CN210571818U - Device for measuring volume and volume expansion coefficient of object - Google Patents
Device for measuring volume and volume expansion coefficient of object Download PDFInfo
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- CN210571818U CN210571818U CN201920560152.5U CN201920560152U CN210571818U CN 210571818 U CN210571818 U CN 210571818U CN 201920560152 U CN201920560152 U CN 201920560152U CN 210571818 U CN210571818 U CN 210571818U
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Abstract
The utility model discloses a device for measuring the volume and the volume expansion coefficient of an object, which comprises a balance with a lower lifting hook, a hanging basket, a container for containing liquid, a heater and a temperature sensor, wherein the balance is arranged above the container and is used for weighing the dry weight of the object to be measured and the weight of the object in the liquid; the hanging basket is hung at the lower part of the balance through the lower lifting hook and is used for placing an object to be measured and soaking the object in liquid. The device also comprises a microprocessor, wherein the microprocessor is connected with the electronic balance, the heater and the temperature sensor and is used for controlling the start and stop of the heater, receiving the data acquired by the electronic balance and the temperature sensor, and calculating and displaying the volume and the volume expansion coefficient of the object to be measured. The utility model discloses the realization that can be simple and convenient is especially used for the measurement of soft-packing product to its inside gas under the condition that does not destroy the packing to the survey of object volume and volume expansion coefficient, still can be used to the measurement of solid material body expansion coefficient. The device has simple structure and simple and convenient operation.
Description
Technical Field
The utility model relates to a gaseous volumetric measurement technical field especially relates to a device for being used for measuring object volume and volume expansion coefficient.
Background
At present, flexible packaging products, such as bagged food, lithium batteries and the like, are widely used in the industrial and civil fields. Due to changes in biological, chemical and physical environments, gases are generated inside flexible packaging products, and the amount of gas generation is often related to the material properties inside the flexible packaging. For example, if food inside the flexible package is spoiled, gases such as methane, carbon dioxide, etc. are generated; the electrolyte inside the soft-packed lithium battery is aged or heated to decompose, and harmful or flammable gas may be generated. Therefore, the measurement of the gas generation amount in the flexible package product is not only beneficial to the quality control of the flexible package product, but also is an important means for ensuring the product safety.
Most of the existing methods for directly measuring the content of internal gas in flexible packaging products are destructive measurement, namely, the packaging material needs to be penetrated, the internal gas is released, and then the measurement is carried out. Such destructive measurements are costly and are one-time measurements that do not allow for the observation of the change in the amount of gas inside the same flexible package product at different times and under different biological, chemical and physical conditions.
In addition, the conventional measurement of the volume expansion coefficient of a certain material is obtained from the linear expansion coefficient. Since the coefficient of linear expansion of most materials is 10-6In order to measure the linear expansion coefficient, the current method for measuring the linear expansion coefficient needs a high-precision sensor to measure the small change of the length of the material at different temperatures. The material must be placed on the base during measurement, the base can expand, and the base and the material vibrate, so that the measurement of small linear changes is very difficult, and the finally obtained volume expansion coefficient is inaccurate.
It is therefore apparent that the above-mentioned conventional methods and devices for measuring the internal gas of a flexible package product still have the inconvenience and drawbacks in structure, method and use, and further improvement is needed. How to create a new device for measuring the volume and the volume expansion coefficient of an object, which realizes the measurement of the volume and the volume expansion coefficient of the internal gas of the flexible package product and the measurement of the volume expansion coefficient of a solid material on the basis of not damaging the flexible package product, and belongs to one of the important research and development subjects at present.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a device for measuring object volume and volume expansion coefficient makes it on the basis that does not harm soft-packing product, realizes the measurement to its inside gas volume and volume expansion coefficient to overcome prior art's not enough.
In order to solve the technical problem, the utility model provides a device for measuring the volume and the volume expansion coefficient of an object, which comprises a balance with a lower lifting hook, a hanging basket, a container for containing liquid, a heater arranged at the bottom of the container and a temperature sensor arranged in the container,
the balance is arranged above the container and is used for weighing the dry weight W of the flexible package products and weighing the weight D of the flexible package products in the liquid;
the hanging basket is hung at the lower part of the balance through a lower lifting hook and is used for placing the flexible package products and soaking the flexible package products in the liquid in the container; the heater is used for heating the liquid in the container, and the temperature sensor is used for measuring the temperature value of the liquid in the container.
The flexible package product further comprises a microprocessor, the balance adopts an electronic balance, the microprocessor is connected with the electronic balance, the heater and the temperature sensor, and the microprocessor is used for controlling the start and stop of the heater, receiving the data acquired by the electronic balance and the temperature sensor, and calculating and displaying the volume and the coefficient of bulk expansion of the gas inside the flexible package product.
In a further improvement, a stirrer is further arranged in the container, and the stirrer is connected with the microprocessor and is controlled to start and stop by the microprocessor.
In a further improvement, the liquid inside the container is pure water, oil or other liquid with known density.
After adopting such design, the utility model discloses following advantage has at least:
1. the utility model discloses utilize the object under different temperatures, buoyancy in liquid is different, again through Archimedes' law conversion, the accessible measures the weight of object in liquid under the different temperatures, reaches the quantity value that calculates out this object volume, especially to the inside gaseous volumetric measurement of soft-packing product, can realize not destroying the packing of soft-packing product and just can carry out measuring purpose to its inside gas, realize the quality and the product security monitoring of effectual inspection soft-packing product. The device has simple structure and simple and convenient operation, and the method is scientific, accurate, simple and easy to implement.
2. The utility model discloses a precision electronic balance of lower band lifting hook can realize the weight measurement of the object that awaits measuring in liquid, still through microprocessor's setting, can realize intelligent data collection and automatic calculation, reaches the intelligent degree of direct display result data, and is simple and convenient, and the result is reliable.
3. The utility model discloses a to the measurement of the inside gas volume of this soft-packing product, can also be used for realizing under the dynamic condition of different temperatures, to the measurement of the inside gas volume of soft-packing product, and then realize the measurement to the inside gas expansion coefficient of this soft-packing product.
4. The utility model discloses still can be used to the device to carry out the measurement of solid material coefficient of bulk expansion, turn into the high-accuracy linear displacement measurement of prior art into the weight measurement, and the cost of weight measurement will be low many to this coefficient of bulk expansion survey method does not need the base, does not receive vibrations to influence, and the result is accurate reliable, still very big simplification the measurement process.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural diagram of the device for measuring the volume and the volume expansion coefficient of an object according to the present invention.
Detailed Description
The present embodiment takes a device for measuring the volume of gas and the volume expansion coefficient inside a flexible package product as an example, and the technical solution of the present application is described in detail. Specific examples are as follows.
Referring to fig. 1, the device for measuring the gas volume and the volume expansion coefficient inside the flexible package product of the present embodiment comprises a balance 1 with a lower hook 2, a basket 5, a container 3 for containing liquid 4, a heater 7 arranged at the bottom of the container 3 and a temperature sensor 10 arranged inside the container 3.
The balance 1 is fixedly arranged above the container 3 and can be used for weighing both the dry weight W of the flexible packaged product 6, i.e. the weight of the flexible packaged product at room temperature, and the weight D of the flexible packaged product 6 in the liquid 4.
The hanging basket 5 is hung at the lower part of the balance 1 through the lower lifting hook 2 and is used for placing the flexible package product 6 and soaking the flexible package product 6 in the liquid 4 in the container 3; the heater 7 is used for heating the liquid 4 in the container 3, and the temperature sensor 10 is used for measuring the temperature value of the liquid 4 in the container 3.
In this embodiment, pure water, oil or other liquid with a known density may be used as the liquid in the container 3. In addition, a stirrer 11 is arranged in the container 3, and the stirrer 11 can achieve the purpose of heating the liquid more uniformly.
in a more preferred embodiment, the device further comprises a microprocessor 9, the balance 1 adopts a precision electronic balance, the microprocessor 9 is connected with the electronic balance 1, the heater 7, the temperature sensor 10 and the stirrer 11 through electric wires 8, the microprocessor 9 can be used for controlling the start and stop of the heater 7 and the stirrer 11, can also be used for receiving the collected data of the electronic balance 1 and the temperature sensor 10 and calculating and displaying the volume V and the volume expansion coefficient α of the gas inside the flexible package product 6, and thus the device can realize the function of intelligently reading the volume and the volume expansion coefficient of the gas inside the flexible package product through electronic control.
The method for measuring the gas volume inside the flexible package product by using the device comprises the following steps:
(1) at a temperature T1At the same time, the balance is weighed by a balance 1The dry weight W of the flexible packaged product 6 is measured and transmitted to the microprocessor 9. The temperature T is generally adjusted1The temperature was set to room temperature.
(2) The flexible packaged product 6 is soaked in the liquid 4 at room temperature by means of a basket 5, whereupon the flexible packaged product 6 is weighed by means of a balance 11And applying the weight D1To the microprocessor 9.
(3) The microprocessor 9 controls the heater 7 and the stirrer 11 to be turned on to heat the liquid 4 to the temperature T2At this time, the flexible packaged product 6 is weighed D2And applying the weight D2To the microprocessor 9.
(4) after the microprocessor 9 receives the data collected by the balance 1 and the temperature sensor 10, the temperature of the gas in the flexible package product is calculated to be T according to the following formula1Volume of time V1:
V1＝[(W-D2)/ρ2–(W-D1)/ρ1]*T1/(T2–T1) ①
Where ρ is1Is a liquid at a temperature T1Density of time, p2Is a liquid at a temperature T2Density of the particles.
the derivation process of the formula (i) is as follows:
when the flexible packaged product 6 is placed in the liquid 4, the gas inside it follows the ideal gas law,
PV＝nRT ②
wherein P is the sum of the atmospheric pressure and the water pressure in the environment of the flexible package product 6 at the moment, and V is the internal gas volume of the flexible package product 6; n is the number of moles of gas; r is a gas constant; t is the gas temperature.
The temperature of the liquid 4 is set to T1 and T2 in this order when measured, by the ideal gas law, when the liquid temperature is T1,
PV1＝NRT1③
at the temperature of the liquid of T2,
PV2＝NRT 2④
equation (c) from equation (c) to equation (c)
V1＝T1*V2/T 2⑤
When the liquid temperature is T1Weight D of the flexible package product in the liquid1Comprises the following steps:
D1＝W-B 1⑥
wherein W is the weight of the flexible package product when no liquid is placed therein, B1Is a flexible package product with a temperature T in liquid1The buoyancy force to which it is subjected.
Also, when the liquid temperature is T2Weight D of the flexible package product in the liquid2Comprises the following steps:
D2＝W-B 2⑦
in the formula, B2Is a flexible package product with a temperature T in liquid2The buoyancy force to which it is subjected.
According to Archimedes' law, the flexible packaged product 6 has a liquid temperature T1Total volume of'1Comprises the following steps:
V’1＝B1/ρ 1⑧
V’2＝B2/ρ2⑨
in the formula, ρ1Is liquid at T1Density of time, p2Is liquid at T2Density of the particles.
When the temperature of the liquid changes, the volume changes of the solid and liquid in the flexible packaging product 6 are minimal, and the volume changes of the solid and liquid are negligible relative to the volume changes of the gas in the flexible packaging product 6. But the volume of gas in the flexible packaging product 6 will vary with temperature. Therefore:
V’1–V1＝V’2–V 2⑩
obtained from equation ⑩:
V2–V1＝V’2–V’1⑾
the formula (niner) is substituted by the formula (xi) to obtain the formula (xi):
V2–V1＝B2/ρ2–B1/ρ1⑿
substituting the formula (sixty) into equation ⑿ to obtain equation ⒀:
V2–V1＝(W-D2)/ρ2–(W-D1)/ρ1⒀
then the formula ⑤ is substituted into the formula for reference, and the internal gas volume V of the soft package product ⑤ is obtained when the temperature ⑤ is T11Comprises the following steps:
V1＝[(W-D2)/ρ2–(W-D1)/ρ1]*T1/(T2–T1) ①
then the temperature of the flexible package product is T according to the formula1Internal gas volume V of1。
When actually measured, the temperature T is measured1The gas amount in the flexible packaging product at room temperature can be obtained.
the embodiment also includes a method for measuring the gas expansion coefficient inside the flexible package product, which comprises the following steps of obtaining different volume values of the gas inside the flexible package product at different temperatures according to the method for measuring the gas volume inside the flexible package product, and then calculating the gas expansion coefficient alpha inside the flexible package product according to the following formula:
α＝(V2–V1)/(T2–T1)*1/V1⒁
wherein, V1The temperature of the internal gas of the soft package product is T1Volume of time, V2The temperature of the internal gas of the soft package product is T2Volume of time.
Of course, the above-mentioned device for measuring the volume of gas and the volume expansion coefficient inside the flexible package product can also be used for measuring the volume expansion coefficient of solid materials, such as concrete materials or steel materials, and the specific measurement method is as follows:
(1) at a temperature T1In this case, the dry weight W of the solid material to be measured is weighed by the balance 1 and transferred toIn the microprocessor 9. Again, this temperature T is generally set1The temperature was set to room temperature.
(2) Soaking the solid material to be measured in liquid 4 at room temperature via a hanging basket 5, and weighing the solid material to be measured by a balance 11And applying the weight D1To the microprocessor 9.
(3) The microprocessor 9 controls the heater 7 and the stirrer 11 to be turned on to heat the liquid 4 to the temperature T2At this time, the solid material to be measured is weighed by weight D2And applying the weight D2To the microprocessor 9.
(4) after receiving the data collected by the balance 1 and the temperature sensor 10, the microprocessor 9 calculates the coefficient of bulk expansion β of the solid material to be measured according to the following formula:
β＝[(W-D2)/ρ2–(W-D1)/ρ1]/(T2–T1)*1/[(W-D1)/ρ1]⒂
where ρ is1Is a liquid at a temperature T1Density of time, p2Is a liquid at a temperature T2Density of the particles.
the derivation process of the above equation ⒂ is:
putting the solid material to be measured into the liquid 4, and when the temperature of the liquid is T1The weight D of the solid material to be measured in the liquid1the following formula:
D1＝W-B 1⑥
also, when the liquid temperature is T2The weight D of the solid material to be measured in the liquid2the formula is as follows:
D2＝W-B 2⑦
according to Archimedes' law, the temperature of the solid material to be measured is T1Volume of (V)'1the same as the formula (b):
V’1＝B1/ρ 1⑧
the solid material to be measured has a liquid temperature T2Total volume of'2ninthly, according to the formula:
V’2＝B2/ρ2⑨
in the formula, ρ1Is liquid at T1Density of time, p2Is liquid at T2Density of the particles.
according to the formula (sixty) (+/-) the calculation formula of the body expansion coefficient beta of the solid material to be detected can be obtained:
β＝[(W-D2)/ρ2–(W-D1)/ρ1]/(T2–T1)*1/[(W-D1)/ρ1]⒂
⒂ As ⒂ can ⒂ be ⒂ seen ⒂ from ⒂ the ⒂ above ⒂ formula ⒂, ⒂ the ⒂ dry ⒂ weight ⒂ W ⒂ and ⒂ the ⒂ temperature ⒂ T ⒂ of ⒂ the ⒂ solid ⒂ material ⒂ to ⒂ be ⒂ measured ⒂ at ⒂ the ⒂ temperature ⒂ T ⒂ 1 ⒂ are ⒂ measured ⒂ by ⒂ the ⒂ above ⒂ device ⒂1Weight in liquid D1Temperature T2Weight in liquid D2And temperature T1、T2Density of liquid p1、ρ2and calculating the volume expansion coefficient β of the solid material to be measured.
The utility model is used for measure object volume and volume expansion coefficient's device simple structure, it is with low costs, the function is various, can be used for realizing the inside gaseous volume monitoring of soft-packing product, reaches the quality of inspection soft-packing product and the purpose of product security, can also be used for realizing the inside gaseous volume expansion coefficient of soft-packing product and the measured purpose of solid material volume expansion coefficient, and measurement process is simple and convenient, and measuring result is reliable.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (4)
1. A device for measuring the volume and the volume expansion coefficient of an object is characterized by comprising a balance with a lower lifting hook, a hanging basket, a container for containing liquid, a heater arranged at the bottom of the container and a temperature sensor arranged in the container,
the balance is arranged above the container and is used for weighing the dry weight W of the object to be measured and the weight D of the object to be measured in the liquid;
the hanging basket is hung at the lower part of the balance through a lower lifting hook and is used for placing the object to be detected and soaking the object to be detected in the liquid in the container; the heater is used for heating the liquid in the container, and the temperature sensor is used for measuring the temperature value of the liquid in the container.
2. The device for measuring the volume and the volume expansion coefficient of an object according to claim 1, further comprising a microprocessor, wherein the balance is a precision electronic balance, the microprocessor is connected with the electronic balance, the heater and the temperature sensor, and the microprocessor is used for controlling the start and stop of the heater, receiving the data acquired by the electronic balance and the temperature sensor, and calculating and displaying the volume and the volume expansion coefficient of the object to be measured.
3. The apparatus according to claim 2, wherein an agitator is further disposed inside the container, and the agitator is connected to the microprocessor and controlled to start and stop.
4. The apparatus for measuring the volume and the volume expansion coefficient of an object according to claim 1, wherein the liquid inside the container is pure water or oil.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932271A (en) * | 2019-04-23 | 2019-06-25 | 常州广为仪器科技有限公司 | It is a kind of for measuring the device and method of object volume and the coefficient of volume expansion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109932271A (en) * | 2019-04-23 | 2019-06-25 | 常州广为仪器科技有限公司 | It is a kind of for measuring the device and method of object volume and the coefficient of volume expansion |
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