Non-contact essential oil liquid sensor control circuit

Abstract

The utility model discloses a non-contact essential oil liquid sensor control circuit, which is characterized in that a main control chip receives a touch signal sensed by a detection unit, controls a first filtering unit to perform filtering processing, and outputs a level signal to pass through a charging and discharging unit; the first switch unit receives a voltage change signal of the charging and discharging unit to change the working state of the amplification unit, and the second switch unit controls the on-off of external power equipment connected with the second switch unit according to the working state of the amplification unit, and transmits the change of the amount of essential oil sensed by the detection unit attached to the essential oil container to the main control chip. The main control chip changes the output level at the output end by analyzing and processing the signal, so that the aim of detecting essential oil type liquid is fulfilled; by charging and discharging the charging and discharging unit and changing the working state of the relay, the single chip microcomputer outputs small current to control external high-power equipment, and the detection unit is arranged on the outer wall of the container to be detected and can be used for real non-contact detection of essential oil type liquid in the closed container.

Description

Technical Field

[0001] The utility model belongs to the technical field of inductor control circuits, and particularly relates to a non-contact inductor control circuit for essential oil liquids. Background Art

[0002] Essential oil refers to the volatile fragrant substances extracted from spice plants or perfume-producing animals. Essential oil has strong volatility and will quickly volatilize once it comes into contact with air. Essential oil needs to be stored in a sealed dark bottle. When the essential oil in the container is used up, it is necessary to timely know the remaining amount of the essential oil in the container for timely replacement. However, when detecting essential oil liquids, most commonly used contact-type inductive detection is adopted, and the detection head needs to be directly in contact with the oil layer to detect the essential oil. Direct contact between the detection head and the liquid will cause corrosion or short circuit, resulting in inaccurate liquid level detection and affecting the convenient use of essential oil. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a non-contact inductor control circuit for essential oil liquids. The detection unit is installed on the outer wall of the container to be measured, and the change of essential oil is used to sense whether there is essential oil liquid, realizing the true non-contact detection of essential oil liquids in a sealed container, so as to solve the problems put forward in the above background art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a non-contact inductor control circuit for essential oil liquids, which includes a control module, a voltage stabilization module and a detection module. The control module, the voltage stabilization module and the detection module are connected. The control module includes a detection unit, a main control chip, a first filtering unit and a first connection unit. The detection unit, the first filtering unit, the first connection unit are connected to the main control chip. The first connection unit is connected to the first filtering unit. The voltage stabilization module is used to supply power to the control module and the detection module;

[0006] The detection module includes a second connection unit, a charge and discharge unit, a first switch unit, an amplification unit and a second switch unit connected to the first connection unit. The charge and discharge unit and the first switch unit are connected to the second connection unit. The amplification unit is connected to the first switch unit. The second switch unit is connected to the amplification unit. The detection unit is arranged on the outer wall of the container to be measured;

[0007] Among them, the main control chip receives the essential oil liquid touch signal sensed by the detection unit in the container to be measured, controls the first filtering unit to perform filtering processing, and outputs a level signal to the first connection unit. The second connection unit receives the level signal and passes it through the charge and discharge unit. The first switch unit receives the voltage change signal of the charge and discharge unit to change the working state of the amplification unit. The second switch unit controls the opening and closing of an external power device connected to the second switch unit according to the working state of the amplification unit.

[0008] As a further improvement of the above technical solution, the voltage stabilization module includes a protection unit, a second filtering unit, a voltage stabilization power supply chip, and a third filtering unit. The protection unit is connected to the second filtering unit, and the third filtering unit is connected to the voltage stabilization power supply chip. The protection unit is used for circuit protection of the input high voltage, and the second filtering unit and the third filtering unit respectively perform filtering processing on the input high voltage and the input low voltage.

[0009] As a further improvement of the above technical solution, the voltage stabilization power supply chip includes a chip U2 of model AMS1117, and the protection unit includes a fuse F1 with a rated current of 0.5A.

[0010] As a further improvement of the above technical solution, the second filtering unit includes a parallel connection of capacitor C3 and capacitor C4, and the third filtering unit includes a parallel connection of capacitor C5 and capacitor C6.

[0011] As a further improvement of the above technical solution, the charge and discharge unit is capacitor C7, the amplification unit is triode Q1, the first switch unit is field effect transistor Q2, the second switch unit is relay K1, the main control chip includes a chip U1 of model BS83B04C, and the first filtering unit includes a parallel connection of capacitor C1 and capacitor C2.

[0012] As a further improvement of the above technical solution, one end of capacitor C7 is connected to resistor R3 and the gate of field effect transistor Q2, the other end of capacitor C7 is connected to resistor R2 and the source of field effect transistor Q2, resistor R2 and resistor R3 are connected to one end of resistor R1, the other end of resistor R1 is connected to the second connection unit, the drain of field effect transistor Q2 is connected to one end of resistor R4, the other end of resistor R4 is connected to the base of triode Q1, and the emitter of triode Q1 is connected to resistor R5.

[0013] As a further improvement of the above technical solution, the detection module further includes an indication unit and a diode D4. The indication unit includes a resistor R6 and an LED lamp. The cathode of the diode D4 and one end of the resistor R6 are connected to the collector of the triode Q1. The other end of the resistor R6 is connected to the LED lamp, and the anode of the diode D4 is grounded.

[0014] As a further improvement of the above technical solution, the indication unit is connected in parallel with the relay K1. The relay K1 includes a NO terminal, an NC terminal, and a Common terminal.

[0015] As a further improvement of the above technical solution, when the change amount of the touch signal sensed by the detection unit exceeds a preset threshold, the IO output terminal of the main control chip changes from a low level to a high level. The output high level charges the capacitor C7 through the first connection unit, the second connection unit, and the resistors R1 and R3.

[0016] When the voltage of the capacitor C7 rises to 1.2V, the conductive channel of the field effect transistor Q2 is opened, the resistor R4 is grounded through the field effect transistor Q2, the base voltage of the triode Q1 changes to turn on the triode Q1, and one path of the voltage stabilization module supplies power to the LED lamp through the triode Q1 and the resistor R6 to light up the LED lamp.

[0017] As a further improvement of the above technical solution, the other path of the voltage stabilization module supplies power to the coil of the relay K1. The coil is energized to generate a magnetic field to attract and close to realize the change of essential oil and control an external power device.

[0018] When the essential oil liquid in the container changes from having to having none, the IO output terminal of the main control chip changes from a high level to a low level. The capacitor C7 discharges through the resistor R2 or the resistor R3, the field effect transistor Q2 is turned off, the triode Q1 is turned off, and the coil of the relay K1 loses power and disconnects to turn off the external power device.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] By setting up a control module, a voltage stabilization module and a detection module, the main control chip receives the essential oil liquid touch signal sensed by the detection unit in the container to be measured, controls the first filtering unit for filtering processing, and outputs a level signal to the first connection unit. The second connection unit receives the level signal and passes through the charge and discharge unit. The first switch unit receives the voltage change signal of the charge and discharge unit to change the working state of the amplification unit. The second switch unit controls the opening and closing of the external power device connected to the second switch unit according to the working state of the amplification unit, transmits the change in the amount of essential oil sensed by the detection unit attached to the essential oil container to the main control chip, and the main control chip changes the output level at the output end through signal analysis and processing, so as to achieve the purpose of detecting essential oil-like liquids; by charging and discharging the charge and discharge unit and changing the working state of the relay, it is realized that the single-chip microcomputer outputs a small current to control the external high-power device. The detection unit is arranged on the outer wall of the container to be measured, and can truly non-contact detect the essential oil-like liquid in the sealed container. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a structural block diagram of a non-contact essential oil-like liquid sensor control circuit proposed by the present invention;

[0022] Figure 2 FIG. is a circuit diagram of the control module proposed by the present invention;

[0023] Figure 3 FIG. is a circuit diagram of the voltage stabilization module proposed by the present invention;

[0024] Figure 4 FIG. is a circuit diagram of the detection module proposed by the present invention.

[0025] The main component symbols are explained as follows:

[0026] 100 - Control module; 110 - Detection unit; 120 - Main control chip; 130 - First filtering unit; 140 - First connection unit; 200 - Voltage stabilization module; 210 - Protection unit; 220 - Second filtering unit; 230 - Voltage stabilization power supply chip; 240 - Third filtering unit; 300 - Detection module; 310 - Second connection unit; 320 - Charge and discharge unit; 330 - First switch unit; 340 - Amplification unit; 350 - Second switch unit; 360 - Indication unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation to the present utility model.

[0029] Referring to Figure 1 and Figure 2 , the present utility model provides a non-contact essential oil liquid sensor control circuit, which includes a control module 100, a voltage stabilizing module 200 and a detection module 300. The control module 100, the voltage stabilizing module 200 are connected to the detection module 300. The control module 100 includes a detection unit 110, a main control chip 120, a first filtering unit 130 and a first connection unit 140. The detection unit 110, the first filtering unit 130, the first connection unit 140 are connected to the main control chip 120. The first connection unit 140 is connected to the first filtering unit 130. The voltage stabilizing module 200 is used to supply power to the control module 100 and the detection module 300;

[0030] The detection module 300 includes a second connection unit 310 connected to the first connection unit 140, a charge and discharge unit 320, a first switch unit 330, an amplification unit 340 and a second switch unit 350. The charge and discharge unit 320 and the first switch unit 330 are connected to the second connection unit 310. The amplification unit 340 is connected to the first switch unit 330. The second switch unit 350 is connected to the amplification unit 340. The detection unit 110 is arranged on the outer wall of the container to be measured;

[0031] Wherein, the main control chip 120 receives the touch signal of the essential oil liquid in the container to be measured sensed by the detection unit 110, controls the first filtering unit 130 to perform filtering processing and outputs a level signal to the first connection unit 140. The second connection unit 310 receives the level signal and passes through the charge and discharge unit 320. The first switch unit 330 receives the voltage change signal of the charge and discharge unit 320 and changes the working state of the amplification unit 340. The second switch unit 350 controls the opening and closing of an external power device connected to the second switch unit 350 according to the working state of the amplification unit 340.

[0032] Referring to Figure 3 and Figure 4, in this embodiment, the voltage stabilization module 200 includes a protection unit 210, a second filtering unit 220, a voltage stabilization power chip 230, and a third filtering unit 240. The protection unit 210, the second filtering unit 220, and the third filtering unit 240 are connected to the voltage stabilization power chip 230. The protection unit 210 is used for circuit protection of the input high voltage, and the second filtering unit 220 and the third filtering unit 240 respectively perform filtering processing on the input high voltage and the input low voltage. The voltage stabilization power chip 230 includes a chip U2 with the model AMS1117. The protection unit 210 includes a fuse with the model F1, and the rated current is 0.5A, which can achieve circuit surge protection. The detection unit 110 is a detection piece or a detector installed on the outer wall of the container to be measured, and the installation method can be pasting, adsorption, etc. The main control chip 120 is a single-chip microcomputer with a touch-type Flash. This single-chip microcomputer has a Flash with an eight-bit high-performance reduced instruction set and has a fully integrated touch button function. The touch function is fully integrated inside the single-chip microcomputer without external components. The single-chip microcomputer includes features such as an internal watchdog timer and low-voltage reset, as well as additional anti-interference and ESD protection performance, ensuring that the single-chip microcomputer operates reliably in a harsh electromagnetic interference environment, with a wide range of applications and strong sensing ability. It can penetrate and detect the essential oil liquid in containers made of various non-metallic materials, such as plastic, glass, ceramic, etc. And it controls the external power equipment through the subsequent circuit. The first connection unit 140 is denoted as J1, and the second connection unit 310 is denoted as J2.

[0033] It should be noted that when the detection piece is placed on the outer wall of the essential oil container and connected to the IO interface of the touch-type Flash single-chip microcomputer BS83B04C, when the amount of essential oil in the container changes and the change amount reaches the set value, the detection piece attached to the essential oil container senses the change in the amount of essential oil and transmits it to the single-chip microcomputer BS83B04C. The single-chip microcomputer analyzes and processes the signal and changes the output level at the output end, so as to achieve the purpose of detecting essential oil-like liquids. The change in the output level changes the charging and discharging of the charging and discharging unit 320 to change the working state of the second switch unit 350, that is, the relay, so as to achieve the purpose of controlling the external high-power equipment with a small current output by the single-chip microcomputer. The protection unit 210 and the filtering unit in the voltage stabilization module 200 can improve the anti-interference performance of the circuit and ensure the reliable operation of the detection unit 110 and the relay in a harsh environment. Among them, the container to be measured is a non-metallic container such as plastic, glass, ceramic, etc. By detecting the signal penetrating the non-metallic container and detecting the liquid by sensing the outer wall of the container, without direct contact with the essential oil liquid, the detection unit will not be affected by the corrosion of the oil and damage the detection, and it can complete the detection of whether there is essential oil liquid inside the container outside the container. The detection of the essential oil liquid level is accurate and stable. The non-mechanical working mode of the electronic circuit structure has the characteristics of stable performance and long continuous service life.

[0034] Specifically, the second filtering unit 220 includes a capacitor C3 and a capacitor C4 connected in parallel, and the third filtering unit 240 includes a capacitor C5 and a capacitor C6 connected in parallel. One end of the capacitor C7 is connected to the gate of the resistor R3 and the field effect transistor Q2, and the other end of the capacitor C7 is connected to the source of the resistor R2 and the field effect transistor Q2. The resistor R2 and the resistor R3 are connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the second connection unit 310. The drain of the field effect transistor Q2 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the base of the triode Q1. The emitter of the triode Q1 is connected to the resistor R5. The charge and discharge unit 320 is the capacitor C7, the amplification unit 340 is the triode Q1, the first switch unit 330 is the field effect transistor Q2, the second switch unit 350 is the relay K1, the main control chip 120 includes a chip U1 of the model BS83B04C, and the first filtering unit 130 includes a capacitor C1 and a capacitor C2 connected in parallel.

[0035] It should be understood that the main control chip 120 receives the touch signal sensed by the detection unit 110, controls the filtering process of the first filtering unit 130, and outputs a level signal to the first connection unit 140. The second connection unit 310 receives the level signal and passes through the charge and discharge unit 320. The first switch unit 330 receives the voltage change signal of the charge and discharge unit 320 and changes the working state of the amplification unit 340. The second switch unit 350 controls the opening and closing of the external power device connected to the second switch unit 350 according to the working state of the amplification unit 340, transmits the change in the amount of essential oil sensed by the detection unit attached to the essential oil container to the main control chip, and the main control chip changes the output level at the output end through signal analysis and processing, so as to achieve the purpose of detecting essential oil-like liquids; by charging and discharging the charge and discharge unit 320 and changing the working state of the relay, the single-chip microcomputer outputs a small current to control the external high-power device. The detection unit 110 is arranged on the outer wall of the container to be measured, and can perform a truly non-contact detection of the essential oil-like liquid in the sealed container.

[0036] Optionally, the detection module 300 further includes an indication unit 360 and a diode D4. The indication unit 360 includes a resistor R6 and an LED lamp. The cathode of the diode D4 and one end of the resistor R6 are connected to the collector of the triode Q1, the other end of the resistor R6 is connected to the LED lamp, and the anode of the diode D4 is grounded.

[0037] In this embodiment, the indicating unit 360 is connected in parallel with the relay K1. The relay K1 includes a NO terminal, a NC terminal, and a Common terminal. LEDs can include Orange corresponding to the NO terminal, Purple corresponding to the NC terminal, and Grey corresponding to the Common terminal. NO means Normally Open, that is, it is open in the non-powered state and closed under the action of the electromagnetic coil (sucked in) after being powered on; NC means Normally Closed, that is, it is closed in the non-powered state and open under the action of the electromagnetic coil (sucked in) after being powered on; Common means the common terminal. The working process of the relay is as follows: If the NC terminal and the Common terminal are connected, the circuit is in a closed and conductive state when the switch is not triggered; after the switch is triggered, the circuit is not conductive. If the NO terminal and the Common terminal are connected, the circuit is not conductive when the switch is not triggered; after the switch is triggered, the circuit is conductive.

[0038] Optionally, when the detection unit 110 senses that the change amount of the touch signal exceeds a preset threshold, the IO output terminal of the main control chip 120 changes from a low level to a high level, and the output high level charges the capacitor C7 through the first connection unit 140, the second connection unit 310, via the resistor R1 and the resistor R3.

[0039] When the voltage of the capacitor C7 rises to 1.2V, the conductive channel of the field effect transistor Q2 is opened, the resistor R4 is grounded through the field effect transistor Q2, the base voltage of the triode Q1 changes to make the triode Q1 conduct, and one path of the voltage stabilizing module supplies power to the LED lamp through the triode Q1 and the resistor R6 to light up the LED lamp.

[0040] In this embodiment, another path of the voltage stabilizing module 200 supplies power to the coil of the relay K1. The coil is energized to generate a magnetic field to suck in, so as to realize the change of essential oil and control an external power device; when the essential oil liquid in the container changes from having to none, the IO output terminal of the main control chip 120 changes from a high level to a low level, the capacitor C7 discharges through the resistor R2 or the resistor R3, the field effect transistor Q2 is cut off, the triode Q1 is cut off, and the coil of the relay K1 loses power and disconnects to turn off the external power device.

[0041] It should be noted that the change induction of essential oil is used to detect the presence of essential oil liquid. When the essential oil liquid in the container changes from non-existent to existent, the detection piece will sense the tiny change of touch and connect to the IO interface of the single-chip microcomputer BS83B04C. The chip analyzes the tiny signal and eliminates interference. When this change amount exceeds a certain threshold, it is considered that the liquid level reaches the induction point, and the output of the IO of the single-chip microcomputer changes from low level to high level. The output high level charges the capacitor C7 through the first connection unit 140, the second connection unit 310, that is, the connection terminal, and the resistors R1 and R3. When the capacitor voltage rises to 1.2V, the conductive channel of the field-effect transistor Q2 is opened, and the resistor R4 is grounded through Q2, thereby changing the base voltage of the triode Q1, and the triode Q1 conducts. The VCC-24V power supply of the voltage stabilization module passes through the triode Q1. One way supplies power to the LED lamp through the current-limiting resistor R6 to light up the LED lamp; the other way supplies power to the coil of the relay K1, and the coil is energized to generate a magnetic field to attract, so as to achieve the purpose of controlling external power equipment due to the change of essential oil. On the contrary, when the essential oil liquid in the container changes from existent to non-existent, the output of the IO of the single-chip microcomputer changes from high level to low level, the capacitor C7 discharges through the resistors R2 / R3, the field-effect transistor Q2 is cut off, the triode Q1 is cut off, and the coil of the relay K1 loses power and disconnects, thereby turning off the external power equipment.

[0042] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A non-contact essential oil liquid sensor control circuit, characterized in that: It includes a control module, a voltage stabilizing module and a detection module, wherein the control module and the voltage stabilizing module are connected with the detection module, the control module includes a detection unit, a main control chip, a first filtering unit and a first connecting unit, the detection unit, the first filtering unit and the first connecting unit are connected with the main control chip, the first connecting unit is connected with the first filtering unit, and the voltage stabilizing module is used to supply power to the control module and the detection module; The detection module includes a second connection unit connected to the first connection unit, a charge and discharge unit, a first switch unit, an amplification unit, and a second switch unit, wherein the charge and discharge unit and the first switch unit are connected to the second connection unit, the amplification unit is connected to the first switch unit, and the second switch unit is connected to the amplification unit, and the detection unit is arranged on the outer wall of the container to be detected; The main control chip receives the touch signal of the essential oil liquid in the container to be tested sensed by the detection unit, controls the first filter unit to filter and process, and outputs a level signal to the first connection unit, the second connection unit receives the level signal through the charge and discharge unit, the first switch unit receives the voltage change signal of the charge and discharge unit to change the working state of the amplification unit, and the second switch unit controls the opening and closing of the external power device connected to the second switch unit according to the working state of the amplification unit; The charging and discharging unit is a capacitor C7, the amplifying unit is a transistor Q1, the first switching unit is a field effect transistor Q2, the second switching unit is a relay K1, the main control chip includes a chip U1 of model BS83B04C, and the first filtering unit includes a capacitor C1 and a capacitor C2 connected in parallel; The detection module also includes an indication unit and a diode D4, the indication unit includes a resistor R6 and an LED lamp, the cathode of the diode D4 and one end of the resistor R6 are connected to the collector of the transistor Q1, the other end of the resistor R6 is connected to the LED lamp, and the anode of the diode D4 is grounded; When the detection unit senses that the change in the touch signal exceeds a preset threshold, the IO output terminal of the main control chip changes from a low level to a high level, and the high level output is charged to the capacitor C7 through the first connection unit and the second connection unit through the resistor R1 and the resistor R3; When the voltage of the capacitor C7 rises to 1.2V, the conductive channel of the field effect transistor Q2 is opened, the resistor R4 is grounded through the field effect transistor Q2, the base voltage of the transistor Q1 changes to turn on the transistor Q1, and one path of the voltage stabilizing module supplies power to the LED lamp through the transistor Q1 and the resistor R6 to light up the LED lamp; Another circuit of the voltage regulator module supplies power to the coil of relay K1, which generates a magnetic field to attract the essential oil and control the external power device. When the essential oil liquid in the container changes from presence to absence, the IO output terminal of the main control chip changes from high level to low level, the capacitor C7 discharges through the resistor R2 or the resistor R3, the field effect transistor Q2 is turned off, the transistor Q1 is turned off, and the coil of the relay K1 loses power and disconnects to turn off the external power device.

2. The non-contact essential oil liquid sensor control circuit according to claim 1, characterized in that: The voltage stabilizing module includes a protection unit, a second filtering unit, a voltage stabilizing power supply chip and a third filtering unit. The protection unit and the second filtering unit are connected, and the third filtering unit is connected to the voltage stabilizing power supply chip. The protection unit is used to perform circuit protection on the input high voltage, and the second filtering unit and the third filtering unit filter the input high voltage and the input low voltage respectively.

3. The non-contact essential oil liquid sensor control circuit according to claim 2, characterized in that: The voltage-stabilized power supply chip includes a chip U2 of model AMS1117, and the protection unit includes a fuse of model F1 with a rated current of 0.5A.

4. The non-contact essential oil liquid sensor control circuit according to claim 2, characterized in that: The second filtering unit includes a capacitor C3 and a capacitor C4 connected in parallel, and the third filtering unit includes a capacitor C5 and a capacitor C6 connected in parallel.

5. The non-contact essential oil liquid sensor control circuit according to claim 1, characterized in that: One end of the capacitor C7 is connected to the resistor R3 and the gate of the field effect transistor Q2, the other end of the capacitor C7 is connected to the resistor R2 and the source of the field effect transistor Q2, the resistor R2 and the resistor R3 are connected to one end of the resistor R1, the other end of the resistor R1 is connected to the second connection unit, the drain of the field effect transistor Q2 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected to the resistor R5.

6. The non-contact essential oil liquid sensor control circuit according to claim 1, characterized in that: The indicating unit is connected in parallel with the relay K1, and the relay K1 includes a NO terminal, a NC terminal and a Common terminal.

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