On-orbit leak detection method and device based on miniature vacuum sensor

Abstract

The embodiment of the invention provides an on-orbit leakage detection method and device based on a miniature vacuum sensor, and the method comprises the steps: determining a leakage detection mode, and obtaining a current vacuum degree signal; determining a leakage signal based on the leakage detection mode and the current vacuum degree signal; performing leakage state judgment based on the leakage signal and a target vacuum degree signal in a target time period, and determining a leakage model signal; a leak rate signal is determined based on the leakage model signal, and a leak detection result is determined based on the leak rate signal. The leakage model identification provided by the embodiment of the invention is beneficial to monitoring the development and change trend of leakage, provides more comprehensive leakage data for the on-orbit operation management of the spacecraft, and can quickly and accurately calculate the leakage rate in combination with the conductance and medium parameters of the sensor installation area and the real-time vacuum degree signal. And the minimum leak detection rate is relatively low, and the sensitivity is relatively high.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of on-orbit leakage detection for spacecraft, and in particular to an on-orbit leakage detection method based on a micro vacuum sensor. Background Art

[0002] Sealing performance is one of the key technical parameters of spacecraft. On-orbit leak detection is an effective technical way to detect and confirm the sealing performance of spacecraft during on-orbit operation, and is an important link to ensure the safe and stable operation of spacecraft during on-orbit operation. During the on-orbit operation of spacecraft, it will be affected by various factors such as vibration, vacuum, high and low temperature alternation, micrometeorites and space debris. These factors may cause the cabin and sealing structure to loosen, deform, surface oxidation, corrosion, damage and even perforation, thereby causing leakage. During the on-orbit operation of a spacecraft, any tiny leak may have a significant impact on its performance and even endanger the lives of astronauts. Therefore, on-orbit leak detection is a necessary means to ensure the safe operation of spacecraft.

[0003] With the advancement of aerospace technology and the advancement of human exploration of the universe, the scope of scientific exploration of outer space and the surface of stellar bodies has continued to expand, and the requirements for the sealing performance of spacecraft have become increasingly higher. New functional requirements continue to emerge and are incorporated into relevant development plans. Technological and functional diversification has also become a significant feature of spacecraft development.

[0004] With the implementation of major projects such as my country's space station, lunar exploration, deep space exploration, and on-orbit services, the long-term presence of spacecraft in orbit, and the exploration of extraterrestrial bodies such as the moon and Mars have increasingly increased the demand for on-orbit leak detection technology. Ultrasonic, static pressure change, acoustic emission and other leak detection methods have been applied on-orbit and have achieved certain results. For the needs of high-sensitivity real-time leak rate detection of the sealing surface of the on-orbit filling device, on-orbit sealing testing of small and medium-sized loads, and leakage detection of detachable flanges and narrow spaces, strict requirements are imposed on the real-time performance of the leak detection method, low resource consumption, and environmental adaptability. A more concise and reliable on-orbit leak detection method is urgently needed. Summary of the invention

[0005] In view of this, the embodiments of this specification provide an on-orbit leak detection method based on a micro vacuum sensor. One or more embodiments of this specification also relate to an on-orbit leak detection device based on a micro vacuum sensor, a computing device, a computer-readable storage medium, and a computer program to solve the technical defects existing in the prior art.

[0006] According to a first aspect of an embodiment of this specification, there is provided an on-orbit leak detection method based on a micro vacuum sensor, comprising:

[0007] Determine the leak detection mode and obtain the current vacuum degree signal;

[0008] Determine a leak signal based on the leak detection mode and the current vacuum signal;

[0009] The leakage state is judged based on the leakage signal and the target vacuum signal within the target time period, and the leakage model signal is determined;

[0010] A leak rate signal is determined based on the leak model signal, and a leak detection result is determined based on the leak rate signal.

[0011] In a possible implementation, determining the leak detection mode includes:

[0012] The on-orbit working status of the spacecraft is obtained, and a leak detection mode is determined based on the on-orbit working status of the spacecraft; wherein the leak detection mode includes a loading mode and a working mode, the loading mode is used when the spacecraft working medium is in the loading process, and the working mode is used when the spacecraft working medium is in the loading state.

[0013] In a possible implementation, determining a leakage signal based on a leak detection mode and a current vacuum signal includes:

[0014] Determining a vacuum signal threshold based on a leak detection mode;

[0015] A leakage signal is determined based on the current vacuum signal and the vacuum signal threshold.

[0016] In a possible implementation, when the leak detection mode is the loading mode, the leakage state is judged based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including:

[0017] In the presence of a leak signal, determining a time constant based on the target area volume and the leak channel conductance;

[0018] collecting at least two target vacuum degree signals within a target time period based on a time constant;

[0019] The leakage state is judged based on at least two target vacuum signals to determine a leakage model signal; wherein the leakage model signal includes a continuously increasing leakage model signal, a stable leakage model signal and a decreasing leakage model signal.

[0020] In a possible implementation, when the leak detection mode is the working mode, the leakage state is judged based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including:

[0021] In the case of a leakage signal, determining a preset vacuum signal;

[0022] Compare the target vacuum degree signal within the target time period with the preset vacuum degree signal to determine the comparison result;

[0023] In the case where the comparison result continues to increase, determining to increase the leakage model signal;

[0024] When the comparison result is that the target vacuum signal within the target time period is greater than the preset vacuum signal times the target coefficient, and the target vacuum signal remains unchanged, determining a stable leakage model signal;

[0025] In the event of a persistent decrease in the comparison result, a reduced leakage model signal is determined.

[0026] In a possible implementation, determining a leakage rate signal based on a leakage model signal includes:

[0027] When the leakage model signal is an increased leakage model signal, a first vacuum degree signal before the working medium is loaded and a second vacuum degree signal after the working medium is loaded are obtained;

[0028] A leak rate signal is determined based on the first vacuum level signal, the second vacuum level signal, and the leakage channel conductance.

[0029] In a possible implementation, determining a leakage rate signal based on a leakage model signal includes:

[0030] determining the leakage channel conductance when the leakage model signal is an increased leakage model signal;

[0031] The leak rate signal is determined based on the leak channel conductance and the current vacuum signal.

[0032] According to a second aspect of the embodiments of this specification, there is provided an on-orbit leak detection device based on a micro vacuum sensor, comprising:

[0033] A mode determination module is configured to determine a leak detection mode and obtain a current vacuum degree signal;

[0034] a leakage signal module configured to determine a leakage signal based on a leakage detection mode and a current vacuum signal;

[0035] A model signal module is configured to determine a leakage state based on the leakage signal and a target vacuum signal within a target time period, and determine a leakage model signal;

[0036] The leak detection result module is configured to determine a leak rate signal based on the leak model signal, and determine a leak detection result based on the leak rate signal.

[0037] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0038] Memory and processor;

[0039] The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the above-mentioned on-orbit leak detection method based on a micro vacuum sensor are implemented.

[0040] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores computer-executable instructions, and when the instructions are executed by a processor, the steps of the above-mentioned on-orbit leak detection method based on a micro vacuum sensor are implemented.

[0041] According to a fifth aspect of the embodiments of this specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned on-orbit leak detection method based on a micro vacuum sensor.

[0042] The embodiments of this specification provide an on-orbit leak detection method and device based on a micro vacuum sensor, wherein the on-orbit leak detection method based on a micro vacuum sensor includes: determining a leak detection mode and obtaining a current vacuum signal; determining a leakage signal based on the leak detection mode and the current vacuum signal; judging the leakage state based on the leakage signal and the target vacuum signal within the target time period and determining a leakage model signal; determining a leakage rate signal based on the leakage model signal, and determining a leak detection result based on the leakage rate signal. The leakage model identification provided by the embodiments of this specification is conducive to monitoring the development and change trend of leakage, providing more comprehensive leakage data for the on-orbit operation management of spacecraft, and combining the flow conductance and medium parameters of the sensor installation area and the real-time vacuum signal to quickly and accurately calculate the leakage rate, and has a small minimum detectable leakage rate and high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a flow chart of an on-orbit leak detection method based on a micro vacuum sensor provided by an embodiment of this specification;

[0044] Figure 2 It is a system schematic diagram of an on-orbit leak detection method based on a micro vacuum sensor provided by an embodiment of this specification;

[0045] Figure 3 It is a structural schematic diagram of an on-orbit leak detection device based on a micro vacuum sensor provided by an embodiment of this specification;

[0046] Figure 4 It is a structural block diagram of a computing device provided by an embodiment of this specification. DETAILED DESCRIPTION

[0047] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0048] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0049] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0050] In this specification, an on-orbit leak detection method based on a miniature vacuum sensor is provided. This specification also relates to an on-orbit leak detection device based on a miniature vacuum sensor, a computing device, and a computer-readable storage medium, which are described in detail one by one in the following embodiments.

[0051] See also Figure 1 , Figure 1 A flow chart of an on-orbit leak detection method based on a micro vacuum sensor provided according to an embodiment of the present specification is shown, which specifically includes the following steps.

[0052] Step 101: Determine the leak detection mode and obtain the current vacuum degree signal.

[0053] In one possible implementation, determining the leak detection mode includes: obtaining the on-orbit working status of the spacecraft, and determining the leak detection mode based on the on-orbit working status of the spacecraft; wherein the leak detection mode includes a loading mode and a working mode, the loading mode is used when the spacecraft working medium is in the loading process, and the working mode is used when the spacecraft working medium is in the loading state.

[0054] In actual applications, before implementing the method of this scheme, a miniature vacuum sensor and a vacuum gauge are installed in the target area where leak detection is required. After the spacecraft is launched into the predetermined working space, a preset leak detection mode is selected according to measurement needs, and the vacuum gauge is turned on to collect and detect real-time vacuum degree signals.

[0055] Specifically, the target area where the micro vacuum sensor is installed is a non-sealed area, and if the working medium leaks, it will enter the target area. The leaked medium will cause a change in the vacuum degree of the target area, that is, an increase in the pressure value, and will enter the outer vacuum environment through a preset leakage channel. The conductance of the preset leakage channel is LD, which can be obtained by calculation or ground simulation test.

[0056] Furthermore, a preset leak detection mode is selected: the leak detection mode is selected according to the spacecraft's on-orbit working status and leak detection requirements. The leak detection mode is divided into two modes: loading mode and working mode. The loading mode means that the working medium has a loading process during the leak detection process, and the working mode means that the spacecraft's working medium is always in a loading state. After determining the leak detection mode, the vacuum gauge is turned on and the vacuum degree is measured by a micro vacuum sensor to obtain a real-time vacuum degree signal p.

[0057] The embodiments of this specification use a miniature vacuum sensor with low power consumption and small size as a leak detection vacuum signal acquisition instrument, which consumes little on-orbit resources of the spacecraft and can work in a space vacuum environment. The adaptability to the space environment and the installation adaptability are greatly improved compared to traditional leak detectors. It can solve the problem of detecting the sealing performance of on-orbit filling interfaces, sealing flanges, pipe joints, etc. of spacecraft when working on-orbit, and improve the safety level of spacecraft operation on-orbit.

[0058] Step 102: Determine a leakage signal based on the leak detection mode and the current vacuum signal.

[0059] In actual applications, during the detection process, combined with the working status of the spacecraft, the vacuum signal of the target area is compared with the preset vacuum background value, or the vacuum background value before working loading, to identify and judge the leak in the target area and generate a leakage signal.

[0060] In a possible implementation, determining the leakage signal based on the leakage detection mode and the current vacuum signal includes: determining a vacuum signal threshold based on the leakage detection mode; and determining the leakage signal based on the current vacuum signal and the vacuum signal threshold.

[0061] In practical applications, the judgment process of whether there is leakage is as follows: for the loading mode, the vacuum signal p after the working medium is loaded ZH Greater than p before working medium loading ZQWhen the vacuum signal is greater than the preset vacuum signal p, a leakage signal is generated, otherwise a no leakage signal is generated. For the working mode, the working medium is always in the loading state, and the real-time vacuum signal p of the target area is greater than the preset vacuum signal p YS A leakage signal is generated when the value is 0, and a non-leakage signal is generated when the value is 0.

[0062] The sensor installation space of the embodiment of this specification is a non-sealed structure. If the working medium leaks, it will enter the target area. The leaked medium will cause the vacuum degree of the target area to change, that is, the pressure value will increase, and the leakage response will be rapid. At the same time, due to the use of a non-sealed structure, there is no need to design a separate sealing structure for the vacuum sensor installation space, so the leak detection method is simple and has high economic efficiency.

[0063] Step 103: judging the leakage state based on the leakage signal and the target vacuum signal within the target time period, and determining the leakage model signal.

[0064] In practical applications, by detecting a plurality of vacuum signal increments at equal time intervals, the leakage model is identified according to the vacuum increments and a leakage model signal is generated.

[0065] In one possible implementation, when the leak detection mode is the loading mode, a leakage state judgment is performed based on the leakage signal and the target vacuum signal within the target time period, and a leakage model signal is determined, including: in the presence of a leakage signal, a time constant is determined based on the target area volume and the conductance of the leakage channel; at least two target vacuum signals are collected within the target time period based on the time constant; the leakage state is judged based on the at least two target vacuum signals, and a leakage model signal is determined; wherein the leakage model signal includes a continuously increasing leakage model signal, a stable leakage model signal, and a decreasing leakage model signal.

[0066] In actual applications, when there is a leak, the leakage model identification process in the loading mode is as follows: the target area volume V is divided by the preset leakage channel conductance LD to obtain the time constant t, and after 5t time has passed since the working medium was loaded in step 2, two real-time vacuum signals are collected. The time interval between the two collections is within the time interval of t and 3t. If the second vacuum signal P2 is 5% or more than 5% greater than the first vacuum signal P1, an increase leakage model signal is generated. If the second vacuum signal P2 is in the range of 0.95 times to 1.05 times the first vacuum signal P1, a stable leakage model signal is generated. If the second vacuum signal P2 is less than 0.95 times the first vacuum signal P1, a decrease leakage model signal is generated.

[0067] In one possible implementation, when the leak detection mode is the working mode, the leakage state is judged based on the leakage signal and the target vacuum signal within the target time period, and the leakage model signal is determined, including: when there is a leakage signal, a preset vacuum signal is determined; the target vacuum signal within the target time period is compared with the preset vacuum signal to determine a comparison result; when the comparison result continues to increase, an increase leakage model signal is determined; when the comparison result is that the target vacuum signal within the target time period is greater than the preset vacuum signal times the target coefficient, and the target vacuum signal remains unchanged, a stable leakage model signal is determined; when the comparison result continues to decrease, a decrease leakage model signal is determined.

[0068] In actual applications, when there is a leak, the leakage model identification process in the working mode is as follows: after the outer side of the spacecraft reaches a high vacuum environment, the vacuum real-time signal p generated in step 1 is compared with the preset vacuum signal PY. If the vacuum implementation signal p continues to increase, a continuously increasing leakage model signal is generated. If p is greater than a·PY and p remains stable, a is the leakage judgment coefficient, a stable leakage model signal is generated. If the vacuum real-time signal p continues to decrease, a decreasing leakage model signal is generated.

[0069] The leak rate calculation method of the embodiment of this specification provides two modes: whether the working medium is loaded or not, and provides a leak rate calculation method in these two modes, which can cover the leak detection needs of specific target areas of spacecraft. Combining the flow conductance and medium parameters of the sensor installation area and the real-time vacuum signal, the leak rate can be calculated quickly and accurately, and has a small minimum detectable leak rate and high sensitivity.

[0070] Step 104: Determine a leak rate signal based on the leak model signal, and determine a leak detection result based on the leak rate signal.

[0071] In practical applications, based on the detected vacuum signal change value and the generated leakage model signal, the predetermined target area conductance, medium coefficient and other parameters are substituted to calculate and generate a leakage rate signal; further, based on the generated leakage rate signal, the obtained leakage rate signal is compared with the leakage rate threshold to identify whether the generated leakage rate exceeds the standard signal.

[0072] In one possible implementation, determining a leakage rate signal based on a leakage model signal includes: when the leakage model signal is an increasing leakage model signal, obtaining a first vacuum signal before the working medium is loaded and a second vacuum signal after the working medium is loaded; and determining the leakage rate signal based on the first vacuum signal, the second vacuum signal and the conductance of the leakage channel.

[0073] In actual applications, for the loading mode, the vacuum signal P1 before the working medium is loaded and the vacuum signal P2 after loading are obtained, and the difference is made. Then, the preset flow conductance LD of the target area is substituted into the formula Q = (P2-P1) × LD to calculate the leakage rate.

[0074] In a possible implementation, determining the leakage rate signal based on the leakage model signal includes: determining the leakage channel conductance when the leakage model signal is an increasing leakage model signal; and determining the leakage rate signal based on the leakage channel conductance and the current vacuum signal.

[0075] In practical applications, for the working mode, the real-time vacuum signal p of the target area is obtained, and the target area flow conductance LD and the predetermined vacuum signal p are YS Substitute into the formula Q = (pP ys )×LD.

[0076] Further, after obtaining the leak rate Q, the leak rate Q is compared with the preset leak rate threshold Q sy Compare. If Q>Q sy , a leak rate exceeding limit signal is generated. If Q≤Q sy , then a signal that the leakage rate does not exceed the standard is generated. sy With a certain safety margin, Q sy Equal to 0.8·Q0, where Q0 is the leakage rate index of the detection object.

[0077] Furthermore, after the leakage rate exceeds the standard, an alarm or prompt may be issued to enable the staff to perform corresponding operations, such as reducing the pressure of the working medium.

[0078] The leakage model identification of the embodiments of this specification covers three leakage models: a stable leakage model, i.e., the leakage rate remains unchanged; an increasing leakage model, i.e., the leakage rate changes; and a decreasing leakage model, i.e., the leakage rate decreases. This is beneficial for monitoring the leakage development and change trends and providing more comprehensive leakage data for the on-orbit operation management of spacecraft.

[0079] In one possible implementation, see Figure 2 The system corresponding to this solution specifically includes: vacuum degree acquisition module, processing and calculation module, identification and judgment module and comprehensive processing unit. Vacuum degree acquisition module: used for measuring the vacuum degree signal of the target detection area, and sending the signal to the comprehensive processing unit, processing and calculation module and identification and diagnosis module; processing and calculation module: used for analyzing and calculating the real-time vacuum degree signal, and then sending the calculation result to the comprehensive processing unit; identification and diagnosis module receives the real-time vacuum degree signal, identifies and diagnoses to generate leakage signal, leakage model and leakage exceeding standard signal, and sends the signal to the comprehensive processing unit.

[0080] The embodiments of this specification provide an on-orbit leak detection method and device based on a micro vacuum sensor, wherein the on-orbit leak detection method based on a micro vacuum sensor includes: determining a leak detection mode and obtaining a current vacuum signal; determining a leakage signal based on the leak detection mode and the current vacuum signal; judging the leakage state based on the leakage signal and the target vacuum signal within the target time period and determining a leakage model signal; determining a leakage rate signal based on the leakage model signal, and determining a leak detection result based on the leakage rate signal. The leakage model identification provided by the embodiments of this specification is conducive to monitoring the development and change trend of leakage, providing more comprehensive leakage data for the on-orbit operation management of spacecraft, and combining the flow conductance and medium parameters of the sensor installation area and the real-time vacuum signal to quickly and accurately calculate the leakage rate, and has a small minimum detectable leakage rate and high sensitivity.

[0081] Corresponding to the above method embodiment, this specification also provides an embodiment of an on-orbit leak detection device based on a micro vacuum sensor, Figure 3 FIG. 1 shows a schematic diagram of the structure of an on-orbit leak detection device based on a micro vacuum sensor provided by an embodiment of the present specification. Figure 3 As shown, the device comprises:

[0082] The mode determination module 301 is configured to determine the leak detection mode and obtain the current vacuum degree signal;

[0083] A leakage signal module 302 is configured to determine a leakage signal based on a leak detection mode and a current vacuum signal;

[0084] The model signal module 303 is configured to determine the leakage state based on the leakage signal and the target vacuum signal within the target time period, and determine the leakage model signal;

[0085] The leak detection result module 304 is configured to determine a leak rate signal based on the leak model signal, and determine a leak detection result based on the leak rate signal.

[0086] In a possible implementation, determining the leak detection mode includes:

[0087] The on-orbit working status of the spacecraft is obtained, and a leak detection mode is determined based on the on-orbit working status of the spacecraft; wherein the leak detection mode includes a loading mode and a working mode, the loading mode is used when the spacecraft working medium is in the loading process, and the working mode is used when the spacecraft working medium is in the loading state.

[0088] In a possible implementation, determining a leakage signal based on a leak detection mode and a current vacuum signal includes:

[0089] Determining a vacuum signal threshold based on a leak detection mode;

[0090] A leakage signal is determined based on the current vacuum signal and the vacuum signal threshold.

[0091] In a possible implementation, when the leak detection mode is the loading mode, the leakage state is judged based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including:

[0092] In the presence of a leak signal, determining a time constant based on the target area volume and the leak channel conductance;

[0093] collecting at least two target vacuum degree signals within a target time period based on a time constant;

[0094] The leakage state is judged based on at least two target vacuum signals to determine a leakage model signal; wherein the leakage model signal includes a continuously increasing leakage model signal, a stable leakage model signal and a decreasing leakage model signal.

[0095] In a possible implementation, when the leak detection mode is the working mode, the leakage state is judged based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including:

[0096] In the case of a leakage signal, determining a preset vacuum signal;

[0097] Compare the target vacuum degree signal within the target time period with the preset vacuum degree signal to determine the comparison result;

[0098] In the case where the comparison result continues to increase, determining to increase the leakage model signal;

[0099] When the comparison result is that the target vacuum signal within the target time period is greater than the preset vacuum signal times the target coefficient, and the target vacuum signal remains unchanged, determining a stable leakage model signal;

[0100] In the event of a persistent decrease in the comparison result, a reduced leakage model signal is determined.

[0101] In a possible implementation, determining a leakage rate signal based on a leakage model signal includes:

[0102] When the leakage model signal is an increased leakage model signal, a first vacuum degree signal before the working medium is loaded and a second vacuum degree signal after the working medium is loaded are obtained;

[0103] A leak rate signal is determined based on the first vacuum level signal, the second vacuum level signal, and the leakage channel conductance.

[0104] In a possible implementation, determining a leakage rate signal based on a leakage model signal includes:

[0105] determining the leakage channel conductance when the leakage model signal is an increased leakage model signal;

[0106] The leak rate signal is determined based on the leak channel conductance and the current vacuum signal.

[0107] The embodiments of this specification provide an on-orbit leak detection method and device based on a micro vacuum sensor, wherein the on-orbit leak detection device based on a micro vacuum sensor includes: determining a leak detection mode and obtaining a current vacuum signal; determining a leak signal based on the leak detection mode and the current vacuum signal; judging the leak state based on the leak signal and the target vacuum signal within the target time period and determining a leak model signal; determining a leak rate signal based on the leak model signal, and determining a leak detection result based on the leak rate signal. The leak model identification provided by the embodiments of this specification is conducive to monitoring the trend of leak development and change, providing more comprehensive leak data for the on-orbit operation management of spacecraft, and combining the flow conductance and medium parameters of the sensor installation area and the real-time vacuum signal to quickly and accurately calculate the leak rate, and has a small minimum detectable leak rate and high sensitivity.

[0108] The above is a schematic scheme of an on-orbit leak detection device based on a micro vacuum sensor of this embodiment. It should be noted that the technical scheme of the on-orbit leak detection device based on a micro vacuum sensor and the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor belong to the same concept, and the details of the technical scheme of the on-orbit leak detection device based on a micro vacuum sensor that are not described in detail can be referred to the description of the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor.

[0109] Figure 4 The block diagram of a computing device 400 according to one embodiment of the present specification is shown. The components of the computing device 400 include but are not limited to a memory 410 and a processor 420. The processor 420 is connected to the memory 410 via a bus 430, and the database 450 is used to store data.

[0110] The computing device 400 also includes an access device 440 that enables the computing device 400 to communicate via one or more networks 460. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 440 may include one or more of any type of network interface (e.g., a network interface card (NIC)) that is wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a world-wide interoperability for microwave access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, and a near field communication (NFC).

[0111] In one embodiment of the present specification, the above components of the computing device 400 and Figure 4 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Figure 4 The computing device structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of this specification. Those skilled in the art can add or replace other components as needed.

[0112] The computing device 400 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (e.g., a smart phone), a wearable computing device (e.g., a smart watch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 400 may also be a mobile or stationary server.

[0113] Among them, the processor 420 is used to execute the following computer executable instructions, which, when executed by the processor, implement the steps of the above-mentioned on-orbit leak detection method based on a miniature vacuum sensor. The above is a schematic scheme of a computing device of this embodiment. It should be noted that the technical scheme of the computing device and the technical scheme of the above-mentioned on-orbit leak detection method based on a miniature vacuum sensor belong to the same concept. For details not described in detail in the technical scheme of the computing device, please refer to the description of the technical scheme of the above-mentioned on-orbit leak detection method based on a miniature vacuum sensor.

[0114] An embodiment of the present specification also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the above-mentioned on-orbit leak detection method based on a micro vacuum sensor.

[0115] The above is a schematic scheme of a computer-readable storage medium of this embodiment. It should be noted that the technical scheme of the storage medium and the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor are of the same concept, and the details not described in detail in the technical scheme of the storage medium can be found in the description of the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor.

[0116] An embodiment of the present specification further provides a computer program, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned on-orbit leak detection method based on a micro vacuum sensor.

[0117] The above is a schematic scheme of a computer program of this embodiment. It should be noted that the technical scheme of the computer program and the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor are of the same concept, and the details not described in detail in the technical scheme of the computer program can be found in the description of the technical scheme of the on-orbit leak detection method based on a micro vacuum sensor.

[0118] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0119] The computer instructions include computer program codes, which may be in source code form, object code form, executable files or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0120] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0121] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0122] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. An on-orbit leak detection method based on a micro vacuum sensor, characterized in that: include: Determine the leak detection mode and obtain the current vacuum degree signal; determining a leakage signal based on the leakage detection mode and the current vacuum signal; Perform leakage state judgment based on the leakage signal and a target vacuum signal within a target time period, and determine a leakage model signal; A leak rate signal is determined based on the leak model signal, and a leak detection result is determined based on the leak rate signal.

2. The method according to claim 1, characterized in that The step of determining the leak detection mode comprises: The on-orbit working state of the spacecraft is obtained, and a leak detection mode is determined based on the on-orbit working state of the spacecraft; wherein the leak detection mode includes a loading mode and a working mode, the loading mode is used when the working medium of the spacecraft is in the loading process, and the working mode is used when the working medium of the spacecraft is in the loading state.

3. The method according to claim 1, characterized in that The determining of the leakage signal based on the leakage detection mode and the current vacuum signal comprises: determining a vacuum signal threshold based on the leak detection mode; A leakage signal is determined based on the current vacuum signal and the vacuum signal threshold.

4. The method according to claim 2, characterized in that When the leak detection mode is the loading mode, the leakage state judgment is performed based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including: In the presence of the leakage signal, determining a time constant based on the target region volume and the leakage channel conductance; collecting at least two target vacuum degree signals within a target time period based on the time constant; The leakage state is judged based on the at least two target vacuum signals to determine a leakage model signal; wherein the leakage model signal includes a continuously increasing leakage model signal, a stable leakage model signal and a decreasing leakage model signal.

5. The method according to claim 2, characterized in that: When the leak detection mode is the working mode, the leakage state judgment is performed based on the leakage signal and the target vacuum signal within the target time period to determine the leakage model signal, including: In the presence of the leakage signal, determining a preset vacuum signal; Comparing the target vacuum degree signal within the target time period with the preset vacuum degree signal to determine a comparison result; In the case where the comparison result continues to increase, determining to increase the leakage model signal; Determine a stable leakage model signal when the comparison result is that the target vacuum signal within the target time period is greater than the preset vacuum signal times the target coefficient, and the target vacuum signal remains unchanged; In the event of a persistent decrease in the comparison result, a reduced leakage model signal is determined.

6. The method according to claim 4, characterized in that The determining of the leakage rate signal based on the leakage model signal comprises: When the leakage model signal is an increased leakage model signal, obtaining a first vacuum degree signal before the working medium is loaded and a second vacuum degree signal after the working medium is loaded; A leak rate signal is determined based on the first vacuum level signal, the second vacuum level signal, and the leak channel conductance.

7. The method according to claim 5, characterized in that The determining of the leakage rate signal based on the leakage model signal comprises: determining the leakage channel conductance when the leakage model signal is an increased leakage model signal; A leak rate signal is determined based on the leak channel conductance and the current vacuum signal.

8. An on-orbit leak detection device based on a micro vacuum sensor, characterized in that: include: A mode determination module is configured to determine a leak detection mode and obtain a current vacuum degree signal; a leakage signal module configured to determine a leakage signal based on the leakage detection mode and the current vacuum signal; A model signal module is configured to determine a leakage state based on the leakage signal and a target vacuum signal within a target time period, and determine a leakage model signal; The leak detection result module is configured to determine a leak rate signal based on the leak model signal, and determine a leak detection result based on the leak rate signal.

9. A computing device, characterized in that include: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the on-orbit leak detection method based on a micro vacuum sensor as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the on-orbit leak detection method based on a micro vacuum sensor as described in any one of claims 1 to 7.

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