CN207181561U

CN207181561U - A kind of intelligent combined-voltage output instrument

Info

Publication number: CN207181561U
Application number: CN201721186630.8U
Authority: CN
Inventors: 雷震
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-16
Filing date: 2017-09-16
Publication date: 2018-04-03
Anticipated expiration: 2027-09-16

Abstract

The utility model discloses a kind of intelligent combined-voltage output instrument,LCD test circuit modules include the power-factor correction device being connected with AC/DC switching power circuits,The electric current constant-current circuit being connected with power-factor correction device,The voltage control circuit being connected with electric current constant-current circuit and the first output circuit being connected with voltage control circuit,LED test circuit modules include the dc chopper being connected with AC/DC switching power circuits,The constant-current circuit being connected with dc chopper,The Closed-loop Constant-current control circuit being connected with constant-current circuit,The second output circuit being connected with Closed-loop Constant-current control circuit and the polarity switching circuit being connected with the second output circuit,Single-chip microcomputer is connected with Closed-loop Constant-current control circuit and polarity switching circuit respectively,LCD/LED output select circuits and the 3rd output circuit being connected with LCD/LED output select circuits are additionally provided with instrument housing,LCD/LED output select circuits are connected with polarity switching circuit and the first output circuit respectively.The device has broad application prospects.

Description

A kind of intelligent combined-voltage output instrument

Technical field

Electrical measurement field of measuring techniques is the utility model is related to, specially a kind of intelligent combined-voltage output instrument.

Background technology

At present, existing tester can only detect the quality of the LED type backlight of electronic product, it is impossible to test electronic product CCFL, EEFL type backlight because in the market tester can not export ac high-voltage, to CCFL, EEFL class backlight The quality in source can not detect.In addition existing tester output DC voltage divides both positive and negative polarity, it requires that user is using When, the both positive and negative polarity of tested LED type backlight and electronic component can be distinguished, then the both positive and negative polarity of tester and measured object Both positive and negative polarity connects respectively, can just measure correct numerical value.So for the user using this product, the substantial amounts of time of waste And energy, cause to use upper inconvenience.

Utility model content

The purpose of this utility model is to provide a kind of intelligent combined-voltage output instrument, to solve in above-mentioned background technology The problem of proposition.

To achieve the above object, the utility model provides following technical scheme：A kind of intelligent combined-voltage output instrument, bag Instrument housing is included, AC/DC switching power circuits, LCD test circuit modules, LED test circuits are provided with the instrument housing Module and single-chip microcomputer, the power factor (PF) that the LCD test circuit modules include being connected with the AC/DC switching power circuits are rectified Positive device, the electric current constant-current circuit being connected with the power-factor correction device, the voltage control being connected with the electric current constant-current circuit Circuit and the first output circuit being connected with the voltage control circuit, the LED test circuit modules include and the AC/ The connected dc chopper of DC switching power circuits, the constant-current circuit being connected with the dc chopper and the constant-current circuit Connected Closed-loop Constant-current control circuit, the second output circuit being connected with the Closed-loop Constant-current control circuit and with described second The connected polarity switching circuit of output circuit, the single-chip microcomputer are electric with the Closed-loop Constant-current control circuit and polarity switching respectively Road is connected, be additionally provided with the instrument housing LCD/LED output select circuits and with the LCD/LED output select circuits phase The 3rd output circuit even, the LCD/LED output select circuits are electric with the polarity switching circuit and the first output respectively Road is connected, and the instrument housing is provided with the start button and select button of control voltage output instrument.

Further, the LED test circuit modules also include the protection circuit being connected with second output circuit.

Further, sample circuit is provided between the LCD/LED output select circuits and the 3rd output circuit, and it is described Sample circuit is connected with the single-chip microcomputer.

Further, the display being connected with the single-chip microcomputer is additionally provided with the instrument housing.

Further, the display is LED display.

Compared with prior art, the beneficial effects of the utility model are：Voltage output instrument in the utility model can root According to tested LED type backlight and the both positive and negative polarity of electronic component, the both positive and negative polarity for the output end voltage that can automatically switch, it is not necessary to use Family carries out the both positive and negative polarity identification of LED type backlight and electronic component, facility simple to operate；The utility model is also additional simultaneously CCFL, EEFL backlight test function, user can switch the test or progress for carrying out LED backlight quality according to demand The test and easy to carry of CCFL, EEFL backlight quality, therefore, the device has broad application prospects.

Brief description of the drawings

Fig. 1 is the top view of device in the utility model；

Fig. 2 is the principle flow chart of device in the utility model；

In reference：1- instrument housings；2-AC/DC switching power circuits；3- single-chip microcomputers；4- power-factor correction devices； 5- electric current constant-current circuits；6- voltage control circuits；The output circuits of 7- first；8- dc choppers；9- constant-current circuits；10- closed loops Constant-current control circuit；The output circuits of 11- second；12- polarity switching circuits；13-LCD/LED output select circuits；14- the 3rd is defeated Go out circuit；15- start buttons；16- select buttons；17- protection circuits；18- sample circuits；19- displays.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Fig. 1-2 is referred to, the utility model provides a kind of technical scheme：A kind of intelligent combined-voltage output instrument, including Instrument housing 1, AC/DC switching power circuits 2, LCD test circuit modules, LED test circuits are provided with the instrument housing 1 Module and single-chip microcomputer 3, the LCD test circuit modules include the power factor (PF) being connected with the AC/DC switching power circuits 2 Rectifier 4, the electric current constant-current circuit 5 being connected with the power-factor correction device 4, the electricity being connected with the electric current constant-current circuit 5 Pressure control circuit 6 and the first output circuit 7 being connected with the voltage control circuit 6, the LED test circuit modules include The dc chopper 8 that is connected with the AC/DC switching power circuits 2, the constant-current circuit 9 being connected with the dc chopper 8, with The connected Closed-loop Constant-current control circuit 10 of the constant-current circuit 9, the second output being connected with the Closed-loop Constant-current control circuit 10 Circuit 11 and the polarity switching circuit 12 being connected with second output circuit 11, the single-chip microcomputer 3 respectively with the closed loop Constant-current control circuit 10 and polarity switching circuit 12 are connected, and LCD/LED output select circuits are additionally provided with the instrument housing 1 13 and the 3rd output circuit 14 that is connected with the LCD/LED output select circuits 13, the LCD/LED output select circuits 13 are connected with the output circuit 7 of polarity switching circuit 12 and first respectively, and it is defeated that the instrument housing 1 is provided with control voltage Go out the start button 15 and select button 16 of instrument.

Further, the LED test circuit modules also include the protection circuit being connected with second output circuit 11 17；Protection circuit 17 can play a part of protecting whole device.

Further, sample circuit 18 is provided between the output circuit 14 of LCD/LED output select circuits 13 and the 3rd, And the sample circuit 18 is connected with the single-chip microcomputer 3.

Further, the display 19 being connected with the single-chip microcomputer 3 is additionally provided with the instrument housing 1；It is easy to whole Measurement parameter is shown.

Further, the display 19 is LED display.

Operation principle：In use, when 220V AC voltage is after AC/DC switching power circuits 2, conversion exports direct current Pressure, now, after direct current 300V voltages first pass around power-factor correction device 4, exports the ac high-voltage of certain frequency, then passes through Electric current constant-current circuit 5, it is constant current to make output current, then by voltage control circuit 6, and then controls output AC voltage Maximum, then connected with the first output circuit 7, export the ac high voltage of constant current and certain frequency, for test CCFL, EEFL backlight provide the ac high-voltage of constant electric current and certain frequency.Therefore, the voltage output instrument has wide Application prospect, be adapted to commercially promotion and application.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims

1. a kind of intelligent combined-voltage output instrument, including instrument housing（1）, it is characterised in that the instrument housing（1）Inside set It is equipped with AC/DC switching power circuits（2）, LCD test circuit modules, LED test circuit modules and single-chip microcomputer（3）, the LCD Test circuit module includes and the AC/DC switching power circuits（2）Connected power-factor correction device（4）And the power Factor correction device（4）Connected electric current constant-current circuit（5）And the electric current constant-current circuit（5）Connected voltage control circuit（6） And with the voltage control circuit（6）The first connected output circuit（7）, the LED test circuit modules include with it is described AC/DC switching power circuits（2）Connected dc chopper（8）And the dc chopper（8）Connected constant-current circuit（9）、 With the constant-current circuit（9）Connected Closed-loop Constant-current control circuit（10）And the Closed-loop Constant-current control circuit（10）Connected Second output circuit（11）And with second output circuit（11）Connected polarity switching circuit（12）, the single-chip microcomputer （3）Respectively with the Closed-loop Constant-current control circuit（10）And polarity switching circuit（12）It is connected, the instrument housing（1）It is interior to go back Provided with LCD/LED output select circuits（13）And with the LCD/LED output select circuits（13）The 3rd connected output electricity Road（14）, the LCD/LED output select circuits（13）Respectively with the polarity switching circuit（12）And first output circuit （7）It is connected, the instrument housing（1）It is provided with the start button of control voltage output instrument（15）And select button（16）.

A kind of 2. intelligent combined-voltage output instrument according to claim 1, it is characterised in that the LED test circuits Module also includes and second output circuit（11）Connected protection circuit（17）.

A kind of 3. intelligent combined-voltage output instrument according to claim 1, it is characterised in that the LCD/LED outputs Selection circuit（13）With the 3rd output circuit（14）Between be provided with sample circuit（18）, and the sample circuit（18）With the list Piece machine（3）It is connected.

A kind of 4. intelligent combined-voltage output instrument according to claim 1, it is characterised in that the instrument housing（1） On be additionally provided with and the single-chip microcomputer（3）Connected display（19）.

A kind of 5. intelligent combined-voltage output instrument according to claim 4, it is characterised in that the display（19）For LED display.