Liquid level height continuous detection sensor

Abstract

The utility model discloses a sensor for continuously detecting the height of a liquid level. The sensor comprises a substrate, a magnetic switch, a magnetic suspension trigger piece and a resistor, a first circuit and a second circuit are arranged on the substrate, a plurality of magnetic switches are arranged between the first circuit and the second circuit in parallel, the two ends of each magnetic switch are electrically connected with the first circuit and the second circuit respectively, and a resistor is connected between every two adjacent magnetic switches in series. As the magnetic suspension triggering piece ascends and descends to different heights along with the liquid level, the magnetic suspension triggering piece can trigger the magnetic switches of different heights, the magnetic switches are closed, so that resistors of different numbers can be connected into a circuit in series, and the resistance value of the circuit is changed; the position information of the liquid level can be obtained according to the resistance value information of the circuit, and continuous detection of the liquid level height is achieved. And a plurality of magnetic switches and a plurality of resistors are integrated on one substrate, so that the overall appearance size of the inductor can be reduced, and a user can conveniently install and use the inductor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a sensor for continuous detection of liquid level. Background Art

[0002] Liquid level sensors are commonly used in the field of automation when it comes to liquid level detection, but common liquid level sensors are often used for detection at a set height, that is, the sensor can only determine whether the liquid level has reached the set height, but cannot continuously detect changes in the liquid level within a certain range. Of course, it is also possible to partially achieve the effect of continuous detection by installing multiple conventional liquid level sensors, but this will not only increase costs, increase installation difficulty, and require the sensor to occupy a large space, but will also cause problems such as difficulty in matching circuit signals and low detection accuracy. These problems make the idea of ​​installing multiple conventional sensors to achieve continuous detection of liquid level height unrealistic. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a liquid level continuous detection sensor, which can continuously detect the liquid level and reduce the overall size of the sensor to facilitate installation and use by users.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a liquid level continuous detection sensor, including a substrate, a magnetic switch, a magnetic suspension trigger and a resistor; a first circuit and a second circuit are provided on the substrate, a plurality of the magnetic switches are arranged in parallel between the first circuit and the second circuit, the two ends of each magnetic switch are electrically connected to the first circuit and the second circuit respectively, a resistor is connected in series between each two adjacent magnetic switches, and the resistor is arranged on the first circuit and / or the second circuit; the magnetic suspension trigger is suspended on the liquid surface of the measured liquid, and can rise and fall with the rise and fall of the liquid surface, the magnetic suspension trigger can trigger the magnetic switch closest to it, so that the magnetic switch changes from an open state to a closed state, and changes from a closed state to an open state after moving away from the magnetic switch.

[0005] Compared with the prior art, the beneficial effect of the utility model is that: the sensor sets a plurality of magnetic switches in parallel on the substrate, and connects a resistor in series between each two adjacent magnetic switches. When the magnetic suspension trigger part rises and falls with the rise and fall of the liquid level, the magnetic suspension trigger part can trigger the magnetic switch closest to it, so that the magnetic switch changes from an open state to a closed state. At this time, the magnetic switch can make the first circuit, the second circuit and the resistor connected in series to the circuit electrically conductive. When the liquid level position changes, the magnetic suspension trigger part moves away from the magnetic switch, and the magnetic switch changes from a closed state to an open state, and the circuit is disconnected. Therefore, as the magnetic suspension trigger part rises and falls to different heights with the liquid level, the magnetic suspension trigger part can trigger magnetic switches of different heights, so that different numbers of resistors are connected in series to the circuit and are turned on, thereby changing the resistance value of the circuit. According to the resistance value information of the circuit, the position information of the liquid level can be obtained, and the continuous detection of the liquid level height is realized. In addition, the sensor integrates a plurality of magnetic switches and a plurality of resistors on a substrate, which can not only reduce the overall size of the sensor, but also facilitate installation and use by users.

[0006] In the above-mentioned liquid level continuous detection sensor, the substrate is a PCB board, and the first circuit and the second circuit are circuits printed on the PCB board.

[0007] In the above-mentioned liquid level continuous detection sensor, the distance between each two adjacent magnetic switches is equal.

[0008] In the above-mentioned liquid level continuous detection sensor, the resistance value of the resistor between every two adjacent magnetic switches is equal.

[0009] In the above-mentioned liquid level continuous detection sensor, the plurality of resistors are located on the same side.

[0010] The above-mentioned liquid level continuous detection sensor, the magnetic switch is a reed switch.

[0011] In the above-mentioned liquid level continuous detection sensor, the magnetic suspension trigger is a magnetic float.

[0012] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of a sensor according to an embodiment of the utility model at a first liquid level height;

[0014] Figure 2 A schematic diagram of a sensor according to an embodiment of the utility model at a second liquid level height;

[0015] Figure 3A schematic structural diagram of a substrate according to an embodiment of the utility model;

[0016] Figure 4 It is a structural schematic diagram of a magnetic switch according to an embodiment of the utility model.

[0017] Description of the accompanying drawings: 100 substrate, 110 first circuit, 120 second circuit, 200 magnetic switch, 210 terminal, 300 magnetic suspension trigger, 400 resistor. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below. Figures 1 to 4 The embodiment of the utility model provides a liquid level continuous detection sensor, including a substrate 100, a magnetic switch 200, a magnetic suspension trigger 300 and a resistor 400. A first circuit 110 and a second circuit 120 are provided on the substrate 100, and a plurality of magnetic switches 200 are provided in parallel between the first circuit 110 and the second circuit 120. Both ends of each magnetic switch 200 are electrically connected to the first circuit 110 and the second circuit 120, respectively. A resistor 400 is connected in series between each two adjacent magnetic switches 200, and the resistor 400 is provided on the first circuit 110 and / or the second circuit 120, that is, the plurality of resistors 400 can be provided on the first circuit 110 at the same time, can also be provided on the second circuit 120 at the same time, can also be provided on the first circuit 110, and the others can be provided on the second circuit 120, as long as it can be achieved that a resistor 400 is connected in series between each two adjacent magnetic switches 200. The magnetic suspension trigger 300 is suspended on the liquid surface of the liquid to be tested, and can rise and fall with the rise and fall of the liquid surface. When the magnetic suspension trigger 300 rises and falls, the magnetic suspension trigger 300 can trigger the magnetic switch 200 closest to it, so that the magnetic switch 200 changes from an open state to a closed state, and after moving away from the magnetic switch 200, the magnetic switch 200 changes from a closed state to an open state. Specifically, a guide structure extending along the liquid surface rise and fall direction can be provided on one side of the substrate 100. When the guide structure is placed in the liquid to be tested, the liquid to be tested can enter the guide structure. After the magnetic suspension trigger 300 is placed in the guide structure, when the liquid surface rises and falls, the magnetic suspension trigger 300 can also rise and fall accordingly, and limited by the guide structure, the magnetic suspension trigger 300 can be maintained in a distance range that can trigger the magnetic switch 200.

[0019] The sensor has a plurality of magnetic switches 200 arranged in parallel on a substrate 100, and a resistor 400 is connected in series between every two adjacent magnetic switches 200. When the magnetic suspension trigger 300 rises and falls with the rise and fall of the liquid level, the magnetic suspension trigger 300 can trigger the magnetic switch 200 closest to it, so that the magnetic switch 200 changes from an open state to a closed state. At this time, the magnetic switch 200 can electrically conduct the first circuit 110, the second circuit 120 and the resistor 400 connected in series to the loop. When the liquid level changes and the magnetic suspension trigger 300 moves away from the magnetic switch 200, the magnetic switch 200 changes from a closed state to an open state, and the loop is disconnected.

[0020] Therefore, when in use, the sensor can be placed in the liquid to be tested and the sensor can be fixed, and the magnetic suspension trigger 300 can be placed on the side of the substrate 100, and the magnetic suspension trigger 300 can be within the range that can trigger the magnetic switch 200. When the liquid level changes, the height of the magnetic suspension trigger 300 also changes accordingly. As the magnetic suspension trigger 300 follows the liquid level to rise and fall to different heights, the magnetic suspension trigger 300 can trigger the magnetic switches 200 at different heights, so that different numbers of resistors 400 are connected in series to the circuit and turned on, thereby changing the resistance of the circuit. When the liquid level remains unchanged, the height of the magnetic suspension trigger 300 no longer changes, and the resistance of the circuit remains unchanged. Therefore, the position information of the liquid level can be obtained according to the resistance information of the circuit, and the continuous detection of the liquid level height is realized. In addition, the sensor integrates multiple magnetic switches 200 and multiple resistors 400 on a substrate 100, which can not only reduce the size of the sensor, but also facilitate the user to install and use. In addition, the number of magnetic switches 200 may be increased or decreased according to actual needs, and the distribution distance and height of the magnetic switches 200 in the liquid level direction may be changed, thereby adjusting the range of liquid level heights that can be detected by the sensor.

[0021] For example, refer to Figure 1 , at this time, the liquid level is near the second magnetic switch 200 from bottom to top. At this liquid level, the magnetic switch 200 closest to the magnetic suspension trigger 300 is the second one from bottom to top. At this time, the second magnetic switch 200 connects the first circuit 110 with the second circuit 120, and connects a resistor 400 below the second magnetic switch 200 in series to the circuit. At this time, the resistance of the circuit corresponds to a certain value. Conversely, when the liquid level changes and the resistance of the circuit corresponds to this value, it can be known that the liquid level is near the second magnetic switch 200. For another example, referring to Figure 2, at this time, the liquid level rises to the vicinity of the seventh magnetic switch 200 from bottom to top, and the magnetic suspension trigger 300 also rises with the liquid level, and the second magnetic switch 200 will be disconnected. At this liquid level, the magnetic switch 200 closest to the magnetic suspension trigger 300 is the seventh one from bottom to top. The seventh magnetic switch 200 connects the first circuit 110 with the second circuit 120, and connects the six resistors 400 below the seventh magnetic switch 200 in series to the circuit. At this time, the resistance of the circuit also corresponds to a certain value. Conversely, when the liquid level changes, when the resistance of the circuit corresponds to the value, it can be known that the liquid level is near the seventh magnetic switch 200. Similarly, when the liquid level is finally near other magnetic switches 200, the magnetic suspension trigger 300 will trigger the magnetic switch 200 closest to it, and the magnetic switch 200 will connect the first circuit 110 with the second circuit 120, so that the resistance of the circuit changes. Therefore, the height information of the liquid level can be known through the resistance of the circuit, which will not be repeated here.

[0022] Further, the substrate 100 is a PCB board, the first circuit 110 and the second circuit 120 are both circuits printed on the PCB board, the magnetic switch 200 and the resistor 400 can be integrated on the PCB board, and the entire circuit board can be insulated from the outside after packaging, and play a role in moisture and water ingress prevention, and will not be damaged by mechanical impact. Further, the spacing between each two adjacent magnetic switches 200 is equal, and the resistance of the resistor 400 between each two adjacent magnetic switches 200 is equal. Multiple resistors 400 are all located on the same side, that is, multiple resistors 400 are all arranged on the first circuit 110 or on the second circuit 120, so that it is more convenient to establish a relationship curve between the circuit resistance and the liquid level, and then obtain the height information of the liquid level through the relationship curve and the circuit resistance. Further, the magnetic suspension trigger 300 is a magnetic float, the magnetic switch 200 is a reed switch, and terminals 210 are provided at both ends of the magnetic switch 200, which can be welded to the first circuit 110 and the second circuit 120.

[0023] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A liquid level continuous detection sensor, characterized in that: It comprises a substrate (100), a magnetic switch (200), a magnetic suspension trigger (300) and a resistor (400); The substrate (100) is provided with a first circuit (110) and a second circuit (120); a plurality of magnetic switches (200) are arranged in parallel between the first circuit (110) and the second circuit (120); two ends of each magnetic switch (200) are electrically connected to the first circuit (110) and the second circuit (120), respectively; a resistor (400) is connected in series between each two adjacent magnetic switches (200), and the resistor (400) is arranged on the first circuit (110) and / or the second circuit (120); The magnetic suspension trigger (300) is suspended on the liquid surface of the liquid to be measured and can rise and fall with the rise and fall of the liquid surface. The magnetic suspension trigger (300) can trigger the magnetic switch (200) closest to it, so that the magnetic switch (200) changes from an open state to a closed state, and after moving away from the magnetic switch (200), the magnetic switch (200) changes from a closed state to an open state.

2. The liquid level continuous detection sensor according to claim 1, characterized in that: The substrate (100) is a PCB board, and the first circuit (110) and the second circuit (120) are circuits printed on the PCB board.

3. The liquid level continuous detection sensor according to claim 1, characterized in that: The distance between any two adjacent magnetic switches (200) is equal.

4. The liquid level continuous detection sensor according to claim 1, characterized in that: The resistance values ​​of the resistors (400) between every two adjacent magnetic switches (200) are equal.

5. The liquid level continuous detection sensor according to claim 1, characterized in that: The plurality of resistors (400) are located on the same side.

6. The liquid level continuous detection sensor according to claim 1, characterized in that: The magnetic switch (200) is a reed switch.

7. The liquid level continuous detection sensor according to claim 1, characterized in that: The magnetic suspension trigger (300) is a magnetic floating ball.

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