CN202614364U

CN202614364U - Portable electronic scale

Info

Publication number: CN202614364U
Application number: CN 201220043668
Authority: CN
Inventors: 李超
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-12
Filing date: 2012-02-12
Publication date: 2012-12-19
Anticipated expiration: 2022-02-12

Abstract

The utility model provides a portable electronic scale, comprising a capacitor sensing module, a main control module, a display module and a button module. The portable electronic scale is characterized in that the main control module is connected with the capacitor sensing module, the display module and the button module separately; when the portable electronic scale is used to measure the weight of an object, the capacitor sensing module measures the before and after capacitance values, then, the main control module computes and carries out logic processing on the before and after capacitance values, and then, the display module displays the before and after capacitance values, and finally, the button module sets the relevant parameters.

Description

Portable electronic scale

Technical field

The utility model relates to a kind of electronic scales, especially portable electronic scale.

Background technology

At present, the use of desk-top electronic scales in commerce and trade is quite general, and bigger limitation volume is big, cost is high, need the AC power supply, carry inconvenience, application places is restricted but exist.Existing portable balance is steelyard or realizes the spring balance that measures with spring, stretcher strain that what the resident used is steelyard basically.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 mistake; So that damage; Having influence on the accuracy and the reliability of weighing, is a kind of temporary transient substitute, also is put into the ranks of cancellation gradually.

Summary of the invention

In order to overcome the above problems, it is the main control module that the utility model adopts single-chip microcomputer, has safe and reliable, quick direct-reading, advantage such as easy to carry.

The utility model provides a kind of portable electronic scale, comprises capacitance sensing module, main control module, display module, key-press module, it is characterized in that: the main control module is connected with capacitance sensing module, display module, key-press module respectively.When Measuring Object weight, the capacitance sensing module is through capacitance before and after measuring, and the main control module is calculated the fore-and-aft survey value, after the logical process, shows through display module, and key-press module can be provided with correlation parameter.

The beneficial effect of the utility model is that the electronic scales volume is little, accurate measurement, easy to carry, integrates quality weighing function and calculation of price function, can satisfy the user demand of commerce and trade and resident family, has higher utility.

Description of drawings

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

Embodiment

In Fig. 1, portable electronic scale comprises capacitance sensing module 1, main control module 2, display module 3, key-press module 4, it is characterized in that: main control module 2 is connected with capacitance sensing module 1, display module 3, key-press module 4 respectively.When Measuring Object weight, capacitance sensing module 1 is through capacitance before and after measuring, and main control module 2 is calculated the fore-and-aft survey value, after the logical process, shows through display module 3 that key-press module 4 can be provided with correlation parameter.

Capacitance sensing module 1 adopts pole-changing apart from the formula capacitive transducer; It is made up of the parallel plate electrode of a pair of distance variable, and two plates link to each other with flexible member, when when a portable plate applies pulling force; The two-plate distance changes, thereby has changed the electric capacity of plate condenser.The electric capacity that records is carried out computing through main control module 2; What main control module 2 adopted is the PIC16F628 single-chip microcomputer of Microchip company, has execution speed height, low in energy consumption, advantages of small volume, WV is low, driving force is strong, superior function such as wide in variety, and 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 have one 16 bit timing device/counter (TMR1) and one 8 bit timing device/counter (TMRO).Display module 3 adopts 44780 LCD driven; HD44780 (KS0062) is the extensive dot matrix lcd controller made from the Low-Power CMOS technology, links to each other with the 4bit/8bit microprocessor, and it can make dot matrix LCD show the information that capital and small letter English alphabet, numbers and symbols etc. are abundant; There is stronger versatility to use simultaneously; Easy to use, the user can just can form a perfect lattice LCD system with few components, and what key-press module 4 adopted is 4 * 4 matrix keyboards; One has 16 keys, is respectively numerical key 0 ~ 9 and function key A ~ F.

Claims

1. the utility model provides a kind of portable electronic scale; Comprise capacitance sensing module (1), main control module (2), display module (3), key-press module (4), it is characterized in that: main control module (2) is connected with capacitance sensing module (1), display module (3), key-press module (4) respectively.