CN218098073U - Temperature detection circuit and earphone storehouse of charging - Google Patents
Temperature detection circuit and earphone storehouse of charging Download PDFInfo
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- CN218098073U CN218098073U CN202221625346.7U CN202221625346U CN218098073U CN 218098073 U CN218098073 U CN 218098073U CN 202221625346 U CN202221625346 U CN 202221625346U CN 218098073 U CN218098073 U CN 218098073U
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Abstract
The application discloses temperature detection circuit and earphone storehouse of charging. The temperature detection circuit includes: the temperature detection unit is used for changing the resistance value of the temperature detection unit according to the change of the temperature; the processor comprises a signal output end and a signal sampling end, wherein the signal output end is used for outputting a detection signal, the signal sampling end is used for receiving a sampling signal, and the signal sampling end is connected with the temperature detection unit; one end of the first voltage division unit is connected with the signal output end, and the other end of the first voltage division unit is connected with the signal sampling end; one end of the second voltage division unit is connected with the signal sampling end, and the other end of the second voltage division unit is grounded. The detection signal is divided by the second voltage division unit, when the temperature detection unit and the processor are connected abnormally, the second voltage division unit still divides the voltage of the detection signal, and therefore the connection abnormality is judged, and the abnormality is caused in the signal acquisition function of the processor.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a temperature detection circuit and an earphone charging bin.
Background
In the temperature detection circuit of the related art, a signal sampling port of a processor is connected with a temperature detection unit, and then a signal output port of the processor is connected with a resistor in series and then is connected with the temperature detection unit, so that the temperature detection function is completed. However, when the temperature detection is abnormal, it cannot be specifically determined whether the connection between the temperature detection unit and the processor is abnormal or the signal acquisition function of the processor is abnormal.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a temperature detection circuit, which can judge whether the connection between a temperature detection unit and a processor is abnormal or the signal acquisition function of the processor is abnormal when the temperature detection is abnormal.
The application also provides an earphone charging bin with the temperature detection circuit.
The temperature detection circuit according to an embodiment of the first aspect of the present application includes: the temperature detection unit is used for changing the resistance value of the temperature detection unit according to the change of the temperature; the processor comprises a signal output end and a signal sampling end, wherein the signal output end is used for outputting a detection signal, the signal sampling end is used for receiving a sampling signal, and the signal sampling end is connected with the temperature detection unit; one end of the first voltage division unit is connected with the signal output end, and the other end of the first voltage division unit is connected with the signal sampling end; one end of the second voltage division unit is connected with the signal sampling end, and the other end of the second voltage division unit is grounded.
According to some embodiments of the application, the first voltage division unit comprises a first resistor, one end of the first resistor is connected with the signal output end, and the other end of the first resistor is connected with the signal sampling end.
According to some embodiments of the present application, the second voltage division unit includes a second resistor, one end of the second resistor is connected to the signal sampling terminal, and the other end of the second resistor is grounded.
According to some embodiments of the present application, the first resistor and the second resistor have the same resistance.
According to some embodiments of the present application, the temperature detection unit includes: one end of the NTC thermistor is connected with the signal sampling end, and the other end of the NTC thermistor is grounded.
According to some embodiments of the present application, the temperature detection circuit further comprises: and the filtering unit is connected with the signal sampling end and is used for filtering.
According to some embodiments of the present application, the filtering unit includes: the temperature detection circuit comprises a first capacitor and a third resistor, wherein one end of the first capacitor is connected with the signal sampling end, the other end of the first capacitor is grounded, one end of the third resistor is connected with the signal sampling end, and the other end of the third resistor is connected with the temperature detection unit.
The earphone charging chamber according to the second aspect embodiment of the present application comprises the temperature detection circuit of the first aspect embodiment described above.
According to temperature detection circuit and earphone storehouse of charging of this application embodiment, have following beneficial effect at least: carry out the partial pressure to detected signal through setting up the second partial pressure unit, when temperature detecting element and treater exist to be connected when unusual, the second partial pressure unit still can carry out the partial pressure to detected signal to make sampled signal change, it is unusual to judge that temperature detecting element and treater exist to be connected with this, still that the signal acquisition function of treater appears unusually, the maintenance personal of being convenient for maintains.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
FIG. 1 is a block diagram of a temperature detection circuit according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a temperature detection circuit according to an embodiment of the present application;
fig. 3 is a circuit diagram of a temperature detection circuit according to another embodiment of the present application.
Reference numerals:
A filtering unit 500, a signal output terminal 210, and a signal sampling terminal 220.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
In the temperature detection circuit of the related art, a signal sampling port of a processor is connected with a temperature detection unit, and then a signal output port of the processor is connected with a resistor in series and then is connected with the temperature detection unit, so that the temperature detection function is completed. In general, a signal sampling port of the processor is connected to an external temperature detection unit through a lead, and a signal output port is connected to the signal sampling port through a resistor and connected to the lead. Under the condition that the lead and the temperature detection unit are interrupted, the signal output by the signal output port is still transmitted to the signal sampling port through the resistor. For example, when the signal output by the signal output port is 0xFFF, the signal collected by the processor is also 0xFFF under the condition that the lead and the temperature detection unit are interrupted, however, when the signal sampling function inside the processor is abnormal, the signal sampling port may also obtain the sampling value of 0xFFF, which results in that the processor cannot distinguish whether the lead connection is interrupted or the signal sampling function is abnormal.
Based on this, the present application proposes a temperature detection circuit, including: the temperature detection unit 100, the processor 200, the first voltage division unit 300, and the second voltage division unit 400, wherein the temperature detection unit 100 is configured to change a resistance value thereof according to a change in temperature; the processor 200 includes a signal output end 210 and a signal sampling end 220, the signal output end 210 is used for outputting a detection signal, the signal sampling end 220 is used for receiving a sampling signal, and the signal sampling end 220 is connected to the temperature detection unit 100; one end of the first voltage division unit 300 is connected to the signal output end 210, and the other end of the first voltage division unit 300 is connected to the signal sampling end 220; one end of the second voltage division unit 400 is connected to the signal sampling terminal 220, and the other end of the second voltage division unit 400 is grounded.
As a specific example, in the temperature detection circuit of the present application, the temperature detection unit 100 is a thermistor provided on the battery to detect a change in the temperature of the battery. The signal output end 210 port of the processor 200 is used for outputting a high-level detection signal, the detection signal is divided by the first voltage dividing unit 300 and then applied to the second voltage dividing unit 400 and the temperature detection unit 100, the resistance value of the temperature detection unit 100 changes along with the change of the temperature, correspondingly, the sampling signal received by the signal sampling end 220 also changes, and the processor 200 can obtain the current temperature according to the value of the obtained sampling signal and the temperature characteristic resistance value table stored inside.
When the connection between the temperature detection unit 100 and the signal sampling terminal 220 of the processor 200 is interrupted, the detection signal output by the signal output terminal 210 is applied to the first voltage dividing unit 300 and the second voltage dividing unit 400, respectively, and therefore the sampling signal received by the signal sampling terminal 220 is a signal divided by the second voltage dividing unit 400 and is different from the detection signal output by the signal output terminal 210 of the processor 200. When the temperature acquisition function is abnormal, the sampling value obtained by sampling the signal is detected, so that whether the connection between the temperature detection unit 100 and the processor 200 is abnormal or the signal acquisition function of the processor 200 is abnormal can be judged. In an exemplary embodiment, the detection signal output by the signal output end 210 of the processor 200 is 0xFFF, the first voltage dividing unit 300 and the second voltage dividing unit 400 are the same, when the connection between the temperature detection unit 100 and the signal sampling end 220 of the processor 200 is interrupted, after voltage division, the sampling value acquired by the signal sampling end 220 is 2046, and when the processor 200 detects the sampling value for a long time, the connection between the temperature detection unit 100 and the processor 200 can be determined to be interrupted. When the signal sampling function of the processor 200 is abnormal, the signal sampling terminal 220 will obtain the sampling value of 0xFFF for a long time. Through the arrangement of the embodiment of the application, the processor 200 can determine whether the connection between the temperature detection unit 100 and the processor 200 is abnormal or the signal acquisition function of the processor 200 is abnormal when the temperature detection is abnormal.
In some embodiments, referring to fig. 2, the first voltage dividing unit 300 includes a first resistor R1, one end of the first resistor R1 is connected to the signal output terminal 210, and the other end of the first resistor R1 is connected to the signal sampling terminal 220. Pin 1 of the processor 200 is a signal output terminal 210, and pin 2 of the processor 200 is a signal sampling terminal 220. In some other embodiments, the first voltage dividing unit 300 may also use a plurality of resistors connected in series, in parallel, or use other devices with resistance values to divide the voltage.
In some embodiments, the second voltage dividing unit 400 includes a second resistor R2, one end of the second resistor R2 is connected to the signal sampling terminal 220, and the other end of the second resistor R2 is grounded. In some other embodiments, the second voltage dividing unit 400 may also use a plurality of resistors connected in series, in parallel, or use other devices with resistance values to divide the voltage.
In some embodiments, the first resistor R1 and the second resistor R2 have the same resistance. In the embodiment of the present application, the first resistor R1 and the second resistor R2 have the same resistance, and therefore the divided voltages thereof are also the same. For example, the resistance values of the first resistor R1 and the second resistor R2 may be 100K ohms, which facilitates calculation of the divided voltage.
In some embodiments, the temperature detection unit 100 includes: one end of the NTC thermistor NTC1 is connected with the signal sampling end 220, and the other end of the NTC thermistor NTC1 is grounded. An NTC (Negative Temperature Coefficient) thermistor is a resistor which is made of a material with a Negative Temperature Coefficient and the resistance of which decreases exponentially with the Temperature rise, and can be used in the fields of Temperature measurement, temperature control, temperature compensation and the like. In some other embodiments, a positive temperature coefficient thermistor may also be used for temperature detection.
Some embodiments, referring to fig. 3, the temperature detection circuit further comprises: the filtering unit 500, the filtering unit 500 is connected to the signal sampling terminal 220, and the filtering unit 500 is used for filtering.
In some embodiments, the filtering unit 500 includes: the temperature detection circuit comprises a first capacitor C1 and a third resistor R3, wherein one end of the first capacitor C1 is connected with a signal sampling end 220, the other end of the first capacitor C1 is grounded, one end of the third resistor R3 is connected with the signal sampling end 220, and the other end of the third resistor R3 is connected with the temperature detection unit 100. According to the method and the device, the alternating current components in the sampling signals are filtered by RC filtering, and the accuracy of AD sampling is improved.
In some embodiments, the present application further provides an earphone charging chamber, including the temperature detection circuit in the above embodiments. The temperature detection unit 100 in the temperature detection circuit of the embodiment of the application is connected with the battery of the earphone charging bin, and is used for detecting the temperature change of the battery and preventing the battery from overheating. Through setting up second partial pressure unit 400 and carrying out the partial pressure to detected signal, when temperature detecting element 100 exists with treater 200 and is connected unusually, second partial pressure unit 400 still can carry out the partial pressure to detected signal to make sampled signal change, with this judgement temperature detecting element 100 exists with treater 200 and is connected unusually, still that the signal acquisition function of treater 200 appears unusually, the maintenance personal of being convenient for maintains.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (8)
1. A temperature sensing circuit, comprising:
the temperature detection unit is used for changing the resistance value of the temperature detection unit according to the change of the temperature;
the processor comprises a signal output end and a signal sampling end, the signal output end is used for outputting a detection signal, the signal sampling end is used for receiving a sampling signal, and the signal sampling end is connected with the temperature detection unit;
one end of the first voltage division unit is connected with the signal output end, and the other end of the first voltage division unit is connected with the signal sampling end;
and one end of the second voltage division unit is connected with the signal sampling end, and the other end of the second voltage division unit is grounded.
2. The temperature detecting circuit according to claim 1, wherein the first voltage dividing unit includes a first resistor, one end of the first resistor is connected to the signal output terminal, and the other end of the first resistor is connected to the signal sampling terminal.
3. The temperature detection circuit according to claim 2, wherein the second voltage divider unit includes a second resistor, one end of the second resistor is connected to the signal sampling terminal, and the other end of the second resistor is grounded.
4. The temperature sensing circuit of claim 3, wherein the first resistor and the second resistor have the same resistance.
5. The temperature detection circuit according to claim 1, wherein the temperature detection unit includes: one end of the NTC thermistor is connected with the signal sampling end, and the other end of the NTC thermistor is grounded.
6. The temperature detection circuit according to any one of claims 1 to 5, further comprising: and the filtering unit is connected with the signal sampling end and is used for filtering.
7. The temperature detection circuit according to claim 6, wherein the filter unit includes: the temperature detection circuit comprises a first capacitor and a third resistor, wherein one end of the first capacitor is connected with the signal sampling end, the other end of the first capacitor is grounded, one end of the third resistor is connected with the signal sampling end, and the other end of the third resistor is connected with the temperature detection unit.
8. An ear charging magazine comprising a temperature sensing circuit as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221625346.7U CN218098073U (en) | 2022-06-27 | 2022-06-27 | Temperature detection circuit and earphone storehouse of charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221625346.7U CN218098073U (en) | 2022-06-27 | 2022-06-27 | Temperature detection circuit and earphone storehouse of charging |
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| Publication Number | Publication Date |
|---|---|
| CN218098073U true CN218098073U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221625346.7U Active CN218098073U (en) | 2022-06-27 | 2022-06-27 | Temperature detection circuit and earphone storehouse of charging |
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| CN (1) | CN218098073U (en) |
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- 2022-06-27 CN CN202221625346.7U patent/CN218098073U/en active Active
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