CN105444867A - Electronic weight meter - Google Patents
Electronic weight meter Download PDFInfo
- Publication number
- CN105444867A CN105444867A CN201510981498.9A CN201510981498A CN105444867A CN 105444867 A CN105444867 A CN 105444867A CN 201510981498 A CN201510981498 A CN 201510981498A CN 105444867 A CN105444867 A CN 105444867A
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- CN
- China
- Prior art keywords
- key group
- coupled
- lead
- out terminal
- clock signal
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/007—Integrated arrangements for generating electrical power, e.g. solar cells
Abstract
The invention provides an electronic weight meter. The electronic weight meter includes a scale tray and an operation machine; the operation machine comprises a display screen connected with a power source, a control key group connected with the power source and the display screen, an article key group which is connected with the control key group, a digital key group connected with the control key group and the article key group, and the power source. According to the electronic weight meter provided by the invention, the power source has very high conversion efficiency, it only needs one to two dry batteries to realize power supply for the system, and therefore, the size and weight of the electronic scale can be greatly reduced, and a portable design can be realized.
Description
Technical field
The present invention relates to appliance and electronic field, particularly a kind of electronic weighing scale.
Background technology
Electronic scales is seen everywhere in people's daily life.Such as, at the supermarket, the place such as fruit shop all needs to use electronic scales to weigh article.Local at these, type of goods is various, and existing electronic scales volume is large, and weight is at 2-3 kilogram, and its volume and weight, primarily of shared by battery, often needs 4-6 batteries could meet needs of powering.
How providing the electronic scales that a kind of battery volume is little and energy-conservation again, is current problem demanding prompt solution.
Summary of the invention
The present invention proposes a kind of electronic weighing scale, solves that existing electronic weighing scale volume is large, the problem of Heavy Weight.
Technical scheme of the present invention is achieved in that
A kind of electronic weighing scale, comprises the scale pan; And manipulator, described manipulator comprises power supply; Display screen, described display screen is connected to described power supply; Operating key group, described operating key group is connected to described power supply and described display screen; Article key group, described article key group is connected to described operating key group; And numerical key group, described numerical key group is connected to described operating key group and described article key group;
Power supply, comprising: input port, receives input voltage;
Output port, provides output voltage;
Input inductor and the first power switch, be coupled in series between input port and reference ground;
Second power switch, is coupled between the coupled in series node of the first power switch and input inductor and output port;
Output capacitor, is coupled between output port and reference ground;
Feedback component, is coupled to output port and receives output voltage, and produce the feedback voltage of reflection output voltage;
Error amplifier, has in-phase input end, inverting input and lead-out terminal, and its inverting input receives reference voltage, and its in-phase input end is coupled to feedback component and receives feedback voltage, and its lead-out terminal produces error amplification signal;
Clamper, is coupled between the lead-out terminal of error amplifier and reference ground;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and the lead-out terminal that its inverting input is coupled to error amplifier receives error amplification signal, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides sawtooth signal to the in-phase input end of frequency comparator based on clock signal;
Control and driving circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce double switch drive singal, to control the break-make of the first power switch and the second power switch.
Alternatively, described numerical key group comprises 0 to 90 number of words.
Alternatively, described operating key group comprises multiplication key button, accumulation key button, zero key button and switch key button.
Alternatively, described article key group comprises m × n key button, and wherein, m and n is positive integer;
The invention has the beneficial effects as follows:
(1) power supply has very high conversion efficiency, the power supply only needing 1-2 to save dry cell can to realize system;
(2) substantially reduce the volume and weight of electronic scales, achieve portability design.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the perspective view of a kind of electronic weighing scale of the present invention embodiment;
Fig. 2 is the electrical block diagram of electronic weighing scale shown in Fig. 1;
Fig. 3 is the circuit diagram of power supply shown in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the perspective view of a kind of electronic weighing scale of the present invention embodiment.As shown in Figure 1, electronic weighing scale 1 comprises the scale pan 2 and manipulator 3.Manipulator 3 comprises article key group 4, display screen 5, numerical key group 6 and operating key group 7.Article key group 4 comprises m × n key button, and wherein, m and n is positive integer.Before use, utilize numerical key group 6 and operating key group 7 to operate, in each key button in article key group 4, pre-enter article unit price.Then, on each key button, correspondingly stick the label with Item Title.Like this, in use, directly can press Item Title, it is weighed and calculates.In addition, manipulator 3 also comprises built-in power 100 (Fig. 1 is not shown).
When shop article is changed, certain key button in numerical key group 6 and operating key group 7 pairs of article key groups 4 can be utilized to change, can also to all key button reset alls.
Fig. 2 is the electrical block diagram of electronic weighing scale shown in Fig. 1.As shown in Figure 2, electronic weighing scale circuit C comprises and article key group 4, display screen 5, numerical key group 6 and the operating key group 7 corresponding to electronic weighing scale 1 shown in Fig. 1.In addition, electronic weighing scale electrical equipment C also comprises power supply 100.Power supply 100 is connected to display screen 5 and operating key group 7 thinks that it provides working power.Operating key group 7 is connected to display screen 5 to control its display effect.In addition, operating key group 7 is also connected to article key group 4 and numerical key group 6 to control its operation.Numerical key group 6 is also connected to article key group 4 to input article key group and to change operation.
Fig. 3 is the circuit diagram of power supply in Fig. 1, and power supply 100 comprises: input port 101, receives input voltage vin; Output port 102, provides output voltage Vo; Input inductor 103 and the first power switch 104, be coupled in series between input port 101 and reference ground; Second power switch 105, between the coupled in series node being coupled in the first power switch 104 and input inductor 103 and output port 102; Output capacitor 106, is coupled between output port 102 and reference ground; Feedback component 107, is coupled to output port 102 and receives output voltage Vo, and produces the feedback voltage Vfb of reflection output voltage Vo; Error amplifier 108, has in-phase input end, inverting input and lead-out terminal, and its inverting input receives reference voltage Vref, and its in-phase input end is coupled to feedback component 107 and receives feedback voltage Vfb, and its lead-out terminal produces error amplification signal Vc; Clamper 109, is coupled between the lead-out terminal of error amplifier 108 and reference ground; Frequency comparator 110, has in-phase input end, inverting input and lead-out terminal, and the lead-out terminal that its inverting input is coupled to error amplifier 108 receives error amplification signal Vc, and its lead-out terminal provides clock signal clk; Sawtooth generator 111, is coupled to the lead-out terminal receive clock signal CLK of frequency comparator 110, and provides sawtooth signal Vsw to the in-phase input end of frequency comparator 110 based on clock signal clk; Control and driving circuit 112, be coupled to the lead-out terminal receive clock signal CLK of frequency comparator 110, and based on clock signal clk, produce double switch drive singal, to control the break-make of the first power switch 104 and the second power switch 105.
In one embodiment, numerical key group comprises digital button 0 ~ 9.
In another embodiment, operating key group comprises multiplication key button, accumulation key button, zero key button and switch key button.
Utilize the electronic weighing scale that the present invention proposes, power supply has very high conversion efficiency, and the power supply only needing 1-2 to save dry cell can to realize system, substantially reduces the volume and weight of electronic scales, achieve portability design.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an electronic weighing scale, is characterized in that, comprising:
The scale pan; And
Manipulator, described manipulator comprises:
Display screen, described display screen is connected to described power supply;
Operating key group, described operating key group is connected to described power supply and described display screen;
Article key group, described article key group is connected to described operating key group; And
Numerical key group, described numerical key group is connected to described operating key group and described article key group;
Power supply, comprising: input port, receives input voltage;
Output port, provides output voltage;
Input inductor and the first power switch, be coupled in series between input port and reference ground;
Second power switch, is coupled between the coupled in series node of the first power switch and input inductor and output port;
Output capacitor, is coupled between output port and reference ground;
Feedback component, is coupled to output port and receives output voltage, and produce the feedback voltage of reflection output voltage;
Error amplifier, has in-phase input end, inverting input and lead-out terminal, and its inverting input receives reference voltage, and its in-phase input end is coupled to feedback component and receives feedback voltage, and its lead-out terminal produces error amplification signal;
Clamper, is coupled between the lead-out terminal of error amplifier and reference ground;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and the lead-out terminal that its inverting input is coupled to error amplifier receives error amplification signal, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides sawtooth signal to the in-phase input end of frequency comparator based on clock signal;
Control and driving circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce double switch drive singal, to control the break-make of the first power switch and the second power switch.
2. electronic weighing scale as claimed in claim 1, it is characterized in that, described numerical key group comprises 0 to 90 number of words.
3. electronic weighing scale as claimed in claim 1, is characterized in that, described operating key group comprises multiplication key button, accumulation key button, zero key button and switch key button.
4. electronic weighing scale as claimed in claim 1, it is characterized in that, described article key group comprises m × n key button, and wherein, m and n is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981498.9A CN105444867A (en) | 2015-12-24 | 2015-12-24 | Electronic weight meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981498.9A CN105444867A (en) | 2015-12-24 | 2015-12-24 | Electronic weight meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105444867A true CN105444867A (en) | 2016-03-30 |
Family
ID=55555330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510981498.9A Pending CN105444867A (en) | 2015-12-24 | 2015-12-24 | Electronic weight meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105444867A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0816811A2 (en) * | 1996-07-05 | 1998-01-07 | Yazaki Corporation | Dead weight display apparatus |
| CN202420652U (en) * | 2012-02-02 | 2012-09-05 | 倪晓旺 | Electronic scale with solar waterproof currency-detecting function |
| CN103051184A (en) * | 2012-12-12 | 2013-04-17 | 青岛联盟电子仪器有限公司 | Boosted circuit |
| CN103076075A (en) * | 2012-12-12 | 2013-05-01 | 青岛联盟电子仪器有限公司 | Electronic balance |
| CN103335700A (en) * | 2013-06-07 | 2013-10-02 | 孙征文 | High-precision weighing instrument based on digital signal processor (DSP) |
| CN204043777U (en) * | 2014-08-26 | 2014-12-24 | 王海冠 | A kind of electronic scale with portable power source function |
-
2015
- 2015-12-24 CN CN201510981498.9A patent/CN105444867A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0816811A2 (en) * | 1996-07-05 | 1998-01-07 | Yazaki Corporation | Dead weight display apparatus |
| EP0816811A3 (en) * | 1996-07-05 | 1998-10-28 | Yazaki Corporation | Dead weight display apparatus |
| CN202420652U (en) * | 2012-02-02 | 2012-09-05 | 倪晓旺 | Electronic scale with solar waterproof currency-detecting function |
| CN103051184A (en) * | 2012-12-12 | 2013-04-17 | 青岛联盟电子仪器有限公司 | Boosted circuit |
| CN103076075A (en) * | 2012-12-12 | 2013-05-01 | 青岛联盟电子仪器有限公司 | Electronic balance |
| CN103335700A (en) * | 2013-06-07 | 2013-10-02 | 孙征文 | High-precision weighing instrument based on digital signal processor (DSP) |
| CN204043777U (en) * | 2014-08-26 | 2014-12-24 | 王海冠 | A kind of electronic scale with portable power source function |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160330 |
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| WD01 | Invention patent application deemed withdrawn after publication |