A temperature and humidity monitoring device

Abstract

The utility model relates to the technical field of temperature and humidity monitoring, and in particular to a temperature and humidity monitoring device, comprising a temperature and humidity control unit and a plurality of temperature and humidity sensing units, the temperature and humidity control unit comprising a first main control circuit and a plurality of load output circuits, the first main control circuit being electrically connected to the plurality of load output circuits respectively, the number of the load output circuits being equal to the number of the temperature and humidity sensing units, each temperature and humidity sensing unit comprising a temperature detection circuit, a humidity detection circuit and a second main control circuit, the second main control circuit being electrically connected to the temperature detection circuit and the humidity detection circuit respectively, the first main control circuit and the second main control circuit being wirelessly connected, and multi-channel temperature and humidity monitoring and effective regulation of ambient temperature and humidity can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature and humidity monitoring, in particular to a temperature and humidity monitoring device. Background Art

[0002] In the field of power and electrical equipment, in order to adapt to different working environments, such as special fields such as high or low temperature, high dust, etc., some switch cabinets, instrument cabinets, etc. must adopt a closed design to ensure the normal operation of some electrical components, but water vapor is still inevitable, especially in rainy areas and high temperature difference areas. The increase in humidity and temperature changes in the air have a more serious impact on some electrical components, which directly affects the life of the electrical components and can even cause the collapse of the entire system. Therefore, temperature and humidity monitoring devices must be installed in these switch cabinets or instrument cabinets; the temperature and humidity monitoring devices currently used have automatic monitoring functions, but are generally large in size and can only monitor or start loads in local areas inside switch cabinets or instrument cabinets, resulting in the inability to balance the temperature and humidity differences within the unit volume, which will lead to inaccurate monitoring of the overall space, and at the same time, multi-channel monitoring cannot be performed, which is not conducive to centralized management and confirmation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a temperature and humidity monitoring device which can realize multi-channel temperature and humidity monitoring and effective regulation of ambient temperature and humidity.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A temperature and humidity monitoring device comprises a temperature and humidity control unit and a plurality of temperature and humidity sensing units, wherein the temperature and humidity control unit comprises a first main control circuit and a plurality of load output circuits, wherein the first main control circuit is electrically connected to the plurality of load output circuits respectively, and the number of the load output circuits is equal to the number of the temperature and humidity sensing units, wherein each of the temperature and humidity sensing units comprises a temperature detection circuit, a humidity detection circuit and a second main control circuit, wherein the second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively, and the first main control circuit and the second main control circuit are connected wirelessly.

[0006] Furthermore, the temperature detection circuit includes a resistor R34, a thermistor U29, a diode D23 and a capacitor C148, one end of the resistor R34 is electrically connected to the cathode of the diode D23, and one end of the resistor R34 and the cathode of the diode D23 are both connected to a 3.3V power supply, the other end of the resistor R34 is respectively electrically connected to the anode of the diode D23, one end of the thermistor U29, one end of the capacitor C148 and the second main control circuit, the other end of the thermistor U29 is electrically connected to the other end of the capacitor C148, and the other end of the thermistor U29 and the other end of the capacitor C148 are both grounded.

[0007] Furthermore, the humidity detection circuit includes a resistor R35, a humidity-sensitive resistor U30, a diode D24 and a capacitor C149, one end of the resistor R35 is electrically connected to the cathode of the diode D24, and one end of the resistor R35 and the cathode of the diode D24 are both connected to a 3.3V power supply, the other end of the resistor R35 is respectively electrically connected to the anode of the diode D24, one end of the humidity-sensitive resistor U30, one end of the capacitor C149 and the second main control circuit, the other end of the humidity-sensitive resistor U30 is electrically connected to the other end of the capacitor C149, and the other end of the humidity-sensitive resistor U30 and the other end of the capacitor C149 are both grounded.

[0008] Furthermore, the load output circuit includes a resistor R2, a resistor R6, a transistor Q1, a diode D2 and a relay K1, one end of the coil of the relay K1 is electrically connected to the anode of the diode D2 and the collector of the transistor Q1, respectively, the other end of the coil of the relay K1 is electrically connected to the cathode of the diode D2, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and one end of the resistor R6, respectively, the other end of the resistor R2 is electrically connected to the first main control circuit, and the other end of the resistor R6 is grounded.

[0009] Furthermore, the second main control circuit includes a chip U32, a spring antenna A8, a first crystal oscillator module, a first reset module and a first LC filter module. The model of the chip U32 is CC1310. The twenty-first pin of the chip U32 is electrically connected to the first reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U32 are all electrically connected to the first crystal oscillator module. The first LC filter module is respectively electrically connected to the spring antenna A8, the first pin of the chip U32, the second pin of the chip U32 and the fourth pin of the chip U32. The ninth pin of the chip U32 is electrically connected to the temperature detection circuit, and the tenth pin of the chip U32 is electrically connected to the humidity detection circuit.

[0010] Furthermore, the first main control circuit includes a chip U3, a spring antenna A1, a second crystal oscillator module, a second reset module and a second LC filter module. The model of the chip U3 is CC1310. The twenty-first pin of the chip U3 is electrically connected to the second reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U3 are all electrically connected to the second crystal oscillator module. The second LC filter module is respectively electrically connected to the spring antenna A1, the first pin of the chip U3, the second pin of the chip U3 and the fourth pin of the chip U3. The eighth pin of the chip U3 is electrically connected to the load output circuit.

[0011] Furthermore, the temperature and humidity sensing unit also includes a battery-powered conversion circuit, and the battery-powered conversion circuit is electrically connected to the temperature detection circuit, the humidity detection circuit and the second main control circuit respectively.

[0012] Furthermore, the battery-powered conversion circuit includes a battery BT8, a capacitor C138, a voltage stabilizing chip U26, a capacitor C136, a capacitor C137 and a diode D20. The model of the voltage stabilizing chip U26 is ME6209A233M3G. The first pin of the voltage stabilizing chip U26 is electrically connected to one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137, and one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137 are all grounded. The second pin of the voltage stabilizing chip U26 is electrically connected to the anode of the diode D20, the other end of the capacitor C136, the other end of the capacitor C137, the temperature detection circuit, the humidity detection circuit and the second main control circuit. The third pin of the voltage stabilizing chip U26 is electrically connected to the cathode of the diode D20, the other end of the capacitor C138 and the positive electrode of the battery BT8, and the negative electrode of the battery BT8 is grounded.

[0013] Furthermore, the temperature and humidity sensing unit also includes a battery power monitoring circuit, and the battery power monitoring circuit is electrically connected to the battery power conversion circuit and the second main control circuit respectively.

[0014] Furthermore, the battery power monitoring circuit includes a resistor R37, a resistor R38 and a capacitor C150, one end of the resistor R37 is electrically connected to the battery power conversion circuit, the other end of the resistor R37 is electrically connected to one end of the resistor R38, one end of the capacitor C150 and the second main control circuit respectively, the other end of the resistor R38 is electrically connected to the other end of the capacitor C150, and the other end of the resistor R38 and the other end of the capacitor C150 are both grounded.

[0015] The beneficial effects of the utility model are:

[0016] The present solution is provided with a temperature and humidity control unit and several temperature and humidity sensing units. The temperature and humidity control unit includes a first main control circuit and several load output circuits. The first main control circuit is electrically connected to the several load output circuits respectively, so that the first main control circuit can respectively control the multiple load output circuits to realize multiple load outputs. The number of load output circuits is equal to the number of temperature and humidity sensing units. Each temperature and humidity sensing unit includes a temperature detection circuit, a humidity detection circuit and a second main control circuit. The second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively. The temperature detection circuit is responsible for detecting the ambient temperature value and transmitting it to the second main control circuit. The humidity detection circuit is responsible for detecting the ambient humidity value and transmitting it to the second main control circuit. The first main control circuit and the second main control circuit are connected wirelessly. The second main control circuit transmits the temperature values ​​and humidity values ​​of the multiple environments to the first main control circuit respectively by wireless communication, thereby realizing multiple temperature and humidity monitoring. Moreover, the multiple temperature and humidity sensing units can respectively link the multiple load output circuits and control them accordingly, thereby realizing effective regulation of ambient temperature and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a module connection block diagram of the temperature and humidity monitoring device of the utility model;

[0018] Figure 2 It is a circuit schematic diagram of the temperature detection circuit of the temperature and humidity monitoring device of the utility model;

[0019] Figure 3 It is a circuit schematic diagram of the humidity detection circuit of the temperature and humidity monitoring device of the utility model;

[0020] Figure 4 It is a circuit schematic diagram of the second main control circuit of the temperature and humidity monitoring device of the utility model;

[0021] Figure 5 It is a circuit schematic diagram of the second main control circuit of the temperature and humidity monitoring device of the utility model;

[0022] Figure 6 It is a circuit schematic diagram of the load output circuit of the temperature and humidity monitoring device of the utility model;

[0023] Figure 7 It is a circuit schematic diagram of the first main control circuit of the temperature and humidity monitoring device of the utility model;

[0024] Figure 8 It is a circuit schematic diagram of the first main control circuit of the temperature and humidity monitoring device of the utility model;

[0025] Fig. 9 It is a circuit principle diagram of the battery power supply conversion circuit of the temperature and humidity monitoring device of the utility model;

[0026] Fig.10 It is a circuit schematic diagram of a battery power monitoring circuit of a temperature and humidity monitoring device of the utility model;

[0027] Fig.11 It is a circuit schematic diagram of the power conversion circuit of the temperature and humidity monitoring device of the utility model;

[0028] Description of labels:

[0029] 1. Temperature and humidity control unit; 101. First main control circuit; 102. Load output circuit; 103. Power conversion circuit; 2. Temperature and humidity sensing unit; 201. Temperature detection circuit; 202. Humidity detection circuit; 203. Second main control circuit; 204. Battery power conversion circuit; 205. Battery charge monitoring circuit. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0031] Please refer to Figure 1 , the technical solution adopted by the utility model is:

[0032] A temperature and humidity monitoring device comprises a temperature and humidity control unit and a plurality of temperature and humidity sensing units, wherein the temperature and humidity control unit comprises a first main control circuit and a plurality of load output circuits, wherein the first main control circuit is electrically connected to the plurality of load output circuits respectively, and the number of the load output circuits is equal to the number of the temperature and humidity sensing units, wherein each of the temperature and humidity sensing units comprises a temperature detection circuit, a humidity detection circuit and a second main control circuit, wherein the second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively, and the first main control circuit and the second main control circuit are connected wirelessly.

[0033] From the above description, it can be seen that the beneficial effects of the utility model are:

[0034] The present solution is provided with a temperature and humidity control unit and several temperature and humidity sensing units. The temperature and humidity control unit includes a first main control circuit and several load output circuits. The first main control circuit is electrically connected to the several load output circuits respectively, so that the first main control circuit can respectively control the multiple load output circuits to realize multiple load outputs. The number of load output circuits is equal to the number of temperature and humidity sensing units. Each temperature and humidity sensing unit includes a temperature detection circuit, a humidity detection circuit and a second main control circuit. The second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively. The temperature detection circuit is responsible for detecting the ambient temperature value and transmitting it to the second main control circuit. The humidity detection circuit is responsible for detecting the ambient humidity value and transmitting it to the second main control circuit. The first main control circuit and the second main control circuit are connected wirelessly. The second main control circuit transmits the temperature values ​​and humidity values ​​of the multiple environments to the first main control circuit respectively by wireless communication, thereby realizing multiple temperature and humidity monitoring. Moreover, the multiple temperature and humidity sensing units can respectively link the multiple load output circuits and control them accordingly, thereby realizing effective regulation of ambient temperature and humidity.

[0035] Furthermore, the temperature detection circuit includes a resistor R34, a thermistor U29, a diode D23 and a capacitor C148, one end of the resistor R34 is electrically connected to the cathode of the diode D23, and one end of the resistor R34 and the cathode of the diode D23 are both connected to a 3.3V power supply, the other end of the resistor R34 is respectively electrically connected to the anode of the diode D23, one end of the thermistor U29, one end of the capacitor C148 and the second main control circuit, the other end of the thermistor U29 is electrically connected to the other end of the capacitor C148, and the other end of the thermistor U29 and the other end of the capacitor C148 are both grounded.

[0036] From the above description, it can be seen that the thermistor U29 can reflect the ambient temperature value through resistance changes; the diode D23 can protect the voltage at the WD_SEN point from being too large, and the capacitor C148 makes the voltage at the WD_SEN point more stable; when the ambient temperature changes, the voltage at the WD_SEN point can be converted into the ambient temperature value by collecting it, and its voltage = 3.3V*U29 / (U29+R34).

[0037] Furthermore, the humidity detection circuit includes a resistor R35, a humidity-sensitive resistor U30, a diode D24 and a capacitor C149, one end of the resistor R35 is electrically connected to the cathode of the diode D24, and one end of the resistor R35 and the cathode of the diode D24 are both connected to a 3.3V power supply, the other end of the resistor R35 is respectively electrically connected to the anode of the diode D24, one end of the humidity-sensitive resistor U30, one end of the capacitor C149 and the second main control circuit, the other end of the humidity-sensitive resistor U30 is electrically connected to the other end of the capacitor C149, and the other end of the humidity-sensitive resistor U30 and the other end of the capacitor C149 are both grounded.

[0038] From the above description, it can be seen that the humidity-sensitive resistor U30 can reflect the ambient humidity value through resistance changes; the diode D24 can protect the voltage at the SD_SEN point from being too large, and the capacitor C149 makes the voltage at the SD_SEN point more stable; when the ambient humidity changes, the voltage at the SD_SEN point can be converted into the ambient humidity value by collecting it, and its voltage = 3.3V*U30 / (U30+R35).

[0039] Furthermore, the load output circuit includes a resistor R2, a resistor R6, a transistor Q1, a diode D2 and a relay K1, one end of the coil of the relay K1 is electrically connected to the anode of the diode D2 and the collector of the transistor Q1, respectively, the other end of the coil of the relay K1 is electrically connected to the cathode of the diode D2, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and one end of the resistor R6, respectively, the other end of the resistor R2 is electrically connected to the first main control circuit, and the other end of the resistor R6 is grounded.

[0040] From the above description, it can be seen that resistor R2 can provide a base current to drive transistor Q1 to turn on; when JDQ_IN1=1, a small current flows through resistor R2, and resistor R6 is a ground discharge resistor, which can prevent JDQ_IN1 from having a floating voltage and causing transistor Q1 to malfunction; when transistor Q1 is turned on, the two ends of the coil of relay K1 will form a loop through transistor Q1 to be turned on and attracted; at this time, relay K1 will act and change the node state; the actual site can control the start and stop function of the load by connecting to the node; when JDQ_IN1=0, the coil of relay K1 is released, and the node acts again, and the actual site can control the start and stop function of the load by connecting to the node.

[0041] Furthermore, the second main control circuit includes a chip U32, a spring antenna A8, a first crystal oscillator module, a first reset module and a first LC filter module. The model of the chip U32 is CC1310. The twenty-first pin of the chip U32 is electrically connected to the first reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U32 are all electrically connected to the first crystal oscillator module. The first LC filter module is respectively electrically connected to the spring antenna A8, the first pin of the chip U32, the second pin of the chip U32 and the fourth pin of the chip U32. The ninth pin of the chip U32 is electrically connected to the temperature detection circuit, and the tenth pin of the chip U32 is electrically connected to the humidity detection circuit.

[0042] Furthermore, the first main control circuit includes a chip U3, a spring antenna A1, a second crystal oscillator module, a second reset module and a second LC filter module. The model of the chip U3 is CC1310. The twenty-first pin of the chip U3 is electrically connected to the second reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U3 are all electrically connected to the second crystal oscillator module. The second LC filter module is respectively electrically connected to the spring antenna A1, the first pin of the chip U3, the second pin of the chip U3 and the fourth pin of the chip U3. The eighth pin of the chip U3 is electrically connected to the load output circuit.

[0043] Furthermore, the temperature and humidity sensing unit also includes a battery-powered conversion circuit, and the battery-powered conversion circuit is electrically connected to the temperature detection circuit, the humidity detection circuit and the second main control circuit respectively.

[0044] From the above description, it can be known that the battery power conversion circuit is used to convert the battery into the voltage required by the system.

[0045] Furthermore, the battery-powered conversion circuit includes a battery BT8, a capacitor C138, a voltage stabilizing chip U26, a capacitor C136, a capacitor C137 and a diode D20. The model of the voltage stabilizing chip U26 is ME6209A233M3G. The first pin of the voltage stabilizing chip U26 is electrically connected to one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137, and one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137 are all grounded. The second pin of the voltage stabilizing chip U26 is electrically connected to the anode of the diode D20, the other end of the capacitor C136, the other end of the capacitor C137, the temperature detection circuit, the humidity detection circuit and the second main control circuit. The third pin of the voltage stabilizing chip U26 is electrically connected to the cathode of the diode D20, the other end of the capacitor C138 and the positive electrode of the battery BT8, and the negative electrode of the battery BT8 is grounded.

[0046] From the above description, we can know that battery BT8 is responsible for the power input of the whole system; capacitor C138 can prevent battery voltage fluctuations from affecting the stability of the back-end power supply; voltage regulator chip U26 can convert 3.7V to DC 3.3V for the whole system; diode D20 can prevent sudden changes in back-end voltage; capacitors C136 and C137 make the voltage more stable.

[0047] Furthermore, the temperature and humidity sensing unit also includes a battery power monitoring circuit, and the battery power monitoring circuit is electrically connected to the battery power conversion circuit and the second main control circuit respectively.

[0048] It can be seen from the above description that the battery power monitoring circuit is used to measure the remaining battery power and report the battery voltage to the second main control circuit at a regular interval.

[0049] Furthermore, the battery power monitoring circuit includes a resistor R37, a resistor R38 and a capacitor C150, one end of the resistor R37 is electrically connected to the battery power conversion circuit, the other end of the resistor R37 is electrically connected to one end of the resistor R38, one end of the capacitor C150 and the second main control circuit respectively, the other end of the resistor R38 is electrically connected to the other end of the capacitor C150, and the other end of the resistor R38 and the other end of the capacitor C150 are both grounded.

[0050] Please refer to Figures 1 to 11 , Embodiment 1 of the present utility model is:

[0051] Please refer to Figure 1 A temperature and humidity monitoring device comprises a temperature and humidity control unit 1 and a plurality of temperature and humidity sensing units 2, wherein the temperature and humidity control unit 1 comprises a first main control circuit 101 and a plurality of load output circuits 102, wherein the first main control circuit 101 is electrically connected to the plurality of load output circuits 102 respectively, and the number of the load output circuits 102 is equal to the number of the temperature and humidity sensing units 2, and each of the temperature and humidity sensing units 2 comprises a temperature detection circuit 201, a humidity detection circuit 202 and a second main control circuit 203, wherein the second main control circuit 203 is electrically connected to the temperature detection circuit 201 and the humidity detection circuit 202 respectively, and the first main control circuit 101 and the second main control circuit 203 are connected wirelessly.

[0052] Please refer to Figure 2 The temperature detection circuit 201 includes a resistor R34, a thermistor U29, a diode D23 and a capacitor C148, one end of the resistor R34 is electrically connected to the cathode of the diode D23 and one end of the resistor R34 and the cathode of the diode D23 are both connected to a 3.3V power supply, the other end of the resistor R34 is electrically connected to the anode of the diode D23, one end of the thermistor U29, one end of the capacitor C148 and the second main control circuit 203, respectively, the other end of the thermistor U29 is electrically connected to the capacitor C148 The other end of the thermistor U29 and the other end of the capacitor C148 are electrically connected and are grounded; the thermistor U29 can reflect the ambient temperature value through resistance changes; the diode D23 is a clamping diode to protect the voltage at the WD_SEN point from being too large, and the capacitor C148 is a filter capacitor to make the voltage at the WD_SEN point more stable; when the ambient temperature changes, the voltage at the WD_SEN point can be converted into the ambient temperature value by collecting the voltage, and its voltage = 3.3V*U29 / (U29+R34).

[0053] Please refer to Figure 3The humidity detection circuit 202 includes a resistor R35, a humidity-sensitive resistor U30, a diode D24 and a capacitor C149, one end of the resistor R35 is electrically connected to the cathode of the diode D24 and one end of the resistor R35 and the cathode of the diode D24 are both connected to a 3.3V power supply, the other end of the resistor R35 is electrically connected to the anode of the diode D24, one end of the humidity-sensitive resistor U30, one end of the capacitor C149 and the second main control circuit 203, and the other end of the humidity-sensitive resistor U30 is electrically connected to the capacitor C149 The other end of the humidifier U30 is electrically connected and the other end of the humidifier U30 and the other end of the capacitor C149 are both grounded; the humidifier U30 can reflect the ambient humidity value through resistance changes; the diode D24 is a clamping diode to protect the voltage at the SD_SEN point from being too large, and the capacitor C149 is a filter capacitor to make the voltage at the SD_SEN point more stable; when the ambient humidity changes, the voltage at the SD_SEN point can be converted into the ambient humidity value by collecting the voltage, and its voltage = 3.3V*U30 / (U30+R35).

[0054] Please refer to Figure 6 , the load output circuit 102 includes a resistor R2, a resistor R6, a transistor Q1, a diode D2 and a relay K1, one end of the coil of the relay K1 is electrically connected to the anode of the diode D2 and the collector of the transistor Q1, the other end of the coil of the relay K1 is electrically connected to the cathode of the diode D2, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and one end of the resistor R6, the other end of the resistor R2 is electrically connected to the first main control circuit 101, and the other end of the resistor R6 is grounded; in this embodiment, there are eight load output circuits 102, corresponding to 1-8 wireless temperature and humidity sensor units 2, for example, the temperature of the first temperature and humidity sensor unit 2 is lower than 5°C or wet When the temperature is higher than 80%RH, the load output circuit 102 will be driven to work; the resistor R2 is a current limiting resistor, which provides a base current to drive the transistor Q1 to turn on; when JDQ_IN1=1, a small current flows through the resistor R2, and the resistor R6 is a ground discharge resistor, which can prevent the floating voltage in JDQ_IN1 from causing the transistor Q1 to malfunction; when the transistor Q1 is turned on, the two ends of the coil of the relay K1 will form a loop through the transistor Q1 to be turned on and attracted; at this time, the relay K1 will act and change the node state; the actual site can control the start and stop function of the load by accessing the node; when JDQ_IN1=0, the coil of the relay K1 is released, and the node acts again, and the actual site can control the start and stop function of the load by accessing the node.

[0055] Please refer to Figure 4The second main control circuit 203 includes a chip U32, a spring antenna A8, a first crystal oscillator module, a first reset module and a first LC filter module. The model of the chip U32 is CC1310. The twenty-first pin of the chip U32 is electrically connected to the first reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U32 are all electrically connected to the first crystal oscillator module. The first LC filter module is electrically connected to the spring antenna A8, the first pin of the chip U32, the second pin of the chip U32 and the fourth pin of the chip U32 respectively. The ninth pin of the chip U32 is electrically connected to the temperature detection circuit 201, and the tenth pin of the chip U32 is electrically connected to the humidity detection circuit 202.

[0056] Please refer to Figure 4 , the first crystal oscillator module includes a first crystal oscillator submodule and a second crystal oscillator submodule, the first crystal oscillator submodule includes a crystal oscillator Y16, a capacitor C173 and a capacitor C174, and the second crystal oscillator submodule includes a crystal oscillator Y15, a capacitor C175 and a capacitor C176;

[0057] Please refer to Figure 4 The first LC filter module includes four first LC filters for filtering the RF signal, namely, inductor L42 and capacitor C152, inductor L48 and capacitor C167, inductor L45 and capacitor C164, and inductor L46 and capacitor C165.

[0058] Please refer to Figure 4 The second main control circuit 203 also includes capacitor C55, capacitor C166, capacitor C161 and inductor L47. Capacitor C55, capacitor C166 and capacitor C161 are all low-filter capacitors that play a role in protecting signal stability. Inductor L47 is used to prevent high-order harmonics generated by oscillation from interfering with the power supply and protect the chip pins.

[0059] Please refer to Figure 4 The first reset module includes a resistor R40 and a capacitor C163.

[0060] Spring antenna A8 is used to receive and transmit radio electromagnetic wave signals; since the chip model CC1310 has its own radio frequency function, the required radio frequency peripheral circuit is relatively simple. This circuit is a 433MHz wireless communication circuit, in which RX / TX, RF_P, and RF_N are respectively connected to the fourth pin, the first pin, and the second pin of the chip U32. When RX / TX is high, RF_P and RF_N send data outward; when RX_TX is low, RF_P and RF_N receive data sent from the outside; after the system collects the ambient temperature and humidity values ​​through this wireless communication circuit, in order to consider the battery life, a timed reporting mechanism is used to upload the data through the 433MHz wireless communication circuit.

[0061] Please refer to Figure 5 The second main control circuit 203 also includes an inductor L38, a capacitor C145, a capacitor C146 and a capacitor C147. DCDC_SW is the DC voltage switching level of the chip U32. The inductor L38 is a filter inductor that can prevent excessive voltage mutations from affecting the stability of the back-end voltage. The capacitors C145, C146 and C147 are all filter capacitors, making the voltage more stable.

[0062] Please refer to Figure 7 The first main control circuit 101 includes a chip U3, a spring antenna A1, a second crystal oscillator module, a second reset module and a second LC filter module. The model of the chip U3 is CC1310. The twenty-first pin of the chip U3 is electrically connected to the second reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U3 are all electrically connected to the second crystal oscillator module. The second LC filter module is electrically connected to the spring antenna A1, the first pin of the chip U3, the second pin of the chip U3 and the fourth pin of the chip U3 respectively. The eighth pin of the chip U3 is electrically connected to the load output circuit 102.

[0063] Please refer to Figure 7 , the second crystal oscillator module includes a third crystal oscillator submodule and a fourth crystal oscillator submodule, the third crystal oscillator submodule includes a crystal oscillator Y2, a capacitor C17 and a capacitor C18, and the fourth crystal oscillator submodule includes a crystal oscillator Y1, a capacitor C19 and a capacitor C20;

[0064] Please refer to Figure 7 The second LC filter module includes four second LC filters for filtering the radio frequency signal, namely, inductor L3 and capacitor C8, inductor L7 and capacitor C15, inductor L4 and capacitor C12, and inductor L5 and capacitor C13.

[0065] Please refer to Figure 7 The first main control circuit 101 also includes capacitor C9, capacitor C10, capacitor C14 and inductor L6. Capacitor C9, capacitor C10 and capacitor C14 are all low-filter capacitors that play a role in protecting signal stability. Inductor L6 is used to prevent high-order harmonics generated by oscillation from interfering with the power supply and protect the chip pins.

[0066] Please refer to Figure 7 The second reset module includes a resistor R10 and a capacitor C11.

[0067] Spring antenna A1 is used to receive and transmit radio electromagnetic wave signals; since the chip model CC1310 has its own radio frequency function, the required radio frequency peripheral circuit is relatively simple. The circuit is a 433MHz wireless communication circuit, in which RX / TX, RF_P, and RF_N are respectively connected to the fourth pin, the first pin, and the second pin of the chip U3. When RX / TX is high, RF_P and RF_N send data outward; when RX_TX is low, RF_P and RF_N receive data sent from the outside; the system receives the ambient temperature and humidity data of 1-8 wireless temperature and humidity sensor units 2 through this wireless communication circuit, analyzes and processes the data inside the local microcontroller, and links 1-8 load output circuits 102 according to the temperature and humidity data of each channel to achieve independent control and accurate identification.

[0068] Please refer to Figure 8 The first main control circuit 101 also includes an inductor L2, a capacitor C5, a capacitor C6 and a capacitor C7. DCDC_SW is the DC voltage switching level of the chip U3. The inductor L2 is a filter inductor that can prevent excessive voltage mutations from affecting the stability of the back-end voltage. The capacitors C5, C6 and C7 are all filter capacitors, making the voltage more stable.

[0069] Please refer to Figure 1 The temperature and humidity sensing unit 2 also includes a battery power conversion circuit 204, and the battery power conversion circuit 204 is electrically connected to the temperature detection circuit 201, the humidity detection circuit 202 and the second main control circuit 203 respectively.

[0070] Please refer to Fig. 9The battery powered conversion circuit 204 includes a battery BT8, a capacitor C138, a voltage stabilizing chip U26, a capacitor C136, a capacitor C137 and a diode D20. The model of the voltage stabilizing chip U26 is ME6209A233M3G. The first pin of the voltage stabilizing chip U26 is electrically connected to one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137 respectively, and one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137 are all grounded. The second pin of the voltage stabilizing chip U26 is electrically connected to the anode of the diode D20, the anode of the capacitor C136 and the The other end, the other end of capacitor C137, the temperature detection circuit 201, the humidity detection circuit 202 and the second main control circuit 203 are electrically connected, and the third pin of the voltage stabilizing chip U26 is electrically connected to the cathode of diode D20, the other end of capacitor C138 and the positive electrode of battery BT8 respectively, and the negative electrode of battery BT8 is grounded; battery BT8 is a lithium battery, responsible for the power supply input of the whole system, and the battery capacity is 3.7V; capacitor C138 is an input filter capacitor, which can prevent battery voltage fluctuations from affecting the stability of the back-end power supply; the voltage stabilizing chip U26 is an LDO chip, which can convert 3.7V to DC 3.3V for use by the entire system; diode D20 is a freewheeling diode to prevent sudden changes in the back-end voltage; capacitor C136 and capacitor C137 are DC3.3V output voltage filter capacitors, which make the voltage more stable.

[0071] Please refer to Figure 1 The temperature and humidity sensing unit 2 also includes a battery power monitoring circuit 205, and the battery power monitoring circuit 205 is electrically connected to the battery power conversion circuit 204 and the second main control circuit 203 respectively.

[0072] Please refer to Fig.10 The battery power monitoring circuit 205 includes a resistor R37, a resistor R38 and a capacitor C150, one end of the resistor R37 is electrically connected to the battery power conversion circuit 204, the other end of the resistor R37 is electrically connected to one end of the resistor R38, one end of the capacitor C150 and the second main control circuit 203 respectively, the other end of the resistor R38 is electrically connected to the other end of the capacitor C150, and the other end of the resistor R38 and the other end of the capacitor C150 are both grounded.

[0073] Please refer to Figure 1 The temperature and humidity control unit 1 also includes a power conversion circuit 103, which is responsible for converting the mains 220V into the working voltage required by the system. The power conversion circuit 103 includes an inductor L1, a resistor R1, a chip U2, a capacitor C3, a capacitor C1, a diode D1, a chip U1, a capacitor C2 and a capacitor C46. For the specific connection relationship between the components, please refer to Fig.11; L and N are the live wire and neutral wire of the external input voltage ACV220V, and the inductor L1 is a filter inductor, which can prevent the AC voltage fluctuation from affecting the back-end circuit; the chip U2 is an AC-DC power module, which can convert AC 220V into DC 5V for system use; capacitor C3 and capacitor C1 are 5V filter capacitors, which make the voltage smoother; inductor D1 is a transient suppression diode, which can clamp the 5V input voltage below 7V, and can prevent voltage fluctuations from affecting the stability of the back-end power supply; chip U1 is a DC-DC LDO chip, which can convert 5V voltage into DC 3.3V for system use; capacitor C2 and capacitor C4 are 3.3V filter capacitors, which make the voltage smoother.

[0074] In summary, the utility model provides a temperature and humidity monitoring device, which is provided with a temperature and humidity control unit and a plurality of temperature and humidity sensing units. The temperature and humidity control unit includes a first main control circuit and a plurality of load output circuits. The first main control circuit is electrically connected to the plurality of load output circuits respectively, so that the first main control circuit can respectively control the multi-channel load output circuits to realize multi-channel load output; the number of load output circuits is equal to the number of temperature and humidity sensing units, each temperature and humidity sensing unit includes a temperature detection circuit, a humidity detection circuit and a second main control circuit, the second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively, the temperature detection circuit is responsible for detecting the ambient temperature value and transmitting it to the second main control circuit; the humidity detection circuit is responsible for detecting the ambient humidity value and transmitting it to the second main control circuit; and the first main control circuit and the second main control circuit are connected wirelessly, and the second main control circuit transmits the temperature value and humidity value of the multi-channel environment to the first main control circuit respectively by wireless communication, thereby realizing multi-channel temperature and humidity monitoring; and the multi-channel temperature and humidity sensing units can respectively link the multi-channel load output circuits and control them accordingly, thereby realizing effective regulation of ambient temperature and humidity.

[0075] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A temperature and humidity monitoring device, characterized in that: It includes a temperature and humidity control unit and several temperature and humidity sensing units. The temperature and humidity control unit includes a first main control circuit and several load output circuits. The first main control circuit is electrically connected to the several load output circuits respectively. The number of the load output circuits is equal to the number of the temperature and humidity sensing units. Each of the temperature and humidity sensing units includes a temperature detection circuit, a humidity detection circuit and a second main control circuit. The second main control circuit is electrically connected to the temperature detection circuit and the humidity detection circuit respectively. The first main control circuit and the second main control circuit are connected wirelessly.

2. The temperature and humidity monitoring device according to claim 1, characterized in that: The temperature detection circuit includes a resistor R34, a thermistor U29, a diode D23 and a capacitor C148, one end of the resistor R34 is electrically connected to the cathode of the diode D23, and one end of the resistor R34 and the cathode of the diode D23 are both connected to a 3.3V power supply, the other end of the resistor R34 is respectively electrically connected to the anode of the diode D23, one end of the thermistor U29, one end of the capacitor C148 and the second main control circuit, the other end of the thermistor U29 is electrically connected to the other end of the capacitor C148, and the other end of the thermistor U29 and the other end of the capacitor C148 are both grounded.

3. The temperature and humidity monitoring device according to claim 1, characterized in that: The humidity detection circuit includes a resistor R35, a humidity-sensitive resistor U30, a diode D24 and a capacitor C149, one end of the resistor R35 is electrically connected to the cathode of the diode D24, and one end of the resistor R35 and the cathode of the diode D24 are both connected to a 3.3V power supply, the other end of the resistor R35 is respectively electrically connected to the anode of the diode D24, one end of the humidity-sensitive resistor U30, one end of the capacitor C149 and the second main control circuit, the other end of the humidity-sensitive resistor U30 is electrically connected to the other end of the capacitor C149, and the other end of the humidity-sensitive resistor U30 and the other end of the capacitor C149 are both grounded.

4. The temperature and humidity monitoring device according to claim 1, characterized in that: The load output circuit includes a resistor R2, a resistor R6, a transistor Q1, a diode D2 and a relay K1, one end of the coil of the relay K1 is electrically connected to the anode of the diode D2 and the collector of the transistor Q1, respectively, the other end of the coil of the relay K1 is electrically connected to the cathode of the diode D2, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and one end of the resistor R6, respectively, the other end of the resistor R2 is electrically connected to the first main control circuit, and the other end of the resistor R6 is grounded.

5. The temperature and humidity monitoring device according to claim 1, characterized in that: The second main control circuit includes a chip U32, a spring antenna A8, a first crystal oscillator module, a first reset module and a first LC filter module. The model of the chip U32 is CC1310. The twenty-first pin of the chip U32 is electrically connected to the first reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U32 are all electrically connected to the first crystal oscillator module. The first LC filter module is respectively electrically connected to the spring antenna A8, the first pin of the chip U32, the second pin of the chip U32 and the fourth pin of the chip U32. The ninth pin of the chip U32 is electrically connected to the temperature detection circuit, and the tenth pin of the chip U32 is electrically connected to the humidity detection circuit.

6. The temperature and humidity monitoring device according to claim 1, characterized in that: The first main control circuit includes a chip U3, a spring antenna A1, a second crystal oscillator module, a second reset module and a second LC filter module. The model of the chip U3 is CC1310. The twenty-first pin of the chip U3 is electrically connected to the second reset module. The fifth pin, the sixth pin, the thirtieth pin and the thirty-first pin of the chip U3 are all electrically connected to the second crystal oscillator module. The second LC filter module is respectively electrically connected to the spring antenna A1, the first pin of the chip U3, the second pin of the chip U3 and the fourth pin of the chip U3. The eighth pin of the chip U3 is electrically connected to the load output circuit.

7. The temperature and humidity monitoring device according to claim 1, characterized in that: The temperature and humidity sensing unit further comprises a battery-powered conversion circuit, and the battery-powered conversion circuit is electrically connected to the temperature detection circuit, the humidity detection circuit and the second main control circuit respectively.

8. The temperature and humidity monitoring device according to claim 7, characterized in that: The battery-powered conversion circuit includes a battery BT8, a capacitor C138, a voltage stabilizing chip U26, a capacitor C136, a capacitor C137 and a diode D20. The model of the voltage stabilizing chip U26 is ME6209A233M3G. The first pin of the voltage stabilizing chip U26 is electrically connected to one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137, and one end of the capacitor C138, one end of the capacitor C136 and one end of the capacitor C137 are all grounded. The second pin of the voltage stabilizing chip U26 is electrically connected to the anode of the diode D20, the other end of the capacitor C136, the other end of the capacitor C137, the temperature detection circuit, the humidity detection circuit and the second main control circuit. The third pin of the voltage stabilizing chip U26 is electrically connected to the cathode of the diode D20, the other end of the capacitor C138 and the positive electrode of the battery BT8, and the negative electrode of the battery BT8 is grounded.

9. The temperature and humidity monitoring device according to claim 7, characterized in that: The temperature and humidity sensing unit also includes a battery power monitoring circuit, which is electrically connected to the battery power conversion circuit and the second main control circuit respectively.

10. The temperature and humidity monitoring device according to claim 9, characterized in that: The battery power monitoring circuit includes a resistor R37, a resistor R38 and a capacitor C150, one end of the resistor R37 is electrically connected to the battery power conversion circuit, the other end of the resistor R37 is electrically connected to one end of the resistor R38, one end of the capacitor C150 and the second main control circuit respectively, the other end of the resistor R38 is electrically connected to the other end of the capacitor C150, and the other end of the resistor R38 and the other end of the capacitor C150 are both grounded.

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