CN216645512U - Liquid level detection device - Google Patents

Abstract

The utility model provides a liquid level detection device, and relates to the technical field of liquid level detection. The liquid level detection device comprises a container, a power supply, a controller and a plurality of sensors, wherein the controller is respectively connected with the power supply and the sensors, the container is used for containing liquid to be detected, the sensors are arranged at intervals in the depth direction of the container, each sensor is respectively connected with the container, each sensor is used for outputting a first level signal to the controller in the state of being immersed by the liquid to be detected, the sensors are used for outputting a second level signal to the controller in the state of exposing the liquid to be detected, and the controller is used for acquiring the depth of the liquid to be detected according to the first level signal and the second level signal. The liquid level detection device is convenient to install, wide in application scene and particularly suitable for occasions with low liquid level detection precision, such as large reservoirs, chemical fertilizers of agricultural machinery equipment or fuel oil and the like.

Description

Liquid level detection device

technical field

The utility model relates to the technical field of liquid level detection, in particular to a liquid level detection device.

Background technique

For large reservoirs, swimming pools, reservoirs and other occasions where the detection accuracy of related liquid levels is low, the traditional liquid level detection method is to use a measuring ruler with a scale, and the detection personnel can visually identify the scale reached by the liquid level to measure. This measurement method is less efficient.

Utility model content

The purpose of the present utility model is to provide a liquid level detection device, which can detect the depth of the liquid level, and is suitable for occasions where the detection accuracy of the relevant liquid level such as large-scale reservoirs, swimming pools, reservoirs, agricultural machinery equipment, fertilizer or fuel oil is relatively low, High detection efficiency.

In a first aspect, the present utility model provides a liquid level detection device, comprising a container, a power supply, a controller and a plurality of sensors, the container is used for accommodating the liquid to be measured, and the controller is respectively connected with the power supply and the sensor. connected, the sensors are arranged at intervals in the depth direction of the container, each of the sensors is respectively connected to the container, and each of the sensors is used to report to the controller in the state of being submerged by the liquid to be tested outputting a first level signal, the sensor is used for outputting a second level signal to the controller when the liquid to be tested is exposed, and the controller is used for outputting a second level signal according to the first level signal and the The second level signal obtains the liquid level height of the liquid to be measured.

Further, the sensor adopts a capacitive proximity sensor.

Further, each of the sensors is connected with a signal wire, and one end of the signal wire away from the sensor is connected to the controller.

Further, a plurality of the sensors are connected to the controller in a parallel manner.

Further, a fixing rod is also included, the fixing rod is connected with the container, and the sensors are arranged on the fixing rod at intervals.

Further, the fixing rod is connected to the bottom of the container, and the axial direction of the fixing rod is consistent with the depth direction of the liquid to be measured.

Further, the plurality of sensors include a first sensor and a second sensor, the first sensor is closer to the bottom of the container than the second sensor, and the second sensor is arranged on a preset liquid level line.

Further, it also includes an alarm, the alarm is connected to the controller, and the controller controls the alarm to emit a signal in the state that the second sensor outputs a first level signal to the controller. warning sign.

Further, it also includes a display, the controller is connected with the display, and the display is used for displaying the liquid level depth.

Further, the display includes a screen and a plurality of display cells arranged on the screen, each of the display cells is provided with a signal light, the signal light is connected with the controller, and the signal light is used to light up all the display cells. The display cells are lit up in number corresponding to the depth of the liquid to be tested.

The beneficial effects of the embodiment of the present utility model are:

In the liquid level detection device provided by the embodiment of the present invention, the sensors are connected to the container and arranged at intervals in the depth direction of the container. Each sensor is connected to the controller. If the sensor is submerged by the liquid to be measured, it outputs to the controller. The first level signal, if the sensor is not submerged by the liquid to be tested, it will output the second level signal to the controller, and the controller can obtain the liquid level of the liquid to be tested according to the received first level signal and the second level signal. The liquid level detection device is suitable for occasions with low requirements for related liquid level detection accuracy such as large reservoirs, swimming pools, reservoirs, agricultural machinery equipment, fertilizer or fuel oil, etc. It is easy to install and has high detection efficiency.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of the layout of a sensor of a liquid level detection device provided by an embodiment of the present invention;

2 is a schematic block diagram of the composition of a liquid level detection device provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the layout of display cells of the liquid level detection device provided by the embodiment of the present invention.

Icons: 10-container; 20-fixed rod; 30-sensor; 31-first sensor; 33-second sensor; 35-signal line; 40-controller; 50-power supply; 60-alarm; 70-display; 71 - screen; 73 - display cell.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments 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. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, only for the convenience of describing the present utility model and simplifying the description, not Indicates or implies that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example

Referring to FIGS. 1 to 3 , a liquid level detection device provided by an embodiment of the present invention includes a container 10 , a power supply 50 , a controller 40 and a plurality of sensors 30 . The container 10 is used for containing the liquid to be measured, and the controller 40 are respectively connected to the power supply 50 and the sensor 30, the sensors 30 are arranged at intervals in the depth direction of the container 10, each sensor 30 is respectively connected to the container 10, and each sensor 30 is used to output to the controller 40 in the state of being submerged by the liquid to be tested The first level signal, the sensor 30 is used to output the second level signal to the controller 40 when the liquid to be tested is exposed, and the controller 40 is used to obtain the liquid to be tested according to the first level signal and the second level signal the liquid level height. The liquid level detection device is easy to install and flexible to use, and is suitable for occasions such as large reservoirs, swimming pools, reservoirs, agricultural machinery equipment, fertilizers or fuels with low liquid level detection accuracy. The measurement efficiency is high, and the measurement process is safe and risk-free.

It should be understood that the actual height represented by the installation position of each sensor 30, that is, the liquid level depth corresponding to the installation position of each sensor 30, is pre-stored in the controller 40. Since the sensors 30 located below the liquid level all output the first level signal, The sensors 30 above the liquid level all output the second level signal, and according to the first level signal or the second level signal output by each sensor 30, the controller 40 can determine that the liquid level is between two sensors 30, Then, according to the pre-stored liquid level depth corresponding to each sensor 30, the liquid level height of the liquid to be measured can be obtained.

In this embodiment, the sensor 30 is a capacitive proximity sensor 30 , and the capacitive proximity sensors 30 are arranged at intervals in the depth direction of the container 10 . When the capacitive proximity sensor 30 is below the liquid level, that is, submerged by the liquid, the capacitive proximity sensor 30 outputs a first level signal, that is, a low-level signal, to the controller 40; when the capacitive proximity sensor 30 is at the liquid level Above, that is, in the state that is not submerged by the liquid, the capacitive proximity sensor 30 is in a normal state and outputs a second level signal, that is, a high level signal, to the controller 40 . Optionally, each sensor 30 is connected with a signal wire 35 , and one end of the signal wire 35 away from the sensor 30 is connected to the controller 40 , that is, the sensor 30 and the controller 40 realize signal transmission through the signal wire 35 . Of course, it is not limited to this, and the signal transmission between the sensor 30 and the controller 40 may also be transmitted through Bluetooth, wireless network, local area network, etc., which is not specifically limited here.

The sensor 30 in this embodiment adopts the capacitive proximity sensor 30, which has the waterproof performance of IP67 level, and its waterproof performance is good. It has good anti-interference performance for possible liquid inclination, liquid sputtering, etc., and reduces errors in the measurement process. sentence. Of course, in other optional embodiments, the sensor 30 may also use other switch signal sensors 30, which are not specifically limited here.

Optionally, multiple sensors 30 are connected to the controller 40 in parallel. In this way, multiple sensors 30 do not interfere with each other, and each sensor 30 is relatively independent. When one of the sensors 30 fails, it will not affect the detection results of other sensors 30, and has little impact on the overall detection results. Adaptability stronger.

Optionally, the liquid level detection device further includes a fixing rod 20, a display 70 and an alarm 60, the fixing rod 20 is connected with the container 10 and is connected to the bottom of the container 10, and one end of the fixing rod 20 away from the bottom of the container 10 can be used for The liquid level of the liquid to be measured is exposed, the sensors 30 are arranged on the fixed rod 20 at intervals, and the axial direction of the fixed rod 20 is consistent with the depth direction of the liquid to be measured. The fixing rod 20 is fixedly connected to the bottom of the container 10 , and the fixing rod 20 is perpendicular to the bottom of the container 10 . In this way, the height corresponding to the installation position of the sensor 30 can more accurately reflect the actual liquid level of the liquid to be measured. The plurality of sensors 30 may be arranged at equidistant intervals in the depth direction of the container 10, or may be arranged at unequal intervals according to the actual detection scene, which is not specifically limited here.

The plurality of sensors 30 include a first sensor 31 and a second sensor 33, the first sensor 31 is closer to the bottom of the container 10 than the second sensor 33, the second sensor 33 is set on the preset liquid level line, and the second sensor 33 is used for Implement early warning. When the liquid level of the liquid to be measured submerges the second sensor 33 , the second sensor 33 outputs a first level signal, that is, a low level signal, to the controller 40 , and the controller 40 receives the low level signal output by the second controller 40 . After the level signal, the alarm 60 is controlled to issue an alarm signal to realize the high liquid level warning function, which can effectively prevent the overflow of the water surface. The alarm signal includes, but is not limited to, a voice signal, a buzzer sound signal, a light signal or a warning light lighting signal, etc., which are not specifically limited here. It should be noted that the number of the first sensors 31 may be multiple, and the number of the second sensors 33 may be one. The number of sensors 33.

In some other optional embodiments, one or several sensors 30 may also be selected from the plurality of first sensors 31 as the low liquid level early warning sensor 30. Since the first sensor 31 is relatively close to the bottom of the container 10, if some One or several first sensors 31 output a high-level signal to the controller 40, indicating that the liquid level is not submerged, that is, the liquid level of the liquid to be tested in the container 10 is lower than the water shortage warning liquid level, and is in a low liquid level state, thereby To achieve the purpose of low liquid level warning.

In this embodiment, the controller 40 is connected to the display 70, and the display 70 is used to display the liquid level depth. The display 70 includes a screen 71 and a plurality of display cells 73 arranged on the screen 71. The plurality of display cells 73 are arranged in sequence, and each display cell 73 is provided with a signal light, which is connected to the controller 40, and the signal light is used for lighting The cell 73 is illuminated, and the number of the cells 73 illuminated corresponds to the depth of the liquid to be measured. It can be understood that the higher the liquid level of the liquid to be tested in the container 10 is, the more the number of the display cells 73 is lit up. For example, the number of display cells 73 is four, and they are arranged on the screen 71 in order from bottom to top. When the liquid level of the liquid to be measured reaches or exceeds the full liquid level preset line, all the display cells 73 are lit up, and all four display cells 73 are lit up, that is, they are in a full cell state. When the liquid level of the liquid to be measured reaches the half-level preset line, half of the display cells 73 are lit, and the two lower display cells 73 are lit, that is, in a half-cell state. By arranging the display unit 73 on the display 70 and the screen 71, the liquid level of the liquid to be measured can be judged intuitively, the operation is convenient, and the practicability is strong. Optionally, the liquid level height value may also be displayed on the screen 71, so that the measuring personnel can intuitively judge the current liquid level situation.

It can be understood that the controller 40 can adopt a general-purpose processor, including but not limited to a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it can also be a digital signal processor (Digital Signal Processor) , DSP for short), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Of course, the controller 40 can also be integrated into a PLC controller 40, a single-chip microcomputer, etc., which is not specifically limited here.

The working principle of the liquid level detection device provided by the embodiment of the present invention is as follows:

The fixing rod 20 is vertically installed in the container 10, one end of the fixing rod 20 is connected to the bottom of the container 10, and the other end is used to expose the liquid level of the liquid to be measured; the sensors 30 are arranged on the fixing rod 20 at intervals in the depth direction of the container 10 , if the sensor 30 is submerged by liquid, it outputs a low-level signal to the controller 40; if the sensor 30 is not submerged by liquid, it outputs a high-level signal to the controller 40, and the controller 40 pre-stores the signals represented by each sensor 30 For the actual height value, the controller 40 can obtain the position of the liquid level, that is, the liquid level height, according to the received high-level signal and low-level signal of each sensor 30 . It can be understood that the height corresponding to the uppermost sensor 30 in the submerged sensors 30 (ie, the sensors 30 that emit a low-level signal) is the liquid level height of the liquid to be measured. The liquid level height of the liquid to be measured is displayed on the screen 71 of the display 70 , and the liquid level state can be intuitively judged by the number of lights on the display cells 73 . In addition, if the second sensor 33 set on the preset liquid level line is submerged, it also has a liquid level overflow alarm function, which is highly practical.

If the detection accuracy of the liquid level detection device needs to be improved, it is only necessary to install more sensors 30 on the fixed rod 20. The smaller the distance between two adjacent sensors 30 in the depth direction of the container 10, the higher the liquid level detection accuracy higher. The more sensors 30, the more situations that can detect different depths, and only the corresponding sensor 30 needs to be replaced during maintenance, which is convenient to operate and easy to maintain and replace.

The liquid level detection device provided by the embodiment of the present invention has the following beneficial effects:

The liquid level detection device provided by the embodiment of the present invention is convenient to install, flexible to use, easy to operate, and safe and risk-free in the measurement process. The sensor 30 adopts the capacitive proximity sensor 30, which has good waterproof performance, strong anti-interference ability against liquid sticking to the surface of the sensor 30, and low misjudgment rate. Each sensor 30 is independent of each other, does not affect each other, has high reliability, and is convenient for maintenance and replacement. Different numbers of sensors 30 are set according to different application scenarios, so as to meet the test accuracy of different requirements. The measurement results can be visually displayed through the display 70, so as to realize visual measurement, and it is convenient to judge the current state of the liquid level. The liquid level detection device is suitable for occasions where the detection accuracy of the relevant liquid level such as large-scale reservoirs, swimming pools, reservoirs, agricultural machinery equipment, fertilizer or fuel oil is low, and the detection efficiency is high, and it also has a full liquid level warning function.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. a liquid level detection device, is characterized in that, comprises container, power source, controller and multiple sensors, and described container is used for accommodating liquid to be measured, and described controller is connected with described power source and described sensor respectively, The sensors are arranged at intervals in the depth direction of the container, each of the sensors is respectively connected to the container, and each of the sensors is used to output the first number to the controller in the state of being submerged by the liquid to be tested. a level signal, the sensor is used for outputting a second level signal to the controller when the liquid to be tested is exposed, and the controller is used for according to the first level signal and the second level signal The level signal obtains the liquid level height of the liquid to be measured. 2 . The liquid level detection device according to claim 1 , wherein the sensor adopts a capacitive proximity sensor. 3 . 3 . The liquid level detection device according to claim 1 , wherein each of the sensors is connected with a signal line, and one end of the signal line away from the sensor is connected to the controller. 4 . 4 . The liquid level detection device according to claim 1 , wherein a plurality of the sensors are connected to the controller in a parallel manner. 5 . 5 . The liquid level detection device according to claim 1 , further comprising a fixing rod, the fixing rod is connected with the container, and the sensors are arranged on the fixing rod at intervals. 6 . 6 . The liquid level detection device according to claim 5 , wherein the fixing rod is connected to the bottom of the container, and the axial direction of the fixing rod is consistent with the depth direction of the container. 7 . 7 . The liquid level detection device according to claim 6 , wherein the plurality of sensors comprises a first sensor and a second sensor, and the first sensor is closer to the bottom of the container than the second sensor. 8 . , the second sensor is arranged on the preset liquid level line. 8 . The liquid level detection device according to claim 7 , further comprising an alarm, the alarm is connected to the controller, and the second sensor outputs a first level to the controller. 9 . In the state of the signal, the controller controls the alarm to issue an alarm signal. 9 . The liquid level detection device according to claim 1 , further comprising a display, the controller is connected to the display, and the display is used to display the depth of the liquid level. 10 . 10. The liquid level detection device according to claim 9, wherein the display comprises a screen and a plurality of display cells arranged on the screen, each of the display cells is provided with a signal light, and the signal light Connected with the controller, the signal light is used to light up the display cells, and the number of the display cells illuminated corresponds to the depth of the liquid to be tested.

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