CN2307286Y

CN2307286Y - Multifunctional valuation electronic scale

Info

Publication number: CN2307286Y
Application number: CN 97207882
Authority: CN
Inventors: 佘承业
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-21
Filing date: 1997-01-21
Publication date: 1999-02-10
Anticipated expiration: 2007-01-21

Abstract

The utility model provides a multifunctional valuation electronic scale, which has the functions of low power consumption, automatic calibration, and temperature compensation. The utility model comprises a casing body 6. The lower part of the casing body 6 is provided with four adjustable brackets 8. A panel on the plus side of the casing body 6 is provided with a keyboard 10 and a previous screen display panel 11. A panel on the rear side of the casing body 6 is provided with a rear screen display panel 9. The casing body 6 is provided with a sensor 3, a blister 7, accumulators 12, a power supply board 13, and a transformer 14 inside. A holding board 2 is connected with a sensor 3 and a supporting board 5 through screws 4. The holding board 2 is provided with a scale table panel 1. The circuit of the whole machine is composed of eight function blocks.

Description

Multi-functional electronic scale

The utility model relates to a kind of electronic scales, particularly a kind of electronic scale with low-power consumption, automatic demarcation, temperature compensation function.

Present electronic scale has polytype, and its display mode has three kinds in fluorescent, LED and liquid crystal, demarcates and adopts artificial toggle switch to set, and do not have the complete machine temperature compensation.Fluorescent display type operating voltage is higher in these electronic scaless, is not easy to powered battery, and power consumption is bigger, and brightness is the highest; The brightness of LED type is higher, and power consumption is bigger, and operating voltage is low; LCD type power consumption minimum, but be passive light emitting-type, when surrounding environment is dark, need backlight.In addition, demarcate to manually setting and adjust each way switch and reach and set full scale value, scale division value, its parameter efficient is low and be not easy to streamline and large-scale production, and manufacturability is relatively poor.Just do not have the complete machine temperature compensation again, ambient temperature changes to its measuring accuracy influence greatly, and is overproof easily.

The purpose of this utility model is the deficiency at existing electronic scales, is showing that aspects such as demarcating temperature compensation, entire machine design and assembly technology makes improvements, and makes it improving to some extent aspect complete machine performance, the power consumption and improving.

Technical solution of the present utility model is such: multi-functional electronic scale comprises a housing, lower part of frame is provided with four adjustable support legs, the positive side panel of housing is provided with keyboard and preceding screen display panel, the rear side panel of housing is provided with back screen display panel, is provided with sensor, bubble, accumulator, power panel and transformer in housing.Supporting plate joins by screw and support plate and sensor, and sensor is screwed in housing, and supporting plate is provided with the weighing platform panel.Circuitry is made up of eight functional blocks, and in circuitry, the front and rear panel display circuit is respectively 16 LED or LCD shows and driving circuit, shows five weight, five unit prices and six amount of money, adopts module serial connection mode to connect.Main control circuit is made up of special-purpose single chip microcomputer circuit and reset circuit, interface circuit, the operation of control total system.Keyboard circuit is that 20 4 * 5 strong matrix switches are formed, with the various functions of operating system.Power circuit is made up of alternating current-direct current commutation circuit and AC rectification and mu balanced circuit, supplies with complete machine and the required power supply of module.Modular circuit is a thick film circuit, comprises reference power supply, stabilized power source, parameter setting circuit, temperature inversion circuit and prime amplifier, A/C converter and low battery voltages testing circuit.

The multi-functional electronic scale that the utility model provides is being made significant improvement aspect the LDE demonstration, adopts the concatenation type display circuit, makes it when positive 5V powers, and power consumption reduces half than existing circuit.32 existing LED charactrons are divided into two groups of 16 display units, are connected in series with the power supply of 5V left and right sides power supply, rather than adopt usually supply with two groups of 16 LED demonstrations with the 5V power supply respectively, so power consumption can reduce half.Control circuit provides synchronous timesharing word line by micro computer, and bit line signal adds to upper and lower two groups of display circuits, reaches the purpose that shows weight, unit price, the amount of money simultaneously.Calibration Circuit adopts soft switch, by program setting, and carries out complete machine automatically and demarcates, and whole calibrating procedure can be finished by Automatic Program and promptly be suitable for streamline production, can avoid artificial operation error again.In a word, the Overall Power Consumption that adopts LED to show reduces half than common circuit, is particularly suitable for storage battery power supply; After adopting automatic demarcation mode, can enhance productivity, save each road toggle switch, reduce the PCB area, and can keep a plurality of raw data, so that carry out quality analysis and technology controlling and process; Can improve measuring accuracy after adopting the software and hardware temperature compensation; After adopting the SMT surface to paste technological design, can reduce the PCB area, increase whole aircraft reliability, reduce production costs.

Description of drawings:

Accompanying drawing 1 is multi-functional electronic scale structural representation;

Accompanying drawing 2 is the vertical view of accompanying drawing 1;

Accompanying drawing 3 is the left view of accompanying drawing 2;

Accompanying drawing 4 is for removing the vertical view behind the supporting plate 2 in the accompanying drawing 1;

Accompanying drawing 5 is the complete machine hardware block diagram;

Accompanying drawing 6 is back screen display circuit figure;

Accompanying drawing 7 is preceding screen display circuit figure.

Now in conjunction with the accompanying drawings the utility model is made detailed description:

Multi-functional electronic scale comprises a housing 6, the bottom of housing 6 is provided with four adjustable supports 8, the positive side panel of housing 6 is provided with keyboard 10 and preceding screen display panel 11, the rear side panel of housing 6 is provided with back screen display panel 9, in housing 6, be provided with sensor 3, bubble 7, accumulator 12, power panel 13 and transformer 14, supporting plate 2 joins with sensor 3 by screw 4 and support plate 5, and sensor 3 is screwed in housing 6, and supporting plate 2 is provided with weighing platform panel 1.Circuitry is made up of eight functional blocks, and in circuitry, the front and rear panel display circuit is respectively 16 LED or LCD shows and driving circuit, shows five weight, five unit prices and six amount of money, adopts module serial connection mode to connect; Main control circuit is made up of special-purpose single chip microcomputer circuit and reset circuit, interface circuit, the operation of control total system; Keyboard circuit is that 4 * 5 matrix switches of 20 keys are formed, and with the various functions of operating system: power circuit is formed supply complete machine and the required power supply of module by alternating current-direct current commutation circuit and AC rectification and mu balanced circuit; Modular circuit is a thick mould circuit, comprises reference power supply, stabilized power source, parameter setting circuit, temperature inversion circuit and prime amplifier, A/D converter and low battery voltages testing circuit; In the screen display circuit of back, T ₁-T ₈For word line drives triode, be connected to a, b, c, d, e, f, g, each section of dp of 16 LED respectively, T ₁-T ₈Emitter meet J ₁V _DE, R ₁-R ₈Be T ₁-T ₈Base resistance, be connected to socket J respectively ₁Y ₀-Y ₇T ₉-T ₂₄Be the bit-line drive triode of 16 LED, collector is connected to the public pole of 16 LED, T respectively ₉-T ₂₄Emitter meet J ₁V _DD, R ₉-R ₂₄Be T ₉-T ₂₄Base resistance, be connected to IC respectively ₁S _0-15End, IC ₇For 4-16 selects a code translator; The first half of preceding screen display circuit is with back screen display circuit, T ₁-T ₈Grounded emitter, T ₉-T ₂₄Emitter meet V _DE, such two groups of 16 LED charactrons become the serial connection power supply mode.In preceding screen display circuit, IC ₃Be word line driving circuit, Q ₁-Q ₈Be connected to J respectively ₁Y ₀-Y ₇And R ₁-R ₈IC ₁Be four chip microprocessor chips, D ₀-D ₇Meet IC ₃D ₁-D ₈T ₂₅For buzzer drives triode, pass through R ₂₅Meet IC ₁D ₈, B ₁Be buzzer; IC ₄Be reset circuit, OSC is the 4M crystal oscillating circuit, IC ₅For A/D conversion, stabilized voltage supply, temperature inversion, parameter setting, low-voltage detect; AC/DC detection module 1-21 is connected to J respectively ₃, J ₄And IC ₁RO mouth, R ₃Mouth and D ₁₁-D ₁₃R ₃₀-R ₃₃Be keyboard biasing resistor, K ₁-K ₂₀Be the keyboard circuit switch, be connected to J respectively ₂R ₁Mouth and Q ₀-Q ₄End attachment plug seat; J ₂Be keyboard attachment plug seat, J ₃Be sensor tie point, J ₄Be the power connecting plug seat.

Claims

1, a kind of multi-functional electronic scale, it comprises a housing (6), the bottom of housing (6) is provided with four adjustable supports (8), the positive side panel of housing (6) is provided with keyboard (10) and preceding screen display panel (11), the rear side panel of housing (6) is provided with back screen display panel (9), in housing (6), be provided with sensor (3), bubble (7), accumulator (12), power panel (13) and transformer (14), supporting plate (2) joins with sensor (3) by screw (4) and support plate (5), sensor (3) is screwed in housing (6), supporting plate (2) is provided with weighing platform panel (1), it is characterized in that: circuitry is made up of eight functional blocks, in circuitry, the front and rear panel display circuit is respectively 16 LED or LCD shows and driving circuit, show five weight, five unit prices and six amount of money adopt module serial connection mode to connect; Main control circuit is made up of special-purpose single chip microcomputer circuit and reset circuit, interface circuit, the operation of control total system; Keyboard circuit is that 4 * 5 matrix switches of 20 keys are formed, with the various functions of operating system; Power circuit is made up of alternating current-direct current commutation circuit and AC rectification and mu balanced circuit, supply with complete machine and the required power supply of module: modular circuit is a thick mould circuit, comprises reference power supply, stabilized power source, parameter setting circuit, temperature inversion circuit and prime amplifier, A/D converter and low battery voltages testing circuit; In the screen display circuit of back, T ₁-T ₈For word line drives triode, be connected to a, b, c, d, e, f, g, each section of dp of 16 LED respectively, T ₁-T ₈Emitter meet J ₁V _DE, R ₁-R ₈Be T ₁-T ₈Base resistance, be connected to socket J respectively ₁Y ₀-Y ₇T ₉-T ₂₄Be the bit-line drive triode of 16 LED, collector is connected to the public pole of 16 LED, T respectively ₉-T ₂₄Emitter meet J ₁V _DD, R ₉-R ₂₄Be T ₉-T ₂₄Base resistance, be connected to IC respectively ₁S _0-15End, IC ₇For 4-16 selects a code translator; The first half of preceding screen display circuit is with back screen display circuit T ₁-T ₈Grounded emitter, T ₉-T ₂₄Emitter meet V _DE, such two groups of 16 LED charactrons become the serial connection power supply mode, in preceding screen display circuit, and IC ₃Be word line driving circuit, Q ₁-Q ₈Be connected to J respectively ₁Y ₀-Y ₇And R ₁-R ₈, IC ₁Be four chip microprocessor chips, D ₀-D ₇Meet IC ₃D ₁-D ₈, T ₂₅For buzzer drives triode, pass through R ₂₅Meet IC ₁D ₈, B ₁Be buzzer, IC ₄Be reset circuit, OSC is the 4M crystal oscillating circuit, IC ₅For A/D conversion, stabilized voltage supply, temperature inversion, parameter setting, low-voltage detect, AC/DC detection module 1-21 is connected to J respectively ₃, J ₄And IC ₁RO mouth, R ₃Mouth and D ₁₁-D ₁₃, R ₃₀-R ₃₃Be keyboard biasing resistor, K ₁-K ₂₀Be the keyboard circuit switch, be connected to J respectively ₂R ₁Mouth and Q ₀-Q ₄End attachment plug seat, J ₂Be keyboard attachment plug seat, J ₃Be sensor tie point, J ₄Be the former attachment plug seat of electricity.