Multifunctional filtering equipment for intelligent sensor

Abstract

The utility model discloses multifunctional filtering equipment with an intelligent sensor. The sensor is electrically connected with a microprocessor through a filtering circuit; the filter circuit is used for filtering interference between the sensor and the microprocessor, so that interference of a hardware structure of the intelligent sensor formed by connecting the sensor and the microprocessor can be effectively filtered, and finally, the anti-interference capability of the hardware structure of the intelligent sensor formed by connecting the sensor and the microprocessor is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to an intelligent sensor multifunctional filtering device. Background Art

[0002] An intelligent sensor is a sensor with information processing capabilities. Equipped with a microprocessor, it can collect, process, and exchange information. It is the product of sensor integration combined with a microprocessor. Compared with conventional sensors, intelligent sensors have the following three advantages: they can achieve high-precision information collection at a low cost through software technology; they have a certain degree of programming automation capabilities; and they offer diverse functions.

[0003] For example, the smart temperature and humidity sensor with the patent number "CN202310055848.3" and the patent name "Smart temperature and humidity sensor system and implementation method based on TLSR8251" is a type of smart sensor. However, the hardware structure of the smart sensor formed by connecting the actual sensor and the microprocessor has poor anti-interference ability. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a multifunctional filtering device for an intelligent sensor, which is electrically connected to a microprocessor via a filtering circuit via a sensor; the filtering circuit is used to filter the interference between the sensor and the microprocessor, and can effectively filter the interference of the hardware structure of the intelligent sensor formed by the connection between the sensor and the microprocessor, and ultimately make the hardware structure of the intelligent sensor formed by the connection between the sensor and the microprocessor have better anti-interference ability.

[0005] In order to overcome the shortcomings of the existing technology, the utility model provides a solution for an intelligent sensor multifunctional filtering device, which is as follows:

[0006] An intelligent sensor multifunctional filtering device, comprising:

[0007] The sensor is electrically connected to the microprocessor through a filtering circuit;

[0008] The filtering circuit is used to filter the interference between the sensor and the microprocessor.

[0009] Furthermore, sensor A is a DHT11 temperature and humidity sensor.

[0010] Furthermore, the microprocessor is a STM32F103C8T6 development board.

[0011] Furthermore, pin 4 of the DHT11 temperature and humidity sensor is electrically connected to one end of resistor R1 of the filter circuit, the other end of resistor R1 of the filter circuit and one end of resistor R2 are electrically connected to the negative input terminal of TL084 operational amplifier U1, the other end of resistor R2 of the filter circuit and one end of resistor R3 are electrically connected to the output terminal of TL084 operational amplifier U1, and one end of resistor R4 is electrically connected to the positive input terminal of TL084 operational amplifier U1.

[0012] Furthermore, pin 3 of the DHT11 temperature and humidity sensor is electrically connected to the output end of the TL084 operational amplifier U2 of the filtering circuit, the positive input end of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R5 of the filtering circuit, and the negative input end of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R6 of the filtering circuit.

[0013] Furthermore, pin 3 of the DHT11 temperature and humidity sensor is electrically connected to one electrode of capacitor C1 of the filter circuit, the other electrode of capacitor C1 of the filter circuit, the other end of resistor R6 and one end of resistor R7 are electrically connected, and the other end of resistor R7 is electrically connected to pin 2 of the DHT11 temperature and humidity sensor.

[0014] Furthermore, the other end of resistor six R6 of the filtering circuit, the other end of resistor four R4, one end of resistor eight R8, and the positive input end of TL084 operational amplifier three U3 are electrically connected to the output end of TL084 operational amplifier three U3, the other end of resistor eight R8, one electrode of capacitor two C2, and one end of resistor nine R9 are electrically connected, and the other electrode of capacitor two C2, the other end of resistor three R3, and one end of resistor ten R10 are electrically connected.

[0015] Furthermore, the negative input terminal of the TL084 operational amplifier U3 of the filtering circuit and one end of the resistor R11 are electrically connected to the negative electrode of the Zener diode D1, the other end of the resistor R11 is electrically connected to the 5V voltage source +5V, the positive electrode of the Zener diode D1 is grounded, the model of the Zener diode D1 is 7812, and pin 1 of the DHT11 temperature and humidity sensor is grounded.

[0016] Furthermore, a 5V voltage source +5V and one end of resistor R12 are electrically connected to the G pole of the MOS tube, the S pole of the MOS tube is electrically connected to the 3 pin of the DHT11 temperature and humidity sensor, and the D pole of the MOS tube is electrically connected to the 4 pin of the DHT11 temperature and humidity sensor.

[0017] Furthermore, the other end of the resistor R10 of the filtering circuit, the negative input terminal of the TL084 operational amplifier U4, and one end of the resistor R13 are electrically connected to one pole of the capacitor C3, the other end of the resistor R9 is electrically connected to the positive input terminal of the TL084 operational amplifier U4, and pin 11 of the STM32F103C8T6 development board, the other end of the resistor R13, and the other pole of the capacitor C3 are electrically connected to the output terminal of the TL084 operational amplifier U4.

[0018] The beneficial functions of this utility model are:

[0019] The sensor is electrically connected to the microprocessor through a filtering circuit; the filtering circuit is used to filter interference between the sensor and the microprocessor, which can effectively filter interference in the hardware structure of the intelligent sensor formed by the sensor and the microprocessor, and ultimately make the hardware structure of the intelligent sensor formed by the sensor and the microprocessor more anti-interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the electrical connection between a sensor and a filtering circuit of an intelligent sensor multifunctional filtering device.

[0021] Figure 2 The utility model is a circuit diagram of an STM32F103C8T6 development board of an intelligent sensor multifunctional filtering device. DETAILED DESCRIPTION

[0022] The present invention will be described below in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 2 As shown, the utility model is an intelligent sensor multifunctional filtering device, which includes:

[0024] The sensor is electrically connected to the microprocessor through a filtering circuit;

[0025] The filtering circuit is used to filter the interference between the sensor and the microprocessor.

[0026] The sensor is electrically connected to the microprocessor through a filtering circuit; the filtering circuit is used to filter interference between the sensor and the microprocessor, which can effectively filter interference in the hardware structure of the intelligent sensor formed by the sensor and the microprocessor, and ultimately make the hardware structure of the intelligent sensor formed by the sensor and the microprocessor more anti-interference.

[0027] In a preferred but non-limiting embodiment of the present invention, the sensor A is a DHT11 temperature and humidity sensor.

[0028] The DHT11 temperature and humidity sensor is a calibrated digital output temperature and humidity sensor with an accuracy of ±5%RH and a temperature of ±2°C. It has a range of 5-95%RH and a temperature of -20-+60°C.

[0029] In a preferred but non-limiting embodiment of the present invention, the microprocessor is an STM32F103C8T6 development board.

[0030] The STM32F103C8T6 development board has the following main features: It can be configured in synchronous or asynchronous transmission mode. It supports multiple baud rate settings. It provides data receiving and sending functions.

[0031] In a preferred but non-limiting embodiment of the present invention, pin 4 of the DHT11 temperature and humidity sensor is electrically connected to one end of the resistor R1 of the filter circuit, the other end of the resistor R1 of the filter circuit and one end of the resistor R2 are electrically connected to the negative input terminal of the TL084 operational amplifier U1, the other end of the resistor R2 of the filter circuit and one end of the resistor R3 are electrically connected to the output terminal of the TL084 operational amplifier U1, and one end of the resistor R4 is electrically connected to the positive input terminal of the TL084 operational amplifier U1.

[0032] Pin 4 of the DHT11 temperature and humidity sensor is electrically connected to one end of resistor R1 of the filtering circuit, the other end of resistor R1 of the filtering circuit and one end of resistor R2 are electrically connected to the negative input terminal of TL084 operational amplifier U1, the other end of resistor R2 of the filtering circuit and one end of resistor R3 are electrically connected to the output terminal of TL084 operational amplifier U1, and one end of resistor R4 is electrically connected to the positive input terminal of TL084 operational amplifier U1. In this way, the interference between the DHT11 temperature and humidity sensor and the TL084 operational amplifier U1 can be effectively filtered out.

[0033] In a preferred but non-limiting embodiment of the present invention, pin 3 of the DHT11 temperature and humidity sensor is electrically connected to the output end of the TL084 operational amplifier U2 of the filtering circuit, the positive input end of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R5 of the filtering circuit, and the negative input end of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R6 of the filtering circuit.

[0034] Pin 3 of the DHT11 temperature and humidity sensor is electrically connected to the output of the TL084 operational amplifier U2 in the filtering circuit. The positive input of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R5 in the filtering circuit. The negative input of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R6 in the filtering circuit. This effectively filters out interference between the DHT11 temperature and humidity sensor and the TL084 operational amplifier.

[0035] In a preferred but non-limiting embodiment of the present invention, pin 3 of the DHT11 temperature and humidity sensor is electrically connected to one electrode of capacitor C1 of the filter circuit, the other electrode of capacitor C1 of the filter circuit and the other end of resistor R6 are electrically connected to one end of resistor R7, and the other end of resistor R7 is electrically connected to pin 2 of the DHT11 temperature and humidity sensor.

[0036] Pin 3 of the DHT11 temperature and humidity sensor is electrically connected to one electrode of the capacitor C1 of the filter circuit, the other electrode of the capacitor C1 of the filter circuit, the other end of the resistor R6 and one end of the resistor R7 are electrically connected, and the other end of the resistor R7 is electrically connected to pin 2 of the DHT11 temperature and humidity sensor. The capacitor C1 and the resistor R6 of the filter circuit form a filter circuit, which can achieve a better filtering effect on the circuit in which they are located.

[0037] In a preferred but non-limiting embodiment of the present invention, the other end of resistor six R6 of the filtering circuit, the other end of resistor four R4, one end of resistor eight R8, and the positive input end of TL084 operational amplifier three U3 are electrically connected to the output end of TL084 operational amplifier three U3, the other end of resistor eight R8, one electrode of capacitor two C2, and one end of resistor nine R9 are electrically connected, and the other electrode of capacitor two C2, the other end of resistor three R3, and one end of resistor ten R10 are electrically connected.

[0038] By electrically connecting the other end of resistor R6, the other end of resistor R4, one end of resistor R8, and the positive input end of TL084 operational amplifier U3 to the output end of TL084 operational amplifier U3, the other end of resistor R8, one electrode of capacitor C2, and one end of resistor R9 to each other, and the other electrode of capacitor C2, the other end of resistor R3, and one end of resistor R10 to each other, resistor R8 and capacitor C2 form a filtering circuit, which can achieve a better filtering effect on the circuit in which they are located.

[0039] In a preferred but non-limiting embodiment of the present invention, the negative input terminal of the TL084 operational amplifier U3 of the filtering circuit and one end of the resistor R11 are electrically connected to the negative electrode of the Zener diode D1, the other end of the resistor R11 is electrically connected to the 5 volt voltage source +5V, the positive electrode of the Zener diode D1 is grounded, the model of the Zener diode D1 is 7812, and pin 1 of the DHT11 temperature and humidity sensor is grounded.

[0040] The negative input terminal of the TL084 operational amplifier U3 in the filtering circuit, one end of the resistor R11, is electrically connected to the cathode of the Zener diode D1, the other end of the resistor R11 is electrically connected to the 5V voltage source +5V, and the anode of the Zener diode D1 is grounded. This effectively filters out the interference between the DHT11 temperature and humidity sensor and the TL084 operational amplifier.

[0041] In a preferred but non-limiting embodiment of the present invention, a 5-volt voltage source +5V and one end of the resistor R12 are electrically connected to the G pole of the MOS tube, the S pole of the MOS tube is electrically connected to the 3 pin of the DHT11 temperature and humidity sensor, and the D pole of the MOS tube is electrically connected to the 4 pin of the DHT11 temperature and humidity sensor.

[0042] By connecting a 5V voltage source +5V and one end of the resistor R12 to the G pole of the MOS tube, the S pole of the MOS tube to the 3-pin of the DHT11 temperature and humidity sensor, and the D pole of the MOS tube to the 4-pin of the DHT11 temperature and humidity sensor, the DHT11 temperature and humidity sensor can be stably powered.

[0043] In a preferred but non-limiting embodiment of the present invention, the other end of the resistor R10 of the filtering circuit, the negative input terminal of the TL084 operational amplifier U4, and one end of the resistor R13 are electrically connected to one pole of the capacitor C3, the other end of the resistor R9 is electrically connected to the positive input terminal of the TL084 operational amplifier U4, and pin 11 of the STM32F103C8T6 development board, the other end of the resistor R13, and the other pole of the capacitor C3 are electrically connected to the output terminal of the TL084 operational amplifier U4.

[0044] The other end of the resistor R10 in the filtering circuit, the negative input terminal of the TL084 operational amplifier U4, one end of the resistor R13 and one pole of the capacitor C3 are electrically connected, the other end of the resistor R9 and the positive input terminal of the TL084 operational amplifier U4 are electrically connected, and pin 11 of the STM32F103C8T6 development board, the other end of the resistor R13 and the other pole of the capacitor C3 are electrically connected to the output terminal of the TL084 operational amplifier U4. In this way, the interference between the DHT11 temperature and humidity sensor, the STM32F103C8T6 development board and the TL084 operational amplifier U4 can be effectively filtered out.

[0045] The beneficial functions of this utility model are:

[0046] The sensor is electrically connected to the microprocessor through a filtering circuit; the filtering circuit is used to filter interference between the sensor and the microprocessor, which can effectively filter interference in the hardware structure of the intelligent sensor formed by the sensor and the microprocessor, and ultimately make the hardware structure of the intelligent sensor formed by the sensor and the microprocessor more anti-interference.

[0047] The present invention has been described above in an illustrative manner using embodiments. Those skilled in the art should understand that the present disclosure is not limited to the embodiments described above, and that various changes, modifications, and substitutions may be made without departing from the scope of the present invention.

Claims

1. An intelligent sensor multifunctional filtering device, characterized in that: include: The sensor is electrically connected to the microprocessor through a filtering circuit; The filtering circuit is used to filter the interference between the sensor and the microprocessor; Pin 4 of the DHT11 temperature and humidity sensor is electrically connected to one end of resistor R1 in the filter circuit. The other end of resistor R1 and one end of resistor R2 in the filter circuit are electrically connected to the negative input terminal of TL084 operational amplifier U1. The other end of resistor R2 and one end of resistor R3 in the filter circuit are electrically connected to the output terminal of TL084 operational amplifier U1. One end of resistor R4 is electrically connected to the positive input terminal of TL084 operational amplifier U1. Pin 3 of the DHT11 temperature and humidity sensor is electrically connected to the output terminal of the TL084 operational amplifier U2 of the filter circuit, the positive input terminal of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R5 of the filter circuit, and the negative input terminal of the TL084 operational amplifier U2 is electrically connected to one end of the resistor R6 of the filter circuit; Pin 3 of the DHT11 temperature and humidity sensor is electrically connected to one electrode of capacitor C1 of the filter circuit, the other electrode of capacitor C1 of the filter circuit, the other end of resistor R6 and one end of resistor R7 are electrically connected, and the other end of resistor R7 is electrically connected to pin 2 of the DHT11 temperature and humidity sensor; The other end of resistor R6 of the filter circuit, the other end of resistor R4, one end of resistor R8, the positive input terminal of TL084 operational amplifier U3, and the output terminal of TL084 operational amplifier U3 are electrically connected; the other end of resistor R8, one electrode of capacitor C2, and one end of resistor R9 are electrically connected; the other electrode of capacitor C2, the other end of resistor R3, and one end of resistor R10 are electrically connected; The negative input terminal of the TL084 operational amplifier U3 of the filtering circuit and one end of the resistor R11 are electrically connected to the negative terminal of the voltage-stabilizing diode D1. The other end of the resistor R11 is electrically connected to a 5V voltage source +5V. The positive terminal of the voltage-stabilizing diode D1 is grounded. The model of the voltage-stabilizing diode D1 is 7812. Pin 1 of the DHT11 temperature and humidity sensor is grounded. A 5V voltage source +5V and one end of resistor R12 are electrically connected to the G pole of the MOS tube, the S pole of the MOS tube is electrically connected to pin 3 of the DHT11 temperature and humidity sensor, and the D pole of the MOS tube is electrically connected to pin 4 of the DHT11 temperature and humidity sensor; the other end of resistor R10 of the filtering circuit, the negative input end of TL084 operational amplifier U4, one end of resistor R13 are electrically connected to one pole of capacitor C3, the other end of resistor R9 is electrically connected to the positive input end of TL084 operational amplifier U4, and pin 11 of the STM32F103C8T6 development board, the other end of resistor R13, and the other pole of capacitor C3 are electrically connected to the output end of TL084 operational amplifier U4.

2. The intelligent sensor multifunctional filtering device according to claim 1, characterized in that: Sensor A is a DHT11 temperature and humidity sensor.

3. The intelligent sensor multifunctional filtering device according to claim 2, characterized in that: The microprocessor is the STM32F103C8T6 development board.

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