CN211178656U - Water level detection circuit and device - Google Patents
Water level detection circuit and device Download PDFInfo
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- CN211178656U CN211178656U CN201922450601.3U CN201922450601U CN211178656U CN 211178656 U CN211178656 U CN 211178656U CN 201922450601 U CN201922450601 U CN 201922450601U CN 211178656 U CN211178656 U CN 211178656U
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Abstract
The application discloses water level detection circuit and device, water level detection device are including the box that is used for holding water, the circuit includes: the water level detection end is arranged in the box body and at least comprises a first detection contact and a second detection contact; the connecting end at least comprises a first connecting end and a second connecting end which are used for being connected with each other, and the first connecting end is connected with the water level detection end; the first pin of the first connecting end is connected with the first detection contact and the second pin of the first connecting end, and the third pin of the first connecting end is connected with the second detection contact; the first pin of the second connecting end is connected with the positive power supply end, the third pin of the second connecting end is connected with the negative power supply end, and a divider resistor connected with the detection module in parallel is arranged between the second pin and the third pin of the second connecting end. This application embodiment can in time learn whether the link is normally connected, improves water level detection device's reliability.
Description
Technical Field
The application relates to the field of electronic detection, in particular to a water level detection circuit and a water level detection device.
Background
With the widespread use of various electronic devices, these electronic devices need various sensors for automatically sensing the current physical state, so as to implement a corresponding automatic control strategy according to the current physical state. For example, in some devices requiring a tank to store sewage, in order to prevent water in the tank from overflowing, a water level detection end is usually provided at a critical position of a water level inside the tank.
Specifically, the device can set up two detection contacts at the critical department of the water level of box, and after the water level in the box reachd this critical department, two detection contacts utilize the water realization in the box to switch on in order to trigger following action control. In order to facilitate disassembly and cleaning, the box bodies of the devices can be designed into detachable structures, so that the box bodies can be separated from the devices to be cleaned independently.
Because the detection contact exists, the detection contact and the control circuit need to be electrically connected through the elastic sheet or the metal elastic contact as a connecting end. The elastic stroke of these connection ends is relatively short, and if the mounting position is deviated, the detection contact is likely to fail.
However, the existing control circuit can not know whether the connecting end is normally connected or not, so that the device is easy to cause control failure and poor in reliability under the condition that the connecting end is not normally connected.
SUMMERY OF THE UTILITY MODEL
The application provides a water level detection circuit is applied to among the water level detection device, water level detection device is including the box that is used for holding water, the circuit includes:
the water level detection end is arranged in the box body and at least comprises a first detection contact and a second detection contact;
the connecting ends at least comprise a first connecting end and a second connecting end which are used for being connected with each other, the first connecting end is connected with the water level detection end, and each connecting end at least comprises a first pin, a second pin and a third pin; and
the detection module is respectively connected with the second pin and the third pin of the second connecting end so as to detect the voltage values of the second pin and the third pin;
a first pin of the first connection end is connected with the first detection contact and connected with a second pin of the first connection end, and a third pin of the first connection end is connected with the second detection contact; the first pin of the second connecting end is connected with the positive power supply end, the third pin of the second connecting end is connected with the negative power supply end, and a voltage dividing resistor connected with the detection module in parallel is arranged between the second pin and the third pin of the second connecting end.
In one embodiment, the connection end further comprises a fourth pin;
the fourth pin of the first connecting end is connected with the third pin, and the fourth pin of the second connecting end is connected with the third pin and the second pin through resistors respectively.
In one embodiment, the first pin of the second connection terminal is connected to the positive power terminal and grounded through a first capacitor;
a second pin of the second connecting end is connected with the detection module through a first resistor;
a fourth pin of the second connecting end is connected with the second pin through a second resistor;
and a third pin of the second connecting end is connected with the fourth pin through a third resistor and is connected with the detection module through a fourth resistor.
In an embodiment, a ground capacitor is disposed between the detection module and the first resistor and between the detection module and the fourth resistor.
In one embodiment, the second pin of the second connection terminal is grounded through a fifth resistor;
one end of the fifth resistor is connected between the second pin and the fourth resistor, and the other end of the fifth resistor is grounded.
In one embodiment, a sixth resistor is connected between the first pin of the second connection terminal and the positive power supply terminal.
In an embodiment, the fourth pin of the second connection terminal is connected between the second resistor and the third resistor.
In an embodiment, the first connection end and the second connection end are in interference connection through a metal contact.
In an embodiment, the water level detecting end is a metal detecting end disposed inside the tank body.
The application also provides a water level detection device, which comprises a box body for containing water, wherein the water level detection device comprises a water level detection circuit connected with the box body;
wherein, the water level detection circuit is the water level detection circuit as described in any one of the above items.
By last, water level detection circuit and device in this application, through set up at least three pin at the second link, and set up divider resistance between second pin and third pin, make when first link, under the circumstances that does not normally connect between the second link, detection module can detect out the voltage value and change, and then realize detecting the judgement to the connection condition of link under the prerequisite that satisfies the water level detection function, can in time learn whether the link normally connects, improve water level detection device's reliability.
Drawings
Fig. 1 is a schematic structural diagram of a water level detection circuit according to an embodiment of the present application.
Fig. 2 is another schematic structural diagram of the water level detection circuit according to the embodiment of the present application.
Fig. 3 is a schematic structural diagram of a water level detection device according to an embodiment of the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.
Referring to fig. 1, a structure of a water level detection circuit according to an embodiment of the present disclosure is shown.
As shown in fig. 1, the water level detection circuit includes a water level detection terminal 1, a connection terminal, and a detection module 3.
Wherein the water level detection circuit is applied to a water level detection apparatus including a tank 5 for containing water. In some embodiments, the water level detecting means may be a cleaning device, such as a vacuum cleaner with a mop cleaning function, and the tank 5 is used to store the sewage recovered after cleaning.
The water level detecting terminal 1 is disposed in the tank 5 and includes at least a first detecting contact 11 and a second detecting contact 12. The first detection contact 11 and the second detection contact 12 may be metal contacts extending into the tank 5, or may be other sensors capable of detecting that the water level reaches a critical value, such as an infrared sensor and a capacitance sensor, which is not limited in this application.
The connection end 2 at least comprises a first connection end 21 and a second connection end 22 which are used for being connected with each other, the first connection end 21 is connected with the water level detection end 1, each connection end at least comprises a first pin, a second pin and a third pin, the second pin of the first connection end 21 is connected with the first detection contact 11, and the third pin of the first connection end 21 is connected with the second detection contact 12.
In one embodiment, the connection terminal 2 may be a terminal with a terminal pin, and the connection is performed through an external wire, for example, a detachable serial port or a parallel port, so that the two connection terminals can be conducted.
In another embodiment, the first connection end 21 and the second connection end 22 can be connected by metal contacts in an interference manner. The metal contacts may have elasticity such that the metal contact of one of the connection terminals elastically abuts against the metal contact of the other connection terminal. By using the metal contact as a connecting means, external wiring can be avoided, and the assembly and disassembly are convenient.
The detection module 3 is connected to the second pin and the third pin of the second connection terminal 22, respectively, to detect voltage values of the second pin and the third pin. Specifically, the detection module 3 has two ports, each port has a function of individually detecting a voltage value, and the voltage value between the two pins with respect to the reference ground can be detected by the detection module 3.
It can be understood that the detecting module 3 may adopt a common MCU with a voltage detecting function to implement the functions of the present application, and the specific model specification is not limited herein.
In order to realize the connection detection function of the connection end, a first pin of the second connection end 22 is connected with the positive power supply end, a third pin of the second connection end 22 is connected with the negative power supply end, and a voltage division resistor 4 connected with the detection module 3 in parallel is arranged between the second pin and the third pin of the second connection end 22.
Specifically, when the first connection end 21 is connected to the second connection end 22 and the water level detection end 1 is disconnected, the detection module 3 may detect a first voltage value corresponding to the second pin and a second voltage value corresponding to the second pin. The first voltage value and the second voltage value are not affected by the voltage dividing resistor 4.
When the first connection end 21 is connected to the second connection end 22 and the water level detection end 1 is connected, the two detection contacts of the first connection end 21 are connected by water, the first connection end 21 is short-circuited, and the detection module 3 can detect that the first voltage value corresponding to the second pin changes to the third voltage value and the second voltage value corresponding to the second pin changes to the fourth voltage value because the voltage division condition of the resistor including the voltage division resistor 4 in the circuit changes.
When the first connection end 21 and the second connection end 22 are not connected, the second pin and the third pin of the second connection end 22 have no input voltage, so that the detection module 3 can detect that the voltage values corresponding to the second pin and the third pin are both O.
It can be understood that, based on the above principle, the specific implementation circuit may be adjusted, for example, a filter circuit, a protection circuit, a pull-up resistor/pull-down resistor, and other conventional circuit designs are added, and specifications of electronic components therein may be selected according to actual needs, which is not limited in this application.
By last, water level detection circuit in this application, through set up at least three pin at the second link, and set up divider resistance between second pin and third pin, make when first link, under the circumstances that does not normally connect between the second link, detection module can detect out the voltage value and change, and then realize detecting the judgement to the connection condition of link under the prerequisite that satisfies the water level detection function, can in time learn whether the link normally connects, improve water level detection device's reliability.
Referring to fig. 2, another structure of the water level detecting circuit according to the embodiment of the present disclosure is shown.
As shown in fig. 2, the water level detection circuit includes a water level detection terminal 1, a connection terminal, and a detection module 3.
The water level detecting terminal 1 is disposed in the tank 5 and includes a first detecting contact 11 and a second detecting contact 12.
The connecting end comprises a first connecting end J1 and a second connecting end J2 which are connected with each other, the first connecting end J1 is connected with the water level detection end 1, each connecting end comprises a first pin, a second pin, a third pin and a fourth pin, the second pin of the first connecting end J1 is connected with the first detection contact 11, and the third pin of the first connecting end J1 is connected with the second detection contact 12.
In an embodiment, the fourth pin of the first connection terminal J1 is connected to the third pin, and the fourth pin of the second connection terminal J2 is connected to the third pin and the second pin through resistors, respectively. Through setting up the fourth pin to utilize the partial pressure relation between fourth pin and second pin, the third pin, can make the function judgement that judges whether the link is connected more accurate.
Specifically, a first pin of the second connection terminal J2 is connected to the positive power supply terminal VCC, and is grounded through a first capacitor C1; a second pin of the second connection terminal J2 is connected with the detection module 3 through a first resistor R1; a fourth pin of the second connection terminal J2 is connected with the second pin through a second resistor R2; the third pin of the second connection terminal J2 is connected to the fourth pin through a third resistor R3 and to the detection module 3 through a fourth resistor R4. The fourth pin of the second connection J2 is connected between the second resistor R2 and the third resistor R3.
In addition, in order to improve the circuit stability, a grounded capacitor is provided between the detection module 3 and each of the first resistor R1 and the fourth resistor R4. Specifically, the grounded capacitor includes a second capacitor C2 disposed between the detection module 3 and the first resistor R1, and a third capacitor C3 disposed between the detection module 3 and the fourth resistor R4.
The second pin of the second connection terminal J2 is grounded through a fifth resistor R5; one end of the fifth resistor R5 is connected between the second pin and the fourth resistor R4, and the other end is grounded.
When the first connection terminal J1 is connected to the second connection terminal J2, the fourth pin and the third pin of the first connection terminal J1 are connected to the fourth pin and the third pin of the second connection terminal J2. The first pin connected to the detection module 3 is connected to the positive power source VCC, so that the detection module 3 detects that the pin is in a high level state, which indicates that the first connection terminal J1 is connected to the fourth pin and the third pin of the second connection terminal J2.
When the first connection terminal J1 is connected to the second connection terminal J2, the first pin and the second pin of the first connection terminal J1 are connected to the first pin and the second pin of the second connection terminal J2, and the fourth pin connected to the detection module 3 has a fixed voltage value since it is connected to the positive power supply terminal VCC through the third resistor R3, the second resistor R2, and the sixth resistor R6. If the first pin and the second pin of the first connection terminal J1 are not connected to the first pin and the second pin of the second connection terminal J2, the third resistor R3 divides the voltage of the positive power source terminal VCC such that the voltage value obtained by the detection module 3 connected to the second pin is smaller than the calculated value. At this time, it can be determined that one side of the first connection end J1 or the second connection end J2 is not well connected.
After the connection is determined to be connected, once the water is full, the second resistor R2 is short-circuited with the third resistor R3, and the resistance becomes small. Since the resistance divided voltage between the second pin and the detection module 3 becomes large, the voltage value of the line opposite to the second pin detected by the detection module 3 decreases, and the resistance divided voltage of the line opposite to the fourth pin becomes large, and the voltage value increases.
Obviously, through the resistance value change of the voltage dividing resistor in the different connection states, the connection relation between the first connection end J1 and the second connection end J2 influences the voltage value detected by the detection module, so that the connection condition of the connection ends is detected and judged on the premise of meeting the water level detection function, whether the connection ends are normally connected or not can be timely known, and the reliability of the water level detection device is improved.
Referring to fig. 3, a structure of a water level detecting device according to an embodiment of the present disclosure is shown.
As shown in fig. 3, the water level detecting apparatus 10 includes a water level detecting circuit 100 and a tank 200 connected to the water level detecting circuit 100.
In some embodiments, the water level detecting apparatus 10 may be a cleaning device, such as a vacuum cleaner with a mop cleaning function, and the housing 200 is used for storing the sewage recovered after cleaning.
For specific content of the water level detection circuit 100, reference may be made to the description of the water level detection circuit 100 shown in fig. 1-2, which is not repeated herein.
In some embodiments, the water level detection terminal of the water level detection circuit 100 is disposed at the water level threshold of the tank 200. The critical water level is the position where the water level reaches the preset value and the warning action is required by using the water level detection circuit 100. The specific position can be set according to actual conditions.
After the water level detection circuit 100 is adopted in the water level detection device 10, the connection condition of the connecting ends is detected and judged on the premise of meeting the water level detection function, whether the connecting ends are normally connected or not can be timely known, and the reliability of the water level detection device 10 is improved.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. A water level detection circuit applied to a water level detection device including a tank (5) for containing water, the circuit comprising:
the water level detection end (1) is arranged in the box body (5) and at least comprises a first detection contact (11) and a second detection contact (12);
the connecting ends (2) at least comprise a first connecting end (21) and a second connecting end (22) which are used for being connected with each other, the first connecting end (21) is connected with the water level detection end (1), and each connecting end (2) at least comprises a first pin, a second pin and a third pin; and
the detection module (3) is respectively connected with the second pin and the third pin of the second connecting end (22) so as to detect the voltage values of the second pin and the third pin;
a first pin of the first connection end (21) is connected with the first detection contact (11) and is connected with a second pin of the first connection end (21), and a third pin of the first connection end (21) is connected with the second detection contact (12); the first pin of the second connecting end (22) is connected with the positive power supply end, the third pin of the second connecting end (22) is connected with the negative power supply end, and a divider resistor (4) connected with the detection module (3) in parallel is arranged between the second pin and the third pin of the second connecting end (22).
2. The water level detection circuit of claim 1, wherein the connection terminal further comprises a fourth pin;
the fourth pin of the first connection end J1 is connected to the third pin, and the fourth pin of the second connection end J2 is connected to the third pin and the second pin through resistors, respectively.
3. The water level detection circuit of claim 2, wherein:
a first pin of the second connection terminal J2 is connected to the positive power terminal and is grounded through a first capacitor C1;
a second pin of the second connection terminal J2 is connected with the detection module through a first resistor R1;
the fourth pin of the second connection terminal J2 is connected with the second pin through a second resistor R2;
the third pin of the second connection terminal J2 is connected to the fourth pin through a third resistor R3, and is connected to the detection module through a fourth resistor R4.
4. The water level detecting circuit as claimed in claim 3, wherein a ground capacitor is disposed between the detecting module and the first resistor R1 and the fourth resistor R4.
5. The water level detecting circuit as claimed in claim 3, wherein the second pin of the second connection terminal J2 is grounded through a fifth resistor R5;
one end of the fifth resistor R5 is connected between the second pin and the fourth resistor R4, and the other end is grounded.
6. The water level detecting circuit as claimed in claim 1, wherein a sixth resistor R6 is connected between the first pin of the second connection terminal J2 and the positive power terminal.
7. The water level detecting circuit as claimed in claim 3, wherein the fourth pin of the second connection terminal J2 is connected between the second resistor R2 and the third resistor R3.
8. The water level detecting circuit according to any one of claims 1 to 6, wherein the first connection end J1 and the second connection end J2 are connected by metal contacts in an interference manner.
9. The water level detection circuit according to any one of claims 1 to 6, wherein the water level detection terminal is a metal detection terminal provided inside the tank.
10. A water level detection device comprises a box body for containing water, and is characterized in that the water level detection device comprises a water level detection circuit connected with the box body;
wherein the water level detection circuit is the water level detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450601.3U CN211178656U (en) | 2019-12-31 | 2019-12-31 | Water level detection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450601.3U CN211178656U (en) | 2019-12-31 | 2019-12-31 | Water level detection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211178656U true CN211178656U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922450601.3U Active CN211178656U (en) | 2019-12-31 | 2019-12-31 | Water level detection circuit and device |
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|---|---|
| CN (1) | CN211178656U (en) |
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2019
- 2019-12-31 CN CN201922450601.3U patent/CN211178656U/en active Active
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