阅读说明：本技术 一种气密性自动检测系统及其检测方法 (Automatic air tightness detection system and detection method thereof ) 是由 李庆明 凌秀才 黄文贤 于 2021-08-09 设计创作，主要内容包括：本发明公开一种气密性自动检测系统及其检测方法,将需要检测气密性的被测物放置在密封检测箱中,将被测物与检测头连接,终端服务器根据被测物的类型设置压力值和释放时间并打开气体压力调节阀,气体释放源通过通气管向压力仓释放气体,被测物与压力仓连通,压力检测模块检测压力仓中气体的压力信息、气流检测模块检测密封检测箱中的气体流动信息、声音采集模块采集密封检测箱中的声音信息、声音处理模块接收处理分析声音采集模块的声音信息和判断模块配合工作,进行检测,解决了现有的气密性检测法检测被测物时依赖于人为判断,且单单依靠差压传感器上产生的微小差压判断工件是否泄漏,容易影响被测物气密性检测的准确性的技术问题。(The invention discloses an automatic detection system and a detection method for air tightness, a detected object needing to detect the air tightness is placed in a sealed detection box and is connected with a detection head, a terminal server sets a pressure value and release time according to the type of the detected object and opens a gas pressure regulating valve, a gas release source releases gas to a pressure bin through a vent pipe, the detected object is communicated with the pressure bin, a pressure detection module detects the pressure information of the gas in the pressure bin, an airflow detection module detects the gas flow information in the sealed detection box, a sound acquisition module acquires the sound information in the sealed detection box, a sound processing module receives, processes and analyzes the sound information of the sound acquisition module and a judgment module work cooperatively, the detection is carried out, the problem that the existing air tightness detection method depends on manual judgment when detecting the detected object and only depends on micro differential pressure generated on a differential pressure sensor to judge whether a workpiece is leaked or not is solved, easily influence the accuracy of the air tightness detection of the detected object.)

1. An automatic airtightness detection system, comprising: the device comprises a gas release source, a vent pipe, a gas pressure regulating valve, a terminal server, a sealing detection box, a detection pipe, a pressure bin, a pressure detection module, an airflow detection module, a sound collection module, a sound processing module and a judgment module;

the gas release source is connected with the pressure bin through the vent pipe; the gas pressure regulating valve is arranged on the vent pipe; the terminal server is electrically connected with the gas pressure regulating valve;

one end of the detection pipe is communicated with the pressure bin, the other end of the detection pipe is communicated with the sealed detection box, and a detection head is arranged at the end part of the detection pipe;

the pressure detection module is arranged in the pressure bin and used for detecting the pressure information of the gas in the pressure bin and generating pressure data;

the gas flow detection module is arranged in the sealed detection box and used for detecting gas flow information in the sealed detection box and generating gas flow data;

the sound acquisition module is arranged in the sealed detection box and used for acquiring sound information in the sealed detection box and sending the sound information to the sound processing module;

the sound processing module is used for recording sound information and various noises of a tested object with qualified air tightness during testing in advance, receiving the sound information of the sound acquisition module, analyzing and processing the sound information and generating sound data, wherein the sound data comprises: a sound type and a sound orientation, the sound type comprising: sound information and various noises of the tested object with qualified air tightness during testing;

the judging module is used for receiving the detection data of the pressure detection module, the airflow detection module and the sound processing module, judging whether the detected object leaks or not and sending the judgment result to the terminal server;

and the terminal server is used for managing the gas pressure regulating valve and the judging module.

2. The automatic airtightness detection system according to claim 1, wherein the detection head is connected to the open end of the object to be detected in a sealing manner, and the gas in the gas release source is a trace gas.

3. The automatic airtightness detection system according to claim 2, further comprising: the device comprises a gas acquisition module, a gas processing module and a concentration detection module;

the gas acquisition module is arranged in the sealed detection box and used for acquiring gas information in the sealed detection box and sending the gas information to the gas processing module, wherein the gas information is a gas component detected in the sealed detection box;

the gas processing module is configured to receive the gas information of the gas acquisition module, perform analysis processing, and generate gas data, where the gas data includes: a gas type, the gas type comprising: tracer gases or gases commonly found in air;

the concentration detection module is arranged in the sealed detection box, and selects a corresponding gas concentration sensor to detect the gas concentration according to the gas data and generate gas concentration data.

4. The automatic airtightness detection system according to claim 3, further comprising: a display module;

the display module is arranged on the sealing detection box and used for displaying the gas data and the gas concentration data.

5. The automatic airtightness detection system according to claim 1, wherein the airtight detection box comprises: the box body is hinged with the box door.

6. The automatic air tightness detection system according to claim 5, wherein a sealing strip is arranged at a contact portion between the inner surface of the box door and the box body, and a sealing structure in the sealing detection box is formed by pressing the sealing strip after the box door is closed.

7. The automatic airtightness detection system according to claim 1, further comprising: the gas collecting device, the gas collecting pipe and the valve;

the valve is arranged on the gas collecting pipe;

the gas collecting device is connected with the sealing detection box through the gas collecting pipe.

8. An automatic detection method for air tightness is characterized by comprising the following steps:

putting the measured object into a sealed detection box;

the terminal server sets a pressure value and release time, opens the gas pressure regulating valve, and releases gas to the pressure bin through the vent pipe by the gas release source;

after gas flows into the sealed detection box from the pressure bin through the detection pipe, the pressure detection module, the airflow detection module, the sound collection module, the sound processing module and the judgment module start to work to send collected detection data to the judgment module, the judgment module compares the received detection data with detection data of a detected object with qualified air tightness to judge whether the air tightness of the detected object is qualified or not, and sends a judgment result to the terminal server.

9. The automatic airtightness detection method according to claim 8, wherein:

placing the object to be detected into a sealed detection box, and hermetically connecting the open end of the object to be detected with a detection head;

the terminal server sets a pressure value and release time, opens the gas pressure regulating valve, and the gas release source releases the tracer gas to the pressure bin through the vent pipe;

after tracer gas fills the measured object from the pressure chamber through the detection head on the detecting tube, pressure detection module, air current detection module, sound collection module, sound processing module, gas collection module, gas processing module, concentration detection module and judgment module begin work and send the detection data of gathering to judgment module, and judgment module judges whether the gas tightness of measured object is qualified after comparing the detection data received with the detection data of the measured object that the gas tightness is qualified, and sends the judged result to terminal server.

Technical Field

The invention relates to the technical field of measurement and detection, in particular to an automatic air tightness detection system and a detection method thereof.

Background

The air tightness detection is applied to strict integrity evaluation of the interior of a detected object, and mainly comprises the following steps of detecting whether leakage occurs at each connecting part of the detected object, wherein the traditional detection method for detecting the air tightness comprises the following steps: introducing gas with certain pressure into the sealed workpiece cavity, introducing gas with the same pressure into a standard tank body, standing for a period of time, and observing the pressure in the standard tank body and the workpiece to generate micro differential pressure on the differential pressure sensor due to leakage. The leak detector quantitatively calculates the amount of leakage of the object to be measured based on the output change of the differential pressure sensor, but it is difficult to determine whether the workpiece is caused by leakage due to a minute differential pressure generated on the differential pressure sensor, so that the workpiece can be immersed in water or other liquid to observe whether bubbles leak out. Or soapy water is coated on the surface of the workpiece, and whether bubbles are generated or not is observed. However, the method has low testing efficiency, the leakage testing effect is greatly influenced by human factors, the data cannot be quantized without accuracy, and the tracking and reason judgment are inconvenient. The secondary pollution to the tested object needs to be dried and wiped.

The existing air tightness detection method relies on manual judgment when detecting a detected object, and only relies on a small differential pressure generated on a differential pressure sensor to judge whether a workpiece leaks, so that the accuracy of the air tightness detection of the detected object is easily influenced.

Disclosure of Invention

The embodiment of the invention provides an automatic air tightness detection system and an automatic air tightness detection method, which are used for solving the technical problems that when an existing air tightness detection method is used for detecting a detected object, manual judgment is relied on, and whether a workpiece leaks or not is judged by means of a small differential pressure generated on a differential pressure sensor, so that the accuracy of air tightness detection of the detected object is easily influenced.

In view of the above, the first aspect of the present invention provides an automatic air-tightness detecting system, including: the device comprises a gas release source, a vent pipe, a gas pressure regulating valve, a terminal server, a sealing detection box, a detection pipe, a pressure bin, a pressure detection module, an airflow detection module, a sound collection module, a sound processing module and a judgment module;

the gas release source is connected with the pressure bin through the vent pipe; the gas pressure regulating valve is arranged on the vent pipe; the terminal server is electrically connected with the gas pressure regulating valve;

one end of the detection pipe is communicated with the pressure bin, the other end of the detection pipe is communicated with the sealed detection box, and a detection head is arranged at the end part of the detection pipe;

the pressure detection module is arranged in the pressure bin and used for detecting the pressure information of the gas in the pressure bin and generating pressure data;

the gas flow detection module is arranged in the sealed detection box and used for detecting gas flow information in the sealed detection box and generating gas flow data;

the sound acquisition module is arranged in the sealed detection box and used for acquiring sound information in the sealed detection box and sending the sound information to the sound processing module;

the sound processing module is used for recording sound information and various noises of a tested object with qualified air tightness during testing in advance, receiving the sound information of the sound acquisition module, analyzing and processing the sound information and generating sound data, wherein the sound data comprises: a sound type and a sound orientation, the sound type comprising: sound information and various noises of the tested object with qualified air tightness during testing;

the judging module is used for receiving the detection data of the pressure detection module, the airflow detection module and the sound processing module, judging whether the detected object leaks or not and sending the judgment result to the terminal server;

and the terminal server is used for managing the gas pressure regulating valve and the judging module.

Optionally, the detection head is connected with an open end of the object to be detected in a sealing manner, and the gas in the gas release source is a tracer gas.

Optionally, the method further comprises: the device comprises a gas acquisition module, a gas processing module and a concentration detection module;

the gas acquisition module is arranged in the sealed detection box and used for acquiring gas information in the sealed detection box and sending the gas information to the gas processing module, wherein the gas information is a gas component detected in the sealed detection box;

the gas processing module is configured to receive the gas information of the gas acquisition module, perform analysis processing, and generate gas data, where the gas data includes: a gas type, the gas type comprising: tracer gases or gases commonly found in air;

the concentration detection module is arranged in the sealed detection box, and selects a corresponding gas concentration sensor to detect the gas concentration according to the gas data and generate gas concentration data.

Optionally, the method further comprises: a display module;

the display module is arranged on the sealing detection box and used for displaying the gas data and the gas concentration data.

Optionally, the seal detection box comprises: the box body is hinged with the box door.

Optionally, a sealing strip is arranged at a contact position between the inner surface of the box door and the box body, and the sealing structure in the sealing detection box is formed by pressing the sealing strip after the box door is closed.

Optionally, the method further comprises: the gas collecting device, the gas collecting pipe and the valve;

the valve is arranged on the gas collecting pipe;

the gas collecting device is connected with the sealing detection box through the gas collecting pipe.

The second aspect of the invention provides an automatic detection method for air tightness, which comprises the following steps:

putting the measured object into a sealed detection box;

the terminal server sets a pressure value and release time, opens the gas pressure regulating valve, and releases gas to the pressure bin through the vent pipe by the gas release source;

after gas flows into the sealed detection box from the pressure bin through the detection pipe, the pressure detection module, the airflow detection module, the sound collection module, the sound processing module and the judgment module start to work to send collected detection data to the judgment module, the judgment module compares the received detection data with detection data of a detected object with qualified air tightness to judge whether the air tightness of the detected object is qualified or not, and sends a judgment result to the terminal server.

Optionally, putting the object to be detected into a sealed detection box, and hermetically connecting the open end of the object to be detected with the detection head;

the terminal server sets a pressure value and release time, opens the gas pressure regulating valve, and the gas release source releases the tracer gas to the pressure bin through the vent pipe;

after tracer gas is filled into a measured object from a pressure bin through a detection head on a detection tube, the pressure detection module, the airflow detection module, the sound collection module, the sound processing module, the gas collection module, the gas processing module, the concentration detection module and the judgment module start to work to send collected detection data to the judgment module, the judgment module compares the received detection data with detection data of the measured object with qualified air tightness to judge whether the air tightness of the measured object is qualified or not, and sends a judgment result to a terminal server

According to the technical scheme, the embodiment of the invention has the following advantages:

the invention provides an automatic air tightness detection system, which is characterized in that a measured object needing to detect air tightness is placed in a sealed detection box and is connected with a detection head of a detection tube, a terminal server sets a pressure value and a release time according to the type of the measured object and opens a gas pressure regulating valve, a gas release source releases gas to a pressure bin through a vent tube, after the measured object is communicated with the pressure bin, a pressure detection module, an airflow detection module, a sound acquisition module, a sound processing module and a judgment module work cooperatively to detect the air tightness of the measured object, so that the air tightness detection does not depend on manual judgment, the accuracy of the air tightness detection of the measured object is effectively improved, the problem that the existing air tightness detection method depends on manual judgment when the measured object is detected is solved, and whether a workpiece leaks or not is judged by only depending on micro differential pressure generated on a differential pressure sensor, easily influence the accuracy of the air tightness detection of the detected object.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings according to these drawings.

Fig. 1 is a schematic structural diagram of an automatic airtightness detection system according to an embodiment of the present invention;

FIG. 2 is a block diagram of an automatic airtightness detection system according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of an automatic airtightness detection method according to an embodiment of the present invention;

wherein the reference numerals are:

1. a gas release source; 2. a breather pipe; 3. a gas pressure regulating valve; 4. a terminal server; 5. sealing the detection box; 5-1, a box body; 5-2, a box door; 6. a pressure bin; 7. a gas collection device; 8. a gas collecting pipe; 9. a valve; 10. and (6) detecting the tube.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

For easy understanding, referring to fig. 1 and 2, a first aspect of the present invention provides an embodiment of an automatic airtightness detection system, including: the device comprises a gas release source 1, a vent pipe 2, a gas pressure regulating valve 3, a terminal server 4, a sealing detection box 5, a detection pipe 10, a pressure bin 6, a pressure detection module, an airflow detection module, a sound collection module, a sound processing module and a judgment module;

the gas release source 1 is connected with the pressure bin 6 through the vent pipe 2; the gas pressure regulating valve 3 is arranged on the breather pipe 2; the terminal server 4 is electrically connected with the gas pressure regulating valve 3;

one end of the detection tube 10 is communicated with the pressure bin 6, the other end of the detection tube 10 is communicated with the sealed detection box 5, and a detection head is arranged at the end part of the detection tube;

the pressure detection module is arranged in the pressure bin 6 and used for detecting the pressure information of the gas in the pressure bin 6 and generating pressure data;

the gas flow detection module is arranged in the sealed detection box 5 and is used for detecting gas flow information in the sealed detection box 5 and generating gas flow data;

the sound acquisition module is arranged in the sealed detection box 5 and used for acquiring sound information in the sealed detection box 5 and sending the sound information to the sound processing module;

the sound processing module is used for recording sound information and various noises of a measured object with qualified air tightness during testing in advance, analyzing and processing the sound information of the sound acquisition module and generating sound data, wherein the sound data comprises: a sound type and a sound orientation, the sound type comprising: sound information and various noises of the tested object with qualified air tightness during testing;

the judging module is used for receiving the detection data of the pressure detection module, the airflow detection module and the sound processing module, judging whether the detected object leaks or not and sending the judgment result to the terminal server 4;

and the terminal server 4 is used for managing the gas pressure regulating valve 3 and the judging module.

It should be noted that, the measured object to be detected is placed in the sealed detection box 5, the measured object is connected with the detection head of the detection tube 10, one end of the detection tube 10 is communicated with the pressure chamber 6, the detection head at the other end of the detection tube 10 is communicated with the sealed detection box 5, the detection head is located inside the sealed detection box 5, the gas pressure regulating valve 3 is arranged on the vent pipe 2, the terminal server 4 is electrically connected with the gas pressure regulating valve 3, the gas release source 1 releases gas to the pressure chamber 6 through the vent pipe 2, and the terminal server 4 sets a pressure value and release time by controlling the opening and closing of the gas pressure regulating valve 3. When the air tightness of the measured object starts to be detected, a pressure detection module arranged in the pressure bin 6 detects the pressure information of the gas in the pressure bin 6, generates pressure data and sends the pressure data to a judgment module; the gas flow detection module arranged in the sealed detection box 5 detects gas flow information in the sealed detection box 5 and generates gas flow data, and then the gas flow data is sent to the judgment module; the sound collection module that sets up in sealed detection case 5 gathers the sound information in sealed detection case 5 to with sound information transmission to sound processing module, sound processing module receives sound information of sound collection module and carries out analysis processes and generate sound data, sound data include: the type of sound and the bearing of the sound, and then sends the sound data to the determination module.

The sound types include: sound information and various noises of the tested object with qualified air tightness during testing;

if the tested object is detected to be unqualified in air tightness, people can determine the leakage place of the tested object through the generated sound direction, so that the people can conveniently maintain and reduce loss.

The sound information and various noises of the tested object with qualified air tightness during testing are recorded into the sound processing module in advance, the decibel of the tested object with qualified air tightness is low, a threshold value is set according to the sound information of the tested object with qualified air tightness, the sound acquisition module sends the sound information detected in the sealing detection box 5 to the sound processing module, the sound processing module compares the received sound information with the sound information and various noises of the tested object with qualified air tightness during testing, the influence of various noises is eliminated, the sound information of the tested object with qualified air tightness during testing is left, when the sound information of the tested object is larger than the threshold value, the tested object is proved to have a leak point, and otherwise, the tested object is qualified. And generating sound data according to the comparison result.

The judgment module receives detection data of the pressure detection module, the airflow detection module and the sound processing module, and when the following three conditions are met simultaneously: the pressure detection module detects that the data display pressure value does not change, the air flow data display of the air flow detection module does not have gas flowing in the sealed detection box 5, when the sound data display of the sound processing module is not the sound of air flow leakage, the judgment module judges that the detected object does not leak, the air tightness of the detected object does not depend on artificial judgment, the air tightness of the detected object is detected in a closed space, when three conditions are achieved simultaneously, the air tightness of the detected object is good, and the accuracy of detecting the air tightness of the detected object is effectively improved.

The terminal server 4 is used for controlling the on-off of the gas pressure regulating valve 3 and displaying pressure data, gas flow data, sound data and judgment results to people.

The invention provides an automatic air tightness detection system, a measured object needing to detect air tightness is placed in a sealed detection box 5 and is connected with a detection head of a detection pipe 10, a terminal server 4 sets a pressure value and a release time according to the type of the measured object and opens a gas pressure regulating valve 3, a gas release source 1 releases gas to a pressure bin 6 through a vent pipe 2, after the measured object is communicated with the pressure bin 6, a pressure detection module, an airflow detection module, a sound collection module, a sound processing module and a judgment module work cooperatively to detect the air tightness of the measured object, the air tightness detection is independent of manual judgment, the accuracy of the air tightness detection of the measured object is effectively improved, the problem that the existing air tightness detection method depends on manual judgment when the measured object is detected and whether a workpiece leaks or not is judged by only depending on micro differential pressure generated on a differential pressure sensor is solved, easily influence the accuracy of the air tightness detection of the detected object.

Example 2

For easy understanding, please refer to fig. 1 and fig. 2, as a further modification of embodiment 1, the detecting head is connected with the open end of the object to be detected in a sealing manner, and the gas in the gas releasing source 1 is a tracer gas;

further comprising: the device comprises a gas acquisition module, a gas processing module and a concentration detection module;

the gas collecting module is arranged in the sealed detection box 5 and used for collecting gas information in the sealed detection box 5 and sending the gas information to the gas processing module, and the gas information is a gas component detected in the sealed detection box 5;

the gas processing module is used for receiving the gas information of the gas acquisition module, analyzing and processing the gas information and generating gas data, wherein the gas data comprises: a gas type, the gas type comprising: tracer gases or gases commonly found in air;

the concentration detection module is arranged in the sealed detection box 5, and selects a corresponding gas concentration sensor according to the gas data to detect the gas concentration and generate gas concentration data;

further comprising: a display module; and the display module is arranged on the sealed detection box 5 and used for displaying gas data and gas concentration data.

It should be noted that, the gas in the gas release source 1 is the tracer gas, and if there is leakage in the object to be detected, people can obtain the sound direction according to the sound data, and then quickly and accurately find the leakage point of the object to be detected according to the tracer gas, so that people can maintain and repair the object to be detected.

The display module is also used for managing the gas treatment module and the concentration detection module.

When detecting, there is the leakage when the testee, the gaseous gas information of the gas that leaks out is then gathered to the gas acquisition module that sets up in sealed detection case 5, gas information is the gas composition that detects in the sealed detection case 5, and send gas information to gas processing module, in advance to the gas composition and the common gas composition in the air of all kinds of tracer gases of gas processing module types, gas processing module compares received gas information and the gas composition and the common gas in the air of all kinds of tracer gases of type in advance, generate gas data, gas data is gas type, gas type includes: trace gases or gases commonly found in air.

Be provided with in the sealed detection case 5 with the tracer gas assorted gas concentration sensor in the gas release source 1, gas concentration sensor work, detect the gas concentration in the sealed detection case 5, when detecting out that the tracer gas who corresponds with the gas release source 1 in the sealed detection case 5 is rising constantly, and show gas data and gas concentration data through the display module that sets up on sealed detection case 5, then can judge that the measured object has the leakage or the gas pressure regulating valve 3 is not closed and leads to gas leakage, also probably sealed automatic check out system has the problem, be convenient for people in time discover the maintenance, reduce the loss.

Taking filling trace gas into a detected object as an example, arranging a detection head of a detection tube 10 in the detected object, placing the detected object in a sealed detection box 5, filling trace gas with a certain pressure into the detected object through the detection head of the detection tube 10, wherein the pressure outside the detected object is smaller than the pressure inside the detected object, if a leak point exists on the detected object, the trace gas inside the detected object overflows from the leak point, collecting gas components of the leaked gas by a gas collection module, comparing the gas components of various trace gases recorded into a gas processing module in advance with common gas components in the air, judging whether the gas in the sealed detection box 5 is the same as the trace gas filled into the detected object or not, detecting and identifying the concentration of the trace gas inside the sealed detection box 5 by a concentration detection module, and combining the comparison result of the gas components according to the change of the concentration of the trace gas, and then judging whether the detected object has a missing point.

Example 3

For easy understanding, referring to fig. 1, as a further modification of embodiment 1, a seal detection box 5 includes: the box body 5-1 and the box door 5-2 are hinged, and the box body 5-1 is hinged with the box door 5-2; a sealing strip is arranged at the contact part of the inner surface of the box door 5-2 and the box body 5-1, and a sealing structure in the sealing detection box 5 is formed by pressing the sealing strip after the box door 5-2 is closed; further comprising: a gas collecting device 7, a gas collecting pipe 8 and a valve 9; a valve 9 is arranged on the gas collecting pipe 8; the gas collecting device 7 is connected with the sealing detection box 5 through a gas collecting pipe 8.

It should be noted that the sealing detection box 5 is a closed box 5-1, and the box 5-1 is a rectangular structure, or may be other structures, specifically according to the needs of people. The gas collecting pipe 8 is provided with a valve 9, when the detected object is detected, the valve 9 is in a closed state, a good closed space is formed inside the sealed detection box 5, when the detection is finished, the detected object is detected to have leakage, if the box door 5-2 is opened at one time, the gas is completely dispersed, the gas in the sealed detection box 5 enters the gas collecting device 7 through the gas collecting pipe 8 by opening the valve 9 on the gas collecting pipe 8, the gas can be repeatedly utilized, the box body 5-1 is provided with a connecting hole, the shape of the connecting hole is consistent with that of the gas collecting pipe 8, the specific shape is determined according to the requirements of people, the aperture of the connecting hole is larger than that of the gas collecting pipe 8, the gas collecting pipe 8 is conveniently communicated with the sealed detection box 5 through the connecting hole, and a sealing element is arranged at the orifice of the connecting hole, so that gas is prevented from leaking from the gap of the connecting hole, and a closed space cannot be formed inside the sealing detection box 5.

Example 4

For easy understanding, referring to fig. 3, a second aspect of the present invention provides an embodiment of an automatic airtightness detection method, including the following steps:

placing the measured object into a sealed detection box 5 to be connected with a detection head of a detection tube 10;

the terminal server 4 sets a pressure value and release time, opens the gas pressure regulating valve 3, and the gas release source 1 releases gas to the pressure bin 6 through the vent pipe 2;

after the measured object is communicated with the pressure bin 6, the pressure detection module, the airflow detection module, the sound acquisition module, the sound processing module and the judgment module work in a matching mode to detect the air tightness of the measured object.

It should be noted that, an object to be detected is placed in the sealed detection box 5 and connected with the detection head of the detection tube 10, after the object to be detected is placed, the box door 5-2 is closed, whether the valve 9 on the gas collecting tube 8 is closed is detected, whether the sealed detection box 5 is a sealed space is detected, then detection is started, the terminal server 4 sets a pressure value and gas release time according to the type of the object to be detected, the gas pressure regulating valve 3 is opened for detection, the gas release source 1 releases gas to the pressure chamber 6 according to the set release time, after the object to be detected is communicated with the pressure chamber 6, the pressure detection module, the gas flow detection module, the sound collection module, the sound processing module and the judgment module work in a matching manner, and the airtightness of the object to be detected is detected.

Taking the tracer gas as an example, putting a measured object into a sealed detection box 5, and sealing and connecting the open end of the measured object with a detection head;

the terminal server 4 sets a pressure value and release time, opens the gas pressure regulating valve 3, and the gas release source 1 releases the tracer gas to the pressure bin 6 through the vent pipe 2;

after tracer gas fills the measured object from pressure chamber 6 through the detection head on the test tube 10, pressure detection module, air current detection module, sound collection module, sound processing module, gas collection module, gas processing module, concentration detection module and judgment module begin work and send the detection data of gathering to judgment module, and judgment module judges whether the gas tightness of measured object is qualified after comparing the detection data received with the detection data of the measured object that the gas tightness is qualified, and sends the judged result to terminal server 4.

It should be noted that the terminal server 4 sets a pressure value and a release time, and opens the gas pressure regulating valve 3, and the gas release source 1 releases the trace gas to the pressure chamber 6 through the vent pipe 2.

Recording sound information and various noises of a measured object with qualified air tightness during testing into a sound processing module in advance, wherein the decibel of the measured object with qualified air tightness is low, setting a threshold value according to the sound information of the measured object with qualified air tightness, sending the sound information detected in a sealing detection box 5 to the sound processing module by a sound acquisition module, comparing the received sound information with the sound information and various noises of the measured object with qualified air tightness during testing, eliminating the influence of various noises, and leaving the sound information of the measured object with qualified air tightness during testing, wherein when the sound information of the measured object is greater than the threshold value, the measured object is provided with a leak point, and otherwise, the measured object is a qualified product; and sending the result to a judging module;

the pressure detection module is arranged in the pressure bin 6 and is used for detecting the pressure information of the gas in the pressure bin 6, generating pressure data and sending the pressure data to the judgment module;

the gas flow detection module arranged in the sealed detection box 5 detects gas flow information in the sealed detection box 5 and generates gas flow data, and then the gas flow data is sent to the judgment module;

the gas collection module collects the components of the gas in the sealed detection box, compares the gas components of various tracer gases recorded to the gas processing module in advance with the common gas components in the air, and analyzes whether the gas in the sealed detection box 5 is the same as the tracer gas filled in the object to be detected; sending the analysis result to a judgment module;

the concentration detection module detects and identifies the concentration of the tracer gas in the sealed detection box 5, and sends the detected gas concentration data to the judgment module according to the change of the concentration of the tracer gas;

the judgment module receives detection data of the pressure detection module, the airflow detection module, the sound processing module, the gas processing module and the concentration detection module, and when the following five conditions are met simultaneously: when the detection data of the pressure detection module shows that the pressure value is not changed, the airflow data of the airflow detection module shows that no gas flows in the sealed detection box 5, the sound data of the sound processing module shows that the sound is not the sound of airflow leakage, the gas data generated by the gas processing module shows that the gas component is not tracer gas, the concentration detection module detects that the concentration information of the tracer gas in the sealed detection box 5 is not changed, the judgment module judges that the detected object is not leaked, the purpose that the airtightness of the detected object is independent of artificial judgment is achieved, the airtightness of the detected object is detected in a sealed space, and when the five conditions are simultaneously achieved, the airtightness of the detected object is good.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.