Antenna liquid leakage evaluation and protection method based on cable sensor

Abstract

The invention provides an antenna liquid leakage evaluation and protection method based on a cable sensor, and the method comprises the steps: employing the sensing information of the cable type liquid leakage sensor to evaluate the non-leakage state, the leakage state 1, the leakage state 2 and the leakage state 3 in an antenna, and automatically cutting off the supply of cooling liquid for the leakage state 2 and the leakage state 3. A protective measure of switching off a main power supply signal of the antenna and switching on a drain valve to drain liquid is given out, so that leaked cooling liquid is prevented from accumulating to submerge an antenna functional circuit and damage the antenna functional circuit. According to the method, various conditions of cooling liquid leakage in the antenna are considered: in a leakage state 1, possible risk module positioning is evaluated according to sensing information, and a maintenance suggestion is given; and timely liquid cut-off, power cut-off and liquid drainage measures are taken in the leakage state 2 and the leakage state 3. According to the invention, the maintenance work intensity of workers is effectively reduced, the maintenance work efficiency is improved, the risk of antenna damage caused by liquid cooling leakage is reduced, and the working safety and reliability of the liquid cooling antenna array are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic information equipment health management. Background Art

[0002] With the development of semiconductor technology, the power density of microelectronic circuits is getting higher and higher. In order to meet the requirements of high performance and high power of active array antennas, an integrated design is often adopted, the structural size is getting smaller and smaller, and its power density is getting higher and higher. In order to ensure the stable and reliable operation of the active antenna array, liquid cooling is often used for forced cooling of the antenna (CN202210706015.4). There are complex circuits and liquid circuits inside the active antenna array, and a closed design is often adopted. Once the liquid in the pipeline leaks and the leakage cannot be discovered and handled in time, the leakage will cause contamination or corrosion of the optoelectronic interface, cables, circuits and other components inside the antenna. This will affect the normal functioning of its original function, or even damage it, resulting in degradation or failure of the antenna performance. Existing patents (CN202011046483.0, CN202210619743.1, CN201910155395.5, etc.) can perform leakage detection and alarm, but cannot distinguish between small and continuous or large leakage states, nor do they provide more sophisticated corresponding disposal methods or measures to ensure the safe use of active antenna arrays. Summary of the invention

[0003] To solve the above problems, the present invention proposes an antenna leakage assessment and protection method based on a cable sensor. Without opening the sealed housing of the antenna array, the sensor information of the cable-type leakage sensor is used to assess the four states of no leakage in the antenna, leakage state 1, leakage state 2 and leakage state 3. For leakage state 2 and leakage state 3, protective measures are automatically taken to cut off the coolant supply, send a signal to shut down the main power supply of the antenna, and open the drain valve to drain the liquid, so as to prevent the leakage coolant from accumulating and flooding the antenna functional circuit and causing damage to it. It effectively reduces the risk of using liquid-cooled antenna arrays, reduces maintenance time and cost, and improves the safety and reliability of antenna array operation.

[0004] To achieve the above object, the present invention proposes an antenna leakage assessment and protection method based on a cable sensor, which is implemented by the following scheme:

[0005] The antenna structure is divided into an antenna front cabin and an antenna rear cabin, which is a closed environment, wherein the antenna rear cabin includes a skeleton shell, a frame plug-in box, a liquid cooling pipe, an integrated cable, a power supply module, a transceiver module, a beam synthesis and control module, and a cooling monitoring unit. The frame plug-in box is placed in the skeleton shell, and the power supply module, the transceiver module, and the beam synthesis and control module are plug-in box structures, which are blindly connected with the integrated wiring harness connector and the water connector through the guide slot of the bottom plate of the frame plug-in box; the antenna power supply is divided into two independent parts: one is the main power supply provided by the power supply module to each module except the cooling monitoring unit, and the other is the auxiliary power supply provided to the cooling monitoring unit alone; the liquid cooling pipe is the antenna array Provide cooling medium, connected to external pipes through inlet and return pipe interfaces, and connect blind plug water connectors to return and inlet pipes through hoses; cooling monitoring unit includes control and protection module, cable leakage sensor, main control solenoid valve, drain solenoid valve, pressure relief solenoid valve, dehumidification device; control and protection module of cooling monitoring unit realizes leakage status monitoring through leakage sensor, and automatically takes protective measures; a liquid collecting guide groove is provided at the bottom of antenna rear cabin, and coolant is collected by gravity in case of leakage, the bottom of guide groove is connected to drain pipe, the drain pipe is directly connected to drain port, and leakage sensor cable is placed at the bottom of guide groove; leakage monitoring design method is realized according to the following steps:

[0006] Step 1: The antenna cooling monitoring unit is powered on, the dehumidifier is working, and the external environmental control equipment provides cooling liquid to the antenna;

[0007] Step 2: Power on the main parts of the device except the antenna and make them work normally;

[0008] Step 3: The control and protection module of the cooling monitoring unit periodically obtains the monitoring information of the leakage sensor and the monitoring information of the dehumidification device through the bus;

[0009] Step 4: The control and protection module of the cooling monitoring unit evaluates and gives four leakage states in the antenna according to the leakage monitoring information obtained: no leakage, leakage state 1, leakage state 2, and leakage state 3, and sends them to the BIT unit of the equipment at a regular time;

[0010] Step 5: In the case of no leakage, the cooling monitoring unit control and protection module provides the equipment with permission to power on the antenna main power supply; in the case of leakage state 1, the cooling monitoring unit control and protection module provides leakage location information and provides the equipment with permission to power on the antenna main power supply, and the on-site staff determines whether maintenance work needs to be carried out immediately; in the case of leakage state 2 and leakage state 3, go to step 8;

[0011] Step 6: Obtain the antenna main power supply power-on permission and, if the conditions for other antenna main power supplies to be powered on are met at the same time, the device allows the antenna main power supply to be powered on;

[0012] Step 7: After receiving permission from the device to power on the antenna main power supply, power on the antenna main power supply if it is not powered on, and continue to power on if it is powered on. The antenna works normally, and then go to step 3, and repeat the cycle until the cooling monitoring unit power supply is turned off;

[0013] Step 8: The control and protection module initiates emergency measures and waits for the on-site staff to initiate the maintenance work procedure. After the maintenance is completed, the cooling monitoring unit power is reset or turned off, and go to step 1 as needed.

[0014] Preferably, the leakage state 1, leakage state 2, and leakage state 3 states refer to setting the calibration period T, the leakage state 2 distance change threshold Y1, the large number of continuous leakage distance change threshold Y2, and the minimum distance Y3 of the leakage point through the cooling monitoring unit control and protection module, and conducting the judgment according to the following conditions: the calibration period T refers to the timing starting from any leakage event and ending at time T; within the calibration period T, if there is no continuous decrease in the leakage positioning distance or the distance change value of the continuous decrease in the leakage positioning distance is less than Y1, it is judged to be leakage state 1; within the calibration period T, if the leakage positioning distance continues to decrease and the distance change value of the continuous decrease is greater than or equal to Y1, and less than Y2, it is judged to be leakage state 2; within the calibration period T, if the leakage positioning distance continues to decrease and the distance change value of the continuous decrease is greater than or equal to Y2, or the leakage positioning distance is less than or equal to Y3, it is judged to be leakage state 3;

[0015] Preferably, the emergency disposal measure refers to that when the control and protection module of the cooling monitoring unit detects leakage state 2 or leakage state 3, the control and protection module sends a prohibition signal for the active antenna array main power supply to be powered on, a control signal for closing the main control solenoid valves of the inlet and return pipes, and a control signal for opening the drain solenoid valve. After the BIT unit of the equipment receives the signal, the active antenna array main power supply is prohibited from being powered on if it is not powered on, and the power is cut off for protection if it is powered on, thereby preventing external coolant from entering the antenna array. The leaked coolant is collected by the liquid collecting and diversion trough, and the excess leaked coolant is discharged through the drain pipe.

[0016] Preferably, the main control solenoid valve selects normally open when power is off and closed when power is on as its basic state, the discharge solenoid valve selects normally open when power is on and closed when power is off as its basic state, and the pressure relief solenoid valve selects normally open when power is on and closed when power is off as its basic state.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The evaluation gave four leakage conditions in the antenna and implemented corresponding automatic disposal measures, reducing manual intervention and effectively improving the safety of the liquid-cooled antenna array.

[0019] 2. In the case of leakage status 2 and leakage status 3, protective measures are automatically taken to cut off the coolant supply, shut down the main power of the antenna, and open the drain valve to discharge the leaked coolant. This can effectively prevent the leaked coolant from accumulating and flooding the functional circuits in the antenna, reduce the risk of antenna damage caused by liquid cooling leakage, and improve the working reliability and safety of the liquid-cooled antenna array. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Rear view of the embodiment liquid-cooled antenna array;

[0021] Figure 2 Embodiment liquid-cooled antenna array rear view without door;

[0022] Figure 3 A side view of a liquid-cooled antenna array of an embodiment;

[0023] Figure 4 Flow chart of the implementation steps of the leakage monitoring method.

[0024] Attached Figure 1 , 2 The meanings of the characters in 3 are as follows:

[0025] A: Antenna front compartment, B: Antenna rear compartment, 1: Liquid cooling pipe, 1.1: Liquid inlet, 1.2: Liquid return port, 1.3: Liquid drain port, 2: Skeleton shell, 3: Frame plug-in box, 4: Beam synthesis and control module, 5: Transceiver module, 6: Power supply module, 7: Cooling monitoring unit, 7.1: Control and protection module, 7.2: Main control solenoid valve, 7.3: Pressure relief solenoid valve, 7.4: Liquid drain solenoid valve, 7.5: Dehumidification device, 7.6: Cable leakage sensor, 8: Antenna door, 9: Liquid collection and diversion V-shaped groove. DETAILED DESCRIPTION

[0026] Example

[0027] In this example, the liquid-cooled antenna array is composed of Figure 1 , Figure 2 , Figure 3As shown: the liquid-cooled antenna array is structurally divided into an antenna front cabin A and an antenna rear cabin B, wherein the antenna front cabin A contains an antenna unit and a radome, and the antenna rear cabin B contains a skeleton shell 2, a frame plug-in box 3, an antenna door 8, a liquid cooling pipe 1, an integrated cable, a power supply module 6, a transceiver module 5, a beamforming and control module 4, and a cooling monitoring unit 7. The front cabin is connected to the rear cabin skeleton by bolts, and the skeleton shell 2 provides structural support for the entire antenna array. The frame plug-in box 3 is a weight-reducing hollow design and is placed in the skeleton shell 2. An integrated cable is installed inside the skeleton shell 2 for transmitting light, current, radio frequency and control signals. The power supply module 6, the transceiver module 5, and the beamforming and control module 4 are designed in the form of a plug-in box structure, and all contain cooling pipes. Blind plug water connector females are installed at both ends of the back, and blind plug docking is achieved with the integrated wiring harness connector and the water connector through the guide slot on the bottom plate of the frame plug-in box 3. They are arranged from left to right in sequence, and the transceiver module 5 is connected to a row of antenna units one by one through a radio frequency blind plug connector. The power supply of the antenna is divided into two independent parts. One is the main power supply of the active antenna array, which is provided by the power supply module 6 through the three copper bars at the bottom of the antenna rear cabin B to each module except the cooling monitoring unit 7. The other is the auxiliary power supply to supply power to the cooling monitoring unit 7. The liquid cooling pipe 1 provides cooling medium for the antenna array to ensure that it is in a suitable temperature range. The liquid cooling pipe 1 is connected to the external pipe through the liquid inlet and return pipe interfaces. The structure is divided into two sections, the upper section is the return pipe and the lower section is the liquid inlet pipe. The blind plug water connector is connected to the return pipe and the liquid inlet pipe respectively through a hose. The male head of the blind plug water connector and the male head of the blind plug integrated cable connector are fixed in the frame plug box 3. The cooling monitoring unit 7 includes a control and protection module 7.1, a leakage sensor, a main control solenoid valve 7.2 (normally open when power is off, closed when power is on), a drain solenoid valve 7.4 (normally open when power is on, closed when power is off), a pressure relief solenoid valve 7.3 (normally open when power is on, closed when power is off), and a dehumidification device 7.5. The dehumidifier 7.5 of the cooling monitoring unit 7 provides dry air for the antenna array to prevent condensation inside the antenna array. Figure 1Inside the left antenna door 8. The control and protection module 7.1 of the cooling monitoring unit 7 realizes leakage status monitoring through the leakage sensor and automatically takes protective measures. A liquid collecting and guiding groove is provided at the bottom of the antenna rear cabin B. When leaking, the coolant is collected by gravity. The bottom of the guiding groove is connected to the drainage pipe, and the drainage pipe directly discharges the liquid outlet 1.3. The antenna door 8 provides a closed environment for the entire antenna array. The antenna array and the external optical, current, radio frequency and control signal interfaces, the liquid inlet and return pipe interfaces and the drainage outlet 1.3 are all located below the antenna door 8 at the bottom of the rear side of the array. The antenna array realizes the transmission and reception of the specified angle beam under the control of external timing and information; the cross-section of the liquid collecting and guiding groove in the normal direction of the antenna is V-shaped, and the vertical line of the V-shaped opening covers the frame plug-in box 3 and the liquid cooling pipe 1, and the surface is covered with a layer of liquid absorption fabric. The leakage sensor cable is placed on the V-shaped bottom fabric of the liquid collecting and guiding groove. The liquid collecting and guiding groove and the liquid absorption fabric also have the function of collecting a small amount of leakage to prevent the leakage from overflowing. The power supply module 6, transceiver module 5, and beamforming and control module 4 inside the active antenna array all use metal shells and closed designs, and the surface is coated with three-proof paint. Except for the leakage sensor line and the control cable of the drain solenoid valve 7.4, other optical, current, radio frequency and control signal cables inside the array are suspended and higher than the top of the liquid collection and diversion groove. The liquid cooling pipe 1 is connected from the side of the array surface, with the upper right end as the water outlet and the lower left end as the water inlet. The main control solenoid valve 7.2 is installed near the bulkhead, and a pressure relief solenoid valve 7.3 is installed on the water inlet pipe in the direction of the cabin. Before the liquid cooling module is repaired and replaced, the coolant pressure in the pipe is released to prevent the coolant from splashing. The drain solenoid valve 7.4 is located on the drain pipe and connected to the liquid collection and diversion groove. The drain port 1.3 at the end of the drain pipe is located at the bottom of the right side of the antenna. The cooling monitoring unit 7 is powered by an external 220V / 50Hz power supply. The control and protection module 7.1 generates 24V and provides it to the leakage sensor and the electromagnetic control valve. The dehumidification device 7.5 is provided with a 220V / 50Hz power supply by the control and protection module 7.1. The control and protection module 7.1 is connected to the leakage sensor main controller and the dehumidification device 7.5 through a communication bus to query the leakage and temperature and humidity monitoring information regularly. The control and protection module 7.1 of the cooling monitoring unit 7 communicates the fault status information with the BIT fault detection unit of the whole equipment through the Ethernet (optical) interface.

[0028] The leakage monitoring method is implemented according to the following steps: Figure 4 As shown:

[0029] 1) The power supply of the active antenna array cooling monitoring unit 7 is powered on, the dehumidification device 7.5 works, and the external environmental control equipment provides cooling liquid to the antenna array;

[0030] 2) Except for the antenna, the main parts of the equipment are powered on and work normally;

[0031] 3) The control and protection module 7.1 of the cooling monitoring unit 7 obtains the monitoring information of the leakage sensor (leakage distance) and the monitoring information of the dehumidification device 7.5 through the 485 bus at a frequency of 10 times / second;

[0032] 4) The control and protection module 7.1 of the cooling monitoring unit 7 gives four leakage states in the current array according to the leakage monitoring information obtained: no leakage, leakage state 1, leakage state 2, leakage state 3, and sends it to the BIT unit of the equipment at a regular time;

[0033] 5) In the case of no leakage, the control and protection module 7.1 of the cooling monitoring unit 7 provides the equipment with a permission to power on the main power supply of the active antenna array; in the case of leakage state 1, the control and protection module 7.1 of the cooling monitoring unit 7 also provides leakage location information, and provides the equipment with a permission to power on the main power supply of the active antenna array, and the on-site staff determines whether maintenance work needs to be carried out immediately; in the case of leakage state 2 and leakage state 3, go to step 8);

[0034] 6) Obtain the permission to power on the main power supply of the active antenna array and, if the conditions for powering on the main power supply of other active antenna arrays are met at the same time, the equipment is allowed to power on the main power supply of the active antenna array;

[0035] 7) After receiving permission from the whole device to power on the main power supply of the active antenna array, the main power supply of the active antenna array is powered on if it is not powered on, and the power supply continues if it is powered on, and the active antenna array works normally, and then go to step 3), and repeat the cycle until the power supply of the cooling monitoring unit 7 is turned off;

[0036] 8) The control and protection module 7.1 initiates emergency measures: The control and protection module 7.1 sends a signal prohibiting the power on of the main power supply of the active antenna array, a control signal closing the main control solenoid valve 7.2 of the inlet and return pipes, and a control signal opening the drain solenoid valve 7.4. After the BIT unit of the equipment receives the signal, the main power supply of the active antenna array is prohibited from being powered on if it is not powered on, and the power is cut off for protection if it is powered on, preventing external coolant from entering the antenna array. The leaked coolant is collected by the liquid collection and diversion trough, and the excess leaked coolant is discharged through the drain pipe. The on-site staff initiates the maintenance work procedure. After the maintenance is completed, the power of the cooling monitoring unit 7 is turned off, and go to step 1) as needed.

[0037] The control and protection module 7.1 of the cooling monitoring unit 7 gives four leakage states, namely leakage state 1, leakage state 2 and leakage state 3, according to the leakage sensor information: the calibration period T, leakage state 2 distance change threshold Y1, large-scale continuous leakage distance change threshold Y2, and the minimum distance of the leakage point Y3 are set in the programmable device (CPU or FPGA) program in the control and protection module 7.1, and the judgment is carried out according to the following conditions: the calibration period T refers to the timing from any leakage event to the end of time T; within the calibration period T, there is no continuous decrease in the leakage positioning distance or the distance change value of the continuous decrease in the leakage positioning distance is less than Y1, then it is judged to be leakage state 1; within the calibration period T, there is a continuous decrease in the leakage positioning distance and the distance change value of the continuous decrease is greater than or equal to Y1, and less than Y2, then it is judged to be leakage state 2; within the calibration period T, there is a continuous decrease in the leakage positioning distance and the distance change value of the continuous decrease is greater than or equal to Y2, or the leakage positioning distance is less than or equal to Y3, then it is judged to be leakage state 3.

[0038] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. An antenna leakage assessment and protection method based on a cable sensor, characterized in that: The antenna is divided into an antenna front cabin and an antenna rear cabin, which is a closed environment, wherein the antenna rear cabin includes a skeleton shell, a frame plug-in box, a liquid cooling pipe, an integrated cable, a power supply module, a transceiver module, a beam synthesis and control module, and a cooling monitoring unit. The frame plug-in box is placed in the skeleton shell, and the power supply module, the transceiver module, and the beam synthesis and control module are plug-in box structures, which are blindly plugged in with the integrated wiring harness connector and the water connector through the guide slot of the bottom plate of the frame plug-in box; the antenna power supply includes two independent parts: one is the main power supply provided by the power supply module to each module except the cooling monitoring unit, and the other is the auxiliary power supply to the cooling monitoring unit alone; the liquid cooling pipe provides cooling for the antenna array The medium is connected to the external pipeline through the liquid inlet and return pipe interfaces, and the blind plug water connector is connected to the return pipe and the liquid inlet pipe respectively through a hose; the cooling monitoring unit includes a control and protection module, a cable leakage sensor, a main control solenoid valve, a drain solenoid valve, a pressure relief solenoid valve, and a dehumidification device; the control and protection module of the cooling monitoring unit realizes leakage status monitoring through a leakage sensor and automatically takes protective disposal measures; a liquid collecting guide groove is provided at the bottom of the antenna rear cabin, and the coolant is collected by gravity when leaking, the bottom of the guide groove is connected to the drain pipe, the drain pipe is directly connected to the drain port, and a leakage sensor cable is placed at the bottom of the guide groove; the leakage monitoring and leakage protection method is implemented according to the following steps: Step 1: The antenna cooling monitoring unit is powered on, the dehumidifier is working, and the external environmental control equipment provides cooling liquid to the antenna; Step 2: Power on the main parts of the device except the antenna and make them work normally; Step 3: The control and protection module of the cooling monitoring unit periodically obtains the monitoring information of the leakage sensor and the monitoring information of the dehumidification device through the bus; Step 4: The control and protection module of the cooling monitoring unit evaluates and gives four leakage states in the antenna according to the leakage monitoring information obtained: no leakage, leakage state 1, leakage state 2, and leakage state 3, and sends them to the BIT unit of the equipment at a regular time; Step 5: In the case of no leakage, the cooling monitoring unit control and protection module provides the equipment with permission to power on the antenna main power supply; in the case of leakage state 1, the cooling monitoring unit control and protection module provides leakage location information and provides the equipment with permission to power on the antenna main power supply, and the on-site staff determines whether maintenance work needs to be carried out immediately; in the case of leakage state 2 and leakage state 3, go to step 8; Step 6: Obtain the antenna main power supply power-on permission and, if the conditions for other antenna main power supplies to be powered on are met at the same time, the device allows the antenna main power supply to be powered on; Step 7: After receiving permission from the device to power on the antenna main power supply, power on the antenna main power supply if it is not powered on, and continue to power on if it is powered on. The antenna works normally, and then go to step 3, and repeat the cycle until the cooling monitoring unit power supply is turned off; Step 8: The control and protection module initiates emergency measures and waits for the on-site staff to initiate the maintenance work procedure. After the maintenance is completed, the cooling monitoring unit power is reset or turned off, and go to step 1 as needed.

2. According to claim 1, a cable sensor-based antenna leakage assessment and protection method, characterized in that: The leakage state 1, leakage state 2, and leakage state 3 states refer to setting the calibration period T, the leakage state 2 distance change threshold Y1, the large number of continuous leakage distance change threshold Y2, and the minimum distance of the leakage point Y3 through the programmable components in the cooling monitoring unit control and protection module, and making judgments based on the following conditions: the calibration period T refers to the timing starting from any leakage event and ending at time T; within the calibration period T, if there is no continuous decrease in the leakage positioning distance or the distance change value of the continuous decrease in the leakage positioning distance is less than Y1, it is judged to be leakage state 1; within the calibration period T, if the leakage positioning distance continues to decrease and the distance change value of the continuous decrease is greater than or equal to Y1, and less than Y2, it is judged to be leakage state 2; within the calibration period T, if the leakage positioning distance continues to decrease and the distance change value of the continuous decrease is greater than or equal to Y2, or the leakage positioning distance is less than or equal to Y3, it is judged to be leakage state 3.

3. The antenna leakage assessment and protection method based on cable sensor according to claim 1 is characterized by: The emergency disposal measures in step 8 include: when the control and protection module of the cooling monitoring unit detects leakage state 2 or leakage state 3, the control and protection module sends a prohibition signal for the active antenna array main power supply to be powered on, a control signal for closing the main control solenoid valves of the inlet and return pipes, and a control signal for opening the drain solenoid valve. After the BIT unit of the equipment receives the signal, power-on is prohibited if the antenna main power supply is not powered on, and power-off protection is performed if power is already powered on, thereby preventing external coolant from entering the antenna. The leaked coolant is collected in the liquid collection and diversion trough and then discharged through the drain pipe.

4. The antenna leakage assessment and protection method based on cable sensor according to claim 1 is characterized by: The main control solenoid valve selects normally open when power is off and closed when power is on as its basic state, the discharge solenoid valve selects normally open when power is on and closed when power is off as its basic state, and the pressure relief solenoid valve selects normally open when power is on and closed when power is off as its basic state.

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