Water level alarm is used in teaching
The utility model relates to an alarm correlation technique field specifically is a water level alarm is used in teaching.
The water level alarm has various types, corresponding to different products in different methods, generally refers to alarm the water level by a mechanical or magnetic induction method, the start or stop of equipment such as a water pump and the like can be controlled by an audible and visual alarm or a magnetic alarm, the electronic water level switch adopts the principle that the water level is detected by an electronic probe, and then a chip special for detecting the water level processes the detected signal, when the liquid to be measured reaches the action point, it outputs high or low level signal, and then cooperates with the water level controller to output relay switch signal, or directly supplies power to the alarm, thereby realizing the alarm function of the liquid level, the existing water level alarm, no matter the alarm is ultra-low water level alarm/ultra-high water level alarm or floating ball water level alarm, the circuit structure is complex, the power is supplied by 220V high-voltage electricity, certain danger exists, and the device is not suitable for students to learn and make and to be familiar with the principle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water level alarm is used in teaching to solve the current water level alarm who proposes in the above-mentioned background art, no matter be ultralow water level warning/super high water level warning or floater water level warning, its circuit structure is complicated, uses the power supply of 220v high-tension electricity, has certain danger, and unsuitable student learns the problem of making and being familiar with its principle of doing the hand.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a water level alarm is used in teaching, includes the bottom plate, upper surface one side fixedly connected with battery case of bottom plate, the one end fixedly connected with self-locking switch of battery case, the upper surface of bottom plate corresponds one side fixedly connected with bee calling organ of battery case, the first metal copper foil piece of upper surface opposite side fixedly connected with of bottom plate, the upper surface of bottom plate corresponds one side fixedly connected with second metal copper foil piece of first metal copper foil piece.
Preferably, the first metallic copper foil and the second metallic copper foil are separated by 10 mm.
Preferably, the lengths of the first metal copper foil and the second metal copper foil are the same, and the lengths of the first metal copper foil and the second metal copper foil are both two thirds of the length of the bottom plate.
Preferably, the bottom plate is made of an insulator such as a wood plate, an acrylic plate, and a plastic plate.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses, through the battery case, the self-locking switch, bee calling organ, the use of mutually supporting of first metal copper foil piece and second metal copper foil piece, it is the conductor to utilize water, along with the rising of water level, the water yield increases, resistance between first metal copper foil piece and the second metal copper foil piece diminishes, the electric current grow in the circuit, the sound grow that makes bee calling organ send, it is more accurate to detect, be difficult for receiving the influence, the accurate nature of warning has been improved, adopt No. 5 battery powered, guarantee personal safety, circuit structure has been optimized, make it simple and easy to understand, small, moreover, the steam generator is simple in structure, can make at any time and be used for daily, be familiar with its principle.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the circuit frame structure of the present invention.
In the figure: 1. a battery case; 2. a self-locking switch; 3. a buzzer; 4. a first metallic copper foil; 5. a second copper foil; 6. a base plate.
In order to solve current water level alarm, no matter be the warning of ultralow water level/super high water level or the warning of floater water level, its circuit structure is simple, avoids using the power supply of 220v high-tension electricity, avoids having certain danger, is fit for the student to learn to make and be familiar with its principle by hand, the embodiment of the utility model provides a water level alarm is used in the teaching. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment provides a water level alarm for teaching, which includes a bottom plate 6, a battery box 1 is fixedly connected to one side of the upper surface of the bottom plate 6, two batteries of five size are installed inside the battery box 1, a self-locking switch 2 is fixedly connected to one end of the battery box 1, a buzzer 3 is fixedly connected to one side of the bottom plate 6 corresponding to the battery box 1, the buzzer 3 is electrically connected to the battery box 1, a first metal copper foil 4 is fixedly connected to the other side of the upper surface of the bottom plate 6, and a second metal copper foil 5 is fixedly connected to one side of the upper surface of the bottom plate 6 corresponding to the first metal copper foil 4.
In the embodiment, when the water level detection device is used, first, a first metal copper foil 4 and a second metal copper foil 5 are fixed on a bottom plate 6, then, a buzzer 3 and a battery box 1 are fixed on the bottom plate 6, a self-locking switch 2 is fixed on the battery box 1, two No. 5 batteries are placed in the battery box 1 to provide 3V direct current for the batteries, the first metal copper foil 4, the second metal copper foil 5, the buzzer 3, the battery box 1 and the self-locking switch 2 are connected into a series circuit through conducting wires, the on-off of the whole circuit is controlled through the self-locking switch 2, the first metal copper foil 4 and the second metal copper foil 5 are inserted into water to be detected, as the water level rises, the more copper foils immersed in the water, the buzzer 3 makes a sound, the higher the water level is, the louder the sound is, the water is a conductor, as the water level rises, the water amount increases, the resistance between the first metal copper foil 4 and the second metal copper foil, the current in the circuit becomes larger, the sound emitted by the buzzer 3 becomes larger, and the water level of the user is reminded to rise.
Referring to fig. 1, a further improvement is made on the basis of embodiment 1: first metal copper foil 4 with be separated by 10mm between the second metal copper foil 5, can effectually avoid first metal copper foil 4 with take place the contact between the second metal copper foil 5, avoid taking place the false alarm, first metal copper foil 4 with the length of second metal copper foil 5 is unanimous, just first metal copper foil 4 with the length of second metal copper foil 5 is two-thirds of bottom plate 6 is convenient for detect the height of water level, has improved detection range, bottom plate 6 is made by insulators such as plank, ya keli board and plastic slab, can effectually insulate, avoids the circuit to concatenate and appears the wrong report.
In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, it should be further noted that, unless explicitly fixed or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connection, detachable connection, or integral connection, mechanical connection, electrical connection, direct connection, connection through an intermediate medium, and communication between the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.