Water level height detection sensor and closestool

Abstract

The utility model discloses a water level height detection sensor and a closestool, and relates to the technical field of bathroom accessories, the water level height detection sensor comprises a first induction bonding pad, a second induction bonding pad, a third induction bonding pad and a control circuit; the first induction bonding pad, the second induction bonding pad and the third induction bonding pad are sequentially arranged on the outer side of the target container from bottom to top, the first induction bonding pad is arranged at the lowest water level of the target container, and the third induction bonding pad is arranged at the highest water level of the target container. The second induction bonding pad extends from the lowest water level of the target container to the highest water level of the target container; the control circuit is arranged on the outer side of the target container and connected with the first induction bonding pad, the second induction bonding pad and the third induction bonding pad. By adopting the embodiment of the utility model, the water level in the non-metal container can be continuously detected, the structure is simple, and the accuracy is high.

Description

Technical Field

[0001] This utility model relates to the field of sanitary ware technology, and in particular to a water level detection sensor and a toilet. Background Technology

[0002] With social development and technological advancements, water level and volume detection in the sanitary ware industry is becoming increasingly common. Existing container water level sensors typically employ technologies such as single-point capacitive detection, multi-point capacitive detection, float-based magnetic induction detection, and ultrasonic detection. Specifically:

[0003] I. Single-point capacitive water level detection scheme can only detect whether the water level has reached a set fixed height, and cannot detect the continuous height of the water level;

[0004] Second, the multi-point capacitive water level detection scheme requires the setting of multiple capacitive sensing blocks. For example, Chinese patent CN207502025U discloses a capacitive water level monitoring device, which requires the setting of multiple capacitive sensing blocks. Each capacitive sensing block corresponds to a water level height detection point, but it still cannot continuously detect the water level height.

[0005] Third, the float magnetic induction detection solution requires the float to be submerged in water, which affects water quality over time, and the structure and installation are complicated.

[0006] Fourth, ultrasonic testing solutions have high requirements for structural design and are costly.

[0007] Therefore, developing a water level height detection sensor with a simple structure that can continuously detect water levels has become an urgent problem to be solved. Utility Model Content

[0008] The technical problem to be solved by this utility model embodiment is to provide a water level detection sensor and toilet, which can realize continuous detection of water level in non-metallic containers, with simple structure and high accuracy.

[0009] To address the aforementioned technical problems, this utility model provides a water level detection sensor, comprising: a first induction pad, a second induction pad, a third induction pad, and a control circuit; the first, second, and third induction pads are sequentially disposed on the outer side of a target container from bottom to top, with the first induction pad located at the lowest water level of the target container, the third induction pad located at the highest water level of the target container, and the second induction pad extending from the lowest water level of the target container to the highest water level of the target container; the control circuit is located on the outer side of the target container and is connected to the first, second, and third induction pads respectively.

[0010] As an improvement to the above scheme, the first induction pad, the second induction pad, and the third induction pad are located on the same straight line.

[0011] As an improvement to the above solution, the second induction pad is a strip structure, with the top end of the second induction pad connected to the third induction pad and the bottom end of the second induction pad connected to the first induction pad.

[0012] As an improvement to the above solution, the control circuit includes a main control chip, a power supply circuit, a debugging sub-circuit, a signal input sub-circuit, and a communication sub-circuit. The power supply circuit is connected to the main control chip and is used to supply power to the main control chip. The signal input sub-circuit is connected to the main control chip and is used to collect the capacitance information of the first, second, and third induction pads in real time and send the capacitance information to the main control chip. The debugging sub-circuit is connected to the main control chip and is used to program the main control chip so that the main control chip generates water level information based on the capacitance information. The communication sub-circuit is connected to the main control chip and is used for communication between the main control chip and an external terminal.

[0013] As an improvement to the above solution, the power supply circuit includes a first capacitor, a second capacitor, and a third capacitor; the power supply pin of the main control chip is connected to the power supply, the register pin of the main control chip is grounded through the third capacitor, and the operating voltage pin of the main control chip is grounded; one end of the first capacitor is connected to the power supply, and the other end is grounded, and the first capacitor and the second capacitor are connected in parallel.

[0014] As an improvement to the above solution, the signal input sub-circuit includes a first resistor, a second resistor, and a third resistor; the first signal input pin of the main control chip is connected to the first induction pad through the first resistor, the second signal input pin of the main control chip is connected to the second induction pad through the second resistor, and the third signal input pin of the main control chip is connected to the third induction pad through the third resistor.

[0015] As an improvement to the above solution, the communication sub-circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a power supply communication interface; one end of the fourth resistor is connected to the receive pin of the main control chip, and the other end is connected to the power supply communication interface; one end of the fifth resistor is connected to the transmit pin of the main control chip, and the other end is connected to the power supply communication interface; one end of the sixth resistor is grounded through the fourth capacitor, and the other end is grounded through the fifth capacitor and connected to the other end of the fourth resistor; one end of the seventh resistor is grounded through the fourth capacitor, and the other end is grounded through the sixth capacitor and connected to the other end of the fifth resistor.

[0016] On the other hand, this utility model embodiment also provides a toilet, including a water tank, a toilet body, and the aforementioned water level detection sensor; the first induction pad, the second induction pad, and the third induction pad are sequentially arranged from bottom to top on the outside of the water tank, the first induction pad is located at the lowest water level of the water tank, the third induction pad is located at the highest water level of the water tank, and the second induction pad extends from the lowest water level of the water tank to the highest water level of the target container; the control circuit is located on the outside of the water tank and is connected to the first induction pad, the second induction pad, and the third induction pad respectively.

[0017] Implementing the embodiments of this utility model has the following beneficial effects:

[0018] This utility model water level height detection sensor introduces a first induction pad, a second induction pad, and a third induction pad. By setting the first induction pad, the second induction pad, and the third induction pad at different heights, and utilizing the principle of induction capacitance formed by the induction pad and water, it achieves initial water level detection, maximum water level detection, and real-time water level detection with high accuracy.

[0019] Furthermore, the second sensing pad in the water level height detection sensor of this utility model is elongated, which enables continuous water level detection and overcomes the limitation of capacitive sensing, which can only perform single-point detection. At the same time, the water level height detection sensor of this utility model introduces a simple control circuit, which can reduce production costs while effectively realizing water level detection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of an embodiment of the water level height detection sensor of this utility model;

[0021] Figure 2 This is a schematic diagram of an embodiment of the water level detection sensor of this utility model;

[0022] Figure 3 This is a schematic diagram of the first embodiment of the control circuit in the water level height detection sensor of this utility model;

[0023] Figure 4 This is a circuit diagram of the first embodiment of the control circuit in the water level height detection sensor of this utility model;

[0024] Figure 5 This is a schematic diagram of the second embodiment of the control circuit in the water level height detection sensor of this utility model;

[0025] Figure 6 This is a circuit diagram of the second embodiment of the control circuit in the water level height detection sensor of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0027] See Figure 1 and Figure 2 , Figure 1 and Figure 2 The diagram illustrates the specific structure of an embodiment of the water level detection sensor 100 of this utility model, which includes a first sensing pad K1, a second sensing pad K2, a third sensing pad K3, and a control circuit 1; the first sensing pad K1, the second sensing pad K2, and the third sensing pad K3 are sequentially arranged from bottom to top on the outer side of the target container 101, wherein:

[0028] The first induction pad K1 is located at the lowest water level of the target container 101 to realize the detection of the lowest water level (i.e., the initial water level);

[0029] The third induction pad K3 is located at the highest water level of the target container 101 to achieve the detection of the highest water level.

[0030] The second induction pad K2 extends from the lowest water level of the target container 101 to the highest water level of the target container 101, and is used to realize water level height detection.

[0031] The control circuit 1 is located on the outside of the target container 101 and is connected to the first induction pad K1, the second induction pad 2 and the third induction pad K3 respectively.

[0032] It should be noted that the water level detection sensor of this utility model can be applied to a non-metallic target container 101. The control circuit 1, the first induction pad K1, the second induction pad K2 and the third induction pad K3 are all fixedly installed on the outside of the non-metallic target container 101, and the water level detection is realized by utilizing the principle of induction capacitance formed by the induction pad and the water.

[0033] The specific principle of the sensing capacitor is as follows: when the water level rises higher in the target container 101, the overlapping area (effective sensing area) between the water and the second sensing pad K2 is larger, and the parasitic capacitance corresponding to the second sensing pad K2 changes more significantly than the initial value. Therefore, by calibrating and standardizing the change value of the parasitic capacitance corresponding to the second sensing pad K2, the water level in the target container 101 can be detected in real time.

[0034] During operation, when the water level in the target container 101 reaches the position of the first sensing pad K1, the first sensing pad K1 is triggered. At this time, the initial sensing capacitance information of the second sensing pad K2 is detected and recorded. As the water level in the target container 101 continues to increase, the real-time sensing capacitance information of the second sensing pad K2 will also continue to increase. When the water level reaches the position of the third sensing pad K3, the water level has exceeded the detectable range, and at this time, the real-time sensing capacitance information of the second sensing pad K2 also reaches its maximum.

[0035] like Figure 2 As shown, in this embodiment, the first induction pad K1, the second induction pad K2, and the third induction pad K3 are located on the same straight line.

[0036] Preferably, the second induction pad K2 has a strip-shaped structure, the top end of the second induction pad K2 is connected to the third induction pad K3, and the bottom end of the second induction pad K2 is connected to the first induction pad K1.

[0037] This invention utilizes the principle of capacitive touch sensing to design a long strip-shaped capacitive sensing pad, which has a simple structure and can accurately detect water level.

[0038] like Figure 3 As shown, in this embodiment, the control circuit 1 includes a main control chip U1, a power supply circuit U2, a debugging sub-circuit U3, and a signal input sub-circuit U4;

[0039] Electronic circuit U2 is connected to main control chip U1 and is used to supply power to main control chip U1;

[0040] The signal input sub-circuit U4 is connected to the main control chip U1 and is used to collect the sensing capacitance information of the first sensing pad K1, the second sensing pad K2 and the third sensing pad K3 in real time, and send the sensing capacitance information to the main control chip U1.

[0041] The debugging sub-circuit U3 is connected to the main control chip U1 and is used to program the main control chip U1 so that the main control chip U1 can generate water level information based on the sensing capacitance information.

[0042] The following describes the main control chip U1, the power supply circuit U2, the debugging sub-circuit U3, and the signal input sub-circuit U4, respectively, with reference to the specific circuit diagram:

[0043] I. Main control chip U1

[0044] like Figure 4As shown, in this embodiment, the main control chip U1 is equipped with a power supply pin VDD, a register pin CMOD, a working voltage pin VSS, a clock pin tCK, a debug pin tDIO, a first signal input pin USRXO, a second signal input pin AIN2, a third signal input pin AIN3, a receive pin PWM2, and a transmit pin PWM3.

[0045] II. Electronic circuit U2

[0046] like Figure 4 As shown, in this embodiment, the power supply circuit U2 includes a first capacitor C1, a second capacitor C2, and a third capacitor C3; wherein, the power supply pin VDD of the main control chip U1 is connected to the power supply, the register pin CMOD of the main control chip U1 is grounded through the third capacitor C3, and the operating voltage pin VSS of the main control chip U1 is grounded; one end of the first capacitor C1 is connected to the power supply, and the other end is grounded, and the first capacitor C1 and the second capacitor C2 are connected in parallel.

[0047] It should be noted that the first capacitor C1 and the second capacitor C2 are filtering and decoupling capacitors, which can realize the filtering and decoupling function; the third capacitor C3 is a touch sensing threshold adjustment capacitor, which can realize the touch function.

[0048] III. Debugging Sub-circuit U3

[0049] like Figure 4 As shown, in this embodiment, the debugging sub-circuit U3 includes a programming debugging interface P1, and the clock pin tCK and the debugging pin tDIO of the main control chip U1 are respectively connected to the programming debugging interface P1.

[0050] IV. Signal Input Sub-circuit U4

[0051] like Figure 4 As shown, in this embodiment, the signal input sub-circuit U4 includes a first resistor R1, a second resistor R2, and a third resistor R3; wherein, the first signal input pin USRX0 of the main control chip U1 is connected to the first induction pad K1 through the first resistor R1, the second signal input pin AIN2 of the main control chip U1 is connected to the second induction pad K2 through the second resistor R2, and the third signal input pin AIN3 of the main control chip U1 is connected to the third induction pad K3 through the third resistor R3.

[0052] It should be noted that the first resistor R1, the second resistor R2 and the third resistor R3 are impedance matching resistors, which can effectively match the first induction pad K1, the second induction pad K2 and the third induction pad K3.

[0053] Therefore, this embodiment of the utility model utilizes the relationship between the effective sensing area of ​​the second sensing pad K2 and the sensing capacitance to achieve real-time detection of the water level height of the target container through sensing capacitance detection. This solves the problem that capacitive sensing can only perform single-point detection, is easy to install, and does not damage the structural integrity.

[0054] See Figure 5 , Figure 5 A second embodiment of the control circuit 1 is shown, with Figure 3 Unlike the first embodiment shown, in this embodiment, the control circuit 1 further includes a signal input sub-circuit U4;

[0055] The communication sub-circuit U5 is connected to the main control chip U1 and is used for communication between the main control chip U1 and external terminals.

[0056] like Figure 6 As shown, in this embodiment, the communication sub-circuit U5 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a power supply communication interface CN1. One end of the fourth resistor R4 is connected to the receive pin PWM2 of the main control chip U1, and the other end is connected to the power supply communication interface CN1. One end of the fifth resistor R5 is connected to the transmit pin PWM3 of the main control chip U1, and the other end is connected to the power supply communication interface CN1. One end of the sixth resistor R6 is grounded through the fourth capacitor C4, and the other end is grounded through the fifth capacitor C5 and connected to the other end of the fourth resistor R4. One end of the seventh resistor R7 is grounded through the fourth capacitor C4, and the other end is grounded through the sixth capacitor C6 and connected to the other end of the fifth resistor R5.

[0057] It should be noted that capacitors C4, C5, and C6 are filtering and decoupling capacitors; resistors R4 and R5 are current-limiting and suppression resistors; and resistors R6 and R7 are pull-up resistors. Through the cooperation of these electrical components, the main control chip U1 can directly communicate with the external load circuit.

[0058] For example, when the third sensing pad K3 is triggered, it indicates that the water level in the target container has exceeded the detectable range. At this time, an alarm signal can be sent to the external load circuit through the communication sub-circuit U5.

[0059] Accordingly, this utility model embodiment also discloses a toilet, including a water tank, a toilet body, and the aforementioned water level detection sensor; wherein, the first induction pad K1, the second induction pad K2, and the third induction pad K3 are sequentially arranged on the outer side of the water tank from bottom to top, the first induction pad K1 is located at the lowest water level of the water tank, the third induction pad K3 is located at the highest water level of the water tank, and the second induction pad K2 extends from the lowest water level of the water tank to the highest water level of the target container; the control circuit is located on the outer side of the water tank and is connected to the first induction pad K1, the second induction pad K2, and the third induction pad K3 respectively.

[0060] Therefore, by applying a water level detection sensor to the toilet tank, the water level in the toilet tank can be continuously detected, facilitating precise water level control and demonstrating strong practicality and reliability.

[0061] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A water level detecting sensor, characterized by, The control circuit comprises a first sensing pad, a second sensing pad, a third sensing pad and a control circuit; The first sensing pad, the second sensing pad and the third sensing pad are sequentially arranged on the outside of the target container from bottom to top, the first sensing pad is arranged at the lowest water level of the target container, the third sensing pad is arranged at the highest water level of the target container, and the second sensing pad extends from the lowest water level of the target container to the highest water level of the target container; The control circuit is arranged on the outside of the target container and is connected with the first sensing pad, the second sensing pad and the third sensing pad respectively; The control circuit comprises a main control chip, a power supply circuit, a debugging sub-circuit and a signal input sub-circuit; the power supply circuit is connected with the main control chip and is used for supplying power to the main control chip; the signal input sub-circuit is connected with the main control chip and is used for collecting sensing capacitance information of the first sensing pad, the second sensing pad and the third sensing pad in real time and sending the sensing capacitance information to the main control chip; the debugging sub-circuit is connected with the main control chip and is used for burning a program into the main control chip so that the main control chip generates water level height information according to the sensing capacitance information.

2. The water level detecting sensor according to claim 1, wherein The first sensing pad, the second sensing pad and the third sensing pad are arranged on the same straight line.

3. The water level detecting sensor according to claim 1, wherein The second sensing pad is in a strip structure, the top end of the second sensing pad is connected with the third sensing pad, and the bottom end of the second sensing pad is connected with the first sensing pad.

4. The water level detecting sensor according to claim 1, wherein The power supply circuit comprises a first capacitor, a second capacitor and a third capacitor; A power supply pin of the main control chip is connected with a power supply, a register pin of the main control chip is grounded through the third capacitor, and a working voltage pin of the main control chip is grounded; One end of the first capacitor is connected with the power supply, and the other end is grounded, and the first capacitor is connected with the second capacitor in parallel.

5. The water level detecting sensor according to claim 1, wherein The signal input sub-circuit comprises a first resistor, a second resistor and a third resistor; A first signal input pin of the main control chip is connected with the first sensing pad through the first resistor, a second signal input pin of the main control chip is connected with the second sensing pad through the second resistor, and a third signal input pin of the main control chip is connected with the third sensing pad through the third resistor.

6. The water level detecting sensor according to claim 1, wherein The debugging sub-circuit comprises a burning debugging interface; A clock pin and a debugging pin of the main control chip are connected with the burning debugging interface respectively.

7. The water level detecting sensor according to claim 1, wherein The control circuit further comprises a communication sub-circuit; The communication sub-circuit is connected with the main control chip and is used for communication between the main control chip and an external terminal.

8. The water level detecting sensor according to claim 7, wherein The communication sub-circuit comprises a fourth capacitor, a fifth capacitor, a sixth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a power supply communication interface; One end of the fourth resistor is connected with a receiving pin of the main control chip, and the other end is connected with the power supply communication interface; One end of the fifth resistor is connected with a sending pin of the main control chip, and the other end is connected with the power supply communication interface; One end of the sixth resistor is grounded through the fourth capacitor, and the other end is grounded through the fifth capacitor and connected with the other end of the fourth resistor; One end of the seventh resistor is grounded through a fourth capacitor, and the other end is grounded through a sixth capacitor and connected to the other end of the fifth resistor.

9. A toilet comprising a water tank and a toilet body, characterized by The water level detection sensor also comprises the water level detection sensor according to any one of claims 1-8. The first sensing pad, the second sensing pad and the third sensing pad are arranged on the outer side of the water tank in sequence from bottom to top, the first sensing pad is arranged at the lowest water level of the water tank, the third sensing pad is arranged at the highest water level of the water tank, and the second sensing pad extends from the lowest water level of the water tank to the highest water level of the target container. The control circuit is arranged on the outer side of the water tank and connected with the first sensing pad, the second sensing pad and the third sensing pad respectively.

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