Control circuit of phenology intelligent monitoring system

Abstract

The utility model discloses a phenology intelligent monitoring system control circuit, which comprises a control module, an SD card module, a wireless communication module, a remote cloud platform and a voltage conversion circuit, an SD communication interface and a wireless communication interface are arranged in the control module, the SD communication interface is connected with the SD card module, the wireless communication interface is connected with the wireless communication module, and the remote cloud platform is connected with the voltage conversion circuit. The wireless communication module is in communication connection with a remote cloud platform; the voltage conversion circuit comprises a voltage reduction unit, a voltage stabilization unit and a resonance generation unit, the input end of the voltage reduction unit is connected to a direct-current power supply 12V, the output end of the voltage reduction unit is connected to the voltage stabilization unit, and the output end of the voltage reduction unit is connected with the voltage stabilization unit to form the direct-current output end of the voltage conversion circuit. The DC output end of the voltage conversion circuit is connected to the resonance generation unit. The phenology intelligent monitoring system control circuit solves the problem that wireless communication connection to a remote cloud platform cannot be realized in the prior art.

Description

Technical Field

[0001] The utility model relates to a control circuit, in particular to a control circuit of a phenological intelligent monitoring system. Background Art

[0002] Phenology refers to the phenomenon that organisms adapt to the periodic changes in light, precipitation, temperature and other conditions over a long period of time, forming corresponding growth and development rhythms.

[0003] The intelligent phenological detection system includes: a monitoring controller, monitoring sensors and a signal processing circuit. The monitoring sensors include: temperature sensors, humidity sensors, wind direction sensors, wind speed sensors, etc., which are used to monitor the plant growth temperature, humidity, wind direction, wind speed, etc. The output end of the monitoring sensor is connected to the input end of the signal processing circuit, and the output end of the signal processing circuit is connected to the input end of the monitoring controller, thereby realizing intelligent monitoring of the plant growth environment.

[0004] However, the phenological intelligent monitoring system still has the following shortcomings: it cannot realize wireless communication to connect to the remote cloud platform, resulting in the inability to view the monitoring data at any time through mobile terminals such as mobile phones, which brings trouble to management work. Utility Model Content

[0005] The utility model aims to provide a control circuit for a phenological intelligent monitoring system, which solves the problem in the prior art that wireless communication cannot be achieved to connect to a remote cloud platform.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The utility model discloses a control circuit of a phenological intelligent monitoring system, comprising: a control module, an SD card module, a wireless communication module, a remote cloud platform and a voltage conversion circuit, wherein an SD communication interface and a wireless communication interface are provided in the control module, the SD communication interface is connected to the SD card module, the wireless communication interface is connected to the wireless communication module, and the wireless communication module is connected to the remote cloud platform; the voltage conversion circuit comprises: a step-down unit, a voltage stabilizing unit and a resonance generating unit, the input end of the step-down unit is connected to a DC power supply 12V, the output end of the step-down unit is connected to the voltage stabilizing unit, the output end of the step-down unit is connected to the voltage stabilizing unit to form a DC output end of the voltage conversion circuit, the DC output end of the voltage conversion circuit is connected to the resonance generating unit, the DC output end of the voltage conversion circuit is connected to the resonance generating unit to form a resonant output end of the voltage conversion circuit; the DC output end of the voltage conversion circuit supplies power to the DC voltage end of the control module, and the resonant output end of the voltage conversion circuit supplies power to the resonant voltage end of the control module.

[0008] Preferably, a current limiting circuit is installed between the DC output terminal of the voltage conversion circuit and the resonance generating unit.

[0009] Preferably, the control circuit of the phenological intelligent monitoring system also includes: a controlled switch group, a switch drive circuit and a voltage detection circuit; the controlled switch group includes: a first single-pole double-throw switch, a second single-pole double-throw switch and a control unit, the fixed end of the first single-pole double-throw switch is used to connect to the DC voltage end of the control module, the fixed end of the second single-pole double-throw switch is used to connect to the resonant voltage end of the control module, the normally closed end of the first single-pole double-throw switch is connected to the normally open end of the second single-pole double-throw switch to form a first connection end, the normally closed end of the second single-pole double-throw switch is connected to the normally open end of the first single-pole double-throw switch to form a second connection end, the first connection end and the second connection end are respectively connected to the input end and the output end of the current limiting circuit, and the first single-pole double-throw switch and the second single-pole double-throw switch operate under the control of the control unit; the DC power supply 12V supplies power to the control unit through the switch drive circuit, and the switch drive circuit control end is connected to the first output end of the control module; the resonant voltage end of the control module is connected to the input end of the voltage detection circuit, and the output end of the voltage detection circuit is connected to the first input end of the control module.

[0010] Preferably, the buck unit includes: a capacitor C1 and a buck chip U1, the DC power supply 12V is connected to the input end of the buck chip U1 and the positive electrode of the capacitor C1, the negative electrode of the capacitor C1 is grounded, and the output end of the buck chip U1 is the output end of the buck unit.

[0011] Preferably, the voltage stabilizing unit includes: a voltage stabilizing diode D1, an inductor L1, a capacitor C2 and an electrolytic capacitor C3, the cathode of the voltage stabilizing diode D1 and the first end of the inductor L1 are both connected to the output end of the step-down unit, the second end of the inductor L1 is the DC output end of the voltage conversion circuit, the second end of the inductor L1 is connected to the positive electrode of the capacitor C2 and the positive electrode of the electrolytic capacitor C3, and the negative electrode of the capacitor C2 and the negative electrode of the electrolytic capacitor C3 are both grounded.

[0012] Preferably, the current limiting circuit includes: a diode D2, an anode of the diode D2 is an input end of the current limiting circuit, and a cathode of the diode D2 is an output end of the current limiting circuit.

[0013] Preferably, the resonance generating unit includes: an inductor L2 and a capacitor C4, the first end of the inductor L2 and the positive electrode of the capacitor C4 are both connected to the output end of the current limiting circuit, the first end of the inductor L2 and the positive electrode of the capacitor C4 are connected to form the resonant output end of the voltage conversion circuit, and the second end of the inductor L2 and the negative electrode of the capacitor C4 are both grounded.

[0014] Preferably, the switch drive circuit includes: a resistor R2 and a transistor Q1, the base of the transistor Q1 is the control end of the switch drive circuit, the DC power supply 12V is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the collector of the transistor Q1 through the control unit, and the emitter of the transistor Q1 is grounded.

[0015] Preferably, the voltage detection circuit includes: a capacitor C5, a resistor R1, a resistor R3, a resistor R4 and a comparator U2, the positive electrode of the capacitor C5 is the input end of the voltage detection circuit, the negative electrode of the capacitor C5 is grounded through the resistor R1, the negative electrode of the capacitor C5 is connected to the non-inverting input end of the comparator U2, the inverting input end of the comparator U2 is connected to the second end of the resistor R3, the first end of the resistor R3 is connected to the DC power supply 12V, the second end of the resistor R3 is grounded through the resistor R4, and the output end of the comparator U2 is the output end of the voltage detection circuit.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) In this application, by setting up an SD card module and a wireless communication module, wireless communication between the control module and the remote cloud platform is achieved, so that external mobile terminals such as mobile phones can view monitoring data by accessing the remote cloud platform, which brings convenience to monitoring and management work.

[0018] 2) Since this product provides a 12V DC power supply, and the operating voltage of the SD card module and wireless communication module is 3.3V, a step-down unit is used to reduce the 12V to 3.3V, and the voltage stabilization unit stabilizes the output at 3.3V. However, under conditions such as wireless transmission, a resonant frequency needs to be provided. Therefore, a resonance generating unit is added to provide the resonant frequency, which provides conditions for the resonant input terminal of the control module to input the resonant frequency. Therefore, a DC output terminal and a resonant output terminal are formed in the voltage conversion circuit.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a circuit diagram of the voltage conversion circuit, the controlled switch group, the switch drive circuit, and the voltage detection circuit. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0022] like Figure 1As shown, the utility model discloses a control circuit of a phenological intelligent monitoring system, including: a control module, an SD card module, a wireless communication module, a remote cloud platform and a voltage conversion circuit. The control module is provided with an SD communication interface and a wireless communication interface. The SD communication interface is connected to the SD card module, the wireless communication interface is connected to the wireless communication module, and the wireless communication module is communicated with the remote cloud platform; the voltage conversion circuit includes: a step-down unit, a voltage stabilizing unit and a resonance generating unit. The input end of the step-down unit is connected to the VCC DC power supply 12V, the output end of the step-down unit is connected to the voltage stabilizing unit, the output end of the step-down unit is connected to the voltage stabilizing unit to form a DC output end of the voltage conversion circuit, the DC output end of the voltage conversion circuit is connected to the resonance generating unit, and the DC output end of the voltage conversion circuit is connected to the resonance generating unit to form a resonant output end of the voltage conversion circuit; the DC output end of the voltage conversion circuit supplies power to the DC voltage end of the control module, and the resonant output end of the voltage conversion circuit supplies power to the resonant voltage end of the control module.

[0023] A current limiting circuit is installed between the DC output terminal of the voltage conversion circuit and the resonance generating unit. Due to the setting of the current limiting circuit, the resonant current generated by the resonance generating unit is prevented from flowing back to the step-down unit and causing damage to the step-down unit, thereby protecting the step-down unit.

[0024] The control circuit of the phenological intelligent monitoring system also includes: a controlled switch group, a switch drive circuit and a voltage detection circuit; the controlled switch group includes: a first single-pole double-throw switch, a second single-pole double-throw switch and a control unit, the fixed end of the first single-pole double-throw switch is used to connect to the DC voltage end of the control module, the fixed end of the second single-pole double-throw switch is used to connect to the resonant voltage end of the control module, the normally closed end of the first single-pole double-throw switch is connected to the normally open end of the second single-pole double-throw switch to form a first connection end, the normally closed end of the second single-pole double-throw switch is connected to the normally open end of the first single-pole double-throw switch to form a second connection end, the first connection end and the second connection end are respectively connected to the input end and the output end of the current limiting circuit, and the first single-pole double-throw switch and the second single-pole double-throw switch operate under the control of the control unit; the DC power supply 12V supplies power to the control unit through the switch drive circuit, and the switch drive circuit control end is connected to the first output end of the control module; the resonant voltage end of the control module is connected to the input end of the voltage detection circuit, and the output end of the voltage detection circuit is connected to the first input end of the control module.

[0025] The buck unit includes capacitor C1 and buck chip U1. A 12V DC power supply is connected to the input terminal VIN of buck chip U1 and the positive terminal of capacitor C1. The negative terminal of capacitor C1 is grounded. The output terminal OUT of buck chip U1 is the output terminal of the buck unit. Buck chip U1 performs the step-down function, reducing the 12V voltage to 3.3V.

[0026] The voltage stabilizing unit includes a voltage stabilizing diode D1, an inductor L1, a capacitor C2, and an electrolytic capacitor C3. The cathode of the voltage stabilizing diode D1 and the first end of the inductor L1 are both connected to the output of the step-down unit. The second end of the inductor L1 is the DC output of the voltage conversion circuit. The second end of the inductor L1 is connected to the positive electrode of the capacitor C2 and the positive electrode of the electrolytic capacitor C3. The negative electrode of the capacitor C2 and the negative electrode of the electrolytic capacitor C3 are both grounded. The voltage stabilizing diode D1, inductor L1, capacitor C2, and electrolytic capacitor C3 all have a voltage stabilizing function.

[0027] The current limiting circuit includes a diode D2, wherein the anode of the diode D2 is the input terminal of the current limiting circuit and the cathode of the diode D2 is the output terminal of the current limiting circuit. Diode D2 can only allow current to flow from the anode to the cathode, thereby playing a current limiting role.

[0028] The resonance generating unit includes an inductor L2 and a capacitor C4. The first end of the inductor L2 and the positive electrode of the capacitor C4 are both connected to the output end of the current limiting circuit. The first end of the inductor L2 and the positive electrode of the capacitor C4 are connected to form the resonant output end of the voltage conversion circuit. The second end of the inductor L2 and the negative electrode of the capacitor C4 are both grounded. The inductor L2 and the capacitor C4 are connected in parallel to generate a resonant frequency.

[0029] The switch drive circuit includes: a resistor R2 and a transistor Q1, the base of the transistor Q1 is the control end of the switch drive circuit, a DC power supply 12V is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the collector of the transistor Q1 through the control unit, and the emitter of the transistor Q1 is grounded.

[0030] The voltage detection circuit includes: capacitor C5, resistor R1, resistor R3, resistor R4 and comparator U2. The positive electrode of capacitor C5 is the input end of the voltage detection circuit, the negative electrode of capacitor C5 is grounded through resistor R1, the negative electrode of capacitor C5 is connected to the non-inverting input end of comparator U2, the inverting input end of comparator U2 is connected to the second end of resistor R3, the first end of resistor R3 is connected to a DC power supply of 12V, the second end of resistor R3 is grounded through resistor R4, and the output end of comparator U2 is the output end of the voltage detection circuit. Capacitor C5 has the effect of passing AC and blocking DC. The controlled switch group is relay RL1. Under normal circumstances, the control part of the controlled switch group is not energized, the fixed end of the first single-pole double-throw switch is connected to the normally closed end, and the fixed end of the second single-pole double-throw switch is connected to the normally closed end. If the first connection end and the second connection end are correctly connected (that is, the first connection end is connected to the DC output end of the voltage conversion circuit, and the second connection end is connected to the resonant output end of the voltage conversion circuit), then there is voltage at the negative pole of capacitor C5 and the output voltage is X1. After the resistors R3 and R4 divide the voltage, the voltage output from the second end of resistor R3 is X2. X2 provides a reference voltage for the comparator U2. At this time, when X1 is greater than X2, the comparator U2 outputs a high level. The control module knows that the resonant voltage end VDA1 has been connected to the resonant voltage output by the resonance generating unit, and determines that the first connection end and the second connection end are correctly connected. When the first connection terminal and the second connection terminal are connected incorrectly (that is, the second connection terminal is connected to the DC output terminal of the voltage conversion circuit, and the first connection terminal is connected to the resonant output terminal of the voltage conversion circuit), the negative electrode of the capacitor C5 has a voltage and the output voltage is 0. After the resistors R3 and R4 divide the voltage, the voltage output from the second end of the resistor R3 is X2, and X2 provides a reference voltage for the comparator U2. At this time, when X1 is less than X2, the comparator U2 outputs a high level, and the control module knows that the resonant voltage terminal VDA1 is not connected to the resonant voltage output by the resonance generating unit, and determines whether the first connection terminal and the second connection terminal are connected. If the second connection terminal is connected incorrectly, the control module controls the base of the transistor Q1 to be connected to a high level, the control unit is powered on, the fixed end of the first single-pole double-throw switch is connected to the normally open end, and the fixed end of the second single-pole double-throw switch is connected to the normally open end, and the connection relationship is switched to realize the connection of the resonant voltage terminal VDA1 to the resonant voltage and the DC voltage terminal VDD1 to the DC voltage, thereby realizing automatic detection and automatic switching of the first connection terminal and the second connection terminal, avoiding the phenomenon of disordered connection caused by too long a connection line between the control module and the voltage conversion circuit, and ensuring the correct connection of the resonant voltage and the DC voltage.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. The control circuit of the phenological intelligent monitoring system is characterized by: include: A control module, an SD card module, a wireless communication module, a remote cloud platform, and a voltage conversion circuit. The control module is provided with an SD communication interface and a wireless communication interface. The SD communication interface is connected to the SD card module, the wireless communication interface is connected to the wireless communication module, and the wireless communication module is connected to the remote cloud platform. The voltage conversion circuit includes: a step-down unit, a voltage stabilizing unit, and a resonance generating unit. The input end of the step-down unit is connected to a 12V DC power supply, the output end of the step-down unit is connected to the voltage stabilizing unit, the output end of the step-down unit is connected to the voltage stabilizing unit to form a DC output end of the voltage conversion circuit, the DC output end of the voltage conversion circuit is connected to the resonance generating unit, and the DC output end of the voltage conversion circuit is connected to the resonance generating unit to form a resonance output end of the voltage conversion circuit. The DC output end of the voltage conversion circuit supplies power to the DC voltage end of the control module, and the resonant output end of the voltage conversion circuit supplies power to the resonant voltage end of the control module.

2. The phenological intelligent monitoring system control circuit according to claim 1, characterized in that: A current limiting circuit is installed between the DC output end of the voltage conversion circuit and the resonance generating unit.

3. The phenological intelligent monitoring system control circuit according to claim 2, characterized in that: Also includes: Controlled switch group, switch drive circuit and voltage detection circuit; The controlled switch group includes: a first single-pole double-throw switch, a second single-pole double-throw switch, and a control unit. The fixed terminal of the first single-pole double-throw switch is used to connect to the DC voltage terminal of the control module, and the fixed terminal of the second single-pole double-throw switch is used to connect to the resonant voltage terminal of the control module. The normally closed terminal of the first single-pole double-throw switch is connected to the normally open terminal of the second single-pole double-throw switch to form a first connection terminal. The normally closed terminal of the second single-pole double-throw switch is connected to the normally open terminal of the first single-pole double-throw switch to form a second connection terminal. The first connection terminal and the second connection terminal are respectively connected to the input terminal and the output terminal of the current limiting circuit. The first single-pole double-throw switch and the second single-pole double-throw switch operate under the control of the control unit. The DC power supply 12V supplies power to the control unit through the switch drive circuit, and the switch drive circuit control terminal is connected to the first output terminal of the control module; The resonant voltage terminal of the control module is connected to the input terminal of the voltage detection circuit, and the output terminal of the voltage detection circuit is connected to the first input terminal of the control module.

4. The phenological intelligent monitoring system control circuit according to claim 3, characterized in that: The buck unit includes: capacitor C1 and buck chip U1, the DC power supply 12V is connected to the input end of the buck chip U1 and the positive electrode of capacitor C1, the negative electrode of capacitor C1 is grounded, and the output end of the buck chip U1 is the output end of the buck unit.

5. The phenological intelligent monitoring system control circuit according to claim 4, characterized in that: The voltage stabilizing unit includes: a voltage stabilizing diode D1, an inductor L1, a capacitor C2 and an electrolytic capacitor C3. The cathode of the voltage stabilizing diode D1 and the first end of the inductor L1 are both connected to the output end of the step-down unit. The second end of the inductor L1 is the DC output end of the voltage conversion circuit. The second end of the inductor L1 is connected to the positive electrode of the capacitor C2 and the positive electrode of the electrolytic capacitor C3. The negative electrode of the capacitor C2 and the negative electrode of the electrolytic capacitor C3 are both grounded.

6. The phenological intelligent monitoring system control circuit according to claim 5, characterized in that: The current limiting circuit includes: a diode D2, an anode of the diode D2 is an input end of the current limiting circuit, and a cathode of the diode D2 is an output end of the current limiting circuit.

7. The phenological intelligent monitoring system control circuit according to claim 6, characterized in that: The resonance generating unit includes: an inductor L2 and a capacitor C4, the first end of the inductor L2 and the positive electrode of the capacitor C4 are both connected to the output end of the current limiting circuit, the first end of the inductor L2 and the positive electrode of the capacitor C4 are connected to form the resonant output end of the voltage conversion circuit, and the second end of the inductor L2 and the negative electrode of the capacitor C4 are both grounded.

8. The phenological intelligent monitoring system control circuit according to claim 7, characterized in that: The switch drive circuit includes: a resistor R2 and a transistor Q1, the base of the transistor Q1 is the control end of the switch drive circuit, a DC power supply 12V is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the collector of the transistor Q1 through the control unit, and the emitter of the transistor Q1 is grounded.

9. The phenological intelligent monitoring system control circuit according to claim 8, characterized in that: The voltage detection circuit includes: capacitor C5, resistor R1, resistor R3, resistor R4 and comparator U2. The positive electrode of capacitor C5 is the input end of the voltage detection circuit, the negative electrode of capacitor C5 is grounded through resistor R1, the negative electrode of capacitor C5 is connected to the non-inverting input end of comparator U2, the inverting input end of comparator U2 is connected to the second end of resistor R3, the first end of resistor R3 is connected to a DC power supply of 12V, the second end of resistor R3 is grounded through resistor R4, and the output end of comparator U2 is the output end of the voltage detection circuit.

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