Control device for automatic water replenishing of cooling reservoir

Abstract

The invention belongs to the technical field of aircraft model test measurement and control, and particularly relates to a control device for automatic water replenishing of a cooling reservoir, which comprises a liquid level sensor used for monitoring the water level of the cooling reservoir in real time; the controller is in communication connection with the liquid level sensor and is configured to receive the water level signal and generate a control instruction; a preset lower limit water level threshold value and a preset upper limit water level threshold value are arranged in the at least two cooling reservoirs; the water source is communicated with the cooling reservoir; the at least two electromagnetic valves are mounted on a water conveying pipeline between the water source and the cooling reservoir and are controlled by the controller; when the liquid level sensor detects that the water level of the cooling reservoir is lower than a lower limit threshold value, the controller triggers the electromagnetic valve to be opened so as to supplement water to the cooling reservoir; when it is detected that the water level exceeds the upper limit threshold value, the controller triggers the electromagnetic valve to be closed so as to stop water supplementing.

Description

Technical Field

[0001] The present application belongs to the field of aircraft type test and control technology, and in particular relates to a control device for automatic water replenishment of a cooling reservoir. Background Art

[0002] The automatic water replenishment control device for the cooling water reservoir is a set of special fatigue test equipment including software and hardware developed according to the needs of laboratory test equipment upgrades and renovations. The power source cooling system has been in use for more than ten years. During this period, it has undergone several repairs and renovations, and the competent department has changed hands several times. The circuit diagram has long been lost, and intelligent upgrades are difficult. Sufficient cooling water is the fundamental condition for the normal operation of the cooling system. In the past, the water level of the cooling water reservoir was checked manually at regular intervals. The old liquid level sensor was damaged, and the manhole cover could only be removed each time to estimate the water level manually and manually open the water replenishment valve to replenish water. Replenishment generally takes several hours. Sometimes the valve is forgotten to be closed, causing water to overflow from the cooling reservoir, resulting in a waste of water resources and even danger to other equipment.

[0003] The present invention replaces the liquid level sensor of the cooling water reservoir and adds a solenoid valve to control water replenishment, ultimately realizing real-time automatic monitoring of the water level by PLC, and intelligently replenishing water according to the upper and lower limits of the cooling water reservoir water level set by the host computer main control program, so that the water level of the cooling water reservoir is always within the specified range, thereby ensuring the normal operation of the fatigue test. Summary of the invention

[0004] In order to solve the above problems, the present application provides a control device for automatic water replenishment of a cooling water reservoir, comprising:

[0005] One or more liquid level sensors for real-time monitoring of the water level in the cooling water reservoir;

[0006] A controller, in communication with the liquid level sensor, configured to receive a water level signal and generate a control instruction;

[0007] One or more cooling water reservoirs, each having a preset lower water level threshold and an upper water level threshold;

[0008] a water source, connected to the cooling water reservoir;

[0009] One or more solenoid valves, installed on the water pipeline between the water source and the cooling water reservoir, and controlled by the controller;

[0010] When the liquid level sensor detects that the water level in the cooling water reservoir is lower than the lower limit threshold, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the liquid level sensor detects that the water level exceeds the upper limit threshold, the controller triggers the solenoid valve to close to stop replenishing water.

[0011] Preferably, the cooling water reservoir comprises an air compressor cooling water reservoir and an oil pump cooling water reservoir, and the two reservoirs are connected to the water source via solenoid valves respectively.

[0012] Preferably, the controller comprises the following modules:

[0013] A signal processing unit, used for filtering and digitally converting the analog signal of the liquid level sensor;

[0014] The logic judgment unit dynamically adjusts the opening of the solenoid valve based on the preset PID algorithm;

[0015] Communication interface, supporting RS-485 bus protocol and linkage with host computer monitoring system;

[0016] The logic judgment unit has a built-in double redundancy check mechanism to prevent control failure caused by misjudgment.

[0017] Preferably, the solenoid valve is a normally closed electromagnetically driven valve with a response time of ≤50ms, a rated voltage of DC24V, a maximum diameter of DN50, and is equipped with a mechanical manual override device, which can be forcibly opened and closed by rotating the handle in a power-off state.

[0018] Preferably, the cooling water reservoir has a plurality of partition baffles to divide the cooling water reservoir into independent water storage units;

[0019] Overflow channel, connected to the secondary water reservoir, automatically diverts water when a system failure causes the water level to continue to rise;

[0020] Among them, the height difference at the top of each partition forms a stepped drop, ensuring that the water flow is evenly distributed during water replenishment.

[0021] Preferably, the controller is further configured as follows:

[0022] When the water level is in the normal range, it enters low power mode and the power consumption is reduced to 30% of the normal mode;

[0023] Automatically generate water level change curves and statistical reports every hour and upload them to the cloud management platform via the 4G / WiFi module;

[0024] Supports multi-level permission management, and different operators can log in to the system through fingerprint recognition or dynamic verification code.

[0025] Preferably, a fault diagnosis module is also included, whose functions include:

[0026] Real-time monitoring of solenoid valve coil impedance, if the deviation exceeds 15%, an alarm will be issued and the valve will be locked;

[0027] When water replenishment fails for three consecutive times, the standby water pump will be automatically started for forced water replenishment;

[0028] Record fault codes and occurrence time, with a storage period of no less than 10 years, and can export data via the USB interface.

[0029] Preferably, it also includes a human-computer interaction terminal, whose functions include:

[0030] Touch screen interface, showing real-time water level, equipment status and historical data;

[0031] A virtual joystick allows manual adjustment of the solenoid valve opening;

[0032] Voice prompt module supports bilingual alarm broadcasts in Mandarin and English.

[0033] Preferably, when the liquid level sensor detects that the water level in the cooling water reservoir is lower than the sum of the lower limit threshold and the set value, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the water level is detected to be greater than the difference between the upper limit threshold and the set value, the controller triggers the solenoid valve to close to stop replenishing water.

[0034] Preferably, when the liquid level sensor detects that the water level of the cooling water reservoir is lower than a lower threshold or higher than an upper threshold, an alarm is triggered.

[0035] The advantages of this application include: using ultrasonic sensing + temperature compensation technology to eliminate measurement errors caused by environmental interference

[0036] Dynamic adjustment based on PID algorithm combined with redundancy check ensures control reliability

[0037] Triple protection mechanism (solenoid valve self-locking, overflow channel, backup power supply) ensures system stability under extreme working conditions

[0038] Intelligent power management and hierarchical sleep strategy reduce system operating costs

[0039] Modular design supports the addition of value-added functions such as water quality treatment and remote monitoring in the future

[0040] The claims have established a complete protection system from core functions to peripheral extensions, which not only covers the essential points of the basic invention, but also forms a multi-level patent barrier through additional technical features. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural block diagram of a control device for automatic water replenishment of a cooling reservoir in a preferred embodiment of the present application.

[0042] Figure 2 This is a working flow chart of a control device for automatic water replenishment of a cooling water reservoir in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0044] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0045] The present application provides a control device for automatic water replenishment of a cooling water reservoir, comprising:

[0046] Liquid level sensor, used to monitor the water level of cooling reservoir in real time;

[0047] A controller, in communication with the liquid level sensor, configured to receive a water level signal and generate a control instruction;

[0048] A cooling water reservoir, wherein a preset lower water level threshold and an upper water level threshold are set;

[0049] a water source, connected to the cooling water reservoir;

[0050] A solenoid valve installed on the water pipeline between the water source and the cooling water reservoir and controlled by the controller;

[0051] When the liquid level sensor detects that the water level in the cooling water reservoir is lower than the lower limit threshold, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the liquid level sensor detects that the water level exceeds the upper limit threshold, the controller triggers the solenoid valve to close to stop replenishing water.

[0052] In some optional implementations, the system adopts an Internet of Things architecture design, such as Figure 1 As shown, the host computer software is written in the visual language LabView and is closely integrated with the hardware platform. It can remotely monitor the reservoir water level and water replenishment status in real time and remotely set the upper and lower limits of the water level.

[0053] The controller uses a programmable logic controller (PLC) as the control core. Through real-time monitoring of the water level of the reservoir, it automatically replenishes the cooling reservoir according to the set upper and lower limits, realizing intelligent control. The network layer uses optical fiber, network cables, and switches to form a local area network to complete data upload and download.

[0054] The controller's PLC monitors the water level in real time through the connected reservoir level sensor. The solenoid valve must be installed in a horizontal position, so the pipeline needs to be adjusted according to the position of the solenoid valve.

[0055] Since the reservoir liquid level sensor is installed outdoors, a rainproof box with an observation window is customized to increase its service life.

[0056] The host computer can remotely monitor the water level and water replenishment status of the reservoir through optical fiber and switches. The upper and lower limits of the reservoir are set through the setting box, and the current setting value of the controller can also be automatically imported. If modification is required, enter the setting value in the upper and lower limit input boxes, click the "Send" button, and the host computer will send it to the corresponding address bit of the PLC through the OPC Server. The feedback value will be updated in real time to check whether the setting operation is valid.

[0057] In remote state, the host computer can also be used to manually open the solenoid valve to replenish water. In order to stop automatic water replenishment during equipment maintenance, such as cleaning the reservoir, the software sets an automatic water replenishment switch. After it is turned off, the PLC stops automatic water replenishment, and the solenoid valve will not be started to replenish water when the value is lower than the set value.

[0058] In some optional implementations, the cooling water reservoir includes an air compressor cooling water reservoir and an oil pump cooling water reservoir, and the two reservoirs are connected to the water source via solenoid valves respectively.

[0059] In some optional embodiments, the controller includes the following modules:

[0060] A signal processing unit, used for filtering and digitally converting the analog signal of the liquid level sensor;

[0061] The logic judgment unit dynamically adjusts the opening of the solenoid valve based on the preset PID algorithm;

[0062] Communication interface, supporting RS-485 bus protocol and linkage with host computer monitoring system;

[0063] The logic judgment unit has a built-in double redundancy check mechanism to prevent control failure caused by misjudgment.

[0064] In some optional embodiments, the solenoid valve is a normally closed electromagnetically driven valve with a response time of ≤50ms, a rated voltage of DC24V, a maximum diameter of DN50, and is equipped with a mechanical manual override device, which can be forced to open and close by rotating the handle in a power-off state.

[0065] In some optional embodiments, the cooling water reservoir has a plurality of partition baffles, dividing the cooling water reservoir into independent water storage units;

[0066] Overflow channel, connected to the secondary water reservoir, automatically diverts water when a system failure causes the water level to continue to rise;

[0067] Among them, the height difference at the top of each partition forms a stepped drop, ensuring that the water flow is evenly distributed during water replenishment.

[0068] In some optional implementations, the controller is further configured to:

[0069] When the water level is in the normal range, it enters low power mode and the power consumption is reduced to 30% of the normal mode;

[0070] Automatically generate water level change curves and statistical reports every hour and upload them to the cloud management platform via the 4G / WiFi module;

[0071] Supports multi-level permission management, and different operators can log in to the system through fingerprint recognition or dynamic verification code.

[0072] In some optional implementations, a fault diagnosis module is also included, whose functions include:

[0073] Real-time monitoring of solenoid valve coil impedance, if the deviation exceeds 15%, an alarm will be issued and the valve will be locked;

[0074] When water replenishment fails for three consecutive times, the standby water pump will be automatically started for forced water replenishment;

[0075] Record fault codes and occurrence time, with a storage period of no less than 10 years, and can export data via the USB interface.

[0076] In some optional implementations, a human-computer interaction terminal is also included, and its functions include:

[0077] Touch screen interface, showing real-time water level, equipment status and historical data;

[0078] Specifically, the water replenishment status can be monitored through the touch screen installed on the control cabinet panel. The water level of the cooling water reservoir, the operating status of the water replenishment solenoid valve, the alarm status and other information can be clearly observed through the touch screen.

[0079] A virtual joystick allows manual adjustment of the solenoid valve opening;

[0080] Voice prompt module supports bilingual alarm broadcasts in Mandarin and English.

[0081] In some optional embodiments, when the liquid level sensor detects that the water level in the cooling water reservoir is lower than the sum of a lower limit threshold and a set value, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the water level is detected to be greater than the difference between an upper limit threshold and a set value, the controller triggers the solenoid valve to close to stop replenishing water.

[0082] In some optional implementations, when the liquid level sensor detects that the water level in the cooling water reservoir is lower than a lower threshold or higher than an upper threshold, an alarm is triggered.

[0083] The advantages of this application include: using ultrasonic sensing + temperature compensation technology to eliminate measurement errors caused by environmental interference

[0084] Dynamic adjustment based on PID algorithm combined with redundancy check ensures control reliability

[0085] Triple protection mechanism (solenoid valve self-locking, overflow channel, backup power supply) ensures system stability under extreme working conditions

[0086] Intelligent power management and hierarchical sleep strategy reduce system operating costs

[0087] Modular design supports the addition of value-added functions such as water quality treatment and remote monitoring in the future

[0088] The claims have established a complete protection system from core functions to peripheral extensions, which not only covers the essential points of the basic invention, but also forms a multi-level patent barrier through additional technical features.

[0089] Working principle Figure 2 As shown, the upper computer performs remote status monitoring and parameter setting, and is connected to the lower computer PLC through optical fiber and switches. The PLC monitors the water level of the reservoir in real time, and automatically determines whether water replenishment is needed based on the set value. When it is monitored that the water level is lower than the lower limit plus 0.1 meter, water is replenished immediately and no alarm is triggered. When it is monitored that the water level is lower than the lower limit, the system will consider that there is a fault in the water replenishment system and automatic water replenishment cannot be achieved, triggering an alarm and requiring technical personnel to investigate.

[0090] When the water level is greater than the upper limit minus 0.1 meters, the system intelligently determines that the water level of the reservoir has reached the highest level and immediately stops the automatic water replenishment. If it is detected to be higher than the upper limit, the system believes that the water replenishment solenoid valve has not closed automatically and there is a fault, and an alarm is immediately issued.

[0091] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A control device for automatic water replenishment of a cooling reservoir, characterized in that: include: One or more liquid level sensors for real-time monitoring of the water level in the cooling water reservoir; A controller, in communication with the liquid level sensor, configured to receive a water level signal and generate a control instruction; One or more cooling water reservoirs, each having a preset lower water level threshold and an upper water level threshold; a water source, connected to the cooling water reservoir; One or more solenoid valves, installed on the water pipeline between the water source and the cooling water reservoir, and controlled by the controller; When the liquid level sensor detects that the water level in the cooling water reservoir is lower than the lower limit threshold, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the liquid level sensor detects that the water level exceeds the upper limit threshold, the controller triggers the solenoid valve to close to stop replenishing water.

2. The control device for automatic water replenishment of cooling water reservoir according to claim 1, characterized in that: The cooling water reservoir comprises an air compressor cooling water reservoir and an oil pump cooling water reservoir, and the two reservoirs are connected to the water source through electromagnetic valves respectively.

3. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: The controller includes the following modules: A signal processing unit, used for filtering and digitally converting the analog signal of the liquid level sensor; The logic judgment unit dynamically adjusts the opening of the solenoid valve based on the preset PID algorithm; Communication interface, linked with the host computer monitoring system through the switch; The logic judgment unit has a built-in double redundancy check mechanism to prevent control failure caused by misjudgment.

4. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: The solenoid valve is a normally closed electromagnetically driven valve with a response time of ≤50ms, a rated voltage of DC24V, a maximum diameter of DN50, and is equipped with a mechanical manual override device, which can be forcibly opened and closed by rotating the handle in the power-off state.

5. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: The cooling water reservoir has a plurality of partition baffles, which divide the cooling water reservoir into independent water storage units; Overflow channel, connected to the secondary water reservoir, automatically diverts water when a system failure causes the water level to continue to rise; Among them, the height difference at the top of each partition forms a stepped drop, ensuring that the water flow is evenly distributed during water replenishment.

6. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: The controller is further configured to: When the water level is in the normal range, it enters low power mode and the power consumption is reduced to 30% of the normal mode; Automatically generate water level change curves and statistical reports every hour and upload them to the cloud management platform via the 4G / WiFi module; Supports multi-level permission management, and different operators can log in to the system through fingerprint recognition or dynamic verification code.

7. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: It also includes a fault diagnosis module, whose functions include: Real-time monitoring of solenoid valve coil impedance, if the deviation exceeds 15%, an alarm will be issued and the valve will be locked; When water replenishment fails for three consecutive times, the standby water pump will be automatically started for forced water replenishment; Record fault codes and occurrence time, and export data via USB interface.

8. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: It also includes a human-computer interaction terminal, whose functions include: Touch screen interface, showing real-time water level, equipment status and historical data; A virtual joystick allows manual adjustment of the solenoid valve opening; Voice prompt module supports bilingual alarm broadcasts in Mandarin and English.

9. The control device for automatic water replenishment of cooling reservoir according to claim 1, characterized in that: When the liquid level sensor detects that the water level in the cooling water reservoir is lower than the sum of the lower limit threshold and the set value, the controller triggers the solenoid valve to open to replenish water to the cooling water reservoir; when the liquid level is detected to be greater than the difference between the upper limit threshold and the set value, the controller triggers the solenoid valve to close to stop replenishing water.

10. The control device for automatic water replenishment of cooling water reservoir according to claim 1, characterized in that: When the liquid level sensor detects that the water level of the cooling water reservoir is lower than the lower threshold or higher than the upper threshold, an alarm is triggered.

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