Floor level automatic detection method and car washing system

Abstract

The application relates to the technical field of car washing platform detection control, and particularly discloses a platform liquid level automatic detection method and a car washing system. The platform liquid level automatic detection method comprises the following steps: controlling a liquid level detection device to detect a liquid level height signal of a platform; acquiring the liquid level height signal and determining a liquid level height according to the acquired liquid level height signal; if the liquid level height is determined to be less than a first preset liquid level height, controlling a sewage pumping device to stop working; if the liquid level height is determined to be greater than a second preset liquid level height and less than a third preset liquid level height, controlling the sewage pumping device to start working; and if the liquid level height is determined to be greater than the third preset liquid level height, controlling the sewage pumping device to start working and controlling a water inlet device to stop working. The application can realize automatic detection of the liquid level height, form linkage control of water supply and sewage discharge, realize closed-loop automatic control operation of a car washing process, prevent the phenomenon of sewage overflow, improve the use experience, and reduce the safety hidden danger caused by sewage overflow.

Description

Technical Field

[0001] This invention relates to the field of car wash platform detection and control technology, specifically to an automatic liquid level detection method and car wash system for the platform. Background Technology

[0002] Currently, common car wash platform equipment typically includes a water collection tank to collect wastewater during car washing. A level gauge is used to monitor the wastewater level in the tank for appropriate drainage control. However, existing car wash platform equipment and related monitoring and control methods can only control the start and stop of the drainage mechanism under normal conditions, lacking closed-loop control. In special circumstances, if the drainage mechanism is not timely and the water level in the collection tank is too high and close to overflow, it is difficult to take countermeasures. This can easily cause wastewater to overflow onto the car wash platform surface, affecting normal car washing operations, resulting in a poor user experience and potential safety hazards. Summary of the Invention

[0003] The main technical problem solved by this invention is that existing car wash platform equipment can only achieve drainage control under normal conditions, lacks emergency measures for special situations when the liquid level is too high, and sewage overflow is very likely to occur if drainage is not timely, which affects the car wash operation and user experience, and also poses certain safety hazards.

[0004] One embodiment of the first aspect of this application provides an automatic liquid level detection method for a car wash system in a basement or parking garage. The car wash system includes a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device. The automatic liquid level detection method for the platform includes:

[0005] The control device controls the liquid level detection device to detect the liquid level height signal on the platform;

[0006] The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0007] If the control device determines that the liquid level is lower than the first preset liquid level, the control device issues a stop working command for the sludge pumping device to stop working.

[0008] If the control device determines that the liquid level is greater than the second preset liquid level and less than the third preset liquid level, the control device issues a command to start the pumping device and controls the pumping device to start working.

[0009] If the control device determines that the liquid level is higher than the third preset liquid level, the control device will issue a start working command for the sludge pumping device and a stop working command for the water inlet device, thereby controlling the sludge pumping device to start working and controlling the water inlet device to stop working.

[0010] The first preset liquid level height, the second preset liquid level height, and the third preset liquid level height increase sequentially.

[0011] In one embodiment, the control device controls the liquid level detection device to detect the liquid level height signal of the platform, including:

[0012] The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected electrical parameter value corresponding to the liquid level and the calibration reference value;

[0013] The control device acquires a liquid level signal and determines the liquid level based on the acquired liquid level signal, including:

[0014] The control device receives the first electrical parameter from the liquid level detection device;

[0015] The control device determines the liquid level height based on the change of the first electrical parameter relative to a preset electrical parameter threshold.

[0016] In one embodiment, the liquid level detection device is a capacitive detector and has multiple detection electrodes. Each detection electrode has a different preset liquid level height and a corresponding calibration reference value. The preset liquid level height includes a first preset liquid level height, a second preset liquid level height, and a third preset liquid level height. The first electrical parameter is the capacitance difference between the capacitance value generated between the liquid surface and the detection electrode and the calibration reference value.

[0017] The control device determines the liquid level height based on the change of a first electrical parameter relative to a preset electrical parameter threshold, including:

[0018] If the control device determines that the first electrical parameter is greater than the electrical parameter threshold, then it calculates the duration of the first electrical parameter.

[0019] If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0020] In one embodiment, the first preset liquid level is located at 10% to 20% of the total depth of the collection tank. When the liquid level is less than the first preset liquid level, it corresponds to the low-level protection position, and the control device issues a command to stop the sludge pumping device. The second preset liquid level is located at 25% to 55% of the total depth of the collection tank. When the liquid level is greater than the second preset liquid level but less than the third preset liquid level, it corresponds to the high-level start position, and the control device issues a command to start the sludge pumping device. The third preset liquid level is located at 75% to 90% of the total depth of the collection tank. When the liquid level is greater than the third preset liquid level, it corresponds to the full-level fault position, and the control device issues a command to start the sludge pumping device and a command to stop the water inlet device.

[0021] In one embodiment, the drainage speed of the sludge suction device in the high-level start position is the first drainage speed; the drainage speed of the sludge suction device in the full-level fault position is the second drainage speed; wherein, the second drainage speed is greater than the first drainage speed.

[0022] In one embodiment, the car wash system further includes a prompting device; in the full liquid level fault position, the control device controls the prompting device to output a first prompting signal; wherein, the first prompting signal includes at least one of an audible prompt, a graphic prompt, and a warning light prompt.

[0023] In one embodiment, the preset liquid level height further includes a fourth preset liquid level height, which is located at 65% to 75% of the total depth of the collection tank; when the liquid level height is greater than the fourth preset liquid level height and less than the third preset liquid level height, the control device controls the prompting device to output a second prompt signal; wherein, the second prompt signal includes at least one of sound prompt, graphic prompt, and alarm light prompt.

[0024] In one embodiment, the liquid level detection device includes: a mounting housing, the bottom of which is detachably connected to a base, the bottom of which has an opening facing the liquid collection tank; a PCB detection board, wherein the detection electrodes are capacitive detection elements connected inside the mounting housing, the detection end of the PCB detection board passes through the opening and extends into the liquid collection tank, and multiple detection electrodes are disposed at the detection end of the PCB detection board; and a protective shell, which is a waterproof and sealed structure and is wrapped around the outer surface of the PCB detection board.

[0025] In one embodiment, there are multiple liquid level detection devices, and the multiple liquid level detection devices are arranged at intervals along a preset direction of the liquid collection tank; wherein, during the liquid level detection process, when there is a time difference between the liquid level height signals output by the multiple liquid level detection devices, the liquid level height in the liquid collection tank is determined based on the liquid level height signal of the liquid level detection device that completes the detection first.

[0026] In one embodiment, the liquid level detection device includes at least one of a float-type liquid level gauge, an electrode-type liquid level sensor, a capacitive liquid level sensor, an ultrasonic liquid level sensor, a hydrostatic liquid level sensor, a photoelectric liquid level sensor, and a radar-type liquid level sensor.

[0027] One embodiment of the second aspect of this application provides an automatic liquid level detection method for a car wash system in a basement or parking garage. The car wash system includes a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device. The automatic liquid level detection method for the platform includes:

[0028] The control device controls the liquid level detection device to detect the liquid level height signal on the platform;

[0029] The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0030] The control device determines the gear range of the liquid level based on the liquid level height; wherein, the gear range includes at least a low gear range to prevent the sludge pump from running dry, a full liquid gear range to prevent sewage overflow, and an adjustable gear range, with the adjustable gear range located between the low gear range and the full liquid gear range.

[0031] The control device generates corresponding action commands based on the determined range of liquid level and sends them to the sludge suction device and / or water inlet device to control the sludge suction device and / or water inlet device to complete the actions corresponding to the action commands.

[0032] In one embodiment, the control device generates a corresponding action command based on the determined range of the liquid level and sends it to the sludge suction device and / or the water inlet device to control the sludge suction device and / or the water inlet device to complete the action corresponding to the action command, including:

[0033] If the control device determines that the liquid level is in the low range, the control device will issue a stop command to the sludge pumping device to stop working.

[0034] If the control device determines that the liquid level is within the adjustable range, the control device will issue a command to start the sludge suction device and control the sludge suction device to start working.

[0035] If the control device determines that the liquid level is in the full liquid range, the control device issues a start command for the sludge pumping device and a stop command for the water inlet device, controlling the sludge pumping device to start working and the water inlet device to stop working.

[0036] In one embodiment, the platform has a liquid collection tank, and a liquid level detection device is used to detect the liquid level height of the liquid collection tank; the low gear range corresponds to the range of 0 to 20% of the total depth of the liquid collection tank; the adjustable gear range corresponds to the range of 25% to 75% of the total depth of the liquid collection tank; and the full liquid gear range corresponds to the range of 75% to 100% of the total depth of the liquid collection tank.

[0037] In one embodiment, the car wash system further includes a prompting device; wherein, if the liquid level is in the full liquid range, the control device controls the prompting device to output a first prompting signal; the first prompting signal includes at least one of an audible prompt, a graphic prompt, and a warning light prompt; and / or, if the liquid level is in an adjustable range and the liquid level is within 65% to 75% of the total depth of the collection tank, the control device controls the prompting device to output a second prompting signal; wherein the second prompting signal includes at least one of an audible prompt, a graphic prompt, and a warning light prompt.

[0038] In one embodiment, the control device controls the liquid level detection device to detect the liquid level height signal of the platform, including:

[0039] The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected electrical parameter value corresponding to the liquid level and the calibration reference value;

[0040] The control device acquires a liquid level signal and determines the liquid level based on the acquired liquid level signal, including:

[0041] The control device receives the first electrical parameter from the liquid level detection device;

[0042] If the control device determines that the first electrical parameter is greater than the preset electrical parameter threshold, it calculates the duration of the first electrical parameter.

[0043] If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0044] One embodiment of the third aspect of this application provides an automatic liquid level detection method for a car wash system in a basement or parking garage. The car wash system includes a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device. The automatic liquid level detection method for the platform includes:

[0045] The control device controls the liquid level detection device to detect the liquid level height signal on the platform;

[0046] The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0047] If the control device determines that the liquid level is below the low liquid level threshold, the control device will issue a stop working command for the sludge pumping device to stop working.

[0048] If the control device determines that the liquid level is higher than the high liquid level threshold, the control device will issue a stop working command for the water inlet device, thus stopping the water inlet device from working.

[0049] In one embodiment, the platform has a liquid collection tank, and a liquid level detection device is used to detect the liquid level height of the liquid collection tank; the low liquid level threshold is located at 10% to 20% of the total depth of the liquid collection tank; and the high liquid level threshold is located at 75% to 90% of the total depth of the liquid collection tank.

[0050] In one embodiment, an intermediate liquid level threshold is provided between the low liquid level threshold and the high liquid level threshold. The intermediate liquid level threshold is located at 25% to 55% of the total depth of the collection tank. If the control device determines that the liquid level is between the intermediate liquid level threshold and the high liquid level threshold, the control device issues a command to start the sludge pumping device and controls the sludge pumping device to start working.

[0051] In one embodiment, the control device controls the liquid level detection device to detect the liquid level height signal of the platform, including: the control device controls the liquid level detection device to detect a first electrical parameter corresponding to the liquid surface in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid surface and the calibration reference value.

[0052] The control device acquires a liquid level signal and determines the liquid level based on the acquired liquid level signal, including:

[0053] The control device receives a first electrical parameter from the liquid level detection device; if the control device determines that the first electrical parameter is greater than a preset electrical parameter threshold, it calculates the duration of the first electrical parameter.

[0054] If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0055] This application provides a car wash system in some embodiments, applied to a basement or building garage. The car wash system includes: a platform for carrying vehicles, and the platform has a collection tank for collecting wastewater from the car wash; a sludge pumping device disposed in the collection tank for discharging wastewater from the collection tank; a liquid level detection device disposed on the platform, with its detection end extending into the collection tank for detecting the liquid level height in the collection tank and generating a corresponding liquid level height signal; a water inlet device for supplying water required for car washing; and a control device communicatively connected to the sludge pumping device, the liquid level detection device, and the water inlet device to determine the liquid level height in the collection tank based on the liquid level height signal from the liquid level detection device, and to control the working state of the sludge pumping device and / or the water inlet device accordingly, so as to execute the automatic liquid level detection method of the platform in any embodiment of the first aspect, or execute the automatic liquid level detection method of the platform in any embodiment of the second aspect, or execute the automatic liquid level detection method of the platform in any embodiment of the third aspect.

[0056] According to the technical solution of the above embodiments, automatic detection of liquid level height can be achieved, and corresponding control operations can be performed on the discharge status of the sewage pumping device and the water supply status of the water inlet device according to different liquid level heights. It can control both the sewage discharge volume and the upstream water supply volume to form a linkage control between water supply and sewage discharge, realizing closed-loop automatic control operation of the car washing process. This can effectively prevent sewage overflow in the collection tank due to untimely sewage discharge, thereby avoiding affecting normal car washing operations, improving the user experience, and reducing safety hazards caused by sewage overflow. Attached Figure Description

[0057] Figure 1 This is a flowchart of an automatic liquid level detection method for a platform according to one embodiment of this application.

[0058] Figure 2This is a schematic block diagram of a car wash system according to one embodiment of this application.

[0059] Figure 3 This is a top view of the platform in one embodiment of this application.

[0060] Figure 4 This is a front view of the platform in one embodiment of this application.

[0061] Figure 5 for Figure 3 A sectional view of the platform along line AA.

[0062] Figure 6 for Figure 5 A partial schematic diagram of the platform.

[0063] Figure 7 This is a schematic diagram of some steps of the automatic liquid level detection method for a platform according to one embodiment of this application.

[0064] Figure 8 This is a schematic diagram of a liquid level detection device in one embodiment of this application.

[0065] Figure 9 This is a top view of a liquid level detection device in one embodiment of this application.

[0066] Figure 10 for Figure 9 A BB-direction cross-sectional view of the liquid level detection device in the middle.

[0067] Figure 11 This is a partially exploded schematic diagram of a liquid level detection device in one embodiment of this application.

[0068] Figure 12 This is a schematic diagram of some steps of the automatic liquid level detection method for a platform according to one embodiment of this application.

[0069] Figure 13 This is a schematic block diagram of a car wash system in another embodiment of this application.

[0070] Figure 14 This is a flowchart of an automatic liquid level detection method for a platform according to another embodiment of this application.

[0071] Figure 15 This is a schematic diagram of some steps of the automatic liquid level detection method for a platform in another embodiment of this application.

[0072] Figure 16 This is a schematic diagram illustrating the steps of an automatic liquid level detection method for a platform in another embodiment of this application.

[0073] Figure 17This is a flowchart of an automatic liquid level detection method for a platform according to another embodiment of this application.

[0074] Figure 18 This is a flowchart of an automatic liquid level detection method for a platform according to another embodiment of this application.

[0075] Figure 19 This is a schematic diagram illustrating the steps of an automatic liquid level detection method for a platform in another embodiment of this application.

[0076] Label Explanation:

[0077] 100 Car Wash System, 1 Platform, 11 Liquid Collection Tank, 111 Outer Frame, 1111 First Side Wall, 1112 Second Side Wall, 1113 Fixing Bracket, 1114 Fixing Bolt, 113 Side Ditch, 121 Outer Grille, 122 Horizontal Ditch Grille, 1221 Bearing Plane, 1222 Trench, 123 Side Ditch Cover, 21 Sewage Pumping Device, 22 Water Inlet Device, 3 Liquid Level Detection Device, 31 Mounting Housing, 311 Opening, 312 Flanged Structure, 32 PCB Detection Board, 321 First Detection Electrode, 322 Second Detection Electrode, 323 Third Detection Electrode, 324 Fourth Detection Electrode, 33 Protective Housing, 4 Control Device, 5 Indication Device.

[0078] Among them, Figures 3 to 6 In the diagram, arrow F1 indicates the first direction, arrow F2 indicates the second direction, and arrow F3 indicates the altitude direction. Detailed Implementation

[0079] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the invention. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present invention are not shown or described in the specification. This is to avoid obscuring the core parts of the invention with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0080] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0081] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages).

[0082] Existing car wash platform equipment typically only has start-stop control for the drainage mechanism under normal conditions, making it difficult to achieve closed-loop control throughout the entire car wash process. In special circumstances, if the drainage mechanism fails to drain water in time when the liquid level in the collection tank is too high, wastewater in the collection tank can easily overflow onto the car wash platform surface, affecting normal car wash operations, resulting in a poor user experience, and potentially causing certain safety hazards.

[0083] The automatic liquid level detection method and car wash system of this application can automatically detect the liquid level height of the platform and control the sewage pumping device and / or the upstream water inlet device according to the different liquid level heights. This allows the system to stop sewage discharge when the liquid level is too low and start sewage discharge when the liquid level is high. It can also control the water inlet device to stop water supply when the liquid level is close to full, thereby realizing the linkage operation of sewage discharge and water supply and completing the closed-loop control of the entire car wash process.

[0084] The following describes some embodiments of the automatic liquid level detection method for the platform and the car wash system provided in this application, with reference to the accompanying drawings.

[0085] In one embodiment of the first aspect of this application, an automatic liquid level detection method for a platform in a car wash system in a basement or building garage is provided, such as... Figure 1 and Figure 2 As shown, the car wash system 100 includes a platform 1, a sludge extraction device 21, a water inlet device 22, a liquid level detection device 3, and a control device 4. The control device 4 is communicatively connected to the sludge extraction device 21, the water inlet device 22, and the liquid level detection device 3 to perform corresponding control operations based on the liquid level height in the platform 1.

[0086] Accordingly, such as Figure 1 The example in the text includes an automatic liquid level detection method for a platform:

[0087] Step S110: The control device controls the liquid level detection device to detect the liquid level height signal of the platform;

[0088] Step S120: The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0089] Step S130: The control device determines the relative positional relationship between the liquid level height and the preset liquid level height;

[0090] If the control device determines that the liquid level is less than the first preset liquid level, then step S140 is executed: the control device issues a stop working command for the sludge pumping device to stop working.

[0091] If the control device determines that the liquid level is greater than the second preset liquid level and less than the third preset liquid level, then step S150 is executed: the control device issues a command to start the sludge pumping device and controls the sludge pumping device to start working.

[0092] If the control device determines that the liquid level is greater than the third preset liquid level, then step S160 is executed: the control device issues a start command for the sludge suction device and a stop command for the water inlet device, controlling the sludge suction device to start working and controlling the water inlet device to stop working. The first, second, and third preset liquid levels increase sequentially.

[0093] In this embodiment, steps S110 to S120 are used to detect the liquid level of the wastewater collected in the platform 1 to determine the actual liquid level height, which serves as the basis for subsequent control operations. Step S130 is used to determine the relative positional relationship between the detected liquid level height and the preset liquid level height, so as to perform different control operations according to different liquid level heights. The first preset liquid level height, the second preset liquid level height, and the third preset liquid level height are set according to the depth of the collection tank 11 used for collecting wastewater, each corresponding to a different liquid level height. When the detected liquid level height is lower than the first preset liquid level height, it indicates that the liquid level is too low. Step S140 controls the sludge pumping device 21 to stop working to avoid damage caused by the sludge pumping device 21 running dry due to the low liquid level, and also to reduce energy consumption. When the detected liquid level is greater than the second preset height but less than the third preset liquid level, it indicates that the liquid level is relatively high. In step S150, the sludge suction device 21 is activated to discharge the wastewater collected in the collection tank 11 of the platform 1, ensuring sufficient space in the collection tank 11 to continue accommodating the wastewater generated during car washing. When the detected liquid level is greater than the third preset liquid level, it indicates that the wastewater level in the collection tank 11 is too high and close to full. In step S160, the sludge suction device 21 is activated to begin suction, while the upstream water inlet device 22 is stopped supplying water to prevent further wastewater accumulation and overflow of the collection tank 11. It should be noted that when the detected liquid level is between the first preset liquid level and the second preset liquid level, since the liquid level is relatively low and within the normal capacity of the collection tank 11, both the sludge suction device 21 and the water inlet device 22 can remain in their original states. For example, during a car wash, when the liquid level is between the first preset liquid level and the second preset liquid level, the water inlet device 22 remains open. If the sludge suction device 21 is already open (e.g., the liquid level gradually decreases from above the second preset liquid level to below the second preset liquid level), then the sludge suction device 21 remains open. If the sludge suction device 21 is already closed (e.g., the liquid level gradually increases from below the first preset liquid level to above the first preset liquid level), then the sludge suction device 21 remains closed.

[0094] In a specific example, such as Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in the car wash system 100, the platform 1 includes an outer frame 111, an outer grille 121, a transverse ditch grille 122, and a side ditch cover 123. The outer frame 111 includes two first side walls 1111 arranged opposite each other in a first direction and two second side walls 1112 arranged opposite each other in a second direction. The transverse ditch grille 122 and the outer grille 121 are disposed within the outer frame 111 and spaced apart in the first direction. In the first direction, the outer grille 121 is located outside the transverse ditch grille 122 and connected to the first side walls 1111, so that the space between the outer grille 121 and the transverse ditch grille 122 forms a side ditch 113. The top of the side ditch 113 is covered with a side ditch cover 123, which is connected and fixed to the outer grille 121 and the transverse ditch grille 122. The side ditch 113 forms a collection tank 11 for collecting wastewater generated during car washing. The top surface of the transverse trough 122 forms a load-bearing plane 1221 for supporting the vehicle, and the top of the transverse trough 122 is provided with multiple grooves 1222 extending along a first direction. The side ditch 113 is connected to the grooves 1222 so that sewage can flow into the side ditch 113 under the guidance of the grooves 1222. When the space below the outer trough 121 is connected to the side ditch 113, the collection tank 11 includes the space below the side ditch 113 and the outer trough 121. The liquid level detection device 3 can be installed on the side ditch cover 123 or the outer trough 121. The detection part of the liquid level detection device 3 extends into the side ditch 113 or the space below the outer trough 121 to detect the liquid level height in the collection tank 11 (i.e., the liquid level height of the platform 1). A fixed bracket 1113 is provided on the outer wall of the outer frame 111. The fixed bracket 1113 has bolt holes. During installation, it can be bolted to the mounting base surface by fixing bolts 1114 to form a connection and fixation between the platform 1 and the mounting base surface, so as to ensure the stability of the platform 1.

[0095] The automatic liquid level detection method for the platform in this embodiment can automatically detect the liquid level and control the discharge status of the sewage pumping device and the water supply status of the water inlet device according to different liquid levels. It can control both the sewage discharge and the upstream water supply to form a linkage control between water supply and sewage discharge, realizing a closed-loop automatic control operation of the car wash process. This can effectively prevent sewage from overflowing from the collection tank due to untimely sewage discharge, thereby avoiding affecting normal car wash operations, improving the user experience, and reducing the safety hazards caused by sewage overflow.

[0096] In one embodiment, such as Figure 1 and Figure 7 As shown, in the automatic liquid level detection method for the platform, step S110 specifically includes:

[0097] Step S111: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value;

[0098] Step S120 specifically includes:

[0099] Step S121: The control device receives the first electrical parameter from the liquid level detection device;

[0100] Step S122: The control device determines the liquid level height based on the change of the first electrical parameter relative to the preset electrical parameter threshold.

[0101] In this embodiment, through step S111, the first electrical parameter corresponding to the liquid surface in the collection tank detected by the liquid level detection device 3 is used as the data matrix for the liquid level height, that is, the liquid level height is determined by the change of the electrical parameter detection value relative to the calibration reference value; then through steps S121 to S122, the liquid level height is determined based on the change of the first electrical parameter and the set electrical parameter threshold. On the one hand, this can improve the accuracy of the detection data, and on the other hand, it can be applied to a variety of different liquid level detection devices 3, making it more versatile. For example, a capacitive liquid level detector or other types of liquid level detectors with the same or similar working principle can be used. When using it, the liquid level detection device can be selected according to the actual situation.

[0102] In one embodiment, such as Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the liquid level detection device 3 specifically employs a capacitive detector. The liquid level detection device 3 has multiple detection electrodes, each corresponding to a different preset liquid level height and a calibration reference value. During detection, a capacitance is generated between each detection electrode and the liquid surface. The first electrical parameter is the difference between the capacitance value generated between the liquid surface and the detection electrode and the calibration reference value. Accordingly, as... Figure 7 and Figure 12 As shown, in the automatic liquid level detection method for the platform, step S122 specifically includes:

[0103] Step S123: If the control device determines that the first electrical parameter is greater than the electrical parameter threshold, then calculate the duration of the first electrical parameter;

[0104] Step S124: If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0105] In this embodiment, the liquid level detection device 3 employs a capacitive detector. It utilizes the capacitance difference between the liquid level and the detection electrode and the calibration reference value as the first electrical parameter. This allows the detection electrode to perform liquid level detection without contacting the sewage, achieving contactless liquid level detection. This effectively avoids clogging, jamming, and other malfunctions caused by impurities in the sewage, resulting in higher device reliability, longer service life, and reduced maintenance frequency and costs. Furthermore, it avoids the influence of factors such as water flow impact, improving the accuracy of the detection results. In determining the liquid level height, steps S123 to S124 further introduce a de-jittering time. When the duration for which the first electrical parameter is greater than the electrical parameter threshold is greater than the preset de-jittering time, it indicates that the first electrical parameter can maintain this value stably and continuously, rather than being greater than the electrical parameter threshold momentarily or for a short period. This indicates that the liquid level has reached the desired height relatively stably, resulting in high accuracy of the detection data. Only then is the preset liquid level height corresponding to the detected first electrical parameter determined as the actual liquid level height of the platform. The detection steps described in this embodiment effectively eliminate the momentary shaking caused by water flow impact or water droplet splashing, further improving the accuracy of the detection results and enabling more precise detection and control operations.

[0106] In a specific example, such as Figure 6 , Figures 8 to 11As shown, the capacitive detector specifically includes a mounting housing 31, a PCB detection board 32, and a protective housing 33. The mounting housing 31 serves as the mounting base, and its bottom is connected to the side ditch cover 123 or the outer grid 121. The bottom end of the mounting housing 31 has an opening 311. The PCB detection board 32 is disposed inside the mounting housing 31 and is fixedly connected to the mounting housing 31. A portion of the PCB detection board 32 extends out of the opening 311 and into the liquid collection tank 11. The PCB detection board 32 is provided with multiple capacitive detection electrodes to detect the liquid level height corresponding to the liquid surface. The protective shell 33 is a waterproof and sealed structure. It wraps around the outer surface of the PCB detection board 32 to provide a waterproof seal. When the outer surface of the protective shell 33 comes into contact with water, it isolates the water from the outside, preventing contact between the PCB detection board 32 inside and the water. This achieves a built-in detection structure, eliminating the need for the detection electrodes to be exposed or in direct contact with wastewater. This effectively prevents entanglement, blockage, and failure, and also avoids false triggering signals from the detection electrodes due to external water flow impacts, resulting in higher reliability and accuracy of the liquid level detection device 3. The mounting positions of the multiple detection electrodes on the PCB detection board 32 can be arranged according to actual detection needs. Specifically, the mounting housing 31 can adopt a cap-shaped structure as shown in the figure, that is, the circumferential edge of the bottom opening 311 has a flange structure 312 to facilitate contact and fixation with the side ditch cover 123 or the outer grid 121; the mounting housing 31 can be made of PETG (Polyethylene terephthalate glycol-modified) structure that is resistant to chemical corrosion immersion to resist the erosion of car wash cleaners and sewage; the mounting housing 31 can be connected and fixed to the side ditch cover 123 or the outer grid 121 by connecting bolts, and can be quickly disassembled and replaced even when the sewage is not drained.

[0107] In one specific example, the first preset liquid level height of the liquid level detection device 3 is located at 10% to 20% of the total depth of the liquid collection tank 11, the second preset liquid level height is located at 25% to 55% of the total depth of the liquid collection tank 11, and the third preset liquid level height is located at 75% to 90% of the total depth of the liquid collection tank 11, forming a stepped arrangement that increases sequentially. Corresponding to the first, second, and third preset liquid level heights, the control device 4 is provided with a low-level protection switch, a high-level start switch, and a full-level fault switch. Specifically, when the detected liquid level is lower than the first preset liquid level, it corresponds to the low-level protection setting. At this time, the liquid level is relatively low, and the control device 4 issues a stop command to the sludge suction device 21 to control the sludge suction device 21 to stop the sludge suction operation and prevent dry running and damage. When the detected liquid level is higher than the second preset liquid level but lower than the third preset liquid level, it corresponds to the high-level start setting. At this time, the liquid level is relatively high, and the control device 4 issues a start command to the sludge suction device 21 to control the sludge suction device 21 to start the sludge suction operation so that the sewage in the collection tank 11 is gradually discharged outward, ensuring that the collection tank 11 is filled with sewage. Sufficient space is maintained to accommodate the wastewater generated during subsequent car washing. When the detected liquid level is higher than the third preset liquid level, it corresponds to the full liquid level fault setting. At this time, the surface liquid level is too high and close to the full liquid level. If the liquid level continues to rise, it will cause wastewater to overflow. At this time, the control device 4 not only issues a start working command for the sludge pumping device 21 to control the sludge pumping device 21 to perform sludge pumping operation, but also issues a stop working command for the water inlet device 22 to control the upstream water inlet device 22 to stop water supply, so as to control the continued increase of wastewater and prevent the wastewater in the collection tank 11 from exceeding the full liquid level and overflowing.

[0108] For example, such as Figure 5 and Figure 6 As shown, taking a total depth of 8cm for the collection tank 11 as an example, the first preset liquid level height can be set at a height of 1.5cm from the bottom wall of the collection tank 11, the second preset liquid level height can be set at a height of 4cm from the bottom wall of the collection tank 11, and the third preset liquid level height can be set at a height of 7cm from the bottom wall of the collection tank 11. The PCB detection board 32 of the liquid level detection device 3 is equipped with a first detection electrode 321, a second detection electrode 322, and a third detection electrode 323. The first detection electrode 321 is used to detect the first preset liquid level height, the second detection electrode 322 is used to detect the second preset liquid level height, and the third detection electrode 323 is used to detect the third preset liquid level height. The control device 4 receives the induced electrical signals from each detection electrode and can determine the corresponding liquid level height based on the induced electrical signals to facilitate corresponding control operations. It should be noted that the arrangement of the detection electrodes on the PCB detection board 32 is not limited to... Figure 6 The examples provided can be customized based on actual testing and assembly requirements.

[0109] In a specific example, the drainage speed of the sludge suction device 21 varies at different liquid levels. Specifically, the drainage speed of the sludge suction device 21 at the high-level start position is the first drainage speed, while the drainage speed of the sludge suction device 21 at the full-level fault position is the second drainage speed, which is greater than the first drainage speed. Through this differentiated drainage measure, the drainage speed can be faster when the liquid level is close to full (above the third preset liquid level), effectively preventing sewage overflow due to untimely drainage. Simultaneously, when the liquid level is at the high-level start position, the sludge suction device 21 operates at a relatively normal first drainage speed, meeting normal drainage requirements while also reducing the energy consumption of the sludge suction device 21 to some extent.

[0110] In one embodiment, such as Figure 13 As shown, the car wash system 100 also includes a prompting device 5 for outputting a prompting signal. The prompting device 5 can establish a communication connection with the control device 4 via wired or wireless means. When the detected liquid level corresponds to the full liquid level fault setting, that is, when the liquid level height is greater than the third preset liquid level height, the control device 4, while controlling the sludge suction device 21 to start sludge suction and controlling the water inlet device 22 to stop water supply, can also control the prompting device 5 to output a first prompting signal to remind the user, so that the user can be informed of the reason for the water outage and the current liquid level status in a timely manner, which is conducive to improving the user experience. The first prompting signal may include at least one of the following: sound prompt, graphic prompt, and alarm light prompt, which is conducive to further enhancing the prompting effect.

[0111] In one embodiment, in addition to the first, second, and third preset liquid level heights, a fourth preset liquid level height is provided between the second and third preset liquid level heights. Specifically, the fourth preset liquid level height is located at 65% to 75% of the total depth of the collection tank 11. This height is still considered a high-level start-up position, but it is close to the third preset liquid level height. When the detected liquid level height is greater than the fourth preset liquid level height but less than the third preset liquid level height, the control device 4, in addition to controlling the sludge pumping device 21 to continue sludge pumping, can also control the prompting device 5 to output a second prompt signal to remind the user that the current liquid level is approaching full and the water inlet device 22 is about to stop supplying water. This allows the user to take timely countermeasures to reduce the adverse effects of the water supply stoppage and further improve the user experience. The second prompt signal may include at least one of sound prompts, graphic prompts, and alarm light prompts to further enhance the prompting effect. For example, Figure 6 and Figure 11In the example, the PCB detection board of the liquid level detection device is provided with a fourth detection electrode 324 for detecting a fourth preset liquid level height and outputting a corresponding induced electrical signal.

[0112] In one embodiment, such as Figure 3 and Figure 4 In the example, the platform 1 of the car wash system 100 is equipped with multiple liquid level detection devices 3, and the multiple liquid level detection devices 3 are spaced apart along a preset direction along the collection tank 11. For example Figure 3 In the example shown, in platform 1, the transverse grate 122 and the outer grate 121 are spaced apart along a first direction, so that the side ditch 113 between them forms a collection tank 11 extending along a second direction. Multiple liquid level detection devices 3 are spaced apart along the second direction to detect the liquid level at different positions in the collection tank 11, preventing deviations in liquid level at different positions from reducing the accuracy of the detection results. During liquid level detection, there may be a time difference between the liquid level signals output by multiple liquid level detection devices 3, for example, deviations in liquid level at different positions in the collection tank 11. This means that for the same preset liquid level, the liquid level detection devices 3 at different positions may not trigger their corresponding liquid level signals simultaneously. In this case, the control device 4 uses the liquid level signal from the first liquid level detection device 3 to complete the detection as a basis to determine the corresponding liquid level and perform subsequent control operations. It is understood that among the multiple liquid level detection devices 3, the liquid level detection device 3 that first completes the liquid level detection and outputs the liquid level height signal should be located at the highest point of the liquid level in the collection tank 11. Through the arrangement in this embodiment, it is possible to effectively prevent deviations in the liquid level height in the collection tank 11 from affecting the accuracy of the liquid level detection results, and further prevent the liquid level from exceeding the full liquid level height and overflowing.

[0113] It should be noted that the use of a capacitive detector as the liquid level detection device 3 in the above embodiments is only one of the preferred examples of this application. In practical applications, the type of liquid level detection device 3 is not limited to a capacitive detector, and other types of detectors may be used as needed.

[0114] In one embodiment, the liquid level detection device 3 can be at least one of a float-type liquid level gauge, an electrode-type liquid level sensor, a capacitive liquid level sensor, an ultrasonic liquid level sensor, a hydrostatic liquid level sensor, a photoelectric liquid level sensor, and a radar-type liquid level sensor. This further enhances the versatility of the liquid level detection device 3 and the automatic liquid level detection method for the platform, enabling different types of liquid level detection devices 3 to implement the automatic liquid level detection method for the platform described in this application. Specifically, the device can be selected based on actual usage needs and assembly requirements, and can achieve liquid level detection at different heights.

[0115] One embodiment of the second aspect of this application provides an automatic liquid level detection method for a platform, applicable to a car wash system in a basement or building garage, such as... Figure 2 , Figure 3 and Figure 14 As shown, the car wash system 100 includes a platform 1, a sludge extraction device 21, a water inlet device 22, a liquid level detection device 3, and a control device 4. The control device 4 is communicatively connected to the sludge extraction device 21, the water inlet device 22, and the liquid level detection device 3 to perform corresponding control operations based on the liquid level height in the platform 1.

[0116] Accordingly, such as Figure 14 The example in the text includes an automatic liquid level detection method for a platform:

[0117] Step S210: The control device controls the liquid level detection device to detect the liquid level height signal of the platform;

[0118] Step S220: The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0119] Step S230: The control device determines the gear range of the liquid level height based on the liquid level height; wherein, the gear range includes at least a low gear range to prevent the sludge pump from running dry, a full liquid gear range to prevent sewage overflow, and an adjustable gear range, and the adjustable gear range is located between the low gear range and the full liquid gear range.

[0120] Step S240: The control device generates a corresponding action command based on the determined range of the liquid level and sends it to the sludge suction device and / or the water inlet device to control the sludge suction device and / or the water inlet device to complete the action corresponding to the action command.

[0121] In this embodiment, steps S210 to S220 involve detecting the liquid level of the collected sewage in the platform to determine the actual liquid level height, which serves as the basis for subsequent control operations. Different control ranges are set for different liquid level heights, including a low-level range, an adjustable-level range, and a full-level range. The adjustable-level range lies between the low-level and full-level ranges. Steps S230 to S240 determine the control range of the detected liquid level height. The control device 4 generates an action command corresponding to the control range to perform corresponding actions on the sludge pumping device 21 and / or the water inlet device 22, thereby achieving differentiated control operations for the sludge pumping device 21 and the water inlet device 22 based on different liquid level heights. The low-level range corresponds to a lower liquid level, indicating that the liquid level has already caused or is about to cause the sludge pumping device 21 to idle; the full-level range corresponds to a higher liquid level, indicating that the liquid level is close to or at full level, and further increases in the liquid level may lead to sewage overflow. The adjustable range indicates that the liquid level is at an intermediate level. The available capacity of the collection tank 11 can be adjusted by reducing the amount of wastewater stored in the collection tank 11 through a sludge pumping operation. Corresponding to the above-mentioned range, the control device 4 can perform corresponding control operations on the sludge pumping device 21 and the water inlet device 22, such as controlling the start and stop status of the sludge pumping device 21 and the water inlet device 22 to adapt to the current liquid level, so as to ensure that the wastewater in the collection tank 11 does not overflow and that the collection tank 11 maintains sufficient space to continue collecting wastewater generated by car washing.

[0122] In a specific example, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in the car wash system 100, the platform 1 can adopt the structural form as described in the previous embodiment. The assembly relationship between the platform 1 and the liquid level detection device 3 and the sewage suction device 21, as well as the communication connection relationship between the platform 1 and the control device 4, are the same as described above, and will not be repeated here.

[0123] The automatic liquid level detection method of the platform in this embodiment can automatically detect the liquid level height and control the discharge status of the sewage pumping device and the water supply status of the water inlet device 22 according to the corresponding gear range of the detected liquid level height. It can control both the sewage discharge and the upstream water supply to form a linkage control between water supply and sewage discharge, realize the closed-loop automatic control operation of the car washing process, effectively prevent sewage overflow in the collection tank 11 due to untimely sewage discharge, thereby avoiding affecting the normal car washing operation, improving the user experience, and reducing the safety hazards caused by sewage overflow.

[0124] In one embodiment, such as Figure 14 and Figure 15As shown, in the automatic liquid level detection method for the platform, step S240 specifically includes:

[0125] Step S241: The control device determines the range of the liquid level height;

[0126] If the control device determines that the liquid level is in the low range, then step S242 is executed: the control device issues a stop working command for the sludge suction device, and controls the sludge suction device to stop working.

[0127] If the control device determines that the liquid level is within the adjustable range, then step S243 is executed: the control device issues a command to start the sludge suction device and controls the sludge suction device to start working.

[0128] If the control device determines that the liquid level is in the full liquid range, then step S244 is executed: the control device issues a start working command for the sludge suction device and a stop working command for the water inlet device, controls the sludge suction device to start working, and controls the water inlet device to stop working.

[0129] In this embodiment, when the detected liquid level is in the low range, it indicates that the liquid level is too low. Step S242 controls the sludge suction device 21 to stop working to prevent damage caused by idling due to the low liquid level, and also to reduce energy consumption. When the detected liquid level is in the adjustable range, it indicates that the liquid level is at an intermediate level. Step S243 controls the sludge suction device 21 to work, discharging the wastewater collected in the collection tank 11 of the platform 1 to maintain sufficient space in the collection tank 11 during subsequent car wash operations to continue accommodating the wastewater generated during car washes. When the detected liquid level is in the full range, it indicates that the wastewater level in the collection tank 11 is too high and close to full. Step S244 controls the sludge suction device 21 to start suction, while simultaneously controlling the upstream water inlet device 22 to stop water supply to prevent further increase in wastewater and overflow of the collection tank 11.

[0130] By using different gear ranges corresponding to the liquid level in this embodiment, differentiated control operations can be achieved. This avoids damage to the sludge suction device 21 due to low liquid level and prevents sewage overflow due to high liquid level, thus forming a linkage control between water supply and sewage discharge. This enables automatic detection and closed-loop control throughout the car wash process, which helps to further improve the automation level of the car wash process, reduce safety hazards, and effectively improve the user experience.

[0131] In one embodiment, such as Figures 3 to 6In the example of the car wash system 100, a collection tank 11 for collecting wastewater is provided within the platform 1. A liquid level detection device 3 is installed on the side ditch cover 123 or the outer grille 121 corresponding to the collection tank 11 to detect the liquid level height within the collection tank 11. The low-level range corresponds to 0% to 20% of the total depth of the collection tank 11; the adjustable-level range corresponds to 25% to 75% of the total depth of the collection tank 11; and the full-level range corresponds to 75% to 100% of the total depth of the collection tank 11. By dividing the collection tank 11 into different levels proportional to its total depth, different levels from low to high are formed, facilitating different control operations based on the liquid level height corresponding to each level.

[0132] It should be noted that when the detected liquid level is between the low-level range and the adjustable-level range, since the liquid level is relatively low and within the normal capacity of the collection tank 11, both the sludge suction device 21 and the water inlet device 22 can remain in their original states. For example, during a car wash, when the liquid level is between the low-level range and the adjustable-level range, the water inlet device 22 remains open to supply water normally. If the sludge suction device 21 is already open (e.g., the liquid level drops from the adjustable-level range to between the low-level and adjustable-level ranges), then the sludge suction device 21 remains open. If the sludge suction device 21 is already closed (e.g., the liquid level rises from the low-level range to between the low-level and adjustable-level ranges), then the sludge suction device 21 remains closed.

[0133] In a specific example, such as Figure 13 As shown, the car wash system 100 also includes a prompting device 5 for outputting a prompting signal. The prompting device 5 can establish a communication connection with the control device 4 via wired or wireless means. When the detected liquid level corresponds to the full liquid level range, the control device 4, while controlling the sludge suction device 21 to start sludge suction and controlling the water inlet device 22 to stop water supply, can also control the prompting device 5 to output a first prompting signal to remind the user, so that the user can be informed of the reason for the water outage and the current liquid level status in a timely manner, which is beneficial to improving the user experience. The first prompting signal may include at least one of the following: sound prompt, graphic prompt, and alarm light prompt, which is beneficial to further enhance the prompting effect.

[0134] In a specific example, such as Figure 13As shown, the car wash system 100 also includes a prompting device 5 for outputting a prompt. The prompting device 5 can establish a communication connection with the control device 4 via wired or wireless means. When the liquid level is within the adjustable range, and further, if the liquid level is within 65% to 75% of the total depth of the collection tank 11, this liquid level is close to the lower limit of the full liquid range. At this time, in addition to controlling the sludge suction device 21 to continue the sludge suction operation, the control device 4 can also control the prompting device 5 to output a second prompt signal to remind the user, so that the user is aware in advance that the current liquid level is close to the full liquid level and the water inlet device 22 will soon stop supplying water, so that the user can take timely measures to reduce the adverse effects caused by the water supply stoppage, which is conducive to further improving the user experience. The second prompt signal may include at least one of the following: sound prompt, graphic prompt, and alarm light prompt, which is conducive to further enhancing the prompting effect.

[0135] In one embodiment, such as Figure 14 and Figure 16 As shown, in the automatic liquid level detection method for the platform, step S210 specifically includes:

[0136] Step S211: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value;

[0137] Step S220 specifically includes:

[0138] Step S221: The control device receives the first electrical parameter from the liquid level detection device;

[0139] Step S222: If the control device determines that the first electrical parameter is greater than the electrical parameter threshold, then calculate the duration of the first electrical parameter;

[0140] Step S223: If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0141] In this embodiment, through step S211, the first electrical parameter corresponding to the liquid surface in the collection tank 11 detected by the liquid level detection device 3 is used as the data matrix for the liquid level height, that is, the liquid level height is determined by the change of the electrical parameter detection value relative to the calibration reference value; then through steps S221 to S223, the liquid level height is determined based on the change of the first electrical parameter and the set electrical parameter threshold. On the one hand, this can improve the accuracy of the detection data, and on the other hand, it can be applied to a variety of different liquid level detection devices 3, making it more versatile. For example, a capacitive liquid level detector or other types of liquid level detectors with the same or similar working principle can be used. When using it, the liquid level detection device 3 can be selected according to the actual situation. In determining the liquid level height, a de-vibration time is introduced. When the duration for which the first electrical parameter is greater than the electrical parameter threshold is greater than the preset de-vibration time, it indicates that the first electrical parameter can maintain its value stably and continuously, rather than being greater than the electrical parameter threshold momentarily or for a short period. This indicates that the liquid level has reached the desired height relatively stably, and the accuracy of the detection data is high. Only then is the preset liquid level height corresponding to the detected first electrical parameter determined to be the actual liquid level height of platform 1. Through the above detection steps in this embodiment, the momentary vibration state caused by water flow impact or water droplet splashing can be effectively eliminated, further improving the accuracy of the detection results and enabling more precise detection and control operations.

[0142] In a specific example, such as Figure 6 , Figures 8 to 11 As shown, the liquid level detection device 3 can also employ the capacitive detector shown in the previous embodiments. The capacitive detector specifically includes a mounting housing 31, a PCB detection board 32, and a protective housing 33. The specific structural composition, installation method, and detection principle of the capacitive detector are the same as in the previous embodiments and will not be repeated here. It should be noted that using a capacitive detector as the liquid level detection device 3 is only one preferred example of this application. In practical applications, the type of liquid level detection device 3 is not limited to a capacitive detector; other types of detectors can also be used according to application requirements.

[0143] In one embodiment, the liquid level detection device 3 can be at least one of a float-type liquid level gauge, an electrode-type liquid level sensor, a capacitive liquid level sensor, an ultrasonic liquid level sensor, a hydrostatic liquid level sensor, a photoelectric liquid level sensor, and a radar-type liquid level sensor. This further enhances the versatility of the liquid level detection device 3 and the automatic liquid level detection method for the platform, enabling different types of liquid level detection devices 3 to implement the automatic liquid level detection method for the platform described in this application. Specifically, the device can be selected based on actual usage needs and assembly requirements, and can achieve liquid level detection at different heights.

[0144] One embodiment of the third aspect of this application provides an automatic liquid level detection method for a platform, applicable to a car wash system in a basement or building garage. For example... Figure 2 and Figure 17 As shown, the car wash system 100 includes a platform 1, a sludge extraction device 21, a water inlet device 22, a liquid level detection device 3, and a control device 4. The control device 4 is communicatively connected to the sludge extraction device 21, the water inlet device 22, and the liquid level detection device 3 to perform corresponding control operations based on the liquid level in the platform 1. Accordingly, as... Figure 17 The example in the text includes an automatic liquid level detection method for a platform:

[0145] Step S310: The control device controls the liquid level detection device to detect the liquid level height signal of the platform;

[0146] Step S320: The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal;

[0147] Step S330: The control device determines the range of the liquid level height;

[0148] If the control device determines that the liquid level is lower than the low liquid level threshold, then step S340 is executed: the control device issues a stop working command for the sludge pumping device to stop working.

[0149] If the control device determines that the liquid level is higher than the high liquid level threshold, then step S350 is executed: the control device issues a start working command for the sludge pumping device and a stop working command for the water inlet device, controls the sludge pumping device to start working, and controls the water inlet device to stop working.

[0150] In a specific example, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in the car wash system 100, the platform 1 can adopt the structural form as described in the previous embodiment. The assembly relationship between the platform 1 and the liquid level detection device 3 and the sewage suction device 21, as well as the communication connection relationship between the platform 1 and the control device 4, are the same as described above, and will not be repeated here.

[0151] The automatic liquid level detection method for the platform in this embodiment enables automatic detection of the liquid level height. Based on the relative positional relationship between the detected liquid level height and the liquid level threshold, it enables monitoring of low and high liquid level states, as well as corresponding control operations on the drainage status of the sludge pumping device and the water supply status of the water inlet device. This forms a linkage control between water supply and sludge discharge, which can prevent the sludge pumping device from running dry and being damaged when the liquid level is too low, and can also prevent the overflow of sewage in the collection tank due to untimely sludge discharge when the liquid level is too high. This achieves closed-loop control, which helps to avoid adverse effects of liquid level changes on normal car washing operations, reduces safety hazards caused by sewage overflow, and improves the user experience.

[0152] Furthermore, in one embodiment, such as Figures 3 to 6 As shown, in the car wash system 100, a collection tank 11 for collecting wastewater is provided in the platform 1. A liquid level detection device 3 is installed on the side ditch cover 123 or the outer grid 121 corresponding to the collection tank 11 to detect the liquid level height in the collection tank 11. The low liquid level threshold is located at 10% to 20% of the total depth of the collection tank 11; the high liquid level threshold is located at 75% to 90% of the total depth of the collection tank 11. By dividing the liquid level thresholds according to the proportion of the total depth of the collection tank 11, high and low liquid level thresholds are formed, serving as the upper and lower limits of the normal operating liquid level height, facilitating corresponding control operations based on the liquid level position. It should be noted that when the detected liquid level height is between the low and high liquid level thresholds, the sludge suction device 21 and / or the water inlet device 22 can be controlled accordingly to ensure sufficient capacity in the collection tank 11 for continued wastewater collection during subsequent car wash operations.

[0153] Furthermore, in one embodiment, an intermediate liquid level threshold is provided between the low liquid level threshold and the high liquid level threshold, and the intermediate liquid level threshold is located at a position of 25% to 55% of the total depth of the collection tank 11. Correspondingly, as... Figure 18 As shown, the automatic liquid level detection method for the platform also includes step S360: the control device 4 issues a command to start the pumping device, controlling the pumping device to start working. When the control device 4 determines the range of the liquid level height, if the control device 4 determines that the liquid level height is between the intermediate liquid level threshold and the high liquid level threshold, then step S360 is executed. In this embodiment, by increasing the intermediate liquid level threshold, the relative positional relationship between the liquid level height and the intermediate liquid level threshold is used as the basis for whether to control the pumping device 21 to start working. When the detected liquid level height is between the intermediate liquid level threshold and the high liquid level threshold, it indicates that the liquid level height is at an intermediate level. Although it is still within the capacity of the collection tank 11, if the liquid level height continues to rise, it will approach the high liquid level threshold. At this time, the pumping device 21 is started to discharge the sewage in the collection tank 11 to the outside, so that there is enough space in the collection tank 11 to accommodate the sewage generated during the subsequent car washing process, so that the liquid level height in the collection tank 11 is kept relatively stably at an intermediate level, so as to avoid the sewage overflow caused by excessively high liquid level and untimely sewage discharge.

[0154] Furthermore, in one embodiment, such as Figure 17 and Figure 19 As shown, in the automatic liquid level detection method for the platform, step S310 specifically includes:

[0155] Step S311: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value;

[0156] Step S320 specifically includes:

[0157] Step S321: The control device receives the first electrical parameter from the liquid level detection device;

[0158] Step S322: If the control device determines that the first electrical parameter is greater than the electrical parameter threshold, then calculate the duration of the first electrical parameter;

[0159] Step S223: If the control device determines that the duration is longer than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

[0160] In this embodiment, through step S311, the first electrical parameter corresponding to the liquid surface in the collection tank 11 detected by the liquid level detection device 3 is used as the data matrix for the liquid level height, that is, the liquid level height is determined by the change of the electrical parameter detection value relative to the calibration reference value; then through steps S321 to S223, the liquid level height is determined based on the change of the first electrical parameter and the set electrical parameter threshold. On the one hand, this can improve the accuracy of the detection data, and on the other hand, it can be applied to a variety of different liquid level detection devices 3, making it more versatile. For example, a capacitive liquid level detector or other types of liquid level detectors with the same or similar working principle can be used. When using it, the liquid level detection device 3 can be selected according to the actual situation. In determining the liquid level height, a de-vibration time is introduced. When the duration for which the first electrical parameter is greater than the electrical parameter threshold is greater than the preset de-vibration time, it indicates that the first electrical parameter can maintain its value stably and continuously, rather than being greater than the electrical parameter threshold momentarily or for a short period. This indicates that the liquid level has reached the desired height relatively stably, and the accuracy of the detection data is high. Only then is the preset liquid level height corresponding to the detected first electrical parameter determined to be the actual liquid level height of platform 1. Through the above detection steps in this embodiment, the momentary vibration state caused by water flow impact or water droplet splashing can be effectively eliminated, further improving the accuracy of the detection results and enabling more precise detection and control operations.

[0161] In a specific example, such as Figure 6 , Figures 8 to 11As shown, the liquid level detection device 3 can also employ the capacitive detector shown in the previous embodiments. The capacitive detector specifically includes a mounting housing 31, a PCB detection board 32, and a protective housing 33. The specific structural composition, installation method, and detection principle of the capacitive detector are the same as in the previous embodiments and will not be repeated here. It should be noted that using a capacitive detector as the liquid level detection device 3 is only one preferred example of this application. In practical applications, the type of liquid level detection device 3 is not limited to a capacitive detector; other types of detectors can also be used according to application requirements.

[0162] In one embodiment, the liquid level detection device 3 can be at least one of a float-type liquid level gauge, an electrode-type liquid level sensor, a capacitive liquid level sensor, an ultrasonic liquid level sensor, a hydrostatic liquid level sensor, a photoelectric liquid level sensor, and a radar-type liquid level sensor. This further enhances the versatility of the liquid level detection device 3 and the automatic liquid level detection method for the platform, enabling different types of liquid level detection devices 3 to implement the automatic liquid level detection method for the platform described in this application. Specifically, the device can be selected based on actual usage needs and assembly requirements, and can achieve liquid level detection at different heights.

[0163] An embodiment of the fourth aspect of this application provides a car wash system 100 for use in basements or building garages, such as... Figures 2 to 6 As shown, the car wash system 100 includes a platform 1, a sewage extraction device 21, a liquid level detection device 3, a water inlet device 22, and a control device 4. The platform 1 serves as the supporting structure of the car wash system 100, capable of supporting vehicles. A collection tank 11 is provided in the platform 1 to collect wastewater generated during car washing. The sewage extraction device 21 is installed in the collection tank 11 to discharge the wastewater from the collection tank 11. The water inlet device 22 supplies the water required for car washing. The liquid level detection device 3 is installed on the platform 1, and its detection end extends into the collection tank 11 to detect the liquid level height in the collection tank 11 and generate a corresponding liquid level height signal. The control device 4 is connected to the sludge pumping device 21, the liquid level detection device 3, and the water inlet device 22 via wired or wireless means. The control device 4 can receive the liquid level height signal detected by the liquid level detection device 3, and determine the liquid level height in the collection tank 11 based on the liquid level height signal. Then, it performs corresponding control operations on the sludge pumping device 21 and / or the water inlet device 22 to execute the automatic liquid level detection method of the platform 1 in any of the above embodiments.

[0164] Furthermore, in a specific example, such as Figures 3 to 6 As shown, in the car wash system 100, the platform 1 can adopt the structural form as described in the previous embodiment. The assembly relationship between the platform 1 and the liquid level detection device 3 and the sewage suction device 21, as well as the communication connection relationship between the platform 1 and the control device 4, are the same as described above, and will not be repeated here.

[0165] Furthermore, in a specific example, such as Figure 13 As shown, the car wash system 100 also includes a prompting device 5 for outputting prompting signals. The prompting device 5 can establish a communication connection with the control device 4 via wired or wireless means. The control device 4 can control the prompting device 5 to output corresponding prompting information according to different liquid levels. For example, when the detected liquid level is close to overflow, the control device 4, while controlling the sludge suction device 21 to start sludge suction and controlling the water inlet device 22 to stop water supply, simultaneously controls the prompting device 5 to output a corresponding prompting signal to remind the user, allowing the user to promptly know the reason for the water outage and the current liquid level status, thus improving the user experience. One of the prompting signals can include at least one of sound prompts, graphic prompts, and alarm light prompts, which further enhances the prompting effect.

[0166] Furthermore, in a specific example, such as Figure 6 , Figures 8 to 11 As shown, the liquid level detection device 3 can also employ the capacitive detector shown in the previous embodiments. The capacitive detector specifically includes a mounting housing 31, a PCB detection board 32, and a protective housing 33. The specific structural composition, installation method, and detection principle of the capacitive detector are the same as in the previous embodiments and will not be repeated here. It should be noted that using a capacitive detector as the liquid level detection device 3 is only one preferred example of this application. In practical applications, the type of liquid level detection device 3 is not limited to a capacitive detector; other types of detectors can also be used according to application requirements.

[0167] Furthermore, the car wash system 100 in this embodiment also has all the beneficial effects of the automatic platform liquid level detection method in any of the above embodiments, which will not be repeated here.

[0168] This document describes various exemplary embodiments with reference to them. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope of this document. For example, various operational steps and components for performing operational steps can be implemented in different ways depending on the specific application or considering any number of cost functions associated with the operation of the system (e.g., one or more steps can be deleted, modified, or combined with other steps).

[0169] While the principles herein have been illustrated in various embodiments, numerous modifications to the structures, arrangements, proportions, elements, materials, and components, particularly suited to specific environments and operational requirements, may be used without departing from the principles and scope of this disclosure. These modifications and other alterations or alterations will be included within the scope of this document. Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the fundamental principles of the invention.

Claims

1. An automatic liquid level detection method for a car wash platform, applied to a car wash system in a basement or building garage, the car wash system comprising a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device, characterized in that, The automatic liquid level detection method for the platform includes: The control device controls the liquid level detection device to detect the liquid level height signal of the platform; The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal; If the control device determines that the liquid level is less than the first preset liquid level, the control device issues a stop working command for the sludge pumping device to stop working. If the control device determines that the liquid level is greater than the second preset liquid level and less than the third preset height, the control device issues a command to start the pumping device and controls the pumping device to start working. If the control device determines that the liquid level is greater than the third preset liquid level, the control device issues a start working command for the sludge pumping device and a stop working command for the water inlet device, thereby controlling the sludge pumping device to start working and controlling the water inlet device to stop working. The first preset liquid level height, the second preset liquid level height, and the third preset liquid level height increase sequentially.

2. The automatic liquid level detection method for a platform according to claim 1, characterized in that, The control device controls the liquid level detection device to detect the liquid level height signal of the platform, including: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value; The control device acquires the liquid level signal and determines the liquid level based on the acquired liquid level signal, including: The control device receives the first electrical parameter from the liquid level detection device; The control device determines the liquid level height based on the change of the first electrical parameter relative to a preset electrical parameter threshold.

3. The automatic liquid level detection method for a platform according to claim 2, characterized in that, The liquid level detection device is a capacitive detector and has multiple detection electrodes. Each detection electrode has a different preset liquid level height and a corresponding calibration reference value. The preset liquid level height includes a first preset liquid level height, a second preset liquid level height, and a third preset liquid level height. The first electrical parameter is the capacitance difference between the capacitance value generated between the liquid surface and the detection electrode and the calibration reference value. The control device determines the liquid level height based on the change of the first electrical parameter relative to a preset electrical parameter threshold, including: If the control device determines that the first electrical parameter is greater than the electrical parameter threshold, then it calculates the duration of the first electrical parameter. If the control device determines that the duration is greater than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

4. The automatic liquid level detection method for a platform according to claim 3, characterized in that, The first preset liquid level height is located at 10% to 20% of the total depth of the collection tank, and when the liquid level height is less than the first preset liquid level height, it corresponds to the low-level protection setting, and the control device issues a command to stop the sludge pumping device. When the second preset liquid level is located at 25% to 55% of the total depth of the collection tank, and the liquid level is greater than the second preset liquid level but less than the third preset liquid level, it corresponds to the high-level start position, and the control device issues a command to start the sludge pumping device. The third preset liquid level height is located at 75% to 90% of the total depth of the collection tank. When the liquid level height is greater than the third preset liquid level height, it corresponds to the full liquid level fault setting. The control device issues a command to start the sludge pumping device and a command to stop the water inlet device.

5. The automatic liquid level detection method for a platform according to claim 4, characterized in that, The drainage speed of the sludge pumping device at the high-level start position is the first drainage speed; The drainage speed of the sludge pumping device at the full liquid level fault position is the second drainage speed; The second drainage rate is greater than the first drainage rate.

6. The automatic liquid level detection method for a platform according to claim 4, characterized in that, The car wash system also includes a notification device; In the full liquid level fault position, the control device controls the prompting device to output a first prompting signal; wherein, the first prompting signal includes at least one of an audible prompt, a graphic prompt, and an alarm light prompt.

7. The automatic liquid level detection method for a platform according to claim 6, characterized in that, The preset liquid level height also includes a fourth preset liquid level height, which is located at 65% to 75% of the total depth of the liquid collection tank; When the liquid level is greater than the fourth preset liquid level and less than the third preset liquid level, the control device controls the prompting device to output a second prompting signal; wherein, the second prompting signal includes at least one of sound prompts, graphic prompts, and alarm light prompts.

8. The automatic liquid level detection method for a platform according to claim 3, characterized in that, The liquid level detection device includes: The mounting housing has a bottom that is detachably connected to the platform, and the bottom end of the mounting housing has an opening that faces the liquid collection tank. A PCB testing board, wherein the detection electrode is a capacitive detection element and is connected inside the mounting housing, the detection end of the PCB testing board passes through the opening and extends into the liquid collection tank, and multiple detection electrodes are disposed at the detection end of the PCB testing board; And a protective shell, which is a waterproof and sealed structure and is wrapped around the outer surface of the PCB test board.

9. The automatic liquid level detection method for a platform according to claim 8, characterized in that, The liquid level detection device is a plurality of such devices, and the plurality of such devices are arranged at intervals along a preset direction of the liquid collection tank. In the liquid level detection process, when there is a time difference between the liquid level height signals output by multiple liquid level detection devices, the liquid level height in the collection tank is determined based on the liquid level height signal of the liquid level detection device that completes the detection first.

10. The automatic liquid level detection method for a platform according to claim 1, characterized in that, The liquid level detection device includes at least one of the following: float-type liquid level gauge, electrode-type liquid level sensor, capacitive liquid level sensor, ultrasonic liquid level sensor, hydrostatic liquid level sensor, photoelectric liquid level sensor, and radar-type liquid level sensor.

11. An automatic liquid level detection method for a car wash platform, applied to a car wash system in a basement or building garage, the car wash system comprising a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device, characterized in that, The automatic liquid level detection method for the platform includes: The control device controls the liquid level detection device to detect the liquid level height signal of the platform; The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal; The control device determines the gear range where the liquid level is located based on the liquid level height; wherein, the gear range includes at least a low gear range to prevent the sludge pump from running dry, a full liquid gear range to prevent sewage overflow, and an adjustable gear range, wherein the adjustable gear range is located between the low gear range and the full liquid gear range. The control device generates a corresponding action command based on the determined range of the liquid level and sends it to the sludge pumping device and / or the water inlet device to control the sludge pumping device and / or the water inlet device to complete the action corresponding to the action command.

12. The automatic liquid level detection method for a platform according to claim 11, characterized in that, The control device generates a corresponding action command based on the determined range of the liquid level and sends it to the sludge suction device and / or the water inlet device to control the sludge suction device and / or the water inlet device to complete the action corresponding to the action command, including: If the control device determines that the liquid level is in the low range, the control device issues a stop command for the sludge pumping device to stop working. If the control device determines that the liquid level is within the adjustable range, the control device issues a command to start the sludge pumping device and controls the sludge pumping device to start working. If the control device determines that the liquid level is within the full liquid range, the control device issues a start command for the sludge pumping device and a stop command for the water inlet device, controlling the sludge pumping device to start working and the water inlet device to stop working.

13. The automatic liquid level detection method for a platform according to claim 12, characterized in that, The platform has a liquid collection tank, and the liquid level detection device is used to detect the liquid level height in the liquid collection tank; The low gear range corresponds to 0% to 20% of the total depth of the liquid collection tank; The adjustable range corresponds to 25% to 75% of the total depth of the collection tank; The full liquid level range corresponds to 75% to 100% of the total depth of the collection tank.

14. The automatic liquid level detection method for a platform according to claim 13, characterized in that, The car wash system also includes a notification device; Wherein, if the liquid level is within the full liquid level range, the control device controls the prompting device to output a first prompt signal; the first prompt signal includes at least one of an audible prompt, a graphic prompt, and an alarm light prompt; and / or, If the liquid level is within the adjustable range and the liquid level is between 65% and 75% of the total depth of the collection tank, the control device controls the prompting device to output a second prompting signal; wherein the second prompting signal includes at least one of an audible prompt, a graphic prompt, and an alarm light prompt.

15. The automatic liquid level detection method for a platform according to claim 11, characterized in that, The control device controls the liquid level detection device to detect the liquid level height signal of the platform, including: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value; The control device acquires the liquid level signal and determines the liquid level based on the acquired liquid level signal, including: The control device receives the first electrical parameter from the liquid level detection device; If the control device determines that the first electrical parameter is greater than a preset electrical parameter threshold, it calculates the duration of the first electrical parameter. If the control device determines that the duration is greater than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

16. An automatic liquid level detection method for a car wash platform, applied to a car wash system in a basement or building garage, the car wash system comprising a platform, a sludge extraction device, a water inlet device, a liquid level detection device, and a control device, characterized in that, The automatic liquid level detection method for the platform includes: The control device controls the liquid level detection device to detect the liquid level height signal of the platform; The control device acquires the liquid level height signal and determines the liquid level height based on the acquired liquid level height signal; If the control device determines that the liquid level is lower than the low liquid level threshold, the control device issues a stop working command for the sludge pumping device to stop working. If the control device determines that the liquid level is higher than the high liquid level threshold, the control device issues a stop working command for the water inlet device, thereby controlling the water inlet device to stop working.

17. The automatic liquid level detection method for a platform according to claim 16, characterized in that, The platform has a liquid collection tank, and the liquid level detection device is used to detect the liquid level height in the liquid collection tank; The low liquid level threshold is located at 10% to 20% of the total depth of the collection tank; The high liquid level threshold is located at 75% to 90% of the total depth of the collection tank.

18. The automatic liquid level detection method for a platform according to claim 17, characterized in that, An intermediate liquid level threshold is provided between the low liquid level threshold and the high liquid level threshold, and the intermediate liquid level threshold is located at 25% to 55% of the total depth of the liquid collection tank; If the control device determines that the liquid level is between the intermediate liquid level threshold and the high liquid level threshold, the control device issues a command to start the pumping device, thereby controlling the pumping device to start working.

19. The automatic liquid level detection method for a platform according to claim 16, characterized in that, The control device controls the liquid level detection device to detect the liquid level height signal of the platform, including: The control device controls the liquid level detection device to detect the first electrical parameter corresponding to the liquid level in the liquid collection tank of the platform; wherein, the first electrical parameter is the difference between the detected value of the electrical parameter corresponding to the liquid level and the calibration reference value; The control device acquires the liquid level signal and determines the liquid level based on the acquired liquid level signal, including: The control device receives the first electrical parameter from the liquid level detection device; If the control device determines that the first electrical parameter is greater than a preset electrical parameter threshold, it calculates the duration of the first electrical parameter. If the control device determines that the duration is greater than the preset de-vibration duration, it determines the preset liquid level height corresponding to the first electrical parameter as the liquid level height of the platform.

20. A car wash system for use in underground parking garages or apartment buildings, characterized in that, The car wash system includes: A platform for supporting vehicles, and the platform having a collection tank for collecting wastewater from car washing; A sludge suction device is installed in the collection tank to discharge the sewage in the collection tank to the outside; A liquid level detection device is installed on the platform. The detection end of the liquid level detection device extends into the liquid collection tank to detect the liquid level height in the liquid collection tank and generate a corresponding liquid level height signal. A water inlet device is used to supply water for car washing. The system includes a control device, which is communicatively connected to the sludge pumping device, the liquid level detection device, and the water inlet device, to determine the liquid level in the collection tank based on the liquid level height signal from the liquid level detection device, and to control the working state of the sludge pumping device and / or the water inlet device accordingly, so as to execute the automatic liquid level detection method for the platform as described in any one of claims 1 to 10, or the automatic liquid level detection method for the platform as described in any one of claims 11 to 15, or the automatic liquid level detection method for the platform as described in any one of claims 16 to 19.

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