A flexible film humidity sensor detection system

Abstract

The present invention relates to the technical field of sensor detection systems, and in particular to a flexible film humidity sensor detection system, which comprises a main body, a control system, an air supply system, and a test template. The system is used to detect the performance of a whole-plate flexible film humidity sensor during batch production. Different humidity levels can be automatically applied according to the designed humidity of the sensor, and the performance parameters of each sensor can be recorded and analyzed to determine whether the sensor is qualified. For different types of sensors, batch detection can be achieved by changing the matching test template, without adjusting the hardware, thus facilitating the detection work.

Description

Technical Field

[0001] The invention relates to the technical field of sensor detection systems, and in particular to a flexible film humidity sensor detection system. Background Art

[0002] Flexible film humidity sensor refers to a humidity sensor made of resistive nano-functional humidity-sensitive composite materials or other humidity-sensitive materials with similar functions printed on flexible and thin materials with strong adhesion, bending resistance and high sensitivity. The sensor is as thin as paper, has good flexibility and ductility, and can even be bent and folded freely. It has flexible and diverse structural forms and can be arranged arbitrarily according to the requirements of measurement conditions. It can very conveniently measure complex objects to be measured.

[0003] When in use, the humidity sensor is attached to the surface of the object to be measured. When the humidity sensor senses the external humidity, the resistance value of the sensor changes. The humidity signal generated by the sensor after sensing the change can be converted into an electrical signal output with a corresponding change intensity by using a signal conversion circuit. The performance parameters of the corresponding sensor can be obtained by analyzing the electrical signal. The working humidity range of the flexible film humidity sensor is generally -30~150 degrees Celsius. This type of sensor is commonly used in human-computer interaction equipment, intelligent robots, electronic medical devices, wearable devices, and physiological health testing equipment. With the rapid development of smart clothing and medical and elderly care industries in recent years, the demand for flexible film humidity sensors is also increasing.

[0004] Common flexible film humidity sensors are small in size, generally ranging from a few millimeters to tens of millimeters. They are manufactured in batches using a full-page printing process similar to printed circuit boards. The full-page size is generally standard, such as 300*400mm2, 400*500mm2, and there are dozens or nearly a hundred humidity sensors designed on each page. At present, when testing the performance of humidity sensors, the sensor parameters are obtained by manually heating and measuring each sensor. When the number of sensors is large, only some sensors can be selected by sampling for testing to determine the performance of the entire page of sensors. The measurement efficiency is low, and the measurement accuracy and consistency are poor. In order to meet the needs of customization, the appearance structure and interface specifications of sensors in different application fields vary greatly. When designing an automated detection system, it is necessary to simplify the measurement method as much as possible to meet the detection needs of most products as much as possible. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a flexible thin film humidity sensor detection system, which can meet the needs of full-plate batch detection and rapid conversion of sensors of different specifications, fully meeting the requirements of automated production.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A flexible film humidity sensor detection system includes a body, a control system, an air supply system, and a test template;

[0008] The body includes a base, the upper surface of the base is a planar structure, the top of the base is provided with an upper cover, the interior of the upper cover is a cavity structure, a chamber temperature sensor and a chamber humidity sensor are fixedly installed in the cavity area of ​​the upper cover, the interior of the upper cover is provided with air guide holes penetrating the upper cover from top to bottom, the air guide holes are provided on the inner side of the chamber temperature sensor and the chamber humidity sensor, and two groups of air guide holes are provided, one group is used for air intake, and the other group is used for air exhaust;

[0009] The test template is installed in the cavity structure between the upper cover and the base, the test template includes a double-layer flexible film layer, the flexible film layer includes a first flexible film layer and a second flexible film layer, the first flexible film layer is arranged at the bottom of the second flexible film layer, the first flexible film layer is a full-page flexible film material, the second flexible film layer is a flexible film material with holes, the opening of the second flexible film layer is provided with a conductive contact, the rear end of the conductive contact extends with a wire, the conductive end is connected to a wiring row, the surfaces of the first flexible film layer and the second flexible film layer are provided with through holes from top to bottom, and the through holes are arranged on both sides of the wire;

[0010] The body is connected to the air supply system;

[0011] The control system is connected with the body.

[0012] Furthermore, flexible film humidity sensors are evenly distributed on the flexible film layer, and the flexible film humidity sensors include a sensor probe and a connector, the connector is fixedly connected to the bottom side of the sensor probe, the sensor probe is made of humidity sensitive material, and the connector is correspondingly connected to the conductive contact.

[0013] Furthermore, the gas supply system includes a mixing chamber, a steam generator, a dry gas cylinder, and an electrical proportional valve. The mixing chamber is connected to the gas guide hole on the main body, and the mixing chamber is connected to the steam generator and the dry gas cylinder. The electrical proportional valve is respectively installed between the connecting pipelines between the mixing chamber and the steam generator, and between the mixing chamber and the dry gas cylinder to adjust the amount of gas from the steam generator and the dry gas cylinder entering the mixing chamber.

[0014] Furthermore, a pressing block is fixedly mounted on the rear end of the body, and the pressing block is pressed tightly against the tail end of the test template.

[0015] Furthermore, a vacuum pump is installed on the main body, adsorption holes are evenly distributed on the surface of the base, the adsorption holes correspond one-to-one with the through holes on the test template, and the pipelines of the vacuum pump are installed at the positions of the adsorption holes and the through holes.

[0016] In summary, the present invention has the following beneficial effects:

[0017] The detection system meets the requirements of whole-page batch detection and can perform performance detection on the humidity sensors on the entire flexible film at one time. The set air supply system can input hot or cold air according to the test humidity and control the humidity applied to the flexible film humidity sensor by controlling the air supply time. The control system reads the humidity signal to judge the sensor performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application, but do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of a testing system for a flexible film humidity sensor in the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the test system body in the present invention;

[0021] Figure 3 It is a schematic diagram of a briquette in the present invention;

[0022] Figure 4 It is a schematic diagram of the sensor structure in the present invention;

[0023] Figure 5 It is a schematic diagram of the full-page flexible thin film humidity sensor of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the test template in the present invention;

[0025] Figure 7 It is a schematic cross-sectional view of the test template in the present invention.

[0026] In the figure, 100, control system; 200, gas mixing chamber; 201, steam generator; 202, dry gas cylinder; 203, electric proportional valve; 300, main body; 301, base; 302, upper cover; 303, chamber temperature sensor; 304, air guide hole; 305, pressing block; 306, chamber humidity sensor; 400, flexible film humidity sensor; 401, sensor probe; 402, connector; 500, test template; 501, first flexible film layer; 502, second flexible film layer; 503, through hole; 504, terminal block; 505, wire; 506, conductive contact; 600, vacuum pump. DETAILED DESCRIPTION

[0027] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figure 1 To Attachment Figure 7 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0028] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] Example 1: Figures 1 to 7 As shown, a flexible film humidity sensor 400 detection system includes a body 300, a control system 100, an air supply system, and a test template 500. The control system 100 is connected to the body 300 to provide electrical control therefor.

[0030] The main body 300 includes a base 301, the upper surface of the base 301 is a planar structure, a top cover 302 is provided on the top of the base 301, the interior of the top cover 302 is a cavity structure, a chamber temperature sensor 303 and a chamber humidity sensor 306 are fixedly installed in the cavity area of ​​the top cover 302, which are used to test the humidity value inside the cavity, and the interior of the top cover 302 is provided with air guide holes 304 that penetrate the top cover 302 from top to bottom, and the air guide holes 304 are provided on the inner side of the chamber temperature sensor 303 and the chamber humidity sensor 306, and the air guide holes 304 are provided with two groups, one group for air intake and the other group for air exhaust.

[0031] The test template 500 is installed in the cavity structure between the upper cover 302 and the base 301. The test template 500 includes a double-layer flexible film layer, and the flexible film layer includes a first flexible film layer 501 and a second flexible film layer 502. The first flexible film layer 501 is arranged at the bottom of the second flexible film layer 502. The first flexible film layer 501 is a full-page flexible film material, and the second flexible film layer 502 is a flexible film material with holes. The two layers of film material are provided with a wire 505 and a conductive contact 506 in the middle. The opening of the second flexible film layer 502 is provided with a conductive contact 506. The conductive contact 506 extends from the rear end of the conductive contact 506. The conductive end is connected to a wiring row 504. The surfaces of the first flexible film layer 501 and the second flexible film layer 502 are provided with through holes 503 from top to bottom, and the through holes 503 are provided on both sides of the wire 505.

[0032] Flexible film humidity sensors 400 are evenly distributed on the flexible film layer. The flexible film humidity sensor 400 includes a sensor probe 401 and a connector 402. The connector 402 is fixedly connected to the bottom side of the sensor probe 401. The sensor probe 401 is made of humidity sensitive material, and the connector 402 is correspondingly connected to the conductive contact.

[0033] The gas supply system includes a mixing chamber 200, a steam generator 201, a dry gas cylinder 202, and an electrical proportional valve 203. The mixing chamber 200 is connected to the air guide hole 304 on the main body 300, and the mixing chamber 200 is connected to the steam generator 201 and the dry gas cylinder 202. The electrical proportional valve 203 is installed between the connecting pipelines of the mixing chamber 200 and the steam generator 201, and between the mixing chamber 200 and the dry gas cylinder 202. When the test humidity is set, the control system 100 controls the amount of gas from the steam generator 201 and the dry gas cylinder 202 entering the mixing chamber 200 by controlling the electrical proportional valve 203. Different proportions of cold air and hot air are mixed in the mixing chamber 200, and finally the humidity value of the circulating air entering the main body 300 is changed.

[0034] A pressing block 305 is fixedly installed at the rear end of the body 300, and the pressing block 305 is pressed against the rear end of the test template 500, and is used to press the terminal block 504 at the rear end of the test template 500 during testing, so that the signal acquisition interface of the control system 100 is in close contact with the terminal block 504 at the rear end of the test template 500. During testing, the test template 500 needs to be placed on the upper surface of the base 301.

[0035] A vacuum pump 600 is installed on the main body 300, and adsorption holes are evenly distributed on the surface of the base 301. The adsorption holes correspond one-to-one to the through holes 503 on the test template 500. The pipelines of the vacuum pump 600 are installed at the positions of the adsorption holes and the through holes 503, and are used to adsorb and fix the entire page of flexible film humidity sensors 400 when the entire page of sensors is placed on the test template 500.

[0036] In the embodiment of the present invention, during the test, the whole flexible film humidity sensor 400 is placed on the base 301, and the position of the test template 500 is conveniently aligned when it is lowered by manual alignment. After the test template 500 and the upper cover 302 are lowered, the control system 100 controls the steam generator 201 and the gas supply proportional valve on the dry gas bottle 202 to supply gas to the mixing chamber 200. The steam and dry air generate a gas with a certain humidity value in the mixing chamber 200, and then enter the cavity inside the upper cover 302 through the air guide pipe, and pass through the holes on the test template 500 and the humidity. The control system 100 obtains the temperature and humidity values ​​of the air in the cavity of the upper cover 302 by reading the temperature and humidity sensors inside the upper cover 302 in real time, and records the output signal of the sensor. After the signal acquisition is completed, the upper cover 302 is lifted up, and the entire flexible film humidity sensor 400 is manually taken out to complete the test of the entire sensor. The control system 100 simultaneously opens the exhaust valve of the mixing chamber 200 and the dry gas cylinder 202, and uses dry air to discharge the moisture in the cavity of the upper cover 302 to prepare for the next test.

[0037] After the test is completed, lift the upper cover 302, release the vacuum pump 600, take out the entire flexible film humidity sensor 400, and if you need to test sensors of different types and models, lift the pressing block 305 at the rear of the body 300, take out the test template 500, replace it with a new template, and then lower the pressing block 305 to tighten it.

[0038] It should be noted here that the flexible film humidity sensor 400 test system according to the present invention can be automatically controlled by the control system 100, such as controlling the lifting and lowering of the pressing block 305, controlling the electrical proportional valve 203 to control the steam generator 201 and the dry gas cylinder 202 to supply gas to the mixing chamber 200, and the data acquisition system to collect data, etc. This is understandable to those skilled in the art.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flexible film humidity sensor detection system, comprising a body (300), a control system (100), an air supply system, and a test template (500). Features: The body (300) comprises a base (301), the upper surface of the base (301) is a planar structure, an upper cover (302) is provided on the top of the base (301), the interior of the upper cover (302) is a cavity structure, a chamber temperature sensor (303) and a chamber humidity sensor (306) are fixedly installed in the cavity area of ​​the upper cover (302), and air guide holes (304) are provided inside the upper cover (302) and penetrate the upper cover (302) from top to bottom, the air guide holes (304) are provided on the inner sides of the chamber temperature sensor (303) and the chamber humidity sensor (306), and two groups of air guide holes (304) are provided, one group is used for air intake, and the other group is used for air exhaust; The test template (500) is installed in a cavity structure between the upper cover (302) and the base (301), the test template (500) comprises a double-layer flexible film layer, the flexible film layer comprises a first flexible film layer (501) and a second flexible film layer (502), the first flexible film layer (501) is arranged at the bottom of the second flexible film layer (502), the first flexible film layer (501) is a full-page flexible film material, the second flexible film layer (502) is a flexible film material with holes, a conductive contact (506) is arranged at the opening of the second flexible film layer (502), a wire (505) extends from the rear end of the conductive contact (506), the conductive end is connected to a wiring row (504), and the surfaces of the first flexible film layer (501) and the second flexible film layer (502) are provided with through holes (503) from top to bottom, and the through holes (503) are arranged on both sides of the wire (505); The body (300) is connected to a gas supply system; The control system (100) is connected to the body (300); A vacuum pump (600) is installed on the body (300), adsorption holes are evenly distributed on the surface of the base (301), the adsorption holes correspond one-to-one with the through holes (503) on the test template (500), and the pipelines of the vacuum pump (600) are installed at the positions of the adsorption holes and the through holes (503).

2. A flexible film humidity sensor detection system according to claim 1, Features: The flexible film layer is evenly distributed with flexible film humidity sensors (400), the flexible film humidity sensors (400) comprising a sensor probe (401) and a connector (402), the connector (402) being fixedly connected to the bottom side of the sensor probe (401), the sensor probe (401) being made of a humidity-sensitive material, and the connector (402) being correspondingly connected to a conductive contact.

3. A flexible film humidity sensor detection system according to claim 2, Features: The gas supply system comprises a gas mixing chamber (200), a steam generator (201), a dry gas cylinder (202), and an electric proportional valve (203); the gas mixing chamber (200) is connected to a gas guide hole (304) on a body (300); the gas mixing chamber (200) is connected to the steam generator (201) and the dry gas cylinder (202); and the electric proportional valve (203) is installed between connecting pipes between the gas mixing chamber (200) and the steam generator (201), and between the gas mixing chamber (200) and the dry gas cylinder (202), respectively, so as to adjust the amount of gas from the steam generator (201) and the dry gas cylinder (202) entering the gas mixing chamber (200).

Images