A verification and demonstration device that the amount of rain falling on the front of the human body within a fixed distance is independent of the passing speed

Abstract

The present invention discloses a verification and demonstration instrument that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed, comprising a water reservoir, a bracket provided in the water reservoir, a water shower trough provided on the bracket, water discharge holes arranged in a rectangular array in the water shower trough, left and right guide rails provided at the lower part of the bracket, two guide rails arranged front and back, two guide rails provided on the guide rails, a water storage tank connected thereto, a water inlet window penetrating left and right is provided on the water storage tank, and a baffle is inserted in the water storage tank. The beneficial effects of the present invention are: rainfall simulation is realized by the water shower trough, the amount of rain showering through the water inlet window at a fixed distance is collected and measured by the water storage tank, and then the amount of rain showering on the front of a human body within a fixed distance is measured, and it is proved to be independent of the passing speed of the front of the human body. The verification and demonstration instrument has a simple structure, is easy to manufacture, has a small size, and has a low manufacturing cost, and realizes artificial indoor simulation and calculation.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, in particular to a verification and demonstration instrument in which the amount of rain showering on the front of a human body within a fixed distance is independent of a passing speed. Background Art

[0002] On rainy days, people walking on the road often want to walk faster, thinking that the faster the speed, the less rain the human body will get, and the less likely it will get wet. In fact, the amount of rain that falls on the head and shoulders of the human body is related to the rainfall per unit time and the speed at which the human body passes. The greater the rainfall, the more rain falls on the head and shoulders of the human body when the human body moves at the same speed. The faster the human body passes, the shorter the rain time, and the less rain falls on the human body within a fixed rainfall. However, when the front of the human body passes at different speeds within a fixed distance, the rain it encounters is actually related to the area of ​​the front of the human body, and has nothing to do with the speed. In order to verify this theoretical certification, a device is needed to verify this theory in the laboratory. Summary of the invention

[0003] The object of the present invention is to provide a verification and demonstration instrument in which the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a verification and demonstration instrument for the verification that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed, comprising a water reservoir, a bracket being provided in the water reservoir, a water shower trough being provided on the bracket, water discharge holes arranged in a rectangular array being provided in the water shower trough, left and right guide rails being provided at the lower part of the bracket, two guide rails being arranged front and back, both guide rails being provided with sliders, a water tank being connected thereto, the water tank being provided with water inlet windows penetrating left and right, and a baffle being inserted in the water tank.

[0005] Further preferably, a water pump is connected between the water reservoir and the shower trough.

[0006] Further preferably, the body of the water tank is made of transparent material.

[0007] Further preferably, a sealing ring is provided at the connection between the baffle and the upper box body of the water tank.

[0008] Further preferably, a scale is provided on the side box body of the water tank.

[0009] Further preferably, a guide hole is embedded in the water discharge hole.

[0010] Further preferably, a stepper motor fixed on the water reservoir is connected to the middle of the lower side of the water tank, and the stepper motor is connected to a photoelectric switch module.

[0011] Further preferably, the side box body and baffle of the water tank are both made of transparent acrylic plates.

[0012] Beneficial Effects

[0013] The verification and demonstration instrument of the present invention that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed realizes rainfall simulation through a shower trough, realizes left and right reciprocating movement of a water storage tank on a bracket through a guide rail and a slider structure, and realizes collection and measurement of the amount of rain showering on a water inlet window through a fixed distance through the water storage tank, thereby realizing measurement of the amount of rain showering on the front of a human body within a fixed distance, and proving that it is independent of the passing speed of the front of the human body. The verification and demonstration instrument has a simple structure, is easy to manufacture, has a small size, and has a low manufacturing cost, and realizes artificial indoor simulation and calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric structure of a verification and demonstration instrument for verifying that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed disclosed in an embodiment of the present invention;

[0015] Figure 2 It is a right view of a verification and demonstration instrument for verifying that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed disclosed in an embodiment of the present invention;

[0016] Figure 3 This is a diagram illustrating the calculation of rainfall amount disclosed in an embodiment of the present invention.

[0017] Reference numerals

[0018] 1-water reservoir, 2-bracket, 3-water trough, 4-water hole, 5-guide rail, 6-slider, 7-water tank, 8-water inlet window, 9-baffle. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Example

[0021] like Figure 1-3 As shown, a verification and demonstration instrument for the fact that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed comprises a water reservoir 1, a bracket 2 is arranged in the water reservoir, a water shower trough 3 is mounted on the bracket 2, water discharge holes 4 arranged in a rectangular array are arranged in the water shower trough 3, left and right guide rails 5 are arranged at the lower part of the bracket 2, two guide rails 5 are arranged front and back, and two guide rails 5 are provided with sliders 6, to which a water storage tank 7 is connected, and the water storage tank 7 is provided with water inlet windows 8 penetrating left and right, and a baffle 9 is inserted in the water storage tank 7.

[0022] Preferably, a water pump is connected between the water reservoir 1 and the water shower trough 3 to achieve water circulation between the water reservoir 1 and the water shower trough 3, making the experiment more environmentally friendly and convenient.

[0023] Preferably, the body of the water tank 7 is made of a transparent material, which is convenient for real-time observation of the water intake in the water tank 7 and enables real-time observation.

[0024] Preferably, a sealing ring is provided at the connection between the baffle 9 and the upper box body of the water tank 7 to ensure that water does not enter the water tank 7 from the upper box body of the water tank 7, thereby ensuring the measurement accuracy of the verification display instrument.

[0025] Preferably, a scale is provided on the side box body of the water storage tank 7, and the rainfall amount can be measured more intuitively by reading the value on the scale.

[0026] Preferably, the drain hole 4 is embedded with a guide hole to prevent the outflowing water from connecting into a piece and affecting the experimental data, while making the simulated rain closer to the real situation. In this embodiment, there are 1,300 drain holes 4, so that the water flowing out of the shower trough 3 is closer to rain.

[0027] Preferably, a stepper motor fixed on the water reservoir 1 is connected to the middle of the lower part of the water tank 7, and the stepper motor is connected to a photoelectric switch module for limiting the movement speed and stroke of the water tank 7 to achieve data measurement at different operating speeds within the same stroke.

[0028] Preferably, the side box body and baffle 9 of the water tank 7 are made of transparent acrylic plates, which are convenient for experimenters to observe in real time. At the same time, the baffle 9 can prevent water droplets from entering from the water inlet window 8 on one side of the water tank 7 and flying out from the water inlet window 8 on the other side, thereby affecting the measurement results.

[0029] If Figure 3 As shown, according to the verification and demonstration instrument for verifying that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed described in this embodiment, D, W, and H respectively represent the length, width, and height of the verification and demonstration instrument for verifying that the amount of rain showering on the front of a human body within a fixed distance is independent of the passing speed. The amount of rain showering is calculated: the amount of precipitation per unit time of the drain holes arranged in a rectangular array in the shower trough is Q, the amount of precipitation per unit time is Q to simulate the amount of rainfall per unit time, and the time required for water to fall from a height of H to the ground is t, and the acceleration of gravity is g, then the value of t is:

[0030]

[0031] Let the total rainfall during this time be V1, that is, the actual total water storage volume V1 in the reservoir is:

[0032]

[0033] The volume V2 of the precipitation area of ​​the verification display is:

[0034] V2=WHD,

[0035] Let the amount of precipitation per unit volume be q, then the amount of precipitation q is:

[0036]

[0037] Depend on Figure 3 As shown, the water inlet window simulates the area of ​​rain swept by the front of the human body. The length of the water inlet window is a and the height is h. The volume V3 swept by the water inlet window is:

[0038] V3=ahD,

[0039] Therefore, the rainfall amount P of the water inlet window can be calculated as:

[0040]

[0041] From the above formula of the amount of rain P, it can be known that the amount of rain P on the front of the human body is proportional to the total rainfall V1 in the area where the person passes and the area of ​​the front of the human body, and inversely proportional to the area of ​​the vertical plane of the rainfall area, and has nothing to do with the speed at which the front of the human body passes through the area. Regardless of how fast the front of the human body passes through the rainfall area, the volume of the front of the human body passing through the rainfall area is determined by the area of ​​the front of the human body ah, and has nothing to do with the speed and time of passing, while the volume V3 of the front of the human body passing a fixed distance is fixed, so the amount of rain P on the front of the human body is determined by the rainfall q per unit volume of the area. The greater the rainfall q per unit volume per unit time, the greater the amount of rain P on the front of the human body, and the smaller the rainfall q, the smaller the amount of rain P on the front of the human body.

[0042] The experimental steps for using the verification and demonstration instrument that the amount of rain falling on the front of the human body within a fixed distance is independent of the passing speed are to measure the amount of rain received by the water inlet window at different distances and speeds.

[0043] 1) Different distances are determined by the number of round trips.

[0044] 2) Controlling the rotation speed of the motor shaft at different speeds; comprising the following steps:

[0045] a. Before the experiment, first check whether the slider slides freely;

[0046] b. Set the distance that the slider travels in the rain to L (you can set the maximum stroke of the slider, or you can set a personalized stroke. Due to the limited length of the guide rail, the actual test uses multiple back and forth methods to reduce the error of a single measurement;

[0047] c. Start the rainfall simulation device and simulate the real rainfall process inside the experimental device (note that the amount of water inside the reservoir above the device needs to remain basically unchanged during the entire experiment);

[0048] d. Set and control the running direction and speed of the slider;

[0049] e. When the set running distance L is reached, turn off the power, read and record the rainfall data at this time;

[0050] f. Keep the running distance L unchanged, change the running speed v of the trolley, repeat the test steps b to d, and record the corresponding rainfall data;

[0051] g. Keep the running speed of the slider unchanged, change the running distance L, repeat test steps b to d, and record the corresponding rainfall data.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the invention content within the protection scope of the present invention.

Claims

1. A verification and demonstration device for verifying that the amount of rain falling on the front of a human body within a fixed distance is independent of the passing speed, characterized in that: The invention comprises a water reservoir (1), wherein a support (2) is provided in the water reservoir, a water sprinkling trough (3) is mounted on the support (2), and water discharge holes (4) arranged in a rectangular array are provided in the water sprinkling trough (3), and guide rails (5) arranged on the left and right are provided at the lower part of the support (2), and two guide rails (5) are arranged front and back, and slide blocks (6) are provided on the two guide rails (5), and a water storage tank (7) is connected thereto, and a water inlet window (8) penetrating on the left and right is opened on the water storage tank (7), and a baffle (9) is inserted in the water storage tank (7); The length of the water inlet window is expressed as a , high is represented by h The width and height of the verification display device for verifying that the amount of rain falling on the human body in a fixed distance is independent of the passing speed are expressed as W , H , the actual water storage volume in the reservoir is expressed as V 1. The amount of rain falling on the water inlet window is expressed as P， Then it satisfies: ; A water pump is connected between the water reservoir (1) and the water trough (3); The body of the water storage tank (7) is made of a transparent material.

2. The verification and demonstration device for the determination that the amount of rain falling on the front of a human body within a fixed distance is independent of the passing speed according to claim 1, characterized in that: A sealing ring is provided at the connection between the baffle plate (9) and the upper box body of the water storage tank (7).

3. The verification and demonstration device for the determination that the amount of rain falling on the front of a human body within a fixed distance is independent of the passing speed according to claim 1, characterized in that: A scale is provided on the side box body of the water storage tank (7).

4. The verification and demonstration device for the determination of the irrelevance of the amount of rain falling on the front of a human body within a fixed distance to the passing speed according to claim 1, characterized in that: The water discharge hole (4) is embedded with a flow guide hole.

5. The verification and demonstration device for the determination that the amount of rain falling on the front of a human body within a fixed distance is independent of the passing speed according to claim 1, characterized in that: A stepper motor fixed on the water reservoir (1) is connected to the middle of the lower side of the water storage tank (7), and the stepper motor is connected to a photoelectric switch module.

6. The verification and demonstration device for the determination that the amount of rain falling on the front of a human body within a fixed distance is independent of the passing speed according to claim 1, characterized in that: The side box body and the baffle plate (9) of the water storage tank (7) are both made of transparent acrylic plates.

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