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

Abstract

The invention discloses a pneumatic system, a detection method and device for the pneumatic system and a storage medium, and the detection method comprises the steps: when a differential pressure switch detects that the pressure of a gas storage device is greater than or equal to a first pressure, the differential pressure switch is switched off, and a gas compression device is controlled to stop working; detecting whether the operation mechanism is working; when it is determined that the operation mechanism is in the operation state and the pressure difference switch detects that the pressure of the gas storage device is smaller than second pressure, the pressure difference switch is closed again to control the gas compression device to start working, and the first pressure is larger than the second pressure; when the pressure difference switch detects that the pressure of the gas storage device is larger than or equal to the first pressure again, the pressure difference switch is switched off again, and first duration consumed from the time when the pressure difference switch is switched on again to the time when the pressure difference switch is switched off again is obtained; and under the condition that the first duration is larger than the first preset duration, it is determined that the pneumatic system is abnormal. According to the scheme, the gas compression device can be protected and is prevented from being burnt out due to long-time operation.

Description

Technical Field

[0001] The present application relates to the technical field of engineering vehicles, and in particular to a pneumatic system, a detection method, a device and a storage medium for the pneumatic system. Background Art

[0002] At present, most sanitation vehicles need to control the cylinder through electromagnetic valves to perform some key actions, such as lifting and adapting the sweeping disc, lifting and adapting the rolling sweeper or suction nozzle, and opening and closing the high-pressure waterway. Usually, the pneumatic system of the chassis of some small-tonnage vehicles consists of a micro air compressor and a gas tank. The air compressor starts working after power is turned on, generating high-pressure gas, which is stored in the gas tank. However, since the air compressor needs to move at high speed when generating high-pressure gas, it will generate a lot of heat, so the air compressor cannot operate for a long time. When the single operation time of the air compressor exceeds the maximum value it can withstand, the air compressor is at risk of burning out. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a pneumatic system, a detection method, a device and a storage medium for a pneumatic system, so as to solve the technical problem in the prior art that there is a risk of burning out of an air compressor during long-term operation.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a detection method for a pneumatic system, the pneumatic system includes a gas storage device, an operating mechanism, a gas compression device and a pressure difference switch, the gas storage device is connected to the operating mechanism and the gas compression device respectively, the gas compression device is used to provide compressed gas to the gas storage device, the gas storage device is used to store compressed gas, and the pressure difference switch is used to control the start and stop of the gas compression device. The detection method includes:

[0005] Control the pressure difference switch to close, so as to control the gas compression device to start working;

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

[0007] Check whether the operating mechanism is operating;

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

[0009] When the pressure differential switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected again, and a first time length from the time when the pressure differential switch is closed again to the time when it is disconnected again is obtained;

[0010] When the first time period is greater than the first preset time period, it is determined that an abnormality exists in the pneumatic system.

[0011] In an embodiment of the present application, the detection method further includes: when the first time length is less than or equal to a first preset time length, determining that the pneumatic system is normal.

[0012] In an embodiment of the present application, the first preset time length is a first standard time length, and the first standard time length refers to, when the pneumatic system is normal, the time length from the start time point when the pressure differential switch is closed when it detects that the pressure of the air storage device is less than the second pressure to the end time point when the pressure differential switch is opened when it detects that the pressure of the air storage device is greater than the first pressure; or the first preset time length is the sum of the first standard time length and the first preset redundant time length.

[0013] In an embodiment of the present application, the detection method also includes: when the pressure differential switch is closed again to control the gas compression device to start working, obtaining in real time the first working time of the gas compression device this time; when the first working time is greater than the first preset time and the pressure differential switch is not disconnected 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 pressure differential switch is disconnected again, determining that the pneumatic system is normal.

[0014] In an embodiment of the present application, the detection method further includes: when it is determined that the operating mechanism is not in an operating state and the pressure difference switch is closed again, determining that there is an abnormality in the pneumatic system.

[0015] In an embodiment of the present application, when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to suspend operation, including: when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the pressure differential switch is disconnected, obtaining a second time duration consumed by the pressure differential switch from closing to opening; when the second time duration is greater than a second preset time duration, determining that there is an abnormality in the pneumatic system; when the second time duration is less than or equal to the second preset time duration, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation.

[0016] In an embodiment of the present application, when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to suspend operation, which also includes: when the pressure differential switch is closed to control the gas compression device to start working, the second working time of the gas compression device is obtained in real time; when the second working time is less than or equal to the second preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the pressure differential switch is disconnected, it is determined that the pneumatic system is normal and the gas compression device is controlled to suspend operation; when the second working time is greater than the second preset time and the pressure differential switch is not disconnected, it is determined that there is an abnormality in the pneumatic system.

[0017] In an embodiment of the present application, the second preset time length is the second standard time length, and the second standard time length refers to, when the pneumatic system is normal, the standard time length between the starting time point when the pressure differential switch is closed when it detects that the pressure of the air storage device is zero, and the ending time point when the pressure differential switch is opened when it detects that the pressure of the air storage device is greater than the first pressure; or the second preset time length is the sum of the second standard time length and the second preset redundant time length.

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

[0019] A gas storage device for storing compressed gas;

[0020] A gas compression device connected to the gas storage device for providing compressed gas to the gas storage device;

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

[0022] An operating mechanism, connected to the gas storage device, and used for operating by using the compressed gas in the gas storage device;

[0023] The detection device comprises a memory and a processor, wherein the memory is configured to store instructions, and the processor is configured to call instructions from the memory and implement the above-mentioned detection method for a pneumatic system when executing the instructions.

[0024] A third aspect of the present application provides an engineering vehicle, comprising the above-mentioned pneumatic system.

[0025] Through the above scheme, the pressure differential switch is controlled to close to control the gas compression device to start working; when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to stop working; detect whether the operating mechanism is working; when it is determined that the operating mechanism is in the operating state and the pressure differential switch detects that the pressure of the gas storage device is less than the second pressure, the pressure differential switch is closed again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure; when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure again, the pressure differential switch is disconnected again, and the first time length consumed from the pressure differential switch closing again to the pressure differential switch opening again is obtained; when the first time length is greater than the first preset time length, it is determined that the pneumatic system is abnormal. In the above scheme, the pressure of the gas storage device is detected by closing and disconnecting the pressure differential switch, and the start and stop of the gas compression device are controlled. In addition, based on the operating state of the operating mechanism, combined with the comparison result of the working time required by the gas compression device and the working time of the body compression device during actual working, when it is found that the body compression device is working abnormally, it is powered off to protect it and stop the body compression device. Without adding additional sensors, the gas compression device is protected based on time logic to prevent it from burning out due to long-term operation.

[0026] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0028] Figure 1 A schematic diagram of a process flow of a detection method for a pneumatic system according to an embodiment of the present application is schematically shown;

[0029] Figure 2 A schematic diagram of a process flow of a detection method for a pneumatic system according to a specific embodiment of the present application is shown;

[0030] Figure 3 A structural block diagram of a detection device for a pneumatic system according to an embodiment of the present application is schematically shown;

[0031] Figure 4 A structural block diagram of a pneumatic system according to an embodiment of the present application is schematically shown;

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

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] Figure 1 The following schematically shows a flow chart of a detection method for a pneumatic system according to an embodiment of the present application. Figure 1 As shown, the embodiment of the present application provides a detection method for a pneumatic system, the pneumatic system includes a gas storage device, an operating mechanism, a gas compression device and a pressure difference switch, the gas storage device is connected to the operating mechanism and the gas compression device respectively, the gas compression device is used to provide compressed gas to the gas storage device, the gas storage device is used to store compressed gas, and the pressure difference switch is used to control the start and stop of the gas compression device. The detection method may include the following steps:

[0037] It can be understood that the pneumatic system refers to the use of an air compressor to convert the mechanical energy output by an electric motor or other motive force into the pressure energy of air, and then through the action of the control element, the pressure energy is converted into the mechanical energy of linear motion or rotary motion through the actuator, thereby completing various actions and performing work externally. Pneumatic systems are usually installed on engineering equipment, such as small sanitation vehicles. Its chassis usually does not have an air source, so when pneumatic control is required, an electric-driven miniature gas compression device, a gas storage device, and a pressure difference switch are usually used to provide high-pressure gas to control the swing of the spray bar, the opening and closing of the high-pressure waterway, etc. When the gas compression device is started, it will continuously output the compressed high-pressure gas to the gas storage device and the operating mechanism of the pneumatic system connected behind. Among them, the gas compression device can be an air compressor, and the gas storage device can refer to a gas storage tank. The operating mechanism can refer to a sweeping disc, a high-pressure waterway, etc. The high-pressure gas from the gas storage tank drives the cylinder and the water valve. However, due to the high integration of the electric-driven micro air compressor and the need for high-speed movement when generating high-pressure gas, a large amount of heat will be generated, so the micro air compressor cannot operate for a long time. When the single operation time of the air compressor exceeds the maximum value it can withstand, the air compressor is at risk of burning out. The differential pressure switch can be used to control the temporary start and stop of the gas compression device to limit the continuous operation of the gas compression device. When the pressure of the entire gas storage device reaches the set upper limit of the differential pressure switch, the differential pressure switch is disconnected, the gas compression device loses power and stops working. After the operating mechanism has been working for a period of time, the pressure in the gas storage device is lower than the lower limit of the differential pressure switch, the differential pressure switch is connected, the air compressor is powered on, and starts working until the upper limit of the differential pressure switch is reached.

[0038] S102, controlling the pressure difference switch to close, so as to control the gas compression device to start working.

[0039] It can be understood that the differential pressure switch is in a normally closed state. Before the pneumatic system is started, the pressure in the gas storage device can be considered to be zero. The controller needs to first control the differential pressure switch to close so that the gas compression device can be powered on and start working. The differential pressure switch is a device used to monitor the pressure difference changes between two different positions in the air flow or liquid flow. It uses internal sensing elements to detect the pressure difference changes in the pipeline to achieve control and alarm functions. The differential pressure switch usually consists of an elastic diaphragm and a micro switch. When the monitored medium is applied to the elastic diaphragm, it will deform, which in turn triggers the micro switch to switch the signal, so that the circuit can be opened, closed or converted.

[0040] S104, when the pressure difference switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure difference 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 pressure limit that triggers the pressure differential switch to disconnect. The pressure differential switch includes a mechanical pressure differential switch and an electronic pressure differential switch. The working principle of the mechanical pressure differential switch can be to trigger the opening or closing of the pressure differential switch when the pressure reaches the set pressure value through the physical mechanism of the mechanical structure. The working principle of the electronic pressure differential switch is to detect the set pressure value through an electronic pressure sensor and control the opening or closing of the pressure differential switch. The mechanical pressure differential switch can work without any auxiliary power supply, and the electronic pressure differential switch can change the delay time, output signal, dead zone adjustability, adjustment ratio, etc. through adjustment.

[0042] In an embodiment of the present application, when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to suspend operation, including: when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the pressure differential switch is disconnected, obtaining a second time duration consumed by the pressure differential switch from closing to opening; when the second time duration is greater than a second preset time duration, determining that there is an abnormality in the pneumatic system; when the second time duration is less than or equal to the second preset time duration, determining that the pneumatic system is normal, and controlling the gas compression device to suspend operation.

[0043] It can be understood that after the pressure differential switch is controlled to be closed, the gas compression device starts to work to provide compressed gas to the gas storage device, so that the pressure of the gas storage device gradually increases. When the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is triggered to disconnect, and the gas compression device loses power. The controller can obtain the second time taken by the pressure differential switch from closing to disconnecting. That is, the second time refers to the actual time taken by the gas compression device to increase the pressure of the gas storage device from zero to the first pressure. The second preset time refers to the time threshold set by the technician for the pressure of the gas storage device to rise from zero to the first pressure based on the normal operation of the pneumatic system. When the second time is less than or equal to the second preset time, the pressure of the gas storage device has reached the first pressure, then it can be determined that the pneumatic system is normal, and the pressure differential switch is triggered to disconnect, and the gas compression device is controlled to suspend operation. When the second time is greater than the second preset time, it is determined that there is an abnormality in the pneumatic system. In the 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 the maximum value it can withstand. However, if there is leakage due to wear of the pneumatic system pipelines or damage of components, the high-pressure gas generated by the air compressor will continue to leak. Therefore, the pressure in the gas tank cannot reach the upper limit value (first pressure) of the pressure difference switch within the second preset time, which will cause the air compressor to continue to work and there is a risk of burning out. Therefore, if the second time is longer than the second preset time, not only is it necessary to control the pneumatic system to stop working and cut off the power to the gas compression device, but also to issue a warning prompt to remind the technicians to inspect the pneumatic system. Abnormal conditions of the pneumatic system include but are not limited to: wear and leakage of the pneumatic system pipelines, damage to components, and blockage of the air inlet.

[0044] In an embodiment of the present application, when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to suspend operation, which also includes: when the pressure differential switch is closed to control the gas compression device to start working, the second working time of the gas compression device is obtained in real time; when the second working time is less than or equal to the second preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the pressure differential switch is disconnected, it is determined that the pneumatic system is normal and the gas compression device is controlled to suspend operation; when the second working time is greater than the second preset time and the pressure differential switch is not disconnected, it is determined that there is an abnormality in the pneumatic system.

[0045] It can be understood that the second working time refers to the time that the gas compression device continues to work after starting when the pressure of the gas storage device is zero. When the second working time is less than or equal to the second preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the pressure differential switch is disconnected, it is determined that the pneumatic system is normal, and the gas compression device is controlled to stop working. However, if there is an abnormality in the pneumatic system, the high-pressure gas generated by the compressor will continue to leak, so the pressure in the gas storage tank cannot reach the upper limit value (first pressure) of the pressure differential switch, which will cause the air compressor to continue to work and there is a risk of burning out. Then, if the second working time is greater than the second preset time, at this time the pressure differential switch does not detect that the pressure of the gas storage device is greater than or equal to the first pressure, resulting in the pressure differential switch not being triggered to disconnect, it can be directly judged that there is an abnormality in the pneumatic system. Therefore, if the second working time is greater than the second preset time, not only does the pneumatic system need to stop working and the gas compression device need to be powered off, but also a warning prompt needs to be issued to prompt the technicians to inspect the pneumatic system.

[0046] In an embodiment of the present application, the second preset time length is the second standard time length, and the second standard time length refers to, when the pneumatic system is normal, the standard time length between the starting time point when the pressure differential switch is closed when it detects that the pressure of the air storage device is zero, and the ending time point when the pressure differential switch is opened when it detects that the pressure of the air storage device is greater than the first pressure.

[0047] In an embodiment of the present application, the second preset duration is the sum of the second standard duration and the second preset redundant duration.

[0048] It is understandable that with the use of the air pump of the gas compression equipment, the air pumping efficiency will be reduced, so a second preset redundant time for the air pumping time is set, that is, the time redundancy value required for the pressure of the air storage device to rise from 0 bar to the first pressure.

[0049] S106, detecting whether the operating mechanism is operating.

[0050] It can be understood that after the gas compression device stops working due to the disconnection of the pressure difference switch, it can be further detected whether the operating mechanism is working. If the operating mechanism is working, the compressed gas in the gas storage device is used to work, and the pressure of the gas storage device will gradually decrease. If the operating mechanism is not working, the pressure of the gas storage device will remain unchanged.

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

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

[0053] In an embodiment of the present application, the detection method further includes: when it is determined that the operating mechanism is not in an operating state and the pressure difference switch is closed again, determining that there is an abnormality in the pneumatic system.

[0054] It is understandable that if the operating mechanism is not operating, the pressure of the gas storage device will remain unchanged, and the differential pressure switch will not close if there is no abnormality in the pneumatic system. Once the differential pressure switch is closed again, it means that the pressure in the gas storage device is less than or equal to the second pressure, and it can be considered that there is an abnormality in the pneumatic system, and there may be problems such as air leakage. Therefore, if the operating mechanism is not in operation and the differential pressure switch is closed again, not only is it necessary to control the pneumatic system to stop working, but also to issue a warning prompt to prompt the technicians to inspect the pneumatic system.

[0055] S110, when the pressure differential switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected again, and a first time length consumed from the pressure differential switch being closed again to being disconnected again is obtained.

[0056] It can be understood that after the pressure of the gas storage device drops to the second pressure due to the operation of the operating mechanism, the pressure differential switch is triggered to close again, so that the gas compression device works again to provide compressed gas to the gas storage device, and the pressure of the gas storage device is restored again. Then, when the pressure differential switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is triggered to open again. Then, the first time length consumed from the reclosure of the pressure differential switch to the re-opening can be obtained. It can be understood that the first time length refers to the actual time length consumed by the gas compression device to increase the pressure of the gas storage device from the second pressure to the first pressure.

[0057] S112: When the first time period is greater than a first preset time period, it is determined that an abnormality exists in the pneumatic system.

[0058] It can be understood that the first preset time duration refers to the time duration threshold set by the technician for the pressure of the gas storage device to rise from the second pressure to the first pressure based on the normal operation of the pneumatic system. When the first time duration is greater than the first preset time duration, it is determined that there is an abnormality in the pneumatic system. This is because the pressure in the gas tank cannot reach the upper limit value (first pressure) of the differential pressure switch from the second pressure within the first preset time duration, which causes the air compressor to continue to work and there is a risk of burning out. Therefore, if the first time duration is greater than the first preset time duration, not only is it necessary to control the pneumatic system to stop working and cut off the power to the gas compression device, but it is also necessary to issue a warning prompt to prompt the technician to inspect the pneumatic system.

[0059] Through the above scheme, the pressure differential switch is controlled to close to control the gas compression device to start working; when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to stop working; detect whether the operating mechanism is working; when it is determined that the operating mechanism is in the operating state and the pressure differential switch detects that the pressure of the gas storage device is less than the second pressure, the pressure differential switch is closed again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure; when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure again, the pressure differential switch is disconnected again, and the first time length consumed from the pressure differential switch closing again to the pressure differential switch opening again is obtained; when the first time length is greater than the first preset time length, it is determined that the pneumatic system is abnormal. In the above scheme, the pressure of the gas storage device is detected by closing and disconnecting the pressure differential switch, and the start and stop of the gas compression device are controlled. In addition, based on the operating state of the operating mechanism, combined with the comparison result of the working time required by the body compression device and the working time of the body compression device during actual working, when it is found that the body compression device is working abnormally, it is powered off to protect it and stop the body compression device. Without adding additional sensors, the gas compression device is protected based on time logic to prevent it from burning out due to long-term operation.

[0060] In an embodiment of the present application, the detection method further includes: when the first time length is less than or equal to a first preset time length, determining that the pneumatic system is normal.

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

[0062] In an embodiment of the present application, the first preset time length is a first standard time length, and the first standard time length refers to, when the pneumatic system is normal, the time length between the starting time point when the pressure differential switch is closed when it detects that the pressure of the air storage device is less than the second pressure, and the ending time point when the pressure differential switch is opened when it detects that the pressure of the air storage device is greater than the first pressure.

[0063] In an embodiment of the present application, the first preset duration is the sum of the first standard duration and the first preset redundant duration.

[0064] It is understandable that with the use of the air pump of the gas compression equipment, the inflation efficiency will be reduced, so a first preset redundant time for the inflation time is set, that 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 an embodiment of the present application, the detection method also includes: when the pressure differential switch is closed again to control the gas compression device to start working, obtaining in real time the first working time of the gas compression device this time; when the first working time is greater than the first preset time and the pressure differential switch is not disconnected 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 pressure differential switch is disconnected again, determining that the pneumatic system is normal.

[0066] It can be understood that the first working time refers to the time duration of continuous operation of the gas compression device after the pressure of the gas storage device is started when the pressure of the gas storage device is the second pressure. When the pressure differential switch is closed again to control the gas compression device to start working, the pressure of the gas storage device gradually rises from the second pressure, so the first working time of the gas compression device can be obtained in real time. When the first working time is less than the first preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, so that the pressure differential switch is disconnected again, it is determined that the pneumatic system is normal, and the gas compression device is controlled to suspend work. However, if there is an abnormality in the pneumatic system, the high-pressure gas generated by the compressor will continue to leak, so the pressure in the gas storage tank can never reach the upper limit value (first pressure) of the pressure differential switch, which will cause the air compressor to continue to work and there is a risk of burning. Then, if the first working time is greater than the first preset time, at this time, the pressure differential switch does not detect that the pressure of the gas storage device is greater than or equal to the first pressure, resulting in the pressure differential switch not being triggered to disconnect again, it can be directly judged that there is an abnormality in the pneumatic system. Therefore, if the first working time is longer than the first preset time, not only does the pneumatic system need to stop working and the gas compression device need to be powered off, but a warning prompt also needs to be issued to prompt the technicians to inspect the pneumatic system to check for leaks, damage to the air compressor, or blockage in the air inlet.

[0067] In an embodiment of the present application, the detection method further includes: when it is determined that there is an abnormality in the pneumatic system, controlling the gas compression device to stop working and issuing a warning message.

[0068] Figure 2 The following schematically shows a flow chart of a detection method for a pneumatic system according to an embodiment of the present application. Figure 2As shown, in an embodiment of the present application, the pneumatic system includes a gas storage device, an operating mechanism, a gas compression device and a pressure differential switch. The gas storage device is connected to the operating mechanism and the gas compression device respectively. The gas compression device is used to provide compressed gas to the gas storage device, and the gas storage device is used to store compressed gas. The pressure differential switch is used to control the start and stop of the gas compression device. The pneumatic system can be installed on engineering vehicles, such as sanitation vehicles, and the pneumatic system is used to control the swinging of the spray rod, the opening and closing of the high-pressure waterway, etc. Before the whole vehicle performs actual operation, when the gas compression device, the gas storage device, the pressure differential switch and the pipeline of the pneumatic system are connected, the pressure differential switch is closed, and the gas compression device is started to start the operation. Before that, the pressure in the entire gas storage device is 0 bar. The gas compression device is recorded to increase the pressure in the gas storage device from 0 bar to the first pressure, triggering the second standard time T1 required for the pressure differential switch to disconnect. At this time, the pressure differential switch is disconnected, the gas compression device loses power, and the work is suspended. Furthermore, a portion of the pressure in the gas storage device is released until it drops to the second pressure, triggering the pressure differential switch to close, and the gas compression device is powered on to start working until the pressure rises to the first pressure again, triggering the pressure differential switch to disconnect, and the gas compression device loses power and suspends operation. The first standard time T2 required for the gas compression device to increase the pressure in the gas storage device from the second pressure to the first pressure and trigger the pressure differential switch to disconnect is recorded. In addition, the maximum value of the gas compression device that can operate for a single long time can also be obtained, recorded as T3. It can be understood that the maximum value T3 of a single long-term operation can refer to the time it takes for the gas compression device to start working until it burns out.

[0069] As the air pump is used, the air pumping efficiency will decrease. Therefore, the redundant value of the air compressor air pumping time is set. The first preset redundant time required when the pressure of the air storage device rises from 0 bar to the upper limit value of the pressure differential switch (first pressure) is t1, and the second preset redundant time required when the pressure in the entire pneumatic system rises from the lower limit value of the pressure differential switch (second pressure) to the upper limit value of the pressure differential switch (first pressure) is t2. Then, the conditions that need to be met between the above multiple time values ​​are: T2+t1 <T3、T1+t2<T3。

[0070] The above-mentioned first standard time length T2, second standard time length T1, first preset redundant time length t1, second preset redundant time length t2, maximum value T3 of single long-time operation, and the relationship between them are all recorded in the memory. When the whole vehicle starts to operate, the pressure differential switch of the gas system is closed, and the gas compression device starts to work. The second time length from closing to disconnecting of the pressure differential switch is recorded by the controller and recorded as CT1. When CT1>T2+t1, the controller can determine that the pneumatic system of the vehicle is leaking. Before the continuous working time of the gas compression device reaches the maximum value T3, the power supply of the gas compression device is actively disconnected, the work is stopped, and the vehicle operator is reminded to check the pneumatic system to see if there is a leak, whether the gas compression device is damaged, whether the air inlet is blocked, etc. If CT1<T2+t1, the gas storage device reaches the first pressure, triggering the pressure differential switch to disconnect, causing the gas compression device to lose power. At this time, it can be determined whether the operating mechanism is operating. If the operating mechanism does not move, that is, the vehicle does not use high-pressure gas to drive the cylinder or water valve during operation, but the air pressure of the gas storage device drops to the lower limit value (second pressure), triggering the pressure difference switch to close again, and the gas compression device is powered on and starts working, it can be judged that the pneumatic system is abnormal and the pneumatic system needs to be powered off for inspection. If the operating mechanism moves, that is, the vehicle uses high-pressure gas to drive the cylinder or water valve during operation, then, when the air pressure of the gas storage device drops to the lower limit value (second pressure), the pressure difference switch is triggered to close again, so that the gas compression device is powered on and starts working again. Then, the time from the opening to the closing of the pressure difference switch at this time can be recorded as CT2. When CT2>T1+t2, the controller can determine that the pneumatic system of the vehicle has been in a leaking state. Before the continuous working time of the air compressor reaches the maximum value T3, the power supply to the gas compression device is actively disconnected to stop the gas compression device from working. In addition, the vehicle operator is reminded to check the pneumatic system to see if there is leakage, whether the air compressor is damaged, whether the air inlet is blocked, etc.

[0071] The above scheme compares the working time required by the air compressor under different working conditions with the working time of the air compressor during actual working. When the air compressor is found to be working abnormally, it will be powered off to protect it, stop the air compressor, and remind the operator through the controller to actively troubleshoot the fault of the pneumatic system. Without adding additional sensors, the function of pneumatic pipeline leakage warning is realized through time logic control, thereby protecting the air compressor and preventing it from burning out due to long-term operation.

[0072] Figure 1 FIG. 1 is a flow chart of a detection method for a pneumatic system in one embodiment. It should be understood that although Figure 1The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed 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 part of the sub-steps or stages of other steps.

[0073] Figure 3 The structure block diagram of a detection device for a pneumatic system according to an embodiment of the present application is schematically shown. Figure 3 As shown, the embodiment of the present application provides a detection device 300 for a pneumatic system, which may include:

[0074] Memory 310, configured to store instructions;

[0075] The processor 320 is configured to call instructions from the memory 310 and implement the above-mentioned detection method for the pneumatic system when executing the instructions.

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

[0077] Control the pressure differential switch to close to control the gas compression device to start working; when the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to suspend working; detect whether the operating mechanism is working; when it is determined that the operating mechanism is in an operating state and the pressure differential switch detects that the pressure of the gas storage device is less than the second pressure, the pressure differential switch is closed again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure; when the pressure differential switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected again, and the first time length spent from the pressure differential switch closing again to opening again is obtained; when the first time length is greater than the first preset time length, it is determined that there is an abnormality in the pneumatic system.

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

[0079] When the first time period is less than or equal to the first preset time period, it is determined that the pneumatic system is normal.

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

[0081] The first preset time length is the first standard time length, which refers to, when the pneumatic system is normal, the time length from the start time point when the pressure differential switch is closed when it detects that the pressure of the air storage device is less than the second pressure, to the end time point when the pressure differential switch is opened when it detects that the pressure of the air storage device is greater than the first pressure.

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

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

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

[0085] When the pressure differential switch is closed again to control the gas compression device to start working, the first working time of the gas compression device is obtained in real time; when the first working time is greater than the first preset time and the pressure differential switch is not disconnected again, it is determined 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 pressure differential switch is disconnected again, it is determined that the pneumatic system is normal.

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

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

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

[0089] When the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the pressure differential switch is disconnected, the second time duration consumed by the pressure differential switch from closing to opening is obtained; when the second time duration is greater than the second preset time duration, it is determined that there is an abnormality in the pneumatic system; when the second time duration is less than or equal to the second preset time duration, it is determined that the pneumatic system is normal and the gas compression device is controlled to suspend operation.

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

[0091] When the pressure differential switch is closed to control the gas compression device to start working, the second working time of the gas compression device is obtained in real time; when the second working time is less than or equal to the second preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the pressure differential switch is disconnected, it is determined that the pneumatic system is normal, and the gas compression device is controlled to suspend working; when the second working time is greater than the second preset time, and the pressure differential switch is not disconnected, it is determined that there is an abnormality in the pneumatic system.

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

[0093] The second preset time length is the second standard time length, which refers to, when the pneumatic system is normal, the standard time length between the starting time point when the pressure differential switch closes when it detects that the pressure of the air storage device is zero, and the ending time point when the pressure differential switch opens when it detects that the pressure of the air storage device is greater than the first pressure.

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

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

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

[0097] When it is determined that there is an abnormality in the pneumatic system, the gas compression device is controlled to stop working and a warning message is issued.

[0098] Figure 4 The structure block diagram of a pneumatic system according to an embodiment of the present application is schematically shown. Figure 4 As shown, the embodiment of the present application provides a pneumatic system 400, which may include:

[0099] A gas storage device 410, for storing compressed gas;

[0100] A gas compression device 420 connected to the gas storage device 410 for providing compressed gas to the gas storage device 410;

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

[0102] The operating mechanism 440 is connected to the gas storage device 410 and is used to perform the operation by using the compressed gas in the gas storage device 410;

[0103] According to the above detection device 300 for a pneumatic system.

[0104] An embodiment of the present application provides an engineering vehicle, comprising the above-mentioned pneumatic system.

[0105] An embodiment of the present application also provides a machine-readable storage medium, on which instructions are stored, and the instructions are used to enable a machine to execute the above-mentioned detection method for a pneumatic system.

[0106] In one embodiment, a computer device is provided. The computer device 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, a memory (not shown in the figure) and a database (not shown in the figure) connected through a system bus. Among them, the processor A01 of the computer device is used to provide computing and control capabilities. The memory of the computer device includes an 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 in the figure). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A04. The database of the computer device is used to store detection data for a pneumatic system. The network interface A02 of the computer device is used to communicate with an external terminal through a network connection. When the computer program B02 is executed by the processor A01, a detection method for a pneumatic system is implemented.

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

[0108] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0109] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0110] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0111] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions 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] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0114] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules 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 technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0115] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0116] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A detection method for a pneumatic system, characterized in that: The pneumatic system includes a gas storage device, an operating mechanism, a gas compression device and a pressure difference switch. The gas storage device is connected to the operating mechanism and the gas compression device respectively. The gas compression device is used to provide compressed gas to the gas storage device. The gas storage device is used to store the compressed gas. The pressure difference switch is used to control the start and stop of the gas compression device. The detection method includes: Controlling the pressure difference switch to close, so as to control the gas compression device to start working; When the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected to control the gas compression device to stop working; Detecting whether the operating mechanism is operating; When it is determined that the operating mechanism is in an operating state and the pressure difference switch detects that the pressure of the gas storage device is less than a second pressure, the pressure difference switch is closed again to control the gas compression device to start working, wherein the first pressure is greater than the second pressure; When the pressure differential switch detects again that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure differential switch is disconnected again, and a first time length from the time when the pressure differential switch is closed again to the time when it is disconnected again is obtained; When the first time period is greater than a first preset time period, it is determined that an abnormality exists in the pneumatic system.

2. The detection method for a pneumatic system according to claim 1, characterized in that: The detection method further comprises: When the first time period is less than or equal to the first preset time period, it is determined that the pneumatic system is normal.

3. The detection method for a pneumatic system according to claim 1, characterized in that: The detection method further comprises: When the pressure difference switch is closed again to control the gas compression device to start working, obtaining in real time the first working time of the gas compression device in this working; When the first working time is longer than the first preset time and the pressure difference switch is not disconnected again, it is determined that an abnormality exists in the pneumatic system; When the first operating time is less than or equal to the first preset time and the pressure difference switch is disconnected again, it is determined that the pneumatic system is normal.

4. The detection method for a pneumatic system according to any one of claims 1 to 3, characterized in that: The first preset time length is a first standard time length, which refers to the time length between the start time point when the pressure differential switch detects that the pressure of the gas storage device is less than the second pressure and closes and the end time point when the pressure differential switch detects that the pressure of the gas storage device is greater than the first pressure when the pneumatic system is normal; or The first preset duration is the sum of the first standard duration and the first preset redundant duration.

5. The detection method for a pneumatic system according to claim 1, characterized in that: The detection method further comprises: When it is determined that the operating mechanism is not in the operating state and the pressure difference switch is closed again, it is determined that an abnormality exists in the pneumatic system.

6. The detection method for a pneumatic system according to claim 1, characterized in that: When the pressure difference switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure difference switch is disconnected to control the gas compression device to stop working, which includes: When the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure and the pressure differential switch is disconnected, obtaining a second time length taken for the pressure differential switch to be disconnected from being closed; When the second time period is greater than a second preset time period, determining that an abnormality exists in the pneumatic system; When the second time period is less than or equal to the second preset time period, it is determined that the pneumatic system is normal, and the gas compression device is controlled to stop working.

7. The detection method for a pneumatic system according to claim 1, characterized in that: When the pressure difference switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, the pressure difference switch is disconnected to control the gas compression device to stop working, and further includes: When the pressure difference switch is closed to control the gas compression device to start working, obtaining in real time the second working time of the gas compression device in this working state; When the second working time is less than or equal to the second preset time, and the pressure differential switch detects that the pressure of the gas storage device is greater than or equal to the first pressure, and the pressure differential switch is disconnected, it is determined that the pneumatic system is normal, and the gas compression device is controlled to stop working; When the second operating time is greater than the second preset time and the pressure difference switch is not disconnected, it is determined that an abnormality exists in the pneumatic system.

8. The detection method for a pneumatic system according to claim 6 or 7, characterized in that: The second preset time is a second standard time, which refers to the standard time between the start time point when the pressure differential switch is closed when the pressure of the gas storage device is detected to be zero and the end time point when the pressure differential switch is opened when the pressure of the gas storage device is detected to be greater than the first pressure when the pneumatic system is normal; or The second preset duration is the sum of the second standard duration and the second preset redundant duration.

9. A pneumatic system, characterized in that: include: A gas storage device for storing compressed gas; A gas compression device connected to the gas storage device for providing compressed gas to the gas storage device; A pressure differential switch connected to the gas storage device to control the start and stop of the gas compression device An operating mechanism, connected to the gas storage device, and used to perform operations using the compressed gas in the gas storage device; A detection device comprises a memory and a processor, wherein the memory is configured to store instructions, and the processor is configured to call the instructions from the memory and implement the detection method for a pneumatic system according to any one of claims 1 to 8 when executing the instructions.

10. An engineering vehicle, characterized in that: Comprising a pneumatic system according to claim 9.

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