互连接且均与集成芯片GSM1的第四十二引脚以及第四十三引脚电连接;所述电容C46的另一端、电容C47的另一端、电容C48的另一端、电容C49的另一端、瓷片电容E8的另一端、瓷片电容E9的另一端和稳压二极管Z6的正极相互连接且均接地;
所述三极管Q19的基极通过电阻R100与控制芯片U7的第十五引脚电连接,所述三极管Q19的集电极与集成芯片GSM1的第七引脚电连接,所述三极管Q19的发射极接地;
所述集成芯片GSM1的第十一引脚、第十二引脚、第十三引脚和第十四引脚分别与SIM卡电路电连接;
所述集成芯片GSM1的第十七引脚分别与二极管D23的正极和电阻R114的一端电连接,所述二极管D23的负极与控制芯片U7的第十六引脚电连接,所述电阻R114的另一端与集成芯片GSM1的第二十四引脚电连接;所述集成芯片GSM1的第十八引脚与二极管D22的正极电连接,所述二极管D22的负极分别与电阻R106的一端和控制芯片U7的第十七引脚电连接,所述电阻R106的另一端接地;所述集成芯片GSM1的第三十五引脚分别与电阻R88的一端和电容C54的一端电连接,所述电容C54的另一端接地,所述电阻R88的另一端分别与电容C55的一端和IPEX天线接口电连接,所述IPEX天线接口与天线电连接,所述电容C55的另一端接地。
上述的4G通讯模块由模块芯片GSM1、电容C46、电容C47、电容C48、电容E8、电容E9、电容C49、电容C54、电容C55、天线J13、电容C68、电容C69、电容C70、电容C71、二极管Z6、二极管D22、二极管D23、三极管Q19、电阻R106、电阻R88、电阻R100、电阻R114、电阻R115、电阻R116和SIM卡及卡槽SIM CARO组成,其中,电容C46、电容C47、电容C48、电容E8、电容E9、电容C49、二极管Z6并联接入蓝牙芯片的VBAT与GND之间。电容C54、电容C55、电阻R88组成天线信号收发电路接至4G芯片RF_AIN引脚完成4G数据接收与发送。三极管Q19、电阻R100组成信号控制开关。二极管D22、二极管D23组成与4G芯片RXD和TXD引脚连接,组成信号隔离电路。通过上述结构解决采集器网络的速率慢的问题,该采集器是现有GRPS、CDMA网络速率的30-18000倍。
参阅图6,所述SIM卡电路包括集成芯片U13、电阻R115、电阻R116、集成芯片U12、电容C68、电容C69、电容C70和电容C71;
其中,电阻R116的阻值为0R;电容C68的电容值为0.1uF;电容C69、电容C70和电容C71的电容值为22pF。
所述集成芯片U13为M2M-SMD,所述集成芯片U12为SIM-CARD;
所述集成芯片U13的第一引脚和第九引脚接地,所述集成芯片U13的第二引脚通过电阻R115与集成芯片GSM1的第十一引脚电连接,所述集成芯片U13的第三引脚通过电阻R116与集成芯片GSM1的第十一引脚电连接,所述集成芯片U13的第六引脚与集成芯片GSM1的第十三引脚电连接,所述集成芯片U13的第七引脚与集成芯片GSM1的第十二引脚电连接,所述集成芯片U13的第八引脚与集成芯片GSM1的第十四引脚电连接;
所述集成芯片U12的第一引脚分别与集成芯片GSM1的第十四引脚和电容C68的一端电连接,所述集成芯片U12的第二引脚分别与集成芯片GSM1的第十二引脚和电容C69的一端电连接,所述集成芯片U12的第三引脚分别与集成芯片GSM1的第十三引脚和电容C70的一端电连接,所述集成芯片U12的第七引脚分别与集成芯片GSM1的第十一引脚和电容C71的一端电连接,所述集成芯片U12的第五引脚、电容C68的另一端、电容C69的另一端、电容C70的另一端和电容C71的另一端相互连接且均接地。
由上述电路连接关系可知,通过天线J13、电容C68、电容C69、电容C70、电容C71、SIM卡及SIM CARO卡槽相接组成SIM卡槽模块,实现可支持SIM卡通讯。
参阅图7,所述蓝牙通讯模块包括电阻R1、电阻R2、电阻R5、电容C1、MOS管Q1、集成芯片U4、电容C11、电容C12、电阻R13、二极管D6和二极管D7;
其中,电阻R1的阻值为47KΩ;电阻R2的阻值为1KΩ;电阻R5的阻值为4.7KΩ;电容C1的电容值为0.1uF;MOS管Q1的型号为2301;电容C11的电容值为0.1uF;电容C12的电容值为22uF;电阻R13的阻值为10KΩ;二极管D6和二极管D7的型号为1N4148;
所述电阻R1的一端与MOS管Q1的源极电连接且均接3.3V电源;所述电阻R1的另一端分别与MOS管Q1的栅极和电阻R5的一端电连接,所述电阻R5的另一端与控制芯片U7的第三十三引脚电连接;所述MOS管Q1的漏极分别与电容C1的一端和电阻R2的一端电连接,所述电容C1的另一端和电阻R2的另一端均接地;所述MOS管Q1的漏极与电阻R13的一端电连接;
所述电阻R13的另一端分别与集成芯片U4的第十七引脚和二极管D6的正极电连接,所述二极管D6的负极与控制芯片U7的第四十二引脚电连接;所述二极管D7的负极与集成芯片U4的第十六引脚电连接;所述二极管D7的正极与控制芯片U7的第四十三引脚电连接;所述集成芯片U4的第一引脚、第六引脚和第十四引脚均接地;所述集成芯片U4的第二引脚分别与电容C11的一端和电容C12的一端电连接,所述电容C11的另一端和电容C12的另一端均接地。
上述的蓝牙模块由蓝牙控制芯片U4、电容C11、电容C12、电阻R13、二极管D6、二极管D7组成,其中,电容C11、电容C12的一端与蓝牙控制芯片U4的VDD连接,另一端与GND引脚相连接组成旁路电路,二极管D6、二极管D7组成与蓝牙芯片RX和TX引脚连接,组成信号隔离电路。通过上述结构解决采集器近端通讯接口需用连接线且容易接触不良的问题,该采集器内置蓝牙模块,可通过手机APP用蓝牙连接进行操作。
参阅图8,所述水表通讯接口包括电阻R57、MOS管Q9、电阻R62、电阻R58、电容C27、接口J10和接口J11;
其中,电阻R57的阻值为47KΩ;MOS管Q9的型号为2301;电阻R62的阻值为4.7KΩ;电阻R58的阻值为1KΩ;电容C27的电容值为0.1uF;
所述电阻R57的一端与MOS管Q9的源极电连接且均接3.3V电源;所述电阻R57的另一端分别与MOS管Q9的栅极和电阻R62的一端电连接,所述电阻R62的另一端与控制芯片U7的第三十九引脚电连接,所述MOS管Q9的漏极分别与电容C27的一端和电阻R58的一端电连接,所述电容C27的另一端接地,所述电阻R58的另一端接地;
所述接口J10的第一引脚、接口J11的第一引脚和MOS管Q9的漏极相互连接;所述接口J10的第二引脚、接口J11的第二引脚和控制芯片U7的第二十九引脚电连接;所述接口J10的第三引脚、接口J11的第三引脚和控制芯片U7的第三十引脚电连接;所述接口J10的第四引脚接地,所述接口J11的第四引脚接地,所述接口J11的第五引脚接电池+BAT。
由上述电路连接关系可知,水表通讯接口包括接插口J11、电阻R57、电阻R62、电阻R58、电容C27及MOS管Q9组成,其中,电阻R57、电阻R62、电阻R58、电容C27及MOS管Q9组成水表电源控制,实现采集器与水表处于同一电平。
参阅图9-13,所述防雷电路包括第一分支电路、第二分支电路、第三分支电路、第四分支电路和第五分支电路;
具体如图9,所述第一分支电路包括电阻R48、电阻R54、MOS管Q8、二极管D16、继电器RL1、二极管Z2、接口J5和继电器RL5;其中,电阻R48的阻值为10KΩ;电阻R54的阻值为1MΩ;MOS管Q8的型号为2302;二极管D16的型号为1N4148;继电器RL1的型号为HFD4/5;二极管Z2的型号为TVS-Z;继电器RL5的型号为HF42F/05;
所述电阻R48的一端与控制芯片U7的第五十四引脚电连接,所述电阻R48的另一端分别与MOS管Q8的栅极和电阻R54的一端电连接,所述MOS管Q8的源极和电阻R54的另一端均接地;所述MOS管Q8的漏极分别与二极管D16的正极、继电器RL1的第八引脚和继电器RL5的第八引脚电连接,所述二极管D16的负极分别与继电器RL1的第一引脚和继电器RL5的第一引脚电连接,所述继电器RL1的第三引脚与继电器RL5的第六引脚电连接,所述继电器RL1的第六引脚与继电器RL5的第三引脚电连接,所述继电器RL1的第四引脚分别与二极管Z2的一端、接口J5的第一引脚和继电器RL5的第五引脚电连接,所述继电器RL1的第五引脚分别与二极管Z2的另一端、接口J5的第二引脚和继电器RL5的第四引脚电连接;
具体如图10,所述第二分支电路包括电阻R56、电阻R60、MOS管Q10、二极管D17、继电器RL2、二极管Z3、接口J9和继电器RL6;其中,电阻R56的阻值为10KΩ;电阻R60的阻值为1MΩ;MOS管Q10的型号为2302;二极管D17的型号为1N4148;继电器RL2的型号为HFD4/5;二极管Z3的型号为TVS-Z;继电器RL6的型号为HF42F/05;
所述电阻R56的一端与控制芯片U7的第五十五引脚电连接,所述电阻R56的另一端分别与MOS管Q10的栅极和电阻R60的一端电连接,所述MOS管Q10的源极和电阻R60的另一端均接地;所述MOS管Q10的漏极分别与二极管D17的正极、继电器RL2的第八引脚和继电器RL6的第八引脚电连接,所述二极管D17的负极分别与继电器RL2的第一引脚和继电器RL6的第一引脚电连接,所述继电器RL2的第三引脚与继电器RL6的第六引脚电连接,所述继电器RL2的第六引脚与继电器RL6的第三引脚电连接,所述继电器RL2的第四引脚分别与二极管Z3的一端、接口J9的第一引脚和继电器RL6的第五引脚电连接,所述继电器RL2的第五引脚分别与二极管Z3的另一端、接口J9的第二引脚和继电器RL6的第四引脚电连接;
具体如图11,所述第三分支电路包括电阻R64、电阻R65、MOS管Q11、二极管D18、继电器RL3、二极管Z4、接口J12和继电器RL7;其中,电阻R64的阻值为10KΩ;电阻R65的阻值为1MΩ;MOS管Q11的型号为2302;二极管D18的型号为1N4148;继电器RL3的型号为HFD4/5;二极管Z4的型号为TVS-Z;继电器RL7的型号为HF42F/05;
所述电阻R64的一端与控制芯片U7的第五十六引脚电连接,所述电阻R64的另一端分别与MOS管Q11的栅极和电阻R65的一端电连接,所述MOS管Q11的源极和电阻R65的另一端均接地;所述MOS管Q11的漏极分别与二极管D18的正极、继电器RL3的第八引脚和继电器RL7的第八引脚电连接,所述二极管D18的负极分别与继电器RL3的第一引脚和继电器RL7的第一引脚电连接,所述继电器RL3的第三引脚与继电器RL7的第六引脚电连接,所述继电器RL3的第六引脚与继电器RL7的第三引脚电连接,所述继电器RL3的第四引脚分别与二极管Z4的一端、接口J12的第一引脚和继电器RL7的第五引脚电连接,所述继电器RL3的第五引脚分别与二极管Z4的另一端、接口J12的第二引脚和继电器RL7的第四引脚电连接;
具体如图12,所述第四分支电路包括电阻R80、电阻R82、MOS管Q16、二极管D19、继电器RL4、二极管Z5、接口J14和继电器RL8;其中,电阻R80的阻值为10KΩ;电阻R82的阻值为1MΩ;MOS管Q16的型号为2302;二极管D19的型号为1N4148;继电器RL4的型号为HFD4/5;二极管Z5的型号为TVS-Z;继电器RL8的型号为HF42F/05;
所述电阻R80的一端与控制芯片U7的第五十七引脚电连接,所述电阻R80的另一端分别与MOS管Q16的栅极和电阻R82的一端电连接,所述MOS管Q16的源极和电阻R82的另一端均接地;所述MOS管Q16的漏极分别与二极管D19的正极、继电器RL4的第八引脚和继电器RL8的第八引脚电连接,所述二极管D19的负极分别与继电器RL4的第一引脚和继电器RL8的第一引脚电连接,所述继电器RL4的第三引脚与继电器RL8的第六引脚电连接,所述继电器RL4的第六引脚与继电器RL8的第三引脚电连接,所述继电器RL4的第四引脚分别与二极管Z5的一端、接口J14的第一引脚和继电器RL8的第五引脚电连接,所述继电器RL4的第五引脚分别与二极管Z5的另一端、接口J14的第二引脚和继电器RL8的第四引脚电连接;
具体如图13,所述第五分支电路包括电阻R131、电阻R132、电阻R129、电阻R130、MOS管Q24和MOS管Q23;其中,电阻R131的阻值为10KΩ;电阻R132、电阻R129的阻值为1MΩ;电阻R130的阻值为1KΩ;MOS管Q24的型号为2302;MOS管Q23的型号为2301;
所述电阻R131的一端与控制芯片U7的第五十八引脚电连接,所述电阻R131的另一端分别与MOS管Q24的栅极和电阻R132的一端电连接,所述MOS管Q24的源极和电阻R132的另一端均接地;所述MOS管Q24的漏极与电阻R130的一端电连接,所述电阻R130的另一端分别与电阻R129的一端和MOS管Q23的栅极电连接,所述电阻R129的另一端与MOS管Q23的源极电连接,所述MOS管Q23的漏极接3.3V电源。
由上述描述可知,防雷电路由TVS瞬态抑制二极管ZD2、TVS瞬态抑制二极管ZD3、TVS瞬态抑制二极管ZD4、TVS瞬态抑制二极管ZD5、通讯接插口J5,通讯接插口J9,通讯接插口J12和通讯接插口J14组成,其中,TVS瞬态抑制二极管ZD2与通讯接插口J5相连组成第一路防雷电路;TVS瞬态抑制二极管ZD3与通讯接插口J9相连组成第二路防雷电路;TVS瞬态抑制二极管ZD4与通讯接插口J12相连组成第三路防雷电路;TVS瞬态抑制二极管ZD5与通讯接插口J14相连组成第四路防雷电路。
如图14,本发明的基于M-BUS的4G水表采集器还包括过流保护电路,所述过流保护电路包括电容C58、瓷片电容E10、电阻R99、MOS管Q18、电阻R101、三极管Q21、电阻R109、电阻R111、施密特触发器U5D、电阻R128、电阻R107、电容C66、电容C18、二极管D21、电容C62、施密特触发器U5A、电阻R25、三极管Q22、电阻R113、电阻R110、稳压二极管ZW2、电容C67、电阻R28、电阻R31、电阻R97、电阻R125、电阻R126、电阻R127、电容C76、三极管Q20、电阻R108、稳压二极管ZW3、电阻R112、电阻R98、电容C13、电容C14和稳压二极管ZW4;
其中,电容C58的电容值为0.1μF;瓷片电容E10的电容值为220μF,电压为50V;电阻R99的阻值为100KΩ;MOS管Q18的型号为IRFR9024N;电阻R101的阻值为1KΩ;三极管Q21的型号为MMBT5551;电阻R109的阻值为1KΩ;电阻R111的阻值为1MΩ;施密特触发器U5D的型号为4093;电阻R128的阻值为10KΩ;电阻R107的阻值为1.5MΩ;电容C66的电容值为10μF;电容C18的电容值为0.1μF;二极管D21的型号为1N4148;电容C62的电容值为0.1μF;施密特触发器U5A的型号为4093;电阻R25的阻值为10KΩ;三极管Q22的型号为MMBT5551;电阻R113的阻值为10KΩ;电阻R110的阻值为51KΩ;稳压二极管ZW2的型号为ZMM15;电容C67的电容值为0.1μF;电阻R28的阻值为1MΩ;电阻R31的阻值为30KΩ;电阻R97的阻值为100KΩ;电阻R125的阻值为1MΩ;电阻R126的阻值为1MΩ;电阻R127的阻值为0R;电容C76的电容值为0.1μF;三极管Q20的型号为5401;电阻R108的阻值为10KΩ;稳压二极管ZW3的型号为ZMM15;电阻R112的阻值为10KΩ;电阻R98的阻值为30KΩ;电容C13的电容值为0.1μF;电容C14的电容值为0.1μF;稳压二极管ZW4的型号为ZMM3V6;
所述电容C58的一端、瓷片电容E10的一端、电阻R99的一端和MOS管Q18的源极相互连接,所述电容C58的另一端和瓷片电容E10的另一端均接地,所述MOS管Q18的栅极分别与电阻R99的另一端和电阻R101的一端电连接,所述电阻R101的另一端与三极管Q21的集电极电连接,所述三极管Q21的发射极接地,所述三极管Q21的基极分别与电阻R109的一端和电阻R111的一端电连接,所述电阻R111的另一端接地,所述电阻R109的另一端分别与施密特触发器U5D的输出端和电阻R128的一端电连接,所述电阻R128的另一端与控制芯片U7的第五十八引脚电连接,所述施密特触发器U5D的两个输入端相互连接且分别与二极管D21的负极、电阻R107的一端、电容C66的一端、电容C18的一端和电阻R125的一端电连接;所述电容C66的另一端和电容C18的另一端均接地,所述二极管D21的正极分别与电阻R107的另一端和施密特触发器U5A的输出端电连接,所述施密特触发器U5A的电源端接3.3V电源,所述施密特触发器U5A的电源端通过电容C62接地,所述施密特触发器U5A的两个输入端相互连接且分别与电阻R25的一端和三极管Q22的集电极电连接,所述电阻R25的另一端接3.3V电源,所述三极管Q22的基极分别与电阻R113的一端和稳压二极管ZW2的正极电连接,所述电阻R113的另一端和三极管Q22的发射极均接地,所述稳压二极管ZW2的负极分别与电容C67的一端、电阻R28的一端和电阻R110的一端电连接,所述电容C67的另一端分别与电阻R126的一端、电容C76的一端和电阻R97的一端电连接且均接地;所述电阻R126的另一端分别与电阻R125的另一端、电容C76的另一端和电阻R127的一端电连接,所述电阻R127的另一端与控制芯片U7的第三十五引脚电连接,所述电阻R97的另一端与电阻R31的一端电连接,所述电阻R31的另一端分别与电阻R28的另一端、电容C13的一端和电阻R98的一端电连接,所述电阻R98的另一端分别与电容C14的一端和稳压二极管ZW4的负极电连接且均与控制芯片U7的第三十五引脚电连接;所述电容C13的另一端、电容C14的另一端和稳压二极管ZW4的正极均接地;所述电阻R110的另一端与三极管Q20的集电极电连接,所述三极管Q20的基极分别与稳压二极管ZW3的负极和电阻R108的一端电连接,所述电阻R108的另一端与三极管Q20的发射极电连接;所述稳压二极管ZW3的正极通过电阻R112与M-BUS接收电路中的稳压二极管ZW11的负极电连接。
由上述描述的电路连接关系可知,上述的过流保护电路由施密特触发器U5、开关调整管Q18、开关调整管Q20、开关调整管Q22、开关调整管Q23、开关调整管Q24、稳压管ZW2、稳压管ZW3、稳压管ZW4、二极管D21等半导体器件和为数不多的阻容器件组成,在系统中如果能耗消耗过大,单片机通过485-I_DET管脚控制触发施密特触发器U5,开启\关闭开关调整管Q18,达到过流保护的目的。
如图15,本发明的基于M-BUS的4G水表采集器还包括M-BUS电源电路9,所述M-BUS电源电路9包括瓷片电容E6、电容C51、电阻R83、电感L7、电阻R90、电阻R91、电容C56、集成芯片U10、二极管D20、电容C52、电阻R92、电容C59、电容C57、电阻R84、电阻R89、电阻R85、电阻R93、电阻R87、电容C50、电容C44、电容C45、瓷片电容E7和MOS管Q17;
其中,瓷片电容E6的电容值为22μF;电容C51的电容值为0.1μF;电阻R83的阻值为100KΩ;电感L7的电感值为22μH;电阻R90的阻值为33KΩ;电阻R91的阻值为100KΩ;电容C56的电容值为0.1μF;二极管D20的型号为SS36;电容C52的电容值为0.1μF;电阻R92的阻值为12KΩ;电容C59的电容值为4700pF;电容C57的电容值为100pF;电阻R84的阻值为510KΩ;电阻R89的阻值为20KΩ;电阻R85的阻值为82KΩ;电阻R93的阻值为10KΩ;电阻R87的阻值为10R;电容C50的电容值为18pF;电容C44的电容值为0.1μF;电容C45的电容值为4.7μF;瓷片电容E7的电容值为220μF,电压值为50V;MOS管Q17的型号为2302;
所述集成芯片U10的型号为MPQ3426;
所述瓷片电容E6的一端、电容C51的一端、电阻R83的一端和电感L7的一端均与集成芯片U10的第三引脚电连接,所述瓷片电容E6的另一端和电容C51的另一端均接地,所述电阻R83的另一端分别与集成芯片U10的第二引脚和电阻R90的一端电连接,所述电阻R91的一端与集成芯片U10的第十四引脚电连接,所述电容C56的一端与集成芯片U10的第十二引脚电连接,所述电阻R90的另一端、电阻R91的另一端和电容C56的另一端均接地,所述集成芯片U10的第八引脚、第九引脚、第十引脚、第十一引脚和第十五引脚均接地,所述集成芯片U10的第四引脚、第五引脚和第六引脚相互连接且分别与电感L7的另一端和二极管D20的正极电连接,所述二极管D20的负极分别与电阻R84的一端、电容C50的一端、电容C44的一端、电容C45的一端和瓷片电容E7的一端电连接且均接32V电源;所述电容C44的另一端、电容C45的另一端和瓷片电容E7的另一端均接地;所述集成芯片U10的第十三引脚分别与电阻R84的另一端、电容C50的另一端、电阻R89的一端和电阻R85的一端电连接,所述电阻R89的另一端与MOS管Q17的源极电连接且均接地,所述电阻R85的另一端与MOS管Q17的漏极电连接,所述MOS管Q17的源极与电阻R93的一端电连接,所述MOS管Q17的栅极分别与电阻R93的另一端和电阻R87的一端电连接,所述电阻R87的另一端与施密特触发器U5C第十引脚电连接;所述集成芯片U10的第一引脚分别与电阻R92的一端和电容C57的一端电连接,所述电阻R92的另一端与电容C59的一端电连接,所述电容C57的另一端和电容C59的另一端均接地;所述集成芯片U10的第七引脚通过电容C52接地。
由上述描述的电路连接关系可知,12VDC转32VDC升压电路由PWM开关调整器U10、储能电感L7、调整管Q17及周边阻容器件组成,通过boost开光电源拓扑结构将12VDC的电压升压到32VDC供MBUS通信总线完成MBUS通信功能。
如图16,所述M-BUS电源电路还包括电容C73、电容C72、电容C74、电阻R119、集成芯片U8、电阻R118、电阻R120、电阻R121、电阻R122、电阻R123、电容C38、电容C39、电容C40、电容C41和电感L9;其中,电容C73的电容值为22uF;电容C72的电容值为0.1μF;电容C74的电容值为0.022uF;电阻R119的阻值为1MΩ;电阻R118的阻值为20R;电阻R120的阻值为24KΩ;电阻R121的阻值为10R;电阻R122的阻值为3.3KΩ;电阻R123的阻值为1KΩ;电容C38的电容值为0.1μF;电容C39的电容值为15pF;电容C40的电容值为1μF;电容C41的电容值为22μF;电感L9的电感值为1.5μH。
所述集成芯片U8的型号为MP2233;
所述集成芯片U8的第一引脚通过电容C74接地;所述集成芯片U8的第二引脚通过电容C73接地且所述集成芯片U8的第二引脚接电池+BAT;所述集成芯片U8的第四引脚接地;所述集成芯片U8的第六引脚通过电阻R119接地且所述集成芯片U8的第六引脚与控制芯片U7的第五十八引脚电连接;所述集成芯片U8的第七引脚通过电容C72接地;所述集成芯片U8的第五引脚通过电阻R118与电容C38的一端电连接,所述集成芯片U8的第三引脚分别与电容C38的另一端和电感L9的一端电连接,所述电感L9的另一端、电阻R121的一端、电容C40的一端和电容C41的一端相互连接且均接3.3V电源;所述电容C40的另一端和电容C41的另一端均接地;所述集成芯片U8的第八引脚与电阻R120的一端电连接,所述电阻R120的另一端分别与电容C39的一端、电阻R122的一端和电阻R123的一端电连接,所述电容C39的另一端分别与电阻R121的另一端和电阻R122的另一端电连接,所述电阻R123的另一端接地。
由上述描述的电路连接关系可知,4.2VDC—7.2VDC降压电路由可调式-降压-开关稳压器U8、储能电感L9及外围阻容起降构成,可调式-降压-开关稳压器U8通过可变更的PWM频率达到将4.2VDC—7.2VDC的电池电压降为稳定的3.3VDC供系统使用。
如图17,本发明的基于M-BUS的4G水表采集器还包括存储模块,所述存储模块包括集成芯片U6;
所述集成芯片U6的型号为AT25FS010;所述集成芯片U6的第一引脚与控制芯片U7的第二十六引脚电连接;所述集成芯片U6的第二引脚与控制芯片U7的第二十二引脚电连接;所述集成芯片U6的第三引脚、第七引脚和第八引脚相互连接;所述集成芯片U6的第四引脚接地;所述集成芯片U6的第五引脚与控制芯片U7的第二十三引脚电连接;所述集成芯片U6的第六引脚与控制芯片U7的第二十一引脚电连接。
由上述描述的电路连接关系可知,通过型号为AT25FS010的集成芯片U6实现对采集到的数据进行存储,以满足后续的查询需求。
如图18,本发明的基于M-BUS的4G水表采集器还包括蜂鸣器模块,所述蜂鸣器模块包括电阻R70、电阻R73、三极管Q13和蜂鸣器BL1;
其中,电阻R70的阻值为1KΩ;电阻R73的阻值为10KΩ;三极管Q13的型号为9013;蜂鸣器BL1的型号为TMB9.5A(3V)。
所述电阻R70的一端与控制芯片U7的第二十七引脚电连接;所述电阻R70的另一端分别与电阻R73的一端和三极管Q13的基极电连接,所述电阻R73的另一端与三极管Q13的发射极电连接且均接地,所述三极管Q13的集电极与蜂鸣器BL1的一端电连接,所述蜂鸣器BL1的另一端接3.3V电源。
由上述描述的电路连接关系可知,当出现异常情况时,通过蜂鸣器BL1实现提醒功能。
如图19,本发明的基于M-BUS的4G水表采集器还包括温度感应模块,所述温度感应模块包括电容C24、电容C25、电阻R55和热敏电阻RT1;
其中,电容C24、电容C25的电容值为0.1μF;电阻R55的阻值为10KΩ;热敏电阻RT1的阻值为10KΩ。
所述电容C24的一端分别与电阻R55的一端和所述集成芯片U6的第三引脚电连接,所述电容C24的另一端、热敏电阻RT1的一端和电容C25的一端均接地;所述电阻R55的另一端、热敏电阻RT1的另一端和电容C25的另一端相互连接且均与控制芯片U7的第三十四引脚电连接。
由上述描述的电路连接关系可知,通过热敏电阻RT1进行温度采样,便于对水表采集器的环境温度进行监控,达到更好保护水表采集器以及确保数据采集过程中的稳定性。
如图20,本发明的基于M-BUS的4G水表采集器还包括指示灯模块,所述指示灯模块包括发光二极管LED1、发光二极管LED2、发光二极管LED3、发光二极管LED4、发光二极管LED5、发光二极管LED6、发光二极管LED7、电阻R66、电阻R74、电阻R79、MOS管Q14、电阻R75、电阻R76和电阻R77;
其中,发光二极管LED1、发光二极管LED2、发光二极管LED3、发光二极管LED4、发光二极管LED5、发光二极管LED6和发光二极管LED7的型号均为LED-0805;电阻R66的阻值为330R;电阻R74的阻值为10KΩ;电阻R79的阻值为1MΩ;MOS管Q14的型号为2302;电阻R75、电阻R76和电阻R77的阻值均为330R;
所述发光二极管LED1的正极与控制芯片U7的第五十四引脚电连接;所述发光二极管LED2的正极与控制芯片U7的第五十五引脚电连接;所述发光二极管LED3的正极与控制芯片U7的第五十六引脚电连接;所述发光二极管LED4的正极与控制芯片U7的第五十七引脚电连接;所述发光二极管LED1的负极、所述发光二极管LED2的负极、所述发光二极管LED3的负极和所述发光二极管LED4的负极相互连接且与电阻R66的一端电连接,所述电阻R66的另一端与MOS管Q14的漏极电连接,所述MOS管Q14的栅极分别与电阻R74的一端和电阻R79的一端电连接,所述电阻R74的另一端与控制芯片U7的第五十一引脚电连接,所述电阻R79的另一端和MOS管Q14的源极电连接且均接地;所述发光二极管LED5的正极、发光二极管LED6的正极和发光二极管LED7的正极均接3.3V电源,所述发光二极管LED5的负极通过电阻R75与控制芯片U7的第五十引脚电连接,所述发光二极管LED6的负极通过电阻R76与控制芯片U7的第五十二引脚电连接,所述发光二极管LED7的负极通过电阻R77与控制芯片U7的第五十三引脚电连接。
由上述描述的电路连接关系可知,通过多个发光二极管能够指示多种使用状态,例如充电状态、亏电状态、正常状态、异常状态、数据采集状态等等,便于操作者能够快速获知水表采集器的当前状态。
另外,如图21-29所示,本发明还提供基于M-BUS的4G水表采集器的外围电路设计,如图21为收发器的电路连接图,图中各电子元器件的具体参数下:
二极管D4的型号为SMB-SS34,电阻R14、电阻R24的阻值为100Ω,电阻R19的阻值为2.2KΩ,电阻R11和电阻R26的阻值为4.7KΩ,集成芯片U2的型号为MAX3430,电阻R6和电阻R3的阻值为10KΩ,电阻R4和R27的阻值为100KΩ,三极管Q3的型号为9013,电阻R30的阻值为33KΩ,二极管D5和D10的型号为1N4148。通过图21的电路连接以及各电子元器件的参数配合,实现收发功能。
图22为本发明的7.2V电池电量检测电路的电路连接图;图中各电子元器件的具体参数下:
电阻R67和电阻R81的阻值为1MΩ,电阻R72的阻值为1KΩ,电阻R68的阻值为680KΩ,电阻R68的阻值为10KΩ,电阻R71的阻值为100KΩ,电阻R78和电阻R133的阻值为10KΩ,三极管Q12的型号为2301,三极管Q15的型号为2302,电容C42、C78和C77均为0.1μF。通过图22的电路连接以及各电子元器件的参数配合,实现7.2V电池电量检测功能。
图23为本发明的开关式稳压电路的电路连接图;图中各电子元器件的具体参数下:
电容C64、C63、C65、C53的电容值为0.1μF;瓷片电容E11的电容值为22μF,电压值为20V;电阻R96的阻值为1MΩ,集成芯片U11的型号为MP2233,电阻R86的阻值为20R,电阻R94的阻值为24KΩ,电阻R104的阻值为1KΩ,电阻R102的阻值为4.02KΩ,电容C60的电容值为15pF,电感L8的电感值为1.5μH,电阻R95的阻值为10R,电容C61的电容值为1μF。通过图23的电路连接以及各电子元器件的参数配合,实现稳压功能。
图24为本发明的485通讯电路的电路连接图;图中各电子元器件的具体参数下:
电阻R36、R39的阻值为1MΩ,电阻R38的阻值为4.7KΩ,电阻R41的阻值为100KΩ,三极管Q6的型号为2302;电阻R45、R47的阻值为10KΩ,电容C20、C21的电容值为0.1μF,电阻R43的阻值为1KΩ。通过图24的电路连接以及各电子元器件的参数配合,实现485通讯功能。
图25为本发明的复位电路的电路连接图;图中各电子元器件的具体参数下:电阻R61的阻值为10KΩ,电容C30的电容值为0.1μF。通过图25的电路连接以及各电子元器件的参数配合,实现复位功能。
图26为本发明的电池充电过压保护电路连接图,图中各电子元器件的具体参数下:
电阻R44、R46的电流值为2A,Z1的型号为BA201N,ZD2的型号为SMBJ36。
图27为本发明的MCU供电端π型低通滤波电路连接图,图中各电子元器件的具体参数下:
电容C28、C29的电容值为100nF,瓷片电容E2的电容值为10μF,电压值为16V,瓷片电容E3的电容值为100μF,电压值为10V,电感L5、L6均为120R。
图28为本发明的程序下载接口电路的电路连接图;图中各电子元器件的具体参数下:电容C23的电容值为100nF,电阻R50、R51的阻值均为10KΩ。通过图28的电路连接以及各电子元器件的参数配合,实现程序下载功能。
图29为本发明的存储器电源控制输出电路的电路连接图;图中各电子元器件的具体参数下:
电阻R49的阻值为47KΩ,电阻R53的阻值为4.7KΩ,电容C22的电容值为100nF,瓷片电容E1的电容值为22μF,MOS管Q7的型号为2301。通过图29的电路连接以及各电子元器件的参数配合,实现存储器电源控制功能。
综上所述,本发明提供的一种M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,其中M-BUS接收电路由可调稳压电源LM317、施密特触发器CD4093、比较器LM393、三极管Q2、三极管Q4、二极管D2、二极管D8、二极管D9、二极管D10、二极管D1及若干阻容电路构成,系统通过12VDC升压至32VDC电压通过可调稳压电源U1将电压调整为±15VDC,由稳压管将电压降为7.5VDC,再通过比较器U3第一脚输出高电平输入到第二比较器IN-管脚与IN+管脚的1.5VDC,在第7脚输出低电平触发施密特触发器接收MBUS通讯数据。三极管Q2基极受单片机控制使能施密特触发器,在需要接收MBUS数据时,该引脚将被使能,三极管Q4为调整稳压器U1的ADJ引脚控制调整电压在15VDC左右,二极管D2与电容将32VDC电压进行隔离,即在输入12VDC电源在有波动时,不会在mS等级的时间内影响MBUS通讯,二极管D10将比较器第2引脚的信号进行隔离与二极管D8,二极管D9组成限幅电路,防止比较器进入过零比较;二极管D1接在稳压器U1的输入脚和接地脚,防止保护电压信号接反而损坏稳压器U1的效果。因此,本发明提供的M-BUS接收电路可大幅提高信噪比,可靠性和稳定性明显提高。同理,本发明还提供的基于M-BUS的4G水表采集器,能够有效提高水表数据采集的稳定性。通过上述电源模块结构解决采集器现场取电难的问题,通过采用功耗技术,电源的待机电流<0.3μA,可长时间供电,使突破现场取电难的制约成为可能。通过上述4G通讯模块结构解决采集器网络的速率慢的问题,该采集器是现有GRPS、CDMA网络速率的30-18000倍。通过上述蓝牙模块结构解决采集器近端通讯接口需用连接线且容易接触不良的问题,该采集器内置蓝牙模块,可通过手机APP用蓝牙连接进行操作。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等同变换,或直接或间接运用在相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (16)

  1. 一种M-BUS接收电路,设置在控制单元和M-BUS过流保护电路之间且用于连接控制单元和M-BUS过流保护电路,其特征在于,包括电容C3、电容C2、稳压芯片U1、二极管D1、电阻R16、电阻R10、电阻R8、电阻R17、电容C9、电阻R9、电阻R21、电阻R22、三极管Q4、施密特触发器U5C、电阻R124、电阻R105、三极管Q2、电阻R12、电阻R103、电阻R33、施密特触发器U5B、电压比较器U3B、电阻R32、电阻R34、电容C75、电阻R15、二极管D2、电阻R117、电容C7、电容C5、电容C8、电容C10、电压比较器U3A、电阻R29、二极管D8、二极管D9、二极管D10、二极管D11、电容C15、电容C16、电容C17、电容C81、电容C6、电阻R18、电阻R20、电阻R205、电阻R203、电阻R204、电阻R201、电阻R202、电阻R7、电容C202、电容C200、电容C201、电容C203、电容C4、运算放大器U15A、稳压二极管ZW10、稳压二极管ZW11和运算放大器U15B;
    所述电容C3和电容C2并联连接,所述电容C3和电容C2并联后的一端接地,所述电容C3和电容C2并联后的另一端与稳压芯片U1的第三引脚均与32V电源电连接;所述二极管D1的负极与稳压芯片U1的第三引脚电连接,所述二极管D1的正极与稳压芯片U1的第二引脚电连接;所述稳压芯片U1的第二引脚分别电阻R10的一端和电阻R8的一端电连接,所述电阻R10的另一端分别与稳压芯片U1的第一引脚、电阻R16的一端、电容C9的一端和电阻R17的一端电连接,所述电阻R16的另一端与三极管Q4的集电极电连接,所述三极管Q4的基极与电阻R22的一端电连接,所述电阻R22的另一端分别与电阻R9的一端、施密特触发器U5C的输出端和电阻R21的一端电连接,所述电阻R9的另一端接3.3V电源,所述施密特触发器U5C的两个输入端相互连接且与控制单元电连接,所述电阻R21的另一端与三极管Q4的发射极电连接且均接地;所述电容C9的另一端、电阻R17的另一端和电阻R8的另一端相互连接且均接地;
    所述电阻R124的一端与控制单元电连接,所述电阻R124的另一端分别与电阻R105的一端和三极管Q2的基极电连接,所述电阻R105的另一端与三极管Q2的发射极相互连接且均接地;所述三极管Q2的集电极与电阻R12的一端电连接,所述电阻R12的另一端分别与施密特触发器U5B的一输入端和电阻R103的一端电连接,所述电阻R103的另一端与电阻R33的一端相互连接且均接3.3V电源;所述电阻R33的另一端分别与施密特触发器U5B的另一输入端和电压比较器U3B的输出端电连接,所述施密特触发器U5B的输出端与控制单元电连接;所述电压比较器U3B的正向输入端分别与电阻R32的一端、电阻R34的一端和电容C75的一端电连接,所述电阻R32的一端接3.3V电源,所述电阻R34的另一端和电容C75的另一端相互连接且均接地;所述电压比较器U3B的反向输入端通过电阻R15接3.3V电源;
    所述电压比较器U3B的反向输入端分别与电容C8的一端、电容C10的一端和电压比较器U3A的输出端电连接,所述电容C10的另一端接地,所述电容C8的另一端分别与电压比较器U3A的正向输入端、二极管D8的正极、二极管D10的负极和电阻R18的一端电连接;所述电压比较器U3A的反向输入端分别与电阻R29的一端、二极管D8的负极、二极管D9的正极、电容C15的一端、电容C16的一端、电容C17的一端、电容C81的一端和电阻R20的一端电连接,所述电阻R29的另一端、电容C15的另一端、电容C16的另一端、电容C17的另一端和电容C81的另一端相互连接且均接地;所述二极管D9的负极与二极管D10的正极电连接,所述电阻R20的另一端分别与二极管D11的负极和电容C6的一端电连接,所述电容C6的另一端接地,所述二极管D11的正极和电阻R18的另一端均与运算放大器U15B的输出端电连接;
    所述运算放大器U15B的反向输入端与运算放大器U15B的输出端电连接,所述运算放大器U15B的正向输入端分别与运算放大器U15A的输出端、电容C202的一端和电阻R205的一端电连接;所述电容C202的另一端、电阻R205的另一端、电容C200的一端和电阻R203的一端均与运算放大器U15A的反向输入端电连接,所述电容C200的另一端接地,所述电阻R203的另一端分别与电阻R201的一端和稳压二极管ZW10的正极电连接,所述电阻R201的另一端接地,所述稳压二极管ZW10的负极分别与稳压芯片U1的第二引脚和电阻R7的一端电连接,所述电阻R7的另一端分别与稳压二极管ZW11的负极、电容C4的一端和M-BUS过流保护电路电连接;所述稳压二极管ZW11的正极分别与电阻R202的一端和电阻R204的一端电连接,所述电阻R202的另一端接地,所述电阻R204的另一端分别与电容C201的一端和运算放大器U15A的正向输入端电连接,所述电容C201的另一端接地,所述运算放大器U15A的电源端通过电容C203后接地;
    所述二极管D2的正极接32V电源,所述二极管D2的负极分别与电阻R117的一端和电容C7的一端电连接,所述电阻R117的另一端与电容C5的一端电连接,所述电容C7的另一端和电容C5的另一端相互连接且均接地。
  2. 根据权利要求1所述的M-BUS接收电路,其特征在于,所述控制单元包括型号为STM32L15xRC的控制芯片U7,所述施密特触发器U5C的两个输入端均与控制芯片U7的第二十九引脚电连接,所述电阻R124的一端与控制芯片U7的第五十九引脚电连接,所述施密特触发器U5B的输出端与控制芯片U7的第三十引脚电连接。
  3. 一种基于M-BUS的4G水表采集器,其特征在于,包括电源模块、控制单元、4G通讯模块、蓝牙通讯模块、SIM卡电路、水表通讯接口、天线、防雷电路和权利要求2所述的M-BUS接收电路;
    所述电源模块分别与控制单元和4G通讯模块电连接,所述控制单元分别与SIM卡电路、蓝牙通讯模块和M-BUS接收电路电连接,所述4G通讯模块与天线电连接,所述M-BUS接收电路与水表通讯接口电连接,所述水表通讯接口与防雷电路电连接。
  4. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,所述电源模块包括电感J0、电感L1、电感L2、电感L3、电感L4、二极管D15、电阻RP1、稳压管ZD1、插接口J2、MOS管Q5、电阻R35、电阻R37、电阻R40、电阻R42、电容C19、稳压芯片U9、电容C34、电容C35、瓷片电容E4、瓷片电容E5、电容C36和电容C37;
    所述电感J0的一端与电池+BAT电连接,所述电感J0的另一端与二极管D15的负极电连接,所述二极管D15的正极分别与电感L1的一端、电感L2的一端和电阻R42的一端电连接,所述电感L1的另一端分别与电感L2的另一端、电阻RP1的一端和稳压管ZD1的一端电连接,所述电阻RP1的另一端与插接口J2的第一引脚电连接,所述稳压管ZD1的另一端分别与插接口J2的第二引脚、插接口J2的第三引脚、电感L3的一端和电感L4的一端电连接;所述电感L3的另一端和电感L4的另一端相互连接且均接地;所述电阻R42的另一端分别与MOS管Q5的栅极、电阻R40的一端和电容C19的一端电连接;所述电阻R40的另一端、电容C19的另一端和电阻R37的一端相互连接且均接地;所述电阻R37的另一端分别与电阻R35的一端和控制芯片U7的第三十八引脚电连接,所述电阻R35的另一端与MOS管Q5的源极电连接,所述MOS管Q5的漏极接3.3V电源;
    所述稳压芯片U9的第二引脚、电容C34的一端、电容C35的一端和瓷片电容E4的一端相互连接且均与电池+BAT电连接,所述稳压芯片U9的第三引脚、瓷片电容E5的一端、电容C36的一端和电容C37的一端相互连接且均接3.3V电源,所述电容C34的另一端、电容C35的另一端、瓷片电容E4的另一端、稳压芯片U9的第一引脚、瓷片电容E5的另一端、电容C36的另一端和电容C37的另一端相互连接且均接地。
  5. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,所述4G通讯模块包括集成芯片GSM1、电容C46、电容C47、电容C48、电容C49、瓷片电容E8、瓷片电容E9、稳压二极管Z6、电阻R100、三极管Q19、二极管D22、二极管D23、电阻R106、电阻R114、电阻R88、电容C54和电容C55;
    所述集成芯片GSM1的型号为M26FA-03-STD,所述电容C46的一端、电容C47的一端、电容C48的一端、电容C49的一端、瓷片电容E8的一端、瓷片电容E9的一端和稳压二极管Z6的负极相互连接且均与集成芯片GSM1的第四十二引脚以及第四十三引脚电连接;所述电容C46的另一端、电容C47的另一端、电容C48的另一端、电容C49的另一端、瓷片电容E8的另一端、瓷片电容E9的另一端和稳压二极管Z6的正极相互连接且均接地;
    所述三极管Q19的基极通过电阻R100与控制芯片U7的第十五引脚电连接,所述三极管Q19的集电极与集成芯片GSM1的第七引脚电连接,所述三极管Q19的发射极接地;
    所述集成芯片GSM1的第十一引脚、第十二引脚、第十三引脚和第十四引脚分别与SIM卡电路电连接;
    所述集成芯片GSM1的第十七引脚分别与二极管D23的正极和电阻R114的一端电连接,所述二极管D23的负极与控制芯片U7的第十六引脚电连接,所述电阻R114的另一端与集成芯片GSM1的第二十四引脚电连接;所述集成芯片GSM1的第十八引脚与二极管D22的正极电连接,所述二极管D22的负极分别与电阻R106的一端和控制芯片U7的第十七引脚电连接,所述电阻R106的另一端接地;所述集成芯片GSM1的第三十五引脚分别与电阻R88的一端和电容C54的一端电连接,所述电容C54的另一端接地,所述电阻R88的另一端分别与电容C55的一端和IPEX天线接口电连接,所述IPEX天线接口与天线电连接,所述电容C55的另一端接地。
  6. 根据权利要求5所述的基于M-BUS的4G水表采集器,其特征在于,所述SIM卡电路包括集成芯片U13、电阻R115、电阻R116、集成芯片U12、电容C68、电容C69、电容C70和电容C71;
    所述集成芯片U13为M2M-SMD,所述集成芯片U12为SIM-CARD;
    所述集成芯片U13的第一引脚和第九引脚接地,所述集成芯片U13的第二引脚通过电阻R115与集成芯片GSM1的第十一引脚电连接,所述集成芯片U13的第三引脚通过电阻R116与集成芯片GSM1的第十一引脚电连接,所述集成芯片U13的第六引脚与集成芯片GSM1的第十三引脚电连接,所述集成芯片U13的第七引脚与集成芯片GSM1的第十二引脚电连接,所述集成芯片U13的第八引脚与集成芯片GSM1的第十四引脚电连接;
    所述集成芯片U12的第一引脚分别与集成芯片GSM1的第十四引脚和电容C68的一端电连接,所述集成芯片U12的第二引脚分别与集成芯片GSM1的第十二引脚和电容C69的一端电连接,所述集成芯片U12的第三引脚分别与集成芯片GSM1的第十三引脚和电容C70的一端电连接,所述集成芯片U12的第七引脚分别与集成芯片GSM1的第十一引脚和电容C71的一端电连接,所述集成芯片U12的第五引脚、电容C68的另一端、电容C69的另一端、电容C70的另一端和电容C71的另一端相互连接且均接地。
  7. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,所述蓝牙通讯模块包括电阻R1、电阻R2、电阻R5、电容C1、MOS管Q1、集成芯片U4、电容C11、电容C12、电阻R13、二极管D6和二极管D7;
    所述电阻R1的一端与MOS管Q1的源极电连接且均接3.3V电源;所述电阻R1的另一端分别与MOS管Q1的栅极和电阻R5的一端电连接,所述电阻R5的另一端与控制芯片U7的第三十三引脚电连接;所述MOS管Q1的漏极分别与电容C1的一端和电阻R2的一端电连接,所述电容C1的另一端和电阻R2的另一端均接地;所述MOS管Q1的漏极与电阻R13的一端电连接;
    所述电阻R13的另一端分别与集成芯片U4的第十七引脚和二极管D6的正极电连接,所述二极管D6的负极与控制芯片U7的第四十二引脚电连接;所述二极管D7的负极与集成芯片U4的第十六引脚电连接;所述二极管D7的正极与控制芯片U7的第四十三引脚电连接;所述集成芯片U4的第一引脚、第六引脚和第十四引脚均接地;所述集成芯片U4的第二引脚分别与电容C11的一端和电容C12的一端电连接,所述电容C11的另一端和电容C12的另一端均接地。
  8. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,所述水表通讯接口包括电阻R57、MOS管Q9、电阻R62、电阻R58、电容C27、接口J10和接口J11;
    所述电阻R57的一端与MOS管Q9的源极电连接且均接3.3V电源;所述电阻R57的另一端分别与MOS管Q9的栅极和电阻R62的一端电连接,所述电阻R62的另一端与控制芯片U7的第三十九引脚电连接,所述MOS管Q9的漏极分别与电容C27的一端和电阻R58的一端电连接,所述电容C27的另一端接地,所述电阻R58的另一端接地;
    所述接口J10的第一引脚、接口J11的第一引脚和MOS管Q9的漏极相互连接;所述接口J10的第二引脚、接口J11的第二引脚和控制芯片U7的第二十九引脚电连接;所述接口J10的第三引脚、接口J11的第三引脚和控制芯片U7的第三十引脚电连接;所述接口J10的第四引脚接地,所述接口J11的第四引脚接地,所述接口J11的第五引脚接电池+BAT。
  9. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,所述防雷电路包括第一分支电路、第二分支电路、第三分支电路、第四分支电路和第五分支电路;
    所述第一分支电路包括电阻R48、电阻R54、MOS管Q8、二极管D16、继电器RL1、二极管Z2、接口J5和继电器RL5;所述电阻R48的一端与控制芯片U7的第五十四引脚电连接,所述电阻R48的另一端分别与MOS管Q8的栅极和电阻R54的一端电连接,所述MOS管Q8的源极和电阻R54的另一端均接地;所述MOS管Q8的漏极分别与二极管D16的正极、继电器RL1的第八引脚和继电器RL5的第八引脚电连接,所述二极管D16的负极分别与继电器RL1的第一引脚和继电器RL5的第一引脚电连接,所述继电器RL1的第三引脚与继电器RL5的第六引脚电连接,所述继电器RL1的第六引脚与继电器RL5的第三引脚电连接,所述继电器RL1的第四引脚分别与二极管Z2的一端、接口J5的第一引脚和继电器RL5的第五引脚电连接,所述继电器RL1的第五引脚分别与二极管Z2的另一端、接口J5的第二引脚和继电器RL5的第四引脚电连接;
    所述第二分支电路包括电阻R56、电阻R60、MOS管Q10、二极管D17、继电器RL2、二极管Z3、接口J9和继电器RL6;所述电阻R56的一端与控制芯片U7的第五十五引脚电连接,所述电阻R56的另一端分别与MOS管Q10的栅极和电阻R60的一端电连接,所述MOS管Q10的源极和电阻R60的另一端均接地;所述MOS管Q10的漏极分别与二极管D17的正极、继电器RL2的第八引脚和继电器RL6的第八引脚电连接,所述二极管D17的负极分别与继电器RL2的第一引脚和继电器RL6的第一引脚电连接,所述继电器RL2的第三引脚与继电器RL6的第六引脚电连接,所述继电器RL2的第六引脚与继电器RL6的第三引脚电连接,所述继电器RL2的第四引脚分别与二极管Z3的一端、接口J9的第一引脚和继电器RL6的第五引脚电连接,所述继电器RL2的第五引脚分别与二极管Z3的另一端、接口J9的第二引脚和继电器RL6的第四引脚电连接;
    所述第三分支电路包括电阻R64、电阻R65、MOS管Q11、二极管D18、继电器RL3、二极管Z4、接口J12和继电器RL7;所述电阻R64的一端与控制芯片U7的第五十六引脚电连接,所述电阻R64的另一端分别与MOS管Q11的栅极和电阻R65的一端电连接,所述MOS管Q11的源极和电阻R65的另一端均接地;所述MOS管Q11的漏极分别与二极管D18的正极、继电器RL3的第八引脚和继电器RL7的第八引脚电连接,所述二极管D18的负极分别与继电器RL3的第一引脚和继电器RL7的第一引脚电连接,所述继电器RL3的第三引脚与继电器RL7的第六引脚电连接,所述继电器RL3的第六引脚与继电器RL7的第三引脚电连接,所述继电器RL3的第四引脚分别与二极管Z4的一端、接口J12的第一引脚和继电器RL7的第五引脚电连接,所述继电器RL3的第五引脚分别与二极管Z4的另一端、接口J12的第二引脚和继电器RL7的第四引脚电连接;
    所述第四分支电路包括电阻R80、电阻R82、MOS管Q16、二极管D19、继电器RL4、二极管Z5、接口J14和继电器RL8;所述电阻R80的一端与控制芯片U7的第五十七引脚电连接,所述电阻R80的另一端分别与MOS管Q16的栅极和电阻R82的一端电连接,所述MOS管Q16的源极和电阻R82的另一端均接地;所述MOS管Q16的漏极分别与二极管D19的正极、继电器RL4的第八引脚和继电器RL8的第八引脚电连接,所述二极管D19的负极分别与继电器RL4的第一引脚和继电器RL8的第一引脚电连接,所述继电器RL4的第三引脚与继电器RL8的第六引脚电连接,所述继电器RL4的第六引脚与继电器RL8的第三引脚电连接,所述继电器RL4的第四引脚分别与二极管Z5的一端、接口J14的第一引脚和继电器RL8的第五引脚电连接,所述继电器RL4的第五引脚分别与二极管Z5的另一端、接口J14的第二引脚和继电器RL8的第四引脚电连接;
    所述第五分支电路包括电阻R131、电阻R132、电阻R129、电阻R130、MOS管Q24和MOS管Q23;所述电阻R131的一端与控制芯片U7的第五十八引脚电连接,所述电阻R131的另一端分别与MOS管Q24的栅极和电阻R132的一端电连接,所述MOS管Q24的源极和电阻R132的另一端均接地;所述MOS管Q24的漏极与电阻R130的一端电连接,所述电阻R130的另一端分别与电阻R129的一端和MOS管Q23的栅极电连接,所述电阻R129的另一端与MOS管Q23的源极电连接,所述MOS管Q23的漏极接3.3V电源。
  10. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,还包括过流保护电路,所述过流保护电路包括电容C58、瓷片电容E10、电阻R99、MOS管Q18、电阻R101、三极管Q21、电阻R109、电阻R111、施密特触发器U5D、电阻R128、电阻R107、电容C66、电容C18、二极管D21、电容C62、施密特触发器U5A、电阻R25、三极管Q22、电阻R113、电阻R110、稳压二极管ZW2、电容C67、电阻R28、电阻R31、电阻R97、电阻R125、电阻R126、电阻R127、电容C76、三极管Q20、电阻R108、稳压二极管ZW3、电阻R112、电阻R98、电容C13、电容C14和稳压二极管ZW4;
    所述电容C58的一端、瓷片电容E10的一端、电阻R99的一端和MOS管Q18的源极相互连接,所述电容C58的另一端和瓷片电容E10的另一端均接地,所述MOS管Q18的栅极分别与电阻R99的另一端和电阻R101的一端电连接,所述电阻R101的另一端与三极管Q21的集电极电连接,所述三极管Q21的发射极接地,所述三极管Q21的基极分别与电阻R109的一端和电阻R111的一端电连接,所述电阻R111的另一端接地,所述电阻R109的另一端分别与施密特触发器U5D的输出端和电阻R128的一端电连接,所述电阻R128的另一端与控制芯片U7的第五十八引脚电连接,所述施密特触发器U5D的两个输入端相互连接且分别与二极管D21的负极、电阻R107的一端、电容C66的一端、电容C18的一端和电阻R125的一端电连接;所述电容C66的另一端和电容C18的另一端均接地,所述二极管D21的正极分别与电阻R107的另一端和施密特触发器U5A的输出端电连接,所述施密特触发器U5A的电源端接3.3V电源,所述施密特触发器U5A的电源端通过电容C62接地,所述施密特触发器U5A的两个输入端相互连接且分别与电阻R25的一端和三极管Q22的集电极电连接,所述电阻R25的另一端接3.3V电源,所述三极管Q22的基极分别与电阻R113的一端和稳压二极管ZW2的正极电连接,所述电阻R113的另一端和三极管Q22的发射极均接地,所述稳压二极管ZW2的负极分别与电容C67的一端、电阻R28的一端和电阻R110的一端电连接,所述电容C67的另一端分别与电阻R126的一端、电容C76的一端和电阻R97的一端电连接且均接地;所述电阻R126的另一端分别与电阻R125的另一端、电容C76的另一端和电阻R127的一端电连接,所述电阻R127的另一端与控制芯片U7的第三十五引脚电连接,所述电阻R97的另一端与电阻R31的一端电连接,所述电阻R31的另一端分别与电阻R28的另一端、电容C13的一端和电阻R98的一端电连接,所述电阻R98的另一端分别与电容C14的一端和稳压二极管ZW4的负极电连接且均与控制芯片U7的第三十五引脚电连接;所述电容C13的另一端、电容C14的另一端和稳压二极管ZW4的正极均接地;所述电阻R110的另一端与三极管Q20的集电极电连接,所述三极管Q20的基极分别与稳压二极管ZW3的负极和电阻R108的一端电连接,所述电阻R108的另一端与三极管Q20的发射极电连接;所述稳压二极管ZW3的正极通过电阻R112与M-BUS接收电路中的稳压二极管ZW11的负极电连接。
  11. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,还包括M-BUS电源电路,所述M-BUS电源电路包括瓷片电容E6、电容C51、电阻R83、电感L7、电阻R90、电阻R91、电容C56、集成芯片U10、二极管D20、电容C52、电阻R92、电容C59、电容C57、电阻R84、电阻R89、电阻R85、电阻R93、电阻R87、电容C50、电容C44、电容C45、瓷片电容E7和MOS管Q17;
    所述集成芯片U10的型号为MPQ3426;
    所述瓷片电容E6的一端、电容C51的一端、电阻R83的一端和电感L7的一端均与集成芯片U10的第三引脚电连接,所述瓷片电容E6的另一端和电容C51的另一端均接地,所述电阻R83的另一端分别与集成芯片U10的第二引脚和电阻R90的一端电连接,所述电阻R91的一端与集成芯片U10的第十四引脚电连接,所述电容C56的一端与集成芯片U10的第十二引脚电连接,所述电阻R90的另一端、电阻R91的另一端和电容C56的另一端均接地,所述集成芯片U10的第八引脚、第九引脚、第十引脚、第十一引脚和第十五引脚均接地,所述集成芯片U10的第四引脚、第五引脚和第六引脚相互连接且分别与电感L7的另一端和二极管D20的正极电连接,所述二极管D20的负极分别与电阻R84的一端、电容C50的一端、电容C44的一端、电容C45的一端和瓷片电容E7的一端电连接且均接32V电源;所述电容C44的另一端、电容C45的另一端和瓷片电容E7的另一端均接地;所述集成芯片U10的第十三引脚分别与电阻R84的另一端、电容C50的另一端、电阻R89的一端和电阻R85的一端电连接,所述电阻R89的另一端与MOS管Q17的源极电连接且均接地,所述电阻R85的另一端与MOS管Q17的漏极电连接,所述MOS管Q17的源极与电阻R93的一端电连接,所述MOS管Q17的栅极分别与电阻R93的另一端和电阻R87的一端电连接,所述电阻R87的另一端与施密特触发器U5C第十引脚电连接;所述集成芯片U10的第一引脚分别与电阻R92的一端和电容C57的一端电连接,所述电阻R92的另一端与电容C59的一端电连接,所述电容C57的另一端和电容C59的另一端均接地;所述集成芯片U10的第七引脚通过电容C52接地。
  12. 根据权利要求11所述的基于M-BUS的4G水表采集器,其特征在于,所述M-BUS电源电路还包括电容C73、电容C72、电容C74、电阻R119、集成芯片U8、电阻R118、电阻R120、电阻R121、电阻R122、电阻R123、电容C38、电容C39、电容C40、电容C41和电感L9;
    所述集成芯片U8的型号为MP2233;
    所述集成芯片U8的第一引脚通过电容C74接地;所述集成芯片U8的第二引脚通过电容C73接地且所述集成芯片U8的第二引脚接电池+BAT;所述集成芯片U8的第四引脚接地;所述集成芯片U8的第六引脚通过电阻R119接地且所述集成芯片U8的第六引脚与控制芯片U7的第五十八引脚电连接;所述集成芯片U8的第七引脚通过电容C72接地;所述集成芯片U8的第五引脚通过电阻R118与电容C38的一端电连接,所述集成芯片U8的第三引脚分别与电容C38的另一端和电感L9的一端电连接,所述电感L9的另一端、电阻R121的一端、电容C40的一端和电容C41的一端相互连接且均接3.3V电源;所述电容C40的另一端和电容C41的另一端均接地;所述集成芯片U8的第八引脚与电阻R120的一端电连接,所述电阻R120的另一端分别与电容C39的一端、电阻R122的一端和电阻R123的一端电连接,所述电容C39的另一端分别与电阻R121的另一端和电阻R122的另一端电连接,所述电阻R123的另一端接地。
  13. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,还包括存储模块,所述存储模块包括集成芯片U6;
    所述集成芯片U6的型号为AT25FS010;
    所述集成芯片U6的第一引脚与控制芯片U7的第二十六引脚电连接;
    所述集成芯片U6的第二引脚与控制芯片U7的第二十二引脚电连接;
    所述集成芯片U6的第三引脚、第七引脚和第八引脚相互连接;
    所述集成芯片U6的第四引脚接地;
    所述集成芯片U6的第五引脚与控制芯片U7的第二十三引脚电连接;
    所述集成芯片U6的第六引脚与控制芯片U7的第二十一引脚电连接。
  14. 根据权利要求13所述的基于M-BUS的4G水表采集器,其特征在于,还包括蜂鸣器模块,所述蜂鸣器模块包括电阻R70、电阻R73、三极管Q13和蜂鸣器BL1;
    所述电阻R70的一端与控制芯片U7的第二十七引脚电连接;所述电阻R70的另一端分别与电阻R73的一端和三极管Q13的基极电连接,所述电阻R73的另一端与三极管Q13的发射极电连接且均接地,所述三极管Q13的集电极与蜂鸣器BL1的一端电连接,所述蜂鸣器BL1的另一端接3.3V电源。
  15. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,还包括温度感应模块,所述温度感应模块包括电容C24、电容C25、电阻R55和热敏电阻RT1;
    所述电容C24的一端分别与电阻R55的一端和所述集成芯片U6的第三引脚电连接,所述电容C24的另一端、热敏电阻RT1的一端和电容C25的一端均接地;所述电阻R55的另一端、热敏电阻RT1的另一端和电容C25的另一端相互连接且均与控制芯片U7的第三十四引脚电连接。
  16. 根据权利要求3所述的基于M-BUS的4G水表采集器,其特征在于,还包括指示灯模块,所述指示灯模块包括发光二极管LED1、发光二极管LED2、发光二极管LED3、发光二极管LED4、发光二极管LED5、发光二极管LED6、发光二极管LED7、电阻R66、电阻R74、电阻R79、MOS管Q14、电阻R75、电阻R76和电阻R77;
    所述发光二极管LED1的正极与控制芯片U7的第五十四引脚电连接;所述发光二极管LED2的正极与控制芯片U7的第五十五引脚电连接;所述发光二极管LED3的正极与控制芯片U7的第五十六引脚电连接;所述发光二极管LED4的正极与控制芯片U7的第五十七引脚电连接;所述发光二极管LED1的负极、所述发光二极管LED2的负极、所述发光二极管LED3的负极和所述发光二极管LED4的负极相互连接且与电阻R66的一端电连接,所述电阻R66的另一端与MOS管Q14的漏极电连接,所述MOS管Q14的栅极分别与电阻R74的一端和电阻R79的一端电连接,所述电阻R74的另一端与控制芯片U7的第五十一引脚电连接,所述电阻R79的另一端和MOS管Q14的源极电连接且均接地;所述发光二极管LED5的正极、发光二极管LED6的正极和发光二极管LED7的正极均接3.3V电源,所述发光二极管LED5的负极通过电阻R75与控制芯片U7的第五十引脚电连接,所述发光二极管LED6的负极通过电阻R76与控制芯片U7的第五十二引脚电连接,所述发光二极管LED7的负极通过电阻R77与控制芯片U7的第五十三引脚电连接。
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