CN102410868B - Batching controller and ingredient control method thereof - Google Patents
Batching controller and ingredient control method thereof Download PDFInfo
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- CN102410868B CN102410868B CN201110214886.6A CN201110214886A CN102410868B CN 102410868 B CN102410868 B CN 102410868B CN 201110214886 A CN201110214886 A CN 201110214886A CN 102410868 B CN102410868 B CN 102410868B
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Abstract
The invention discloses a kind of batching controller and ingredient control method thereof, this batching controller includes that sensor input, elimination disturb filter circuit, the amplifying circuit of signal, be built-in with temperature measurement module and can carry out the MCU of temperature-compensating, display driver circuit, optocoupler and drive circuit, keyboard circuit etc. according to external temperature to batching controller.Owing to having carried out temperature-compensating and anti-interference filtration process, this batching controller reduces its sensitiveness that temperature changes to external world, and its antijamming capability is also improved, thus overall stability and the reliability improving whole batching controller.
Description
Technical field
The present invention relates to a kind of Weighing instrument, particularly relate to a kind of batching controller and ingredient control method thereof.
Background technology
In the industrial processes such as food processing, tobacco processing, chemical products processing, feed manufacturing, some loose unpacked materials
Dispensing needs weighing measurement batching control.Current feed proportioning system generally comprises silo, which is provided with several for not jljl
The dog-house that material is thrown in, the dog-house of every kind of material is designed with slightly throwing mouth and the thin draught animals, is provided with weight sensor below silo,
Also include the batching controller throwing in control for material.During use, by batching controller and weight sensor and every kind of material
Dog-house control valve is connected, and is set the total input treating every kind of material (assuming there are three kinds of materials) in dispensing by batching controller
Amount, the thick release sequence throwing threshold value and all materials of every kind of material, then start simultaneously the first material thick throw the draught animals and
Thin head is thrown mouth and is fed intake, and hereafter batching controller judges whether the instantaneous weight signal that weight sensor is passed back reaches the first thing
The thick of material throws threshold value, if reaching, closing it and slightly throwing the draught animals, then judges instantaneous weight signal that weight sensor passes back whether
Reach total injected volume of the first material, if reaching, closing its thin head and throwing mouth, thus completing the input of the first material, depending on
This analogizes, and carries out the input of the second material and the third material according to release sequence, and hereafter, batching controller sends discharging letter
Number to silo so that it is carry out material and automatically unload, thus complete a proportioning materials process.Patent No. 03143256.5
Chinese patent also discloses a kind of continuous automatic feed proportioning machine and ingredient control method thereof, and it is to add dissipating of stepper motor composition by PLC
Material automatic control system.But this continuous automatic feed proportioning machine temperature to external world is sensitive, poor anti jamming capability.
Content of the invention
It is an object of the invention to provide a kind of batching controller stable and reliable for performance and ingredient control method thereof.
For reaching above-mentioned purpose, one aspect of the present invention provides a kind of batching controller, comprising:
Sensor input, for receiving the instantaneous weight signal of weight sensor output；
Filter circuit, for filtering the High-frequency Interference in described instantaneous weight signal；
Amplifying circuit, is amplified for the instantaneous weight signal after processing described filter circuit；
MCU, prestoring needs total injected volume of every kind of material in dispensing, the thick input throwing threshold value and all materials of every kind of material
Sequentially, for obtain in launch process described instantaneous weight signal and described MCU built-in temperature measurement module output current outside
Described instantaneous weight signal and described ambient temperature signal are transformed into corresponding number according to built-in AD conversion module by temperature signal
Word signal, after the instantaneous weight signal after to digitlization carries out moving average filter, according to the ambient temperature signal after digitlization
Temperature-compensating is carried out to the instantaneous weight signal after moving average filter, carries out cumulative meter to the instantaneous weight signal after temperature-compensating
Calculate, and throw according to thick threshold value, total injected volume of corresponding material and the release sequence of throwing of current accumulator weight, corresponding material
Control；
Display driver circuit, sends to numeral method for the accumulator weight calculating described MCU in real time；
Optocoupler and drive circuit, for carrying out anti-interference isolation rear drive output by the control signal of described MCU output；
Keyboard circuit, is used for arranging meter parameter, described meter parameter include treating total injected volume of every kind of material in dispensing, every kind
The thick release sequence throwing threshold value and all materials of material.
The batching controller of the present invention, described according to digitlization after ambient temperature signal to the instantaneous weight after moving average filter
Signal carries out temperature-compensating, specifically includes:
Carrying out temperature-compensating according to formula y=y-k* Δ t to the instantaneous weight signal after moving average filter, wherein, y is instantaneous
Weight, k is temperature compensation coefficient, Δ t current time.
The batching controller of the present invention, also includes:
It for RS232 communication module and the RS485 communication module of described MCU and upper machine communication, and is used for described RS232
Communication module and described RS485 communication module inter mode switching communication switching circuit, described communication switching circuit respectively with institute
The one end stating RS232 communication module is connected with one end of described RS485 communication module, and is connected with described MCU by serial ports.
The batching controller of the present invention, also includes:
Protection circuit, for input or export described RS485 communication module or the signal of described RS485 communication module resists
Interference process, described protection circuit respectively with another of the other end of described RS232 communication module and described RS485 communication module
End is connected.
The batching controller of the present invention, also includes:
Terminal block, it is integrated with described optocoupler and drive circuit, the input of described protection circuit or lead-out terminal.
Another further aspect, the ingredient control method that present invention also offers a kind of above-mentioned batching controller comprises the following steps:
Open simultaneously and treat that in dispensing, the thick of the first material is thrown mouth and carefully throw the input that mouth carries out the first material described；
In launch process obtain weight sensor output instantaneous weight signal and described MCU built-in temperature measurement module output work as
Front ambient temperature signal；
According to built-in AD conversion module, described instantaneous weight signal and described ambient temperature signal are transformed into corresponding numeral to believe
Number；
After instantaneous weight signal after to digitlization carries out moving average filter, according to the ambient temperature signal after digitlization to cunning
Instantaneous weight signal after dynamic average filter carries out temperature-compensating；
Carry out accumulation calculating to the instantaneous weight signal after temperature-compensating, and judge current accumulator weight whether reach described the first
The thick of material throws threshold value, if reached, then closes the thick of the first material described and throws mouth；
Judge whether current accumulator weight reaches total injected volume of the first material described, if reached, then close described the first
The thin of material throws mouth；
According to release sequence and according to aforesaid way carry out described in treat the input of unclassified stores in dispensing.
The ingredient control method of the present invention, described according to the ambient temperature signal after digitlization instantaneous heavy to after moving average filter
Amount signal carries out temperature-compensating, specifically includes:
Carrying out temperature-compensating according to formula y=y-k* Δ t to the instantaneous weight signal after moving average filter, wherein, y is instantaneous
Weight, k is temperature compensation coefficient, Δ t current time.
The ingredient control method of the present invention, described batching controller also includes:
It for RS232 communication module and the RS485 communication module of described MCU and upper machine communication, and is used for described RS232
Communication module and described RS485 communication module inter mode switching communication switching circuit, described communication switching circuit respectively with institute
The one end stating RS232 communication module is connected with one end of described RS485 communication module, and is connected with described MCU by serial ports.
The ingredient control method of the present invention, described batching controller also includes:
Protection circuit, for input or export described RS485 communication module or the signal of described RS485 communication module resists
Interference process, described protection circuit respectively with another of the other end of described RS232 communication module and described RS485 communication module
End is connected.
The ingredient control method of the present invention, described batching controller also includes:
Terminal block, it is integrated with described optocoupler and drive circuit, the input of described protection circuit or lead-out terminal.
The batching controller of the present invention includes the filtering for filtering the High-frequency Interference in the instantaneous weight signal that weight sensor exports
Prestore in circuit, and MCU and need total injected volume of every kind of material in dispensing, the thick of every kind of material and throw threshold value and property
Material release sequence, in launch process MCU obtain instantaneous weight signal and MCU built-in temperature measurement module output current outside
Instantaneous weight signal and ambient temperature signal are transformed into corresponding data signal according to built-in AD conversion module by temperature signal,
After instantaneous weight signal after to digitlization carries out moving average filter, flat to sliding according to the ambient temperature signal after digitlization
All filtered instantaneous weight signal carries out temperature-compensating, carries out accumulation calculating, and root to the instantaneous weight signal after temperature-compensating
Carry out throwing in control according to thick threshold value, total injected volume of corresponding material and the release sequence of throwing of current accumulator weight, corresponding material, because of
This, the batching controller of the present invention reduces its sensitiveness that temperature changes to external world, and its antijamming capability is also improved,
Thus entirety improves stability and the reliability of whole batching controller.
Brief description
Fig. 1 is the circuit block diagram of the batching controller of one embodiment of the invention；
Fig. 2 is the circuit theory diagrams of the MCU part of batching controller in Fig. 1；
Fig. 3 is the circuit theory diagrams of the sensor wire terminal of batching controller in Fig. 1 and filter circuit part；
Fig. 4 is the circuit theory diagrams of the amplification circuits of batching controller in Fig. 1；
Fig. 5 is the circuit theory diagrams of the keyboard circuit part of batching controller in Fig. 1；
Fig. 6 is the circuit theory diagrams of the display driver circuit part of batching controller in Fig. 1；
Fig. 7 is the circuit theory diagrams of the communication switching circuit of batching controller in Fig. 1 and protection circuit part；
Fig. 8 is the circuit theory diagrams of the RS485 communication module of batching controller in Fig. 1 and RS232 communication module part；
Fig. 9 is the circuit theory diagrams of the optocoupler of batching controller in Fig. 1 and driving circuit section；
Figure 10 is the interface structure schematic diagram of the terminal block part of batching controller in Fig. 1；
Figure 11 is the circuit theory diagrams of the power circuit part of batching controller in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in detail:
With reference to shown in Fig. 1, the batching controller of the present embodiment include sensor input, filter circuit, amplifying circuit, MCU,
Display driver circuit, optocoupler and drive circuit, keyboard circuit, RS232 communication module, RS485 communication module, communication switching electricity
Road, protection circuit, terminal block and power circuit etc..Wherein, sensor input is for receiving the wink of weight sensor output
When weight signal.Filter circuit is for filtering the High-frequency Interference in instantaneous weight signal.Amplifying circuit is for by filter circuit process
After instantaneous weight signal be amplified.MCU prestores and needs total injected volume of every kind of material in dispensing, the thick of every kind of material and throw threshold
Value and the release sequence of all materials, for the built-in temperature measurement module of acquisition instantaneous weight signal in launch process and MCU
The current outside temperature signal of output, it is right to be transformed into instantaneous weight signal and ambient temperature signal according to built-in AD conversion module
The data signal answered, after the instantaneous weight signal after to digitlization carries out moving average filter, according to the extraneous temperature after digitlization
Degree signal carries out temperature-compensating to the instantaneous weight signal after moving average filter, carries out the instantaneous weight signal after temperature-compensating
Accumulation calculating, and enter according to thick threshold value, total injected volume of corresponding material and the release sequence of throwing of current accumulator weight, corresponding material
Row throws in control.Display driver circuit sends to numeral method for the accumulator weight calculating MCU in real time.Optocoupler and driving
Dynamic circuit for carrying out anti-interference isolation rear drive output by the control signal of MCU output.Keyboard circuit is used for arranging meter parameter,
As treated total injected volume of every kind of material in dispensing, the thick release sequence etc. throwing threshold value and all materials of every kind of material.And it is electric
Source circuit is for powering to equipment.
In conjunction with shown in Fig. 2, single-chip microcomputer that MCU can select model to be AduC847 and peripheral circuit thereof, its peripheral circuit includes
Coupled model is the driving chip of 74HC245D.
In conjunction with shown in Fig. 3, sensor input the 2nd, the 3rd terminal is connected with the input of filter circuit.Sensor inputs
Terminal the 6th terminal is connected with the ST end of filter circuit.The SN-end of filter circuit and SN+ end are corresponding respectively and above-mentioned single-chip microcomputer
7th is connected with the 8th pin.
In conjunction with shown in Fig. 4, amplification chip that amplifying circuit can select model to be AD8552 and peripheral circuit thereof, wherein, this is put
The of large chip the 3rd, the 5th pin correspondence respectively is connected with+the INA ,+INB output of filter circuit.And the SIG+ of this amplifying circuit,
9th and the 10th pin of SIG-terminal corresponding and above-mentioned single-chip microcomputer respectively is connected.
In conjunction with shown in Fig. 5, four buttons SW1, SW2, SW3 and SW4 of keyboard circuit respectively with the 52nd of above-mentioned single-chip microcomputer～
49th pin is connected.
In conjunction with shown in Fig. 6, display driver circuit can select two models be the integrated serial input/output of Max7219 altogether
The of negative electrode display driver U2 and U3, display driver U2 the 1st, the 13rd and the 12nd pin is corresponding with above-mentioned single-chip microcomputer respectively
The 22nd, the 23rd be connected with the 24th pin.The of display driver U3 the 1st, the 13rd and the 12nd pin is corresponding and above-mentioned respectively
The 22nd, the of single-chip microcomputer the 23rd be connected with the 25th pin.
In conjunction with shown in Fig. 8, RS232 communication module includes that model is MAX232 chip and peripheral circuit thereof, RS485 communication module
Including model is MAX485 chip and peripheral circuit thereof, wherein, the 11st pin of MAX232 chip and the 4th of MAX485 chip the
Pin respectively with select that switch two of SW7 selection ends are corresponding to be connected, select the of the common port of switch SW7 and above-mentioned single-chip microcomputer
17 pins are connected.1st pin of the 12nd pin of MAX232 chip and MAX485 chip, two with selection switch SW8 respectively
Select end corresponding connected, select the common port of switch SW8 to be connected with the 16th pin of above-mentioned single-chip microcomputer.
In conjunction with shown in Fig. 7, select between switch SW5 and resistance L1, select to be connected to one respectively between switch SW6 and resistance L2
The individual protection circuit being made up of TVS diode and electric capacity parallel connection, is used for protecting communication chip and MCU not to be hindered by outside bursty interference
Evil.Wherein, two selection ends corresponding JL+ terminal with RS485 communication module and the MAX232 core respectively of switch SW5 are selected
14th pin of piece is connected, select switch two of the SW6 selection ends corresponding JL-terminals with RS485 communication modules respectively and
13rd pin of MAX232 chip is connected.
In conjunction with shown in Fig. 9, optocoupler and drive circuit include opto-coupler chip U7a and the opto-coupler chip that two models are TLP521-4
U7b and peripheral circuit thereof, and Darlington transistor U12a and Darlington transistor U12b that two models are ULN2003 and periphery electricity thereof
Road.Wherein, the of opto-coupler chip U7a the 2nd, the 4th, the 6th and the 8th pin is corresponding respectively is 74HC245D's with above-mentioned model
The 18th, the 11st, the of driving chip the 17th be connected with the 16th pin, the of this opto-coupler chip U7a the 13rd, the 11st, the 9th and
15th pin correspondence respectively is connected with the 1st～the 3rd pin of Darlington transistor U12a and the 1st pin of Darlington transistor U12b.
The of opto-coupler chip U7b the 2nd, the 4th, the 6th and the 8th pin corresponding with the driving chip that above-mentioned model is 74HC245D respectively
The 14th, the 15th, the 13rd be connected with the 12nd pin, the of this opto-coupler chip U7b the 15th, the 13rd, the 11st and the 9th pin divide
Correspondence is connected with the 4th～the 7th pin of Darlington transistor U12a.
In conjunction with shown in Figure 10, the POW of terminal block, OUT1, OUT2, OUT3, OUT4, OUT5, OUT6, OUT7, OUT8,
COM1 is that output interface connects outside 24V power supply and effect control relay coil reserved opening.TXD, RXD and SG are 485 and 232
Communication interface.EA, SIG-, SIG+, E-, E+ are pickup wire interface.ST and COM2 is 1 road I/O input signal interface,
For starting batching controller.L, PE and L are AC220V power interface.
In conjunction with shown in Figure 11, power circuit is mainly by wave filter, transformer, bridge rectifier, filter circuit and some voltage stabilizings
Circuit etc. are constituted, thus provide the required power supply such as+12V ,+5V for batching controller.
The course of work of above-mentioned batching controller is as follows:
1), after setting parameter, blending process is started.
2), open the thick throwing mouth treating the first material in dispensing simultaneously and thin throwing mouth carries out the input of the first material.
3), in launch process obtain weight sensor output instantaneous weight signal and MCU built-in temperature measurement module output work as
Front ambient temperature signal.
4), according to built-in AD conversion module, instantaneous weight signal and ambient temperature signal are transformed into corresponding data signal.
5) after, the instantaneous weight signal after to digitlization carries out moving average filter, according to the ambient temperature signal after digitlization
Temperature-compensating is carried out to the instantaneous weight signal after moving average filter.Specifically can be according to formula y=y-k* Δ t to moving average
Filtered instantaneous weight signal carries out temperature-compensating, and wherein, y is instantaneous weight, and k is that temperature compensation coefficient (can be according to greatly
Amount experiment draws), Δ t current time.
6), accumulation calculating is carried out to the instantaneous weight signal after temperature-compensating, and judge whether current accumulator weight reaches the first
The thick of material throws threshold value, if reached, then closes the thick of the first material and throws mouth.
7), judging whether current accumulator weight reaches total injected volume of the first material, if reached, then closing the first material
Thin throw mouth.
8), according to release sequence and carry out treating the input of unclassified stores in dispensing according to aforesaid way.
9), export discharging signal to silo so that it is discharging, complete Primary batching system process.
The batching controller of the present invention is particularly suitable for the batching control process of concrete-agitating and asphalt equipment, also simultaneously
It is applicable to converter and chemical industry, feed etc. need the occasion of batching control.
Above embodiment is only to be described the preferred embodiment of the present invention, is not defined the scope of the present invention,
On the premise of designing spirit without departing from the present invention, it is each that technical scheme is made by this area ordinary skill technical staff
Plant deformation and improve, all should fall in the protection domain that claims of the present invention determines.
Claims (10)
1. a batching controller, it is characterised in that include:
Sensor input, for receiving the instantaneous weight signal of weight sensor output；
Filter circuit, for filtering the High-frequency Interference in described instantaneous weight signal；
Amplifying circuit, is amplified for the instantaneous weight signal after processing described filter circuit；
MCU, prestoring needs total injected volume of every kind of material in dispensing, the thick of every kind of material and throws threshold value, Yi Jisuo
There is the release sequence of material, be used in launch process, obtain described instantaneous weight signal and described MCU is built-in
Temperature measurement module output current outside temperature signal, according to built-in AD conversion module by described instantaneous weight
Signal and described ambient temperature signal are transformed into corresponding data signal, the instantaneous weight letter after to digitlization
After number carrying out moving average filter, according to the ambient temperature signal after digitlization to the wink after moving average filter
When weight signal carry out temperature-compensating, accumulation calculating, and root are carried out to the instantaneous weight signal after temperature-compensating
Carry out according to thick threshold value, total injected volume of corresponding material and the release sequence of throwing of current accumulator weight, corresponding material
Throw in control；
Display driver circuit, shows to charactron for the accumulator weight transmission calculating described MCU in real time
Show；
Optocoupler and drive circuit, for carrying out anti-interference isolation rear drive by the control signal of described MCU output
Output；
Keyboard circuit, is used for arranging meter parameter, and described meter parameter includes treating the total of every kind of material in dispensing
Injected volume, the thick release sequence throwing threshold value and all materials of every kind of material.
2. batching controller according to claim 1, it is characterised in that described according to digitlization after
Ambient temperature signal carries out temperature-compensating to the instantaneous weight signal after moving average filter, specifically includes:
According to formula y=y-k* Δ t, temperature-compensating is carried out to the instantaneous weight signal after moving average filter, its
In, y is instantaneous weight, and k is temperature compensation coefficient, Δ t current time.
3. batching controller according to claim 2, it is characterised in that also include:
It for RS232 communication module and the RS485 communication module of described MCU and upper machine communication, and is used for
The communication switching circuit of the inter mode switching of described RS232 communication module and described RS485 communication module, described
The communication switching circuit one end phase with one end of described RS232 communication module and described RS485 communication module respectively
Even, it and is connected with described MCU by serial ports.
4. batching controller according to claim 3, it is characterised in that also include:
Protection circuit, for carrying out anti-interference place to the signal inputting or exporting described RS485 communication module
Reason, described protection circuit respectively with the other end of described RS232 communication module and described RS485 communication module
The other end is connected.
5. batching controller according to claim 4, it is characterised in that also include:
Terminal block, it is integrated with described optocoupler and drive circuit, the input of described protection circuit or output
Son.
6. the ingredient control method of batching controller described in a claim 1, it is characterised in that include with
Lower step:
Open simultaneously and treat that in dispensing, the thick of the first material is thrown mouth and carefully throw the throwing that mouth carries out the first material described
Put；
The instantaneous weight signal of weight sensor output and the thermometric that described MCU is built-in is obtained in launch process
The current outside temperature signal of module output；
It is right to be transformed into described instantaneous weight signal and described ambient temperature signal according to built-in AD conversion module
The data signal answered；
After instantaneous weight signal after to digitlization carries out moving average filter, according to the external world after digitlization
Temperature signal carries out temperature-compensating to the instantaneous weight signal after moving average filter；
Accumulation calculating is carried out to the instantaneous weight signal after temperature-compensating, and judges whether current accumulator weight reaches
Thick to the first material described throws threshold value, if reached, then closes the thick of the first material described and throws mouth；
Judging whether current accumulator weight reaches total injected volume of the first material described, if reached, then closing
Close the thin of the first material described and throw mouth；
According to release sequence and according to aforesaid way carry out described in treat the input of unclassified stores in dispensing.
7. ingredient control method according to claim 6, it is characterised in that described according to digitlization after
Ambient temperature signal temperature-compensating is carried out to the instantaneous weight signal after moving average filter, specifically include:
According to formula y=y-k* Δ t, temperature-compensating is carried out to the instantaneous weight signal after moving average filter, its
In, y is instantaneous weight, and k is temperature compensation coefficient, Δ t current time.
8. ingredient control method according to claim 6, it is characterised in that described batching controller is also
Including:
RS232 communication module and RS485 communication module, Yi Jiyong for described MCU and upper machine communication
In the communication switching circuit of the inter mode switching of described RS232 communication module and described RS485 communication module, institute
State communication switching circuit one end with one end of described RS232 communication module and described RS485 communication module respectively
It is connected, and be connected with described MCU by serial ports.
9. ingredient control method according to claim 8, it is characterised in that described batching controller is also
Including:
Protection circuit, for carrying out anti-interference place to the signal inputting or exporting described RS485 communication module
Reason, described protection circuit respectively with the other end of described RS232 communication module and described RS485 communication module
The other end is connected.
10. ingredient control method according to claim 9, it is characterised in that described batching controller is also
Including:
Terminal block, it is integrated with described optocoupler and drive circuit, the input of described protection circuit or output
Son.
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| CN201110214886.6A CN102410868B (en) | 2011-07-29 | 2011-07-29 | Batching controller and ingredient control method thereof |
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|---|---|---|---|
| CN201110214886.6A CN102410868B (en) | 2011-07-29 | 2011-07-29 | Batching controller and ingredient control method thereof |
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| CN102410868B true CN102410868B (en) | 2016-10-05 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102929238B (en) * | 2012-10-26 | 2016-03-16 | 重庆集慧电子科技有限公司 | Intelligence batching monitoring system |
| CN103915051B (en) * | 2012-12-29 | 2017-05-24 | 北京谊安医疗系统股份有限公司 | Method for controlling display of nixie tube |
| CN103616065B (en) * | 2013-11-08 | 2015-10-28 | 太原市风行测控技术有限公司 | A kind of batching control system |
| CN103922155B (en) * | 2014-04-17 | 2016-01-20 | 王凤堂 | Omnidistance control one material one scale dispensing equipment and distribution thereof |
| CN104313312B (en) * | 2014-10-13 | 2017-07-18 | 首钢总公司 | A kind of control method for pellet dispensing |
| CN106292555B (en) * | 2015-05-18 | 2018-11-02 | 梅特勒-托利多(常州)测量技术有限公司 | For packing, filling or dispensing control system and method |
| CN105091950B (en) * | 2015-09-22 | 2017-11-07 | 巫占海 | Temperature, thing position integrative detection instrument |
| CN106215796A (en) * | 2016-07-29 | 2016-12-14 | 太仓市璜泾新海农机专业合作社 | A kind of intelligence control system of forage compounding machine |
| CN108375409A (en) * | 2018-02-24 | 2018-08-07 | 浙江中控技术股份有限公司 | A kind of flow control method, server and system of feeding intake of weighing of material |
| CN110657873B (en) * | 2018-06-29 | 2024-05-24 | 福建南方路面机械股份有限公司 | Automatic weighing and proportioning device and using method thereof |
| CN109203210A (en) * | 2018-09-30 | 2019-01-15 | 中国水利水电科学研究院 | High-strength environmental protection brick production system auxiliary ingredients device for ecological sponge urban construction |
| CN110702194A (en) * | 2019-07-29 | 2020-01-17 | 辽宁维森信息技术股份有限公司 | High-speed weighing controller with automatic compensation function and control method |
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| CN2058748U (en) * | 1989-08-05 | 1990-06-27 | 沈有德 | High-accuracy automatic weigher for bulk material |
| US5801337A (en) * | 1996-01-11 | 1998-09-01 | Barnstead/Thermolyne Corporation | Method of and apparatus for compensating for load/environment temperature differential-induced measured load weight error |
| CN201442748U (en) * | 2009-06-25 | 2010-04-28 | 营口大和衡器有限公司 | Dosing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001165601A (en) * | 1999-12-09 | 2001-06-22 | Shimadzu Corp | Weight measuring device |
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|---|---|---|---|---|
| CN2058748U (en) * | 1989-08-05 | 1990-06-27 | 沈有德 | High-accuracy automatic weigher for bulk material |
| US5801337A (en) * | 1996-01-11 | 1998-09-01 | Barnstead/Thermolyne Corporation | Method of and apparatus for compensating for load/environment temperature differential-induced measured load weight error |
| CN201442748U (en) * | 2009-06-25 | 2010-04-28 | 营口大和衡器有限公司 | Dosing machine |
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