Portable sealing position switch detection device

Abstract

The utility model provides a portable sealing position switch detection device, which comprises a box body, four measuring units and detection sockets matched with the measuring units are arranged in the box body, each measuring unit comprises two groups of measuring modules and a display early warning module, and each group of measuring module is electrically connected with the display early warning module. Each group of measurement modules comprises a constant current source sub-module, a voltage measurement sub-module and a data operation sub-module, the voltage measurement sub-module in the same group of measurement modules is used for measuring the voltage of the constant current source sub-module, and the output end of the voltage measurement sub-module is electrically connected with the input end of the data operation sub-module; and the output end of the data operation sub-module is electrically connected with the display early warning module. According to the utility model, four normally-open contacts and four normally-closed contacts in the aviation seal switch can be measured at the same time, the problem that a traditional detection method carries out manual measurement through external connection of an LED and cooperation of a three-purpose meter is solved, and the operation is more convenient and efficient.

Description

Technical Field

[0001] This utility model relates to the technical field of switch testing equipment for aviation equipment, and specifically to a portable sealed position switch testing device. Background Technology

[0002] Due to the requirements of avionics, mechanical and electrical systems, ordnance, and flight control systems, the aircraft is equipped with landing gear wheel switches (WOW), landing gear extension / retraction end switches (WU), and landing gear door end switches to provide takeoff and landing signals to various subsystems on board. Because each subsystem has a large demand for discrete takeoff and landing signals, the aircraft is equipped with multiple wheel switches and end switches to transmit a large number of signals to ensure the normal operation of each subsystem.

[0003] Currently, wheel-mounted switches, landing gear extension / retraction endpoint switches, and landing gear door endpoint switches all use aviation-grade sealed switches. The performance of these aviation-grade sealed switches directly affects flight safety, which necessitates the use of aviation-grade sealed switch testing devices to check the performance of the contact resistance of the aviation-grade sealed switches.

[0004] Before installation, after installation on the aircraft, and during periodic inspections, we need to adjust the position and travel of the aviation sealing switch and test the resistance of the switch contacts. Only after passing the tests can it be put into use.

[0005] Traditional testing methods involve manually measuring with an external LED and a multimeter. Since the sealed switch contains four normally open and four normally closed signals, each switch requires eight measurements to complete the test. Furthermore, manual testing with a multimeter suffers from low accuracy and large errors due to probe contact resistance. The process is cumbersome, inconvenient, and time-consuming. This is highly detrimental to rapid, portable support operations in aircraft field settings. Therefore, there is an urgent need to develop a testing device for aviation sealed switches to meet these requirements. Utility Model Content

[0006] In view of this, the present invention provides a portable sealed position switch detection device, which can simultaneously measure the four normally open and four normally closed contacts inside the aviation sealed switch without the need for the operator to perform multiple measurements with a multimeter, resulting in higher detection accuracy and more convenient and efficient operation.

[0007] To solve the above-mentioned technical problems, this utility model provides a portable sealed position switch detection device, including a housing. The housing is made of PP plastic with an IP67 waterproof rating. The housing contains four measuring units and corresponding detection sockets. The detection sockets use aviation electrical connectors from aviation beacons, model number JY27656T11B35SN, which is consistent with the model used in aircraft. Each measuring unit includes two sets of measuring modules and a display and warning module.

[0008] The measurement module and display and warning module of each group are electrically connected. Each measurement module includes a constant current source submodule, a voltage measurement submodule and a data processing submodule.

[0009] The voltage measurement submodule in the same group of measurement modules is used to measure the voltage of the constant current source submodule;

[0010] The output terminal of the voltage measurement submodule is electrically connected to the input terminal of the data processing submodule, and the output terminal of the data processing submodule is electrically connected to the display and warning module.

[0011] Within the same set of measurement units, the first interface of the detection socket is electrically connected to the input terminals of two constant current source submodules, the output terminal of one set of constant current source submodules is electrically connected to the second interface of the detection socket, the output terminal of the other set of constant current source submodules is electrically connected to the third interface of the detection socket, and the remaining three sets of measurement units are all electrically connected to the other interfaces of the detection socket using the same connection method.

[0012] The display warning module includes an indicator light alarm module electrically connected to one of the output terminals of the data processing submodule, an LED digital tube driver module electrically connected to the other output terminal of the data processing submodule, and a four-digit LED digital tube electrically connected to the LED digital tube driver module.

[0013] The enclosure also houses a lithium battery pack and a charging module. The lithium battery pack consists of four aviation-grade 1800mAh, 20.0Wh 12V rechargeable lithium-ion batteries. Each lithium battery is electrically connected to a set of measurement units. The charging module is electrically connected to the lithium battery pack and is used to provide charging power to the lithium battery pack. It transforms, rectifies, filters, and regulates the input 220V AC power internally to output 12.6V DC power, which then supplies charging power to the lithium battery pack inside the device.

[0014] The enclosure is also equipped with a voltmeter for real-time monitoring of the lithium battery pack voltage. The voltmeter is a digital high-precision voltmeter.

[0015] The enclosure is also equipped with a switch for controlling the operation of the lithium battery pack and charging module. The switch is an aviation-grade six-pin three-position rocker switch with three working states: on, off, and charging.

[0016] The indicator alarm module includes built-in red and green LEDs.

[0017] The four-digit LED digital tube is a four-digit 0.56-inch common anode high-brightness red digital tube, with a maximum display value of 19.99.

[0018] The enclosure also houses a DC-DC isolation voltage regulator module. The input of the DC-DC isolation voltage regulator module is electrically connected to the output of the lithium battery pack, and the output of the DC-DC isolation voltage regulator module is electrically connected to the measurement module and the display and warning module.

[0019] The interior of the enclosure is also equipped with an operation display panel, which is made of galvanized steel plate. The operation display panel has a quick-opening battery compartment and a connecting cable storage compartment. The operation display panel is also designed with serial numbers for identifying the internal contacts of the aviation sealed switch. The four-digit LED digital tube and indicator alarm module correspond one-to-one with the internal contacts and serial numbers of the aviation sealed switch.

[0020] The box uses a push-button buckle to prevent accidental opening from falling, and a manually adjustable air valve is also provided on the box.

[0021] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0022] 1. This utility model can provide power to four measuring units via a lithium battery pack, and can simultaneously measure the four normally open and four normally closed contacts inside the aviation sealed switch through the four measuring units. This makes operation more convenient and efficient, solving the problem of traditional testing methods that rely on external LEDs and manual measurement with a multimeter. Because the sealed switch contains four normally open and four normally closed signals, each test requires eight measurements to complete. Furthermore, manual testing with a multimeter suffers from low accuracy and large errors due to probe contact resistance, and the testing process is cumbersome, inconvenient, and time-consuming.

[0023] 2. This utility model can realize the quick installation and replacement of lithium battery packs through the quick-opening battery compartment and connecting cable storage compartment set on the operation panel. Moreover, the connecting cable storage compartment can realize the storage and retrieval of connecting cables, which greatly increases the overall portability of the testing device.

[0024] 3. This utility model can use red and green LEDs to detect the fault location of the sealed position switch during the detection process, making it clearer and easier for the tester to quickly identify the fault location, thus greatly improving the efficiency of subsequent maintenance.

[0025] 4. This utility model can charge the lithium battery pack through the charging module. The electrical energy stored in the lithium battery pack can provide continuous power to the detection device in the event of a power outage or when there is no power source outdoors, which greatly improves the portability of the detection device and makes the operation more efficient and convenient. Attached Figure Description

[0026] Figure 1 The circuit diagram shows the internal detection principle of the portable sealed position switch detection device of this utility model.

[0027] Figure 2 This is a top view of the housing and operation display panel of the portable sealed position switch detection device of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal workings of the aviation sealed switch of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 100, enclosure; 200, measurement unit; 210, measurement module; 211, constant current source submodule; 212, voltage measurement submodule; 213, data processing submodule; 220, display and warning module; 221, indicator light alarm module; 2211, red LED; 2212, green LED; 222, LED digital tube driver module; 223, four-digit LED digital tube; 230, DC-DC isolation voltage regulator module; 300, detection socket; 301, first interface; 302, second interface; 303, third interface; 400, charging module; 500, lithium battery pack; 600, voltmeter; 700, selector switch; 800, operation display panel; 801, quick-opening battery compartment; 802, connecting cable storage compartment; 803, serial number. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0031] like Figure 1-3As shown: This embodiment provides a portable sealed position switch detection device, including a housing 100. The housing 100 is a PP plastic IP67 waterproof safety box. The housing 100 has four measuring units 200 and a corresponding detection socket 300. The detection socket 300 uses aviation electrical connectors from Aviation Standard, model JY27656T11B35SN, which is consistent with the model used in aircraft. This ensures reliable plug contact, a large electrical contact area, and negligible resistance.

[0032] Each measurement unit 200 includes two sets of measurement modules 210 and a display and warning module 220. The measurement modules 210 and the display and warning module 220 in each set are electrically connected. Each set of measurement modules 210 includes a constant current source submodule 211, a voltage measurement submodule 212, and a data processing submodule 213. The voltage measurement submodule 212 in the same set of measurement modules 210 is used to measure the voltage of the constant current source submodule 211. The output terminal of the voltage measurement submodule 212 is electrically connected to the input terminal of the data processing submodule 213. The output terminal of the data processing submodule 213 is electrically connected to the display and warning module 220.

[0033] Within the same set of measurement units 200, the first interface 301 of the detection socket is electrically connected to the input terminals of two constant current source submodules 211, respectively. The output terminal of one set of constant current source submodules 211 is electrically connected to the second interface 302 of the detection socket 300, and the output terminal of the other set of constant current source submodules 211 is electrically connected to the third interface 303 of the detection socket 300. The remaining three sets of measurement units 200 are all electrically connected to the other interfaces of the detection socket 300 using the same connection method. The detection socket has multiple sets of three-interfaces internally. In this invention, when testing the performance of the sealed position switch, four sets of three-interfaces are used. The specific connection method is as follows.

[0034] The connection method between the first measuring unit and the first group of three interfaces of the detection socket is as follows: the input terminals of the two constant current source submodules 211 in the first measuring unit are electrically connected to the first interface 301 of the first group of three interfaces in the detection socket 300; the output terminal of the constant current source submodule 211 in one group is electrically connected to the second interface 302 of the first group of three interfaces in the detection socket 300; and the output terminal of the constant current source submodule 211 in the other group is electrically connected to the third interface 303 of the first group of three interfaces in the detection socket 300.

[0035] The connection method between the second measuring unit and the second group of three interfaces of the detection socket is as follows: the input terminals of the two constant current source submodules 211 in the second measuring unit are electrically connected to the first interface 301 of the second group of three interfaces in the detection socket 300; the output terminal of the constant current source submodule 211 in one group is electrically connected to the second interface 302 of the second group of three interfaces in the detection socket 300; and the output terminal of the constant current source submodule 211 in the other group is electrically connected to the third interface 303 of the second group of three interfaces in the detection socket 300.

[0036] The connection method between the third measuring unit and the third group of three interfaces of the detection socket is as follows: the input terminals of the two constant current source sub-modules 211 in the third measuring unit are electrically connected to the first interface 301 of the third group of three interfaces in the detection socket 300; the output terminal of the constant current source sub-module 211 in one group is electrically connected to the second interface 302 of the third group of three interfaces in the detection socket 300; and the output terminal of the constant current source sub-module 211 in the other group is electrically connected to the third interface 303 of the third group of three interfaces in the detection socket 300.

[0037] The connection method between the fourth measuring unit and the fourth group of three interfaces of the detection socket is as follows: the input terminals of the two constant current source submodules 211 in the fourth measuring unit are electrically connected to the first interface 301 of the fourth group of three interfaces in the detection socket 300; the output terminal of the constant current source submodule 211 in one group is electrically connected to the second interface 302 of the fourth group of three interfaces in the detection socket 300; and the output terminal of the constant current source submodule 211 in the other group is electrically connected to the third interface 303 of the fourth group of three interfaces in the detection socket 300.

[0038] The measurement module 210 uses a four-wire measurement method to measure resistance with an accuracy of up to 0.01Ω and a test speed of 3 times / second. It transmits the measurement results to the LED digital tube driver module 222 and the indicator alarm module 221 in real time. The LED digital tube driver module 222 receives the data signal from the measurement module 210, converts it into four-channel level signals, and drives the four-digit LED digital tube 223 to display the measured resistance value. The indicator alarm module 221 is driven by the measurement module 210 to light up or turn off, which makes it easier for maintenance personnel to find the corresponding fault location in time and facilitates subsequent maintenance and replacement work, greatly improving the efficiency of detection and maintenance.

[0039] According to another embodiment of the present invention, such as Figure 1 and Figure 2As shown, the display warning module 220 includes an indicator light alarm module 221 electrically connected to one of the output terminals of the data processing submodule 213, an LED digital tube driver module 222 electrically connected to the other output terminal of the data processing submodule 213, and a four-digit LED digital tube 223 electrically connected to the LED digital tube driver module 222. The four-digit LED digital tube 223 is a four-digit 0.56-inch common anode high-brightness red digital tube with a maximum display of 19.99. The purpose of selecting LED digital tubes is that they have high brightness, clear display, and good effect.

[0040] According to another embodiment of the present invention, such as Figure 2 and Figure 3 As shown, the housing 100 also houses a lithium battery pack 500 and a charging module 400. The lithium battery pack consists of four aviation-grade 1800mAh, 20.0Wh 12V rechargeable lithium-ion batteries. Each lithium battery is electrically connected to a set of measurement units. This is to ensure that each measurement unit 200 can operate normally without interference, preventing the power supply positive and negative terminals of each measurement module 210 from interconnecting due to the four measurement units 200 sharing a single lithium battery, thus avoiding mutual interference that could affect the measurement results. The charging module 400 is electrically connected to the lithium battery pack 500 and provides charging power to the lithium battery pack 500. It transforms, rectifies, filters, and regulates the input 220V AC power internally to output 12.6V DC power, which then supplies charging power to the lithium battery pack 500 inside the device.

[0041] The enclosure 100 is also equipped with a voltmeter 600 for real-time monitoring of the voltage of the lithium battery pack 500. The voltmeter 600 is a digital display high-precision voltmeter 600, used to monitor the voltage of the lithium battery pack 500 in real time to ensure the stable and normal operation of the working voltage.

[0042] The housing 100 is also equipped with a changeover switch 700 for controlling the operation of the lithium battery pack 500 and the charging module 400. The changeover switch is an aviation-grade six-pin three-position rocker switch with three working states: on, off, and charging. The aviation-grade six-pin three-position rocker switch has the advantages of long service life and high safety and reliability.

[0043] The indicator light alarm module 221 includes a built-in red LED 2211 and a green LED 2212.

[0044] The housing 100 also houses a DC-DC isolation voltage regulator module 230, which is electrically connected to the lithium battery pack 500. This module isolates the positive and negative terminals of the DC power supplied by the lithium battery pack 500. The voltage regulator circuit converts the isolated 12V DC power into a stable 5V DC power, which is then supplied to the measurement module 210, the four-digit LED digital tube 223, the LED digital tube driver module 222, and the indicator light alarm module 221. When the aviation-grade sealed position switch is connected to the third interface 303 of the detection socket 300, the performance of one of the contact resistors of the aviation-grade sealed switch can be tested. When the aviation-grade sealed position switch is connected to the second interface 302 of the detection socket 300, the performance of the other contact resistor can be tested. The performance testing principle of the aviation-grade sealed position switch is as follows:

[0045] like Figure 1 As shown, when the plug of the aviation sealing switch is connected to the detection socket 300 of the device, the four power lines ABCD of the measurement module 210 are connected to the corresponding set of contacts inside the aviation sealing switch. First, the constant current generated by the constant current source submodule 211 inside the measurement module 210 is output from pin A to pin 3 of the sealing switch, passes through the internal closed contact to pin 1, returns to pin D, and finally returns to the constant current source, forming a closed loop. A constant current flows through this closed loop. Due to the contact resistance of the contacts inside the sealing switch, a voltage drop is generated across the contacts. Then, pins B and C of the voltage measurement submodule 212 inside the measurement module 210 are connected to pins 3 and 1 of the sealing switch to directly measure the voltage drop of the corresponding contacts inside the sealing switch. Then, the data processing submodule 213 inside the measurement module 210 performs calculations based on the constant current value output by the constant current source and the voltage value measured by the voltage measurement submodule 212, and calculates the contact resistance value of the corresponding contacts inside the sealing switch according to Ohm's law. (The four-wire measurement method allows for the separation and independent measurement of current and voltage. Since the two electrodes are completely independent, the AD group only provides the constant current source (input current), while the BC group only measures voltage. The current-measuring wires and the contacts inside the position switch will generate a voltage drop, but this voltage drop is outside the measurement range and will not affect the measurement results. For voltage measurement in the BC group, the input impedance is extremely high, and the current flowing through it is almost zero, having virtually no impact on measurement accuracy. Then, by applying Ohm's law to the measured voltage value and the current value provided by the constant current source, an accurate resistance value can be obtained.)

[0046] Finally, the measurement module 210 transmits the calculated resistance value signal to the LED digital tube driver module 222 and the indicator light alarm module 221. According to the performance requirements of the aviation sealed switch, we set the threshold resistance value of the contact resistance to be 0.5Ω. Therefore, when the measured contact resistance value of the contact inside the aviation sealed switch is ≤0.5Ω, the measurement module 210 will drive the indicator light alarm module 221 to light up the green LED 2212 and turn off the red LED, indicating that the contact resistance value is within the specified range and meets the performance requirements. Simultaneously, the LED digital tube driver module 222 converts the resistance value signal sent by the measurement module 210 into a level signal and drives the four-digit LED digital tube 223 to display the resistance value. When the measured contact resistance value of the contact inside the aviation sealed switch is >0.5Ω, the measurement module 210 will drive the indicator light alarm module 221 to light up the red LED and turn off the green LED 2212, indicating that the contact resistance value exceeds the specified range and does not meet the performance requirements. Meanwhile, the LED digital tube driver module 222 converts the resistance value signal sent by the measurement module 210 into a level signal and drives the four-digit LED digital tube 223 to display the resistance value.

[0047] When the internal contacts of the sealing switch change from closed to open, or the measured contact resistance exceeds the range, or the sealing switch plug is not connected to the detection socket 300, or the measuring device is in standby mode, the four-digit LED digital tube 223 displays 1 as infinity, and the red and green light-emitting diodes 2212 are both turned off.

[0048] The interior of the housing 100 also features an operation display panel 800. The operation display panel 800 is made of galvanized steel, offering high mechanical strength and a long service life. It adopts a corresponding area design, making it aesthetically pleasing. The operation display panel 800 includes a quick-opening battery compartment 801 and a cable storage compartment 802, facilitating the use of cables and battery replacement. The operation display panel 800 also features serial numbers 803 for identifying the internal contacts of the aviation-grade sealed switch. A four-digit LED digital tube 223 and an indicator light alarm module 221 correspond one-to-one with the internal contacts and serial numbers of the aviation-grade sealed switch. This not only provides a more intuitive display of the corresponding internal contacts of the aviation-grade sealed switch but also allows the operator to determine whether the internal contacts of the aviation-grade sealed switch are functioning correctly based on the illumination and deactivation of the indicator light alarm module 221.

[0049] The box 100 uses a push-button buckle to prevent accidental opening due to drops. The box 100 is also equipped with a manually adjustable air valve. This utility model can enable the top cover to be opened normally even in special high and low pressure environments through the manually adjustable air valve on the box 100.

[0050] How to use this utility model:

[0051] First, it needs to be clarified that the detection device involved in this utility model is mainly used for measuring the resistance of switch leads. This utility model takes the measurement and detection of the contact resistance of an aviation sealed switch as an example to describe its usage in detail. When it is necessary to test the contact resistance of an aviation sealed switch, the changeover switch 700 on the measuring device is switched from the off position to the on position. The internal lithium battery pack 500 then supplies power to the four measuring units 200 inside the device simultaneously. The voltmeter 600 measures and displays the real-time voltage of the lithium battery pack 500, and the measuring device is in standby mode. At this time, all eight four-digit LED digital tubes 223 should display 1 infinity, and the red LEDs and green LEDs 2212 of the eight indicator alarm modules 221 should be off. Then, the plug of the aviation sealed switch is connected to the detection socket 300 of the device.

[0052] Reference Figure 2 and Figure 3 When the position switch's push rod is extended, its internal contacts 1-2, 4-5, 7-8, and 10-11 are in the ON state, while contacts 1-3, 4-6, 7-9, and 10-12 are in the OFF state. Under normal position switch conditions, the four-digit LED display 223 on the instrument's operation display panel 800 should show a resistance value ≤0.5Ω for each contact. At this time, the green LED 2212 of the corresponding indicator alarm module 221 above should light up, while the red LED should turn off. Simultaneously, the four-digit LED display 223 on the instrument's operation display panel 800 should all display 1 (infinity), and both the green LED 2212 and the red LED of the corresponding indicator alarm module 221 above should turn off.

[0053] When the position switch lever is pressed, contacts 1-3, 4-6, 7-9, and 10-12 are closed, while contacts 1-2, 4-5, 7-8, and 10-11 are open. When the position switch is functioning correctly, the four-digit LED display 223 on the instrument's operation display panel 800 showing the corresponding contact resistance values ​​should all be ≤0.5Ω. At this time, the green LED 2212 of the corresponding indicator alarm module 221 above should light up, while the red LED should be off. Simultaneously, the four-digit LED display 223 on the instrument's operation display panel 800 showing 1 (infinity) should all display, and both the green LED 2212 and the red LED of the corresponding indicator alarm module 221 above should be off.

[0054] When any group of contacts is in the closed state, if the measured resistance value of that group is less than 19.99Ω and greater than 0.5Ω, the red LED of the corresponding indicator alarm module 221 will light up, the green LED 2212 will turn off, and the corresponding four-digit LED digital tube 223 will display the measured resistance value.

[0055] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A portable sealed position switch detection device, comprising a housing (100), characterized in that: The housing (100) is equipped with four measuring units (200) and corresponding detection sockets (300). Each measuring unit (200) includes two sets of measuring modules (210) and a display and warning module (220). The measurement module (210) and the display and warning module (220) of each group are electrically connected. Each measurement module (210) includes a constant current source submodule (211), a voltage measurement submodule (212), and a data processing submodule (213). The voltage measurement submodule (212) in the same group of measurement modules (210) is used to measure the voltage of the constant current source submodule (211); The output terminal of the voltage measurement submodule (212) is electrically connected to the input terminal of the data processing submodule (213), and the output terminal of the data processing submodule (213) is electrically connected to the display warning module (220). Within the same set of measurement units (200), the first interface (301) of the detection socket is electrically connected to the input terminals of two constant current source sub-modules (211), the output terminal of one set of constant current source sub-modules (211) is electrically connected to the second interface (302) of the detection socket (300), and the output terminal of the other set of constant current source sub-modules (211) is electrically connected to the third interface (303) of the detection socket (300). The remaining three sets of measurement units (200) are all electrically connected to the other interfaces of the detection socket (300) using this connection method.

2. The portable sealed position switch detection device as described in claim 1, characterized in that: The display warning module (220) includes an indicator light alarm module (221) electrically connected to one of the output terminals of the data processing submodule (213), an LED digital tube driver module (222) electrically connected to the other output terminal of the data processing submodule (213), and a four-digit LED digital tube (223) electrically connected to the LED digital tube driver module (222).

3. The portable sealed position switch detection device as described in claim 2, characterized in that: The housing (100) is also equipped with a lithium battery pack (500) and a charging module (400). The charging module (400) is electrically connected to the lithium battery pack (500) and is used to provide charging power to the lithium battery pack (500).

4. The portable sealed position switch detection device as described in claim 3, characterized in that: The housing (100) is also equipped with a voltmeter (600) for real-time monitoring of the voltage of the lithium battery pack (500).

5. The portable sealed position switch detection device as described in claim 4, characterized in that: The housing (100) is also equipped with a switch (700) for controlling the operation of the lithium battery pack (500) and the charging module (400).

6. The portable sealed position switch detection device as described in claim 5, characterized in that: The indicator alarm module (221) includes a built-in red LED (2211) and a green LED (2212).

7. The portable sealed position switch detection device as described in claim 6, characterized in that: The four-digit LED digital tube (223) is a four-digit 0.56-inch common anode high-brightness red digital tube.

8. The portable sealed position switch detection device as described in claim 7, characterized in that: The housing (100) is also equipped with a DC-DC isolation voltage regulator module (230). The input terminal of the DC-DC isolation voltage regulator module (230) is electrically connected to the output terminal of the lithium battery pack (500), and the output terminal of the DC-DC isolation voltage regulator module (230) is electrically connected to the measurement module (210) and the display and warning module (220).

9. The portable sealed position switch detection device as described in claim 8, characterized in that: The interior of the housing (100) is also provided with an operation display panel (800), which has a quick-opening battery compartment (801) and a connecting wire storage compartment (802). The operation display panel (800) is also designed with serial numbers (803) for identifying the internal contacts of the aviation sealed switch.

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