High-precision inertial platform automatic air pumping device and air pumping method thereof

Abstract

The application relates to the field of platform type inertial navigation product maintenance, in particular to a high-precision automatic air extraction and charging equipment for an inertial platform and an air extraction and charging method thereof. The automatic air extraction and charging equipment comprises a display control panel and a manual operation screen; a nitrogen cylinder cabinet is used for storing an air pressure extraction device, and the specific steps are as follows: step 1, adjusting pressure; step 2, vacuum extraction; step 3, nitrogen charging; and step 4, improving nitrogen purity in the inertial platform. Through an absolute pressure sensor and a pressure display instrument, the automatic air extraction and charging function is realized, and a user no longer needs to manually disconnect the air extraction and charging switch by observing a pressure gauge. An electric high-vacuum pressure reducing valve is arranged between the air extraction and charging pressure and the vacuum degree pressure of the inertial platform, which can adjust the air charging pressure and ensure that the air pressure in the inertial platform is stable after the air charging valve is disconnected. By adjusting the front-stage air charging pressure value, high-precision control of the nitrogen pressure in the inertial platform is realized.

Description

Technical Field

[0001] This invention relates to the field of maintenance of platform-type inertial navigation products, specifically a high-precision automatic air pumping and inflation device for inertial platforms and its air pumping and inflation method. Background Technology

[0002] Platform-based inertial navigation products use a large number of electromechanical components such as conductive rings and motors. During operation, these components may generate electric sparks due to their energized rotation, which can easily cause carbon buildup on conductive rings, slip rings, and motor brushes, affecting the performance of the components and leading to a decrease in the performance of the inertial navigation product or even its inability to work properly. Therefore, nitrogen is generally filled into the inertial platform as a protective gas to prevent the occurrence of electric sparks.

[0003] Currently, commonly used inertial platform inflation equipment typically employs manual inflation. This method involves manually disconnecting the pressure gauge connected to the inertial platform to control vacuuming and inflation. Incomplete vacuuming results in excess air not being completely removed from the inertial platform, leading to a decrease in nitrogen purity after inflation. It also makes it impossible to effectively check the leakage rate of the inertial platform. Low inflation pressure accuracy prevents pressure balance with external atmospheric pressure, causing excessively rapid nitrogen leakage within the inertial platform and compromising protection throughout the product's operational lifespan. Uneven inflation speed and uncontrollable pressure during inflation can easily cause damage to personnel or delicate components within the inertial platform due to excessive pressure. Furthermore, impurities in the nitrogen cylinder can enter the inertial platform during inflation, causing product damage. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a high-precision automatic inflation / deflation device for inertial platforms and its inflation / deflation method.

[0005] A high-precision automatic inflation / deflation device for an inertial platform, comprising:

[0006] Display control panel for easy manual screen operation;

[0007] Nitrogen cylinder cabinet, a device used to store nitrogen gas at its outlet pressure;

[0008] The nitrogen cylinder cabinet includes two sets of nitrogen cylinders, a nitrogen cylinder pressure reducing valve, a pressure sensor, a solenoid valve A, a precision filter, a nitrogen cylinder precision pressure reducing valve, a precision throttle valve, a solenoid valve B, an absolute pressure sensor, an electric high vacuum pressure reducing valve, a solenoid valve C located downstream of solenoid valve B and connected in series with the absolute pressure sensor, a vacuum pump connected to solenoid valve C, and an electric high vacuum pressure reducing valve controller connected to the electric high vacuum pressure reducing valve.

[0009] The display control panel includes a vacuum indicator, a gas filling / vacuuming pressure indicator, a nitrogen cylinder pressure indicator, a gas filling indicator, a gas filling indicator, a gas filling indicator, a power indicator, a main power switch, a gas filling switch, a gas filling switch, a precision pressure gauge, a precision throttle valve, a buzzer, and a silencer switch.

[0010] The two sets of nitrogen cylinders are used to fill the inertial platform and as backup nitrogen cylinders, respectively.

[0011] The vacuum pump mentioned is a two-stage rotary vane vacuum pump.

[0012] The nitrogen cylinder is equipped with a cylinder switch and a cylinder pressure regulating switch, an outlet pipe pressure gauge and a nitrogen cylinder pressure gauge installed on the cylinder pressure regulating switch 203 for monitoring the nitrogen cylinder pressure and the filling and discharging pressure, and an outlet pipe connected to the cylinder pressure regulating switch.

[0013] The electric high vacuum pressure reducing valve controller includes an automatic fuse SB and a fuse BXL that automatically disconnect the equipment power supply when the current is too high; an AC contactor K2 that disconnects the pumping and charging power supply when the nitrogen cylinder outlet pressure is too high or too low; a buzzer A and a buzzer control switch K7 that issue overpressure / insufficient pressure alarms; a main power switch SB1 that connects and disconnects the equipment pumping and charging power supply; pressure displays XMT1 to XMT3 for pumping and charging pressure detection; absolute pressure sensors 1 to 3; a temperature controller KT for detecting the equipment ambient temperature; a solenoid valve YA for controlling the nitrogen cylinder outlet pipeline switch; a solenoid valve YB for controlling the pumping and charging pipeline switch; a solenoid valve YC for controlling the vacuum pump pipeline switch; a time delay relay K3 for delaying the disconnection of the vacuum pump; a charging switch K5; a pumping switch K6; an electric high vacuum pressure reducing valve controller KZQ; and a vacuum pressure reducing valve control switch K4.

[0014] The pressure display instruments XMT1 to XMT3, combined with absolute pressure sensors 1 to 3, are used for detecting the pressure of the pumping and filling system, the pressure of the inertial platform, and the pressure of the nitrogen cylinder, respectively.

[0015] The vacuum pressure reducing valve control switch K4 is used to connect the vacuum pressure reducing valve controller and control the operation of the electric vacuum pressure reducing valve.

[0016] A method for pumping and filling a high-precision automatic inertial platform air pumping and filling device, the specific steps of which are as follows:

[0017] Step 1: Adjust the pressure: Turn on the automatic fuse SB, the buzzer A will sound an alarm, turn on the nitrogen cylinder switch, adjust the cylinder pressure regulating switch so that the nitrogen cylinder pressure display on the control panel is between 0.1MPa and 0.5MPa, the buzzer A will stop sounding an alarm, and the pre-start preparation is complete.

[0018] Step 2: Vacuuming: Close the main power switch on the display control panel, close the vacuum switch, the vacuum indicator light on the panel will light up, the vacuum pump will start working, and the inertial platform will begin to be vacuumed. When the vacuum pressure display shows that the pressure is less than the set pressure of 3 kPa, the vacuum indicator light will light up. After the equipment automatically delays for 10 seconds, the vacuum pump will stop working. At this time, the vacuum indicator light will go out, and the vacuum switch will be turned off.

[0019] Step 3: Nitrogen filling: Close the filling switch, the filling indicator light will illuminate, and nitrogen filling of the inertial platform will begin;

[0020] Step 4: Improve the nitrogen purity in the inertial platform: Repeat steps S2 and S3 2 to 3 times, and select one time to evacuate and use the static pressure boosting method to measure the leakage rate of the inertial platform. When the indicator light comes on after evacuation, start the leakage rate test. If the pressure change displayed by the vacuum indicator 101 is not greater than the maximum value of the equipment leakage rate within 2 hours, it is qualified. The equipment leakage rate is ≤3.0x10-4 KPa·L / S.

[0021] In step S3, when the pressure displayed by the pumping and inflation pressure indicator reaches the set inflation pressure, that is, the nitrogen pressure in the inertial platform is 95.3KPa±3Kpa, inflation will automatically stop by adjusting the inflation pressure setting value of the pumping and inflation pressure indicator. At this time, the inflation indicator light will turn off, the inflation-to-pressure indicator light will turn on, and the inflation switch will be turned off.

[0022] The beneficial effects of this invention are as follows: This invention realizes automatic evacuation and inflation functions through an absolute pressure sensor and a pressure display instrument, eliminating the need for users to manually disconnect the evacuation and inflation switches by observing the pressure gauge; by adding an electric high-vacuum pressure reducing valve between the evacuation / inflation pressure and the vacuum pressure of the inertial platform, the inflation pressure can be adjusted on the one hand, and the gas pressure inside the inertial platform can be kept stable when the inflation valve is disconnected, reducing the impact of the inflation valve disconnection on the inflation accuracy; by adjusting the upstream inflation pressure value, high-precision control of the nitrogen pressure inside the inertial platform can be achieved. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is an external view of the inertial platform inflation / deflation device of the present invention;

[0025] Figure 2 This is a schematic diagram of the nitrogen cylinder structure of the present invention;

[0026] Figure 3 This is a block diagram of the device structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the measurement and control system of the present invention;

[0028] Figure 5 for Figure 4 Partial diagram Figure 1 ;

[0029] Figure 6 for Figure 4 Partial diagram Figure 2 .

[0030] Attached reference numerals: 1. Display control panel; 101. Vacuum indicator; 102. Pumping / filling pressure indicator; 103. Nitrogen cylinder pressure indicator; 104. Pumping indicator light; 105. Pumping complete indicator light; 106. Filling indicator light; 107. Filling complete indicator light; 108. Power indicator light; 109. Main power switch; 110. Filling switch; 111. Pumping switch; 112. Precision pressure gauge; 113. Precision throttle valve; 114. Buzzer; 115. Silencer switch; 2. Nitrogen cylinder cabinet; 201. Nitrogen cylinder; 202. Cylinder switch; 203. Cylinder pressure regulating switch; 204. Outlet pipe pressure gauge; 205. Nitrogen cylinder pressure gauge; 206. Outlet pipe; 100. Display control panel; 200. Nitrogen cylinder cabinet. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below.

[0032] like Figures 1 to 6 As shown, a high-precision automatic inflation / deflation device for an inertial platform includes:

[0033] Display control panel 100, facilitating manual operation of the screen;

[0034] Nitrogen cylinder cabinet 200, used to store nitrogen cylinders at their outlet pressure;

[0035] The nitrogen cylinder cabinet 200 includes two sets of nitrogen cylinders 201, a nitrogen cylinder pressure reducing valve, a pressure sensor, a solenoid valve A, a precision filter, a nitrogen cylinder precision pressure reducing valve, a precision throttle valve, a solenoid valve B, an absolute pressure sensor, an electric high vacuum pressure reducing valve, a solenoid valve C located downstream of solenoid valve B and connected in series with the absolute pressure sensor, a vacuum pump connected to solenoid valve C, and an electric high vacuum pressure reducing valve controller connected to the electric high vacuum pressure reducing valve.

[0036] By adding a precision filter after nitrogen cylinder 201, minute impurities that may exist inside nitrogen cylinder 201 are filtered out, reducing the risk of impurities entering the inertial platform and causing product damage.

[0037] The pressure of nitrogen cylinder 201 is reduced by a multi-stage pressure reducing valve, and the inflation speed is controlled by a precision throttle valve 113 to prevent excessive pressure during inflation from causing injury to personnel or products.

[0038] By adding an electric high-vacuum pressure reducing valve between the inflation pressure and the vacuum pressure of the inertial platform, the inflation pressure can be adjusted, and the gas pressure inside the inertial platform can be kept stable when the inflation valve is disconnected, reducing the impact of the inflation valve disconnection on the inflation accuracy. By adjusting the upstream inflation pressure value, high-precision control of nitrogen pressure inside the inertial platform can be achieved.

[0039] Automatic air extraction and inflation functions are achieved through an absolute pressure sensor and pressure display instrument, eliminating the need for users to manually disconnect the air extraction and inflation switch by observing the pressure gauge.

[0040] The display control panel 100 includes a vacuum indicator 101, a vacuum / filling pressure indicator 102, a nitrogen cylinder pressure indicator 103, a vacuum indicator 104, a vacuum-to-complete indicator 105, a filling indicator 106, a filling-to-complete indicator 107, a power indicator 108, a main power switch 109, a filling switch 110, a vacuum switch 111, a precision pressure gauge 112, a precision throttle valve 113, a buzzer 114, and a silencer switch 115.

[0041] Two sets of nitrogen cylinders are used to fill the inertial platform and serve as backup nitrogen cylinders. The pressure reducing valve is equipped with an outlet pressure gauge 204 and a nitrogen cylinder pressure gauge 205, which are used to monitor the nitrogen cylinder pressure and the filling outlet pressure, respectively. The outlet pressure is adjusted by the cylinder pressure regulating switch on the pressure reducing valve.

[0042] The vacuum pump described is a two-stage rotary vane vacuum pump, which, while meeting the requirements for pumping speed and ultimate vacuum, features low power consumption, low noise, reliable operation, and simple maintenance.

[0043] The nitrogen cylinder 201 is equipped with a cylinder switch 202 and a cylinder pressure regulating switch 203, an outlet pipe pressure gauge 204 and a nitrogen cylinder pressure gauge 205 respectively installed on the cylinder pressure regulating switch 203 for monitoring the pressure of the nitrogen cylinder 201 and the filling and outlet pressure, and an outlet pipe 206 connected to the cylinder pressure regulating switch 203.

[0044] The nitrogen cylinder outlet pressure is accurately detected by the pressure sensor on the pipeline. When the pressure displayed by the nitrogen cylinder pressure display instrument 103 is greater than 0.5 MPa or less than 0.1 MPa, the pressure value can be adjusted as needed. The equipment will then disconnect from the gas filling and charging operation and issue an alarm signal to indicate that the gas supply pressure is out of tolerance and needs to be readjusted.

[0045] The electric high vacuum pressure reducing valve controller includes an automatic fuse SB and a fuse BXL that automatically disconnect the equipment power supply when the current is too high; an AC contactor K2 that disconnects the pumping and charging power supply when the outlet pressure of nitrogen cylinder 201 is too high or too low; a buzzer A and a buzzer control switch K7 that issue overpressure / insufficient pressure alarms; a main power switch SB1 that connects and disconnects the equipment pumping and charging power supply; pressure displays XMT1 to XMT3 for pumping and charging pressure detection; absolute pressure sensors 1 to 3; a temperature controller KT for detecting the equipment ambient temperature; a solenoid valve YA for controlling the nitrogen cylinder outlet pipeline switch; a solenoid valve YB for controlling the pumping and charging pipeline switch; a solenoid valve YC for controlling the vacuum pump pipeline switch; a time delay relay K3 for delaying the disconnection of the vacuum pump; a charging switch K5; a pumping switch K6; an electric high vacuum pressure reducing valve controller KZQ; and a vacuum pressure reducing valve control switch K4.

[0046] The pressure display instruments XMT1 to XMT3, combined with absolute pressure sensors 1 to 3, are used for detecting the pressure of the pumping and filling system, the pressure of the inertial platform, and the pressure of the nitrogen cylinder, respectively.

[0047] The vacuum pressure reducing valve control switch K4 is used to connect the vacuum pressure reducing valve controller and control the operation of the electric vacuum pressure reducing valve.

[0048] The absolute pressure sensor 1 is used to detect the pumping and inflation pressures and displays them on the display control panel 100. When the inflation reaches a certain pressure value, the display control panel 100 outputs an inflation disconnect signal to control the solenoid valve A to disconnect the inflation pipeline.

[0049] Nitrogen gas from nitrogen cylinder 201 passes through solenoid valve A and then through a precision filter to remove any minute impurities that may be present in nitrogen cylinder 201. The nitrogen gas then passes through a precision pressure reducing valve in nitrogen cylinder 201 again to reduce the inflation pressure to within 0.5 bar. At this point, the inflation speed of the inertial platform can be controlled by a precision throttle valve to prevent excessive inflation speed and pressure from damaging the product or equipment and causing injury to personnel or products.

[0050] The electric high-vacuum pressure reducing valve is used to regulate the inflation pressure and to ensure that the pressure inside the inertial platform is stable when the inflation / exhaust valve is disconnected, thus reducing the impact of the disconnection of the inflation / exhaust valve on the pressure inside the inertial platform.

[0051] Absolute pressure sensor 2 is used to detect the internal pressure of the inertial platform and displays it through vacuum pressure display instrument 102. Vacuum pressure display instrument 102 also outputs a vacuum signal after vacuuming to a certain pressure value, controlling solenoid valve A to disconnect the vacuum pipeline and shut down the vacuum pump.

[0052] Automatic fuses SB and BXL are used to automatically disconnect the power supply to the equipment when the current is too high, preventing damage to the equipment.

[0053] The AC contactor K2 is used to disconnect the gas pumping and filling power supply when the outlet pressure of nitrogen cylinder 201 is too high or too low. At this time, the buzzer control switch K7 does not work, and the buzzer A works to issue an overpressure / insufficient pressure alarm. When the outlet pressure of nitrogen cylinder 201 is normal, the AC contactor K2 works, the buzzer control switch K7 works, and the buzzer is disconnected.

[0054] The temperature controller KT is used to detect the ambient temperature of the equipment. When the ambient temperature is too low, the vacuum switch is turned off to prevent damage to the vacuum pump at low temperatures.

[0055] The time delay relay K3 is used to disconnect the vacuum pump 10 seconds after the vacuum is reached, ensuring that the inertial platform is evacuated more thoroughly.

[0056] A method for pumping and filling a high-precision automatic inertial platform air pumping and filling device, the specific steps of which are as follows:

[0057] Step 1: Adjust the pressure: Turn on the automatic fuse SB, the buzzer A will sound an alarm, turn on the nitrogen cylinder switch 202, adjust the cylinder pressure regulating switch 203 so that the nitrogen cylinder pressure display 103 on the display control panel 100 is between 0.1MPa and 0.5MPa, the buzzer A will stop sounding an alarm, and the pre-start preparation work is completed.

[0058] Step 2: Vacuuming: Close the main power switch 109 on the display control panel 100, close the vacuum switch 111, the vacuum indicator light 104 on the panel will light up, the vacuum pump will start working, and the inertial platform will begin to be vacuumed. When the vacuum pressure display instrument 102 shows that the pressure is less than the set pressure of 3 kPa, the vacuum indicator light 105 will light up. After the equipment automatically delays for 10 seconds, the vacuum pump will stop working. At this time, the vacuum indicator light 104 will go out, and the vacuum switch 111 will be turned off.

[0059] Step 3: Nitrogen filling: Close the nitrogen filling switch 110, the nitrogen filling indicator light 106 will light up, and the nitrogen filling of the inertial platform will begin;

[0060] Step 4: Improve the nitrogen purity in the inertial platform: Repeat steps S2 and S3 2 to 3 times, and select one time to evacuate and use the static pressure boosting method to measure the leakage rate of the inertial platform. When the indicator light 105 is lit after evacuation, start the leakage rate test. If the pressure change displayed by the vacuum degree display instrument 101 is not greater than the maximum value of the equipment leakage rate within 2 hours, it is qualified. The equipment leakage rate is ≤3.0x10-4 KPa·L / S.

[0061] In step S3, when the pressure displayed by the pumping and inflation pressure display 102 reaches the set inflation pressure, that is, the nitrogen pressure in the inertial platform is 95.3KPa±3Kpa, inflation will automatically stop by adjusting the inflation pressure set value of the pumping and inflation pressure display 102. At this time, the inflation indicator 106 will turn off, the inflation indicator 107 will turn on, and the inflation switch 110 will be turned off.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision inertial platform automatic air pumping and filling device, characterized in that: include: Display control panel (100) for easy manual operation of the screen; Nitrogen cylinder cabinet (200), used to store nitrogen gas at its outlet pressure; The nitrogen cylinder cabinet (200) includes two sets of nitrogen cylinders (201), a nitrogen cylinder pressure reducing valve, a pressure sensor, a solenoid valve A, a precision filter, a nitrogen cylinder precision pressure reducing valve, a precision throttle valve, a solenoid valve B, an absolute pressure sensor, an electric high vacuum pressure reducing valve, a solenoid valve C located after the solenoid valve B and connected in series with the absolute pressure sensor, a vacuum pump connected to the solenoid valve C, and an electric high vacuum pressure reducing valve controller connected to the electric high vacuum pressure reducing valve. The electric high vacuum pressure reducing valve controller includes an automatic fuse SB and a fuse BXL that automatically disconnect the power supply to the equipment when the current is too high; an AC contactor K2 that disconnects the pumping and charging power supply when the outlet pressure of the nitrogen cylinder (201) is too high or too low; a buzzer A and a buzzer control switch K7 that issue overpressure / underpressure alarms; a main power switch SB1 for connecting and disconnecting the pumping and charging power supply to the equipment; pressure displays XMT1 to XMT3 for detecting pumping and charging pressure; absolute pressure sensors 1 to 3; a temperature controller KT for detecting the ambient temperature of the equipment; and a switch control for controlling the outlet pipeline of the nitrogen cylinder. The system includes a solenoid valve YA for controlling the gas filling / vacuuming pipeline switch, a solenoid valve YB for controlling the vacuum pumping pipeline switch, a time-delay relay K3 for delaying the disconnection of the vacuum pump, a gas filling switch K5, a gas evacuation switch K6, an electric high-vacuum pressure reducing valve controller KZQ, and a vacuum pressure reducing valve control switch K4. The pressure displays XMT1-XMT3, combined with absolute pressure sensors 1-3, are used for gas filling / vacuuming pressure detection, inertial platform pressure detection, and nitrogen cylinder pressure detection, respectively. The vacuum pressure reducing valve control switch K4 is used to connect the vacuum pressure reducing valve controller, controlling the operation of the electric vacuum pressure reducing valve.

2. The high-precision inertial platform automatic inflation / deflation device according to claim 1, characterized in that: The display control panel (100) includes a vacuum indicator (101), a gas filling pressure indicator (102), a nitrogen cylinder pressure indicator (103), a gas filling indicator (104), a gas filling indicator (105), a gas filling indicator (106), a gas filling indicator (107), a power indicator (108), a main power switch (109), a gas filling switch (110), a gas filling switch (111), a precision pressure gauge (112), a precision throttle valve (113), a buzzer (114), and a silencer switch (115).

3. The high-precision automatic inflation / deflation device for an inertial platform according to claim 1, characterized in that: The two sets of nitrogen cylinders are used to fill the inertial platform and as backup nitrogen cylinders, respectively.

4. The high-precision inertial platform automatic inflation / deflation device according to claim 1, characterized in that: The vacuum pump mentioned is a two-stage rotary vane vacuum pump.

5. The high-precision automatic inflation / deflation device for an inertial platform according to claim 1, characterized in that: The nitrogen cylinder (201) is equipped with a cylinder switch (202) and a cylinder pressure regulating switch (203), an outlet pipe pressure gauge (204) and a nitrogen cylinder pressure gauge (205) respectively installed on the cylinder pressure regulating switch (203) for monitoring the pressure of the nitrogen cylinder (201) and the filling and outlet pressure, and an outlet pipe (206) connected to the cylinder pressure regulating switch (203).

6. A method for pumping and filling an inertial platform using any one of claims 1 to 5, characterized in that: The specific steps are as follows: Step 1, Adjust the pressure: Connect the automatic fuse SB, the buzzer A will start the alarm, open the gas cylinder switch (202) of the nitrogen cylinder, adjust the gas cylinder pressure regulating switch (203) so that the reading of the nitrogen cylinder pressure display instrument (103) on the display control panel (100) is between 0.1MPa and 0.5MPa, the buzzer A will stop the alarm, and the pre-start preparation work is completed; Step 2: Vacuuming: Close the main power switch (109) on the display control panel (100), close the vacuum switch (111), the vacuum indicator light (104) on the panel will light up, the vacuum pump will work, and the inertial platform will be evacuated. When the pressure displayed by the vacuum pressure display instrument (102) reaches the set pressure < 3KPa, the vacuum indicator light (105) will light up. After the equipment automatically delays for 10 seconds, the vacuum pump will stop working. At this time, the vacuum indicator light (104) will go out, and the vacuum switch (111) will be turned off. Step 3: Nitrogen filling: Close the filling switch (110), the filling indicator light (106) will light up, and nitrogen filling of the inertial platform will begin; Step 4: Improve the nitrogen purity in the inertial platform: Repeat steps S2 and S3 2 to 3 times, and select one time to vacuum and use the static pressure boosting method to measure the leakage rate of the inertial platform. When the indicator light (105) is lit after evacuation, start the leakage rate test. If the pressure change displayed by the vacuum degree display instrument (101) is not greater than the maximum value of the equipment leakage rate within 2 hours, it is qualified. The equipment leakage rate is ≤3.0x10-4 KPa·L / S.

7. The method for pumping and filling a high-precision inertial platform automatic pumping and filling device according to claim 6, characterized in that: In step S3, when the pressure displayed by the pumping and inflation pressure display (102) reaches the set inflation pressure, that is, the nitrogen pressure in the inertial platform is 95.3KPa±3Kpa, the inflation will automatically stop by adjusting the inflation pressure set value of the pumping and inflation pressure display (102). At this time, the inflation indicator (106) will turn off, the inflation indicator (107) will turn on, and the inflation switch (110) will be turned off.

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