Photoelectric sensor angle adjusting type fan speed measuring device

Abstract

The invention relates to a photoelectric sensor speed measuring device which is mainly applied to a fan rotating speed measuring system. The system is composed of an angle adjusting device, a photoelectric sensor and a digital-to-analog conversion device. In the prior art, a photoelectric sensor generally measures the rotating speed by irradiating a reflector, but a fan pipeline cannot be directly aligned with the photoelectric sensor and the reflector due to opaqueness. In order to solve the problem, the invention provides an improved photoelectric sensor speed measuring device which comprises an angle adjusting device with an adjustable angle, and the angle adjusting device can control the angle adjustment of a photoelectric sensor and ensure that the photoelectric sensor is always aligned with a reflector on a fan blade. According to the design, accurate sensor alignment can be realized in a non-transparent pipeline, so that the measurement accuracy of the rotating speed of the fan is ensured. Through the speed measuring device, the angle of the photoelectric sensor can be flexibly adjusted to adapt to different installation environments, and the technical problems that the pipeline is not transparent and the angle is not matched are solved.

Description

Technical Field

[0001] The invention relates to a photoelectric sensor and its application field, and in particular to a photoelectric sensor clamping device for measuring the rotational speed of a fan, in particular to a rotational speed measurement system used in a fan pipeline. Background Art

[0002] Photoelectric sensors are a common measurement tool for measuring fan speed. Traditional photoelectric sensors obtain speed information by emitting a light beam onto a reflective sheet and receiving the reflected light signal. However, fan ducts are usually opaque, which makes it impossible for photoelectric sensors to directly align with the reflective sheet on the fan blades for accurate measurement. This technical difficulty limits the application of traditional photoelectric sensors, especially when the installation location is limited, it is difficult to ensure accurate alignment between the photoelectric sensor and the reflective sheet.

[0003] At present, there are some designs of photoelectric sensor clamping devices to address this problem, but most of these designs fail to fully solve the problems of fan duct opacity and sensor angle adjustment flexibility. In order to better adapt to the installation conditions of different fan ducts and ensure the measurement accuracy of the photoelectric sensor, a new photoelectric sensor angle adjustment device is urgently needed to optimize the installation method and achieve accurate speed measurement. Invention patent content

[0004] The purpose of this patent is to provide a photoelectric sensor speed measuring device to solve the problem of difficulty in aligning the photoelectric sensor due to the opacity of the fan duct. The specific technical solution is as follows:

[0005] A photoelectric sensor speed measuring device comprises a photoelectric sensor, an angle adjustment device, and a reflective sheet. The photoelectric sensor measures the rotation speed by irradiating the reflective sheet on the fan blade, and the angle adjustment device controls the angle of the photoelectric sensor to ensure that the photoelectric sensor can be accurately aligned with the reflective sheet, thereby realizing accurate measurement of the fan rotation speed.

[0006] In the present invention, the output signal of the photoelectric sensor is converted into a 0-5V analog output through analog-to-digital conversion (AD conversion) for use in subsequent measurement and control systems. This design effectively solves the installation problem caused by the opacity of the fan duct and can flexibly adjust the angle of the photoelectric sensor to adapt to different measurement environments.

[0007] The technical solution of the present invention also includes controlling the angle through an angle adjustment device so that the photoelectric sensor can be accurately aligned under different installation conditions, which not only improves the accuracy of rotation speed measurement but also enhances the adaptability of the system.

[0008] Compared with the existing photoelectric sensor clamping device and method, the beneficial effect of the patent of the present invention is that the angle of the photoelectric sensor can be adjusted by the angle adjustment device, so that the reflective sheet on the fan blade can be accurately aligned, which solves the measurement difficulty caused by the opacity of the fan pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the device described in the patent of this invention.

[0010] Figure 2 It is a schematic diagram of the overall structure of the device described in the patent of this invention.

[0011] Reference numerals: 1 reflective sheet, 2 photoelectric sensor, 3 control module, 4 display screen. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below with reference to the embodiments and accompanying drawings:

[0013] like Figure 1 and Figure 2 As shown, the photoelectric sensor speed measuring device described in this embodiment includes a photoelectric sensor, a reflective sheet, an angle adjustment device, a digital-to-analog conversion module, a control module, and a display screen.

[0014] In this embodiment, the reflective sheet is attached to the blades of the fan to be tested, the photoelectric sensor is fixed to the angle adjustment device, and the assembled device is connected to the opaque pipe of the fan to be tested.

[0015] In this embodiment, the photoelectric sensor is aligned with the reflective sheet through the angle adjustment device. When the fan is turned on, the photoelectric sensor receives the reflected light signal from the reflective sheet.

[0016] In this embodiment, the output signal of the photoelectric sensor is a frequency signal, which indicates the speed of the fan. The signal is converted into a 0-5V analog output by the control module (i.e., AD converter), and the fan speed can be obtained on the display screen after the conversion.

[0017] The above examples are only used to help understand the core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A portable fan speed measuring device, characterized in that: It includes: 1 reflective sheet, 2 photoelectric sensor, 3 control module and 4 display screen. The reflective sheet is attached to the fan blade of the wind turbine to be tested, and the photoelectric sensor is connected to the control module. The photoelectric sensor is used to emit detection light to the reflective sheet; The reflective sheet is used to receive the detection light and emit reflected light; The photoelectric sensor is also used to receive reflected light and generate a reflected photoelectric signal; The control module is used to determine the rotation speed of the wind turbine to be tested according to the reflected photoelectric signal.

2. The portable fan speed measuring device according to claim 1, characterized in that: It also includes: an angle adjustment device, wherein a first end of the angle adjustment device is connected to the photoelectric sensor, and a second end of the angle adjustment device is connected to the control module; The angle adjustment device is used to fix the photoelectric sensor and adjust the angle of the photoelectric sensor.

3. The portable fan speed measuring device according to claim 1, characterized in that: It also includes: a digital-to-analog conversion module, wherein a first end of the digital-to-analog conversion module is connected to the photoelectric sensor, and a second end of the digital-to-analog conversion module is connected to the control module;” The digital-to-analog conversion module is used to convert the reflected light photoelectric signal into a digital signal and send the digital signal to the control module.

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