An object density testing device

Abstract

The utility model discloses a kind of object density testing devices, it includes: liquid receiving tank, input type liquid level changer, density calculator, display and weighing device;Input type liquid level changer is arranged at the bottom of liquid receiving tank, input type liquid level changer is used to detect the liquid level height value of liquid in the liquid receiving tank, input type liquid level changer is electrically connected with the density calculator;Display is electrically connected with the density calculator, and display is used to show density value;Weighing device is used to weigh the weight of object to be tested, and weighing device is electrically connected with density calculator.The utility model's input type liquid level changer is high in accuracy, and liquid level height measurement accuracy will not be influenced by water surface fluctuation, and the precision of weighing device is gram level, so that the final test result is high in accuracy.

Description

Technical Field

[0001] This utility model relates to an object density testing device. Background Technology

[0002] When calculating the density of an object, it is calculated using the formula "density = mass / volume, i.e., ρ = m / V". Mass can be obtained by weighing with an electronic scale, while volume requires measurement and calculation of the object's dimensions. However, in practical applications, it has been found that measuring the dimensions of an object requires a high degree of regularity and precision. If the object is too large or irregularly shaped, inaccurate measurements or even the inability to measure dimensions can occur, making it impossible to calculate volume and density. Patent CN205941259U uses the following method: constructing a sufficiently large water tank and filling it with a certain amount of water; placing a scale above the tank; placing a square iron rod above the scale with two ropes hanging down to the tank, with the tank ends attached to the two ends of the object being measured; submerging the object in the water; and observing the weight of the object in the water using the scale. However, this patent only observes the weight of the object in water, lacking the necessary condition of volume, therefore it cannot calculate the object's density. Furthermore, if the object is large or irregular, it is very difficult to maintain the balance of the square iron rod, the rope, the scale, and the object being measured, posing a significant safety hazard; it is also very difficult to achieve the operation of "tying the rope to both ends of the object". Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of existing technology in measuring the density of irregular objects, such as complicated operation and low measurement accuracy. This utility model provides an object density testing device. The device of this utility model can quickly measure the density of objects, has a high degree of automation, and can achieve batch measurement with high efficiency.

[0004] Before proposing this utility model's technical solution, the inventors attempted to test the density of an object using the traditional water displacement method (that is, placing the sample to be tested in a water tank, measuring the volume of the displaced liquid to determine the volume of the object, and then calculating the object's density based on the object's mass). However, during each test, the displaced water needs to be collected and measured, a process prone to errors leading to inaccurate measurements. Moreover, for batch testing, the operation is complex each time a new sample is added, requiring continuous addition and collection of water, which affects the testing process.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This utility model provides an object density testing device, which includes: a liquid receiving tank, an immersion liquid level changer, a density calculator, a display, and a weighing device;

[0007] The submersible level changer is installed at the bottom of the liquid receiving tank. The submersible level changer is used to detect the liquid level height in the liquid receiving tank. The submersible level changer is electrically connected to the density calculator.

[0008] The display is electrically connected to the density calculator, and the display is used to display density values;

[0009] The weighing device is used to weigh the object to be tested, and the weighing device is electrically connected to the density calculator.

[0010] In this invention, the display can also show intermediate values ​​such as liquid level record value, volume, and weight record value.

[0011] In this invention, preferably, the density calculator and the display are mounted above the liquid receiving tank via a support frame, and the support frame is connected to the tank body of the liquid receiving tank.

[0012] In this invention, preferably, the submersible level changer is located in the area of ​​the liquid receiving tank near the inner wall of the tank, so as to avoid the test object in the liquid receiving tank from affecting the submersible level changer.

[0013] In this invention, the density calculator may be equipped with an empty liquid level recording module, a full liquid level recording module, and a weight recording module.

[0014] In this invention, the weighing device can be a conventional weighing device in the art, such as preferably an electronic crane scale or an electronic floor scale. Preferably, an electronic crane scale is used, which is positioned above the liquid receiving tank for hoisting the object to be tested.

[0015] Preferably, the electronic hook scale is mounted on the robotic arm of the crane, and the object to be tested is transferred into the liquid receiving tank by rotating the robotic arm. The robotic arm can be a conventional type with multiple degrees of freedom, such as rotation, lifting, and lowering, which can achieve the effect of measuring the weight of the object to be tested while it is moving.

[0016] When the weighing device is an electronic weighbridge, the liquid receiving tank is installed on the electronic weighbridge.

[0017] In this invention, the inner cavity of the liquid receiving tank is preferably square or cylindrical, which facilitates the measurement of the horizontal surface area of ​​the liquid receiving tank. When the inner cavity of the liquid receiving tank is square, the horizontal surface area can be obtained through its length and width; when the inner cavity of the liquid receiving tank is cylindrical, the horizontal surface area can be obtained through its radius.

[0018] In this invention, the testing device may further include a power supply, which is connected to the density calculator and used to supply power to components requiring power. The power supply may be a portable power source or a fixed power source.

[0019] In this invention, the submersible level changer and the density calculator are preferably connected via a gas-conducting cable.

[0020] The positive and progressive effects of this utility model are as follows:

[0021] (1) High accuracy of density calculation: The immersion liquid level changer of this utility model has high accuracy and will not affect the accuracy of liquid level measurement due to water surface fluctuations. The weighing device has a gram-level accuracy, which makes the final test results highly accurate.

[0022] (2) Good repeatability and reproducibility: The device of this utility model is easy to operate, has good numerical visualization effect, and simple calculation steps. The repeatability and reproducibility of object measurement are good, and the test results will not differ due to changes in the operator, object, or environment.

[0023] (3) High degree of automation and batch processing capability: This utility model directly displays the density through a density calculator and a display, eliminating the need for manual calculation and enabling batch testing of objects, thereby improving detection efficiency.

[0024] (4) Not limited by the size or shape of the object: This utility model calculates the volume of the object by the water level, and is not limited by the size or shape of the object.

[0025] (5) Low cost: The number of parts in this utility model is small, the procurement cost is low, and the maintenance cost is low. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the object density testing device described in the embodiment.

[0027] The meanings of the labels in the attached diagram are as follows:

[0028] 1-Liquid receiving tank, 2-Submersible liquid level changer, 3-Density calculator, 4-Display, 5-Object to be tested, 6-Gas delivery cable, 7-Support frame, 8-Power supply. Detailed Implementation

[0029] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0030] Example 1

[0031] This embodiment discloses an object density testing device, such as... Figure 1As shown, it includes: a liquid receiving tank 1, an immersion liquid level changer 2, a density calculator 3, a display 4, and a weighing device;

[0032] The submersible level transducer 2 is installed at the bottom of the liquid receiving tank 1. The submersible level transducer 2 is used to detect the liquid level height value in the liquid receiving tank. The accuracy of the submersible level transducer 2 is at the millimeter level. The submersible level transducer 2 is electrically connected to the density calculator 3 through the gas guide cable 6. The submersible level transducer 2 feeds back the detected liquid level height value to the density calculator 3.

[0033] The display 4 is electrically connected to the density calculator 3. The display 4 is used to display density values, and can also display process values ​​such as liquid level record values, volume, and weight record values.

[0034] The weighing device is used to weigh the object 5 to be tested. The weighing device is electrically connected to the density calculator 3, and the weighing device feeds back the detected weight value to the density calculator 3.

[0035] The density calculator 3 in this embodiment uses a conventional single-chip microcomputer structure. The density calculator 3 is equipped with an empty liquid level recording module, a full liquid level recording module, and a weight recording module. The horizontal surface area of ​​the liquid receiving tank 1 is pre-input into the density calculator. The density of the object to be measured can be obtained by calculating density = weight recorded value / (horizontal surface area of ​​the liquid receiving tank * (full liquid level recorded value - empty liquid level recorded value)).

[0036] In this embodiment, the density calculator 3 and the display 4 are mounted above the liquid receiving tank 1 via a support frame 7. The bottom of the support frame 7 is connected to the top of the tank wall of the liquid receiving tank 1, and the density calculator 3 is mounted on the upper part of the support frame 7. The display 4 is integrated into the housing of the density calculator 3.

[0037] In this embodiment, the inner cavity of the liquid receiving tank 1 is square or cylindrical, which facilitates the measurement of the horizontal surface area of ​​the liquid receiving tank. When the inner cavity of the liquid receiving tank is square, the horizontal surface area can be obtained through its length and width; when the inner cavity of the liquid receiving tank is cylindrical, the horizontal surface area can be obtained through its radius.

[0038] In this embodiment, the submersible level changer 2 is located in the area near the inner wall of the liquid receiving tank 1 to prevent the test object 5 in the liquid receiving tank 1 from affecting the submersible level changer 2.

[0039] In this embodiment, the weighing device is an electronic crane scale, which is installed above the liquid receiving tank and used to lift the object 5 to be tested. The electronic crane scale is mounted on the robotic arm of the crane, and the object 5 to be tested is transferred into the liquid receiving tank by rotating the robotic arm.

[0040] In this embodiment, the device also includes a power supply 8, which is connected to the density calculator 3 and is used to supply power to components that require power.

[0041] The following are the steps for testing the density of an object using the testing apparatus described in the above embodiments:

[0042] First, a certain amount of water is stored in the liquid receiving tank 1. After the test object 5 is placed in the liquid receiving tank, the water must completely submerge the test object 5. The empty liquid level is automatically recorded by the density calculator 3.

[0043] Next, the test object 5 is lifted by the electronic hook scale on the crane, at which time the density calculator 3 automatically records the weight value; the test object is then lifted into the container, and the water must completely submerge the test object, at which time the density calculator 3 automatically records the full-load liquid level value.

[0044] Finally, the density calculator 3 calculates the density value of the object 5 to be tested and displays it on the display 4.

[0045] Table 1 shows the test results for the three crucibles when the test object 5 is a crucible.

[0046] Table 1

[0047]

[0048] The device of the above embodiment was calibrated using a pure copper standard sample, and the calibration results showed no error.

[0049] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An object density testing device, characterized in that, It includes: Liquid receiving tank, submersible level changer, density calculator, display and weighing device; The submersible level changer is installed at the bottom of the liquid receiving tank. The submersible level changer is used to detect the liquid level height value in the liquid receiving tank. The submersible level changer is electrically connected to the density calculator. The display is electrically connected to the density calculator, and the display is used to display density values; The weighing device is used to weigh the object to be tested, and the weighing device is electrically connected to the density calculator.

2. The object density testing device as described in claim 1, characterized in that, The density calculator and the display are mounted above the liquid receiving tank via a support frame, which is connected to the tank body.

3. The object density testing device as described in claim 1, characterized in that, The submersible level changer is located in the area near the inner wall of the liquid receiving tank.

4. The object density testing device as described in claim 1, characterized in that, The weighing device is an electronic crane scale, which is installed above the liquid receiving tank and used to lift the object to be tested.

5. The object density testing device as described in claim 4, characterized in that, The electronic hook scale is mounted on the robotic arm of the crane, and the object to be tested is transferred to the liquid receiving tank by rotating the robotic arm.

6. The object density testing device as described in claim 1, characterized in that, The weighing device is an electronic weighbridge, and the liquid receiving tank is installed on the electronic weighbridge.

7. The object density testing device as described in claim 1, characterized in that, The inner cavity of the liquid receiving tank is square or cylindrical.

8. The object density testing device as described in claim 1, characterized in that, It also includes a power supply; the power supply is connected to the density calculator and is used to supply power to components that require power.

9. The object density testing device as described in claim 1, characterized in that, The submersible level changer is connected to the density calculator via a gas-conducting cable.

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