CN104634425A

CN104634425A - Electronic scale with temperature compensating function

Info

Publication number: CN104634425A
Application number: CN201510069507.7A
Authority: CN
Inventors: 马俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-07
Filing date: 2015-02-07
Publication date: 2015-05-20

Abstract

The invention discloses an electronic scale with a temperature compensating function and belongs to the technical field of the electronic scale. The problem that an error of a sensor is caused by temperature influence in the current electronic scale is solved. The electronic scale comprises a central processing unit module, a weight sensor module, a temperature sensor module, a power supply, an external display module and a peripheral circuit, wherein the weight sensor module and the temperature sensor module are both electrically connected with the central processing unit module; the central processing unit module comprises a storage unit, a built-in analog-to-digital conversion circuit and a built-in operation unit; the built-in analog-to-digital conversion circuit is used for performing signal conversion on weight and temperature numerical values; the built-in operation unit is electrically connected with the external display module. Each function is realized through operation and correction, temperature is converted into a digital value, and ambient temperature is calculated by a formula; weighing measurement is compensated under different temperatures according to temperature characteristic PPM value of the sensor so as to obtain a precise weight value.

Description

A kind of electronic scales with temperature compensation

Technical field

The present invention relates to a kind of electronic scales, especially relate to a kind of electronic scales with temperature compensation.

Background technology

The sensor temperature influence of electronic scale, have certain error, such as when 30 °, area, Zhejiang Province, the electronic scale display weight 60KG that adjustment is good, but when only having 5 ° northern to temperature, reading just may only have 59.6KG, when going temperature to be 40 ° tropical, reading becomes 60.2KG again, therefore, the error produced when large numbers of items needs to measure is larger, can cause certain loss to litigant.

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of to increase a module, according to reading and temperature error calculation out, automatically increases or decreases the electronic scales of reading when display.

The present invention solves the problems of the technologies described above adopted technical scheme: a kind of electronic scales with temperature compensation, it is characterized in that, it comprises CPU module, weight induction device module, temperature inductor module, power supply, outer aobvious module and peripheral circuit thereof, described weight induction device module and temperature inductor module are all electrically connected with CPU module, described CPU module comprises storage unit, and weight and Temperature numerical are carried out to built-in analog to digital conversion circuit and the built in op unit of signal conversion, described built in op unit is electrically connected with outer aobvious module.

Be digital quantity by temperature inversion, in built in op unit, calculate environment temperature by publicity; According to temperature characterisitic PPM value, at different temperature weighing measurement is compensated, to draw accurate gravimetric value.

Described CPU module is the single-chip microcomputer of model C SU1185, and the single-chip microcomputer of CSU1185 model has inner ADC, and described built-in analog to digital conversion circuit and built in op unit are completed by inner ADC.

Described temperature inductor module collection, on the single-chip microcomputer of model C SU1185, is the built-in temperature sensor of single-chip microcomputer.

Described power acquisition 3V input voltage.

Described model C SU1185 single-chip microcomputer has LCD driver module, and described outer aobvious module is the LCD of number of characters 16 × 4, and outer aobvious module is electrically connected with above-mentioned LCD driver module.

Described weight induction device module is strain chip weight sensor.

Compared with prior art, this device adopts single-chip microcomputer CSU1185, is with the functions such as inner ADC, temperature sensor, time clock feature, timer, LCD driving, detect each input signal, by computing, correction, realize each function, be digital quantity by temperature inversion, calculate environment temperature by publicity; According to the temperature characterisitic PPM value of sensor, at different temperature weighing measurement is compensated, to draw accurate gravimetric value.

Accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present invention;

Fig. 2 is the circuit theory diagrams of temperature inductor module in the present invention;

Fig. 3 is circuit diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.

As shown in Figure 1, this electronic scales comprises CPU module, weight induction device module, temperature inductor module, the power supply of 3v voltage, outer aobvious module and peripheral circuit thereof, CPU module is the single-chip microcomputer of model C SU1185, the module circuit diagram of each label and Fig. 1 one_to_one corresponding in Fig. 3, CSU1185 type single-chip microcomputer comprises inner ADC, LCD driver module etc., temperature inductor module integration is built-in temperature sensor in CSU1185 single-chip microcomputer, weight induction device module is then electrically connected with CPU module, described inner ADC comprises built-in analog to digital conversion circuit and built in op unit, described weight induction device module is strain chip weight sensor, shown in Fig. 2, when the signal of built-in temperature sensor and weight sensor reaches built-in analog to digital conversion circuit, weight signal and temperature signal are converted into digital signal, then go in built in op unit through cell stores, in built in op unit, the numerical value of temperature and the numerical value of quality are by formula: W={I × [1+K (T-T _r)] × W _r÷ I _r(calibration weight---W _r, AD value---the I of calibration weight _r, temperature during calibration---T _r, weigh---W, AD value---the I of weigh, temperature during weighing---T, the temperature coefficient of weight sensor---K) calculate and correct, according to the temperature characterisitic PPM value of sensor, at different temperature weighing measurement is compensated, to draw accurate gravimetric value.

Described described outer aobvious module is the LCD of number of characters 16 × 4, and outer aobvious module is electrically connected with above-mentioned LCD driver module, and the gravimetric value calculated finally shows in the LCD of outer aobvious module, and outer aobvious module adopts LED backlight, so that use when light is dark.

Should be appreciated that, in claims of the present invention, instructions, all " comprising ... " is all interpreted as open implication, and namely its implication is equal to " at least containing ... ", and should not be construed as enclosed implication, namely its implication should not be construed " only comprising ... ".

Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims

1. one kind has the electronic scales of temperature compensation, it is characterized in that, it comprises CPU module, weight induction device module, temperature inductor module, power supply, outer aobvious module and peripheral circuit thereof, described weight induction device module and temperature inductor module are all electrically connected with CPU module, described CPU module comprises storage unit, and weight and Temperature numerical being carried out to built-in analog to digital conversion circuit and the built in op unit of signal conversion, described built in op unit is electrically connected with outer aobvious module.

2. a kind of electronic scales with temperature compensation according to claim 1, it is characterized in that, described CPU module is the single-chip microcomputer of model C SU1185, and the single-chip microcomputer of CSU1185 model has inner ADC, and described built-in analog to digital conversion circuit and built in op unit are completed by inner ADC.

3. a kind of electronic scales with temperature compensation according to claim 2, is characterized in that, described temperature inductor module collection, on the single-chip microcomputer of model C SU1185, is the built-in temperature sensor of single-chip microcomputer.

4. a kind of electronic scales with temperature compensation according to claim 1 and 2, is characterized in that, described power acquisition 3V input voltage.

5. a kind of electronic scales with temperature compensation according to claim 2, is characterized in that, described model C SU1185 single-chip microcomputer has LCD driver module, and described outer aobvious module is the LCD of number of characters 16 × 4, and outer aobvious module is electrically connected with above-mentioned LCD driver module.

6. a kind of electronic scales with temperature compensation according to claim 1 and 2, is characterized in that, described weight induction device module is strain chip weight sensor.