CN220856436U

CN220856436U - Liquid level switch with gesture detection

Info

Publication number: CN220856436U
Application number: CN202322569584.1U
Authority: CN
Inventors: 毕增亮; 亓燕芹; 刘龙; 毕瑞亮
Original assignee: Qingdao Huiying Technology Co ltd
Current assignee: Qingdao Huiying Technology Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-26
Anticipated expiration: 2033-09-21

Abstract

Disclosed is a liquid level switch with gesture detection, comprising: the body and the detection rod body are connected with the body. The main body comprises a shell and a processing module positioned in the shell; the processing module comprises a signal processing unit and an attitude detection sensor which are electrically connected. The lower end of the detection rod body is plugged, and the detection rod body comprises an inner pipe body and an outer pipe body sleeved outside the inner pipe body; an annular space is arranged between the inner pipe body and the outer pipe body; the upper end of the detection rod body is also provided with a vent hole, and the lower end of the detection rod body is provided with a liquid inlet hole which is communicated with the annular space; a magnetic induction component with an adjustable position is arranged in the annular space; the magnetic induction component is electrically connected with the signal processing unit.

Description

Liquid level switch with gesture detection

Technical Field

The utility model relates to the technical field of liquid level switches, in particular to a liquid level switch with gesture detection.

Background

The existing liquid level switch generally has a simple liquid level detection function, and cannot detect and control the gesture of a container or equipment, so that accurate liquid level detection and control of a switch state cannot be realized under some special conditions.

In addition, in some liquid level switches with magnetic induction alarm, although the magnetic induction alarm is provided with a plurality of gears, the intervals between the gears are larger, and the position adjustment precision cannot be enough, so that the alarm liquid level cannot be accurately regulated.

Disclosure of utility model

In view of at least one of the above problems, the present utility model provides a liquid level switch with gesture detection, which specifically comprises the following steps:

a liquid level switch with gesture detection, comprising: the detection device comprises a main body and a detection rod body connected with the main body;

The main body comprises a shell and a processing module positioned in the shell; the processing module comprises a signal processing unit and an attitude detection sensor which are electrically connected. The lower end of the detection rod body is plugged, and the detection rod body comprises an inner pipe body and an outer pipe body sleeved outside the inner pipe body; an annular space is arranged between the inner pipe body and the outer pipe body; the upper end of the detection rod body is also provided with a vent hole, and the lower end of the detection rod body is provided with a liquid inlet hole which is communicated with the annular space; a magnetic induction component with an adjustable position is arranged in the annular space; the magnetic induction component is electrically connected with the signal processing unit.

As a preferable aspect, a protective packaging structure for accommodating the attitude detection sensor is further provided in the housing, or an accommodating case for accommodating the attitude detection sensor is further provided in the housing; the outer wall of the containing shell is coated with an anti-corrosion coating.

As a preferred aspect, the attitude detection sensor includes a three-axis accelerometer and a three-axis gyroscope.

As a preferred aspect, the magnetic induction assembly includes a magnetic induction member detachably mounted on the outer wall of the inner tube body and a floatable magnetic member; the magnetic induction piece is electrically connected with the signal processing unit.

As a preferable aspect, the outer wall of the inner tube body is provided with an external thread portion of a predetermined length; the magnetic induction piece thread connecting sleeve is arranged outside the external thread part.

As a preferred aspect, the magnetic induction member is also detachably connected with an anti-rotation positioning member for positioning the magnetic induction member at the position.

In a preferred aspect, the external thread portion is located between the liquid inlet hole and the vent hole.

As a preferable aspect, the outer wall of the inner tube body or the inner wall of the outer tube body is also detachably provided with a blocking protrusion above the liquid inlet hole; the blocking protrusion is located below the magnetic member.

In a preferred aspect, the blocking protrusion includes a blocking ring screwed to a lower end of the male screw.

As a preferred aspect, the upper end of the outer tube body is screwed to the lower end of the housing; an intermediate connector is arranged between the lower ends of the inner pipe body and the outer pipe body; optionally, the inner wall of the intermediate connector is in threaded connection with the upper end of the inner tube.

The liquid level switch with the gesture detection in one embodiment of the application is simultaneously provided with the capacitive liquid level switch, the magnetic induction component and the gesture detection sensor, and the gesture detection sensor is used for detecting the gesture of the liquid level switch so as to accurately detect the liquid level change under different gestures and control the opening or closing of equipment and other control measures according to detection results.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a fluid level switch with gesture detection in accordance with one embodiment of the present application.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, shall fall within the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the liquid level switch with gesture detection according to one embodiment of the present application is a capacitive liquid level switch, and specifically, the liquid level switch with gesture detection includes: a main body 100, a detecting rod body 200 connected with the main body 100.

The main body 100 is an electronic control unit. The main body 100 includes a housing 101, a process module 102 located within the housing 101; the processing module 102 includes an electrically connected signal processing unit and an attitude detection sensor 104. A protective packaging structure 105 for accommodating the gesture detection sensor 104 is also provided in the housing 101. The signal processing unit is a circuit board structure, and the gesture detection sensor 104 includes a tri-axis accelerometer and a tri-axis gyroscope. For example, the gesture detection sensor 104 may employ an MPU6050 that may be directly connected to a signal processing unit of the circuit board structure. The protection packaging structure 105 can be a packaging layer formed by epoxy resin or hot melt adhesive, and is packaged in the packaging layer to perform moisture-proof, electric-proof and corrosion-proof protection, so that the whole service life of the equipment is prolonged. Of course, the signal processing unit may also adopt a three-protection design, and the protection casing 101 or the packaging protection layer is also disposed outside the signal processing unit, which is not limited in this embodiment.

In other possible embodiments, a housing case for mounting the posture detection sensor 104 is further provided in the housing 101. The outer wall of the containment vessel is coated with a corrosion-resistant coating such as a three-way paint.

The main body 100 is fixedly connected to the upper end of the detecting rod body 200. The side wall of the housing 101 is provided with a terminal 103, and a cable 300 electrically connected to the signal passes through the terminal 103 to transmit the measurement signal to the outside. The inside of the terminal 103 is provided with a sealing gasket body made of silica gel or rubber for the cable 300 to pass through, so that the liquid inside the liquid level switch is prevented from leaking outwards through the terminal 103, and the reliability of the liquid level switch is improved. The signal processing unit is electrically connected with the detecting rod body 200, and the detecting rod body 200 forms a capacitor structure.

The lower end of the detection rod body 200 is plugged, and comprises an inner pipe body 201 and an outer pipe body 202 sleeved outside the inner pipe body 201. An annular space 205 is provided between the inner and outer tubes 201, 202. The upper end of the detecting rod body 200 is also provided with a vent hole 210, and the lower end is provided with a liquid inlet 215 which is communicated with the annular space 205; a magnetic induction component with adjustable position is arranged in the annular space 205; the magnetic induction component is electrically connected with the signal processing unit.

The lower end of the detecting rod body 200 is connected with a plugging cap 208 which can be made of plastic material in a plugging way. The plugging cap 208 is connected between the lower end of the inner pipe body 201 and the lower end of the outer pipe body 202 in a pluggable manner, and an O-shaped sealing ring is arranged between the plugging cap 208 and the inner pipe body 202. The blocking cap 208 is inserted between the lower end of the inner tube 201 and the lower end of the outer tube 202, thereby blocking the entire lower end of the sensing rod 200. The inner pipe 201 and the outer pipe 202 are communicated through the liquid inlet 215, the liquid inlet 215 penetrates the inner pipe 202 and the outer pipe 202 in sequence, so that liquid can enter the annular space 205 from the outside of the detection rod 200, and the capacitance value of the capacitor formed by the inner pipe 202 and the outer pipe 202 is changed.

The outer pipe 202 and the inner pipe 201 are detachably connected to the lower end of the main body 100, specifically, the upper end of the outer pipe 202 is in threaded connection with the lower end of the housing 101; an intermediate connector 108 made of an insulating material is provided between the lower ends of the inner tube 201 and the outer tube 202. The inner wall of the intermediate connector 108 is screwed to the upper end of the inner tube 201. The intermediate connector 108 may pass through a wire that electrically connects the magnetically sensitive component with the signal processing unit. The intermediate connection 108 may include upper and lower press rings and a flexible seal between the upper and lower press rings. The flexible sealing body can adopt insulating rubber filler for the lead to pass through and keep sealing under the compression action of the upper and lower compression rings. The inner and outer walls of the upper and lower press rings are provided with threads, and the inner pipe 201 is connected with the lower end of the housing 101 by threads. The upper end of the outer tube 202 is connected to the lower end of the housing 101 by external threads. The vent holes 210 are similar to the liquid inlet holes 215, penetrate the inner and outer tubes 202 and are led into the inner tube 201 to keep the liquid level the same as the outside during liquid inlet, so that the accurate measurement of the liquid level is facilitated.

The magnetic induction assembly includes a magnetic induction member 230 removably mounted to the outer wall of the inner tube 201 and a floatable magnetic member 235. The magnetic induction member 230 is electrically connected to the signal processing unit.

In order to realize stepless adjustment of the position of the magnetic induction member 230 and improve the monitoring accuracy of the target monitoring liquid level, the outer wall of the inner tube 201 is provided with an external thread portion 220 with a predetermined length. The screw coupling sleeve of the magnetic induction member 230 is disposed outside the external screw part 220. The magnetic induction element 230 may be a hall element and is fixed on an annular base. The annular base is provided on the externally threaded portion 220 of the inner tube body 201 through a screw coupling sleeve. In addition, graduations may be provided on the outer wall of the inner tube 201 and extend with the external thread 220 to indicate where the magnetic induction member 230 is located.

The magnetic member 235 includes a foam ring, and a permanent magnet block fixedly provided on the foam ring. The permanent magnet blocks can be circumferentially and dispersedly embedded in the caulking grooves on the upper surface of the foam ring. The magnetic member 235 floats with the liquid surface as the foam ring enters the liquid in the annular space 205. When the target fluid level (such as an alarm fluid level) is reached, the magnetic induction element 230 induces a certain intensity of magnetic field of the magnetic element 235, and sends out an induction signal. By the arrangement of the external thread part 220, the magnetic induction part 230 can realize accurate adjustment of the upper and lower positions, and achieve stepless gear. The external thread 220 is located between the liquid inlet 215 and the air vent 210 to ensure an adjustable alarm range of the magnetic induction member 230.

To avoid undesired displacement of the magnetic induction element 230, the magnetic induction element 230 is also detachably connected with an anti-rotation positioning element for positioning it in place. The anti-rotation positioning piece can be an anti-rotation pin or a positioning pin. The positioning pin is in threaded connection with the magnetic induction piece 230 in a mode of transversely and vertically arranging the inner pipe body 201, and the effect of anti-rotation positioning is achieved by rotating and adjusting the pressing force of the positioning pin transversely pressing the wall of the inner pipe body 201. Or the outer wall of the inner pipe body 201 is also provided with a vertical anti-rotation groove, and the locating pin or the locating pin transversely stretches into the vertical anti-rotation groove to perform anti-rotation locating.

To avoid the magnetic member 235 falling below the liquid inlet 215 without liquid inlet and being blocked below the liquid inlet 215 due to deposited impurities, the outer wall of the inner tube 201 or the inner wall of the outer tube 202 is detachably provided with a blocking protrusion 204 above the liquid inlet 215; the blocking protrusion 204 is located below the magnetic member 235. By blocking the limit of the protrusion 204, the magnetic member 235 is held above the liquid inlet 215, and the annular space 205 below the liquid inlet 215 can constitute a long-term impurity reserve tank. Specifically, the blocking protrusion 204 includes a blocking ring screwed to the lower end of the external screw part 220.

When the position of the magnetic induction piece 230 needs to be adjusted, the plugging cap 208 is pulled out, the outer tube 202 is detached from the lower end of the shell 101, the magnetic induction piece 230 is exposed, and the magnetic induction piece 230 is moved along the length direction of the inner tube 201 by rotating the magnetic induction piece 230 until the magnetic induction piece 230 is rotated to the target liquid level position.

When the detecting rod 200 measures the liquid level in the container, the positive electrode of the inner tube 201 as a capacitor and the negative electrode of the outer tube 202 as a capacitor form a coaxial capacitor. The liquid level in the detected container enters the annular space 205 between the outer pipe 202 and the inner pipe 201 through the liquid inlet 215, the vent holes 210 can maintain the balance of the air pressure inside and outside the detecting rod body 200 to form a communicating vessel, and the detected liquid level in the pipe of the inner pipe 201 and the annular space 205 is always consistent with the detected liquid level in the container.

When the monitored liquid level of the medium to be measured changes, the capacitance value between the inner pipe 202 and the outer pipe 202 is changed, and the liquid level switch transmits and converts the capacitance signal into a voltage signal through an internal signal processing unit to be output. When the liquid level switch or the container is inclined, the gesture detection sensor 104 transmits gesture inclination data to the signal processing unit for processing and conversion, and outputs the gesture inclination data outwards.

The level switch cable 300 is connected to a control device 500 (host computer or control system). The cable 300 connects the processing module 102 with an upper computer or control system for remote monitoring and control. The signal processing unit has a signal output terminal and a digital-to-analog conversion circuit (AD conversion circuit). To achieve more accurate detection, a filter circuit and a signal amplifying circuit may be added appropriately, and the processed detection signal is transmitted to the control device 500 through the signal output terminal.

The liquid level switch may have a variety of switch control schemes, one of which is to change to a target capacitance value by detecting a capacitance value. The liquid level switch is arranged at a proper position of the container wall, the detecting rod body 200 is positioned inside the container and can be immersed by a measuring medium, a capacitor is formed between the inner pipe body 202 and the outer pipe body 202, the material of the container wall is not needed to be considered, and the application range is wider. Of course, the capacitive level switch uses the capacitance value to calculate the liquid level, and reference is made to the disclosure of CN219084187U, for example, and will not be repeated here.

The gesture detection sensor 104 is configured to detect a gesture change of the liquid level switch, and the output signal thereof is related to the gesture of the liquid level switch. In the liquid level switch with gesture detection, the liquid level sensor (the inner and outer pipe 202 and the processing module 102) and the gesture detection sensor 104 operate independently of each other, and their output signals are respectively transmitted to the control device 500 for processing.

The control device 500 outputs a corresponding control signal, for example, drives an external device or an alarm device, etc., according to the signal input by the liquid level switch. The control device 500 first receives the output liquid level signal of the liquid level switch, and monitors the liquid level in real time. The control device 500 may also compare according to a preset liquid level threshold to determine whether the liquid level reaches a preset value. If the liquid level reaches the preset value, the control device 500 outputs a corresponding control signal, for example, drives the external device to be turned on or off. Meanwhile, the control device 500 also receives the output signal of the gesture detection sensor 104, and compares the output signal according to a preset gesture threshold to determine whether the gesture of the liquid level switch changes. If the posture changes, the control device 500 also performs processing according to preset logic, such as adjusting the accuracy of the liquid level detection (the accurate liquid level can be obtained by using a trigonometric function based on the inclination angle obtained by the posture detection sensor), performing posture correction, and the like.

For safety, the magnetic sensing component is electrically connected to an alarm by the processing module 102, and when the magnetic sensing component is triggered (the magnetic member 235 floats to the magnetic sensing member 230 to trigger), an alarm operation is performed, and the operations such as forced closing are adopted, so that the liquid level is monitored in real time through the capacitive liquid level switch formed by the inner and outer tubes 202, and the gesture detection sensor 104 detects whether the gesture of the liquid level switch is undesirably deviated, so that the liquid level data is corrected. Of course, the liquid level switch and the container posture (especially suitable for the marine liquid level switch) can also be monitored in real time according to the data detected by the posture detection sensor 104. When the oil level is detected, the magnetic induction assembly can detect the highest liquid level when the liquid level is too high or too low, and alarm and oil injection disconnection operation is performed when the magnetic induction assembly is triggered.

Any numerical value recited herein includes all values of the lower and upper values that increment by one unit from the lower value to the upper value, as long as there is a spacing of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.

Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional.

Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. A liquid level switch with gesture detection, comprising: the detection device comprises a main body and a detection rod body connected with the main body;

The main body comprises a shell and a processing module positioned in the shell; the processing module comprises a signal processing unit and a gesture detection sensor which are electrically connected, wherein the lower end of the detection rod body is plugged, and the processing module comprises an inner pipe body and an outer pipe body sleeved outside the inner pipe body; an annular space is arranged between the inner pipe body and the outer pipe body; the upper end of the detection rod body is also provided with a vent hole, and the lower end of the detection rod body is provided with a liquid inlet hole which is communicated with the annular space; a magnetic induction component with an adjustable position is arranged in the annular space; the magnetic induction component is electrically connected with the signal processing unit.

2. The liquid level switch with posture detection according to claim 1, wherein a protective packaging structure for accommodating the posture detection sensor is further provided in the housing, or an accommodating case for accommodating the posture detection sensor is further provided in the housing; the outer wall of the containing shell is coated with an anti-corrosion coating.

3. The liquid level switch with gesture detection of claim 1, wherein the gesture detection sensor comprises a tri-axial accelerometer and a tri-axial gyroscope.

4. The liquid level switch with gesture detection of claim 1, wherein the magnetic induction assembly comprises a magnetic induction piece detachably mounted on the outer wall of the inner tube body and a floatable magnetic piece; the magnetic induction piece is electrically connected with the signal processing unit.

5. The liquid level switch with gesture detection as set forth in claim 4, wherein the outer wall of the inner tube body is provided with an external screw thread portion of a predetermined length; the magnetic induction piece thread connecting sleeve is arranged outside the external thread part.

6. The liquid level switch with gesture detection of claim 4 wherein the magnetic induction member is further detachably connected with an anti-rotation positioning member for positioning the magnetic induction member at the position.

7. The liquid level switch with gesture detection of claim 5, wherein the external threaded portion is located between the liquid inlet hole and the vent hole.

8. The liquid level switch with gesture detection of claim 5, wherein the outer wall of the inner tube body or the inner wall of the outer tube body is further detachably provided with a blocking protrusion above the liquid inlet hole; the blocking protrusion is located below the magnetic member.

9. The liquid level switch with gesture detection of claim 8, wherein the blocking protrusion comprises a blocking ring screwed to the lower end of the external thread.

10. The liquid level switch with gesture detection of claim 1, wherein the upper end of the outer tube body is screwed to the lower end of the housing; an intermediate connector is arranged between the lower ends of the inner pipe body and the outer pipe body; optionally, the inner wall of the intermediate connector is in threaded connection with the upper end of the inner tube.