CN111257949A - Contact terminal contact detection control circuit and electrical apparatus - Google Patents
Contact terminal contact detection control circuit and electrical apparatus Download PDFInfo
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- CN111257949A CN111257949A CN202010115876.6A CN202010115876A CN111257949A CN 111257949 A CN111257949 A CN 111257949A CN 202010115876 A CN202010115876 A CN 202010115876A CN 111257949 A CN111257949 A CN 111257949A
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention relates to a contact detection control circuit of a contact terminal and an electric appliance. In the electric appliance, a first terminal A and a third terminal C are positioned on a cup body, and a second terminal B is positioned on a cup cover; the first terminal A is grounded through a switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with the first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end and the second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not through the acquisition signal of the second interface so as to judge whether the cup cover is correctly covered on the cup body or not. The invention can actively detect whether the terminals on the cup cover and the cup body are in good contact, eliminates the potential safety hazard caused by the non-contact of the terminals and improves the safety of the electric appliance.
Description
Technical Field
The invention relates to the field of electric appliances, in particular to a contact terminal contact detection control circuit and an electric appliance.
Background
Some electrical apparatus need cover in the course of working to prevent that the liquid in the electrical apparatus holding chamber from overflowing, guarantee the work safety. For example, the wall breaking machine needs to ensure that the cover is covered well in the process of making soybean milk. Some current appliances use an anti-overflow circuit to detect if there is liquid overflow, the anti-overflow circuit being completed by the contact between the lid and the cup, but the detection method requires first to ensure that the terminals on the lid and the terminals on the cup are in contact with each other, and then to detect if there is overflow. And whether do not detect the terminal on the lid among the prior art and contact each other with the terminal on the cup, rely on the user to cover the lid well completely, if the user does not cover the lid well, can lead to the anti-overflow to detect failure, have the potential safety hazard.
Disclosure of Invention
The present invention is directed to a contact detection control circuit and an electrical appliance, which are provided to overcome the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a contact terminal contact detection control circuit is constructed and comprises a first terminal A, a second terminal B, a third terminal C, a switch circuit, a power supply terminal and a detection control circuit;
the first terminal A is grounded through the switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with a first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end, the third terminal C is connected with a second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not according to a signal acquired by the second interface;
the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, the second interface of the detection control circuit detects a low level; and if the first terminal A and the second terminal B are not contacted, the second interface of the detection control circuit detects a high level.
Furthermore, the contact terminal contact detection control circuit further comprises a resistor to be detected and a divider resistor, the second terminal B is grounded through the resistor to be detected, and the third terminal C is connected with the power supply end through the divider resistor;
if the second interface of the detection control circuit detects a low level, the first interface of the detection control circuit controls the switch circuit to be switched off; and a second interface of the detection control circuit determines the resistance value of the resistor to be detected through detecting voltage.
Further, in the contact terminal contact detection control circuit according to the present invention, the voltage dividing resistor is a resistor R1, and the third terminal C is connected to the power supply terminal through the resistor R1.
Further, in the contact terminal contact detection control circuit of the present invention, the switch circuit includes a transistor Q, a resistor R2, a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through the resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through the resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A;
the triode Q is switched on when the first interface of the detection control circuit outputs a high level, and the triode Q is switched off when the first interface of the detection control circuit outputs a low level.
Furthermore, the contact terminal contact detection control circuit also comprises a feedback circuit which is connected with the detection control circuit and used for displaying the detection result;
the feedback circuit comprises one or more of a display screen, an audio player and an indicator light.
In addition, the invention also provides an electric appliance, which comprises a cup cover and a cup body for containing liquid, and further comprises a first terminal A, a second terminal B, a third terminal C, a switch circuit, a power supply end and a detection control circuit; the first terminal A and the third terminal C are positioned on the cup body, and the second terminal B is positioned on the cup cover; when the cup cover is correctly covered on the cup body, the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C;
the first terminal A is grounded through the switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with a first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end, the third terminal C is connected with a second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not according to a signal acquired by the second interface so as to judge whether the cup cover is correctly covered on the cup body or not;
the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, the second interface of the detection control circuit detects a low level; and if the first terminal A and the second terminal B are not contacted, the second interface of the detection control circuit detects a high level.
Furthermore, the electric appliance also comprises a divider resistor, the second terminal B is grounded through the liquid to be detected in the cup body, and the third terminal C is connected with the power supply end through the divider resistor;
if the second interface of the detection control circuit detects a low level, the first interface of the detection control circuit controls the switch circuit to be switched off; and a second interface of the detection control circuit determines whether the liquid to be detected overflows or not through detecting voltage.
Further, in the electric appliance of the present invention, the voltage dividing resistor is a resistor R1, and the third terminal C is connected to the power supply terminal through the resistor R1.
Further, in the electrical appliance of the present invention, the switch circuit includes a transistor Q, a resistor R2, and a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through the resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through the resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A;
the triode Q is switched on when the first interface of the detection control circuit outputs a high level, and the triode Q is switched off when the first interface of the detection control circuit outputs a low level.
Furthermore, the electric appliance also comprises a feedback circuit which is connected with the detection control circuit and used for displaying the detection result;
the feedback circuit comprises one or more of a display screen, an audio player and an indicator light.
The contact terminal contact detection control circuit and the electric appliance have the following beneficial effects that: the invention can actively detect whether the terminals on the cup cover and the cup body are in good contact, eliminates the potential safety hazard caused by the non-contact of the terminals and improves the safety of the electric appliance.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of a contact terminal contact detection control circuit provided in embodiment 1;
fig. 2 is a circuit diagram of a contact terminal contact detection control circuit provided in embodiment 2;
FIG. 3 is a schematic structural diagram of an electrical appliance provided in embodiment 3;
fig. 4 is a circuit diagram of an electrical appliance provided in embodiment 4.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the contact terminal contact detection control circuit of the present embodiment includes a first terminal a, a second terminal B, a third terminal C, a switching circuit, a power supply terminal, and a detection control circuit, where the first terminal a is grounded through the switching circuit, and the first terminal a is grounded after the switching circuit is turned on. The control end of the switch circuit is connected with the first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface. The third terminal C is connected with the power supply end and the second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not according to the acquisition signal of the second interface.
The working principle of the contact terminal contact detection control circuit of the embodiment is as follows: the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, detecting that the second interface of the control circuit detects a low level; if the first terminal a and the second terminal B are not in contact, the second interface of the detection control circuit detects a high level. That is, if the second interface of the detection control circuit detects a low level, it indicates that the first terminal a and the second terminal B are in contact, and the second terminal B and the third terminal C are in contact, which meets the safety requirement. If the second interface of the detection control circuit detects a high level, it indicates that the second terminal B does not contact the first terminal a and the third terminal C simultaneously, and the safety requirement is not met.
Whether this embodiment can initiatively detect the terminal contact well has got rid of because of the potential safety hazard that the terminal does not contact exists, improves the security of electrical apparatus.
Example 2
Referring to fig. 2, on the basis of embodiment 1, the contact terminal contact detection control circuit of this embodiment further includes a resistor to be detected and a voltage dividing resistor, the second terminal B is grounded through the resistor to be detected, and the third terminal C is connected to the power supply terminal through the voltage dividing resistor; if the second interface of the detection control circuit detects the low level, the first interface of the detection control circuit controls the switch circuit to be switched off; and a second interface of the detection control circuit determines the resistance value of the resistor to be detected through the detection voltage.
The measurement principle of the resistor to be detected in the embodiment is as follows: the voltage value output by the power supply end is known, for example, 5V, the resistor to be detected and the voltage dividing resistor are connected in series for voltage division, and the voltage value detected by the second interface of the detection control circuit is the voltage value on the resistor to be detected. The resistance value of the divider resistor is known, and then the resistance value of the resistor to be detected can be calculated by combining the output voltage value of the power supply end and the voltage value of the resistor to be detected.
Alternatively, the voltage dividing resistor in the touch terminal touch detection control circuit of the present embodiment is a resistor R1, and the third terminal C is connected to the power supply terminal through a resistor R1. The resistance of the resistor R1 can be selected as desired.
Alternatively, the switch circuit in the contact terminal contact detection control circuit of the present embodiment includes a transistor Q, a resistor R2, and a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through a resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through a resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A. The triode Q is conducted when the first interface of the detection control circuit outputs a high level, and the triode Q is disconnected when the first interface of the detection control circuit outputs a low level. The detection control circuit can control the on-off of the switch circuit through high and low levels.
Optionally, the contact terminal contact detection control circuit of this embodiment further includes a feedback circuit connected to the detection control circuit and used for displaying the detection result, where the feedback circuit includes, but is not limited to, a display screen, an audio player, an indicator light, and the like, and the detection result is fed back to the user through the display screen, the audio player, the indicator light, and the like, so that the user can conveniently and timely master the connection state of the terminal.
Whether this embodiment can initiatively detect the terminal contact well has got rid of because of the potential safety hazard that the terminal does not contact exists, improves the security of electrical apparatus.
Example 3
Referring to fig. 3, the electric appliance of the present embodiment includes a cup lid 10 and a cup 20 for containing liquid, and further includes a first terminal a, a second terminal B, a third terminal C, a switch circuit, a power supply terminal, and a detection control circuit; the first terminal A and the third terminal C are positioned on the cup body 20, and the second terminal B is positioned on the cup cover 10; when the cup lid 10 is properly closed on the cup 20, the first terminal a contacts the second terminal B, and the second terminal B contacts the third terminal C.
The first terminal A is grounded through a switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with the first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end and the second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are contacted or not according to the acquisition signal of the second interface, so as to judge whether the cup cover 10 is correctly covered on the cup body 20 or not.
The working principle of the electric appliance of the embodiment is as follows: the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, detecting that the second interface of the control circuit detects a low level; if the first terminal a and the second terminal B are not in contact, the second interface of the detection control circuit detects a high level. That is, if the second interface of the detection control circuit detects a low level, it indicates that the first terminal a is in contact with the second terminal B, and the second terminal B is in contact with the third terminal C, and the cup lid 10 is correctly covered on the cup body 20, which meets the safety requirement. If the second interface of the detection control circuit detects a high level, it indicates that the second terminal B does not contact the first terminal a and the third terminal C simultaneously, and the cup lid 10 is not properly covered on the cup body 20, which is not in accordance with the safety requirement.
Whether the terminal contact on this embodiment can initiatively detect bowl cover and the cup is good, has got rid of because of the potential safety hazard that the terminal contactless exists, improves the security of electrical apparatus.
Example 4
Referring to fig. 4, on the basis of embodiment 3, the electric appliance of this embodiment further includes a voltage dividing resistor, the second terminal B is grounded through the liquid to be detected in the cup 20, and the third terminal C is connected to the power supply terminal through the voltage dividing resistor. If the second interface of the detection control circuit detects a low level, the first interface of the detection control circuit controls the switch circuit to be switched off, and the electric appliance starts to work normally; and after the electric appliance starts to work normally, the second interface of the detection control circuit determines whether the liquid to be detected overflows or not through detecting voltage.
The anti-overflow liquid measurement principle of this embodiment does: the voltage value output by the power supply end is known, for example, 5V, the resistor of the liquid to be detected and the voltage dividing resistor are connected in series for voltage division, and the voltage value detected by the second interface of the detection control circuit is the voltage value on the resistor of the liquid to be detected. The resistance value of the divider resistor is known, and then the total output voltage value of the power supply end and the voltage value of the resistor of the liquid to be detected are combined, so that the resistance value of the resistor of the liquid to be detected can be calculated. After the resistance value of the resistor of the liquid to be detected is calculated, whether the liquid overflow occurs can be judged according to a preset judgment method.
Alternatively, the voltage dividing resistor in the electrical appliance of the present embodiment is a resistor R1, and the third terminal C is connected to the power supply terminal through a resistor R1. The resistance of the resistor R1 can be selected as desired.
Optionally, the switch circuit in the electrical appliance of the present embodiment includes a transistor Q, a resistor R2, and a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through a resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through a resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A; the triode Q is conducted when the first interface of the detection control circuit outputs a high level, and the triode Q is disconnected when the first interface of the detection control circuit outputs a low level. The detection control circuit can control the on-off of the switch circuit through high and low levels.
Optionally, the electric appliance of the embodiment further comprises a feedback circuit connected with the detection control circuit and used for displaying the detection result; the feedback circuit comprises but is not limited to a display screen, an audio player, an indicator light and the like, and the detection result is fed back to the user through the display screen, the audio player, the indicator light and the like, so that the user can conveniently and timely master the connection state of the terminal.
Whether the terminal contact on this embodiment can initiatively detect bowl cover and the cup is good, has got rid of because of the potential safety hazard that the terminal contactless exists, improves the security of electrical apparatus.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The contact terminal contact detection control circuit is characterized by comprising a first terminal A, a second terminal B, a third terminal C, a switching circuit, a power supply terminal and a detection control circuit;
the first terminal A is grounded through the switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with a first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end, the third terminal C is connected with a second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not according to a signal acquired by the second interface;
the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, the second interface of the detection control circuit detects a low level; and if the first terminal A and the second terminal B are not contacted, the second interface of the detection control circuit detects a high level.
2. The contact terminal contact detection control circuit according to claim 1, further comprising a resistor to be detected and a voltage dividing resistor, wherein the second terminal B is grounded through the resistor to be detected, and the third terminal C is connected to the power supply terminal through the voltage dividing resistor;
if the second interface of the detection control circuit detects a low level, the first interface of the detection control circuit controls the switch circuit to be switched off; and a second interface of the detection control circuit determines the resistance value of the resistor to be detected through detecting voltage.
3. The touch terminal touch detection control circuit of claim 2, wherein the voltage dividing resistor is a resistor R1, and the third terminal C is connected to the power supply terminal through the resistor R1.
4. The touch terminal touch detection control circuit according to claim 1 or 2, wherein the switching circuit comprises a transistor Q, a resistor R2, a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through the resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through the resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A;
the triode Q is switched on when the first interface of the detection control circuit outputs a high level, and the triode Q is switched off when the first interface of the detection control circuit outputs a low level.
5. The contact terminal contact detection control circuit according to claim 1 or 2, further comprising a feedback circuit connected to the detection control circuit for exhibiting a detection result;
the feedback circuit comprises one or more of a display screen, an audio player and an indicator light.
6. An electric appliance comprises a cup cover (10) and a cup body (20) for containing liquid, and is characterized by further comprising a first terminal A, a second terminal B, a third terminal C, a switch circuit, a power supply end and a detection control circuit; the first terminal A and the third terminal C are positioned on the cup body (20), and the second terminal B is positioned on the cup cover (10); when the cup cover (10) is correctly covered on the cup body (20), the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C;
the first terminal A is grounded through the switch circuit, and the first terminal A is grounded after the switch circuit is switched on; the control end of the switch circuit is connected with a first interface of the detection control circuit, and the detection control circuit controls the on-off of the switch circuit through the first interface; the third terminal C is connected with the power supply end, the third terminal C is connected with a second interface of the detection control circuit, and the detection control circuit judges whether the first terminal A and the second terminal B are in contact or not according to a signal acquired by the second interface so as to judge whether the cup cover (10) is correctly covered on the cup body (20);
the detection control circuit controls the switch circuit to be switched on, and the first terminal A is grounded; if the first terminal A is contacted with the second terminal B, and the second terminal B is contacted with the third terminal C, the second interface of the detection control circuit detects a low level; and if the first terminal A and the second terminal B are not contacted, the second interface of the detection control circuit detects a high level.
7. The electric appliance according to claim 6, characterized in that it further comprises a voltage dividing resistor, the second terminal B is connected to ground through the liquid to be detected in the cup (20), and the third terminal C is connected to the power supply terminal through the voltage dividing resistor;
if the second interface of the detection control circuit detects a low level, the first interface of the detection control circuit controls the switch circuit to be switched off; and a second interface of the detection control circuit determines whether the liquid to be detected overflows or not through detecting voltage.
8. The electric appliance according to claim 7, wherein the voltage dividing resistor is a resistor R1, and the third terminal C is connected to the power supply terminal through the resistor R1.
9. The electrical appliance according to claim 6 or 7, wherein the switching circuit comprises a transistor Q, a resistor R2, a resistor R3; the base electrode of the triode Q is connected with the first interface of the detection control circuit through the resistor R2, the base electrode of the triode Q is connected with the emitting electrode of the triode Q through the resistor R3, and the emitting electrode of the triode Q is grounded; the collector of the triode Q is connected with the first terminal A;
the triode Q is switched on when the first interface of the detection control circuit outputs a high level, and the triode Q is switched off when the first interface of the detection control circuit outputs a low level.
10. The electric appliance according to claim 6 or 7, characterized in that it further comprises a feedback circuit connected with the detection control circuit for displaying the detection result;
the feedback circuit comprises one or more of a display screen, an audio player and an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115876.6A CN111257949A (en) | 2020-02-25 | 2020-02-25 | Contact terminal contact detection control circuit and electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115876.6A CN111257949A (en) | 2020-02-25 | 2020-02-25 | Contact terminal contact detection control circuit and electrical apparatus |
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| CN111257949A true CN111257949A (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010115876.6A Pending CN111257949A (en) | 2020-02-25 | 2020-02-25 | Contact terminal contact detection control circuit and electrical apparatus |
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| CN (1) | CN111257949A (en) |
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Application publication date: 20200609 |