Simulated rainfall control system and control method thereof

Abstract

The application discloses a kind of simulated rainfall control systems and control method thereof, belong to building rain noise detection field.It includes water storage tank, water storage tank is connected with inlet pipe, water level detection device and raindrop formation array;Inlet pipe is provided with inlet pump, electric proportional valve and flow sensor;Raindrop formation array includes horizontally arranged multiple raindrop formation pipes, raindrop formation pipe is communicated with water storage tank and horizontally extends to outside of water storage tank, the bottom of raindrop formation pipe located outside of water storage tank is provided with multiple raindrop water outlet holes, forms raindrop water outlet hole array, and the end of raindrop formation pipe communicated with water storage tank is provided with electric water outlet valve;Control unit controls the opening angle of electric proportional valve, so that the water level of water storage tank is kept at the set height value of forming set rainfall amount.The application can provide continuous, stable, specified rainfall amount simulated rainfall, improve rain noise detection efficiency and detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of building rain noise detection, and in particular to a simulated rainfall control system and its control method. Background Technology

[0002] As people's demands for comfort and health in their living and working environments continue to rise, noise control has become one of the core elements in the evaluation of green and healthy buildings. Rain noise from building components such as roofs, roof / ceiling systems, and skylights is a significant noise source affecting the indoor acoustic environment.

[0003] Rain noise refers to the noise generated indoors due to the vibration radiated by raindrops impacting buildings and building components. Rain noise testing requires simulated rainfall, where raindrops impact buildings and building components, causing vibrations and radiating noise indoors, thereby assessing the noise insulation of the building components.

[0004] However, current technologies only have simple rainfall simulation devices that control simulated rainfall through water tanks. These devices cannot provide continuous, stable, and controlled simulated rainfall, which affects the detection efficiency and accuracy of rain noise detection. Summary of the Invention

[0005] To address the problems of existing technologies, this invention provides a simulated rainfall control system and its control method, which can provide continuous, stable, and predetermined simulated rainfall, thereby improving the efficiency and accuracy of rain noise detection.

[0006] The technical solution provided by this invention is as follows:

[0007] A simulated rainfall control system for detecting rain noise in buildings and building components, the simulated rainfall control system comprising a water storage tank connected to an inlet pipe, a water level detection device, and a raindrop forming array, wherein:

[0008] The inlet pipe is equipped with an inlet pump, an electric proportional valve and a flow sensor;

[0009] The raindrop forming array includes multiple horizontally arranged raindrop forming tubes. The raindrop forming tubes are connected to the water storage tank and extend horizontally to the outside of the water storage tank. Multiple raindrop outlet holes are opened at the bottom of the raindrop forming tubes located outside the water storage tank to form a raindrop outlet hole array. An electric water outlet valve is provided on the end of the raindrop forming tube connected to the water storage tank.

[0010] The inlet pump, electric proportional valve, flow sensor, electric outlet valve, and water level detection device are connected to the control unit. The control unit controls the opening angle of the electric proportional valve to keep the water level in the storage tank at a set height value to generate the set rainfall.

[0011] Furthermore, the end of the raindrop forming tube away from the water storage tank is bent upwards, and the top of the upwardly bent part has an exhaust hole.

[0012] Furthermore, the horizontal and vertical spacing of the raindrop outlet array is 100 mm, and the diameter of the raindrop outlet is 0.8 mm.

[0013] Furthermore, the water storage tank is equipped with a wave-cutting and flow-adjusting device to suppress water level disturbances within the tank.

[0014] Furthermore, the wave-cutting and flow-adjusting device includes a horizontal flow-adjusting plate located inside the water storage tank, with multiple vertical flow-adjusting vanes on the bottom surface of the flow-adjusting plate. The flow-adjusting vanes are placed on the bottom surface of the water storage tank, and the flow-adjusting plate and the bottom surface of the water storage tank are spaced at a set height.

[0015] Furthermore, the water storage tank is rectangular in shape, with the inlet pipe and water level detection device located at opposite ends of the tank's length.

[0016] Furthermore, the horizontal flow vanes are perpendicular to the length of the water storage tank, and multiple horizontal flow vanes are arranged parallel to each other at intervals along the length of the water storage tank.

[0017] Furthermore, there is a set gap between the flow plate and the side wall of the water tank, and there is a set distance between the outermost edge of the flow plate and the outermost edge of the flow plate.

[0018] Furthermore, the water level detection device includes a vertically arranged water level display cup and an electronic water level measuring sensor. The bottom of the water level display cup is connected to the water storage tank, and the electronic water level measuring sensor is located at the top of the water level display cup and is connected to the control unit.

[0019] Furthermore, the water level display cup and the water inlet pipe are connected to the inside of the water tank through a through hole on the bottom surface of the water tank.

[0020] A control method applied to the simulated rainfall control system, the method comprising:

[0021] S1: Close the electric outlet valve, turn on the inlet pump, and open the electric proportional valve to supply water to the storage tank;

[0022] S2: The water level rise height l within a set time interval Δt is detected by the water level detection device, and the inflow rate j is calculated;

[0023] in, s is the bottom area of ​​the water storage tank;

[0024] S3: Determine whether the inlet flow rate j is equal to the set rainfall amount y. If not, adjust the opening angle of the electric proportional valve according to the following formula until the inlet flow rate j is equal to the set rainfall amount y, and store the opening angle of the electric proportional valve at this time.

[0025] Among them, the adjustment amount of the opening angle of the electric proportional valve each time x and z are the magnification factor and the reduction factor, respectively;

[0026] S4: Close the electric proportional valve and the inlet pump, open the electric outlet valve, and the water in the storage tank will form a simulated rainfall by forming a raindrop array;

[0027] S5: Detect the water level drop height h within a set time interval Δt using a water level detection device, and calculate the actual rainfall y';

[0028] in, ;

[0029] S6: Obtain the water level height value Q0 when the actual rainfall y' is equal to the set rainfall y through the water level detection device, and store it;

[0030] S7: Turn on the inlet pump, open the electric proportional valve to the stored opening angle, and open the electric outlet valve to simulate rainfall;

[0031] S8: Obtain the real-time water level height value Q1 through the water level detection device, and determine whether the real-time water level height value Q1 is equal to the stored water level height value Q0. If not, adjust the opening angle of the electric proportional valve according to the following formula to ensure that the real-time water level height value Q1 is always equal to the stored water level height value Q0.

[0032] Among them, the adjustment amount of the opening angle of the electric proportional valve each time r is the current opening angle of the electric proportional valve, and X is the variation coefficient of the electric proportional valve.

[0033] The present invention has the following beneficial effects:

[0034] This invention uses a water level detection device, an inlet pump, an electric proportional valve, a flow sensor, and an electric outlet valve to control the water level in the storage tank to maintain a set level, providing a fixed flow rate for the raindrop outlet array, forming continuous, stable, and regulated simulated rainfall, thus improving the efficiency and accuracy of rain noise detection. Attached Figure Description

[0035] Figure 1 This is a perspective view of the simulated rainfall control system of the present invention;

[0036] Figure 2 This is a front view of the simulated rainfall control system of the present invention;

[0037] Figure 3 This is a schematic diagram of a wave-clipping and flow-adjusting device;

[0038] Figure 4 This is a schematic diagram of the assembly of the wave-shaving and flow-adjusting device and the water storage tank.

[0039] Figure 5 for Figure 4 Top view;

[0040] Figure 6 for Figure 4 Side view. Detailed Implementation

[0041] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0042] This invention provides a simulated rainfall control system for detecting rain noise in buildings and building components, such as... Figure 1-6 As shown, the simulated rainfall control system includes a water storage tank 1, which is connected to an inlet pipe 2, a water level detection device 3, and a raindrop forming array 4, wherein:

[0043] The inlet pipe 2 is connected to an external water supply source and is equipped with an inlet pump 5 (which can be a pressure-balanced water pump), an electric proportional valve 6, and a flow sensor 7.

[0044] The raindrop forming array 4 includes multiple horizontally arranged raindrop forming tubes 8. The raindrop forming tubes 8 are connected to the water storage tank 1 and extend horizontally to the outside of the water storage tank 1. Multiple raindrop outlet holes are opened at the bottom of the raindrop forming tubes 8 located outside the water storage tank 1 to form an array of raindrop outlet holes. An electric water outlet valve 9 is provided on the end of the raindrop forming tube 8 that is connected to the water storage tank 1.

[0045] The inlet pump 5, electric proportional valve 6, flow sensor 7, electric outlet valve 9 and water level detection device 3 are connected to the control unit 16. The control unit 16 controls the opening angle of the electric proportional valve 6 to keep the water level in the water storage tank 1 at the set height value for the formation of the set rainfall.

[0046] This invention is a simulated rainfall control system for rain noise detection, designed and developed according to the requirements of national standard GB / T19889.18.2017. Through the control of a water level detection device 3, an inlet pump 5, an electric proportional valve 6, a flow sensor 7, and an electric outlet valve 9, the technical goal is to maintain the water level in the storage tank 1 at a set level after the radius of the raindrop outlet holes is determined, thus providing a fixed flow rate to the raindrop outlet array to maintain a specified rainfall amount. This invention can generate continuous, stable, and specified simulated rainfall, improving the efficiency and accuracy of rain noise detection.

[0047] In this invention, the end of the raindrop forming tube 8 away from the water storage tank 1 is bent upwards, and the top of the upwardly bent portion has an vent 10. The function of the vent 10 is to enable the water in the tube to be distributed quickly and evenly, and to prevent air in the tube from obstructing the rapid and even distribution of the water flow.

[0048] In one example, the array of raindrop outlets has a horizontal and vertical spacing of 100 mm, and the diameter of the raindrop outlets is 0.8 mm, providing the required amount of rainfall.

[0049] The water storage tank 1 is a container with an area of ​​1 square meter, a height greater than 300 mm, and a volume greater than 3 cubic meters. The area is designed to be 1 square meter to facilitate the controller's calculation of rainfall and inlet flow. The inlet pipe 2 and the water level detection device 3 are located at opposite ends of the length of the water storage tank 1 to reduce the impact of water inflow fluctuations on the water level detection device 3.

[0050] The water storage tank 1 is equipped with a wave-shaving and flow-regulating device 11 to suppress water level disturbances in the water storage tank 1. When external water is rapidly injected into the water storage tank 1, it reduces water waves and excessive water level differences at the water inlet and water level detection device 3.

[0051] The wave-cutting and flow-leveling device 11 includes a horizontal flow-leveling plate 12 located inside the water storage tank 1. The bottom surface of the flow-leveling plate 12 is provided with a plurality of vertical flow-leveling blades 13. The flow-leveling blades 13 are placed on the bottom surface of the water storage tank 1, and the flow-leveling plate 12 and the bottom surface of the water storage tank 1 are spaced at a set height.

[0052] The horizontal flow plate 13 is perpendicular to the length direction of the water storage tank 1, and multiple horizontal flow plates 13 are arranged parallel to each other along the length direction of the water storage tank 1 to reduce the water waves generated by the water inlet pipe 2 layer by layer.

[0053] There is a set gap between the flow plate 12 and the side wall of the water storage tank 1, and there is a set distance between the outermost edge of the flow plate 13 and the outermost edge of the flow plate 12 so that the water can flow smoothly.

[0054] See Figure 4-6 The direction of the water flow shown in the image indicates that the wave-trimming and flow-regulating device 11 restricts the water flow and reduces water level fluctuations.

[0055] The water level detection device 3 includes a vertically arranged water level display cup 14 and an electronic water level measuring sensor 15. The bottom end of the water level display cup 14 is connected to the water storage tank 1, and the electronic water level measuring sensor 15 is located at the top of the water level display cup 14 and is connected to the control unit. The electronic water level measuring sensor 15 is an ultrasonic height measuring sensor with a measurement accuracy of 0.1 mm.

[0056] The water level display cup 14 and the water inlet pipe 2 are connected to the inside of the water storage tank 1 through the through hole on the bottom surface of the water storage tank 1, so that water enters from the bottom and reduces water fluctuation.

[0057] This invention also provides a control method applied to the simulated rainfall control system. Generally speaking, the method involves measuring the water level in the storage tank using a water level detection device; automatically controlling the balance between inflow and outflow using a proportional valve for fine-tuning; and automatically setting the water level in the tank based on a set value for the amount of rainfall.

[0058] Specifically, the control method includes:

[0059] S1: Close the electric outlet valve, turn on the inlet pump, and open the electric proportional valve to supply water to the storage tank.

[0060] The purpose of this step is to determine the angle at which the electric proportional valve opens under a certain water pressure, so that the water flow rate is equal to the set rainfall. First, close the electric outlet valve, then turn on the inlet pump to ensure sufficient water supply, and then open the electric proportional valve to supply water to the storage tank.

[0061] S2: The water level rise height l within a set time interval Δt is detected by the water level detection device, and the inflow rate j is calculated.

[0062] in, s is the bottom area of ​​the water storage tank.

[0063] For example, the data from the water level detection device is read periodically (every 200 milliseconds) to determine the height of the water level rise in the storage tank per unit time, and the inflow rate (i.e., rainfall) is calculated according to the above formula.

[0064] S3: Determine whether the inlet flow rate j is equal to the set rainfall amount y. If not, adjust the opening angle of the electric proportional valve according to the following formula until the inlet flow rate j is equal to the set rainfall amount y, and store the opening angle of the electric proportional valve at this time.

[0065] Among them, the adjustment amount of the opening angle of the electric proportional valve each time x is the amplification factor for the difference between the set rainfall and the inlet flow rate, and z is the reduction factor for the difference between the set rainfall and the inlet flow rate. x / z determines the opening angle of the proportional valve. A larger difference results in a larger opening ratio, and a smaller difference results in a smaller opening ratio.

[0066] Specifically, if the inflow rate is less than the set rainfall amount, the proportional valve opening ratio is adjusted according to the above formula (Δr1 is a positive value), and the valve is opened wider; if the inflow rate is greater than the set rainfall amount, the proportional valve opening ratio is adjusted according to the above formula (Δr1 is a negative value), and the valve is closed smaller.

[0067] After the inlet flow rate is adjusted to match the set rainfall amount, the proportional valve adjustment stops, and the valve opening angle value equal to the set rainfall amount is stored. After storing the valve opening angle data, it checks if the water level in the tank has reached the maximum storage level. If not, the proportional valve is opened to its maximum value to quickly raise the water level to the maximum storage level. Once the maximum storage level is reached, the pressure balancing pump is shut off, and the proportional valve is closed to stop water supply to the tank. The inlet water control process is now complete.

[0068] S4: Close the electric proportional valve and the inlet pump, open the electric outlet valve, and the water in the storage tank forms a simulated rainfall by forming an array of raindrops.

[0069] S5: Detect the water level drop height h within a set time interval Δt using a water level detection device, and calculate the actual rainfall y'.

[0070] in, .

[0071] The purpose of this step is to determine at what water level in the storage tank the outflow rate equals the set rainfall amount. First, the water inlet is closed, then the outflow rain solenoid valve is opened, raindrops are formed into an array and discharged, and the water level sensor in the tank is read periodically to calculate the current outflow rate according to the formula.

[0072] S6: Obtain the water level height value Q0 when the actual rainfall y' is equal to the set rainfall y through the water level detection device, and store it.

[0073] When the current outflow rate is equal to the set rainfall value, save the current water level in the tank, close the outflow solenoid valve, stop the outflow and rainfall, and the outflow control step ends.

[0074] S7: Turn on the inlet pump, open the electric proportional valve to the stored opening angle, open the electric outlet valve, and simulate rainfall.

[0075] S8: Obtain the real-time water level height value Q1 through the water level detection device, and determine whether the real-time water level height value Q1 is equal to the stored water level height value Q0. If not, adjust the opening angle of the electric proportional valve according to the following formula to ensure that the real-time water level height value Q1 is always equal to the stored water level height value Q0.

[0076] Among them, the adjustment amount of the opening angle of the electric proportional valve each time r is the current opening angle of the electric proportional valve, and X is the variation coefficient of the electric proportional valve.

[0077] The purpose of this step is to maintain a balance between the outflow and inflow rates, ensuring that the outflow rainfall remains constant at the set rainfall value. First, the pressure balancing pump is turned on, and the stored valve opening angle value is retrieved to open the proportional valve to the set rainfall angle. Then, the outflow rainfall solenoid valve is opened to simulate rainfall. The water level in the tank is read in real time. When the water level exceeds the value saved in the second step, the formula is applied... Adjust the proportional valve to close it slightly. When the water level in the tank is lower than the water level value saved in the second step, apply the formula... Adjust the proportional valve to open it wider.

[0078] The cyclic adjustment ensures that the influent flow rate maintains the water level in the tank, which is the water level value saved in the second step, thus ensuring that the outflow rainfall is constant at the set rainfall value.

[0079] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A simulated rainfall control system, characterized in that, For rain noise detection of buildings and building components, the simulated rainfall control system includes a water storage tank connected to an inlet pipe, a water level detection device, and a raindrop forming array, wherein: The inlet pipe is equipped with an inlet pump, an electric proportional valve and a flow sensor; The raindrop forming array includes multiple horizontally arranged raindrop forming tubes. The raindrop forming tubes are connected to the water storage tank and extend horizontally to the outside of the water storage tank. Multiple raindrop outlet holes are opened at the bottom of the raindrop forming tubes located outside the water storage tank to form a raindrop outlet hole array. An electric water outlet valve is provided on the end of the raindrop forming tube connected to the water storage tank. The inlet pump, electric proportional valve, flow sensor, electric outlet valve, and water level detection device are connected to the control unit. The control unit controls the opening angle of the electric proportional valve to keep the water level in the storage tank at a set height value to generate the set rainfall.

2. The simulated rainfall control system according to claim 1, characterized in that, The end of the raindrop forming tube away from the water storage tank is bent upwards, and the top of the upwardly bent portion has an exhaust port.

3. The simulated rainfall control system according to claim 2, characterized in that, The horizontal and vertical spacing of the raindrop outlet array is 100 mm, and the diameter of the raindrop outlet is 0.8 mm.

4. The simulated rainfall control system according to any one of claims 1-3, characterized in that, The water storage tank is equipped with a wave-cutting and flow-adjusting device to suppress water level disturbances within the tank.

5. The simulated rainfall control system according to claim 4, characterized in that, The wave-cutting and flow-leveling device includes a horizontal flow-leveling plate located inside the water storage tank. The bottom surface of the flow-leveling plate is provided with a plurality of vertical flow-leveling vanes, which are placed on the bottom surface of the water storage tank. The flow-leveling plate and the bottom surface of the water storage tank are spaced at a set height apart.

6. The simulated rainfall control system according to claim 5, characterized in that, The water storage tank is rectangular in shape, and the water inlet pipe and water level detection device are located at opposite ends of the length of the water storage tank.

7. The simulated rainfall control system according to claim 6, characterized in that, The horizontal flow vane is perpendicular to the length direction of the water storage tank, and multiple horizontal flow vanes are arranged parallel to each other at intervals along the length direction of the water storage tank.

8. The simulated rainfall control system according to claim 7, characterized in that, There is a set gap between the flow plate and the side wall of the water storage tank, and there is a set distance between the outermost edge of the flow plate and the outermost edge of the flow plate.

9. The simulated rainfall control system according to claim 6, characterized in that, The water level detection device includes a vertically arranged water level display cup and an electronic water level measuring sensor. The bottom of the water level display cup is connected to the water storage tank, and the electronic water level measuring sensor is located at the top of the water level display cup and is connected to the control unit.

10. The simulated rainfall control system according to claim 9, characterized in that, The water level display cup and the water inlet pipe are connected to the inside of the water storage tank through a through hole on the bottom surface of the water storage tank.

11. A control method, characterized in that, The method, applied to the simulated rainfall control system according to any one of claims 1-10, comprises: S1: Close the electric outlet valve, turn on the inlet pump, and open the electric proportional valve to supply water to the storage tank; S2: The water level rise height l within a set time interval Δt is detected by the water level detection device, and the inflow rate j is calculated; in, s is the bottom area of ​​the water storage tank; S3: Determine whether the inlet flow rate j is equal to the set rainfall amount y. If not, adjust the opening angle of the electric proportional valve according to the following formula until the inlet flow rate j is equal to the set rainfall amount y, and store the opening angle of the electric proportional valve at this time. Among them, the adjustment amount of the opening angle of the electric proportional valve each time x and z are the magnification factor and the reduction factor, respectively; S4: Close the electric proportional valve and the inlet pump, open the electric outlet valve, and the water in the storage tank will form a simulated rainfall by forming a raindrop array; S5: The water level drop height h within a set time interval Δt is detected by the water level detection device, and the actual rainfall y' is calculated; in, ; S6: Obtain the water level height value Q0 when the actual rainfall y' is equal to the set rainfall y through the water level detection device, and store it; S7: Turn on the inlet pump, open the electric proportional valve to the stored opening angle, and open the electric outlet valve to simulate rainfall; S8: Obtain the real-time water level height value Q1 through the water level detection device, and determine whether the real-time water level height value Q1 is equal to the stored water level height value Q0. If not, adjust the opening angle of the electric proportional valve according to the following formula to ensure that the real-time water level height value Q1 is always equal to the stored water level height value Q0. Among them, the adjustment amount of the opening angle of the electric proportional valve each time r is the current opening angle of the electric proportional valve, and X is the variation coefficient of the electric proportional valve.

Images