Air index detector based on unmanned aerial vehicle

Abstract

The utility model relates to the technical field of air index detection, in particular to an air index detector based on an unmanned aerial vehicle, which comprises an unmanned aerial vehicle, a main control chip, a flight control module, a communication module, a detection module and a compensation module, and the compensation module comprises a temperature measurement module, a digital-to-analog conversion module and a difference module. The digital-to-analog conversion module can quickly respond to a signal transmitted by the main control chip, and the differential module can integrate data transmitted by the detection module and the digital-to-analog conversion module, so that the compensation module can perform accurate deviation adjustment on the data acquired by the detection module. According to the air index detector, the technical problem of measurement data deviation caused by environment temperature change of an existing air index detector of the unmanned aerial vehicle is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air index detection, in particular to an air index detector based on an unmanned aerial vehicle. Background Art

[0002] Air index detection refers to the detection and analysis of various components and parameters in the air, which allows us to understand the air quality in a timely manner. Nowadays, air index detection generally uses ground equipment to collect data, or collectors use handheld air detectors to manually collect data in the air. However, for some difficult-to-reach places, such as mountains and polluted areas, traditional ground equipment is not convenient for collection, and manual collectors also find it difficult to directly enter these areas.

[0003] The patent name that has been published is "UAV-based air quality detection system", and the publication number is CN205809700U, a Chinese utility model patent. The patent includes a remote control receiving module, a flight end controller module, a motor, an air detection module, a temperature and humidity collection module, an atmospheric pressure collection module, and a wireless transmission module. Users can remotely control the drone to reach a designated location to collect data, and after the collection is completed, the data can be transmitted to the user control end. However, due to the influence of the air temperature environment, the drone air index detection system is prone to some deviations in the data collection process, resulting in inaccurate data. Utility Model Content

[0004] The purpose of the present application is to provide an air index detector based on an unmanned aerial vehicle, which solves the technical problem of measurement data deviation caused by changes in ambient temperature in existing air index detectors of unmanned aerial vehicles.

[0005] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0006] The utility model provides an air index detector based on an unmanned aerial vehicle, comprising an unmanned aerial vehicle, a main control chip placed inside the unmanned aerial vehicle, a flight control module connected to the main control chip and used to control the flight of the unmanned aerial vehicle, a communication module and a detection module connected to the main control chip; the utility model is characterized in that: it also includes a compensation module, the compensation module includes a temperature measurement module, a digital-to-analog conversion module, and a differential module for performing deviation adjustment on a data signal detected by the detection module;

[0007] The temperature measurement module includes a thermistor and an amplifier circuit. The thermistor converts the temperature signal into an electrical signal and transmits the electrical signal to the amplifier circuit connected thereto. The amplifier circuit processes the signal after receiving the signal and outputs the signal to the main control chip after the processing is completed.

[0008] The digital-to-analog conversion module includes a digital-to-analog converter. After receiving a signal from a main control chip connected thereto, the digital-to-analog converter processes the signal. After the processing is completed, the digital-to-analog conversion module outputs a compensation signal to a differential module connected thereto.

[0009] The differential module includes an operational amplifier, one input end of which is connected to the detection module, and the other input end of which is connected to the digital-to-analog conversion module. The operational amplifier performs deviation adjustment on the received data, and after processing, outputs a signal to the main control chip.

[0010] In some embodiments, the digital-to-analog conversion module includes a potentiometer, which is connected to the digital-to-analog converter and is used to adjust a reference voltage of the digital-to-analog converter.

[0011] In some embodiments, the amplification circuit includes an operational amplifier, which is connected to the thermistor. After receiving the electrical signal from the thermistor, the operational amplifier performs signal amplification processing and outputs the signal to the main control chip.

[0012] In some embodiments, the amplifying circuit further includes a filtering circuit connected to the output end of the operational amplifier.

[0013] In some embodiments, a power module is also included, and the power module is respectively connected to the main control chip, the flight control module, the communication module, the detection module, and the compensation module.

[0014] In some embodiments, the digital-to-analog converter is DAC8830IDR.

[0015] In some embodiments, the model of the main control chip is STC15F2K60S2.

[0016] The technical solution of the present application has at least the following advantages and beneficial effects:

[0017] A compensation module is added to the utility model. The compensation module can sense the change of ambient temperature in real time and adjust the data detected by the air index detector accordingly, thereby reducing the influence of temperature on the measurement data; the compensation module includes a digital-to-analog conversion module and a differential module. The digital-to-analog conversion module can quickly respond to the signal transmitted by the main control chip, and the differential module can integrate the data transmitted by the detection module and the digital-to-analog conversion module, so that the compensation module can accurately adjust the deviation of the data collected by the detection module; the digital-to-analog conversion module includes a potentiometer and a digital-to-analog converter. The potentiometer can adjust the reference voltage in the digital-to-analog converter. The collector can flexibly adjust the output range and accuracy of the digital-to-analog converter as needed, so that the compensation module has higher versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a signal flow chart of the air index detection process of the utility model;

[0019] Figure 2 This is the circuit diagram of the temperature measurement module of the utility model;

[0020] Figure 3 This is a circuit diagram of a digital-to-analog conversion module of the utility model;

[0021] Figure 4 This is a circuit diagram of a differential module of the present utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. If the terms "center", "upper", "lower", "inner", "outer", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the figure, or the orientation or position relationship in which the product of the application is usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. It should also be noted that unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, they should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Example 1

[0025] Please refer to Figure 1-Figure 4The utility model provides an air index detector based on an unmanned aerial vehicle, which is the same as the prior art, and includes a drone, a main control chip placed inside the drone, a flight control module, a communication module, and a detection module. The main control chip is connected to the flight control module, the communication module, and the detection module respectively. The flight control module is used to control the flight state of the drone; the detection module is used to detect the air index in the area where the drone is located, convert the substance to be tested into an electrical signal, and then output the signal to the main control chip; the communication module is used to transmit the data received by the main control chip from the detection module to the monitoring end;

[0026] The utility model also includes a power module, which is used to provide power and is respectively connected to the main control chip, the flight control module, the communication module, the detection module, and the compensation module.

[0027] Different from the prior art, it also includes a compensation module, which can realize dynamic compensation, that is, according to the temperature monitored in real time, the compensation module can accurately adjust the compensation voltage value; the compensation module includes a temperature measurement module, a digital-to-analog conversion module, and a differential module.

[0028] The temperature measurement module is connected to the main control chip and is used to detect the temperature in the air; the digital-to-analog conversion module is respectively connected to the main control chip and the differential module and is used to provide a compensation voltage. It processes the signal transmitted by the main control chip and outputs the signal to the differential module after the processing is completed; the input end of the differential module is respectively connected to the detection module and the digital-to-analog conversion module, and the output end is connected to the main control chip, and is used to adjust the deviation of the data signal detected by the detection module.

[0029] like Figure 1 As shown, the workflow of performing deviation adjustment on the data signal detected by the detection module in this embodiment is as follows:

[0030] The temperature measurement module converts the temperature signal into an analog signal. After completion, the temperature measurement module transmits the analog signal to the main control chip. The main control chip processes the analog signal. After the processing is completed, it outputs a digital signal to the digital-to-analog conversion module. The digital signal is a digital signal of the compensation voltage.

[0031] The digital-to-analog conversion module converts the received digital signal into an analog signal, and after completion, outputs the analog signal of the compensation voltage to the differential module;

[0032] The detection module converts the substance to be detected into an electrical signal and outputs it to the differential module. The differential module performs signal integration processing on the electrical signal transmitted by the detection module and the analog signal transmitted by the digital-to-analog conversion module.

[0033] After the differential module completes the processing, it outputs an analog signal to the main control chip. The analog signal is an accurate detection signal. After the main control chip receives the analog signal, it transmits the data to the monitoring end through the communication module.

[0034] In the present utility model, the model of the main control chip is STC15F2K60S2.

[0035] Furthermore, if Figure 2 As shown, the temperature measurement module includes an operational amplifier U3, a thermistor U1, capacitors C2 and C3, and resistors R1, R5, and R6; the functions of capacitors C2 and C3 are both filtering; the amplification circuit includes an operational amplifier U3, resistors R5 and R6, and a capacitor C3; the filtering circuit includes a capacitor C3;

[0036] Furthermore, in the temperature measurement module, one end of the resistor R1 is connected to the power supply, and the other end of the resistor R1, one end of the thermistor U1, one end of the capacitor C2, and pin 3 of the operational amplifier U3 are connected, and the other end of the thermistor U1 is connected to the other end of the capacitor C2 and grounded; pin 4 of the operational amplifier U3 is connected to the power supply and pin 5 is grounded, pin 2 of the operational amplifier U3 is connected to one end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R5, pin 1 of the operational amplifier U3, one end of the capacitor C3, and P1.0 of the main control chip are connected; the other end of the resistor R6 is connected to the other end of the capacitor C3.

[0037] Furthermore, if Figure 3 As shown, the digital-to-analog conversion module includes a digital-to-analog converter U2, a potentiometer PR1, and a capacitor C1; the capacitor C1 is used for filtering, and the potentiometer PR1 is used for adjusting the reference voltage of the digital-to-analog converter U2; the model of the digital-to-analog converter is DAC8830IDR;

[0038] Furthermore, in the digital-to-analog conversion module, one end of the potentiometer PR1 is connected to the power supply, the other end of the potentiometer PR1 is connected to the AGND end of the digital-to-analog converter U2 and is grounded, and the middle end of the potentiometer PR1 is connected to the VREF end of the digital-to-analog converter U2; the VDD end of the digital-to-analog converter U2 is connected to one end of the capacitor C1 and is connected to the power supply, and the other end of the capacitor C1 is connected to the DGND end of the digital-to-analog converter U2 and is grounded; the CS# end, SDI end, and SCLK end of the digital-to-analog converter U2 are respectively connected to the P1.7 end, P1.6 end, and P1.5 end of the main control chip; the VOUT end of the digital-to-analog converter U2 is set as the VOUT output end, which is connected to the differential module.

[0039] Furthermore, if Figure 4 As shown, the differential module includes an operational amplifier U4, a capacitor C4, and resistors R2, R3, R4, and R7; the capacitor C4 is used for filtering;

[0040] Furthermore, in the differential module, one end of the resistor R2 is set as the IN1 input terminal, which is used to be connected to the detection module; the other end of the resistor R2, one end of the resistor R7, and pin 3 of the operational amplifier U4 are connected; one end of the resistor R3 is set as the IN2 input terminal, which is used to be connected to the VOUT output terminal of the digital-to-analog converter U2 in the digital-to-analog conversion module, and the other end of the resistor R3, one end of the resistor R4, and pin 2 of the operational amplifier U4 are connected; pin 4 of the operational amplifier U4 is connected to the power supply; the other end of the resistor R7, pin 1 of the operational amplifier U4, one end of the capacitor C4, and the P1.1 terminal of the main control chip are connected; the other end of the resistor R4, pin 5 of the operational amplifier U4, and the other end of the capacitor C4 are connected and grounded.

[0041] It should be noted that the compensation module is for temperature compensation. The thermistor in the temperature measurement module is replaced with a hygroscopic resistor. The compensation module can be used for humidity compensation.

[0042] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present invention, and the scope of the present invention is defined by the attached claims.

Claims

1. An air index detector based on an unmanned aerial vehicle, comprising a drone, a main control chip placed inside the drone, a flight control module connected to the main control chip and used to control the flight of the drone, a communication module connected to the main control chip, and a detection module; characterized in that: It also includes a compensation module, which includes a temperature measurement module, a digital-to-analog conversion module, and a differential module for performing deviation adjustment on the data signal detected by the detection module; The temperature measurement module includes a thermistor and an amplifier circuit. The thermistor converts the temperature signal into an electrical signal and transmits the electrical signal to the amplifier circuit connected thereto. The amplifier circuit processes the signal after receiving the signal and outputs the signal to the main control chip after the processing is completed. The digital-to-analog conversion module includes a digital-to-analog converter. After receiving a signal from a main control chip connected thereto, the digital-to-analog converter processes the signal. After the processing is completed, the digital-to-analog conversion module outputs a compensation signal to a differential module connected thereto. The differential module includes an operational amplifier, one input end of which is connected to the detection module, and the other input end of which is connected to the digital-to-analog conversion module. The operational amplifier performs deviation adjustment on the received data, and after processing, outputs a signal to the main control chip.

2. The air index detector based on unmanned aerial vehicle according to claim 1 is characterized in that: The digital-to-analog conversion module comprises a potentiometer, which is connected to the digital-to-analog converter and is used to adjust the reference voltage of the digital-to-analog converter.

3. The air index detector based on unmanned aerial vehicle according to claim 1, characterized in that: The amplification circuit includes an operational amplifier, which is connected to the thermistor. After receiving the electrical signal from the thermistor, the operational amplifier performs signal amplification processing, and after completion, outputs the signal to the main control chip.

4. The air index detector based on unmanned aerial vehicle according to claim 3 is characterized in that: The amplifying circuit further includes a filtering circuit, and the filtering circuit is connected to the output end of the operational amplifier.

5. The air index detector based on unmanned aerial vehicle according to claim 1, characterized in that: It also includes a power module, which is respectively connected to the main control chip, the flight control module, the communication module, the detection module, and the compensation module.

6. The air index detector based on unmanned aerial vehicle according to claim 1, characterized in that: The model of the digital-to-analog converter is DAC8830IDR.

7. The air index detector based on unmanned aerial vehicle according to claim 1, characterized in that: The model of the main control chip is STC15F2K60S2.

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