An intelligent control circuit for power supply of Internet of Things

Abstract

The invention discloses an intelligent control circuit for an Internet of Things power supply, comprising a threshold expansion unit, a confirmation unit, and a feedback unit. The threshold expansion unit automatically generates upper and lower thresholds of a voltage control signal based on a set reference limit value and a voltage value control signal for opening and closing a downstream port. The confirmation unit filters and confirms a control signal / interference signal fed back by a user based on the generated upper and lower thresholds. The feedback unit feeds back an opening and closing signal to the downstream port based on a confirmation result of the confirmation unit and performs self-reset when power is off. The threshold expansion unit comprises a first operational amplifier, a second operational amplifier, a sixth operational amplifier, a first resistor, a second resistor, a third resistor, a sixth resistor, a seventh resistor, a sixteenth resistor, a seventeenth resistor, and an eighteenth resistor; the first operational amplifier is connected at a common-phase end to one end of the first resistor and one end of the second resistor, and the first operational amplifier is connected at an inverting end to one end of the third resistor.

Description

Technical Field

[0001] The present invention relates to the technical field of Internet of Things control, and in particular to an Internet of Things power supply intelligent control circuit. Background Art

[0002] Publication No. CN112034744A discloses an IoT power supply intelligent control circuit, which can control the on and off of the power supplies of multiple devices by controlling relays. However, the circuit cannot automatically generate upper and lower thresholds of voltage control signals based on the set reference limits and the voltage control signals for the on and off of the downstream ports, provide a voltage control basis for the downstream ports in the IoT, improve the compatibility between devices and remote control devices, and filter and confirm the control signals / interference signals fed back by users. It cannot perform self-reset protection when the downstream ports lose power due to power fluctuations. Summary of the invention

[0003] In view of the above technical problems, the purpose of the present invention is to provide an Internet of Things power supply intelligent control circuit, including a threshold expansion unit, a confidence unit, and a feedback unit. The threshold expansion unit automatically generates upper and lower thresholds of a voltage control signal based on a set reference limit and a pressure value control signal for opening and closing a downstream port. The confidence unit filters and confirms the control signal / interference signal fed back by the user based on the generated upper and lower thresholds. The feedback unit feeds back the opening and closing signal to the downstream port based on the confirmation result of the confidence unit and performs self-reset when power is off. The threshold expansion unit includes a first operational amplifier U1, a second operational amplifier U2, a sixth operational amplifier U6, a first resistor R1, a second resistor R2, a third resistor R3, a sixth resistor R6, a seventh resistor R7, a sixteenth resistor R16, a seventeenth resistor R17, and an eighteenth resistor R18;

[0004] The in-phase end of the first operational amplifier U1 is connected to one end of the first resistor R1 and one end of the second resistor R2, the inverting end of the first operational amplifier U1 is connected to one end of the third resistor R3, the output end of the first operational amplifier U1 is connected to the other end of the third resistor R3 and one end of the sixth resistor R6, the in-phase end of the second operational amplifier U2 is connected to the other end of the sixth resistor R6 and one end of the seventh resistor R7, the in-phase end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18, the inverting end of the sixth operational amplifier U6 is connected to one end of the sixteenth resistor R16, the output end of the sixth operational amplifier U6 is connected to the other end of the seventh resistor R7 and the other end of the sixteenth resistor R16, the other end of the first resistor R1 and the other end of the seventeenth resistor R17 are connected to the power supply, and the other end of the second resistor R2 and the other end of the eighteenth resistor R18 are connected to the ground.

[0005] Further, the threshold expansion unit further includes a third operational amplifier U3, a fourth resistor R4, a fifth resistor R5, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11;

[0006] The in-phase end of the third operational amplifier U3 is connected to one end of the eighth resistor R8 and one end of the ninth resistor R9, the inverting end of the third operational amplifier U3 is connected to one end of the tenth resistor R10 and one end of the eleventh resistor R11, the output end of the third operational amplifier U3 is connected to the other end of the tenth resistor R10, one end of the fourth resistor R4 is connected to the output end of the second operational amplifier U2, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the inverting end of the second operational amplifier U2, the other end of the eighth resistor R8 is connected to the output end of the sixth operational amplifier U6, the other end of the eleventh resistor R11 is connected to the output end of the first operational amplifier U1, and the other ends of the fifth resistor R5 and the ninth resistor R9 are connected to the ground.

[0007] Further, the confirmation unit includes a fourth operational amplifier U4, a fifth operational amplifier U5, a first transistor Q1, a third transistor Q3, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a first connector P1;

[0008] The in-phase end of the fourth operational amplifier U4 is connected to the output end of the second operational amplifier U2, the inverting end of the fourth operational amplifier U4 is connected to the inverting end of the fifth operational amplifier U5 and the end of the first connector P1, the output end of the fourth operational amplifier U4 is connected to the base of the first transistor Q1 and one end of the fifteenth resistor R15, the in-phase end of the fifth operational amplifier U5 is connected to the output end of the third operational amplifier U3, the output end of the fifth operational amplifier U5 is connected to the base of the third transistor Q3 and one end of the fourteenth resistor R14, the collector of the first transistor Q1 is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the power supply, the emitter of the first transistor Q1 is connected to the emitter of the third transistor Q3, the collector of the third transistor Q3 is connected to one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13, the other end of the fourteenth resistor R14, and the other end of the fifteenth resistor R15 are connected to the ground.

[0009] Further, the confirmation unit also includes a seventh operational amplifier U7, an eighth operational amplifier U8, a second field effect transistor Q2, a fourth field effect transistor Q4, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fifth resistor R25, and a second capacitor C2;

[0010] The non-inverting end of the seventh operational amplifier U7 is connected to one end of the thirteenth resistor R13, the inverting end of the seventh operational amplifier U7 is connected to one end of the second resistor R2, the output end of the seventh operational amplifier U7 is connected to the gate of the second field effect transistor Q2, the gate of the fourth field effect transistor Q4, and one end of the nineteenth resistor R19, the non-inverting end of the eighth operational amplifier U8 is connected to the source of the second field effect transistor Q2, one end of the twenty-fifth resistor R25, and one end of the second capacitor C2, the inverting end of the eighth operational amplifier U8 is connected to one end of the twenty-second resistor R22 and one end of the twenty-third resistor R23, the drain of the fourth field effect transistor Q4 is connected to one end of the twenty-tenth resistor R20, the source of the fourth field effect transistor Q4 is connected to one end of the twenty-first resistor R21 and the other end of the twenty-fifth resistor R25, the other end of the twentieth resistor R20 and the other end of the twenty-second resistor R22 are connected to the power supply, and the drain of the second field effect transistor Q2, the other end of the nineteenth resistor R19, the other end of the twenty-first resistor R21, the other end of the twenty-third resistor R23, and the other end of the second capacitor C2 are connected to the ground.

[0011] Further, the feedback unit includes a ninth operational amplifier U9, a fifth transistor Q5, a sixth transistor Q6, a seventh field effect transistor Q7, a twenty-fourth resistor R24, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, and a first capacitor C1;

[0012] The in-phase end of the ninth operational amplifier U9 is connected to the collector of the sixth transistor Q6, one end of the twenty-seventh resistor R27, and one end of the twenty-ninth resistor R29. The inverting end of the ninth operational amplifier U9 is connected to one end of the twenty-fourth resistor R24 ​​and one end of the thirty-second resistor R32. The output end of the ninth operational amplifier U9 is connected to the end of the second connector P2. The collector of the fifth transistor Q5 is connected to one end of the twenty-sixth resistor R26, one end of the twenty-eighth resistor R28, and one end of the thirtieth resistor R30. The base of the fifth transistor Q5 is connected to the source of the seventh field effect transistor Q7 and the other end of the twenty-seventh resistor R27. The base of the transistor Q6 is connected to the other end of the 30th resistor R30, the gate of the seventh field effect transistor Q7 is connected to the output end of the eighth operational amplifier U8 and one end of the 31st resistor R31, the drain of the seventh field effect transistor Q7 is connected to the other end of the 28th resistor R28 and one end of the first capacitor C1, the other end of the 26th resistor R26, the other end of the 29th resistor R29, and the other end of the 32nd resistor R32 are connected to the power supply, and the emitter of the fifth transistor Q5, the emitter of the sixth transistor Q6, the other end of the 24th resistor R24, the other end of the 31st resistor R31, and the other end of the first capacitor C1 are connected to the ground.

[0013] Furthermore, the second resistor R2 and the eighteenth resistor R18 are adjustable resistors.

[0014] Furthermore, the nineteenth resistor R19 is used to discharge the parasitic capacitance of the gate of the second field effect transistor Q2 and the gate of the fourth field effect transistor Q4.

[0015] Furthermore, the thirty-first resistor R31 is used to discharge the parasitic capacitance of the gate of the seventh field effect transistor Q7.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] The present invention can automatically generate upper and lower thresholds of the voltage control signal based on the set reference limit and the pressure value control signal of the opening and closing of the downstream port, provide a voltage control basis for the downstream port in the Internet of Things, improve the compatibility between the device and the remote control device, and filter and confirm the control signal / interference signal fed back by the user, and can perform self-reset protection when the power fluctuation causes the downstream port to lose power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the control circuit structure provided by the present invention. DETAILED DESCRIPTION

[0020] In order to make the objects and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0021] The present invention discloses an IoT power supply intelligent control circuit, comprising a threshold expansion unit, a confidence unit, and a feedback unit. The threshold expansion unit automatically generates upper and lower thresholds of a voltage control signal based on a set reference limit value and a voltage value control signal for opening and closing a downstream port. The confidence unit filters and confirms a control signal / interference signal fed back by a user based on the generated upper and lower thresholds. The feedback unit feeds back an opening and closing signal to the downstream port based on a confirmation result of the confidence unit and performs self-reset when power is off. The threshold expansion unit comprises a first operational amplifier U1, a second operational amplifier U2, a sixth operational amplifier U6, a first resistor R1, a second resistor R2, a third resistor R3, a sixth resistor R6, a seventh resistor R7, a sixteenth resistor R16, a seventeenth resistor R17, and an eighteenth resistor R18.

[0022] The in-phase end of the first operational amplifier U1 is connected to one end of the first resistor R1 and one end of the second resistor R2, the inverting end of the first operational amplifier U1 is connected to one end of the third resistor R3, the output end of the first operational amplifier U1 is connected to the other end of the third resistor R3 and one end of the sixth resistor R6, the in-phase end of the second operational amplifier U2 is connected to the other end of the sixth resistor R6 and one end of the seventh resistor R7, the in-phase end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18, the inverting end of the sixth operational amplifier U6 is connected to one end of the sixteenth resistor R16, the output end of the sixth operational amplifier U6 is connected to the other end of the seventh resistor R7 and the other end of the sixteenth resistor R16, the other end of the first resistor R1 and the other end of the seventeenth resistor R17 are connected to the power supply, and the other end of the second resistor R2 and the other end of the eighteenth resistor R18 are connected to the ground.

[0023] Specifically, the threshold expansion unit further includes a third operational amplifier U3, a fourth resistor R4, a fifth resistor R5, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11;

[0024] The in-phase end of the third operational amplifier U3 is connected to one end of the eighth resistor R8 and one end of the ninth resistor R9, the inverting end of the third operational amplifier U3 is connected to one end of the tenth resistor R10 and one end of the eleventh resistor R11, the output end of the third operational amplifier U3 is connected to the other end of the tenth resistor R10, one end of the fourth resistor R4 is connected to the output end of the second operational amplifier U2, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the inverting end of the second operational amplifier U2, the other end of the eighth resistor R8 is connected to the output end of the sixth operational amplifier U6, the other end of the eleventh resistor R11 is connected to the output end of the first operational amplifier U1, and the other ends of the fifth resistor R5 and the ninth resistor R9 are connected to the ground.

[0025] Specifically, the confirmation unit includes a fourth operational amplifier U4, a fifth operational amplifier U5, a first transistor Q1, a third transistor Q3, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a first connector P1;

[0026] The in-phase end of the fourth operational amplifier U4 is connected to the output end of the second operational amplifier U2, the inverting end of the fourth operational amplifier U4 is connected to the inverting end of the fifth operational amplifier U5 and the end of the first connector P1, the output end of the fourth operational amplifier U4 is connected to the base of the first transistor Q1 and one end of the fifteenth resistor R15, the in-phase end of the fifth operational amplifier U5 is connected to the output end of the third operational amplifier U3, the output end of the fifth operational amplifier U5 is connected to the base of the third transistor Q3 and one end of the fourteenth resistor R14, the collector of the first transistor Q1 is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the power supply, the emitter of the first transistor Q1 is connected to the emitter of the third transistor Q3, the collector of the third transistor Q3 is connected to one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13, the other end of the fourteenth resistor R14, and the other end of the fifteenth resistor R15 are connected to the ground.

[0027] Specifically, the confirmation unit further includes a seventh operational amplifier U7, an eighth operational amplifier U8, a second field effect transistor Q2, a fourth field effect transistor Q4, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fifth resistor R25, and a second capacitor C2;

[0028] The non-inverting end of the seventh operational amplifier U7 is connected to one end of the thirteenth resistor R13, the inverting end of the seventh operational amplifier U7 is connected to one end of the second resistor R2, the output end of the seventh operational amplifier U7 is connected to the gate of the second field effect transistor Q2, the gate of the fourth field effect transistor Q4, and one end of the nineteenth resistor R19, the non-inverting end of the eighth operational amplifier U8 is connected to the source of the second field effect transistor Q2, one end of the twenty-fifth resistor R25, and one end of the second capacitor C2, the inverting end of the eighth operational amplifier U8 is connected to one end of the twenty-second resistor R22 and one end of the twenty-third resistor R23, the drain of the fourth field effect transistor Q4 is connected to one end of the twenty-tenth resistor R20, the source of the fourth field effect transistor Q4 is connected to one end of the twenty-first resistor R21 and the other end of the twenty-fifth resistor R25, the other end of the twentieth resistor R20 and the other end of the twenty-second resistor R22 are connected to the power supply, and the drain of the second field effect transistor Q2, the other end of the nineteenth resistor R19, the other end of the twenty-first resistor R21, the other end of the twenty-third resistor R23, and the other end of the second capacitor C2 are connected to the ground.

[0029] Specifically, the feedback unit includes a ninth operational amplifier U9, a fifth transistor Q5, a sixth transistor Q6, a seventh field effect transistor Q7, a twenty-fourth resistor R24, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, and a first capacitor C1;

[0030] The in-phase end of the ninth operational amplifier U9 is connected to the collector of the sixth transistor Q6, one end of the twenty-seventh resistor R27, and one end of the twenty-ninth resistor R29. The inverting end of the ninth operational amplifier U9 is connected to one end of the twenty-fourth resistor R24 ​​and one end of the thirty-second resistor R32. The output end of the ninth operational amplifier U9 is connected to the end of the second connector P2. The collector of the fifth transistor Q5 is connected to one end of the twenty-sixth resistor R26, one end of the twenty-eighth resistor R28, and one end of the thirtieth resistor R30. The base of the fifth transistor Q5 is connected to the source of the seventh field effect transistor Q7 and the other end of the twenty-seventh resistor R27. The base of the transistor Q6 is connected to the other end of the 30th resistor R30, the gate of the seventh field effect transistor Q7 is connected to the output end of the eighth operational amplifier U8 and one end of the 31st resistor R31, the drain of the seventh field effect transistor Q7 is connected to the other end of the 28th resistor R28 and one end of the first capacitor C1, the other end of the 26th resistor R26, the other end of the 29th resistor R29, and the other end of the 32nd resistor R32 are connected to the power supply, and the emitter of the fifth transistor Q5, the emitter of the sixth transistor Q6, the other end of the 24th resistor R24, the other end of the 31st resistor R31, and the other end of the first capacitor C1 are connected to the ground.

[0031] Specifically, the second resistor R2 and the eighteenth resistor R18 are adjustable resistors.

[0032] Specifically, the nineteenth resistor R19 is used to discharge the parasitic capacitance of the gate of the second field effect transistor Q2 and the gate of the fourth field effect transistor Q4.

[0033] Specifically, the thirty-first resistor R31 is used to discharge the parasitic capacitance of the gate of the seventh field effect transistor Q7.

[0034] The power supply signal reaches the ground terminal through the first resistor R1 and the second resistor R2. The signal at the second resistor R2 terminal is the reference limit. The resistance value of the second resistor R2 is adjusted for setting. The signal at the second resistor R2 terminal is fed back to the in-phase terminal of the first operational amplifier U1. The output terminal of the first operational amplifier U1 is negatively feedback connected to the inverting terminal of the first operational amplifier U1 through the third resistor R3 to prevent interference from the signal of the lower circuit while making the output terminal of the first operational amplifier U1 follow the output signal of the second resistor R2 terminal. The output terminal signal of the first operational amplifier U1 is fed back to the in-phase terminal of the second operational amplifier U2 through the sixth resistor R6. The power supply signal is connected to the ground terminal through the seventeenth resistor R17 and the eighteenth resistor R18. The signal at the end of the eighteenth resistor R18 is a voltage control signal for opening and closing the lower port. The resistance value of the eighteenth resistor R18 is adjusted for setting. The signal at the end of the eighteenth resistor R18 is fed back to the in-phase end of the sixth operational amplifier U6. The output end of the sixth operational amplifier U6 is connected to the negative feedback of the inverting end of the sixth operational amplifier U6 through the sixteenth resistor R16 and the sixth operational amplifier U6 to prevent the lower circuit signal from interfering with the output end of the sixth operational amplifier U6. The output end of the sixth operational amplifier U6 is connected to the negative feedback of the sixteenth resistor R16 and the inverting end of the sixth operational amplifier U6 to prevent the lower circuit signal from interfering with the output end of the sixth operational amplifier U6. The output end signal of the sixth operational amplifier U6 is connected to the negative feedback of the sixteenth resistor R16 and the inverting end of the sixth operational amplifier U6 to prevent the lower circuit signal from interfering with the output end of the sixth operational amplifier U6. The seventh resistor R7 is fed back to the in-phase terminal of the second operational amplifier U2, the output terminal signal of the second operational amplifier U2 is fed to the ground terminal through the fourth resistor R4 and the fifth resistor R5, the signal of the fifth resistor R5 terminal is fed back to the inverting terminal of the second operational amplifier U2, the output terminal of the second operational amplifier U2 is shifted upward to output the voltage value control signal of the opening and closing of the downlink port, and the offset value is the amplitude of the signal at the second resistor R2 terminal, and at the same time, the output terminal signal of the first operational amplifier U1 is fed back to the inverting terminal of the third operational amplifier U3 through the eleventh resistor R11, and the output terminal of the third operational amplifier U3 is fed back to the inverting terminal of the third operational amplifier U3 through the tenth resistor R10 and the third operational amplifier The inverting terminal of the amplifier U3 is negatively feedback connected, the signal of the output terminal of the sixth operational amplifier U6 is connected to the ground terminal through the eighth resistor R8 and the ninth resistor R9, and the signal of the ninth resistor R9 terminal is fed back to the non-inverting terminal of the third operational amplifier U3, and the output terminal of the third operational amplifier U3 is offset downward to output the voltage value control signal for opening and closing the downstream port, and the offset value is the signal amplitude of the second resistor R2 terminal, so that the threshold expansion unit can automatically generate the upper and lower thresholds of the voltage control signal based on the set reference limit and the voltage value control signal for opening and closing the downstream port, providing a voltage control basis for the downstream port in the Internet of Things, and improving the compatibility between the device and the remote control device.

[0035] The control signal is fed back by the user, and the signal can be transmitted and fed back by the wireless transceiver module. A control circuit is set in each downlink port, and the signal is fed back to the first connector P1 of the confirmation unit on the control circuit in all downlink ports in the same network domain. When the first connector P1 end obtains signal feedback and the signal is not interfered with, and the signal amplitude is within the upper and lower thresholds of the generated voltage control signal, the signal at the first connector P1 end is fed back to the inverting end of the fourth operational amplifier U4 and the inverting end of the fifth operational amplifier U5, the signal at the output end of the second operational amplifier U2 is fed back to the non-inverting end of the fourth operational amplifier U4, the signal at the output end of the third operational amplifier U3 is fed back to the non-inverting end of the fifth operational amplifier U5, the fifth operational amplifier U5 is cut off, and the fourth operational amplifier The output of the fourth operational amplifier U4 is transmitted, the signal at the output end of the fourth operational amplifier U4 is transmitted to the ground via the fifteenth resistor R15, the signal at the end of the fifteenth resistor R15 is transmitted to the ground via the base of the first transistor Q1, the emitter of the first transistor Q1, the emitter of the third transistor Q3, the base of the third transistor Q3, and the fourteenth resistor R14, the base of the first transistor Q1 and the emitter of the first transistor Q1 are forward biased, the first transistor Q1 is turned on, the emitter of the third transistor Q3 and the base of the third transistor Q3 are forward biased, the third transistor Q3 is turned on, the power supply signal is transmitted via the twelfth resistor R12, the collector of the first transistor Q1, the emitter of the first transistor Q1, the emitter of the third transistor Q3, the collector of the third transistor Q3, the thirteenth resistor R13 to the ground, the first The signal at the thirteenth resistor R13 end is fed back to the non-inverting end of the seventh operational amplifier U7, the signal at the second resistor R2 end is fed back to the inverting end of the seventh operational amplifier U7, the seventh operational amplifier U7 outputs, and the signal at the output end of the seventh operational amplifier U7 is fed back to the gate of the second field effect transistor Q2 and the gate of the fourth field effect transistor Q4. The nineteenth resistor R19 is used to discharge the parasitic capacitance of the gate of the second field effect transistor Q2 and the gate of the fourth field effect transistor Q4. The voltage difference between the gate of the second field effect transistor Q2 and the source of the second field effect transistor Q2 is higher than the conduction threshold, the second field effect transistor Q2 is cut off, the voltage difference between the gate of the fourth field effect transistor Q4 and the source of the fourth field effect transistor Q4 is higher than the conduction threshold, the fourth field effect transistor Q4 is turned on, and the power supply signal is passed through the twentieth resistor R20 and the twenty-first resistor R30. The resistor R21 is connected to the ground terminal, the signal at the end of the twenty-first resistor R21 increases the potential of the second capacitor C2 after passing through the twenty-fifth resistor R25, the power signal passes through the twenty-second resistor R22 and the twenty-third resistor R23 to the ground terminal, the signal at the end of the twenty-third resistor R23 is fed back to the inverting end of the eighth operational amplifier U8, when the signal at the end of the second capacitor C2 increases and its amplitude is higher than the signal at the end of the twenty-third resistor R23, the eighth operational amplifier U8 outputs, and the output end of the eighth operational amplifier U8 is the function start and close signal required by the downlink port, when the potential of the second capacitor C2 increases and the eighth operational amplifier U8 does not output, the signal at the end of the first connector P1 is interfered and its amplitude is offset upward and higher than the upper threshold of the upper and lower thresholds of the generated voltage value control signal,The fourth operational amplifier U4, the seventh operational amplifier U7, and the fourth field effect tube Q4 are turned off, the second field effect tube Q2 is turned on, the signal at the second capacitor C2 end passes through the source of the second field effect tube Q2 and the drain of the second field effect tube Q2 to the ground end, and the potential at the second capacitor C2 end drops to the ground potential. When the signal at the first connector P1 end is interfered with so that its amplitude shifts downward and is lower than the lower threshold of the upper and lower thresholds of the generated voltage value control signal, the fifth operational amplifier U5 outputs, the third transistor Q3 is turned off, the second field effect tube Q2 is turned on, and the potential at the second capacitor C2 end drops to the ground potential. The response speed of the control signal is adjusted by adjusting the capacitance of the second capacitor C2 or the signal amplitude at the twenty-third resistor R23 end, so as to prevent signal interference and the input of the corresponding voltage-controlled amplitude signal set in the control circuit of the non-downlink port from causing the downlink port to be opened and closed incorrectly when the remote device feeds back the control signal to control the downlink port. At the same time, the user can adjust the response speed of the control signal according to the use environment. The smaller the signal interference environment, the higher the adjustable response speed.

[0036] In the initial state, the power signal passes through the twenty-sixth resistor R26 and then passes through the twenty-eighth resistor R28 to increase the potential of the first capacitor C1, and the other path passes through the thirtieth resistor R30, the sixth transistor Q6 base, the sixth transistor Q6 emitter to the ground terminal, the sixth transistor Q6 is turned on, the power signal passes through the twenty-ninth resistor R29, the sixth transistor Q6 collector, the sixth transistor Q6 emitter to the ground terminal, the sixth transistor Q6 collector terminal potential is lower than the fifth transistor Q5 collector terminal potential, when the eighth operational amplifier U8 outputs, the output terminal signal of the eighth operational amplifier U8 is fed back to the gate of the seventh field effect transistor Q7, the thirty-first resistor R31 is used to discharge the parasitic capacitance of the gate of the seventh field effect transistor Q7, the voltage difference between the gate of the seventh field effect transistor Q7 and the source of the seventh field effect transistor Q7 is higher than the turn-on threshold, the seventh field effect transistor Q7 is turned on, the signal at the end of the first capacitor C1 passes through the base of the fifth transistor Q5, the fifth transistor Q5 emitter to the ground terminal, the fifth transistor Q5 The fifth transistor Q5 is turned on, the collector terminal potential of the fifth transistor Q5 is pulled down, the collector terminal potential of the sixth transistor Q6 is increased, the collector terminal signal of the sixth transistor Q6 is fed back to the in-phase terminal of the ninth operational amplifier U9, the power signal is connected to the ground terminal through the thirty-second resistor R32 and the twenty-fourth resistor R24, the signal at the end of the twenty-fourth resistor R24 ​​is fed back to the inverting terminal of the ninth operational amplifier U9, the ninth operational amplifier U9 outputs, and the output terminal signal of the ninth operational amplifier U9 is fed back to the relay of the lower port through the second connector P2, the relay is energized, and the equipment obtains the power signal. When the eighth operational amplifier U8 outputs again, the collector terminal potential of the fifth transistor Q5 is increased, the collector terminal potential of the sixth transistor Q6 is decreased, the ninth operational amplifier U9 is cut off, and the lower port performs corresponding opening and closing operations based on the output / cutoff of the ninth operational amplifier U9. When the control circuit is powered on again after power failure, the feedback unit is restored to the initial state to prevent the lower port from being repeatedly opened and closed following power fluctuations and causing damage to the equipment.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An IoT power supply intelligent control circuit, comprising a threshold expansion unit, a confirmation unit, and a feedback unit, characterized in that: The threshold expansion unit automatically generates upper and lower thresholds of the voltage control signal based on the set reference limit and the pressure value control signal of the downstream port opening and closing, the confirmation unit filters and confirms the control signal / interference signal fed back by the user based on the generated upper and lower thresholds, and the feedback unit feeds back the opening and closing signal of the downstream port based on the confirmation result of the confirmation unit and performs self-reset when power is off, and the threshold expansion unit includes a first operational amplifier, a second operational amplifier, a sixth operational amplifier, a first resistor, a second resistor, a third resistor, a sixth resistor, a seventh resistor, a sixteenth resistor, a seventeenth resistor, and an eighteenth resistor; The first operational amplifier is connected in phase with one end of the first resistor and one end of the second resistor, the first operational amplifier is connected in phase with one end of the third resistor, the first operational amplifier output is connected with the other end of the third resistor and one end of the sixth resistor, the second operational amplifier is connected in phase with the other end of the sixth resistor and one end of the seventh resistor, the sixth operational amplifier is connected in phase with one end of the seventeenth resistor and one end of the eighteenth resistor, the sixth operational amplifier is connected in phase with one end of the sixteenth resistor, the sixth operational amplifier is connected in phase with one end of the sixteenth resistor, the sixth operational amplifier is connected in phase with one end of the sixteenth resistor, the sixth operational amplifier output is connected with the other end of the seventh resistor and the other end of the sixteenth resistor, the other end of the first resistor and the other end of the seventeenth resistor are connected to the power supply, and the other end of the second resistor and the other end of the eighteenth resistor are connected to the ground; the threshold expansion unit also includes a third operational amplifier, a fourth resistor, a fifth resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor; The in-phase end of the third operational amplifier is connected to one end of the eighth resistor and one end of the ninth resistor, the inverting end of the third operational amplifier is connected to one end of the tenth resistor and one end of the eleventh resistor, the output end of the third operational amplifier is connected to the other end of the tenth resistor, one end of the fourth resistor is connected to the output end of the second operational amplifier, the other end of the fourth resistor is connected to one end of the fifth resistor and the inverting end of the second operational amplifier, the other end of the eighth resistor is connected to the output end of the sixth operational amplifier, the other end of the eleventh resistor is connected to the output end of the first operational amplifier, and the other end of the fifth resistor and the other end of the ninth resistor are connected to the ground end; the confirmation unit includes a fourth operational amplifier, a fifth operational amplifier, a first transistor, a third transistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a first connector; The in-phase end of the fourth operational amplifier is connected to the output end of the second operational amplifier, the inverting end of the fourth operational amplifier is connected to the inverting end of the fifth operational amplifier and the first connector end, the output end of the fourth operational amplifier is connected to the base of the first transistor and one end of the fifteenth resistor, the in-phase end of the fifth operational amplifier is connected to the output end of the third operational amplifier, the output end of the fifth operational amplifier is connected to the base of the third transistor and one end of the fourteenth resistor, the collector of the first transistor is connected to one end of the twelfth resistor, the other end of the twelfth resistor is connected to the power supply, the emitter of the first transistor is connected to the emitter of the third transistor, the collector of the third transistor is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor, the other end of the fourteenth resistor, and the other end of the fifteenth resistor are connected to the ground end; the confirmation unit also includes a seventh operational amplifier, an eighth operational amplifier, a second field effect transistor, a fourth field effect transistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, and a second capacitor; The non-inverting end of the seventh operational amplifier is connected to one end of the thirteenth resistor, the inverting end of the seventh operational amplifier is connected to one end of the second resistor, the output end of the seventh operational amplifier is connected to the second field effect transistor gate, the fourth field effect transistor gate, and one end of the nineteenth resistor, the non-inverting end of the eighth operational amplifier is connected to the second field effect transistor source, one end of the twenty-fifth resistor, and one end of the second capacitor, the inverting end of the eighth operational amplifier is connected to one end of the twenty-second resistor, and one end of the twenty-third resistor, the drain of the fourth field effect transistor is connected to one end of the twenty-tenth resistor, the source of the fourth field effect transistor is connected to one end of the twenty-first resistor and the other end of the twenty-fifth resistor, the other end of the twentieth resistor and the other end of the twenty-second resistor are connected to the power supply, and the drain of the second field effect transistor, the other end of the nineteenth resistor, the other end of the twenty-first resistor, the other end of the twenty-third resistor, and the other end of the second capacitor are connected to the ground terminal; the feedback unit includes a ninth operational amplifier, a fifth transistor, a sixth transistor, a seventh field effect transistor, a twenty-fourth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, and a first capacitor; The non-inverting end of the ninth operational amplifier is connected to the collector of the sixth transistor, one end of the twenty-seventh resistor, and one end of the twenty-ninth resistor, the inverting end of the ninth operational amplifier is connected to one end of the twenty-fourth resistor and one end of the thirty-second resistor, the output end of the ninth operational amplifier is connected to the second connector end, the collector of the fifth transistor is connected to one end of the twenty-sixth resistor, one end of the twenty-eighth resistor, and one end of the thirtieth resistor, the base of the fifth transistor is connected to the source of the seventh field effect transistor and the other end of the twenty-seventh resistor, the base of the sixth transistor is connected to the other end of the thirtieth resistor, the gate of the seventh field effect transistor is connected to the output end of the eighth operational amplifier and one end of the thirty-first resistor, the drain of the seventh field effect transistor is connected to the other end of the twenty-eighth resistor and one end of the first capacitor, the other end of the twenty-sixth resistor, the other end of the twenty-ninth resistor, and the other end of the thirty-second resistor are connected to the power supply, and the emitter of the fifth transistor, the emitter of the sixth transistor, the other end of the twenty-fourth resistor, the other end of the thirty-first resistor, the other end of the first capacitor are connected to the ground end.

2. The IoT power supply intelligent control circuit according to claim 1, characterized in that: The second resistor and the eighteenth resistor are adjustable resistors.

3. The IoT power supply intelligent control circuit according to claim 1, characterized in that: The nineteenth resistor is used to discharge the parasitic capacitance of the second field effect transistor gate and the fourth field effect transistor gate.

4. The IoT power supply intelligent control circuit according to claim 1, characterized in that: The thirty-first resistor is used to discharge the parasitic capacitance of the gate of the seventh field effect transistor.

Images