CN107966202A - Electronic scale weighing module and its implementation - Google Patents
Electronic scale weighing module and its implementation Download PDFInfo
- Publication number
- CN107966202A CN107966202A CN201711342871.1A CN201711342871A CN107966202A CN 107966202 A CN107966202 A CN 107966202A CN 201711342871 A CN201711342871 A CN 201711342871A CN 107966202 A CN107966202 A CN 107966202A
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- Prior art keywords
- electronic scale
- converter
- microcontroller
- signal
- weighing module
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- Pending
Links
- 238000005303 weighing Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/14—Devices for determining tare weight or for cancelling out the tare by zeroising, e.g. mechanically operated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses electronic scale weighing module and its implementation, Weighing module includes sensor, a/d converter U3, microcontroller U2, three terminal regulator U1, serial converter U4 and power supply；Sensor gathers two-way analog difference signal and enters the input end of analog signal AIN+ and AIN of a/d converter U3 by signal filter circuit；The signal port of the digital signal output end DOUT connection microcontrollers U2 of a/d converter U3；The signal sending end mouth RXD and receiver port TXD of the microcontroller U2 receiver port TIN and signal sending end mouth R1OUT connecting communications with serial converter U4 respectively；The transceiver interface that the signal sending end mouth T1OUT and receiver port R1IN of serial converter U4 is used for respectively with PC host computers is connected.Weight data can be transmitted to PC host computers or other equipment by the present invention, improved the use scope of electronic scale, can be used in combination with external system.The circuit part and in the market similar product price of the present invention is cheaper.
Description
Technical field
The present invention relates to communication field, and in particular to electronic scale weighing module and its implementation.
Background technology
Electronic scale is using the instrument of the lever principle of Hooke's law or power measure mass of object, when object is placed on the scale pan
When, pressure is applied to sensor, which deforms upon, so that impedance changes, while is become using driving voltage
Change, export the analog signal of a change.The signal is output to analog-digital converter through amplifying circuit amplification.It is converted into easy to processing
Digital signal be output to CPU operation controls.This result is output to display by CPU according to keyboard commands and program, directly
To this result of display.
Existing electronic scale is usually independent, that is, collection, processing and the display of result of signal are at one
Realized in module, can not communicate, i.e., can not be used in combination with exterior system with outside realization；In addition, existing electronic scale work(
Can be relatively simple, it can only generally weigh, obtain mass of object, other data can not be gathered.
The content of the invention
In order to solve the above technical problems, the invention discloses electronic scale weighing module and its implementation.
The technical solution adopted by the present invention is：
Electronic scale weighing module, including sensor, a/d converter U3, microcontroller U2, three terminal regulator U1, serial converter
U4 and power supply；The power supply is connected respectively to sensor, a/d converter U3, microcontroller U2 and serial ports by three terminal regulator U1 and turns
Parallel operation U4 powers；
The sensor gathers two-way analog difference signal and enters the simulation of a/d converter U3 by signal filter circuit
Signal input part AIN+ and AIN-；The signal end of the digital signal output end DOUT connection microcontrollers U2 of the a/d converter U3
Mouthful；The signal sending end mouth RXD and receiver port TXD of the microcontroller U2 is received with the signal of serial converter U4 respectively
Port TIN and signal sending end mouth R1OUT connecting communications；The signal sending end mouth T1OUT and signal of the serial converter U4
The transceiver interface that receiving port R1IN is used for respectively with PC host computers is connected.
Sensor is pressure sensor.
Weight data can be transmitted to PC host computers or other equipment by the present invention, improve the use scope of electronic scale.Can
To be used in combination with external system, such as ERP system, ERP system can conveniently gather electronic scale weight, realize ERP system and electricity
Sub- scale integration.
Specifically, the power supply passes sequentially through power switch K1, reverse-filling diode D1, input filter circuit and enters three ends
The input terminal of voltage-stablizer U1, the output terminal of three terminal regulator U1 are connected respectively to sensor, AD conversion by output filter circuit
Device U3, microcontroller U2 and serial converter U4 power supplies.
Further, the reverse-filling diode D1 includes two diodes parallel with one another, the input filter circuit
Including electrolytic capacitor C1 parallel with one another and ceramic condenser C2, the output filter circuit includes ceramic condenser C3 parallel with one another
With electrolytic capacitor C4.
Further, the microcontroller U2 uses SH88F2051SOP16 chips.It is of low cost using this microcontroller, and can
To achieve the purpose that weight data is handled.
Further, the microcontroller U2 is also associated with expansion interface CN3.Expansion interface be used for display screen, mobile phone,
Tablet computer or other equipment connection.
Yet further, the microcontroller is also associated with power indicating circuit.For indicating power supply during microcontroller work
State.
The implementation method of electronic scale weighing module, includes the following steps：
S1, sensor collection two-way analog difference signal are converted into digital signal by a/d converter；
S2, will be processed into the weight data including weight and heavy condition in the digital signal input microcontroller of step S2；
S3, by weight data be transmitted to PC host computers by serial converter.
Specifically, the heavy condition includes stable state, zero point state, tare weight state and overload condition.
Further, in the step S3, the weight data is to include weight, stable state, zero point state, tare weight
The character to decimal string of state and overload condition, PC host computers are transmitted to after being then converted into ASCII character.
Further, the weight data can also be transmitted to mobile phone, tablet by the expansion interface being connected with microcontroller
Computer or display screen.
Compared with prior art, the beneficial effects of the present invention are：
Weight data can be transmitted to PC host computers or other equipment by the present invention, improve the use scope of electronic scale, can
To be used in combination with external system.The circuit part and in the market similar product price of the present invention is cheaper.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it will be appreciated that the following drawings show but the section Example of the present invention, therefore be not to be taken as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the circuit diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Embodiments of the present invention include but not limited to following implementation
Example.
Embodiment
As shown in Figure 1, electronic scale weighing module, including pressure sensor, a/d converter U3, microcontroller U2, expansion interface
CN3, three terminal regulator U1 and serial converter U4.
Direct current 5V electricity passes sequentially through power switch K1, reverse-filling diode D1, input filter circuit and enters three terminal regulator
The input terminal of U1, the output terminal of three terminal regulator U1 connect pressure by output filter circuit, the first electric source filter circuit and pass respectively
Sensor, a/d converter U3 simulation feeder ears AVDD, digital power system end DVDD and reference voltage end VRef.
In the present embodiment, reverse-filling diode D1 includes two diodes parallel with one another, and input filter circuit includes phase
Mutually electrolytic capacitor C1 and ceramic condenser C2 in parallel, output filter circuit include ceramic condenser C3 and electrolytic capacitor parallel with one another
C4, the first electric source filter circuit are " the π types " being made of ceramic condenser C11, ceramic condenser C12, ceramic condenser C13, inductance L3
Filter circuit.
The output terminal of three terminal regulator U1 also passes through output filter circuit, the power end of the second filter circuit and microcontroller U2
VCCL connections, the second filter circuit include ceramic condenser C5.
The output terminal of three terminal regulator U1 also passes through output filter circuit, the electricity of the 3rd filter circuit and serial converter U4
Source VCC connections.Second filter circuit includes ceramic condenser C14.
Pressure sensor gathers two-way analog difference signal, and enters the simulation of a/d converter U3 by signal filter circuit
Signal input part AIN+ and AIN-.
The signal port of the digital signal output end DOUT connection microcontrollers U2 of a/d converter U3, and a/d converter U3
Clock end SCLK is connected with the clock port of microcontroller U2.
Signals of the signal sending end mouth RXD and receiver port TXD of microcontroller U2 respectively with serial converter U4 connects
Receiving end mouth TIN and signal sending end mouth R1OUT connecting communications, for data transmit-receive.
Signal sending end mouth T1OUT and receiver port the R1IN transmitting-receiving with PC host computers respectively of serial converter U4
Interface connects.
Expansion interface CN3 is connected with microcontroller U2, expansion interface be used for display screen, mobile phone, tablet computer or other set
Standby connection.
In the present embodiment, microcontroller U2 is also associated with power indicating circuit.
In the present embodiment, a/d converter U3 uses HX710 chips.
In the present embodiment, microcontroller U2 uses SH88F2051SOP16 chips.
In the present embodiment, serial converter U4 uses SP3232EEN chips.
The implementation method of electronic scale weighing module, includes the following steps:
S1, pressure sensor collection two-way analog difference signal are converted into digital signal by a/d converter；
S2, will be processed into the weight data including weight and heavy condition in the digital signal input microcontroller of step S2；
S3, by weight data be transmitted to PC host computers by serial converter, or by expansion interface be transmitted to mobile phone,
Tablet computer or display screen.
In the present embodiment, heavy condition includes stable state, zero point state, tare weight state and overload condition.
Weight data can be transmitted to PC host computers or other equipment by the present invention, improve the use scope of electronic scale.Can
To be used in combination with external system, such as ERP system, ERP system can conveniently gather electronic scale weight, realize ERP system and electricity
Sub- scale integration.
In step s3, weight data is to include weight, stable state, zero point state, tare weight state and overload condition
Character to decimal string, be transmitted to PC host computers or other equipment after being then converted into ASCII character.
In the present embodiment, two kinds of forms are enumerated：
Form 1：
Character to decimal string format：#0A Nn003.000000.0000100#1C#0D.
ASCII fromat：0A 4E 6E 30 30 33 2E 30 30 30 30 30 30 2E 30 30 30 30 31 30
30 1C 0D。
Format description：
1st：Newline in start bit ' #0A ' ASCII character.
2-3：It is currently state ' Nn ' of weighing to represent electronic scale.
4-10：Represent electronic scale current weight 3KG ' 003.000 '.
11-17：Represent that tare weight state is 0 (not having tare weight) ' 000.000 '.
18-21：Represent that electronic scale is currently weighed state.' 0100 ' the 18th represents overload, and identifier is if 0 table
Show and do not overload, if 1 represents overload；19th represents stabilization, and identifier is if 0 represents unstable, if 1 represents
Stablize；20th represents zero point, represents symbol if 0 represents not in zero point, if 1 represents in zero point；21st represents skin
Weight, represents symbol if 0 represents no tare weight, if 1 indicates tare weight.
22nd：#1C represents check bit (decollator ' FS ' in ASCII character).
23rd：#0D represents stop bits.
Form 2：
Character to decimal string format：#1#2S#20 03.000kgb#3#4#0.
ASCII fromat：01 02 53 20 30 33 2E 30 30 30 6B 67 62 03 04 00.
Format description：
1-2：Represent start bit ' #1#2 ' (ASCII character SOH and STX).
3rd：Represent electronic scale mode bit ' S ' (when mode bit is that ' S ' represents that electronic scale is stable state, current state
Position is that ' U ' represents that electronic scale weight is unstable, and current state is that ' F ' represents that electronic scale weight is overflowed).
4-10：Represent that (first ' #20 ' is represented in ASCII character electronic scale actual weight 3KG ' #20 03.000 '
Space identifier accords with；If -3KG is then ' -03.000 '；).
11-12：Represent current weight unit ' kg '.
13rd：Represent check bit.
14th：Expression mode bit of weighing (is converted under binary condition：5th expression zero-bit state：1 represents electronics
Scale is zeroed, and 0 represents electronic scale non-return-to-zero；6th is tare weight state：1 expression electronic scale has tare weight, and 0 expression electronic scale does not have skin
Weight；7th expression overload condition：1 represents electronic scale overload, and 0 expression electronic scale does not overload).
According to above-described embodiment, the present invention can be realized well.What deserves to be explained is based on above-mentioned design principle, it is
Same technical problem is solved, some made on architecture basics disclosed in this invention are without substantive change or profit
Color, used technical solution essence is still as the present invention, therefore it should also be as within the scope of the present invention.
Claims (10)
1. electronic scale weighing module, it is characterised in that including sensor, a/d converter U3, microcontroller U2, three terminal regulator U1,
Serial converter U4 and power supply；
The power supply is connected respectively to sensor, a/d converter U3, microcontroller U2 and serial converter by three terminal regulator U1
U4 powers；
The sensor gathers two-way analog difference signal and enters the analog signal of a/d converter U3 by signal filter circuit
Input terminal AIN+ and AIN-；
The signal port of the digital signal output end DOUT connection microcontrollers U2 of the a/d converter U3；
Signals of the signal sending end mouth RXD and receiver port TXD of the microcontroller U2 respectively with serial converter U4 connects
Receiving end mouth TIN and signal sending end mouth R1OUT connecting communications；
The signal sending end mouth T1OUT and receiver port R1IN of the serial converter U4 be used for respectively with PC host computers
Transceiver interface connects.
2. electronic scale weighing module according to claim 1, it is characterised in that the power supply passes sequentially through power switch
K1, reverse-filling diode D1, input filter circuit enter the input terminal of three terminal regulator U1, and the output terminal of three terminal regulator U1 leads to
Cross output filter circuit and be connected respectively to sensor, a/d converter U3, microcontroller U2 and serial converter U4 power supplies.
3. electronic scale weighing module according to claim 2, it is characterised in that the reverse-filling diode D1 includes two
Diode parallel with one another, the input filter circuit includes electrolytic capacitor C1 parallel with one another and ceramic condenser C2, described defeated
Going out filter circuit includes ceramic condenser C3 and electrolytic capacitor C4 parallel with one another.
4. electronic scale weighing module according to claim 1, it is characterised in that the microcontroller U2 is used
SH88F2051SOP16 chips.
5. according to the electronic scale weighing module described in claim 1-4 any one, it is characterised in that the microcontroller U2 also connects
It is connected to expansion interface CN3.
6. according to the electronic scale weighing module described in claim 1-4 any one, it is characterised in that the microcontroller is also connected with
There is power indicating circuit.
7. the implementation method of the electronic scale weighing module according to claim 1-6 any one, it is characterised in that including such as
Lower step：
S1, sensor collection two-way analog difference signal are converted into digital signal by a/d converter；
S2, will be processed into the weight data including weight and heavy condition in the digital signal input microcontroller of step S2；
S3, by weight data be transmitted to PC host computers by serial converter.
8. the implementation method of electronic scale weighing module according to claim 7, it is characterised in that the heavy condition includes
Stable state, zero point state, tare weight state and overload condition.
9. the implementation method of electronic scale weighing module according to claim 8, it is characterised in that in the step S3, institute
It is the character to decimal string for including weight, stable state, zero point state, tare weight state and overload condition to state weight data, so
After be converted into ASCII character after be transmitted to PC host computers.
10. the implementation method of electronic scale weighing module according to claim 7, it is characterised in that the weight data is also
Mobile phone, tablet computer or display screen can be transmitted to by the expansion interface being connected with microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711342871.1A CN107966202A (en) | 2017-12-14 | 2017-12-14 | Electronic scale weighing module and its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711342871.1A CN107966202A (en) | 2017-12-14 | 2017-12-14 | Electronic scale weighing module and its implementation |
Publications (1)
| Publication Number | Publication Date |
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| CN107966202A true CN107966202A (en) | 2018-04-27 |
Family
ID=61995426
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711342871.1A Pending CN107966202A (en) | 2017-12-14 | 2017-12-14 | Electronic scale weighing module and its implementation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110825001A (en) * | 2019-11-30 | 2020-02-21 | 河南潜合自动化科技有限公司 | Dry-mixed mortar control system |
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