CN216815694U - Liquid level detection device and intelligent closestool - Google Patents
Liquid level detection device and intelligent closestool Download PDFInfo
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- CN216815694U CN216815694U CN202220189218.6U CN202220189218U CN216815694U CN 216815694 U CN216815694 U CN 216815694U CN 202220189218 U CN202220189218 U CN 202220189218U CN 216815694 U CN216815694 U CN 216815694U
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Abstract
The utility model discloses a liquid level detection device and an intelligent closestool, wherein the system comprises: the liquid level detection circuit board, the sealing shell and the magnetic ring floater floating up and down along with the liquid level; the liquid level detection circuit board is arranged inside the sealed shell; the magnetic ring floater is sleeved outside the sealing shell; a magnetic pole switch chip is arranged on the liquid level detection circuit board; the magnetic pole switch chip is arranged at the liquid level detection position and used for outputting a liquid level signal according to the position of the magnetic ring floater; the liquid level detection circuit board is further provided with a liquid level signal wiring terminal used for transmitting power signals and liquid level signals and a GND wiring terminal used for transmitting grounding signals. The utility model can detect the liquid level in the container, and can supply power and transmit liquid level signals by only one signal wire connected with the liquid level signal wiring terminal.
Description
Technical Field
The utility model relates to the technical field of liquid detection, in particular to a liquid level detection device and an intelligent closestool.
Background
The existing intelligent closestool water tank liquid level detection method mainly comprises the following two steps: 1. detecting the liquid level by means of opening/closing/opening/closing of a reed switch; 2. the liquid level is detected by the closing/opening of the magnetic pole switch. The method for detecting the liquid level of the water tank by using the reed switch technology has the advantages that the reed switch glass seal is easy to damage, and the internal antioxidant inert gas can be dissipated after the reed switch glass seal is damaged, so that the switch contact is finally oxidized to cause the poor contact of the switch contact, the liquid level signal cannot be correctly detected, the easy damage defect of the reed switch makes the liquid level switch of the reed switch technology have high requirement on production conditions, the logistics turnover technology is high, and the product reject ratio is high. When the method for detecting the liquid level by closing/opening the magnetic pole switch is used for detecting the upper, middle and lower liquid level states, the magnetic pole switch detection circuit needs a power line, a ground line, an upper liquid level signal line and a lower liquid level signal line, namely, a special power line is needed for supplying power, and the specific circuit schematic diagram is shown in the attached figure 1.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a liquid level detection device and an intelligent closestool, which can detect the liquid level in a container and can carry out power supply and liquid level signal transmission only by a signal wire connected with a liquid level signal terminal.
The utility model adopts the following technical scheme:
in one aspect, a liquid level detection device includes: the liquid level detection circuit board, the sealing shell and the magnetic ring floater float up and down along with the liquid level; the liquid level detection circuit board is arranged inside the sealed shell; the magnetic ring floater is sleeved outside the sealing shell; a magnetic pole switch chip is arranged on the liquid level detection circuit board; the magnetic pole switch chip is arranged at a liquid level detection position and used for outputting a liquid level signal according to the position of the magnetic ring floater; and the liquid level detection circuit board is also provided with a liquid level signal wiring terminal for transmitting a power supply signal and a liquid level signal and a GND wiring terminal for transmitting a grounding signal.
Preferably, the liquid level detection device further comprises: an upper liquid level float limiting baffle and a lower liquid level float limiting baffle; the upper liquid level float limiting blocking piece is arranged at the top of the sealing shell; the lower liquid level float limiting blocking piece is arranged at the bottom of the sealing shell.
Preferably, the magnetic pole switch chip comprises two or more pieces; the liquid level signal wiring terminals comprise two or more; each magnetic pole switch chip is arranged at a liquid level detection position; each magnetic pole switch chip corresponds to one liquid level signal terminal.
Preferably, the pole switch chip comprises an even number of pieces; every two magnetic pole switch chips are in a group, and the power supply end of one magnetic pole switch chip is connected with the liquid level signal wiring end of the other magnetic pole switch chip.
Preferably, the pole switch chip comprises a first pole switch chip and a second pole switch chip; the liquid level signal terminal comprises an upper liquid level signal terminal and a lower liquid level signal terminal; the first magnetic pole switch chip is arranged at an upper liquid level detection position and is connected with the upper liquid level signal wiring terminal; the second magnetic pole switch chip is arranged at the lower liquid level detection position and is connected with the lower liquid level signal terminal.
Preferably, the output end of the first magnetic pole switch chip is connected with the upper liquid level signal wiring end; the power supply end of the first magnetic pole switch chip is connected with the lower liquid level signal wiring end through a first diode; the output end of the second magnetic pole switch chip is connected with the lower liquid level signal wiring end; and the power supply end of the second magnetic pole switch chip is connected with the upper liquid level signal wiring end through a second diode.
Preferably, a power supply end of the first pole switch chip is connected with a cathode of the first diode; the lower liquid level signal terminal is connected with the anode of the first diode; the power supply end of the second magnetic pole switch chip is connected with the cathode of the second diode; and the upper liquid level signal terminal is connected with the anode of the second diode.
Preferably, the output end of the first magnetic pole switch chip is connected with the upper liquid level signal terminal through a third resistor; the power supply end of the first magnetic pole switch chip is connected with the lower liquid level signal wiring end through a second resistor; the output end of the second magnetic pole switch chip is connected with the lower liquid level signal wiring end through a fourth resistor; and the power supply end of the second magnetic pole switch chip is connected with the upper liquid level signal wiring end through a first resistor.
Preferably, a second capacitor is arranged between a power end and a ground end of the first magnetic pole switch chip, and the ground end of the first magnetic pole switch chip is connected with a GND terminal; a first capacitor is arranged between the power end and the ground end of the second magnetic pole switch chip, and the ground end of the second magnetic pole switch chip is connected with the GND terminal.
In another aspect, an intelligent closestool, includes the closestool host computer, still includes: the liquid level detection device; the liquid level detection device is installed in the intelligent closestool water tank.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the magnetic ring floater of the liquid level detection device can float up and down along with the liquid level, and when the magnetic ring floater does not float to the liquid level detection position, the magnetic pole switch chip receives a power supply signal input by the signal receiving equipment through the liquid level signal terminal; when the magnetic ring floater floats to a certain liquid level detection position, the magnetic ring floater can be detected by the corresponding magnetic pole switch chip, so that a corresponding liquid level signal is output to the signal receiving equipment through the liquid level signal terminal, therefore, the utility model can realize the detection of the liquid level in the container, and the power supply and the liquid level signal transmission can be carried out only by one signal wire connected with the liquid level signal terminal, so that the signal receiving equipment does not need to provide an independent power supply connection wire for the magnetic pole switch chip;
(2) the liquid level detection circuit board provided by the utility model adds a protection circuit for the magnetic pole switch chip through the resistor and the capacitor, so that the risk of damage to the magnetic pole switch chip caused by electrostatic discharge in the production and transportation process can be reduced;
(3) the magnetic pole switch chip and the peripheral circuit are easy to expand, the number of the magnetic pole switch chips can be adjusted according to the requirement of the liquid level detection position, and the requirements of upper, middle and lower liquid level detection and the requirement of multi-liquid level scale detection are met.
The above description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the description of the technical means more comprehensible.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a prior art magnetic pole switch liquid level detection circuit;
FIG. 2 is a schematic structural diagram of a liquid level detection apparatus according to a first embodiment of the present invention;
FIG. 3 is a circuit diagram of a liquid level detection circuit board according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a liquid level detection apparatus according to a second embodiment of the present invention;
fig. 5 is a circuit diagram of a liquid level detection circuit board according to a first embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
Referring to fig. 2, the liquid level detecting apparatus of the present embodiment includes: the liquid level detection circuit board 10, the sealing shell 20 and the magnetic ring floater 30 which floats up and down along with the liquid level; the liquid level detection circuit board 10 is arranged inside the sealed shell 20; the magnetic ring floater 30 is sleeved outside the sealing shell 20; a magnetic pole switch chip is arranged on the liquid level detection circuit board 10; the magnetic pole switch chip is arranged at a liquid level detection position and used for outputting a liquid level signal according to the position of the magnetic ring floater 30; the liquid level detection circuit board 10 is further provided with a liquid level signal terminal for transmitting a power signal and a liquid level signal and a GND terminal for transmitting a grounding signal.
Specifically, the sealing housing 20 is waterproof, and in addition, if the liquid level of the corrosive liquid is detected, the material of the sealing housing 20 of the embodiment may be corrosion-resistant.
The liquid level detection device, still include: an upper liquid level float limiting baffle 501 and a lower liquid level float limiting baffle 502; the upper liquid level float limiting baffle 501 is arranged at the top of the sealing shell 20 to prevent the magnetic ring float 30 from falling out of the upper part of the sealing shell 20; the lower liquid level float limiting baffle 502 is arranged at the bottom of the sealing shell 20 to prevent the magnetic ring float 30 from falling out of the lower part of the sealing shell 20.
Referring to fig. 2 and 3, in the present embodiment, the pole switching chip includes a first pole switching chip 401 and a second pole switching chip 402; the liquid level signal terminals comprise an upper liquid level signal terminal and a lower liquid level signal terminal, the upper liquid level signal terminal is connected with a signal receiving device through an upper liquid level signal line 701 (the signal receiving device can be a terminal device comprising an MCU (microprogrammed control unit) microprocessor, and can also be a computer terminal, and the like), and the lower liquid level signal terminal is connected with the signal receiving device through a lower liquid level signal line 702 (the signal receiving device can be an independent MCU circuit board, can also be a terminal device of the MCU microprocessor, and can also be a computer terminal, and the like); the first magnetic pole switch chip 401 is arranged at an upper liquid level detection position 601, and the first magnetic pole switch chip 401 is connected with the upper liquid level signal terminal; the second pole switch chip 402 is disposed at a lower liquid level detection position 602, and the second pole switch chip 402 is connected to the lower liquid level signal terminal.
Specifically, the output end OUT of the first magnetic pole switch chip 401 is connected to the upper liquid level signal terminal to output an upper liquid level signal 801; the power supply end VDD of the first pole switch chip 401 is connected to the lower level signal terminal through a first diode D1; the output end OUT of the second pole switch chip 402 is connected to the lower level signal terminal to output a lower level signal 802; the power terminal VDD of the second pole switching chip 402 is connected to the upper level signal terminal through a second diode D2.
In this embodiment, the first magnetic pole switch chip 401 and the second magnetic pole switch chip 402 are used to detect the position of the magnetic ring float 30 floating up and down along with the height of the liquid level. The first magnetic pole switch chip 401 and the second magnetic pole switch chip 402 need to select a magnetic pole switch chip with an output end OUT internal circuit model in an open-drain output mode. When the magnetic ring floater 30 moves to the position of the first magnetic pole switch chip 401, the first magnetic pole switch chip 401 detects that the magnetic field signal output end OUT is opened and closed to GND, and when the magnetic ring floater 30 moves to the position of the second magnetic pole switch chip 402, the second magnetic pole switch chip 402 detects that the magnetic field signal output end OUT is opened and closed to GND. When the power supply terminal VDD of the first magnetic pole switch chip 401 is not powered or the magnetic ring float 30 leaves the position of the first magnetic pole switch chip, the first magnetic pole switch chip 401 cannot detect a magnetic field signal, and the output terminal OUT is disconnected to the ground to be in a high impedance state. When the power supply terminal VDD of the second pole switch chip 402 is not powered or the magnetic ring float 30 is away from the position of the second pole switch chip 402, the second pole switch chip 402 cannot detect the magnetic field signal, and the output terminal OUT is disconnected from the ground to be in a high impedance state.
The power supply terminal VDD of the first pole switch chip 401 is connected to the cathode of the first diode D1; the lower liquid level signal terminal is connected with the anode of the first diode D1; the power supply terminal VDD of the second pole switching chip 402 is connected to the cathode of the second diode D2; the upper level signal terminal is connected to the anode of the second diode D2.
The output end OUT of the first magnetic pole switch chip 401 is connected with the upper liquid level signal terminal through a third resistor R3; the power supply end VDD of the first pole switch chip 401 is connected to the lower liquid level signal terminal through a second resistor R2; the output end OUT of the second pole switch chip 402 is connected with the lower liquid level signal terminal through a fourth resistor R4; the power source terminal VDD of the second pole switch chip 402 is connected to the upper level signal terminal through a first resistor R1.
A second capacitor C2 is arranged between a power supply end VDD and a ground end of the first pole switch chip 401, and the ground end of the first pole switch chip 401 is connected with a GND terminal; a first capacitor C1 is disposed between a power supply terminal VDD of the second pole switch chip 402 and a ground terminal, and the ground terminal of the second pole switch chip 402 is connected to a GND terminal.
In this embodiment, the first diode D1 and the second diode D2 function as a voltage reverse blocking function to improve the signal detection sensitivity. When the output end OUT of the first pole switch chip 401 is pulled to a low level, the upper liquid level signal 801 is pulled low, the second diode D2 is turned off in the reverse direction, and the first capacitor C1 does not supply power to the upper liquid level signal 801, so that the upper liquid level signal 801 can be quickly and effectively lowered to the low level; when the output OUT of the second pole switch chip 402 is pulled low, the lower level signal 802 is pulled low, and the first diode D1 turns off the second capacitor C2 in the reverse direction to stop supplying power to the lower level signal 802, so that the lower level signal 802 can be quickly and effectively lowered to a low level.
The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 play a role in antistatic protection, and can prevent the power supply end VDD and the output end OUT of the first magnetic pole switch chip 401 and the second magnetic pole switch chip 402 from being subjected to electrostatic breakdown; the first capacitor C1 and the second capacitor C2 play roles in power storage, filtering and antistatic protection.
In this embodiment, the operation principle of the circuit shown in fig. 3 is as follows:
the upper liquid level signal line 701 is connected in series with a first resistor R1, then connected in series with a second diode D2, then connected with a first capacitor C1, and connected to the power supply terminal VDD of the second pole switch chip 402 to supply power to the second pole switch chip 402, and the signal output terminal OUT of the second pole switch chip 402 is connected in series with a fourth resistor R4 and then connected to the lower liquid level signal line 702.
The lower liquid level signal line 702 is connected in series with the second resistor R2, the first diode D1, the second capacitor C2, the power supply terminal VDD of the first pole switch chip 401 for supplying power to the first pole switch chip 401, and the output terminal OUT of the first pole switch chip 401 is connected in series with the third resistor R3 and then connected to the upper liquid level signal line 701.
The process of the liquid level detection device and the signal receiving equipment connected for signal transmission in this embodiment is as follows: the signal receiving device provides high level signals for the upper liquid level signal 801 and the lower liquid level signal 802, detects and judges the logic levels of the upper liquid level signal 801 and the lower liquid level signal 802, and a GND line 705 connected with a GND terminal is connected with a signal receiving device ground.
The liquid level judgment logic of the embodiment is as follows:
the logic of the magnetic ring float 30 at the upper liquid level detection position 601 is that the upper liquid level signal 801 is at a low level, and the lower liquid level signal 802 is at a high level. The logic of the magnetic ring floater 30 at the middle liquid level is that the upper liquid level signal 801 is at a high level, and the lower liquid level signal 802 is at a high level. The logic of the magnetic ring float 30 at the low liquid level is that the upper liquid level signal 801 is at the high level and the lower liquid level signal 802 is at the low level.
When the magnetic ring float 30 is at the lower liquid level detection position 602, the second pole switch chip detects that the magnetic field signal output end OUT is closed to the GND end, the lower liquid level signal 802 is pulled to a low level, at this time, the lower liquid level signal 802 cannot supply power to the power supply end VDD of the first pole switch chip 401, the first pole switch chip 401 stops working, the output end OUT of the first pole switch chip 401 is disconnected to the GND to be in a high-resistance input state, the upper liquid level signal 801 can keep a high level and supply power to the power supply end VDD of the second pole switch chip 402, and the signal receiving device can judge that the magnetic ring float 30 is currently at the lower liquid level through the low level state of the lower liquid level signal 802 and the high level state of the upper liquid level.
When the magnetic ring float 30 is at the middle liquid level, the output ends OUT of the first magnetic pole switch chip 401 and the second magnetic pole switch chip 402 cannot detect the magnetic field signals, the output ends OUT of the first magnetic pole switch chip 401 and the second magnetic pole switch chip 402 are both disconnected from GND to be in a high-impedance input state, the upper liquid level signal 801 and the lower liquid level signal 802 are both at a high level, and at the moment, the signal receiving equipment can judge that the magnetic ring float 30 is at the middle liquid level currently through the fact that the upper liquid level signal 801 and the lower liquid level signal 802 are both in a high level state.
When the magnetic ring floater 30 is at the upper liquid level, the output end OUT of the first magnetic pole switch chip 401 is closed to the GND end, the upper liquid level signal 801 is pulled to the low level, at this time, the upper liquid level signal 801 cannot supply power to the power supply end VDD of the second magnetic pole switch chip 402, the second magnetic pole switch chip 402 stops working, the output end OUT of the second magnetic pole switch chip 402 is disconnected to the GND to be in a high-resistance input state, the lower liquid level signal 802 can keep the high level and supply power to the power supply end VDD of the first magnetic pole switch chip, and the signal receiving device can judge that the magnetic ring floater is at the upper liquid level currently through the low level state of the upper liquid level signal 801 and the high level state of the lower liquid level.
In conclusion, the liquid level detection device of the embodiment can perform upper, middle and lower liquid level detection.
In another aspect, an intelligent closestool, includes the closestool host computer, still includes: the liquid level detection device; the liquid level detection device is installed in the intelligent closestool water tank.
Example two
The difference between this embodiment and embodiment one lies in, the container that needs to detect the liquid level includes 7 liquid level scales, promptly through expanding magnetic pole switch chip and expanding the liquid level detection circuit that corresponds, can carry out 7 scale liquid level detection.
Referring to fig. 4, a liquid level detecting device of the present embodiment includes: the liquid level detection circuit board 10, the sealing shell 20 and the magnetic ring floater 30 floating up and down along with the liquid level; the liquid level detection circuit board 10 is arranged inside the sealed shell 20; the magnetic ring floater 30 is sleeved outside the sealing shell 20; a magnetic pole switch chip is arranged on the liquid level detection circuit board 10; the magnetic pole switch chip is arranged at the liquid level detection position and used for outputting a liquid level signal according to the position of the magnetic ring floater 30; the liquid level detection circuit board 10 is further provided with a liquid level signal terminal for transmitting a power signal and a liquid level signal and a GND terminal for transmitting a grounding signal.
Specifically, the sealing housing 20 is waterproof, and in addition, if the liquid level of the corrosive liquid is detected, the material of the sealing housing 20 of the embodiment may be corrosion-resistant.
The liquid level detection device, still include: an upper liquid level float limiting baffle 501 and a lower liquid level float limiting baffle 502; the upper liquid level float limiting baffle 501 is arranged at the top of the sealing shell 20 to prevent the magnetic ring float 30 from falling out of the upper part of the sealing shell 20; the lower liquid level float limiting baffle 502 is arranged at the bottom of the sealing shell 20 to prevent the magnetic ring float 30 from falling out of the lower part of the sealing shell 20.
Referring to fig. 4 and 5, in the present embodiment, the pole switching chips include a first pole switching chip 401, a second pole switching chip 402, a third pole switching chip 403, and a fourth pole switching chip 404; the liquid level signal terminals comprise a first liquid level signal terminal, a second liquid level signal terminal, a third liquid level signal terminal and a fourth liquid level signal terminal, and the first liquid level signal terminal is connected with signal receiving equipment (the signal receiving equipment can be terminal equipment comprising an MCU (microprogrammed control Unit) microprocessor, or a computer terminal and the like) through a first liquid level signal line 701; the second liquid level signal terminal is connected with the signal receiving equipment through a second liquid level signal line 702; the third liquid level signal terminal is connected with the signal receiving equipment through a third liquid level signal line 703, and the fourth liquid level signal terminal is connected with the signal receiving equipment through a fourth liquid level signal line 704; the first magnetic pole switch chip 401 is arranged at a first liquid level detection position 601, and the first magnetic pole switch chip 401 is connected with the upper first liquid level signal terminal; the second magnetic pole switch chip 402 is arranged at a second liquid level detection position 602, and the second magnetic pole switch chip 402 is connected with the second liquid level signal terminal; the third magnetic pole switch chip 403 is arranged at a third liquid level detection position 603, and the third magnetic pole switch chip 403 is connected with the third liquid level signal terminal; the fourth pole switch chip 404 is disposed at a fourth liquid level detection position 604, and the fourth pole switch chip 404 is connected to the fourth liquid level signal terminal.
In this embodiment, include 7 liquid level scales, set gradually to first liquid level scale 901, second liquid level scale 902, third liquid level scale 903, fourth liquid level scale 904, fifth liquid level scale 905, sixth liquid level scale 906 and seventh liquid level scale 907. The seventh liquid level scale 907 corresponds to the first liquid level detection position 601; the fifth liquid level scale 905 corresponds to the second liquid level detection position 602; the third liquid level scale 903 corresponds to a third liquid level detection position 603; the first liquid level scale 901 corresponds to the fourth liquid level detection position 604.
Specifically, the output end OUT of the first magnetic pole switch chip 401 is connected to the first liquid level signal terminal to output a first liquid level signal 801; the power supply terminal VDD of the first pole switch chip 401 is connected to the second liquid level signal terminal through a first diode D1; the output end OUT of the second magnetic pole switch chip 402 is connected with the second liquid level signal terminal to output a second liquid level signal 802; the power terminal VDD of the second pole switch chip 402 is connected to the first level signal terminal through a second diode D2. An output end OUT of the third magnetic pole switch chip 403 is connected with the third liquid level signal terminal to output a third liquid level signal; the power supply end VDD of the third magnetic pole switch chip 403 is connected with the fourth liquid level signal terminal through a third diode D3; the output end OUT of the fourth magnetic pole switch chip 404 is connected with the fourth liquid level signal terminal so as to output a fourth liquid level signal 804; the power terminal VDD of the fourth pole switch chip 404 is connected to the third level signal terminal through a fourth diode D4.
In this embodiment, the operation principle of the circuit shown in fig. 5 is as follows:
the first liquid level signal line 701 is connected in series with a first resistor R1 and then connected in series with a second diode D2, and then connected with a first capacitor C1 and then connected to the power supply terminal VDD of the second pole switch chip 402 to supply power to the second pole switch chip 402, and the signal output terminal OUT of the second pole switch chip 402 is connected in series with a fourth resistor R4 and then connected to the second liquid level signal line 702.
The second liquid level signal line 702 is connected in series with a second resistor R2, and then connected in series with a first diode D1, and then connected with a first capacitor C2, and then connected to the power supply terminal VDD of the first pole switch chip 401 to supply power to the first pole switch chip 401, and the output terminal signal OUT of the first pole switch chip 401 is connected in series with a third resistor R3 and then connected to the first liquid level signal line 701.
The third liquid level signal line 703 is connected in series with a fifth resistor R5, and then connected in series with a fourth diode D4, and then connected with a fourth capacitor C4, and then connected to the power supply terminal VDD of the fourth pole switch chip 404 to supply power to the fourth pole switch chip 404, and the signal output terminal OUT of the fourth pole switch chip 404 is connected in series with an eighth resistor and then connected to the fourth liquid level signal line 704.
The fourth liquid level signal line 704 is connected in series with a seventh resistor R7, is further connected in series with a third diode D3, is then connected with a third capacitor C3, is further connected to the power supply terminal VDD of the third pole switch chip 403 to supply power to the third pole switch chip 403, and the output terminal OUT of the third pole switch chip 403 is connected in series with a sixth resistor R6 and is then connected to the third liquid level signal line 703.
The connection mode of the utility model and the signal receiving equipment is as follows: the signal receiving device provides high level signals for the first liquid level signal line 701, the second liquid level signal line 702, the third liquid level signal line 703 and the fourth liquid level signal line 704, detects and judges logic levels of the first liquid level signal line 701, the second liquid level signal line 702, the third liquid level signal line 703 and the fourth liquid level signal line 704, and the GND line 705 is connected with a ground wire of the signal receiving device.
The liquid level judgment logic of the embodiment is as follows:
the 7-scale liquid level detection device can carry out correct detection only by meeting two conditions: the detection device can control the liquid level in the container to decrease or increase, or can correctly judge that the liquid level in the container decreases or increases; after the detection device is powered on every time, any one of the first liquid level scale 901, the third liquid level scale 903, the fifth liquid level scale 905 and the seventh liquid level scale 907 needs to be detected first, so that subsequent liquid level scale judgment can be carried out.
When the magnetic ring floater 30 is at the first liquid level scale 901, the judgment logic is that the first liquid level signal line 701, the second liquid level signal line 702, the third liquid level signal line 703 are at a high level, and the fourth liquid level signal line 704 is at a low level;
the logic of the magnetic ring float 30 at the second liquid level scale 902 is divided into two cases: the first liquid level signal line 701, the second liquid level signal line 702 and the third liquid level signal line 703 are at a high level, and the fourth liquid level signal line 704 is changed from a low level to a high level; the second liquid level signal line 701, the second liquid level signal line 702 and the fourth liquid level signal line 704 are at high level, the third liquid level signal line 703 is changed from low level to high level, and the liquid level in the detected container is reduced;
when the magnetic ring float 30 is at the third liquid level scale 903, the judgment logic is that the first liquid level signal line 701, the second liquid level signal line 702, the fourth liquid level signal line 704 are at high level, and the third liquid level signal line 703 is at low level;
the logic of the magnetic ring float 30 at the fourth liquid level scale 904 is divided into two cases: the first liquid level signal line 701, the second liquid level signal line 702 and the fourth liquid level signal line 704 are at high level, the third liquid level signal line 703 is changed from low level to high level, and the liquid level in the detected container is increased; the first liquid level signal line 701, the third liquid level signal line 703 and the fourth liquid level signal line 704 are at high level, the second liquid level signal line 702 is changed from low level to high level, and the liquid level in the detected container is reduced;
the judgment logic of the magnetic ring floater 30 at the fifth liquid level scale 905 is that the first liquid level signal line 701, the third liquid level signal line 703 and the fourth liquid level signal line 704 are at a high level, and the second liquid level signal line 702 is at a low level;
the determination logic that the magnetic ring floater 30 is at the sixth liquid level scale 906 is divided into two conditions: the first liquid level signal line 701, the third liquid level signal line 703 and the fourth liquid level signal line 704 are at a high level, the second liquid level signal line 702 is changed from a low level to a high level, and the liquid level in the detected container is increased; the second liquid level signal line 702, the third liquid level signal line 703 and the fourth liquid level signal line 704 are at high level, the first liquid level signal line 701 is changed from low level to high level, and the liquid level in the detected container is reduced;
the judgment logic that the magnetic ring floater 30 is positioned on the seventh liquid level scale 907 is that the second liquid level signal line 702, the third liquid level signal line 703 and the fourth liquid level signal line 704 are at a high level and the first liquid level signal line 701 is at a low level.
In another aspect, an intelligent closestool, includes the closestool host computer, still includes: the liquid level detection device; the liquid level detection device is installed in the intelligent closestool water tank.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (10)
1. A liquid level detection device, comprising: the liquid level detection circuit board, the sealing shell and the magnetic ring floater float up and down along with the liquid level; the liquid level detection circuit board is arranged inside the sealed shell; the magnetic ring floater is sleeved outside the sealing shell; a magnetic pole switch chip is arranged on the liquid level detection circuit board; the magnetic pole switch chip is arranged at a liquid level detection position and used for outputting a liquid level signal according to the position of the magnetic ring floater; the liquid level detection circuit board is further provided with a liquid level signal wiring terminal used for transmitting power signals and liquid level signals and a GND wiring terminal used for transmitting grounding signals.
2. The fluid level detection unit of claim 1, further comprising: an upper liquid level float limiting baffle and a lower liquid level float limiting baffle; the upper liquid level float limiting blocking piece is arranged at the top of the sealing shell; the lower liquid level float limiting blocking piece is arranged at the bottom of the sealing shell.
3. The liquid level detecting device of claim 1, wherein the magnetic pole switch chip comprises two or more pieces; the liquid level signal wiring terminals comprise two or more; each magnetic pole switch chip is arranged at a liquid level detection position; each magnetic pole switch chip corresponds to one liquid level signal terminal.
4. The fluid level detection apparatus of claim 3, wherein the pole switch chip comprises an even number of plates; every two magnetic pole switch chips are in a group, and the power supply end of one magnetic pole switch chip is connected with the liquid level signal wiring end of the other magnetic pole switch chip.
5. The liquid level detection device of claim 4, wherein the pole switch chip comprises a first pole switch chip and a second pole switch chip; the liquid level signal wiring terminal comprises an upper liquid level signal wiring terminal and a lower liquid level signal wiring terminal; the first magnetic pole switch chip is arranged at an upper liquid level detection position and is connected with the upper liquid level signal wiring terminal; the second magnetic pole switch chip is arranged at the lower liquid level detection position and is connected with the lower liquid level signal terminal.
6. The fluid level detecting apparatus of claim 5, wherein an output of the first pole switch chip is connected to the upper level signal terminal; the power supply end of the first magnetic pole switch chip is connected with the lower liquid level signal wiring end through a first diode; the output end of the second magnetic pole switch chip is connected with the lower liquid level signal wiring end; and the power supply end of the second magnetic pole switch chip is connected with the upper liquid level signal wiring end through a second diode.
7. The liquid level detecting device of claim 6, wherein a power terminal of the first pole switch chip is connected to a cathode of the first diode; the lower liquid level signal terminal is connected with the anode of the first diode; the power supply end of the second magnetic pole switch chip is connected with the cathode of the second diode; and the upper liquid level signal terminal is connected with the anode of the second diode.
8. The fluid level detecting apparatus of claim 6, wherein the output terminal of the first pole switch chip is connected to the upper level signal terminal via a third resistor; the power supply end of the first magnetic pole switch chip is connected with the lower liquid level signal wiring end through a second resistor; the output end of the second magnetic pole switch chip is connected with the lower liquid level signal wiring end through a fourth resistor; and the power supply end of the second magnetic pole switch chip is connected with the upper liquid level signal wiring end through a first resistor.
9. The liquid level detection device according to claim 6, wherein a second capacitor is arranged between a power end and a ground end of the first magnetic pole switch chip, and the ground end of the first magnetic pole switch chip is connected with a GND terminal; and a first capacitor is arranged between the power supply end and the grounding end of the second magnetic pole switch chip, and the grounding end of the second magnetic pole switch chip is connected with the GND terminal.
10. The utility model provides an intelligent closestool, includes the closestool host computer, its characterized in that still includes: the liquid level detection apparatus of any one of claims 1 to 9; the liquid level detection device is installed in the intelligent closestool water tank.
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