Liquid level detection mechanism and circuit for source bottle

Abstract

The utility model discloses a liquid level detection mechanism and circuit for source bottle, including measuring sensor, connecting circuit board and controller, the connecting circuit board is equipped with conducting circuit layer, a plurality of measuring sensors are equipped on the connecting circuit board and are distributed along the axial direction of connecting circuit board at intervals, the controller is equipped with the conducting circuit layer, and the controller is equipped with the conducting circuit layer. The connecting circuit board is connected with the controller through a circuit, the controller is connected with indicator lamps and a displayer, one measuring sensor corresponds to one indicator lamp, and the connecting circuit board is installed on the clamping plate in the vertical direction, so that the measuring sensors are arranged from top to bottom, and the measuring ends of the measuring sensors penetrate through the side clamping plate. A gap is formed between the connecting circuit board and the clamping plate, the correspondingly-connected indicating lamp is turned off when the measuring sensor makes contact with liquid, and the correspondingly-connected indicating lamp is turned on when the measuring sensor does not make contact with the liquid. The liquid level can be accurately measured in real time, and normal production is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of source bottles, and specifically relates to a liquid level detection mechanism and circuit for a source bottle. Background Art

[0002] A source bottle is a bottle or cabinet of various volume sizes filled with liquid inside. There is a constant-temperature source bottle that is particularly suitable for chemical, biological, and physical laboratories that need to maintain low-temperature and normal-temperature conditions. It is an essential equipment for laboratories in the fields of medicine and health, chemical industry, food industry, metallurgical industry, universities, scientific research, genetic engineering, polymer engineering, etc. The source bottle can be combined with instruments such as a rotary evaporator, a vacuum freeze dryer, a circulating water vacuum pump, and a magnetic stirrer to perform multifunctional chemical reaction operations and drug storage.

[0003] The source bottle is filled with liquid. To be used continuously and effectively, it is necessary to ensure that the liquid in the source bottle has a set amount. However, it is impossible for operators to observe the source bottle continuously for 24 hours, and some of these tanks are not transparent, making it difficult to directly observe the liquid level inside the source bottle. Once the amount of liquid is less, it will affect the actual use effect. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a liquid level detection mechanism for a source bottle.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A liquid level detection mechanism for a source bottle includes a measurement sensor, a connection circuit board, and a controller. The connection circuit board is provided with a conduction circuit layer. A plurality of measurement sensors are provided, and the plurality of measurement sensors are installed on the connection circuit board and are spaced apart along the axial direction of the connection circuit board. The connection circuit board is connected to the controller through a circuit. The controller is connected to an indicator light and a display. One measurement sensor corresponds to one indicator light. The connection circuit board is installed vertically on the clamping plate, so that the plurality of measurement sensors are arranged from top to bottom. The measurement end of the measurement sensor passes through the side clamping plate. There is a gap between the connection circuit board and the clamping plate. When the measurement sensor comes into contact with the liquid, the corresponding connected indicator light goes out. When the measurement sensor does not come into contact with the liquid, the corresponding connected indicator light is turned on. The controller is provided with control buttons.

[0007] As a further improvement, the clamping plate is provided with mounting holes, and the number of mounting holes is the same as the number of measurement sensors. The measurement sensors are inserted into the mounting holes and fixed tightly.

[0008] As a further improvement, the measurement sensor has a conduction pin, and the conduction pin is connected to the conduction circuit layer of the connection circuit board by welding.

[0009] As a further improvement, an alarm is provided inside the controller.

[0010] As a further improvement, there are two connection circuit boards, and the two connection circuit boards are respectively installed on both sides of the clamping plate.

[0011] A circuit for a liquid level detection mechanism of a source bottle includes a control chip, an indicator light, a liquid level sensing circuit module, an alarm, and a display. The indicator light, the liquid level sensing circuit module, the alarm, and the display are respectively connected to the control chip; the liquid level sensing circuit module includes an amplifier and a measurement terminal. The non-inverting input terminal of the amplifier is grounded through a resistor, the inverting input terminal of the amplifier is connected to the input power supply, and the output terminal of the amplifier sends a signal to the control chip. The measurement terminal is connected to the non-inverting input terminal of the amplifier through a resistor.

[0012] As a further improvement, several liquid level sensing circuit modules are provided and are connected in parallel.

[0013] As a further improvement, the inverting input terminal of the amplifier is connected to the output terminal of the input power supply operational amplifier. The output terminal of the input power supply operational amplifier is connected to the inverting input terminal, and the non-inverting input terminal of the input power supply operational amplifier is connected to an external power supply through a resistor.

[0014] Compared with the prior art, the present utility model has the following beneficial technical effects:

[0015] Multiple measurement sensors are used to extend into the box body and contact the liquid to realize the detection of the liquid level inside the source bottle. By setting different positions of high, medium, and low, the detection of each height position is satisfied. The control is directly achieved by pressing a button on the external controller. Through the detected situation, the liquid inside the source bottle can be controlled in a timely manner without affecting normal production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic assembly structure diagram of the present utility model;

[0017] Figure 2 is a schematic diagram of the circuit framework principle of the present utility model;

[0018] Figure 3 is a schematic diagram of the circuit structure of the measurement sensor in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Such as Figure 1As shown in the figure, a liquid level detection mechanism for a source bottle includes a measurement sensor 1, a connection circuit board 2, and a controller 3. The connection circuit board 2 is provided with a conduction circuit layer. A plurality of measurement sensors 1 are provided. The plurality of measurement sensors 1 are installed on the connection circuit board 2 and are spaced apart along the axial direction of the connection circuit board 2. The connection circuit board 2 is connected to the controller 3 through a circuit. The controller 3 is connected to an indicator light and a display 4. One measurement sensor corresponds to one indicator light. The connection circuit board 2 is installed on the clamping plate 5 in the vertical direction, so that the plurality of measurement sensors 1 are arranged from top to bottom. The measurement end of the measurement sensor 1 passes through the side clamping plate 5. There is a gap between the connection circuit board 2 and the clamping plate 5. When the measurement sensor 1 contacts the liquid, the corresponding connected indicator light goes out. When the measurement sensor does not contact the liquid, the corresponding connected indicator light is turned on. A control button 6 is provided on the controller 3. The clamping plate can be a single plate and then assembled to the side wall of the source bottle; or the clamping plate is a side plate of the source bottle. The measurement sensor is a sensor specifically used for measuring liquid. Any type on the market can be used, and there is no specific limitation. The display and the indicator light can be integrated on the controller. The controller forms a control terminal. The control button on the controller can control on / off, etc.

[0023] In this embodiment, three measurement sensors are taken as an example for illustration. In actual use, four, five or other numbers can be set. Correspondingly, three indicator lights are also set. The colors of the three indicator lights can be different, so that the current liquid level situation can be viewed more intuitively. Whichever indicator light goes out indicates that the current liquid level is in the area above the corresponding measurement sensor.

[0024] The clamping plate 5 is provided with mounting holes. The number of mounting holes is the same as the number of measurement sensors 1. The measurement sensors are inserted into the mounting holes and fixed tightly. It can be achieved by interference fit for fastening without the need to cooperate with other tools for fixing. Or an elastic silicone sleeve can be filled in the mounting holes, and the measurement sensors are inserted into the silicone sleeves to achieve fastening, and it is not easy to damage the measurement sensors.

[0025] The measurement sensor has conduction pins. The conduction pins are connected to the conduction circuit layer of the connection circuit board by welding and are fixed on the connection circuit board by welding to ensure the reliability of the assembly, and the measurement sensor is not easy to fall off during use.

[0026] An alarm is provided in the controller. When the liquid level is lower than the lowest line or the set liquid level, an alarm can be realized to remind the staff to take corresponding measures in time.

[0027] Two connection circuit boards are provided. The two connection circuit boards are respectively installed on both sides of the clamping plate, and the detection is more accurate.

[0028] Reference Figures 1-3As shown in the figure, a circuit for a liquid level detection mechanism of a source bottle includes a control chip, an indicator light, a liquid level sensing circuit module, an alarm, and a display. The indicator light, the liquid level sensing circuit module, the alarm, and the display are respectively connected to the control chip. The liquid level sensing circuit module includes an amplifier and a measurement terminal. The non-inverting terminal of the amplifier is grounded through a resistor, the inverting terminal of the amplifier is connected to the input power supply, and the output terminal of the amplifier sends a signal to the control chip. The measurement terminal is connected to the non-inverting terminal of the amplifier through a resistor. The measurement terminal is mainly in contact with the liquid to measure the liquid level. When in contact with the liquid level, the corresponding indicator light goes out at this time. If the measurement terminal is not in contact with the liquid, it means that the liquid is in the area below the current measurement terminal.

[0029] A plurality of the liquid level sensing circuit modules are provided and are connected in parallel.

[0030] The inverting terminal of the amplifier is connected to the output terminal of the input power supply operational amplifier. The output terminal of the input power supply operational amplifier is connected to the inverting terminal. The non-inverting terminal of the input power supply operational amplifier is connected to the external power supply through a resistor.

[0031] In this embodiment, three liquid level sensing circuit modules are set as an example for elaboration.

[0032] They respectively include amplifier UA, measurement terminal J1, amplifier UB, measurement terminal J2, amplifier UC, and measurement terminal J3. The non-inverting terminal of amplifier UA is connected in series with resistors R2 and R3 and then grounded. The inverting terminal of amplifier UA is connected to the input power supply. Measurement terminal J1 is connected in series with resistors R1 and R4 and then grounded. Resistor R1 is connected to resistor R2. The non-inverting terminal of amplifier UB is connected in series with resistors R5 and R6 and then grounded. The inverting terminal of amplifier UB is connected to the input power supply. Measurement terminal J2 is connected in series with resistors R7 and R8 and then grounded. Resistor R7 is connected to resistor R5. The non-inverting terminal of amplifier UC is connected in series with resistors R9 and R10 and then grounded. The inverting terminal of amplifier UC is connected to the input power supply. Measurement terminal J3 is connected in series with resistors R11 and R12 and then grounded. Resistor R11 is connected to resistor R9.

[0033] The input power supply is 1.2V, which is realized through input power supply operational amplifier UD. The output terminal of input power supply operational amplifier UD inputs a 1.2V power supply for the liquid level sensing circuit module to conduct and operate. The inverting terminal of input power supply operational amplifier UD is connected to the output terminal. The non-inverting terminal of input power supply operational amplifier UD is connected to resistor R25, and a capacitor C1 and a resistor R26 are also connected in parallel and then grounded. A 5V power supply is input to the non-inverting terminal of input power supply operational amplifier UD, and after processing, 1.2V is output to maintain stability and ensure the normal operation and detection of the liquid level sensing circuit module.

[0034] The status of the indicator light is displayed on the display, that is, extinguished or lit, which is convenient for observing the current liquid level situation.

[0035] It should be noted that the above is only the preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid level detection mechanism for a source bottle, characterized in that, It includes a measurement sensor, a connection circuit board and a controller. There is a conduction circuit layer in the connection circuit board. A number of measurement sensors are provided. The number of measurement sensors is installed on the connection circuit board and are spaced apart along the axial direction of the connection circuit board. The connection circuit board is connected to the controller through a circuit. The controller is connected to an indicator light and a display. One measurement sensor corresponds to one indicator light. The connection circuit board is installed on the clamping plate in the vertical direction, so that a number of measurement sensors are arranged from top to bottom. The measurement end of the measurement sensor passes through the side clamping plate. There is a gap between the connection circuit board and the clamping plate. When the measurement sensor comes into contact with the liquid, the corresponding connected indicator light goes out. When the measurement sensor does not come into contact with the liquid, the corresponding connected indicator light is turned on. There are control buttons on the controller.

2. The liquid level detection mechanism for the source bottle according to claim 1, wherein There are mounting holes on the clamping plate. The number of mounting holes is the same as the number of measurement sensors. The measurement sensors are inserted into the mounting holes and fixed.

3. The liquid level detection mechanism for the source bottle according to claim 1, characterized in that, There are conduction pins on the measurement sensor. The conduction pins are connected to the conduction circuit layer of the connection circuit board by welding.

4. The liquid level detection mechanism for the source bottle according to claim 1, characterized in that, There is an alarm in the controller.

5. The liquid level detection mechanism for the source bottle according to claim 1, characterized in that, There are two connection circuit boards. The two connection circuit boards are respectively installed on both sides of the clamping plate.

6. A circuit for a liquid level detection mechanism of a source bottle according to any one of claims 1-5, characterized in that, It includes a control chip, an indicator light, a liquid level sensing circuit module, an alarm and a display. The indicator light, the liquid level sensing circuit module, the alarm and the display are respectively connected to the control chip. The liquid level sensing circuit module includes an amplifier and a measurement terminal. The non-inverting input terminal of the amplifier is grounded through a resistor. The inverting input terminal of the amplifier is connected to the input power supply. The output terminal of the amplifier sends a signal to the control chip. The measurement terminal is connected to the non-inverting input terminal of the amplifier through a resistor.

7. The circuit of the liquid level detection mechanism for the source bottle according to claim 6, characterized in that, A number of the liquid level sensing circuit modules are provided and are connected in parallel.

8. The circuit of the liquid level detection mechanism for the source bottle according to claim 6, characterized in that, The inverting input terminal of the amplifier is connected to the output terminal of the input power supply operational amplifier. The output terminal of the input power supply operational amplifier is connected to the inverting input terminal. The non-inverting input terminal of the input power supply operational amplifier is connected to an external power supply through a resistor.

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