CN202885923U

CN202885923U - High-precision voice electronic scale

Info

Publication number: CN202885923U
Application number: CN 201220564688
Authority: CN
Inventors: 徐永亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-04-17
Anticipated expiration: 2022-10-31

Abstract

The utility model provides a high-precision voice electronic scale which comprises a capacitor sensing module, a high-stability reference capacitor module, a multi-path switch module, a master control module, a display module, a key module and a voice prompt module. The high-precision voice electronic scale is characterized in that the master control module is respectively connected with the multi-path switch module, the display module, the key module and the voice prompt module; and the multi-path switch module is respectively connected with the capacitor sensing module and the high-stability reference capacitor module. When the weight of an object is measured, the capacitance value measured by the capacitor sensing module is converted through the capacitance frequency, a reference frequency signal is generated by employing the high-stability reference capacitor module, an error is eliminated, the reference frequency signal is transmitted to the master control module through the multi-path switch module, the master control module calculates the measurement value, and the measurement value is logically processed and is displayed through the display module; and moreover, the measurement value is output to the voice prompt module to perform voice temperature recording, the interval time of the voice prompt is set through the key module, and the voice function can be turned off.

Description

The high precision electronic balance with sonic display

Technical field

The utility model relates to a kind of electronic scales, especially the high precision electronic balance with sonic display.

Background technology

At present, the use of desk-top electronic scales in commerce and trade is quite general, and larger limitation volume is large, cost is high, need the AC power supply, carry inconvenience, application places is restricted but exist.Existing portable balance is the spring balance that steelyard or realize with spring, stretcher strain measures, and what the resident used is steelyard substantially.Spring pan scale manufacture process requirement is higher, the fatigue problem of spring can't thoroughly solve, in case surpass the spring limit, spring balance will produce very large error, so that damage, have influence on accuracy and the reliability of weighing, aspect reading, particularly the elderly has defective vision, and does not allow readability accurate.

Summary of the invention

In order to overcome the above problems, it is main control module that the utility model adopts single-chip microcomputer, has adopted high stable reference capacitance and voice cue module to calibrate and reading, has safe and reliable, voice direct-reading, easy to carry, precision advantages of higher.

The utility model provides a kind of high precision electronic balance with sonic display, comprise capacitance sensing module, high stable reference capacitance module, multi-way switch module, main control module, display module, key-press module, voice cue module, it is characterized in that: main control module is connected with multi-way switch module, display module, key-press module, voice cue module respectively, and the multi-way switch module also is connected with capacitance sensing module, high stable reference capacitance module.When measuring weight of object, the capacitance that the capacitance sensing module measures is through Capacitance frequency conversion, and employing high stable reference capacitance module generating reference frequency signal, eliminate error, be sent to main control module through the multi-way switch module, main control module calculates measured value, after the logical process, show through display module, export on the other hand voice cue module, carry out the count off of voice temperature, set by key-press module the interval time of voice suggestion, also can turn-off phonetic function.

The beneficial effects of the utility model are, the electronic scales volume is little, accurate measurement, easy to carry, precision is high, integrate quality weighing function, calculation of price, voice counting function, can satisfy the user demand of commerce and trade and resident family, have higher practical value.

Description of drawings

Fig. 1 is theory diagram of the present utility model.

Embodiment

In Fig. 1, the utility model provides a kind of high precision electronic balance with sonic display, comprise capacitance sensing module 1, high stable reference capacitance module 2, multi-way switch module 3, main control module 4, display module 5, key-press module 6, voice cue module 7, it is characterized in that: main control module 4 is connected with multi-way switch module 3, display module 5, key-press module 6, voice cue module 7 respectively, and multi-way switch module 3 also is connected with capacitance sensing module 1, high stable reference capacitance module 2.When measuring weight of object, the capacitance that capacitance sensing module 1 measures is through Capacitance frequency conversion, and employing high stable reference capacitance module 2 generating reference frequency signals, eliminate error, be sent to main control module 4 through multi-way switch module 3, main control module 4 calculates measured value, after the logical process, show through display module 5, export on the other hand voice cue module 7, carry out the count off of voice temperature, set by key-press module 6 interval time of voice suggestion, also can turn-off phonetic function.

Capacitance sensing module 1 adopts polar distance formula capacitive transducer, it is made of the parallel plate electrode of a pair of distance variable, two plates link to each other with flexible member, when applying pulling force to a portable plate, the two-plate distance changes, thereby changed the electric capacity of plate condenser, behind Capacitance frequency conversion, the circuit output frequency is directly proportional with electric capacity.High stable reference capacitance module 2 is to be made of cref electric capacity and ICM7556 timer, and the generating reference frequency signal is eliminated systematic error, realizes high-acruracy survey.What multi-way switch module 3 adopted is that MAX325 is the accurate single supply SPST analog switch that MAXIM company produces, and it is comprised of an open type switch and a closed type switch, has the characteristics such as low-power consumption, low on-resistance.These chip two control ends all connect the RB3 pin of main control module 4, the selection of system's two-way frequency signal input channel is by main control module 4 controls, what main control module 4 adopted is the PIC16F628 single-chip microcomputer of Microchip company, has execution speed high, low in energy consumption, volume is small and exquisite, operating voltage is low, driving force is strong, the superior function such as wide in variety, operating voltage range is 3.0v ~ 5.5v, clock frequency is DC ~ 20MHZ, inside has 1kX14 (position) sheet internal program storer, the general RAM of 224 bytes, 128 byte EEPROM, 15 two-way I/O lines and 10 interrupt sources, and with 16 bit timing device/counters (TMR1) and 8 bit timing device/counters (TMRO).Display module 5 adopts 44780 LCD that drive, HD44780 (KS0062) is the extensive dot matrix LCD controller made from the Low-Power CMOS technology, link to each other with the 4bit/8bit microprocessor, it can make dot matrix LCD show the information that capital and small letter English alphabet, numbers and symbols etc. are abundant, there is simultaneously stronger versatility to use, easy to use, the user can just can form a perfect lattice LCD system with a small amount of element, what key-press module 6 adopted is 4 * 4 matrix keyboards, one has 16 keys, is respectively numerical key 0 ~ 9 and function key A ~ F.Voice cue module 7 adopts the ISD1420 chip, its maximum characteristics are: adopted direct modeling amount Storage Techniques DAST, finish the typing of voice, storage and segmentation access, and need not as other sound circuits, pass through A/D, D/A conversion, the digital information that digital compression and phonetic synthesis etc. are complicated is processed and transform part, thereby the effective constituent that can keep preferably in the analog quantity reduces distortion, raising record/playback quality.

Claims

1. high precision electronic balance with sonic display, comprise capacitance sensing module (1), high stable reference capacitance module (2), multi-way switch module (3), main control module (4), display module (5), key-press module (6), voice cue module (7), it is characterized in that: main control module (4) is connected with multi-way switch module (3), display module (5), key-press module (6), voice cue module (7) respectively, and multi-way switch module (3) also is connected with capacitance sensing module (1), high stable reference capacitance module (2).