A system pipeline leakage alarm device under space on-orbit conditions

Abstract

A system pipeline leakage alarm device under space on-orbit conditions of the present application includes a processor and a flexible electrode, the flexible electrode is bonded to the outside of the pipeline to be tested, when the pipeline to be tested leaks, the flexible electrode generates a conduction signal; when the pipeline to be tested does not leak, the flexible electrode generates an insulation signal; the processor can alarm according to the conduction signal generated by the flexible electrode, so as to realize real-time monitoring of pipeline leakage; the system pipeline leakage alarm device under space on-orbit conditions of the present application improves the safety and reliability of the space on-orbit urine treatment system, and solves the needs of long-term space on-orbit model projects; the leakage alarm device adopts a split design, and the flexible electrode can be customized and installed according to actual working conditions, which can meet various actual working conditions; at the same time, the flexible electrode is replaceable. When the electrode life expires or is contaminated and corroded by seepage, only the electrode needs to be replaced, which can save operating costs.

Description

Technical Field

[0001] The present application belongs to the field of pipeline leakage detection, and specifically relates to a system pipeline leakage alarm device under on-orbit space conditions. Background Art

[0002] Manned spacecraft is a confined space environment that carries astronauts for space exploration. To ensure the normal life of astronauts, the atmosphere, temperature and humidity, drinking water, food and other conditions in the cabin space environment must be guaranteed. When manned spacecraft fly for a short period of time, the spacecraft carries materials to ensure space flight; as the manned spacecraft spends more time in orbit, it is no longer possible to rely on carrying materials to ensure the life of astronauts in space, and the cost of material supply and transportation between the ground and space is high. In order to ensure the long-term life of astronauts in space, material regeneration technologies have been developed, such as electrolysis oxygen production technology, CO2 reduction technology, water treatment (including urine treatment) and other technologies, among which water treatment (including urine treatment) is a more critical technology. The urine treatment process is: the collected urine and feces are pretreated by adding stabilizers. During the pretreatment process, strong oxidants (such as Cr2O3, potassium persulfate complex salt) and strong acid chemical pretreatment methods are usually used. This pretreatment method has the advantages of thorough sterilization, high efficiency and rapidity, but the substances used in this method are all strong oxidants, which have the disadvantages of corrosive containers, pipelines, pumps, etc., resulting in a reduction in the product life in the system pipeline, and even pipeline leakage during use. Physical and chemical methods are used to purify and treat it into recycled water, which is used to supplement astronauts' drinking water, sanitary water, etc. Catalytic oxidants are added during the water treatment process. This method has a relatively mild effect on the pipeline, but when the spacecraft is working in orbit for a long time, the pipeline may also leak and seep. Similarly, there is also the problem of pipeline leakage in the electrolysis of water. In the prior art, the leakage of the system pipeline under the condition of space on orbit cannot be monitored and alarmed in real time, affecting the stability of the space environment in the spacecraft cabin. Summary of the invention

[0003] In order to solve the problem that the existing technology cannot monitor and alarm the leakage of system pipelines in real time under the condition of space on-orbit, a system pipeline leakage alarm device under the condition of space on-orbit is proposed;

[0004] A system pipeline leakage alarm device under space on-orbit conditions, comprising a processor, a flexible electrode and a host computer; the flexible electrode is connected to the processor through a cable, and the processor is connected to the host computer through communication; the processor includes a signal processing module and a buzzer;

[0005] The flexible electrode is closely attached to the outside of the pipeline to be tested, and is used to detect whether there is leakage in the pipeline to be tested; when the pipeline to be tested leaks, the flexible electrode generates a conduction signal and sends the conduction signal to the signal processing module; when the pipeline to be tested does not leak, the flexible electrode generates an insulation signal and sends the insulation signal to the signal processing module;

[0006] The signal processing module is used to generate a high-level signal according to the received conduction signal and send the high-level signal to the host computer; the signal processing module generates a low-level signal according to the received insulation signal and sends the low-level signal to the host computer; the host computer controls the buzzer to alarm according to the received high-level signal.

[0007] Beneficial Effects

[0008] The present application discloses a system pipeline leakage alarm device under space on-orbit conditions, comprising a processor and a flexible electrode, wherein the flexible electrode is bonded to the outside of the pipeline to be tested, and when the pipeline to be tested leaks, the flexible electrode generates a conduction signal; when the pipeline to be tested does not leak, the flexible electrode generates an insulation signal; the processor can alarm according to the conduction signal generated by the flexible electrode, thereby realizing real-time monitoring of pipeline leakage; the present application discloses a system pipeline leakage alarm device under space on-orbit conditions, which is a pipeline leakage alarm device with high resolution and strong practicality, and improves the safety and reliability of the space on-orbit urine treatment system, and solves the needs of long-term space on-orbit model projects, and the device can be extended to other systems that have requirements for pipeline seepage and leakage; the leakage alarm device adopts a split design, and the flexible electrode can be customized and installed according to actual working conditions, so as to meet various actual working conditions; at the same time, the flexible electrode is replaceable, and when the electrode expires or is contaminated and corroded by seepage, only the electrode needs to be replaced, which can save operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a system pipeline leakage alarm device under space on-orbit conditions according to a specific implementation method of the present application;

[0010] Figure 2 This is a schematic diagram of a flexible electrode structure according to a specific embodiment of the present application;

[0011] Figure 3 A processor circuit diagram of a specific implementation of the present application. DETAILED DESCRIPTION

[0012] Specific implementation method 1: The following will be combined with the attached embodiment of the present invention Figure 1 To Attachment Figure 3 , illustrate this implementation mode, and clearly and completely describe the technical solutions in the embodiments of the present invention:

[0013] A system pipeline leakage alarm device under space on-orbit conditions, comprising a processor 2, a flexible electrode 1 and a host computer; the flexible electrode is connected to the processor through a cable 4, and the processor 2 is connected to the host computer for communication; the processor 2 includes a signal processing module and a buzzer 3;

[0014] The flexible electrode 1 is closely attached to the outside of the pipeline to be tested, and the flexible electrode is used to detect whether there is leakage in the pipeline to be tested; when the pipeline to be tested leaks, the flexible electrode 1 generates a conduction signal and sends the conduction signal to the signal processing module; when the pipeline to be tested does not leak, the flexible electrode 1 generates an insulation signal and sends the insulation signal to the signal processing module;

[0015] The signal processing module is used to generate a high-level signal according to the received conduction signal and send the high-level signal to the host computer; the signal processing module generates a low-level signal according to the received insulation signal and sends the low-level signal to the host computer; the host computer controls the buzzer 3 to alarm according to the received high-level signal.

[0016] Specifically, the system pipeline leakage alarm device under space on-orbit conditions adopts a split structure design, and the flexible electrode 1 can be designed to match the installation position, such as square, round, or other special-shaped structures. The circuit diagram of the processor 2 is shown in the attached figure. Figure 3 As shown, the power supply voltage is +12V, the integrated voltage regulator LM7805 (IC2) provides a stable reference voltage, and the output voltage is about 5V. After the voltage is divided by R5 and R6, the voltage is provided to the positive terminal of the operational amplifier IC1A. IC1C and IC1D are the first voltage follower and the second voltage follower respectively. The output voltage of IC1C is used as the input terminal of IC1B. IC1B is a differential amplifier with an amplification factor of about 51 times. When the liquid does not leak, no current flows through the debugging resistors R10, R11, and R12, and the output voltages of IC1C and IC1D are basically equal. After amplification by the differential amplifier, the output voltage is low. When the liquid leaks, the debugging resistors R10, R11, and R12 have current flowing through them, so the output voltage of the IC1D voltage follower increases, and after amplification by the differential amplifier, the output voltage is high. The Q1 transistor switch is turned on, and the buzzer starts to alarm.

[0017] Furthermore, the flexible electrode 1 includes an electrode base 5 and a plurality of electrode strips 6; the plurality of electrode strips 6 are closely attached to the outside of the pipeline to be tested; the plurality of electrode strips 6 are arranged on the surface of the electrode base, and every two adjacent electrode strips are arranged in parallel at a fixed distance, and the plurality of electrode strips are connected in series.

[0018] Specifically, the spacing between every two adjacent electrode strips is related to the resolution of the flexible electrode. The smaller the spacing, the higher the resolution, and the larger the spacing, the lower the resolution. The spacing between the electrode strips needs to be set according to the resolution requirements; the layout of the electrode strips adopts a direction parallel to the pipeline to produce small droplets.

[0019] Furthermore, the electrode substrate 5 is a polyimide film; each electrode strip 6 is a metal electrode strip made of gold or platinum.

[0020] Specifically, the metal electrode strips are printed on the upper surface of the polyimide film, and the material of the metal electrode strips is a precious metal material, such as gold, platinum or other conductive oxides.

[0021] Further, the fixed distance ranges from 1 to 9 millimeters. Specifically, the interval between every two adjacent electrode strips is 1 to 9 millimeters.

[0022] Furthermore, the processor also includes a power module, which is used to supply power to the flexible electrode, the signal processing module and the buzzer.

[0023] Furthermore, the flexible electrode further comprises a coverless shell 7, which is sleeved on the electrode base and the outside of the plurality of electrode strips, and the plurality of electrode strips are exposed outside the shell. Specific embodiment:

[0025] Polyimide film is a flexible electrode substrate material. Electrode strips made of gold are printed onto the polyimide film by printing, and the electrode strips are exposed. On the polyimide film, multiple metal electrode strips are connected in series to form a positive and negative electrode grid. The width of the metal electrode strip is 1mm, and the distances between adjacent electrodes are 1mm, 5mm, 9mm, and 13mm respectively. The layout of adjacent electrode lines is parallel to the direction of the spray droplets generated in the pump body.

[0026] Taking the drop volume of 1 ml as the alarm standard, using NaCl solution with a conductivity of 9.9 μS / cm, the electrode line width is 1 mm, and the spacing between each two adjacent electrode strips is 1 mm, 5 mm, 9 mm, and 13 mm respectively. The four electrode line spacing sensors are measured to see if an alarm occurs. The test results are shown in Table 1.

[0027] Table 1

[0028]

[0029]

[0030] Therefore, the distance between adjacent electrode strips is controlled to be 5 mm or less, and an alarm can be triggered if the leakage volume reaches more than 1 ml.

[0031] Taking the drop volume of 2ml as the alarm standard, using NaCl solution with a conductivity of 9.9μS / cm, the electrode line width is 1mm, and the spacing between each two adjacent electrode strips is 1mm, 5mm, 9mm, and 13mm respectively. The four electrode line spacing sensors are measured to see if an alarm occurs. The test results are shown in Table 2.

[0032] Table 2

[0033]

[0034] Therefore, the distance between adjacent electrode strips is controlled to be 9mm or less, and an alarm can be triggered if the leakage volume reaches more than 2ml.

[0035] In the on-orbit use of a system pipeline leakage alarm device under space on-orbit conditions of the present application, when the pipeline to be tested works normally without leakage, the positive and negative electrodes of the flexible electrode are in an insulated state, and the processor outputs a low-level (voltage value is not greater than 0.5V) signal at this time, and no alarm is given; as the system working time increases, when fatigue rupture occurs in the pipeline to be tested, liquid is sprayed onto the flexible electrode, and one or more points of the positive and negative electrodes of the flexible electrode are turned on, the processor outputs a high-level (voltage value is not less than 4.0V) signal to the host computer, and the buzzer alarms at the same time, prompting the personnel in the cabin and the ground test personnel to alarm information;

[0036] Ground staff understand the system working status through the host computer data, and the personnel in the orbital cabin understand the abnormal status of the pipeline based on the alarm. Ground staff and astronauts deal with system abnormalities in a timely manner. When an alarm is detected and the detection device does not return to the non-alarm state, the personnel in the orbital cabin will clean or replace the electrode components according to the condition of the electrodes to restore system functions.

[0037] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A system pipeline leakage alarm device under space on-orbit conditions, characterized by: It includes a processor, a flexible electrode and a host computer; the flexible electrode is connected to the processor through a cable, and the processor is connected to the host computer for communication; the processor includes a signal processing module and a buzzer; The flexible electrode is closely attached to the outside of the pipeline to be tested, and is used to detect whether there is leakage in the pipeline to be tested; when leakage occurs in the pipeline to be tested, the flexible electrode generates a conduction signal and sends the conduction signal to the signal processing module; When there is no leakage in the pipeline to be tested, the flexible electrode generates an insulation signal, and the insulation signal is sent to the signal processing module; The signal processing module is used to generate a high-level signal according to the received conduction signal and send the high-level signal to the host computer; the signal processing module generates a low-level signal according to the received insulation signal and sends the low-level signal to the host computer; the host computer controls the buzzer to alarm according to the received high-level signal.

2. According to claim 1, a system pipeline leakage alarm device under space on-orbit conditions is characterized by: The flexible electrode comprises an electrode base and a plurality of electrode strips; the plurality of electrode strips are closely attached to the outside of the pipeline to be tested; the plurality of electrode strips are arranged on the upper surface of the electrode base, every two adjacent electrode strips are arranged in parallel at a fixed distance, and the plurality of electrode strips are connected in series.

3. According to claim 2, a system pipeline leakage alarm device under space on-orbit conditions is characterized by: The electrode substrate is a polyimide film; each electrode strip is a metal electrode strip made of gold or platinum.

4. According to claim 2, a system pipeline leakage alarm device under space on-orbit conditions is characterized by: The fixed distance ranges from 1 to 9 mm.

5. According to claim 1, a system pipeline leakage alarm device under space on-orbit conditions is characterized by: The processor also includes a power module, which is used to supply power to the flexible electrode, the signal processing module and the buzzer.

6. The system pipeline leakage alarm device under space on-orbit conditions according to claim 2 is characterized by: The flexible electrode also includes a coverless shell, which is sleeved on the electrode base and the outside of the plurality of electrode strips, and the plurality of electrode strips are exposed outside the shell.

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