A wind vane with online calibration function

Abstract

The present invention discloses a wind vane with an online calibration function, comprising a housing and a circuit board installed in the housing, a rotatable direction indicator installed on the top of the housing, the direction indicator connected to a wind direction measuring rod, a microprocessor for calibrating wind direction information integrated on the circuit board, a wind direction sensor for detecting current wind direction information that is communicatively connected to the microprocessor, a 485 communication module for transmitting the calibrated wind direction information to the outside, and a FALSH memory for storing wind direction information for wind direction calibration. The wind vane of the present invention adopts a mechanical structure, has a simple and light structure, high precision, and can accurately reflect wind direction information.

Description

Technical Field

[0001] The invention relates to the technical field of wind vanes, in particular to a wind vane with an online calibration function. Background Art

[0002] An ordinary wind vane is generally composed of a shell, a circuit board, and a direction vane. When the direction vane rotates under the action of wind, it cooperates with the wind direction sensing sensor on the circuit board to form an electrical signal, which is obtained by the wind direction sensing sensor on the circuit board and then calculated by the processor to obtain wind direction data and detect wind direction. However, the existing wind vane is not convenient to use, and therefore needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a wind vane with an online calibration function in view of the technical defects existing in the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is:

[0005] A wind vane with an online calibration function comprises a shell and a circuit board installed in the shell, a rotatable direction indicator installed on the top of the shell, the direction indicator is connected to a wind direction measuring rod, a microprocessor for calibrating wind direction information is integrated on the circuit board, a wind direction sensor for detecting current wind direction information and communicatively connected to the microprocessor, a 485 communication module for transmitting the calibrated wind direction information to the outside, and a FALSH memory for storing wind direction information for wind direction calibration.

[0006] Preferably, the wind direction sensor adopts a three-axis Hall sensor.

[0007] Preferably, the shell comprises an upper shell and a lower shell, the upper shell is connected to the lower shell by screws arranged at circumferential intervals, and a hollow sleeve portion for rotationally cooperating with a vertical sleeve of the direction indicator is formed at the upper end of the upper shell.

[0008] Preferably, a cavity structure is formed inside the vertical sleeve of the direction indicator, a wind direction measuring rod is inserted into the cavity structure, a magnet that cooperates with the wind direction sensor is installed at the bottom of the wind direction measuring rod, and the wind direction measuring rod passes into the interior of the shell from the inside of the socket part.

[0009] Preferably, the circuit board is manufactured into a circular disc-shaped structure, and is pressed against the upper inner portion of the lower shell by a pressing column at the bottom of the upper shell.

[0010] Preferably, a plurality of fixing screw holes arranged at intervals are formed on the outer side of the bottom of the lower shell.

[0011] The wind vane of the present invention adopts a mechanical structure, has a simple and light structure, high precision, and can accurately reflect wind direction information. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the wind vane with online calibration function of the present invention;

[0013] Figure 2 It is an axonometric view of the lower housing of the wind vane with online calibration function of the present invention;

[0014] Figure 3 It is an axonometric view of the upper housing of the wind vane with online calibration function of the present invention;

[0015] Figure 4 An axonometric diagram of a wind vane with an online calibration function without a direction indicator of the present invention;

[0016] Figure 5 It is a schematic diagram of the coordinated installation of the direction indicator and the circuit board of the wind vane with online calibration function of the present invention;

[0017] Figure 6 An axonometric diagram of a direction indicator of a wind vane with an online calibration function according to the present invention;

[0018] Figure 7 The circuit schematic diagram of the wind vane with online calibration function of the present invention;

[0019] Figure 8 The calibration flow chart of the wind vane with online calibration function;

[0020] Fig. 9 A circuit diagram of a microprocessor;

[0021] Figure 10-11 They are the circuit diagrams of the transceiver of the 485 communication module and the transient suppression diode unit;

[0022] Fig.12 This is the circuit diagram of the wind direction sensor. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] As shown in the figure, a wind vane with an online calibration function of the present invention comprises a shell 1 and a circuit board 4 installed in the shell, a rotatable direction indicator 2 installed on the top of the shell, the direction indicator is connected to a wind direction measuring rod 3, a microprocessor (STM32F030F4P6) for calibrating wind direction information is integrated on the circuit board 4, a wind direction sensor (MLX90363) for detecting current wind direction information and communicatively connected to the microprocessor (STM32F030F4P6), a 485 communication module (SP3485EN-L / TR, 3.3V low-power half-duplex RS-485 transceiver) for transmitting the calibrated wind direction information to the outside, and a FALSH memory for storing wind direction information for wind direction calibration.

[0025] In the above technical solution, since a FALSH memory is provided to store wind direction information for wind direction calibration, when the wind vane is calibrated, it can be realized in two ways: one is program calibration: that is, calibration is performed once the program is burned. The other is command calibration: corresponding commands are sent for calibration, mainly to adapt to different installation occasions and perform calibration at any time.

[0026] The calibration principle is to write the offset angle into the flash memory, read it each time when calculating the wind direction angle, subtract the corresponding wind direction angle for relevant processing.

[0027] If north calibration is required, align the direction indicator with the desired north direction and send instructions to the microprocessor to control the writing of the current wind direction angle into the flash memory. When the wind direction angle is needed, the microprocessor will subtract the previous wind direction angle from the current wind direction angle to obtain the calibrated wind direction angle; if the subtracted result is less than zero, add 360.

[0028] Preferably, the wind direction sensor adopts a three-axis Hall sensor.

[0029] Specifically, the housing includes an upper housing 11 and a lower housing 12, the upper housing and the lower housing are connected by screws arranged at intervals in the circumferential direction, and the upper end of the upper housing is formed with a hollow sleeve portion 18 for rotationally cooperating with the vertical sleeve 7 of the direction indicator. Specifically, the outer side of the upper housing is formed with a plurality of first screw holes 13, and the outer side of the lower housing is formed with a plurality of corresponding connecting columns 14, and the upper ends of the connecting columns are formed with corresponding screw holes, so as to facilitate the fixing of the upper housing and the lower housing together with screws.

[0030] Preferably, the interior of the vertical sleeve 7 of the direction indicator forms a cavity structure, such as Figure 6As shown, an interference-fit socket is formed in the center of the cavity structure to facilitate the insertion of a wind direction measuring rod. A magnet 5 that cooperates with the wind direction sensor is installed at the bottom of the wind direction measuring rod. The wind direction measuring rod 3 passes through the interior of the shell 1 from the interior of the socket 18.

[0031] Preferably, the circuit board 4 is manufactured into a circular disc-shaped structure, and is pressed against the upper inner portion of the lower shell 12 by a plurality of pressing columns 17 at the bottom of the upper shell.

[0032] Preferably, a plurality of fixing screw holes 16 arranged at intervals are formed on the outer side of the bottom of the lower shell, forming the bottom of the recessed portion 15 on the outer surface of the lower shell, such as Figure 1 shown.

[0033] The direction indicator 2 comprises a horizontal rod 8 cross-connected with a vertical sleeve 7, one end of the horizontal rod is connected to a counterweight block 6, and the other end is a guide plate of the direction indicator.

[0034] Furthermore, the present invention also includes a DC power supply module (not shown) to provide working power for the wind vane, such as powering a microprocessor and a wind direction sensor, a 485 communication module, a FLASH memory and other devices.

[0035] Wherein, the 485 communication module also includes U6 (PSM712, transient suppression diode unit), such as Figure 10-11 As shown, the A and B ends are connected to SP3485EN-L / TR, i.e., a 3.3V low-power half-duplex RS-485 transceiver, and its 485-B and 485-A pins are connected to the wiring terminal P to transmit data.

[0036] The wind vane of the present invention adopts the MLX90363 wind direction sensor. When wind blows, the end of the direction indicator that produces greater resistance to air flow will rotate along with the wind. In this way, the MLX90363 wind direction sensor will send the rotation angle to the microprocessor. After the microprocessor performs calibration calculations, the accurate wind direction information is transmitted through 485.

[0037] The wind vane of the present invention adopts a mechanical structure, has a simple and light structure, high precision, and can accurately reflect wind direction information.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for calibrating the wind direction of a wind vane with an online calibration function, the wind vane comprising a housing and a circuit board installed in the housing, a rotatable direction indicator installed on the top of the housing, the direction indicator being connected to a wind direction measuring rod, characterized in that: The circuit board is integrated with a microprocessor for calibrating wind direction information, a wind direction sensor for detecting current wind direction information, a 485 communication module for transmitting calibrated wind direction information, and a flash memory for storing wind direction information for wind direction calibration. The wind direction sensor adopts a three-axis Hall sensor. When performing the calibration of the wind vane, it is achieved in the following ways: one is program calibration: that is, calibration is performed once the program is burned; the other is command calibration: corresponding commands are sent for calibration, so as to adapt to different installation occasions and calibrate at any time; The calibration principle is to write the offset angle read into the flash memory, read it each time when calculating the wind direction angle, subtract the corresponding wind direction angle for relevant processing; If north calibration is required, align the direction indicator with the desired north direction and send instructions to the microprocessor to control the writing of the current wind direction angle into the flash memory. When the wind direction angle is needed, the microprocessor subtracts the previous wind direction angle from the current wind direction angle to obtain the calibrated wind direction angle; if the subtracted result is less than zero, add 360.

2. The wind direction calibration method of the anemometer with online calibration function according to claim 1, characterized in that: The shell comprises an upper shell and a lower shell, wherein the upper shell is connected to the lower shell by screws arranged at circumferential intervals, and a hollow sleeve portion for rotationally cooperating with a vertical sleeve of the direction indicator is formed at the upper end of the upper shell.

3. The wind direction calibration method of the anemometer with online calibration function according to claim 2, characterized in that: A cavity structure is formed inside the vertical sleeve of the direction indicator, a wind direction measuring rod is inserted into the cavity structure, a magnet that cooperates with the wind direction sensor is installed at the bottom of the wind direction measuring rod, and the wind direction measuring rod passes into the interior of the shell from the inside of the sleeve part.

4. The wind direction calibration method of the anemometer with online calibration function according to claim 2, characterized in that: The circuit board is manufactured into a circular disc-shaped structure and is pressed against the upper inner portion of the lower shell by a pressing column at the bottom of the upper shell.

5. The wind direction calibration method of the anemometer with online calibration function according to claim 2, characterized in that: A plurality of fixing screw holes arranged at intervals are formed on the outer side of the bottom of the lower shell.

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