CN110031610B - Test device for silkworm cocoon bidirectional moisture permeability - Google Patents

Abstract

The device for testing the bidirectional moisture permeability of the cocoons comprises an inner humidity sensor, an outer humidity sensor, a temperature and humidity control box body and a water vapor generating module arranged in the temperature and humidity control box body; the water vapor generation module comprises a sealed solution container, a needle head, an air inlet pipe, an air outlet pipe and an air pump, wherein water is contained in the solution container, and the solution container is provided with an air inlet and an air outlet; one end of the air inlet pipe is connected with the air outlet of the air pump, and the other end of the air inlet pipe extends into the solution container through the air inlet to blow air to the water surface; one end of the exhaust pipe extends into the solution container through the exhaust port, the needle is sleeved on the other end of the exhaust pipe, the needle is used for being inserted into the cocoon to convey water vapor to the cocoon, the inner humidity sensor is arranged at the center of the section inside the cocoon, and the outer humidity sensor is attached to the outer surface of the cocoon. The invention utilizes water to generate steam and then introduces the steam into the cocoon, and measures the humidity of the inside and the outside of the cocoon, thereby accurately measuring the bidirectional moisture permeability of the cocoon which is a small-sized object.

Description

A testing device for bidirectional moisture permeability of silkworm cocoons

Technical Field

The invention relates to the field of detection technology, and in particular to a testing device for the bidirectional moisture permeability of silk cocoons.

Background Art

After thousands of years of evolution, a unique multi-scale and multi-morphological structure has been formed inside the cocoon to protect the silkworm pupa from extreme cold and heat without hindering the oxygen exchange between the silkworm pupa and the outside environment, as well as the permeability of water vapor and carbon dioxide. It is a very important topic to establish the relationship between the internal structure of the cocoon and its physical transfer properties such as thermal properties and permeability, and to reveal key structural parameters to guide the design of bionic textiles. Acquiring the physical transfer properties of the cocoon through experimental testing is a necessary means of research.

However, due to the small size and irregular shape of silk cocoons, it is difficult to measure the physical transfer properties of silk cocoons using conventional devices. At present, there is an existing technology for testing the thermal insulation performance of silk cocoons. A Chinese patent (publication number CN205958131 U) discloses a device for measuring the temperature change inside a silk cocoon, which includes a temperature chamber, a data acquisition unit for monitoring the temperature inside the silk cocoon, and a data storage device connected to the data acquisition unit through a communication interface; a group of wires are led out of the silk cocoon, and a group of wires are connected to form a closed loop, and an internal node is formed inside the silk cocoon, and an external node is formed outside the temperature chamber, and a current transformer is arranged on the wire. The temperature of the internal node of the silk cocoon changes accordingly with the temperature of the temperature chamber, and the temperature of the external node is the ambient temperature. When there is a temperature difference between the internal node and the external node, a current will be formed. The current change detected by the current transformer is fed back to the temperature change inside the silk cocoon, so as to realize the real-time monitoring of the temperature inside the silk cocoon, accurately detect the temperature change inside the silk cocoon, and express the thermal insulation performance of the silk cocoon by the temperature difference.

However, there is no testing device for the moisture permeability of silkworm cocoons. The silkworm cocoon is an irregular ellipsoid, and its moisture permeability is not only related to the shell material but also to the air layer inside the shell and the overall shape. In addition, moisture vapor transmission is also directional. At present, there is no testing device for the overall bidirectional moisture permeability of silkworm cocoons.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and provide a testing device for the bidirectional moisture permeability of silk cocoons, which can accurately measure the bidirectional moisture permeability of small-sized objects such as silk cocoons. The test is fast, the structure is simple, the test is convenient, and batch testing can be carried out.

To achieve the above purpose, the technical solution adopted by the present invention is as follows:

A testing device for the bidirectional moisture permeability of a silk cocoon comprises an inner humidity sensor, an outer humidity sensor, a temperature and humidity control box, and a water vapor generating module arranged in the temperature and humidity control box; the water vapor generating module comprises a sealed solution container, a needle, an air inlet pipe, an exhaust pipe, and an air pump, the solution container contains water, and the solution container is provided with an air inlet and an exhaust port; one end of the air inlet pipe is connected to the air outlet of the exhaust pump, and the other end of the air inlet pipe extends into the solution container through the air inlet to blow air toward the water surface; one end of the exhaust pipe extends into the solution container through the exhaust port, and the needle is sleeved on the other end of the exhaust pipe, and the needle is used to be inserted into the silk cocoon to transport water vapor to the silk cocoon, the inner humidity sensor is arranged at the center of the cross section inside the silk cocoon, and the outer humidity sensor is attached to the outer surface of the silk cocoon.

As can be seen from the above, when used, the specific process of the present invention for testing the moisture permeability of the cocoon from the outside to the inside is as follows: 1. Take the cocoon and make a small incision at the port of the cocoon, insert the inner humidity sensor through the incision, the end of the inner humidity sensor is at the center of the cross section inside the cocoon, that is, at the intersection of the short axis and the long axis of the cocoon, the cross section of the cocoon is generally elliptical, and the incision is sealed with tape, the outer humidity sensor placed outside the cocoon is attached to the surface of the cocoon, and the outer humidity sensor and the inner humidity sensor are in the same cross section; 2. Set the temperature of the temperature and humidity control box to 21±0.3°C and the relative humidity to 50±3%RH; 3. Insert the needle into the cocoon; 4. Start the vacuum pump, and the gas generated by the vacuum pump is blown onto the water surface in the solution container through the air inlet pipe, and water vapor is generated on the water surface. Due to the effect of the difference in moisture concentration, the water vapor is output from the exhaust pipe and passed into the cocoon through the needle connected to the end of the exhaust pipe; 5. The humidity sensors placed inside and outside the cocoon record the change of the relative humidity of the cocoon over time, and the difference in humidity concentration inside and outside the cocoon can evaluate the moisture permeability of the cocoon.

In summary, the present invention utilizes water to generate steam and then introduces water vapor into the inside of the cocoon, and measures the humidity inside and outside the cocoon, so as to accurately measure the two-way moisture permeability of a small-sized object such as a cocoon. The test is fast, the structure is simple, the test is convenient, and batch testing can be carried out.

As an improvement of the present invention, it includes an alarm module, which includes an infrared distance detector, a driving circuit board and a buzzer. The infrared distance detector is arranged above the water surface in the solution container and is used to detect the height of the water surface. The infrared distance detector is electrically connected to the input end of the driving circuit board, and the buzzer is electrically connected to the output end of the driving circuit board.

As an improvement of the present invention, the diameter of the needle is 0.2-0.4 mm.

As an improvement of the present invention, the solution container is a transparent glass container.

As an improvement of the present invention, the volume of the solution container is 200-500 ml, wherein the height of the solution container is in the range of 10-20 cm, and the height of the aqueous solution is in the range of 5-10 cm.

As an improvement of the present invention, the distance between the end face of the other end of the air inlet pipe and the water surface is 1 to 3 cm, and the distance between the end face of one end of the exhaust pipe and the water surface is 1 to 3 cm.

Furthermore, the vacuum pump is a miniature vacuum pump.

Furthermore, the air intake pipe and the exhaust pipe are rubber hoses.

Compared with the prior art, the present invention has the following advantages:

The present invention utilizes water to generate steam and then introduces the steam into the inside of the cocoon, and measures the humidity inside and outside the cocoon, so as to accurately measure the two-way moisture permeability of a small-sized object such as a cocoon. The test is fast, the structure is simple, the test is convenient, and batch testing can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a testing device for bidirectional moisture permeability of silkworm cocoons according to the present invention;

FIG2 is a diagram showing the change in humidity inside and outside the cocoon measured by the present invention;

Figure 3 shows the change in humidity difference between the inside and outside of the cocoon.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Example

Please refer to FIG1 , a testing device for the bidirectional moisture permeability of a silkworm cocoon includes an inner humidity sensor 30 , an outer humidity sensor 40 , a temperature and humidity control box 10 , and a water vapor generating module disposed in the temperature and humidity control box 10 ;

The water vapor generation module includes a sealed solution container 50, a needle 52, an air inlet pipe 21, an air outlet pipe 51 and an air pump 20. The solution container 50 contains water and is provided with an air inlet and an air outlet.

One end of the air inlet pipe 21 is connected to the air outlet of the air pump 20, and the other end of the air inlet pipe 21 extends into the solution container 50 through the air inlet to blow air toward the water surface;

One end of the exhaust pipe 51 extends into the solution container 50 through the exhaust port, and the needle 52 is sleeved on the other end of the exhaust pipe 51. The needle 52 is used to be inserted into the cocoon 90 to transport water vapor to the cocoon 90. The internal humidity sensor 30 is arranged at the center of the cross section inside the cocoon 90, and the external humidity sensor 40 is attached to the outer surface of the cocoon 90.

As can be seen from the above, when used, the specific process of the present invention for testing the moisture permeability of the cocoon from the outside to the inside is as follows: 1. Take the cocoon and make a small incision at the port of the cocoon, insert the inner humidity sensor through the incision, the end of the inner humidity sensor is at the center of the cross section inside the cocoon, that is, at the intersection of the short axis and the long axis of the cocoon, the cross section of the cocoon is generally elliptical, and the incision is sealed with tape, the outer humidity sensor placed outside the cocoon is attached to the surface of the cocoon, and the outer humidity sensor and the inner humidity sensor are in the same cross section; 2. Set the temperature of the temperature and humidity control box to 21±0.3°C and the relative humidity to 50±3%RH; 3. Insert the needle into the cocoon; 4. Start the vacuum pump, and the gas generated by the vacuum pump is blown onto the water surface in the solution container through the air inlet pipe, and water vapor is generated on the water surface. Due to the effect of the difference in moisture concentration, the water vapor is output from the exhaust pipe and passed into the cocoon through the needle connected to the end of the exhaust pipe; 5. The humidity sensors placed inside and outside the cocoon record the change of the relative humidity of the cocoon over time, and the difference in humidity concentration inside and outside the cocoon can evaluate the moisture permeability of the cocoon.

In summary, the present invention utilizes water to generate steam and then introduces water vapor into the inside of the cocoon, and measures the humidity inside and outside the cocoon, so as to accurately measure the two-way moisture permeability of a small-sized object such as a cocoon. The test is fast, the structure is simple, the test is convenient, and batch testing can be carried out.

Please refer to Figures 2 and 3. Figure 2 is a diagram showing the change of humidity inside and outside the cocoon when the present invention is used to measure the humidity inside and outside the cocoon, and Figure 3 is a diagram showing the change of the humidity difference inside and outside the cocoon. By using humidity sensors inside and outside the cocoon to record the change of relative humidity of the cocoon over time, the difference in humidity concentration inside and outside the cocoon can be used to evaluate the moisture permeability of the cocoon.

In this embodiment, the test device includes an alarm module, which includes an infrared distance detector 70, a driving circuit board 60 and a buzzer 80. The infrared distance detector 70 is arranged above the water surface in the solution container 50 and is used to detect the height of the water surface. The infrared distance detector 70 is electrically connected to the input end of the driving circuit board 60, and the buzzer 80 is electrically connected to the output end of the driving circuit board 60. If the change in the distance from the infrared distance detector to the water surface exceeds 0.5 cm, an electrical signal will be sent to the driving circuit board, and the driving circuit board will power on the buzzer and emit an alarm sound to decide whether to add aqueous solution.

In this embodiment, the diameter of the needle 52 is 0.2-0.4 mm.

In this embodiment, the solution container 50 is a transparent glass container. The container is transparent glass, which is convenient for observing the water surface in the container.

In this embodiment, the volume of the solution container 50 is 200-500 ml, wherein the height of the solution container 50 is in the range of 10-20 cm, and the height of the aqueous solution is in the range of 5-10 cm.

In this embodiment, the distance between the other end face of the air inlet pipe 21 and the water surface is 1 to 3 cm, and the distance between the end face of one end of the exhaust pipe 51 and the water surface is 1 to 3 cm. Maintaining a suitable distance between the end faces of the air inlet pipe and the exhaust pipe and the water surface can ensure that water vapor is generated by blowing gas to the water surface, and at the same time, it can prevent the moisture entering the cocoon from being disturbed by the air flow of the air pump.

In this embodiment, the air pump 20 is a micro vacuum pump. In this embodiment, the air inlet pipe and the air outlet pipe are rubber hoses.

The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims (5)

1. A testing device for the bidirectional moisture permeability of a silk cocoon, characterized in that it comprises an inner humidity sensor, an outer humidity sensor, a temperature and humidity control box, and a water vapor generation module arranged in the temperature and humidity control box; the water vapor generation module comprises a sealed solution container, a needle, an air inlet pipe, an exhaust pipe, and an air pump, the solution container contains water, and the solution container is provided with an air inlet and an exhaust port; one end of the air inlet pipe is connected to the air outlet of the exhaust pump, and the other end of the air inlet pipe extends into the solution container through the air inlet to blow air toward the water surface; one end of the exhaust pipe extends into the solution container through the exhaust port, and the needle is sleeved on the other end of the exhaust pipe, and the needle is used to be inserted into the silk cocoon to transport water vapor to the silk cocoon, the inner humidity sensor is arranged at the center of the cross section inside the silk cocoon, and the outer humidity sensor is attached to the outer surface of the silk cocoon; The diameter of the needle is 0.2-0.4 mm; the volume of the solution container is 200-500 ml, wherein the height of the solution container is 10-20 cm, and the height of the aqueous solution is 5-10 cm; the distance between the other end of the inlet pipe and the water surface is 1-3 cm, and the distance between the end of one end of the exhaust pipe and the water surface is 1-3 cm; When the test device is used: (1) Take a silk cocoon and make a small incision at the end of the cocoon. Insert the inner humidity sensor through the incision. The end of the inner humidity sensor is at the center of the cross section inside the cocoon, that is, the intersection of the short axis and the long axis of the cocoon. The cross section of the cocoon is generally elliptical. Seal the incision with tape. The outer humidity sensor placed outside the cocoon is attached to the surface of the cocoon. The outer humidity sensor and the inner humidity sensor are in the same cross section. (2) Set the temperature of the temperature and humidity control box to 21±0.3℃ and the relative humidity to 50±3%RH; (3) Insert the needle into the cocoon; (4) Starting the vacuum pump, the gas generated by the vacuum pump is blown toward the water surface in the solution container through the air inlet pipe, and water vapor is generated on the water surface. Due to the difference in moisture concentration, the water vapor is output through the exhaust pipe and enters the cocoon through the needle connected to the end of the exhaust pipe; (5) Humidity sensors placed inside and outside the cocoon record the change in relative humidity of the cocoon over time. The difference in humidity concentration inside and outside the cocoon can be used to evaluate the moisture permeability of the cocoon. 2. The testing device for the bidirectional moisture permeability of silkworm cocoons according to claim 1 is characterized in that it includes an alarm module, which includes an infrared distance detector, a driving circuit board and a buzzer. The infrared distance detector is arranged above the water surface in the solution container and is used to detect the height of the water surface. The infrared distance detector is electrically connected to the input end of the driving circuit board, and the buzzer is electrically connected to the output end of the driving circuit board. 3. The testing device for the bidirectional moisture permeability of silkworm cocoons according to claim 1, wherein the solution container is a transparent glass container. 4. The testing device for the bidirectional moisture permeability of silkworm cocoons according to claim 1, characterized in that the vacuum pump is a micro vacuum pump. 5. The testing device for the bidirectional moisture permeability of silkworm cocoons according to claim 1, characterized in that the air inlet pipe and the exhaust pipe are rubber hoses.