CN107218988A - The weighing instrument and its detection method of a kind of quick high accuracy - Google Patents
The weighing instrument and its detection method of a kind of quick high accuracy Download PDFInfo
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- CN107218988A CN107218988A CN201710481538.2A CN201710481538A CN107218988A CN 107218988 A CN107218988 A CN 107218988A CN 201710481538 A CN201710481538 A CN 201710481538A CN 107218988 A CN107218988 A CN 107218988A
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- 238000005303 weighing Methods 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 230000003321 amplification Effects 0.000 claims abstract description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 24
- 230000006870 function Effects 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 14
- 238000012935 Averaging Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 230000005428 wave function Effects 0.000 claims description 2
- 230000037396 body weight Effects 0.000 claims 1
- 238000013461 design Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/142—Circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1414—Arrangements for correcting or for compensating for unwanted effects
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- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a kind of weighing instrument of quick high accuracy and its detection method, power module, weighing sensor, low pass filter, signal amplifier, main control module are electrically connected with successively, weighing sensor uses electric bridge sensor, detect the weight signal of testee, faint weight signal is passed through to the filtering process of low pass filter, and by the amplification of signal amplifier, so that weight signal more rapidly, be accurately input in main control module and handled, software filtering is carried out to weight signal in main control module simultaneously, further such that signal is more accurate.
Description
Technical field
The present invention relates to a kind of weighing-appliance, the weighing instrument and its detection method of particularly a kind of quick high accuracy.
Background technology
The mode base of the weight signal of the detection testee of the high speed weighing balance heavy equipment such as existing high speed scale, combination balance
This uses special chip of weighing, and such as TI ADI7190 CS5532, weighing sensor connection must connect corresponding special
Chip of weighing, by these, special chip of weighing is direct to weighing-up wave changes, because input signal is by sensing
Device is directly exported, and the signal of sensor output is very faint, therefore there is obvious defect in terms of interference, shows several
According to defects such as the unstable, drift of collection, poor repeatabilities.
Meanwhile, all kinds of special chips of weighing are general to be designed just for testee for specific material, special
Weigh and fixed and specific parameter is provided with chip, this parameter then have impact on input signal gain, filtering in chip of weighing
Processing, such as it is general weigh gain of the chip to input signal when put using conditional (2 Nth powers) software
Greatly, the weigh chip correspondence certain material correspondence special per money, measures the weight of different materials, it is necessary to the corresponding title of corresponding configuration
Heavy equipment, causes its application to be extremely limited, measuring speed is slow in practical operation so that the data knot of processing
Fruit can not meet high speed, the requirement of high-precision and high-stability.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of weighing instrument of quick high accuracy and its detection side
Method.
The technical solution adopted by the present invention is：
A kind of weighing instrument of quick high accuracy, including at least one bridge type for detecting testee weight signal
It is weighing sensor, at least one power module, at least one low pass filter, at least one signal amplifier, main control module, logical
Output end is interrogated, the external power source of electric power source pair of module access enters line translation and thinks that weighing sensor, main control module are powered, weighing and sensing
Device, low pass filter, signal amplifier, main control module are electrically connected with successively, and the main control module is by communicating output end to outside
Weight signal of the equipment output after LPF and signal amplification.
The weighing sensor, low pass filter, signal amplifier include three groups, every group of weighing sensor, low pass filtered
Ripple device, signal amplifier correspondence are sequentially connected and every group of signal amplifier and main control module electric connection is with by weight signal
It is input in main control module.
The power module includes reduction voltage circuit and constant-current source circuit, the input and external power source of the reduction voltage circuit
It is electrically connected with, and will is master control module for power supply after the voltage step-down processing of input, while output end and the constant current of reduction voltage circuit
The input of source circuit is electrically connected with, and constant-current source circuit thinks that weighing sensor is powered for modulating constant current.
The constant-current source circuit includes comparator U5, and comparator U5 input and the output end of reduction voltage circuit electrically connect
Connect, the comparator U5 output end and weighing sensor are electrically connected with, comparator U5 feedback end and comparator U5 output
End is electrically connected with to keep the constant of electric current.
The A/D conversion electricity that the main control module includes main control chip, is electrically connected with respectively with main control chip, signal amplifier
Road, the storage mould for storing the several filter function pattern for instructing main control chip to handle the weight signal of input
Block, the main control chip is electrically connected with memory module, communication output end respectively.
The main control module also includes the selecting module for being used to choose filter function pattern in memory module, the selecting module
It is electrically connected with main control chip.
A kind of detection method of the weighing instrument of quick high accuracy, including at least one is for detecting testee weight signal
The weighing sensor of bridge type, at least one power module, at least one low pass filter, at least one signal amplifier,
Main control module, communication output end, power module are that weighing sensor, main control module are powered, weighing sensor, low pass filter,
Signal amplifier, main control module, communication output end are electrically connected with successively, weighing sensor detection testee weight signal, defeated
Enter to low pass filter and carry out hardware filtering processing and be input to after signal amplifier carries out signal enhanced processing to be output to master
Control in module, main control module carries out defeated to external equipment by communicating output end after software filtering processing to the weight signal of input
Go out.
The weighing sensor, low pass filter, signal amplifier include three groups, every group of weighing sensor, low pass filtered
Ripple device, signal amplifier correspondence are sequentially connected and every group of signal amplifier and main control module electric connection is with by weight signal
It is input in main control module, main control module receives every group of next weight signal of signal amplifier transmission and every group of weight is believed
Number software filtering processing is carried out, it is then the weight signal after software filtering is handled is defeated to external equipment by communicating output end
Go out.
The A/D conversion electricity that the main control module includes main control chip, is electrically connected with respectively with main control chip, signal amplifier
Road, the storage mould for storing the several filter function pattern for instructing main control chip to handle the weight signal of input
Block, the selecting module for choosing filter function pattern in memory module, the main control chip respectively with memory module, selecting module, logical
Interrogate output end to be electrically connected with, selecting module, which is sent, chooses signal to the filter function pattern in main control chip selection memory module,
Main control chip receives weight signal and carries out software filtering processing to weight signal with the filter function pattern of selection, then will be through
The weight signal crossed after software filtering processing is exported by communicating output end to external equipment.
The filter function pattern includes Butterworth low pass wave mode and/or middle position value filtering pattern and/or arithmetic
Average filter pattern and/or recurrence average filter patterns and/or median average filter pattern and/or first-order lag filter patterns
And/or Weighted Recursive average filter pattern and/or Glitch Filter pattern and/or low-pass digital filter pattern.
Beneficial effects of the present invention：
Weighing instrument of the present invention, power module, weighing sensor, low pass filter, signal amplifier, main control module are electric successively
Property connection, weighing sensor uses electric bridge sensor, detects the weight signal of testee, faint weight signal is passed through
The filtering process of low pass filter, and by the amplification of signal amplifier so that weight signal more rapidly, is accurately input to
Handled in main control module, when there is multigroup signal to input, be conducive to main control module to carry out judgement processing.
Power module herein includes constant-current source circuit and powered for weighing sensor, it is to avoid the fluctuation of external power source or
Weighing sensor input error data caused by interference.
Several filter function pattern is stored in detection method, in memory module, the design is first to weighing sensor
The weight signal of input carries out hardware filtering processing, is input to after main control chip and weight signal is entered again according to filter function pattern
Row software filtering processing so that the weight result of final output is more reliable and more stable.
Brief description of the drawings
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of weighing instrument of the present invention.
Fig. 2 is the circuit diagram of main control module of the present invention.
Fig. 3 is the circuit diagram of power module of the present invention.
Fig. 4 is the circuit diagram of weighing sensor of the present invention, low pass filter, signal amplifier.
Fig. 5 is weighing instrument overhaul flow chart of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, weighing instrument of the present invention, including at least one and be used to detect the electric bridge of testee weight signal
The weighing sensor 1 of formula, at least one power module 2, at least one low pass filter 3, at least one signal amplifier 4, master
Module 5, communication output end 6 are controlled, the external power source of 2 pairs of accesses of power module enters line translation and thinks weighing sensor 1, main control module
5 power supplies, weighing sensor 1, low pass filter 3, signal amplifier 4, main control module 5 are electrically connected with successively, and the main control module 5 leads to
Cross communication output end 6 and export the weight signal after LPF and signal amplification, herein communication output to external equipment
End 6 can convey weight information to external equipments such as display screens.
Wherein, the design can be used by a weighing sensor 1, low pass filter 3, a signal amplifier 4
One group of signal input is constituted, the preferred embodiment of the design can be weighing sensor 1, low pass filter 3, signal amplifier
4 include three groups, and every group of weighing sensor 1, low pass filter 3, the correspondence of signal amplifier 4 are sequentially connected and every group of signal
Amplifier 4 is electrically connected with so that weight signal is input in main control module 5 with main control module 5, and the design can be disposably to more
Group testee is weighed, and is weighed more rapidly, can substantially reduce cost, reduces the volume of equipment.
Power module 2, weighing sensor 1, low pass filter 3, signal amplifier 4, main control module 5 are electrically connected with successively,
Weighing sensor 1 uses Wheatstone bridge formula sensor, detects the weight signal of testee, and faint weight signal is passed through
The filtering process of low pass filter 3, and by the amplification of signal amplifier 4 so that weight signal more rapidly, is accurately inputted
Handled into main control module 5, when there is multigroup signal to input, be conducive to main control module 5 to carry out judgement processing.
On power module 2, as shown in figure 3, power module 2 includes reduction voltage circuit 21 and constant-current source circuit 22, it is described
The input of reduction voltage circuit 21 is electrically connected with external power source, and will be supplied after the voltage step-down processing of input for main control module 5
Electricity, while the output end of reduction voltage circuit 21 and the input of constant-current source circuit 22 are electrically connected with, constant-current source circuit 22 is used to modulate
Constant current thinks that weighing sensor 1 is powered, and power module 2 herein includes constant-current source circuit 22 and supplied for weighing sensor 1
Electricity, it is to avoid weighing sensor 1 input error data caused by the fluctuation or interference of external power source.
Reduction voltage circuit 21 herein can realize that the external 9V voltages of the design reduction voltage circuit 21 are electric by 9V using decompression chip
Pressure drop is powered to constant-current source circuit 22 is input to after 5V voltages, while carry 5V voltages dropping to 3.3V for main control module 5, constant-current source
Circuit 22 includes comparator U5, and comparator U5 input is electrically connected with the output end of reduction voltage circuit 21, comparator U5
Output end be electrically connected with weighing sensor 1, comparator U5 feedback end and comparator U5 output end be electrically connected with
The constant of electric current is kept, voltage stabilizing can also be carried out with voltage-stabiliser tube D1 before 5V input constant-current source circuits 22 herein.
As shown in figure 4, weighing sensor 1 (Wheatstone bridge formula) operation principle is when sensor external stress or occurs shape
During change, its electric bridge causes electric bridge not releveling, works as electric bridge because of external pressure or deformation generation change in resistance, the change of this resistance
Encouraged because of constant-current source circuit 22 outside, it will produce an output voltage.VO=IRg, VO is output voltage, and I is electric current, and Rg is
Bridge resistor knots modification.
By the above formula, output voltage does not have any relation with supply voltage, therefore I is steady state value, so defeated
Go out voltage and resistance knots modification into strict proportional relation.
The noise that low pass filter 3 is dried by electric capacity R10, R11, C14, C15 filtering external, uses LC LPFs electricity
Road, is mainly used in the filtering of sensor output signal, and filtering out High-frequency Interference composition makes weighing sensor 1 be input to signal amplifier
4 signal is actual signal, is preferably minimized influence of the external interference signals to signal, signal amplifier 4 passes through hardware AD620
Or the precision amplification of the instrument grade such as AD623, instrument grade low-noise accurate amplifier, for the faint voltage signal for exporting sensor
It is amplified, multiplication factor can be designed according to the parameter of sensor, from different accurate feedback resistances, increases amplification
Benefit reaches optimum value, and wherein the design preferably can make its Full-span output reach 2V, while avoiding using special chip of weighing
Gain be limited to 2 Nth power software amplification so that result is more accurate.
As shown in figure 1, main control module 5 electrically connects including main control chip 51, respectively with main control chip 51, signal amplifier 4
The A/D change-over circuits 52 that connect, store several filter for instructing the weight signals of 51 pairs of inputs of main control chip to be handled
The memory module 53 of wave function pattern, the main control chip 51 is electrically connected with memory module 53, communication output end 6 respectively.
Main control module 51 also includes the selecting module 54 for being used to choose filter function pattern in memory module 53, the selection mould
Block 54 is electrically connected with main control chip 51, and selecting module 54 herein can be to provide the function button that user is manipulated.
Main control module 51 also includes the selecting module 54 for being used to choose filter function pattern in memory module 53, the selection mould
Block 54 is electrically connected with main control chip 51.
The detection method of the design is as follows：As shown in figure 5, weighing sensor 1 detects testee weight signal, it is input to
Low pass filter 3 carries out hardware filtering processing and is input to after signal amplifier 4 carries out signal enhanced processing to be output to master control
In module 5, the weight signal of 5 pairs of inputs of main control module is carried out after software filtering processing by communicating output end 6 to external equipment
Output.
If there is multigroup input, every group of weighing sensor 1, low pass filter 3, the correspondence of signal amplifier 4 are sequentially connected
And every group of signal amplifier 4 is electrically connected with so that weight signal is input in main control module 5 with main control module 5, master control mould
Block 5 by different serial ports receive respectively the transmission of every group of signal amplifier 4 come weight signal and weight signal to every group
Software filtering processing is carried out, then the weight signal after software filtering is handled is defeated to external equipment by communicating output end 6
Go out.
User can be sent by selecting module 54 chooses signal to the filtering in the selection memory module 53 of main control chip 51
Function mode, main control chip 51 receives weight signal and carries out software filtering to weight signal with the filter function pattern of selection
Processing, then the weight signal after software filtering is handled is exported by communicating output end 6 to external equipment.
The filter function pattern of the design include Butterworth low pass wave mode and/or middle position value filtering pattern and/or
Digital averaging filtering pattern and/or recurrence average filter patterns and/or the filtering of median average filter pattern and/or first-order lag
Pattern and/or Weighted Recursive average filter pattern and/or Glitch Filter pattern and/or low-pass digital filter pattern.
Wherein, middle position value filtering pattern is：Continuous sampling n times (N takes odd number), are sized n times sampled value, in taking
Between value be this virtual value.
Digital averaging filtering pattern is：Continuously take N number of sampled value to carry out average calculating operation, when N values are larger, signal smoothing degree compared with
Height, but sensitivity is relatively low；When N values are smaller, signal smoothing degree is relatively low, but sensitivity is higher.
Recurrence average filter patterns are：Continuously taking N number of sampled value to regard a queue as, the length of queue is fixed as N, often
It is secondary to sample a new data and be put into tail of the queue, and a data (first in first out) of original head of the queue is thrown away, N number of number in queue
According to progress arithmetic average computing, so that it may obtain new filter result.
Median average filter pattern is：Equivalent to middle position value filtering+digital averaging filtering, the N number of data of continuous sampling are gone
Fall a maximum and a minimum value, then calculate the arithmetic mean of instantaneous value of N-2 data.
First-order lag filter patterns are：A=0-1 is taken, this filter result=(1-a) * this sampled value+a* last time filters
As a result.
Weighted Recursive average filter pattern：Improvement to recurrence average filter method, i.e., data not in the same time are subject to difference
Power, be typically that closer to the data of current moment, power obtains bigger, and the weight coefficient for giving new sampled value is bigger, then sensitivity is got over
Height, but signal smoothing degree is lower.
Glitch Filter pattern is：One filtering counter is set, each sampled value compared with the currently active value, if adopted
Sample value=the currently active value, then counter O reset if sampled value is more than or less than the currently active value, counter+1, and is sentenced
Whether disconnected counter is more than or equal to upper limit N (spilling), if counter overflow, and this sub-value is replaced into the currently active value, and
Clear counter.
Low-pass digital filter pattern is：First-order lag is filtered, and n-th sampling post filtering readout is that (1-a) multiplies N
Secondary sampled value adds a to be multiplied by time filter result output valve.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to above-mentioned embodiment, as long as with
Essentially identical means realize that the technical scheme of the object of the invention is belonged within protection scope of the present invention.
Claims (10)
1. a kind of weighing instrument of quick high accuracy, it is characterised in that：It is used to detect testee weight signal including at least one
The weighing sensor (1) of bridge type, at least one power module (2), at least one low pass filter (3), at least one letter
Number amplifier (4), main control module (5), communication output end (6), power module (2) enter line translation to the external power source of access and thought
Weighing sensor (1), main control module (5) power supply, weighing sensor (1), low pass filter (3), signal amplifier (4), master control
Module (5) is electrically connected with successively, and the main control module (5) passes through LPF by communicating output end (6) and being exported to external equipment
And the weight signal after signal amplification.
2. a kind of weighing instrument of quick high accuracy according to claim 1, it is characterised in that：The weighing sensor (1),
Low pass filter (3), signal amplifier (4) include three groups, and every group of weighing sensor (1), low pass filter (3), signal are put
Big device (4) correspondence is sequentially connected and every group of signal amplifier (4) is electrically connected with so that weight signal is defeated with main control module (5)
Enter into main control module (5).
3. a kind of weighing instrument of quick high accuracy according to claim 1, it is characterised in that：Power module (2) bag
Reduction voltage circuit (21) and constant-current source circuit (22) are included, input and the external power source of the reduction voltage circuit (21) are electrically connected with,
And will be main control module (5) power supply after the voltage step-down processing of input, while the output end and constant-current source of reduction voltage circuit (21)
The input of circuit (22) is electrically connected with, and constant-current source circuit (22) thinks that weighing sensor (1) is powered for modulating constant current.
4. a kind of weighing instrument of quick high accuracy according to claim 3, it is characterised in that：The constant-current source circuit (22)
Including comparator U5, comparator U5 input is electrically connected with the output end of reduction voltage circuit (21), and comparator U5's is defeated
Go out end to be electrically connected with weighing sensor (1), comparator U5 feedback end is electrically connected with to protect with comparator U5 output end
Hold the constant of electric current.
5. a kind of weighing instrument of quick high accuracy according to claim 1, it is characterised in that：Main control module (5) bag
Include main control chip (51), the A/D change-over circuits (52) being electrically connected with respectively with main control chip (51), signal amplifier (4), storage
There is the memory module of the several filter function pattern for instructing main control chip (51) to handle the weight signal of input
(53), the main control chip (51) is electrically connected with memory module (53), communication output end (6) respectively.
6. a kind of weighing instrument of quick high accuracy according to claim 5, it is characterised in that：The main control module (51) is also
Including the selecting module (54) for choosing filter function pattern in memory module (53), the selecting module (54) and main control chip
(51) it is electrically connected with.
7. a kind of detection method of the weighing instrument of quick high accuracy, it is characterised in that：It is used to detect measured object including at least one
The weighing sensor (1) of the bridge type of body weight signal, at least one power module (2), at least one low pass filter (3),
At least one signal amplifier (4), main control module (5), communication output end (6), power module (2) are weighing sensor (1), master
Control module (5) power supply, weighing sensor (1), low pass filter (3), signal amplifier (4), main control module (5), communication output
End (6) is electrically connected with successively, weighing sensor (1) detection testee weight signal, is input to low pass filter (3) and is carried out firmly
Part filtering process and be input to signal amplifier (4) carry out signal enhanced processing after be output in main control module (5), master control mould
Block (5) is exported after carrying out software filtering processing to the weight signal of input by communicating output end (6) to external equipment.
8. a kind of detection method of the weighing instrument of quick high accuracy according to claim 7, it is characterised in that：It is described to weigh
Sensor (1), low pass filter (3), signal amplifier (4) include three groups, every group of weighing sensor (1), low pass filter
(3), signal amplifier (4) correspondence is sequentially connected and every group of signal amplifier (4) and main control module (5) is electrically connected with will
Weight signal is input in main control module (5), and main control module (5) receives the weight signal that every group of signal amplifier (4) transmission comes
And software filtering processing is carried out to every group of weight signal, then the weight signal after software filtering is handled is passed through into communication
Output end (6) is exported to external equipment.
9. a kind of detection method of the weighing instrument of quick high accuracy according to claim 7, it is characterised in that：The master control
Module (5) includes main control chip (51), the A/D change-over circuits being electrically connected with respectively with main control chip (51), signal amplifier (4)
(52), store for the several filter function pattern that instructs main control chip (51) to handle the weight signal of input
Memory module (53), the selecting module (54) for choosing filter function pattern in memory module (53), the main control chip (51) is respectively
With memory module (53), selecting module (54), communication output end (6) be electrically connected with, selecting module (54) send choose signal to
Main control chip (51) chooses the filter function pattern in memory module (53), and main control chip (51) receives weight signal and to select
The filter function pattern taken carries out software filtering processing to weight signal, then the weight signal after software filtering is handled is led to
Communication output end (6) is crossed to export to external equipment.
10. a kind of detection method of the weighing instrument of quick high accuracy according to claim 9, it is characterised in that：The filter
Wave function pattern include Butterworth low pass wave mode and/or middle position value filtering pattern and/or digital averaging filtering pattern and/
Or recurrence average filter patterns and/or median average filter pattern and/or first-order lag filter patterns and/or Weighted Recursive it is flat
Equal filter patterns and/or Glitch Filter pattern and/or low-pass digital filter pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710481538.2A CN107218988A (en) | 2017-06-22 | 2017-06-22 | The weighing instrument and its detection method of a kind of quick high accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710481538.2A CN107218988A (en) | 2017-06-22 | 2017-06-22 | The weighing instrument and its detection method of a kind of quick high accuracy |
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| CN107218988A true CN107218988A (en) | 2017-09-29 |
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| CN201710481538.2A Pending CN107218988A (en) | 2017-06-22 | 2017-06-22 | The weighing instrument and its detection method of a kind of quick high accuracy |
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| CN116184968A (en) * | 2023-04-24 | 2023-05-30 | 山东星峰面粉机械有限公司 | Production control method and system for corn cooked powder production line |
| CN117647826A (en) * | 2024-01-29 | 2024-03-05 | 成都星历科技有限公司 | Navigation deception jamming signal detection system and method based on jamming source positioning |
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