V-shaped wind speed measuring device

Abstract

The utility model discloses a V-shaped wind speed measuring device, a sensor is used for measuring relevant parameters of wind, the sensor comprises a positive pressure acquisition tube and a negative pressure acquisition tube, the positive pressure acquisition tube and the negative pressure acquisition tube are used for acquiring a wind pressure difference value to the sensor, and the V-shaped wind speed measuring device is characterized in that the sensor also comprises a V-shaped measuring sheet baffle plate; the V-shaped measuring piece baffle is arranged above the negative pressure collecting pipe and below the positive pressure collecting pipe, the two sides of the V-shaped measuring piece baffle are inclined downwards, a pressure leading opening of the positive pressure collecting pipe faces downwards, and the V-shaped measuring piece baffle blocks a pressure leading opening of the negative pressure collecting pipe; the problems of rain and dust blockage are solved by changing the direction of a pressure acquisition point and creating a new pressure area, compared with a traditional wind pressure type sensor, the structure of the wind pressure type sensor has essential difference between a wind speed acquisition point and a pressure difference area, and the industrial application range is greatly expanded.

Description

Technical Field

[0001] The utility model relates to the field of transmitters used in industrial environments, in particular to a V-shaped wind speed measuring device. Background Art

[0002] There are four commonly used principles for measuring wind speed: three-cup wind speed sensor (calculates wind speed by measuring rotational speed), ultrasonic wind speed sensor (calculates wind speed by calculating the difference in sound wave speed), thermal wind speed sensor (calculates wind speed by measuring the heat dissipation rate of the thermal chip), and wind pressure sensor (calculates wind speed by measuring wind pressure). The above four measurement methods are all measurement principles.

[0003] Among them, the wind pressure sensor is currently in the form of an S-shaped pitot tube structure, which is mainly used in clean wind tunnel ducts in industrial environments. However, if there are pollutants such as dust and rainwater in the duct, these substances will often block the sensor's collection point, making it impossible to collect pressure and causing the sensor to malfunction. If the dust blockage can be solved by manual cleaning, but it often becomes blocked within a week, so manual cleaning is time-consuming and labor-intensive. If liquids such as rainwater enter, the risk level will be even higher, and the sensor may be damaged due to a short circuit. Reference Figure 1 The positive pressure collection port (i.e., the pressure inlet of the positive pressure collection tube) of the traditional S-type Pitot tube structure faces the wind outlet. Therefore, when there are dust particles or rainwater in the wind tunnel, the pollutants will enter the pressure collection port under the action of the wind and accumulate at the pressure collection port, causing the collection port to be blocked. As a result, the traditional S-type Pitot tube cannot be used in polluted wind tunnels. Some people have some controversy about this structure, such as why the opening should be vertically upward facing the wind direction. According to Pascal's principle, the pressure at each point in this area is the same, and the opening can be facing any direction. However, due to the limitations of this structure, when the positive pressure collection port is opened to the left (to avoid dust accumulation), the pressure difference between the positive and negative pressure collection ports will be very small, making it impossible to calculate the wind speed or the wind speed deviation is too large.

[0004] Faced with this harsh industrial environment, the current method used by those in this field is to use ultrasonic sensors for measurement. While these sensors can effectively prevent rain, they can also become ineffective due to clogging or even wear of the ultrasonic generator by dust or solid particles. This measurement solution is only relatively effective, not ideal. Cup-type and thermal-type measurement methods are even more inoperable because cup-type bearings and thermal-type chips can be damaged by dust wear. In summary, solving this industry's difficulties presents the following challenges:

[0005] There is currently no better solution in the industry for wind speed measurement in contaminated wind tunnels.

[0006] Wind pressure sensors can measure wind speed perfectly, but they are easily clogged and need to be cleaned and waterproofed.

[0007] Improvements can be made through materials science to increase bearing life and chip wear resistance, but the cost and expense are prohibitive and may not be feasible. Therefore, we aim to address this industry challenge by designing a new structure based on the wind pressure principle.

[0008] Therefore, there is an urgent need to design a new structure by adopting the wind pressure principle, which is simple in structure and low in cost, to solve the problem that transmitters used in industrial occasions cannot operate normally due to dust and rain in the wind tunnel. Utility Model Content

[0009] In order to solve the above problems, the utility model provides a V-shaped wind speed measuring device. Based on the principle of wind pressure sensor, a new structure is designed to solve the problems of rain and dust blockage by changing the direction of pressure collection point and creating a new pressure zone. Compared with traditional wind pressure sensors, the structure of the utility model has essential differences in wind speed collection point and pressure difference area, which greatly expands the scope of industry application.

[0010] The technical solution adopted in this utility model is:

[0011] The utility model provides a V-shaped wind speed measuring device, including a side piece sensor, which is used to measure the direction of wind or the distribution of wind speed. The sensor includes a positive pressure collection tube and a negative pressure collection tube, which are used to collect wind pressure differences to the sensor. The sensor also includes a V-shaped measuring piece baffle, which is arranged above the negative pressure collection tube and below the positive pressure collection tube. Both sides of the V-shaped measuring piece baffle are inclined downward, the pressure inlet of the positive pressure collection tube is downward, and the V-shaped measuring piece baffle blocks the pressure inlet of the negative pressure collection tube.

[0012] Furthermore, the V-shaped measuring piece baffle includes a middle plate and two side wings, and the two side wings are respectively fixedly connected to two side edges of the middle plate.

[0013] Furthermore, the two side wings of the V-shaped measuring piece baffle are inclined downward at an angle of 30° to the horizontal plane.

[0014] Furthermore, the tail of the positive pressure collection tube is in contact with the tail of the negative pressure collection tube, the middle of the positive pressure collection tube bends upward and extends and then bends downward, and the pressure inlet of the positive pressure collection tube and the middle flat plate of the V-shaped measuring piece baffle are arranged opposite to each other.

[0015] Furthermore, the tails of the positive pressure collection tube and the negative pressure collection tube fit tightly together, the tail of the V-shaped measuring piece baffle fits tightly together with the middle of the positive pressure collection tube and the middle of the negative pressure collection tube, and the head of the V-shaped measuring piece baffle extends forward and exceeds the negative pressure collection tube.

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model can use part of the existing wind speed measuring device and only change the sensor structure, which greatly saves costs.

[0018] 2. This utility model can achieve IPX4 protection level and LC1 dust test level while ensuring high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the structural diagram of a traditional S-type Pitot tube.

[0020] Figure 2 Schematic diagram of the structure of the V-type wind speed measuring device of this embodiment.

[0021] Figure 3 This is a partial cross-sectional view of the V-shaped wind speed measuring device of this embodiment;

[0022] In the figure, 1 is a polluted air source with dust or water, 2 is a positive pressure collection pipe, 3 is a negative pressure collection pipe, and 4 is a V-shaped side baffle.

[0023] Figure 4 This is a structural principle simulation diagram of the V-type wind speed measurement device of this embodiment.

[0024] Figure 5 This is a verification simulation diagram of the V-type wind speed measurement device of this embodiment.

[0025] Figure 6 This is another verification simulation diagram of the V-type wind speed measurement device of this embodiment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment.

[0027] refer to Figure 2 and Figure 3, a V-shaped wind speed measuring device, the wind speed measuring device adopts a wind speed transmitter host, including a sensor, the sensor is used to measure wind force or wind speed distribution and other related parameters, the sensor includes a positive pressure collection tube and a negative pressure collection tube and a V-shaped measuring piece baffle, the positive pressure collection tube and the negative pressure collection tube are used to collect wind pressure difference to the sensor, the V-shaped measuring piece baffle is set above the negative pressure collection tube and below the positive pressure collection tube, the two sides of the V-shaped measuring piece baffle are inclined downward, the pressure inlet (positive pressure collection port) of the positive pressure collection tube is above the baffle and Facing downward, the pressure inlet of the negative pressure collection pipe (negative pressure collection port) is below the baffle. The V-shaped measuring piece baffle is used to create a reasonable positive and negative wind pressure environment. The V-shaped measuring piece acts as a windshield in structure. The windward side (positive pressure collection port) is under normal wind pressure. The leeward side (negative pressure collection port) has a much lower pressure than the positive pressure port because the baffle blocks the flow of wind. Therefore, the pressure difference can still be very large. The pressure collected by the positive pressure collection port is the pressure in the positive pressure area of ​​the measuring piece baffle, and the pressure collected by the negative pressure collection port is the pressure in the negative pressure area under the baffle.

[0028] The V-shaped measuring plate baffle includes a middle plate and two side wings, and the two side wings are fixedly connected to the two side edges of the middle plate respectively.

[0029] The downward inclination angles on both sides are 30° to the horizontal plane, the tail of the positive pressure collection tube is in contact with the tail of the negative pressure collection tube, the middle part of the positive pressure collection tube is bent upward and then bent downward, the pressure inlet of the positive pressure collection tube and the middle flat plate of the V-shaped measuring piece baffle are arranged opposite to each other; the tail of the positive pressure collection tube and the negative pressure collection tube are tightly fitted, the tail of the V-shaped measuring piece baffle is tightly fitted with the middle of the positive pressure collection tube and the middle of the negative pressure collection tube, and the head of the V-shaped measuring piece baffle extends forward and exceeds the negative pressure collection tube.

[0030] refer to Figure 4 The working principle of this embodiment is as follows: because the two sides of the V-shaped measuring piece are inclined downward, when the wind flows through the positive pressure port, dust and water will be carried away by the wind, and will not accumulate at the positive pressure collection port, so there will be no blockage. Because the negative pressure collection port is located on the lower side of the measuring piece, the V-shaped measuring piece forms a structure similar to a rain eave, which effectively shields the negative pressure collection port from dust and water, thereby solving the problem that transmitters used in traditional industrial situations cannot operate normally due to dust and rain in the wind tunnel. Although the windward side (positive pressure collection port) is not directly facing the wind port like the traditional S-shaped pitot tube structure, and has normal wind pressure, the leeward side (negative pressure collection port) has a much lower pressure than the positive pressure port due to the baffle blocking the flow of wind. The pressure difference is large, so the wind speed can be calculated or the wind speed deviation is too large, ensuring the high-precision measurement requirements of the sensor. This structure only changes the sensor structure in the existing wind speed measurement device, which is low-cost and easy to produce.

[0031] refer to Figure 5 and Figure 6The pressure at the positive pressure collection port is 101570Pa, and the pressure at the negative pressure collection port is 101141Pa. The difference is 429Pa, which is greater than 200Pa (according to the sensor manual, a pressure difference greater than 1Pa can be collected and calculated, and here it is much greater than 1Pa), so it meets the high-precision measurement requirements of the sensor.

[0032] The V-shaped wind speed measurement device provided in this embodiment, according to prototype testing by a third-party organization, demonstrates that the measurement section of the collection and measurement section meets the IPX4 protection level and the LC1 dust test rating. Prototype testing demonstrates an error of ±0.5 m / s at wind speeds between 0 and 15 m / s, and ±3% at wind speeds greater than 15 m / s. This low-cost device can address dust clogging and rain exposure issues at both the positive and negative pressure collection ports while ensuring high-precision sensor measurement.

[0033] 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 principles of the present invention. These improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A V-shaped wind speed measuring device, comprising a sensor for measuring wind-related parameters, the sensor comprising a positive pressure collection tube and a negative pressure collection tube, the positive pressure collection tube and the negative pressure collection tube being used to collect wind pressure differences to the sensor, characterized in that: The sensor also includes a V-shaped measuring piece baffle, which is arranged above the negative pressure collection tube and below the positive pressure collection tube. The two sides of the V-shaped measuring piece baffle are inclined downward, the pressure inlet of the positive pressure collection tube is facing downward, and the V-shaped measuring piece baffle blocks the pressure inlet of the negative pressure collection tube.

2. A V-shaped wind speed measuring device according to claim 1, characterized in that: The V-shaped measuring piece baffle comprises a middle plate and two side wings, and the two side wings are respectively fixedly connected to two side edges of the middle plate.

3. A V-shaped wind speed measuring device according to claim 2, characterized in that: The two side wings of the V-shaped measuring piece baffle are inclined downward at an angle of 30 degrees to the horizontal plane.

4. A V-shaped wind speed measuring device according to claim 2, characterized in that: The tail of the positive pressure collection tube contacts the tail of the negative pressure collection tube, the middle of the positive pressure collection tube bends upward and extends and then bends downward, and the pressure inlet of the positive pressure collection tube and the middle flat plate of the V-shaped measuring piece baffle are arranged oppositely.

5. A V-shaped wind speed measuring device according to claim 4, characterized in that: The tails of the positive pressure collection tube and the negative pressure collection tube fit tightly together, the tail of the V-shaped measuring piece baffle fits tightly together with the middle of the positive pressure collection tube and the middle of the negative pressure collection tube, and the head of the V-shaped measuring piece baffle extends forward and exceeds the negative pressure collection tube.

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