CN217820782U - On-off state detection circuit - Google Patents
On-off state detection circuit Download PDFInfo
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- CN217820782U CN217820782U CN202222052428.3U CN202222052428U CN217820782U CN 217820782 U CN217820782 U CN 217820782U CN 202222052428 U CN202222052428 U CN 202222052428U CN 217820782 U CN217820782 U CN 217820782U
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Abstract
The utility model relates to a circuit detects technical field, especially relates to an on-off state detection circuitry, include first resistance, second resistance, wait to detect unit and bus unit, bus unit with the one end of first resistance with the one end of second resistance is parallelly connected, the other end of second resistance with the one end of waiting to detect the unit is connected, wait to detect the unit the other end with the other end ground connection of first resistance, the resistance condition when the circuit through this application can directly transmit the heater break-make through the USB interface and change the attitude to judge the heater quality. The detection need not to dismantle after the finished product is complete, need not extra power supply, and the simple operation realizes easily, has improved the detection efficiency of disposable atomizer.
Description
Technical Field
The application relates to the technical field of circuit detection, in particular to an on-off state detection circuit.
Background
In the process of manufacturing electronic products, the on-off state of a circuit of a working element inside the electronic product needs to be detected so as to reduce the reject ratio of finished products and ensure the quality of the finished products. And the on-off detection of the circuit requires that the element is powered, i.e. forced to be in operation.
The on-off state detection of the above-mentioned elements is generally performed before the finished product is finished, and after the finished product, particularly, for some elements requiring the inspection of the working state by means of auxiliary materials, the state detection is generally not performed before the factory shipment due to the requirements on the production efficiency and tidiness. For example, in the preparation process of a disposable atomized product, the conventional on-off detection of the heating wire generally requires the matching of tobacco tar, the heating wire is electrified and then is observed to determine whether the tobacco tar is discharged, and then the on-off state of the heating wire element in the product is detected, however, the oil injection of the disposable atomized product can influence the factory sale of the disposable atomized product. Therefore, a circuit for detecting the on/off state of the internal components of the finished product is needed.
Disclosure of Invention
In view of the above, the present application is made to provide an on-off state detection circuit that overcomes or at least partially solves the above mentioned problems.
An on-off state detection circuit comprises a first resistor, a second resistor, a unit to be detected and a bus unit, wherein the bus unit is connected with one end of the first resistor and one end of the second resistor in parallel, the other end of the second resistor is connected with one end of the unit to be detected, and the other end of the unit to be detected and the other end of the first resistor are grounded;
when the resistance value acquired by the bus unit is the resistance value of the first resistor, the unit to be detected is in an open circuit state; and when the resistance value acquired by the bus unit is the resistance value of the parallel resistor of the first resistor and the second resistor, the unit to be detected is in a pass state.
Preferably, the bus unit includes a USB interface, the USB interface includes a CC2 pin, a GND pin, and a VBUS pin, wherein the CC2 pin is electrically connected to the first resistor and the second resistor, respectively, and the GND pin is grounded.
Preferably, the unit to be detected is a heating wire.
Preferably, the circuit further includes a third resistor, the USB interface further includes a CC1 pin, the CC1 pin is connected to one end of the third resistor, and the other end of the third resistor is grounded.
Preferably, the circuit further comprises a sensing unit and a processing unit, a signal input end of the processing unit is connected with a signal output end of the sensing unit, a switch is arranged between the second resistor and the heating wire, and an AT pin of the processing unit is connected with a control end of the switch to control the second resistor and the heating wire to be switched on and off.
Preferably, the circuit further comprises a conversion unit, an input terminal of the conversion unit is connected to the VBUS pin of the USB interface, and an output terminal of the conversion unit is connected to the VCC pin of the processing unit.
Preferably, the circuit further comprises an indication unit, one end of the indication unit is connected with the LED pin of the processing unit, and the other end of the indication unit is grounded.
Preferably, the circuit further includes a power supply unit, one end of the power supply unit is connected to the VDD pin of the processing unit, and the other end of the power supply unit is grounded.
Preferably, the first resistor and the second resistor are patch resistors respectively.
The beneficial effect of this application:
the unit to be detected can be a heating wire in the disposable atomizer, the heating wire is connected with the second resistor and the bus unit in series, if the resistance value acquired by the normal path of the heating wire is the resistance value of the parallel resistor formed by the second resistor and the first resistor, otherwise, the resistance value acquired is the resistance value of the first resistor; the circuit can directly transmit the resistance condition of the heating wire in the on-off state through the USB interface so as to judge the quality of the heating wire. The detection need not to be dismantled after the finished product is complete to this application, need not extra power supply, and the simple operation realizes easily, has improved the detection efficiency of disposable atomizer.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the description of the present application will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an on-off state detection circuit in an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
An on-off state detection circuit is applied to detection of the on-off state of a resistance wire of a disposable atomizer, and comprises a first resistor R1, a second resistor R2, a unit to be detected and a bus unit as shown in figure 1 (part of conventional parts are omitted in a circuit diagram), wherein the bus unit is connected with one end of the first resistor R1 and one end of the second resistor R2 in parallel, the other end of the second resistor R2 is connected with one end of the unit to be detected, and the other end of the unit to be detected and the other end of the first resistor R1 are grounded;
when the resistance value acquired by the bus unit is the resistance value of the first resistor R1, the unit to be detected is in an open circuit state; and when the resistance value acquired by the bus unit is the resistance value of the parallel resistor of the first resistor R1 and the second resistor R2, the unit to be detected is in a pass state.
Through the on-off state detection circuit, the on-off state detection circuit comprises a first resistor R1, a second resistor R2, a unit to be detected and a bus unit, wherein the bus unit is connected with one end of the first resistor R1 and one end of the second resistor R2 in parallel, the other end of the second resistor R2 is connected with one end of the unit to be detected, the other end of the unit to be detected and the other end of the first resistor R1 are grounded, the unit to be detected and the first resistor R1 are grounded, then the first resistor R1, the second resistor R2 and a main circuit unit form a parallel circuit, the bus unit, the second resistor R2 and the unit to be detected form a series circuit, and when the unit to be detected is in an off state, the resistance value acquired through the bus unit is the resistance value of the first resistor R1; on the contrary, if the acquired resistance value is the resistance value of a parallel resistor formed by the first resistor R1 and the second resistor R2, the unit to be detected can be judged to be in a pass state; the on-off state of the unit to be detected can be detected through the acquired resistance value result.
Understandably, through the technical scheme, the unit to be detected can be a heating wire in the disposable atomizer, the heating wire is connected with the second resistor R2 and the bus unit in series, if the resistance value collected by the normal path of the heating wire is the resistance value of the parallel resistor formed by the second resistor R2 and the first resistor R1, otherwise, the resistance value collected is the resistance value of the first resistor R1.
Next, a further description will be made of the above-described one on-off state detection circuit by the following description.
In an embodiment of the present application, as shown in fig. 1, the bus unit includes a USB interface, and the USB interface includes a CC2 pin, a GND pin, and a VBUS pin, where the CC2 pin is electrically connected to the first resistor R1 and the second resistor R2, respectively, and the GND pin is grounded.
According to the technical scheme, the USB interface is used as a bus unit, and the resistance value of the unit to be detected in the on-state or off-state is transmitted through the CC2 pin of the USB interface.
This application is especially in disposable atomizer manufacturing aspect, and when disposable atomizer makes the back, can gather the resistance data of detecting the unit of detecting when the on-off state in the circuit through the USB interface after the circular telegram, also can be according to the size of resistance further detect the on-off condition of detecting the unit.
In an embodiment of the present invention, the unit to be detected is a heating wire HF1.
It should be noted that the resistance value of the heating wire is low when the heating wire is cooled, and the second resistor R2 is added to be connected with the heating wire in series to avoid the heating wire from being burned out due to overlarge instantaneous current.
Understandably, when the heating wire is in an open circuit, the resistance value transmitted and collected at the USB interface is the resistance value of R2; when the heating wire HF1 is connected, the resistance value transmitted and collected at the USB interface is the resistance value of the parallel resistor formed by the second resistor R2 and the first resistor R1, the total resistance value of the heating wire HF1 and the second resistor R2 is Rf, and the calculation formula of the resistance value of the parallel resistor is (R2 x Rf)/(R2 + Rf).
That is, the on-off state of the heater HF1 can be detected by acquiring different resistance values.
In an embodiment of the present application, the circuit further includes a third resistor R3, the USB interface further includes a CC1 pin, the CC1 pin is connected to one end of the third resistor R3, and the other end of the third resistor is grounded.
The third resistor R3 mainly plays a role of limiting the current of the USB interface.
In an embodiment of the application, the circuit further includes a sensing unit M1 and a processing unit U1, a signal input end of the processing unit U1 is connected with a signal output end of the sensing unit M1, a switch is arranged between the second resistor R2 and the heating wire HF1, and an AT pin of the processing unit U1 is connected with a control end of the switch to control on/off of the second resistor R2 and the heating wire HF1.
It should be noted that the sensing unit M1 is a conventional microphone, and when the microphone senses external potential energy to generate a control signal and transmit the control signal to the processing unit U1, the processing unit U1 controls the switch path according to the control signal, so that R2 is communicated with the heater FH 1.
In an embodiment of the present application, the above circuit further includes a conversion unit U2, an input end of the conversion unit U2 is connected to the VBUS pin of the USB interface, and an output end of the conversion unit U2 is connected to the VCC pin of the processing unit U1.
The conversion unit U2 in the technical scheme can perform voltage conversion and voltage stabilization on the whole circuit.
In an embodiment of the present application, the circuit further includes an indication unit, one end of the indication unit is connected to the LED pin of the processing unit U1, and the other end of the indication unit is grounded.
The indication means can display the state of the heater circuit.
In an embodiment of the present application, the circuit further includes a power supply unit BT1, where one end of the power supply unit BT1 is connected to the VDD pin of the processing unit U1, and the other end thereof is grounded.
In an embodiment of the present application, to save space, the first resistor R1 and the second resistor R2 are patch resistors, respectively.
The circuit can directly transmit the resistance condition of the heating wire in the on-off state through the USB interface so as to judge the quality of the heating wire. The detection need not to dismantle after the finished product is complete, need not extra power supply, and the simple operation realizes easily, has improved the detection efficiency of disposable atomizer.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the true scope of the embodiments of the present application.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising one of \ 8230; \8230;" does not exclude the presence of additional like elements in a process, method, article, or terminal device that comprises the element.
The on-off state detection circuit provided by the present application is introduced in detail, and a specific example is applied in the present application to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (9)
1. An on-off state detection circuit is characterized by comprising a first resistor, a second resistor, a unit to be detected and a bus unit, wherein the bus unit is connected with one end of the first resistor and one end of the second resistor in parallel, the other end of the second resistor is connected with one end of the unit to be detected, and the other end of the unit to be detected and the other end of the first resistor are grounded;
when the resistance value acquired by the bus unit is the resistance value of the first resistor, the unit to be detected is in an open circuit state; and when the resistance value acquired by the bus unit is the resistance value of the parallel resistor of the first resistor and the second resistor, the unit to be detected is in a path state.
2. The circuit of claim 1, wherein the bus unit comprises a USB interface, and wherein the USB interface comprises a CC2 pin, a GND pin, and a VBUS pin, wherein the CC2 pin is electrically connected to the first resistor and the second resistor, respectively, and the GND pin is grounded.
3. The circuit of claim 2, wherein the unit to be tested is a heater.
4. The circuit of claim 2, further comprising a third resistor, wherein the USB interface further comprises a CC1 pin, wherein the CC1 pin is connected to one end of the third resistor, and wherein the other end of the third resistor is connected to ground.
5. The circuit according to claim 3, further comprising a sensing unit and a processing unit, wherein a signal input end of the processing unit is connected with a signal output end of the sensing unit, a switch is arranged between the second resistor and the heating wire, and an AT pin of the processing unit is connected with a control end of the switch to control on/off of the second resistor and the heating wire.
6. The circuit of claim 5, further comprising a conversion unit, wherein an input terminal of the conversion unit is connected to the VBUS pin of the USB interface, and an output terminal of the conversion unit is connected to the VCC pin of the processing unit.
7. The circuit of claim 5, further comprising an indication unit, wherein one end of the indication unit is connected to the LED pin of the processing unit, and the other end of the indication unit is grounded.
8. The circuit of claim 5, further comprising a power supply unit, wherein one end of the power supply unit is connected to the VDD pin of the processing unit, and the other end of the power supply unit is grounded.
9. The circuit of claim 1, wherein the first and second resistors are each a chip resistor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022209879654 | 2022-04-26 | ||
| CN202220987965 | 2022-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217820782U true CN217820782U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222052428.3U Active CN217820782U (en) | 2022-04-26 | 2022-08-04 | On-off state detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217820782U (en) |
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- 2022-08-04 CN CN202222052428.3U patent/CN217820782U/en active Active
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