Pneumatic system, detection method, device and storage medium for a pneumatic system

Abstract

The application discloses a kind of pneumatic system, detection method, device and storage medium for pneumatic system, detection method includes: in the case where the pressure difference switch detects the pressure of gas storage device is greater than or equal to first pressure, pressure difference switch is disconnected, control gas compression device pause work;Detect whether work mechanism is working;In the case where it is determined that work mechanism is in working state and the pressure difference switch detects the pressure of gas storage device is less than second pressure, pressure difference switch is closed again, to control gas compression device starts work, wherein, first pressure is greater than second pressure;In the case where the pressure difference switch detects again that the pressure of gas storage device is greater than or equal to first pressure, pressure difference switch is disconnected again, and the first duration consumed when pressure difference switch is closed again to disconnected again is acquired;In the case where first duration is greater than first preset duration, it is determined that there is abnormality in pneumatic system.The above scheme can protect gas compression device, avoid its long time work and burn out.

Description

Technical Field

[0001] This application relates to the field of engineering vehicle technology, and more specifically to a pneumatic system, a detection method for the pneumatic system, an apparatus, and a storage medium. Background Technology

[0002] Currently, most sanitation vehicles rely on electromagnetic valves to control cylinders to perform critical actions, such as lifting and self-adapting the sweeping discs, lifting and self-adapting the roller sweeper or suction nozzle, and controlling the on / off state of the high-pressure water circuit. Typically, the pneumatic system of some small-tonnage vehicle chassis consists of a miniature air compressor and an air tank. The air compressor starts working after being powered on, generating high-pressure gas, which is then stored in the air tank. However, because the air compressor needs to move at high speed to generate high-pressure gas, it produces a large amount of heat, so it cannot operate for extended periods. If the air compressor's single-operation time exceeds its maximum capacity, it risks burning out. Summary of the Invention

[0003] The purpose of this application is to provide a pneumatic system, a detection method, a device, and a storage medium for the pneumatic system, in order to solve the technical problem that air compressors in the prior art are at risk of burning out during long-term operation.

[0004] To achieve the above objectives, the first aspect of this application provides a detection method for a pneumatic system. The pneumatic system includes a gas storage device, a working mechanism, a gas compression device, and a differential pressure switch. The gas storage device is connected to both the working mechanism and the gas compression device. The gas compression device supplies compressed gas to the gas storage device, and the gas storage device stores the compressed gas. The differential pressure switch controls the start and stop of the gas compression device. The detection method includes:

[0005] The differential pressure switch is closed to control the gas compression device to start working;

[0006] When the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens to control the gas compression device to stop working.

[0007] Check whether the inspection equipment is in operation;

[0008] When it is determined that the working mechanism is in operation and the differential pressure switch detects that the pressure of the gas storage device is less than the second pressure, the differential pressure switch closes again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure;

[0009] If the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure again, the differential pressure switch will open again, and the first time taken from when the differential pressure switch closes again to when it opens again will be recorded.

[0010] If the first duration exceeds the first preset duration, an anomaly is determined to exist in the pneumatic system.

[0011] In embodiments of this application, the detection method further includes: determining that the pneumatic system is normal when the first duration is less than or equal to the first preset duration.

[0012] In the embodiments of this application, the first preset duration is the first standard duration, which refers to the duration between the start time point when the differential pressure switch closes when it detects that the pressure of the gas storage device is less than the second pressure, and the end time point when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions; or the first preset duration is the sum of the first standard duration and the first preset redundancy duration.

[0013] In embodiments of this application, the detection method further includes: when the differential pressure switch is closed again to control the gas compression device to start working, acquiring in real time the first working time of the gas compression device in this operation; when the first working time is greater than the first preset time and the differential pressure switch is not opened again, determining that there is an abnormality in the pneumatic system; when the first working time is less than or equal to the first preset time and the differential pressure switch is opened again, determining that the pneumatic system is normal.

[0014] In embodiments of this application, the detection method further includes: determining that there is an abnormality in the pneumatic system when it is determined that the working mechanism is not in operation and the differential pressure switch is closed again.

[0015] In an embodiment of this application, when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch is opened to control the gas compression device to suspend operation. This includes: when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the differential pressure switch is opened, obtaining a second time taken for the differential pressure switch to open from closing; if the second time is greater than a second preset time, determining that there is an abnormality in the pneumatic system; if the second time is less than or equal to the second preset time, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation.

[0016] In the embodiments of this application, when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens to control the gas compression device to suspend operation. This further includes: when the differential pressure switch is closed to control the gas compression device to start operation, acquiring the second operating duration of the gas compression device in real time; when the second operating duration is less than or equal to the second preset duration, and the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the differential pressure switch opens, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation; when the second operating duration is greater than the second preset duration, and the differential pressure switch does not open, determining that there is an abnormality in the pneumatic system.

[0017] In the embodiments of this application, the second preset duration is the second standard duration, which refers to the standard duration between the start time point when the differential pressure switch closes when it detects that the pressure of the gas storage device is zero, and the end time point when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions; or the second preset duration is the sum of the second standard duration and the second preset redundancy duration.

[0018] A second aspect of this application provides a pneumatic system, comprising:

[0019] Gas storage device, used to store compressed gas;

[0020] A gas compression device, connected to a gas storage device, is used to provide compressed gas to the gas storage device;

[0021] Differential pressure switch, connected to the gas storage device, is used to control the start and stop of the gas compression device;

[0022] The working mechanism is connected to the gas storage device and is used to perform operations using compressed gas from the gas storage device.

[0023] The detection device includes a memory and a processor, the memory being configured to store instructions, the processor being configured to retrieve instructions from the memory, and, when executing the instructions, to implement the detection method for a pneumatic system as described above.

[0024] A third aspect of this application provides an engineering vehicle including the aforementioned pneumatic system.

[0025] The above scheme controls the gas compression device to start working by closing the differential pressure switch; when the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to a first pressure, the differential pressure switch opens to stop the gas compression device from working; it also detects whether the operating mechanism is in operation; if the operating mechanism is confirmed to be in operation and the differential pressure switch detects that the pressure in the gas storage device is less than a second pressure, the differential pressure switch closes again to start the gas compression device, where the first pressure is greater than the second pressure; if the differential pressure switch again detects that the pressure in the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens again, and the first time taken from closing to opening the differential pressure switch again is recorded; if the first time is longer than a first preset time, an abnormality in the pneumatic system is determined. This scheme detects the pressure in the gas storage device and controls the start and stop of the gas compression device by closing and opening the differential pressure switch. Furthermore, based on the operating status of the operating mechanism and a comparison between the required working time of the gas compression device and the actual working time of the gas compression device, when an abnormal operation of the gas compression device is detected, power-off protection is applied to stop the gas compression device from working. Without adding additional sensors, time-based logic protects the gas compressor, preventing it from burning out during prolonged operation.

[0026] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0028] Figure 1 The schematic diagram illustrates a flow chart of a detection method for a pneumatic system according to an embodiment of this application;

[0029] Figure 2 The illustration shows a schematic flowchart of a detection method for a pneumatic system according to a specific embodiment of this application;

[0030] Figure 3 This schematic diagram illustrates a structural block diagram of a detection device for a pneumatic system according to an embodiment of this application;

[0031] Figure 4 This schematic diagram illustrates a structural block diagram of a pneumatic system according to an embodiment of the present application;

[0032] Figure 5 The illustration shows a schematic diagram of the structure of a computer device according to an embodiment of the present application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] Figure 1 The illustration schematically shows a flow chart of a detection method for a pneumatic system according to an embodiment of this application. Figure 1 As shown in the figure, this application provides a detection method for a pneumatic system. The pneumatic system includes a gas storage device, a working mechanism, a gas compression device, and a differential pressure switch. The gas storage device is connected to both the working mechanism and the gas compression device. The gas compression device provides compressed gas to the gas storage device, and the gas storage device stores the compressed gas. The differential pressure switch controls the start and stop of the gas compression device. The detection method may include the following steps:

[0037] Pneumatic systems, as the name suggests, utilize air compressors to convert the mechanical energy output from electric motors or other prime movers into the pressure energy of air. This pressure energy is then converted into linear or rotary motion through actuators, enabling various actions and external work. Pneumatic systems are typically installed on engineering equipment, such as small sanitation vehicles. Their chassis usually lacks an air source; therefore, when pneumatic control is required, electrically driven miniature gas compressors, air storage devices, and differential pressure switches are used to provide high-pressure gas for controlling the swing of the spray boom, the on / off state of the high-pressure water circuit, etc. Once the gas compressor is activated, it continuously outputs compressed high-pressure gas to the air storage device and the subsequent pneumatic system's operating mechanisms. The gas compressor can be an air compressor, and the air storage device can be an air tank. The operating mechanisms can be sweeping discs, high-pressure water circuits, etc. The high-pressure gas from the air tank drives the cylinders and water valves. However, due to the high integration of the electrically driven miniature air compressor and the high-speed motion required to generate high-pressure gas, a large amount of heat is produced, limiting its operation to extended periods. If the air compressor operates for longer than its maximum capacity in a single cycle, it risks burning out. A differential pressure switch can control the temporary start and stop of the gas compression unit, limiting its continuous operation. When the pressure in the entire gas storage device reaches the upper limit of the preset differential pressure switch, the switch opens, de-energizing the gas compression unit and stopping operation. After the operating mechanism has worked for a period of time, if the pressure in the gas storage device falls below the lower limit of the differential pressure switch, the switch opens again, energizing the air compressor, which then begins operation until the upper limit of the differential pressure switch is reached.

[0038] S102 controls the differential pressure switch to close, thereby controlling the gas compression device to start working.

[0039] It is understandable that the differential pressure switch is normally closed, and the pressure inside the gas storage device can be considered zero before the pneumatic system is started. The controller needs to first close the differential pressure switch to energize the gas compression device and start working. A differential pressure switch is a device used to monitor the pressure difference between two different locations in a gas or liquid flow. It uses an internal sensing element to detect pressure difference changes in the pipeline, thereby realizing control and alarm functions. A differential pressure switch typically consists of an elastic diaphragm and a microswitch. When the monitored medium is applied to the elastic diaphragm, it deforms, which triggers the microswitch to switch signals, causing the circuit to perform different control operations such as opening, closing, or switching.

[0040] S104, when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch is disconnected to control the gas compression device to stop working.

[0041] It can be understood that the first pressure refers to the upper limit of the pressure that triggers the differential pressure switch to open. Differential pressure switches include mechanical differential pressure switches and electronic differential pressure switches. The working principle of a mechanical differential pressure switch is that when the pressure reaches the set pressure value, the switch is triggered to open or close. The working principle of an electronic differential pressure switch is that an electronic pressure sensor detects the set pressure value and controls the opening or closing of the differential pressure switch. Mechanical differential pressure switches can operate without any auxiliary power supply, while electronic differential pressure switches can have their delay time, output signal, deadband adjustability, and control ratio adjusted.

[0042] In an embodiment of this application, when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch is opened to control the gas compression device to suspend operation. This includes: when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the differential pressure switch is opened, obtaining a second time taken for the differential pressure switch to open from closing; if the second time is greater than a second preset time, determining that there is an abnormality in the pneumatic system; if the second time is less than or equal to the second preset time, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation.

[0043] It is understandable that after the differential pressure switch closes, the gas compression device starts working to provide compressed gas to the gas storage device, causing the pressure in the storage device to gradually increase. When the pressure in the storage device is greater than or equal to the first pressure, the differential pressure switch is triggered to open, and the gas compression device loses power. The controller can obtain the second time taken for the differential pressure switch to open from closing. That is, the second time refers to the actual time taken for the gas compression device to raise the pressure in the storage device from zero to the first pressure. The second preset time is a time threshold set by technicians based on the normal operation of the pneumatic system for the pressure in the storage device to rise from zero to the first pressure. If the second time is less than or equal to the second preset time, and the pressure in the storage device has already reached the first pressure, then it can be determined that the pneumatic system is normal, and the differential pressure switch is triggered to open, controlling the gas compression device to stop working. If the second time is greater than the second preset time, it is determined that there is an abnormality in the pneumatic system. In daily vehicle design and selection, in order for the system to work normally, the single working time of the air compressor will be much lower than its maximum capacity. However, due to air leakage caused by wear and tear in the pneumatic system pipelines or damage to components, the high-pressure gas generated by the air compressor will continuously leak out. Therefore, the pressure in the air tank may not reach the upper limit of the differential pressure switch (first pressure) within the second preset time period, causing the air compressor to continue operating and posing a risk of burnout. Therefore, if the second time period exceeds the second preset time period, it is necessary not only to stop the pneumatic system and disconnect the power to the gas compression device, but also to issue a warning to prompt technicians to inspect the pneumatic system. Abnormal conditions of the pneumatic system include, but are not limited to: air leakage due to wear and tear in the pneumatic system pipelines, damage to components, and blockage of the air inlet.

[0044] In the embodiments of this application, when the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens to control the gas compression device to suspend operation. This further includes: when the differential pressure switch is closed to control the gas compression device to start operation, acquiring the second operating duration of the gas compression device in real time; when the second operating duration is less than or equal to the second preset duration, and the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the differential pressure switch opens, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation; when the second operating duration is greater than the second preset duration, and the differential pressure switch does not open, determining that there is an abnormality in the pneumatic system.

[0045] The second operating time refers to the duration of continuous operation of the gas compressor after starting from a point where the pressure in the gas storage device is zero. If the second operating time is less than or equal to the second preset time, and the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to the first pressure, and the differential pressure switch opens, the pneumatic system is considered normal, and the gas compressor is stopped. However, if there is an abnormality in the pneumatic system, the high-pressure gas generated by the compressor will continuously leak, so the pressure in the gas storage tank will never reach the upper limit of the differential pressure switch (the first pressure), causing the air compressor to continue operating and posing a risk of burnout. Therefore, if the second operating time is longer than the second preset time, and the differential pressure switch does not detect that the pressure in the gas storage device is greater than or equal to the first pressure, resulting in the differential pressure switch not being triggered to open, then it can be directly determined that there is an abnormality in the pneumatic system. Therefore, if the second operating time is longer than the second preset time, not only should the pneumatic system be stopped and the gas compressor disconnected from power, but a warning should also be issued to prompt technicians to inspect the pneumatic system.

[0046] In the embodiments of this application, the second preset duration is the second standard duration. The second standard duration refers to the standard duration between the start time point when the differential pressure switch closes when it detects that the pressure of the gas storage device is zero, and the end time point when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions.

[0047] In the embodiments of this application, the second preset duration is the sum of the second standard duration and the second preset redundancy duration.

[0048] It is understandable that the air pump efficiency of the gas compression equipment will decrease as the air pump is used. Therefore, a second preset redundancy time is set for the air pumping time, which is the time redundancy value required for the pressure of the gas storage device to rise from 0 bar to the first pressure.

[0049] S106, Check whether the operating mechanism is in operation.

[0050] It is understandable that after the gas compression device stops working due to the differential pressure switch being disconnected, it is possible to further check whether the operating mechanism is in operation. If the operating mechanism is using compressed gas from the gas storage device, the pressure in the storage device will gradually decrease. If the operating mechanism is not in operation, the pressure in the gas storage device will remain constant.

[0051] S108, when it is determined that the working mechanism is in operation and the differential pressure switch detects that the pressure of the gas storage device is less than the second pressure, the differential pressure switch closes again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure.

[0052] It is understood that the second pressure refers to the lower limit of the pressure that triggers the differential pressure switch to close. The operating mechanism in operation will gradually reduce the pressure in the gas storage device. When the pressure in the gas storage device drops to the second pressure, it triggers the differential pressure switch to close again, causing the gas compression device to start working again. It is understood that 0 ≤ second pressure < first pressure.

[0053] In embodiments of this application, the detection method further includes: determining that there is an abnormality in the pneumatic system when it is determined that the working mechanism is not in operation and the differential pressure switch is closed again.

[0054] It's understandable that if the working mechanism isn't operating, the pressure in the gas storage device will remain constant. Therefore, if the pneumatic system is functioning normally, the differential pressure switch won't close. Once the differential pressure switch closes again, it indicates that the pressure inside the gas storage device is now less than or equal to the second pressure, suggesting a possible malfunction in the pneumatic system, such as a leak. Therefore, if the working mechanism is not operating and the differential pressure switch closes again, not only should the pneumatic system be stopped, but a warning signal should also be issued to alert technicians to inspect and repair the pneumatic system.

[0055] S110, if the differential pressure switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens again, and the first time taken from when the differential pressure switch closes again to when it opens again is obtained.

[0056] It is understandable that after the pressure in the gas storage device drops to the second pressure due to the operation of the working mechanism, the differential pressure switch is triggered to close again, causing the gas compression device to work again to supply compressed gas to the gas storage device, and the pressure in the gas storage device rises again. Then, if the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to the first pressure again, it is triggered to open again. Therefore, the first time taken from when the differential pressure switch closes again to when it opens again can be obtained. This first time can be understood as the actual time taken for the gas compression device to raise the pressure in the gas storage device from the second pressure to the first pressure.

[0057] S112, if the first duration is longer than the first preset duration, it is determined that there is an abnormality in the pneumatic system.

[0058] It is understood that the first preset time is a threshold time set by technicians based on the normal operation of the pneumatic system, for the pressure in the gas storage device to rise from the second pressure to the first pressure. If the first time exceeds the first preset time, an abnormality in the pneumatic system is determined. This is because the pressure in the gas storage tank cannot reach the upper limit of the differential pressure switch (first pressure) from the second pressure within the first preset time, causing the air compressor to continue operating and posing a risk of burnout. Therefore, if the first time exceeds the first preset time, it is necessary not only to stop the pneumatic system from operating and disconnect the power to the gas compression device, but also to issue a warning to prompt technicians to inspect and repair the pneumatic system.

[0059] The above scheme controls the gas compression device to start operating by closing a differential pressure switch; when the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to a first pressure, the differential pressure switch opens to stop the gas compression device from operating; it also detects whether the operating mechanism is in operation; if the operating mechanism is confirmed to be in operation and the differential pressure switch detects that the pressure in the gas storage device is less than a second pressure, the differential pressure switch closes again to start the gas compression device, where the first pressure is greater than the second pressure; if the differential pressure switch again detects that the pressure in the gas storage device is greater than or equal to the first pressure, the differential pressure switch opens again, and the first time taken from closing to opening the differential pressure switch is recorded; if the first time is longer than a first preset time, an abnormality in the pneumatic system is determined. This scheme detects the pressure in the gas storage device and controls the start and stop of the gas compression device by closing and opening the differential pressure switch. Furthermore, based on the operating status of the operating mechanism and a comparison between the required operating time of the gas compression device and the actual operating time of the gas compression device, when abnormal operation of the gas compression device is detected, power-off protection is applied to stop the gas compression device from operating. Without adding additional sensors, time-based logic protects the gas compressor, preventing it from burning out during prolonged operation.

[0060] In embodiments of this application, the detection method further includes: determining that the pneumatic system is normal when the first duration is less than or equal to the first preset duration.

[0061] If the pressure of the gas storage device has reached the first pressure when the first duration is less than or equal to the first preset duration, then it can be determined that the pneumatic system is normal, and the differential pressure switch is triggered to disconnect, controlling the gas compression device to stop working.

[0062] In the embodiments of this application, the first preset duration is the first standard duration, which refers to the duration between the start time point when the differential pressure switch closes when it detects that the pressure of the gas storage device is less than the second pressure, and the end time point when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions.

[0063] In the embodiments of this application, the first preset duration is the sum of the first standard duration and the first preset redundant duration.

[0064] It is understandable that the air pump efficiency of the gas compression equipment will decrease as the air pump is used. Therefore, a first preset redundancy time is set for the air pumping time, which is the time redundancy value required for the pressure of the gas storage device to rise from the second pressure to the first pressure.

[0065] In embodiments of this application, the detection method further includes: when the differential pressure switch is closed again to control the gas compression device to start working, acquiring in real time the first working time of the gas compression device in this operation; when the first working time is greater than the first preset time and the differential pressure switch is not opened again, determining that there is an abnormality in the pneumatic system; when the first working time is less than or equal to the first preset time and the differential pressure switch is opened again, determining that the pneumatic system is normal.

[0066] It can be understood that the first working time refers to the duration of continuous operation of the gas compressor after it starts working, starting when the pressure in the gas storage device is at the second pressure. When the differential pressure switch closes again to control the gas compressor to start working, the pressure in the gas storage device gradually rises from the second pressure, allowing the first working time of the gas compressor to be obtained in real time. If the first working time is less than the first preset time, and the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to the first pressure, causing the differential pressure switch to open again, the pneumatic system is determined to be normal, and the gas compressor is controlled to stop working. However, if there is an abnormality in the pneumatic system, the high-pressure gas generated by the compressor will continuously leak, so the pressure in the gas storage tank will never reach the upper limit of the differential pressure switch (the first pressure), causing the air compressor to continue working and posing a risk of burnout. Therefore, if the first working time is greater than the first preset time, and the differential pressure switch does not detect that the pressure in the gas storage device is greater than or equal to the first pressure, causing the differential pressure switch not to be triggered to open again, it can be directly determined that there is an abnormality in the pneumatic system. Therefore, if the first working time exceeds the first preset time, not only should the pneumatic system stop working and the gas compression device be powered off, but a warning should also be issued to prompt technicians to inspect the pneumatic system to check for leaks, damage to the air compressor, and blockages at the air inlet.

[0067] In embodiments of this application, the detection method further includes: if an abnormality is determined in the pneumatic system, controlling the gas compression device to stop working and issuing a warning message.

[0068] Figure 2 The illustration schematically shows a flow chart of a detection method for a pneumatic system according to an embodiment of this application. Figure 2As shown in this embodiment, the pneumatic system includes a gas storage device, a working mechanism, a gas compression device, and a differential pressure switch. The gas storage device is connected to both the working mechanism and the gas compression device. The gas compression device provides compressed gas to the gas storage device, which stores the compressed gas. The differential pressure switch controls the start and stop of the gas compression device. The pneumatic system can be installed on engineering vehicles, such as sanitation vehicles, to control the extension of the spray boom and the on / off state of the high-pressure water circuit. Before the vehicle begins actual operation, after the gas compression device, gas storage device, differential pressure switch, and pipelines of the pneumatic system are connected, the differential pressure switch is closed, and the gas compression device is started to begin operation. Previously, the pressure inside the entire gas storage device is 0 bar. The second standard time T1 required for the gas compression device to raise the pressure inside the gas storage device from 0 bar to a first pressure, triggering the differential pressure switch to open, is recorded. At this time, the differential pressure switch opens, the gas compression device loses power, and stops working. Furthermore, the pressure in the gas storage device is partially released until it drops to a second pressure, triggering the differential pressure switch to close. The gas compressor is then energized and begins operation until the pressure rises back to the first pressure, triggering the differential pressure switch to open and the gas compressor stops operating. The first standard time T2 required for the gas compressor to raise the pressure in the gas storage device from the second pressure to the first pressure, triggering the differential pressure switch to open, is recorded. Additionally, the maximum single-run duration of operation for the gas compressor can be obtained, denoted as T3. It can be understood that the maximum single-run duration T3 can refer to the time from when the gas compressor starts operating until it burns out.

[0069] As the air pump is used, the pumping efficiency will decrease. Therefore, a redundancy value is set for the pumping time of the gas compression device. The first preset redundancy time required for the pressure in the gas storage device to rise from 0 bar to the upper limit of the differential pressure switch (first pressure) is t1. The second preset redundancy time required for the pressure in the entire pneumatic system to rise from the lower limit of the differential pressure switch (second pressure) to the upper limit of the differential pressure switch (first pressure) is t2. The condition that the above multiple time values ​​must satisfy is: T2 + t1. <T3、T1+t2<T3。

[0070] The first standard duration T2, the second standard duration T1, the first preset redundancy duration t1, the second preset redundancy duration t2, the maximum value of a single long-duration operation T3, and the relationships between them are all recorded in the memory. When the vehicle starts operating, the differential pressure switch of the gas system closes, and the gas compression device starts working. The controller records the second duration from the closing to the opening of the differential pressure switch, which is recorded as CT1. When CT1 > T2 + t1, the controller can determine that the vehicle's pneumatic system is leaking. Before the gas compression device reaches its maximum continuous working time T3, the power supply to the gas compression device is actively disconnected, stopping its operation, and the vehicle operator is reminded to check the pneumatic system for leaks, damage to the gas compression device, and blockages in the air inlet. If CT1 < T2 + t1, the gas storage device reaches the first pressure, triggering the differential pressure switch to open, causing the gas compression device to lose power. At this time, it can be determined whether the working mechanism is operating. If the working mechanism is inactive—that is, the vehicle is not using high-pressure gas to drive the cylinders or water valves during operation—but the air pressure in the air storage device drops to the lower limit (second pressure), triggering the differential pressure switch to close again, and the gas compressor starts working, it can be determined that the pneumatic system is malfunctioning and requires a power-off inspection. If the working mechanism is active—that is, the vehicle is using high-pressure gas to drive the cylinders or water valves during operation—then when the air pressure in the air storage device drops to the lower limit (second pressure), it triggers the differential pressure switch to close again, energizing the gas compressor to start working again. In this case, the time from when the differential pressure switch opens to when it closes again can be recorded as CT2. When CT2 > T1 + t2, the controller can determine that the vehicle's pneumatic system is continuously leaking. Before the air compressor's continuous operating time reaches its maximum value T3, the controller will actively disconnect the power supply to the gas compressor, stopping its operation. Furthermore, the vehicle operator will be reminded to check the pneumatic system for leaks, damage to the air compressor, and blockages at the air inlet.

[0071] The above solution compares the required operating time of the air compressor under different working conditions with the actual operating time of the air compressor. When abnormal operation of the air compressor is detected, it cuts off the power to stop the air compressor from working and alerts the operator through the controller, actively troubleshooting the pneumatic system. Without adding additional sensors, the system uses time logic control to achieve a pneumatic pipeline leakage warning function, thereby protecting the air compressor and preventing it from burning out due to prolonged operation.

[0072] Figure 1 This is a flowchart illustrating a detection method for a pneumatic system in one embodiment. It should be understood that, although... Figure 1The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0073] Figure 3 A schematic block diagram of a detection device for a pneumatic system according to an embodiment of this application is shown. Figure 3 As shown, this application embodiment provides a detection device 300 for a pneumatic system, which may include:

[0074] Memory 310 is configured to store instructions;

[0075] The processor 320 is configured to retrieve instructions from the memory 310 and, when executing the instructions, to implement the aforementioned detection method for a pneumatic system.

[0076] Specifically, in this embodiment of the application, the processor 320 can be configured to:

[0077] The differential pressure switch is closed to start the gas compression device; when the differential pressure switch detects that the pressure in the gas storage device is greater than or equal to a first pressure, the differential pressure switch is opened to stop the gas compression device from operating; the operating mechanism is checked for operation; when the operating mechanism is confirmed to be operating and the differential pressure switch detects that the pressure in the gas storage device is less than a second pressure, the differential pressure switch is closed again to start the gas compression device, wherein the first pressure is greater than the second pressure; when the differential pressure switch detects again that the pressure in the gas storage device is greater than or equal to the first pressure, the differential pressure switch is opened again, and the first time taken from the time the differential pressure switch is closed again to the time it is opened again is obtained; if the first time is longer than a first preset time, an abnormality is determined to exist in the pneumatic system.

[0078] In this embodiment of the application, the processor 320 can also be configured to:

[0079] If the first duration is less than or equal to the first preset duration, the pneumatic system is determined to be normal.

[0080] In this embodiment of the application, the processor 320 can also be configured to:

[0081] The first preset duration is the first standard duration, which refers to the duration between the start time when the differential pressure switch closes when it detects that the pressure of the gas storage device is less than the second pressure, and the end time when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions.

[0082] In this embodiment of the application, the processor 320 can also be configured to:

[0083] The first preset duration is the sum of the first standard duration and the first preset redundancy duration.

[0084] In this embodiment of the application, the processor 320 can also be configured to:

[0085] If the differential pressure switch closes again to control the gas compression device to start working, the first working time of the gas compression device in this operation is acquired in real time; if the first working time is greater than the first preset time and the differential pressure switch does not open again, it is determined that there is an abnormality in the pneumatic system; if the first working time is less than or equal to the first preset time and the differential pressure switch opens again, it is determined that the pneumatic system is normal.

[0086] In this embodiment of the application, the processor 320 can also be configured to:

[0087] If the operating mechanism is determined to be not in operation and the differential pressure switch is closed again, it is determined that there is an abnormality in the pneumatic system.

[0088] In this embodiment of the application, the processor 320 can also be configured to:

[0089] When the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the differential pressure switch is opened, the second time taken for the differential pressure switch to open from closing is obtained; if the second time is greater than the second preset time, it is determined that there is an abnormality in the pneumatic system; if the second time is less than or equal to the second preset time, it is determined that the pneumatic system is normal and the gas compression device is controlled to stop working.

[0090] In this embodiment of the application, the processor 320 can also be configured to:

[0091] When the differential pressure switch is closed to control the gas compression device to start working, the second working time of the gas compression device is acquired in real time; when the second working time is less than or equal to the second preset time, and the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the differential pressure switch is opened, the pneumatic system is determined to be normal, and the gas compression device is controlled to stop working; when the second working time is greater than the second preset time, and the differential pressure switch is not opened, the pneumatic system is determined to be abnormal.

[0092] In this embodiment of the application, the processor 320 can also be configured to:

[0093] The second preset duration is the second standard duration. The second standard duration refers to the standard duration between the start time when the differential pressure switch closes when it detects that the pressure of the gas storage device is zero, and the end time when the differential pressure switch opens when it detects that the pressure of the gas storage device is greater than the first pressure, under normal pneumatic system conditions.

[0094] In this embodiment of the application, the processor 320 can also be configured to:

[0095] The second preset duration is the sum of the second standard duration and the second preset redundancy duration.

[0096] In this embodiment of the application, the processor 320 can also be configured to:

[0097] If an abnormality is detected in the pneumatic system, the gas compression device will be stopped and a warning message will be issued.

[0098] Figure 4 A schematic block diagram of a pneumatic system according to an embodiment of this application is shown. Figure 4 As shown, this application embodiment provides a pneumatic system 400, which may include:

[0099] Gas storage device 410 is used to store compressed gas;

[0100] Gas compression device 420 is connected to gas storage device 410 to provide compressed gas to gas storage device 410;

[0101] Differential pressure switch 430 is connected to gas storage device 410 and is used to control the start and stop of gas compression device 420;

[0102] The working mechanism 440 is connected to the gas storage device 410 and is used to perform operations using compressed gas in the gas storage device 410.

[0103] According to the above-mentioned detection device 300 for pneumatic systems.

[0104] This application provides an engineering vehicle that includes the aforementioned pneumatic system.

[0105] This application also provides a machine-readable storage medium storing instructions that cause a machine to perform the above-described detection method for a pneumatic system.

[0106] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 5As shown. The computer device includes a processor A01, a network interface A02, memory (not shown), and a database (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A04. The database stores detection data for pneumatic systems. The network interface A02 communicates with external terminals via a network connection. When the processor A01 executes the computer program B02, it implements a detection method for pneumatic systems.

[0107] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0108] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0110] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0112] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0113] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0114] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0115] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0116] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A detection method for a pneumatic system, characterized in that, The pneumatic system comprises a gas storage device, a working mechanism, a gas compression device and a differential pressure switch, the gas storage device is connected with the working mechanism and the gas compression device respectively, the gas compression device is used for providing compressed gas for the gas storage device, the gas storage device is used for storing the compressed gas, and the differential pressure switch is used for controlling the start and stop of the gas compression device, and the detection method comprises: controlling the differential pressure switch to close, so as to control the gas compression device to start working; in the case that the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to a first pressure, the differential pressure switch is opened, so as to control the gas compression device to suspend working; detecting whether the working mechanism is working; in the case that it is determined that the working mechanism is in the working state and the differential pressure switch detects that the pressure of the gas storage device is less than a second pressure, the differential pressure switch is closed again, so as to control the gas compression device to start working, wherein the first pressure is greater than the second pressure; in the case that the differential pressure switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the differential pressure switch is opened again, and a first time length consumed by the differential pressure switch from being closed again to being opened again is acquired; in the case that the first time length is greater than a first preset time length, it is determined that the pneumatic system is abnormal; wherein, in the case that the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to a first pressure, the differential pressure switch is opened, so as to control the gas compression device to suspend working, comprising: in the case that the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to a first pressure, the differential pressure switch is opened, so as to control the gas compression device to suspend working, comprising: acquiring a second time length consumed by the differential pressure switch from being closed to being opened in the case that the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to a first pressure, the differential pressure switch is opened; in the case that the second time length is greater than a second preset time length, it is determined that the pneumatic system is abnormal; 2. The detection method for a pneumatic system according to claim 1, characterized in that, in the case that the second time length is less than or equal to the second preset time length, it is determined that the pneumatic system is normal, and the gas compression device is controlled to suspend working. The detection method further comprises:

3. The detection method for a pneumatic system according to claim 1, characterized in that, in the case that the first time length is less than or equal to the first preset time length, it is determined that the pneumatic system is normal. The detection method further comprises: in the case that the differential pressure switch is closed again to control the gas compression device to start working, a first working time length of the gas compression device in this working is acquired in real time; in the case that the first working time length is greater than the first preset time length and the differential pressure switch is not opened again, it is determined that the pneumatic system is abnormal; 4. The detection method for a pneumatic system according to any one of claims 1 to 3, characterized in that, in the case that the first working time length is less than or equal to the first preset time length and the differential pressure switch is opened again, it is determined that the pneumatic system is normal. The first preset time length is a first standard time length, which refers to a time length between a starting time point at which the differential pressure switch is closed when it is detected that the pressure of the gas storage device is less than the second pressure and an ending time point at which the differential pressure switch is opened when it is detected that the pressure of the gas storage device is greater than the first pressure in the case that the pneumatic system is normal; or The first preset time length is a sum of the first standard time length and a first preset redundancy time length.

5. The detection method for a pneumatic system according to claim 1, characterized in that, The detection method further comprises: In a case where it is determined that the work mechanism is not in the working state and the differential pressure switch is closed again, it is determined that the pneumatic system is abnormal.

6. The detection method for a pneumatic system according to claim 1, characterized in that, In a case where the differential pressure switch is closed to control the gas compression device to start working, a second working time length of the gas compression device in this time is acquired in real time; In a case where the second working time length is less than or equal to a second preset time length and the differential pressure switch is opened in a case where the differential pressure switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, it is determined that the pneumatic system is normal, and the gas compression device is controlled to stop working; In a case where the second working time length is greater than the second preset time length and the differential pressure switch is not opened, it is determined that the pneumatic system is abnormal. The second preset time length is a second standard time length, which is a standard time length between a starting time point at which the differential pressure switch is closed when the pressure of the gas storage device is detected to be zero and an ending time point at which the differential pressure switch is opened when the pressure of the gas storage device is detected to be greater than the first pressure in a case where the pneumatic system is normal.

7. A detection method for a pneumatic system according to claim 1 or 6, characterized in that, Or The second preset time length is a sum of the second standard time length and a second preset redundancy time length. Comprise:

8. A pneumatic system, characterized by A gas storage device for storing compressed gas; A gas compression device connected with the gas storage device for providing compressed gas for the gas storage device; A differential pressure switch connected with the gas storage device for controlling start and stop of the gas compression device A work mechanism connected with the gas storage device for working through the compressed gas in the gas storage device; A detection device comprising a memory and a processor, the memory is configured to store instructions, the processor is configured to call the instructions from the memory and can realize the detection method for the pneumatic system according to any one of claims 1 to 7 when executing the instructions. Comprise the pneumatic system according to claim 8.

9. An engineering vehicle characterized by, ​

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