CN216285605U - Hair straightener test circuit and hair straightener test device - Google Patents
Hair straightener test circuit and hair straightener test device Download PDFInfo
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- CN216285605U CN216285605U CN202122692038.8U CN202122692038U CN216285605U CN 216285605 U CN216285605 U CN 216285605U CN 202122692038 U CN202122692038 U CN 202122692038U CN 216285605 U CN216285605 U CN 216285605U
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Abstract
The utility model provides a hair straightener test circuit and a hair straightener test device, wherein the hair straightener test circuit comprises a power input port, a power output port, a voltage mutual inductance circuit, an indicating circuit and a control circuit, when a tail turning poor test or a high-voltage insulation test is carried out, if the tail turning is in poor contact or poor insulation, a power end of the hair straightener generates spike voltage, the voltage mutual inductance circuit outputs a voltage signal to a signal processing circuit, the signal processing circuit judges a detection result according to the received voltage signal and controls the indicating circuit to output a corresponding indicating signal to inform a tester, the tail turning poor test and the high-voltage insulation test of the same circuit structure are completed, the test efficiency is improved, and the design cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of hair straighteners, and particularly relates to a hair straightener test circuit and a hair straightener test device.
Background
The hair straightener belongs to a hairdressing tool, which comprises two main bodies, a heat insulation box arranged on the main bodies, a heating panel, a plug-in unit, a tail rotating assembly connected to the rear end of the main bodies and the like, wherein the tail rotating assembly comprises a tail rotating seat, a positive plate, a negative plate and a power line connector, and the tail rotating assembly is connected with a power supply to enable the heating panel in the heat insulation box to generate heat, so that the hair straightening work is carried out.
Before the hair straightener leaves a factory, a tail turning poor test and a high-voltage insulation test need to be carried out, wherein the tail turning poor test is to shake the tail of the hair straightener to detect whether the tail of the hair straightener is in poor contact or not; the high-voltage insulation test is to switch in high voltage and confirm the insulation performance of the whole machine shell and internal electrical components.
In the prior art, the bad tail transferring test is usually performed by serially connecting bulbs in a test circuit, and the result of the bad tail transferring test is judged according to the brightness of the bulbs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hair straightener test circuit, and aims to solve the problem that the traditional poor tail turning test and high-voltage insulation test need to be carried out respectively by replacing the circuit, so that the test efficiency is low.
A first aspect of an embodiment of the present invention provides a hair straightener testing circuit, including:
a power input port for inputting an alternating current power supply;
a power output port for connecting a power port of the hair straightener to be measured;
the voltage mutual inductance circuit is connected in series with the power input port and the power output port and is used for outputting a voltage signal to the peak voltage mutual inductance generated by the hair straightener to be tested during tail turning poor test or high-voltage insulation test;
an indication circuit;
and the signal processing circuit is used for triggering and controlling the indicating circuit to display different indicating information corresponding to the test result representing the tail turning defect and the high-voltage insulation test result according to the magnitude of the voltage signal.
Optionally, the voltage transformer circuit includes a voltage transformer, a primary coil of the voltage transformer is connected to the power input port and the power output port, a first end of a secondary coil of the voltage transformer is connected to the signal processing circuit, and a second end of the secondary coil of the voltage transformer is grounded.
Optionally, the signal processing circuit comprises:
the voltage comparison circuit is connected with the voltage mutual inductance circuit and is used for comparing the voltage signal with a preset reference voltage and outputting a corresponding high-low level signal;
and the controller is used for triggering and controlling the indicating circuit to display different indicating information corresponding to the characterization tail turning poor test result and the high-voltage insulation test result according to the high-low level signals.
Optionally, the voltage comparison circuit comprises a first resistor, a second resistor and a comparator;
the first end of the first resistor is connected with a positive power supply end, the second end of the first resistor, the first end of the second resistor and the inverting input end of the comparator are interconnected, the positive phase input end of the comparator forms the signal input end of the voltage comparison circuit, and the output end of the comparator forms the signal output end of the voltage comparison circuit.
Optionally, the signal processing circuit further comprises:
and the level conversion circuit is connected between the voltage comparison circuit and the controller and is used for converting high and low level signals output by the voltage comparison circuit into high and low level signals in a preset voltage interval.
Optionally, the level shift circuit includes a third resistor, a fourth resistor, a fifth resistor, and an electronic switching tube;
the first end of the third resistor is connected with the positive power supply end, the second end of the third resistor, the first end of the fourth resistor and the output end of the comparator are interconnected, the second end of the fourth resistor is connected with the base electrode of the electronic switching tube, the collector electrode of the electronic switching tube and the first end of the fifth resistor are connected in common to form the signal output end of the level conversion circuit, the second end of the fifth resistor is connected with the positive power supply end, and the emitter electrode of the electronic switching tube is grounded.
Optionally, the indication circuit includes a display screen, and a plurality of signal terminals of the display screen are respectively connected to the signal terminal of the controller.
Optionally, the indication circuit further includes a buzzer and an indicator light, and the buzzer and the indicator light are respectively connected with the signal end of the controller.
Optionally, the hair straightener test circuit further comprises:
and the power supply conversion circuit is respectively connected with the power supply input port, the signal processing circuit and the indicating circuit, converts an input alternating current power supply into a working power supply and outputs the working power supply to the signal processing circuit and the indicating circuit.
A second aspect of an embodiment of the present invention provides a hair straightener testing device, comprising the hair straightener testing circuit as described above.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the hair straightener test circuit is connected with a hair straightener to be tested by arranging the voltage mutual inductance circuit, when tail turning poor test or high-voltage insulation test is carried out, if tail turning contact is poor or insulation is poor, the power end of the hair straightener can generate peak voltage, the voltage mutual inductance circuit outputs voltage signals to the signal processing circuit in a mutual inductance mode, the signal processing circuit judges a detection result according to the received voltage signals, the control indicating circuit outputs corresponding indicating signals to inform testers, tail turning poor test and high-voltage insulation test can be completed by the same circuit structure, test efficiency is improved, and design cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a first module structure provided in an embodiment of a hair straightener testing circuit of the present invention;
FIG. 2 is a schematic diagram of a second module structure provided in an embodiment of the hair straightener testing circuit of the present invention;
FIG. 3 is a schematic diagram of a first circuit structure provided by the hair straightener testing circuit according to the embodiment of the utility model;
FIG. 4 is a schematic diagram of a third module structure provided by the hair straightener testing circuit according to the embodiment of the utility model;
FIG. 5 is a schematic diagram of a second circuit structure provided by the hair straightener testing circuit according to the embodiment of the utility model;
fig. 6 is a schematic structural diagram of a fourth module provided in the hair straightener testing circuit according to the embodiment of the utility model.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
A first aspect of an embodiment of the present invention provides a hair straightener test circuit.
As shown in fig. 1, in the present embodiment, the hair straightener testing circuit includes:
a power input port AC _ IN for inputting an alternating current power supply;
the power output port AC _ OUT is used for connecting a power port of the hair straightener to be tested;
the voltage mutual inductance circuit 10 is connected IN series with the power input port AC _ IN and the power output port AC _ OUT, and the voltage mutual inductance circuit 10 is used for outputting a voltage signal by the mutual inductance of peak voltage generated when the hair straightener to be tested is subjected to a tail turning poor test or a high-voltage insulation test;
an indication circuit 20;
and the signal processing circuit 30 is respectively connected with the voltage mutual inductance circuit 10 and the indicating circuit 20, and the signal processing circuit 30 is used for triggering the indicating circuit 20 to display different indicating information corresponding to the characteristic tail turning poor test result and the high-voltage insulation test result according to the magnitude of the voltage signal.
IN this embodiment, the power input port AC _ IN, the voltage transformer circuit 10, and the power output port AC _ OUT form a power-on loop, and the power input port AC _ IN and the power output port AC _ OUT may be structures such as a metal contact and a socket, which facilitates the plugging test.
When the tail turning poor test is carried OUT on the hair straightener to be tested after leaving the factory, the power end of the hair straightener to be tested, namely the power plug, is inserted into the power output port AC _ OUT, the tail turning is shaken, when the tail turning test is poor, the metal piece in the hair straightener can generate electric sparks and spike voltage, the spike voltage is fed back to the voltage mutual inductance circuit 10 through the power plug of the hair straightener, and the mutual inductance output voltage signal of the voltage mutual inductance circuit 10 is output to the signal processing circuit 30.
When the tail rotation test is normal, the metal piece inside the hair straightener is normally contacted, no spark and no peak voltage are generated, the voltage mutual inductance circuit 10 does not sense the peak voltage, and no voltage signal is output.
Meanwhile, when a high-voltage insulation test is performed, if the shell of the hair straightener is not well insulated from the internal components, a peak voltage is generated between the shell and the internal components, the peak voltage is also fed back to the voltage transformer circuit 10 through the power plug of the hair straightener, and the voltage transformer circuit 10 outputs a voltage signal to the signal processing circuit 30 through mutual inductance.
When the high-voltage insulation test is normal, the insulation performance between the shell of the hair straightener and the internal components is good, no peak voltage is generated between the shell and the internal components, the voltage mutual inductance circuit 10 does not sense the peak voltage, and no voltage signal is output.
The signal processing circuit 30 determines the detection result according to the magnitude and/or presence of the received voltage signal, and controls the indicating circuit 20 to output a corresponding indicating signal to notify a tester, for example, display corresponding test information by characters, lights, or the like, or emit a corresponding sound to indicate a corresponding test result.
The voltage transformer circuit 10 converts high voltage into low voltage, and can bear high voltage generated during tail rotation poor test and high voltage insulation test, so that tail rotation poor test and high voltage insulation test can be completed through the same circuit structure during test, test efficiency is improved, and design cost is reduced.
Meanwhile, for the hair straightener to be measured, the power plug of the hair straightener is directly connected into the power socket, and the power consumption state of the hair straightener is not affected.
Wherein, the voltage mutual inductance circuit 10 can adopt voltage mutual inductors T1 with different turn ratios and corresponding peripheral components, alternatively, as shown IN fig. 3, the voltage transformer circuit 10 includes a voltage transformer T1, a primary coil of the voltage transformer T1 is connected to the power input port AC _ IN and the power output port AC _ OUT, respectively, a first end of a secondary coil of the voltage transformer T1 is connected to the signal processing circuit 30, a second end of the secondary coil of the voltage transformer T1 is grounded, the voltage transformer T1 performs high-voltage to low-voltage conversion, and can bear high voltage generated during tail-rotation failure test and high-voltage insulation test, and the peak voltage generated by poor rotor tail and poor high-voltage insulation can be mutually inducted to output a low-voltage signal, so that during testing, the tail rotating poor test and the high-voltage insulation test can be completed through the same circuit structure, so that the test efficiency is improved, and the design cost is reduced.
The signal processing circuit 30 may adopt a corresponding voltage processing circuit, an analog-to-digital conversion circuit, a processor, and the like, and the specific structure is not limited.
As shown in fig. 2, optionally, the signal processing circuit 30 includes:
the voltage comparison circuit 31 is connected with the voltage mutual inductance circuit 10, and the voltage comparison circuit 31 is used for comparing the voltage signal with a preset reference voltage and outputting a corresponding high-low level signal;
and the controller 32 is connected with the voltage comparison circuit 31, and the controller 32 is used for triggering the control indication circuit 20 to display different indication information corresponding to the characterization tail turning poor test result and the high-voltage insulation test result according to the high-low level signal.
In this embodiment, when the tail is turned poorly and the high-voltage insulation is poor, the voltage transformer T1 outputs a voltage signal of low voltage by mutual inductance to the generated spike voltage, the voltage comparison circuit 31 compares the voltage of the voltage signal, and converts the voltage signal into a corresponding high-low level signal, so as to realize an analog-to-digital conversion function, and the controller 32 determines the current test result according to the received high-low level signal, and controls the indication circuit 20 to output a corresponding indication signal to inform a tester.
The controller 32 may adopt a corresponding processing unit such as a single chip, a microprocessor, a central processing unit, etc., and the specific structure is not limited.
The voltage comparison circuit 31 may adopt a corresponding comparator U1 structure, as shown in fig. 3, and optionally, the voltage comparison circuit 31 includes a first resistor R1, a second resistor R2 and a comparator U1;
a first terminal of the first resistor R1 is connected to the positive power source terminal VCC, a second terminal of the first resistor R1, a first terminal of the second resistor R2, and an inverting input terminal of the comparator U1 are interconnected, a non-inverting input terminal of the comparator U1 constitutes a signal input terminal of the voltage comparison circuit 31, and an output terminal of the comparator U1 constitutes a signal output terminal of the voltage comparison circuit 31.
The first resistor R1 and the second resistor R2 form a resistor voltage dividing circuit, divide the voltage output by the positive power supply terminal VCC and output a preset reference voltage value comparator U1, and the comparator U1 compares the voltage signal with the preset reference voltage to output a corresponding high-low level signal.
The preset reference voltage is also set according to requirements, the output high-low level signal is determined according to the set preset reference voltage and the set voltage signal, and the size of the preset reference voltage and the type of the output level signal are not particularly limited.
Meanwhile, in order to ensure that the controller 32 receives the level signal satisfying the operating condition, as shown in fig. 4, the signal processing circuit 30 optionally further includes:
and a level conversion circuit 33 connected between the voltage comparison circuit 31 and the controller 32, wherein the level conversion circuit 33 is used for converting the high-low level signal output by the voltage comparison circuit 31 into a high-low level signal in a preset voltage interval.
In this embodiment, the level shift circuit 33 may be an amplifier circuit, a level inverter circuit, or the like, and performs level shift on the high/low level signal output by the voltage comparison circuit 31, so as to output a high/low level signal in a preset voltage interval satisfying the operating condition of the controller 32.
As shown in fig. 5, optionally, the level shift circuit 33 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5 and an electronic switch Q1;
the first end of the third resistor R3 is connected with the positive power supply terminal VCC, the second end of the third resistor R3, the first end of the fourth resistor R4 and the output end of the comparator U1 are interconnected, the second end of the fourth resistor R4 is connected with the base of the electronic switch tube Q1, the collector of the electronic switch tube and the first end of the fifth resistor R5 are connected in common to form the signal output end of the level conversion circuit 33, the second end of the fifth resistor R5 is connected with the positive power supply terminal VCC, and the emitter of the electronic switch tube Q1 is grounded.
In this embodiment, the third resistor R3 and the fifth resistor R5 form a pull-up resistor, the fourth resistor R4 forms a current-limiting voltage-dividing resistor, the electronic switch Q1 forms a level inverting circuit, when the comparator U1 outputs a high level, the electronic switch Q1 is turned on and outputs a low level to the controller 32, when the comparator U1 outputs a low level, the fifth resistor R5 is pulled up and outputs a high level to the controller 32, the controller 32 determines a current test result according to the received high and low levels, and controls the indicating circuit 20 to output a corresponding indicating signal to notify a tester.
Optionally, the electronic switching tube Q1 is an NPN transistor, and the NPN transistor forms a level inverter circuit and also has a signal amplification function, and can perform proportional amplification on the level signal output by the comparator U1.
As shown in fig. 6, optionally, the indication circuit 20 includes a display screen 21, a plurality of signal terminals of the display screen 21 are respectively connected to the signal terminals of the controller 32, the controller 32 determines the current test result according to the received high and low levels, and controls the display screen 21 to display corresponding indication information to notify the tester, for example, to display the contents such as "pass test", "fail test", or the like, or the contents such as numerical values.
Meanwhile, in order to further improve the indication effect, as shown in fig. 6, optionally, the indication circuit 20 further includes a buzzer 22 and an indicator lamp 23, the buzzer 22 and the indicator lamp 23 are respectively connected to a signal end of the controller 32, the controller 32 determines the current test result according to the received high and low levels, and controls the display screen 21 to display corresponding indication information to inform the tester, and meanwhile, the buzzer 22 is controlled to emit a prompt sound, and the indicator lamp 23 is controlled to emit a corresponding color, so that the tester is more intuitively informed of the corresponding test result.
Referring to fig. 3 and 5, optionally, the hair straightener testing circuit further includes:
the power conversion circuit 40, the power conversion circuit 40 is respectively connected with the power input port AC _ IN, the signal processing circuit 30 and the indication circuit 20, and converts the input AC power into the working power and outputs the working power to the signal processing circuit 30 and the indication circuit 20.
In this embodiment, the power conversion circuit 40 is configured to provide corresponding working power supplies for the signal processing circuit 30 and the indication circuit 20, for example, provide a working voltage for a positive power source VCC of the voltage comparison circuit 31, provide a pull-up voltage for the level conversion circuit 33, provide a working power supply for the controller 32, and the like, so as to ensure normal test operation after each component is powered on.
The power conversion circuit 40 may adopt a structure such as a whole filter circuit, a voltage regulator circuit, etc., and the specific structure is not limited.
The present invention further provides a hair straightener testing apparatus, which includes a hair straightener testing circuit, and the specific structure of the hair straightener testing circuit refers to the above embodiments.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A hair straightener test circuit, comprising:
a power input port for inputting an alternating current power supply;
a power output port for connecting a power port of the hair straightener to be measured;
the voltage mutual inductance circuit is connected in series with the power input port and the power output port and is used for outputting a voltage signal to the peak voltage mutual inductance generated by the hair straightener to be tested during tail turning poor test or high-voltage insulation test;
an indication circuit;
and the signal processing circuit is used for triggering and controlling the indicating circuit to display different indicating information corresponding to the test result representing the tail turning defect and the high-voltage insulation test result according to the magnitude of the voltage signal.
2. The hair straightener test circuit of claim 1, wherein the voltage transformer circuit comprises a voltage transformer, a primary coil of the voltage transformer is connected with the power input port and the power output port respectively, a first end of a secondary coil of the voltage transformer is connected with the signal processing circuit, and a second end of the secondary coil of the voltage transformer is grounded.
3. The hair straightener test circuit of claim 1, wherein the signal processing circuit comprises:
the voltage comparison circuit is connected with the voltage mutual inductance circuit and is used for comparing the voltage signal with a preset reference voltage and outputting a corresponding high-low level signal;
and the controller is used for triggering and controlling the indicating circuit to display different indicating information corresponding to the characterization tail turning poor test result and the high-voltage insulation test result according to the high-low level signals.
4. The hair straightener test circuit of claim 3, wherein the voltage comparison circuit comprises a first resistor, a second resistor and a comparator;
the first end of the first resistor is connected with a positive power supply end, the second end of the first resistor, the first end of the second resistor and the inverting input end of the comparator are interconnected, the positive phase input end of the comparator forms the signal input end of the voltage comparison circuit, and the output end of the comparator forms the signal output end of the voltage comparison circuit.
5. The hair straightener test circuit of claim 4, wherein the signal processing circuit further comprises:
and the level conversion circuit is connected between the voltage comparison circuit and the controller and is used for converting high and low level signals output by the voltage comparison circuit into high and low level signals in a preset voltage interval.
6. The hair straightener test circuit of claim 5, wherein the level shift circuit comprises a third resistor, a fourth resistor, a fifth resistor and an electronic switching tube;
the first end of the third resistor is connected with the positive power supply end, the second end of the third resistor, the first end of the fourth resistor and the output end of the comparator are interconnected, the second end of the fourth resistor is connected with the base electrode of the electronic switching tube, the collector electrode of the electronic switching tube and the first end of the fifth resistor are connected in common to form the signal output end of the level conversion circuit, the second end of the fifth resistor is connected with the positive power supply end, and the emitter electrode of the electronic switching tube is grounded.
7. The hair straightener test circuit of claim 3, wherein the indication circuit comprises a display screen, a plurality of signal terminals of the display screen are respectively connected with the signal terminals of the controller.
8. The hair straightener test circuit of claim 7, wherein the indication circuit further comprises a buzzer and an indicator light, the buzzer and the indicator light are respectively connected with the signal terminal of the controller.
9. The hair straightener test circuit of any one of claims 1 to 8, wherein the hair straightener test circuit further comprises:
and the power supply conversion circuit is respectively connected with the power supply input port, the signal processing circuit and the indicating circuit, converts an input alternating current power supply into a working power supply and outputs the working power supply to the signal processing circuit and the indicating circuit.
10. A hair straightener testing device, characterized in that it comprises a hair straightener testing circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692038.8U CN216285605U (en) | 2021-11-04 | 2021-11-04 | Hair straightener test circuit and hair straightener test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692038.8U CN216285605U (en) | 2021-11-04 | 2021-11-04 | Hair straightener test circuit and hair straightener test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216285605U true CN216285605U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122692038.8U Active CN216285605U (en) | 2021-11-04 | 2021-11-04 | Hair straightener test circuit and hair straightener test device |
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| Country | Link |
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| CN (1) | CN216285605U (en) |
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2021
- 2021-11-04 CN CN202122692038.8U patent/CN216285605U/en active Active
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