CN220455477U - Detection circuit and electronic equipment - Google Patents
Detection circuit and electronic equipment Download PDFInfo
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- CN220455477U CN220455477U CN202321718731.0U CN202321718731U CN220455477U CN 220455477 U CN220455477 U CN 220455477U CN 202321718731 U CN202321718731 U CN 202321718731U CN 220455477 U CN220455477 U CN 220455477U
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 103
- 238000001914 filtration Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 4
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 3
- 244000046052 Phaseolus vulgaris Species 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Abstract
The utility model relates to a detection circuit and electronic equipment, wherein the detection circuit comprises a sampling resistor, a first sampling circuit, a second sampling circuit and a processor; the first end of the sampling resistor is connected with a power supply, and the second end of the sampling resistor is connected with a motor; the first end of the first sampling circuit is connected with the first end of the sampling resistor, and the second end of the first sampling circuit is connected with the processor so as to transmit the first current of the first end of the sampling resistor to the processor; the first end of the second sampling circuit is connected with the second end of the sampling resistor, and the second end of the second sampling circuit is connected with the processor so as to transmit a second current of the second end of the sampling resistor to the processor; the processor determines the operating state of the motor according to the received first current and second current. The utility model utilizes the sampling resistor, the first sampling circuit, the second sampling circuit and the processor to judge the working state of the motor, thereby being capable of improving the accuracy of the detection result and reducing the cost.
Description
Technical Field
The present utility model relates to the field of operation detection in electronic devices, and in particular, to a detection circuit and an electronic device.
Background
In many electronic devices, a motor is provided to perform a predetermined operation, for example, a coffee machine with a bean grinder. In actual operation, the working state of the bean grinding motor needs to be detected, no-load and locked-rotor of the motor are detected by utilizing a current transformer, but the cost of the detection mode is high, the bean grinding motor is easy to be subjected to electromagnetic interference, and the detection result is inaccurate.
Disclosure of Invention
Accordingly, an object of the present utility model is to provide a detection circuit and an electronic device capable of improving accuracy of a detection result and reducing cost.
In a first aspect, the present utility model provides a detection circuit, including a sampling resistor, a first sampling circuit, a second sampling circuit, and a processor;
the first end of the sampling resistor is connected with a power supply, and the second end of the sampling resistor is connected with a motor;
the first end of the first sampling circuit is connected with the first end of the sampling resistor, and the second end of the first sampling circuit is connected with the processor so as to transmit a first current of the first end of the sampling resistor to the processor;
the first end of the second sampling circuit is connected with the second end of the sampling resistor, and the second end of the second sampling circuit is connected with the processor so as to transmit a second current of the second end of the sampling resistor to the processor;
the processor judges the working state of the motor according to the received first current and the received second current.
Preferably, the first sampling circuit comprises a voltage dividing sub-circuit, a protection sub-circuit and a sampling sub-circuit;
the first end of the voltage dividing sub-circuit is connected with the first end of the sampling resistor, and the second end of the voltage dividing sub-circuit is grounded;
the first end of the protection sub-circuit is connected with the voltage dividing sub-circuit, and the second end of the protection sub-circuit is connected with the processor;
the first end of the sampling sub-circuit is connected with the first end of the protection sub-circuit, and the second end of the sampling sub-circuit is connected with the processor.
Preferably, the voltage divider sub-circuit comprises a first resistor and a second resistor;
the first end of the protection subcircuit is connected with a connection point between the first resistor and the second resistor.
Preferably, the protection subcircuit includes a zener diode.
Preferably, the sampling sub-circuit comprises a third resistor.
Preferably, the first sampling circuit further comprises a filtering sub-circuit;
the first end of the filtering sub-circuit is connected with the second end of the voltage dividing sub-circuit, and the second end of the filtering sub-circuit is connected with the processor.
Preferably, the detection circuit further comprises a rectifier bridge;
the rectifier bridge is used for connecting the motor and the sampling resistor.
Preferably, the detection circuit further comprises a relay;
the relay is used for connecting the rectifier bridge with the sampling resistor, and the relay controls on/off between the power supply and the motor.
Preferably, the processor calculates a current difference between the first current and the second current, and determines an operating state of the motor according to the current difference, wherein the operating state includes normal operation, no-load operation and locked-rotor operation.
On the other hand, the utility model also provides electronic equipment, which comprises any one of the detection circuits.
According to the embodiment of the utility model, the first sampling circuit and the second sampling circuit are used for respectively acquiring the currents at the two ends of the sampling resistor, namely the first current and the second current, so that the working state of the motor is judged by the processor according to the difference value of the first current and the second current, the process is not influenced by external factors such as electromagnetic interference, the accuracy of a detection result, namely the working state of the motor is ensured, and meanwhile, the detection cost is reduced.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings that are used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments described in the present utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 shows a schematic diagram of a detection circuit according to the present utility model;
fig. 2 shows a schematic diagram of a detection circuit according to the present utility model.
Reference numerals:
1-sampling resistor; 2-a first sampling circuit; 3-a second sampling circuit; 4-a processor; 5-rectifying bridge; 6-relay; 21-a voltage divider sub-circuit; 22-a protection sub-circuit; 23-sampling sub-circuits; 24-filtering sub-circuits.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In order to keep the following description of the present utility model clear and concise, detailed descriptions of known functions and known components are omitted. Next, a power supply device for electronic equipment provided by the present utility model will be specifically described.
Fig. 1 shows a schematic structural diagram of a detection circuit according to an embodiment of the present utility model, and fig. 2 shows a schematic diagram of the detection circuit. It should be noted that fig. 1 and fig. 2 are only an example of an embodiment of the present utility model, and in practical applications, the connection relationship or the device in fig. 1 and fig. 2 may be adjusted according to actual needs, which is not limited in particular.
Referring to fig. 1 and 2, the detection circuit includes a sampling resistor 1, a first sampling circuit 2, a second sampling circuit 3, and a processor 4. Specifically, a first end of the sampling resistor 1 is connected to a power supply, and a second end of the sampling resistor 1 is connected to a motor to transmit the electric quantity provided by the power supply to the motor through the sampling resistor 1. Here, the power L line is connected to the dc 12V, and in practical application, the power L line and the live line may be arranged to be collinear, and the processor 4 may be a single chip microcomputer or the like.
With continued reference to fig. 1 and 2, a first terminal of the first sampling circuit 2 is connected to a first terminal of the sampling resistor 1, and a second terminal of the first sampling circuit 2 is connected to the processor 4 to transmit a first current of the first terminal of the sampling resistor 1 to the processor 4. Accordingly, the first end of the second sampling circuit 3 is connected to the second end of the sampling resistor 1, and the second end of the second sampling circuit 3 is connected to the processor 4 to transmit the second current of the second end of the sampling resistor 1 to the processor 4. The first sampling circuit 2 and the second sampling circuit 3 may be the same or different.
In the embodiment of the present utility model, the first sampling circuit 2 and the second sampling circuit 3 are the same as each other, that is, the embodiment of the present utility model uses the first sampling circuit 2 for detailed explanation, and the second sampling circuit 3 will not be repeated.
Referring to fig. 2, the first sampling circuit 2 includes a voltage dividing sub-circuit 21, a protection sub-circuit 22, and a sampling sub-circuit 23, where a first end of the voltage dividing sub-circuit 21 is connected to a first end of the sampling resistor 1, and a second end of the voltage dividing sub-circuit 21 is grounded, and as one example, the voltage dividing sub-circuit 21 includes a first resistor and a second resistor, where resistance values of the first resistor and the second resistor may be determined according to rated operating parameters of the processor 4, rated operating parameters of the motor, and the like, so as to divide or shunt voltage or current through the first resistor and the second resistor, to prevent the voltage or current at two ends of the sampling resistor 1 from being too high to damage the processor 4, that is, to protect the processor 4.
Further, a first terminal of the protection sub-circuit 22 is connected to the voltage dividing sub-circuit 21, and a second terminal of the protection sub-circuit 22 is connected to the processor 4. Specifically, the protection sub-circuit 22 includes a zener diode, and the first end of the protection sub-circuit 22 is connected to a connection point between the first resistor and the second resistor, which plays a role of dividing a voltage to prevent the processor 4 from being damaged by the first current or the second current being excessively large when the voltage between the first resistor and the second resistor is greater than a certain voltage value such as 5V, so that the voltage between the first resistor and the second resistor is less than or equal to 5V. Of course, the certain voltage value may be determined according to a single chip microcomputer, which is not particularly limited in the embodiment of the present utility model.
With continued reference to fig. 2, a first terminal of the sampling sub-circuit 23 is connected to a first terminal of the protection sub-circuit 22, and a second terminal of the sampling sub-circuit 23 is connected to the processor 4. The sampling sub-circuit 23 comprises a third resistor which also acts as a voltage divider to prevent the processor 4 from being damaged by excessive current or voltage.
In a specific implementation, the first sampling circuit 2 further includes a filtering sub-circuit 24, where a first end of the filtering sub-circuit 24 is connected to a second end of the voltage dividing sub-circuit 21, and a second end of the filtering sub-circuit 24 is connected to the processor 4, and the filtering sub-circuit 24 filters the first current to prevent the detection circuit or other devices in the electronic device to which the detection circuit belongs from interfering with the first current, so as to ensure accuracy of the first current. Optionally, the filtering subcircuit 24 includes a capacitor.
After the first sampling circuit 2 transmits the first current to the processor 4 and the second sampling circuit 3 transmits the second current to the processor 4, the processor 4 determines the operating state of the motor according to the received difference value of the first current and the second current. In a specific implementation, the processor 4 calculates a current difference between the first current and the second current, and determines an operating state of the motor according to the current difference, where the operating state includes a normal operation, an idle operation, and a locked-rotor operation. As one example, the current difference may be compared with a preset current threshold value to determine an operation state of the motor according to the comparison result.
For example, the current threshold value is set to be 1A, when the calculated current difference is 1A, the operation state of the motor is determined to be normal operation, when the calculated current difference is less than 1A, the operation state of the motor is determined to be idle operation, and when the calculated current difference is greater than 1A, the operation state of the motor is determined to be locked operation. Wherein the current threshold may be determined based on the rated power of the motor.
With continued reference to fig. 2, since the motor is a dc motor, the detection circuit further includes a rectifier bridge 5, and the rectifier bridge 5 is connected in series with the motor and the sampling resistor 1, and converts the ac voltage transmitted by the sampling resistor 1 into a dc voltage and transmits the dc voltage to the motor.
In order to further protect the motor, the detection circuit further comprises a relay 6, wherein the relay 6 is used for connecting the rectifier bridge 5 and the sampling resistor 1, and the relay 6 controls the on/off between the power supply and the motor so as to control the rotation or stop of the motor through the relay 6.
According to the embodiment of the utility model, the first sampling circuit 2 and the second sampling circuit 3 are used for respectively acquiring the currents at the two ends of the sampling resistor 1, namely the first current and the second current, so that the working state of the motor is judged according to the first current and the second current by the processor 4, the process is not influenced by external factors such as electromagnetic interference, the accuracy of a detection result, namely the working state of the motor is ensured, and meanwhile, the detection cost is reduced.
On the other hand, the embodiment of the utility model also provides electronic equipment, which comprises the detection circuit.
The above description is only illustrative of the preferred embodiments of the present utility model and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present utility model is not limited to the specific combinations of technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present utility model (but not limited to) having similar functions are replaced with each other.
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the utility model. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
While various embodiments of the present utility model have been described in detail, the present utility model is not limited to these specific embodiments, and various modifications and embodiments can be made by those skilled in the art on the basis of the inventive concept, and these modifications and modifications should be included in the scope of the claimed utility model.
Claims (10)
1. The detection circuit is characterized by comprising a sampling resistor, a first sampling circuit, a second sampling circuit and a processor;
the first end of the sampling resistor is connected with a power supply, and the second end of the sampling resistor is connected with a motor;
the first end of the first sampling circuit is connected with the first end of the sampling resistor, and the second end of the first sampling circuit is connected with the processor so as to transmit a first current of the first end of the sampling resistor to the processor;
the first end of the second sampling circuit is connected with the second end of the sampling resistor, and the second end of the second sampling circuit is connected with the processor so as to transmit a second current of the second end of the sampling resistor to the processor;
the processor judges the working state of the motor according to the received first current and the received second current.
2. The detection circuit of claim 1, wherein the first sampling circuit comprises a voltage dividing sub-circuit, a protection sub-circuit, and a sampling sub-circuit;
the first end of the voltage dividing sub-circuit is connected with the first end of the sampling resistor, and the second end of the voltage dividing sub-circuit is grounded;
the first end of the protection sub-circuit is connected with the voltage dividing sub-circuit, and the second end of the protection sub-circuit is connected with the processor;
the first end of the sampling sub-circuit is connected with the first end of the protection sub-circuit, and the second end of the sampling sub-circuit is connected with the processor.
3. The detection circuit of claim 2, wherein the voltage divider circuit comprises a first resistor and a second resistor;
the first end of the protection subcircuit is connected with a connection point between the first resistor and the second resistor.
4. The detection circuit of claim 2, wherein the protection subcircuit comprises a zener diode.
5. The detection circuit of claim 2, wherein the sampling sub-circuit comprises a third resistor.
6. The detection circuit according to any one of claims 2 to 5, wherein the first sampling circuit further comprises a filter sub-circuit;
the first end of the filtering sub-circuit is connected with the second end of the voltage dividing sub-circuit, and the second end of the filtering sub-circuit is connected with the processor.
7. The detection circuit of claim 1, further comprising a rectifier bridge;
the rectifier bridge is used for connecting the motor and the sampling resistor.
8. The detection circuit of claim 7, further comprising a relay;
the relay is used for connecting the rectifier bridge with the sampling resistor, and the relay controls on/off between the power supply and the motor.
9. The detection circuit of claim 1, wherein the processor calculates a current difference between the first current and the second current, and determines an operating state of the motor based on the current difference, the operating state including normal operation, no-load operation, and locked-rotor operation.
10. An electronic device comprising a detection circuit as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321718731.0U CN220455477U (en) | 2023-07-03 | 2023-07-03 | Detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321718731.0U CN220455477U (en) | 2023-07-03 | 2023-07-03 | Detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220455477U true CN220455477U (en) | 2024-02-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321718731.0U Active CN220455477U (en) | 2023-07-03 | 2023-07-03 | Detection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220455477U (en) |
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2023
- 2023-07-03 CN CN202321718731.0U patent/CN220455477U/en active Active
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