Temperature and humidity sensor circuit

Abstract

The utility model discloses a temperature and humidity sensor circuit, which comprises a main control circuit, a temperature and humidity sensing circuit, a communication circuit and a voltage stabilizing circuit, the main control circuit is connected with the temperature and humidity sensing circuit, the communication circuit and the voltage stabilizing circuit; the main control circuit is used for acquiring temperature and humidity signal data acquired by the temperature and humidity sensing circuit and sending out the temperature and humidity signal data through the communication circuit; the voltage stabilizing circuit is used for supplying power. According to the utility model, temperature and humidity detection can be carried out, and detection results can be transmitted out, so that when the temperature and humidity exceed threshold values, the power failure of equipment can be timely controlled and the equipment can be protected based on the transmitted results.

Description

Technical Field

[0001] This utility model relates to the field of temperature and humidity sensor technology, and in particular to a temperature and humidity sensor circuit. Background Technology

[0002] With the development of technology, various new types of equipment have been designed, manufactured, and put into use. However, during use, if there are unsuitable temperature or humidity conditions, it is necessary to disconnect the power supply to the equipment in a timely manner to protect it. Summary of the Invention

[0003] According to an embodiment of the present invention, a temperature and humidity sensor circuit is provided, comprising: a main control circuit, a temperature and humidity sensing circuit, a communication circuit, and a voltage regulator circuit.

[0004] The main control circuit is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit.

[0005] The main control circuit is used to acquire temperature and humidity signal data collected by the temperature and humidity sensing circuit, and to send the temperature and humidity signal data out through the communication circuit.

[0006] The voltage regulator circuit is used for power supply.

[0007] Furthermore, the main control circuit includes a main control chip, which is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit, and is used to acquire the temperature and humidity signal data collected by the temperature and humidity sensing circuit.

[0008] Furthermore, the main control circuit also includes: a first resistor and an indicator light;

[0009] One end of the first resistor is connected to pin 15 of the main control chip;

[0010] One end of the indicator light is connected to the first resistor, and the other end is grounded.

[0011] Furthermore, the temperature and humidity sensing circuit includes: a temperature and humidity sensor chip, pins 3 and 4 of which are connected to the main control circuit, pin 2 of which is connected to a 3.3V voltage and pin 5 is grounded, and the temperature and humidity sensor chip is used to collect temperature and humidity signal data.

[0012] Furthermore, the communication circuit includes: a 485 chip, a second resistor, a transistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a sixth resistor, a seventh resistor, and a diode;

[0013] Pins 2 and 3 of the 485 chip are connected;

[0014] One end of the second resistor is connected to the main control circuit;

[0015] The base of the transistor is connected to the other end of the second resistor, the emitter of the transistor is grounded, and the collector of the transistor is connected to one end of the third resistor and pin 2 of the 485 chip.

[0016] One end of the fourth resistor and the other end of the third resistor are connected to a 3.3V voltage, and the other end of the fourth resistor is connected to pin 1 of the 485 chip.

[0017] One end of the fifth resistor is connected to pin 8 of the 485 chip, one end of the first capacitor, and a 3.3V voltage; the other end of the fifth resistor is connected to pin 6 of the 485 chip.

[0018] The other end of the first capacitor is grounded.

[0019] One end of the sixth resistor is connected to pin 7 of the 485 chip, and the other end of the sixth resistor is connected to pin 5 of the 485 chip and then grounded.

[0020] One end of the seventh resistor is connected to pin 7 of the 485 chip and the first end of the diode, and the other end of the seventh resistor is connected to pin 6 of the 485 chip and the second end of the diode.

[0021] The third terminal of the diode is grounded.

[0022] Furthermore, the voltage regulator circuit includes: a voltage regulator chip, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor;

[0023] Pin 3 of the voltage regulator chip is connected to the 5V voltage, and pin 2 is connected to the main control circuit.

[0024] One end of the second capacitor is connected to pin 3 of the voltage regulator chip, and the other end is grounded;

[0025] One end of the third capacitor is connected to pin 3 of the voltage regulator chip, and the other end is grounded;

[0026] One end of the fourth capacitor is connected to pin 2 of the voltage regulator chip, and the other end is grounded;

[0027] One end of the fifth capacitor is connected to pin 2 of the voltage regulator chip, and the other end is grounded.

[0028] According to an embodiment of the present invention, a temperature and humidity sensor circuit can detect temperature and humidity and transmit the detection results. When the temperature and humidity exceed the threshold, the circuit can control the power supply of the device in a timely manner based on the transmitted results to protect the device.

[0029] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0030] Figure 1This is a circuit diagram of a temperature and humidity sensor circuit according to an embodiment of the present invention.

[0031] Figure 2 This is a circuit diagram of the main control circuit of a temperature and humidity sensor circuit according to an embodiment of the present invention.

[0032] Figure 3 This is a circuit diagram of a temperature and humidity sensing circuit according to an embodiment of the present invention.

[0033] Figure 4 This is a circuit diagram of a communication circuit for a temperature and humidity sensor circuit according to an embodiment of the present invention.

[0034] Figure 5 This is a circuit diagram of a voltage regulator circuit for a temperature and humidity sensor according to an embodiment of the present invention. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0036] First, combine Figures 1-5 This invention describes a temperature and humidity sensor circuit according to an embodiment of the present invention, used to detect the temperature and humidity of the device under test, and has a wide range of applications.

[0037] like Figures 1-5 As shown, a temperature and humidity sensor circuit according to an embodiment of the present invention includes a main control circuit, a temperature and humidity sensing circuit, a communication circuit, and a voltage regulator circuit.

[0038] Specifically, such as Figures 1-5 As shown, the main control circuit is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit. The main control circuit is used to acquire the temperature and humidity signal data collected by the temperature and humidity sensing circuit and send the temperature and humidity signal data out through the communication circuit. The voltage regulator circuit is used to convert the 5V power supply to 3.3V power supply.

[0039] Furthermore, the main control circuit includes a main control chip U2, which is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit. It is used to acquire temperature and humidity signal data collected by the temperature and humidity sensing circuit. The main control chip U2 is a CS32L010.

[0040] Furthermore, the main control circuit also includes: a first resistor R3 and an indicator LED1; one end of the first resistor R3 is connected to pin 15 of the main control chip U2; one end of the indicator LED1 is connected to the first resistor R3, and the other end is grounded. The indicator LED1 can be used to display the working status.

[0041] Furthermore, the temperature and humidity sensing circuit includes: a temperature and humidity sensor chip U1, pins 3 and 4 of which are connected to the main control circuit, pin 2 of which is connected to a 3.3V voltage, and pin 5 which is grounded. The temperature and humidity sensor chip U1 is used to collect temperature and humidity signal data. The temperature and humidity sensor chip U1 adopts a DHT30.

[0042] Furthermore, the communication circuit includes: a 485 chip U5, a second resistor R7, a transistor Q2, a third resistor R5, a fourth resistor R4, a fifth resistor R6, a first capacitor C12, a sixth resistor R9, a seventh resistor R8, and a diode D1; pins 2 and 3 of the 485 chip U5 are connected; one end of the second resistor R7 is connected to the main control circuit; the base of the transistor Q2 is connected to the other end of the second resistor R7, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected to one end of the third resistor R5 and pin 2 of the 485 chip U5; one end of the fourth resistor R4 and the other end of the third resistor are connected to a 3.3V voltage, and the other end of the fourth resistor R4 is connected to the 485 chip U5. Pin 1 of chip U5 is connected; one end of the fifth resistor R6 is connected to pin 8 of chip U5, one end of the first capacitor C12, and 3.3V voltage, and the other end of the fifth resistor R6 is connected to pin 6 of chip U5; the other end of the first capacitor C12 is grounded; one end of the sixth resistor R9 is connected to pin 7 of chip U5, and the other end of the sixth resistor R9 is connected to pin 5 of chip U5 and then grounded; one end of the seventh resistor R8 is connected to pin 7 of chip U5 and the first end of diode D1, and the other end of the seventh resistor R8 is connected to pin 6 of chip U5 and the second end of diode D1; the third end of diode D1 is grounded.

[0043] Furthermore, the voltage regulator circuit includes: a voltage regulator chip U3, a second capacitor C10, a third capacitor C9, a fourth capacitor C7, and a fifth capacitor C8; pin 3 of the voltage regulator chip U3 is connected to the 5V voltage, and pin 2 is connected to the main control circuit; one end of the second capacitor C10 is connected to pin 3 of the voltage regulator chip U3, and the other end is grounded; one end of the third capacitor C9 is connected to pin 3 of the voltage regulator chip U3, and the other end is grounded; one end of the fourth capacitor C7 is connected to pin 2 of the voltage regulator chip U3, and the other end is grounded; one end of the fifth capacitor C8 is connected to pin 2 of the voltage regulator chip U3, and the other end is grounded.

[0044] During use, the temperature and humidity sensing circuit collects temperature and humidity signal data of the device under test. The main control circuit obtains the temperature and humidity signal data from the temperature and humidity sensing circuit and sends the temperature and humidity signal data out through the communication circuit. When the temperature and humidity signal data exceeds the threshold, the power supply of the device under test is cut off to protect the device.

[0045] Above, refer to Figures 1-5This invention describes a temperature and humidity sensor circuit according to an embodiment of the present invention, which can detect temperature and humidity and transmit the detection results. When the temperature and humidity exceed the threshold, the circuit can control the device to cut off power in a timely manner based on the transmitted results to protect the device.

[0046] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A temperature and humidity sensor circuit, characterized in that, Includes: main control circuit, temperature and humidity sensing circuit, communication circuit and voltage regulation circuit; The main control circuit is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit. The main control circuit is used to acquire the temperature and humidity signal data collected by the temperature and humidity sensing circuit, and to send the temperature and humidity signal data out through the communication circuit. The voltage regulator circuit is used for power supply.

2. The temperature and humidity sensor circuit as described in claim 1, characterized in that, The main control circuit includes a main control chip, which is connected to the temperature and humidity sensing circuit, the communication circuit, and the voltage regulator circuit, and is used to acquire temperature and humidity signal data collected by the temperature and humidity sensing circuit.

3. The temperature and humidity sensor circuit as described in claim 2, characterized in that, The main control circuit also includes: a first resistor and an indicator light; One end of the first resistor is connected to pin 15 of the main control chip; One end of the indicator light is connected to the first resistor, and the other end is grounded.

4. The temperature and humidity sensor circuit as described in claim 1, characterized in that, The temperature and humidity sensing circuit includes a temperature and humidity sensor chip. Pins 3 and 4 of the temperature and humidity sensor chip are connected to the main control circuit. Pin 2 of the temperature and humidity sensor chip is connected to a 3.3V voltage and pin 5 is grounded. The temperature and humidity sensor chip is used to collect temperature and humidity signal data.

5. The temperature and humidity sensor circuit as described in claim 1, characterized in that, The communication circuit includes: a 485 chip, a second resistor, a transistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a sixth resistor, a seventh resistor, and a diode; Pins 2 and 3 of the 485 chip are connected; One end of the second resistor is connected to the main control circuit; The base of the transistor is connected to the other end of the second resistor, the emitter of the transistor is grounded, and the collector of the transistor is connected to one end of the third resistor and pin 2 of the 485 chip. One end of the fourth resistor and the other end of the third resistor are connected to a 3.3V voltage, and the other end of the fourth resistor is connected to pin 1 of the 485 chip; One end of the fifth resistor is connected to pin 8 of the 485 chip, one end of the first capacitor, and a 3.3V voltage, and the other end of the fifth resistor is connected to pin 6 of the 485 chip. The other end of the first capacitor is grounded; One end of the sixth resistor is connected to pin 7 of the 485 chip, and the other end of the sixth resistor is connected to pin 5 of the 485 chip and then grounded. One end of the seventh resistor is connected to pin 7 of the 485 chip and the first end of the diode, and the other end of the seventh resistor is connected to pin 6 of the 485 chip and the second end of the diode. The third terminal of the diode is grounded.

6. The temperature and humidity sensor circuit as described in claim 1, characterized in that, The voltage regulator circuit includes: a voltage regulator chip, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor; Pin 3 of the voltage regulator chip is connected to a 5V voltage, and pin 2 is connected to the main control circuit. One end of the second capacitor is connected to pin 3 of the voltage regulator chip, and the other end is grounded; One end of the third capacitor is connected to pin 3 of the voltage regulator chip, and the other end is grounded; One end of the fourth capacitor is connected to pin 2 of the voltage regulator chip, and the other end is grounded; One end of the fifth capacitor is connected to pin 2 of the voltage regulator chip, and the other end is grounded.

Images