Liquid level alarm device

Abstract

The embodiment of the utility model provides a liquid level alarm device which comprises a buoy, the floating base body is arranged in a closed container containing liquid and floats on the liquid surface of the liquid, the guide rod is arranged on the floating base body, the top end of the guide rod penetrates through a through hole preset in the top wall of the closed container and extends out of the closed container, and the marker is assembled on the guide rod and located outside the closed container. The camera is fixedly arranged outside the closed container and is used for directionally shooting a real-time image of the marker; and the image analysis processor is connected with the camera and is used for analyzing the real-time image in real time so as to determine the actual height position of the marker appearing in the real-time image and sending an alarm instruction when the actual height position meets a preset alarm condition. According to the embodiment, liquid level detection and alarm of liquid in the closed container are achieved, and the structure is simple.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of liquid level detection, and in particular to a liquid level alarm device. Background Art

[0002] To effectively monitor and control the liquid level of a liquid contained in a container, a liquid level control device is typically installed within the container. One existing liquid level control device utilizes a surveillance camera to capture real-time images of the liquid surface or a float floating on the liquid surface to analyze and confirm the liquid level. When the liquid level reaches a warning level, the device issues a corresponding control instruction and / or an alarm. However, such liquid level control devices are subject to numerous limitations. To capture the liquid surface or the float, the surveillance camera must either be installed inside the container or the container must be made of a transparent material or have an opening. However, installing the surveillance camera inside the container can easily damage the camera due to moisture. Transparent or open containers are unsuitable for liquids that require protection from light. Furthermore, an open container design is also unsuitable for liquids that are volatile or susceptible to deterioration due to reactions with the outside world. Utility Model Content

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a liquid level alarm device that can effectively monitor the liquid level inside a container made of an opaque material.

[0004] In order to solve the above technical problems, the embodiment of the present invention provides the following technical solutions: a liquid level alarm device, comprising:

[0005] The buoy comprises a floating base placed in a closed container containing liquid and floating on the surface of the liquid, a guide rod provided on the floating base and having its top end extending through a predetermined perforation in a top wall of the closed container and extending outside the closed container, and a marker assembled on the guide rod and located outside the closed container;

[0006] A camera, fixedly mounted on the outside of the closed container, for directionally capturing a real-time image of the marker;

[0007] an image analysis processor connected to the camera, configured to analyze the real-time image in real time to determine the actual height position of the marker appearing in the real-time image and issue an alarm instruction when the actual height position meets a preset alarm condition; and

[0008] An alarm is connected to the image analysis processor and is used to respond to the alarm instruction and issue an alarm.

[0009] Furthermore, the device further comprises:

[0010] A remote communicator is connected to the image analysis processor and is used to send alarm information to a pre-specified remote user terminal in response to the alarm instruction.

[0011] Furthermore, the marker has a predetermined standard shape or a predetermined standard pattern is drawn on the marker, and the image analysis processor extracts a target object with the standard shape or standard pattern as the marker by analyzing the real-time image.

[0012] Furthermore, the guide rod is in an inverted U shape, including an inner vertical rod and an outer vertical rod arranged parallel to each other and a horizontal rod connected between the top ends of the inner vertical rod and the outer vertical rod. The inner vertical rod passes through the through-holes and is connected to the floating base. The outer vertical rod is located outside the side wall of the closed container, and the marker is fixed to the bottom end of the outer vertical rod.

[0013] Furthermore, the liquid level alarm device also includes a height scale arranged on the outer surface of the side wall of the closed container close to the outer vertical rod and arranged along the lifting stroke of the outer vertical rod.

[0014] Furthermore, a guide sleeve is assembled in the through hole for guiding the guide rod to rise and fall, the guide rod passes through the center hole of the guide sleeve, and an elastic sealing ring is provided on the inner wall of the center hole of the guide sleeve to elastically abut the outer wall of the guide rod.

[0015] Furthermore, the surface of the floating substrate is also provided with a protective coating.

[0016] After adopting the above technical solution, the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention connects the marker placed outside the closed container with the floating base floating on the liquid surface by setting a guide rod, so that the marker is external and can rise and fall accordingly with the change of liquid level in synchronization with the floating base, and then the real-time image of the marker is captured by the camera, and the image analysis processor analyzes and determines the actual height position of the marker appearing in the real-time image and issues an alarm instruction to make the alarm sound when the actual height position meets the preset alarm condition. The detection principle and structure are simple and the accuracy is high, which is particularly suitable for monitoring and managing the liquid level of liquid contained in a container made of opaque material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural principle diagram of an optional embodiment of the liquid level alarm device of the present utility model.

[0018] Figure 2 This is a circuit principle block diagram of an optional embodiment of the liquid level alarm device of the present utility model.

[0019] Figure 3This is a structural principle diagram of another optional embodiment of the liquid level alarm device of the present utility model. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features in the embodiments of the present application may be combined with each other unless there is a conflict.

[0021] like Figure 1-Figure 3 As shown, an optional embodiment of the present invention provides a liquid level alarm device, comprising:

[0022] The buoy 1 comprises a floating base 10 disposed in a closed container A containing liquid and floating on the surface of the liquid, a guide rod 12 disposed on the floating base 10 and having its top end extending through a pre-set through-hole 12a in the top wall of the closed container A and extending outside the closed container A, and a marker 14 assembled on the guide rod 12 and located outside the closed container A.

[0023] A camera 3 is fixedly mounted on the outside of the closed container A and is used to capture a real-time image of the movement trajectory of the marker 14 as the liquid level rises and falls;

[0024] an image analysis processor 5 connected to the camera 3, configured to analyze the real-time image in real time to determine the actual height position of the marker 14 appearing in the real-time image and issue an alarm instruction when the actual height position meets a preset alarm condition; and

[0025] The alarm device 7 is connected to the image analysis processor 5 and is used to respond to the alarm instruction and generate an alarm.

[0026] In the embodiment of the present invention, a guide rod 12 is provided to connect a marker 14 placed outside the closed container A to a floating base 10 floating on the liquid surface, so that the marker 14 is externally placed and can rise and fall in synchronization with the floating base 10 in response to changes in the liquid level. A camera 3 then captures a real-time image of the marker 14 in a directionally controlled manner. An image analysis processor 5 analyzes and determines the actual height position of the marker 14 appearing in the real-time image and issues an alarm command to cause the alarm 7 to sound an alarm when the actual height position meets a preset alarm condition. The detection principle and structure are simple, with high accuracy, and are particularly suitable for monitoring and managing the liquid level of liquids contained in containers made of opaque materials.

[0027] In specific implementations, the alarm conditions can be pre-set based on the installation location and effective imaging range of the camera 3. For example, if the effective imaging range of the camera 3 is large enough to cover the entire lifting stroke of the marker 14, the alarm condition can be set to determine, through image analysis, that the actual height position of the marker 14 is greater than or equal to a certain upper height threshold. In some applications where the minimum liquid level also needs to be monitored, an alarm condition for the minimum liquid level can also be set: if the actual height position of the marker 14 is determined, through image analysis, to be less than or equal to a certain lower height threshold. If the effective imaging range of the camera 3 is small enough to not cover the entire lifting stroke of the marker 14, the imaging range of the camera 3 is typically limited to the warning area corresponding to the upper liquid level threshold. Furthermore, the alarm condition can also be set to require that the marker 14 appear completely in the real-time image to simplify image analysis and data judgment. Obviously, when multiple alarm conditions are preset simultaneously, only any one of the alarm conditions needs to be met for the alarm instruction to be triggered.

[0028] It can be understood that the image analysis processor 5 analyzes and extracts a certain target object (such as the marker 14) from the real-time image and calculates the actual height position of the target object and compares the actual height position with the pre-set alarm conditions to determine whether an alarm instruction needs to be issued. All of this can be achieved through existing conventional technical means (such as: image processing chips with corresponding functions, image processing programs, data processing chips, data comparison programs, etc.). This application only combines and utilizes these conventional technical means to achieve real-time monitoring and alarm management of the actual height position of the target object 14.

[0029] In an optional embodiment of the present invention, Figure 2 As shown, the device also includes:

[0030] Remote communicator 9 is connected to image analysis processor 5 and is configured to respond to the alarm command and send an alarm message to a pre-designated remote user terminal B. In this embodiment, remote communicator 9 is also provided to notify the pre-designated remote user terminal B when the liquid level is too high or too low, thereby preventing users who are not on-site from being informed of the alarm status of alarm 7.

[0031] In an optional embodiment of the present invention, Figure 1As shown, the marker 14 has a predetermined standard shape or a predetermined standard pattern 141 is drawn on the marker 14. The image analysis processor 5 extracts the target object with the standard shape or standard pattern from the real-time image by analyzing the real-time image as the marker 14. In this embodiment, the predetermined pattern 141 is directly drawn on the marker 14 or a specific standard shape is used. During image detection, the image analysis processor 5 extracts the target object with the standard shape or standard pattern from the real-time image as the marker 14, which improves image detection efficiency and reduces detection difficulty.

[0032] In an optional embodiment of the present invention, Figure 3 As shown, the guide rod 12 is in an inverted U-shape, comprising an inner vertical rod 121 and an outer vertical rod 123 arranged parallel to each other, and a crossbar 125 connected between the top ends of the inner vertical rod 121 and the outer vertical rod 123. The inner vertical rod 121 passes through the corresponding through-holes 12a and is connected to the floating base 10. The outer vertical rod 123 is located outside the side wall of the closed container A, and the marker 14 is fixed to the bottom end of the outer vertical rod 123. In this embodiment, when the closed container A is at a high height, the guide rod 12 adopts an inverted U-shape design, which allows the marker 14 to be positioned at a lower height, facilitating the installation, adjustment, and subsequent maintenance of the marker 14 and the camera 3.

[0033] In an optional embodiment of the present invention, Figure 3 As shown, the liquid level alarm device further includes a height scale 9 disposed on the outer surface of the side wall of the closed container A near the outer vertical rod 123 and arranged along the lifting and lowering travel of the outer vertical rod 113. In this embodiment, by also disposing the height scale 9 on the outer surface of the side wall of the closed container A and arranged along the lifting and lowering travel of the outer vertical rod 113, when the marker 14 rises and falls with changes in the liquid level, the height scale 9 serves as a reference object in the real-time image captured by the camera 3, which helps the image analysis processor 5 more accurately determine the current actual height position of the marker 14.

[0034] In an optional embodiment of the present invention, Figure 1 and Figure 3As shown, a guide sleeve 127 for guiding the guide rod 12 to rise and fall is assembled in the through-hole 12a. The guide rod 12 passes through the center hole of the guide sleeve 127. An elastic sealing ring 128 is also provided on the inner wall of the center hole of the guide sleeve 127 to elastically abut the outer wall of the guide rod 12. In this embodiment, by assembling the guide sleeve 127 in the through-hole 12a on the top wall of the closed container A, the guide rod 12 passes through the center hole of the guide sleeve 127 and can be smoothly raised and lowered under the guidance of the guide sleeve 127 without being skewed, thereby improving the accuracy of detection. The elastic sealing ring 128 is provided on the inner wall of the center hole of the guide sleeve 127, which can achieve a certain sealing effect at the position of the through-hole 12a to protect the liquid in the closed container A without affecting the raising and lowering of the guide rod 12.

[0035] In an optional embodiment of the present invention, a protective coating is further provided on the surface of the floating substrate 10. This embodiment prevents the liquid in the closed container A from corroding the floating substrate 10, thereby increasing the service life of the device.

[0036] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A liquid level alarm device, characterized in that: The device comprises: The buoy comprises a floating base placed in a closed container containing liquid and floating on the surface of the liquid, a guide rod provided on the floating base and having its top end extending through a predetermined perforation in a top wall of the closed container and extending outside the closed container, and a marker assembled on the guide rod and located outside the closed container; A camera, fixedly mounted on the outside of the closed container, for directionally capturing a real-time image of the marker; an image analysis processor connected to the camera, configured to analyze the real-time image in real time to determine the actual height position of the marker appearing in the real-time image and issue an alarm instruction when the actual height position meets a preset alarm condition; and An alarm is connected to the image analysis processor and is used to respond to the alarm instruction and issue an alarm.

2. The liquid level alarm device according to claim 1, characterized in that: The device further comprises: A remote communicator is connected to the image analysis processor and is used to send alarm information to a pre-specified remote user terminal in response to the alarm instruction.

3. The liquid level alarm device according to claim 1, characterized in that: The marker has a predetermined standard shape or a predetermined standard pattern is drawn on the marker, and the image analysis processor extracts a target object with the standard shape or standard pattern as the marker by analyzing the real-time image.

4. The liquid level alarm device according to claim 1, characterized in that: The guide rod is in an inverted U shape, including an inner vertical rod and an outer vertical rod arranged parallel to each other, and a horizontal rod connected between the top ends of the inner vertical rod and the outer vertical rod. The inner vertical rod passes through the through holes and is connected to the floating base. The outer vertical rod is located outside the side wall of the closed container, and the marker is fixed to the bottom end of the outer vertical rod.

5. The liquid level alarm device according to claim 4, characterized in that: The liquid level alarm device also includes a height scale arranged on the outer surface of the side wall of the closed container close to the outer vertical rod and arranged along the lifting stroke of the outer vertical rod.

6. The liquid level alarm device according to claim 1, characterized in that: A guide sleeve for guiding the guide rod to rise and fall is assembled in the through hole, and the guide rod passes through the central hole of the guide sleeve. An elastic sealing ring is provided on the inner wall of the central hole of the guide sleeve to elastically abut against the outer wall of the guide rod.

7. The liquid level alarm device according to claim 1, characterized in that: The surface of the floating substrate is also provided with a protective coating.

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