CN110274672A - A kind of wide range weighing device and its method based on electromagnetic force equilibrium principle - Google Patents
A kind of wide range weighing device and its method based on electromagnetic force equilibrium principle Download PDFInfo
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- CN110274672A CN110274672A CN201910641084.XA CN201910641084A CN110274672A CN 110274672 A CN110274672 A CN 110274672A CN 201910641084 A CN201910641084 A CN 201910641084A CN 110274672 A CN110274672 A CN 110274672A
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- 238000005303 weighing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 239000000806 elastomer Substances 0.000 claims abstract description 25
- 238000013016 damping Methods 0.000 claims abstract description 14
- 238000012795 verification Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/26—Counterweights; Poise-weights; Sets of weights; Holders for the reception of weights
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
- G01G7/02—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of wide range weighing devices and its method based on electromagnetic force equilibrium principle, device includes damping base, the elastomer with Luo Baiweier architectural characteristic being connected in damping base, the counter-jib being connected on elastomer, the flexible fulcrum being connected in the middle part of counter-jib, the front end of counter-jib is equipped with a U-shaped fork, rear end is equipped with verification component, and one act on counter-jib front end electromagnet, one is additionally provided in damping base for detecting the light-sensitive element of U-shaped fork light passing variation, PID control circuit module, and the MCU control module of the photosensor signal for detecting PID control circuit module feedback electromagnet；The front end of counter-jib is also connected with a weight arm.The wide range meausring apparatus and its method based on electromagnetic force equilibrium principle, are arranged weight arm on counter-jib, to offset the weighing range of scale pan equal loss, to increase its range of weighing while guaranteeing detection accuracy.
Description
Technical field
The present invention relates to electromagnetism weight detection equipment technical fields more particularly to a kind of based on the big of electromagnetic force equilibrium principle
Range weighing device and its method.
Background technique
Electromagnetic force balance sensor is a kind of high-precision weighing sensor, is used for high-precision Weighing occasion, electricity
Magnetometric sensor is adjusted by the way of PID adjusting, by the weight for being converted into object to the electrical signal detection in adjusting
Amount.But existing electro magnetic force sensor is due to the limitation of processing method and own material, have no idea in practical applications into
The heavy weight detection of row, especially weighing platform are self-possessed larger situation, its range of weighing is caused to narrow.
Summary of the invention
In order to meet above-mentioned requirements, the wide range weighing based on electromagnetic force equilibrium principle that it is an object of that present invention to provide a kind of
Devices and methods therefor.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of wide range weighing device based on electromagnetic force equilibrium principle comprising damping base is connected to the damping
The elastomer with Luo Baiweier architectural characteristic on pedestal, the counter-jib being connected on the elastomer are connected to described flat
Flexible fulcrum in the middle part of weighing apparatus arm, the front end of the counter-jib are equipped with a U-shaped fork, and rear end is acted on equipped with verification component and one
The electromagnet of the front end of the counter-jib；Wherein, one is additionally provided in the damping base for detecting the U-shaped fork light passing variation
Light-sensitive element, for the conversion amplification of the photosensor signal of the light-sensitive element to be fed back to the PID control circuit of the electromagnet
Module, and the MCU control module of the photosensor signal for detecting the PID control circuit module feedback electromagnet；It is described flat
The front end of weighing apparatus arm is also connected with a weight arm, by the weight arm additional weight to offset on elastomer peripheral hardware carry quilt
The weighing range for weighing the load carrier of object and being lost.
Wherein, the number of counter-jib is two on the elastomer, is fixedly connected between counter-jib by connecting rod, middle part is common
It is connected to same flexible fulcrum.
Wherein, the verification component includes: the limit plate being connected in the damping base, set on the rear end of two counter-jibs
Between counterweight, be connected to the sliding block of the counterweight, the sliding block is equipped with through-hole, the motor being fixed on the limit plate, with
And it is connected to the cam on the motor output shaft, the cam is plugged in the through-hole on the sliding block, the motor rotation, band
Moving cam rotation, cam and through-hole cooperation driving slide plate lowering action so that the counterweight is placed on counter-jib, carry out it is initial or
Error checking.
Wherein, the horizontal limit plate for stretching to elastomeric apex is additionally provided on the counter-jib.
Wherein, a wheel disc is additionally provided between the front end of the counter-jib and U-shaped fork, the wheel disc is located at the magnetic force of electromagnet
Right above direction.
Wherein, the PID control circuit module includes the differential amplifier circuit being electrically connected with the light-sensitive element, with
And the PID connecting with differential amplifier circuit adjusts circuit.
Wherein, the MCU control circuit includes sampling resistor, the A/D conversion circuit connecting with sampling resistor, is turned with A/D
Change the MCU of circuit connection.
A kind of wide range weighing method based on electromagnetic force equilibrium principle, based on as described above based on electromagnetic force equilibrium
The wide range weighing device of principle, comprising the following steps:
Step S1, according on elastomer peripheral hardware carrying be weighed object load carrier weight, the counterweight on weight arm,
To offset the weighing range being lost on elastomer；
Step S2, is driven by motor cam rotation, and the decline of synchronous drive counterweight is placed in counterweight on counter-jib, so as to right
MCU control module carries out initial weigh and verifies；
Step S3, by the placing object being weighed on the scale pan on elastomer, counter-jib deviates initial position therewith, by
Light-sensitive element detects the luminous flux of the U-shaped fork of counter-jib front end, the voltage signal synchronous transport of light-sensitive element to PID control circuit
Module；
Step S4 amplifies voltage signal by the PID control circuit module, and amplified signal is transmitted to
Electromagnet, the electromagnet obtains electric generation magnetic force, the front end of magnetic-adsorption counter-jib, so that counter-jib resets；
Step S5 samples the photoactive voltage signal for feeding back to electromagnet by MCU control module, and MCU is according to sampling
Signal calculates the corresponding weight by load-bearing object.
Compared with the prior art, the beneficial effects of the present invention are: should based on electromagnetic force equilibrium principle wide range weighing
Weight arm is arranged in devices and methods therefor on counter-jib, convenient for additionally being existed according to peripheral hardwares mechanisms such as the scales pan being set on elastomer
Counterweight on weight arm, to offset the weighing range of scale pan equal loss, to increase it while guaranteeing detection accuracy and weigh model
It encloses.In addition, being verified according to user demand to precision, by the way that verification component is arranged in the rear end of counter-jib to avoid growing
Structural Errors caused by phase use, the problem for causing to weigh inaccuracy.
The invention will be further described in the following with reference to the drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the schematic illustration of the wide range weighing device of the invention based on electromagnetic force equilibrium principle.
Fig. 2 and Fig. 3 is the schematic perspective view of the wide range weighing device of the invention based on electromagnetic force equilibrium principle.
Fig. 4 is the side sectional view of the wide range weighing device of the invention based on electromagnetic force equilibrium principle.
Fig. 5 is the top view of the wide range weighing device of the invention based on electromagnetic force equilibrium principle.
Fig. 6 is the rear end part longitudinal sectional view of the wide range weighing device of the invention based on electromagnetic force equilibrium principle.
Fig. 7 is the flow chart of the wide range weighing method of the invention based on electromagnetic force equilibrium principle.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation
Invention is further described in detail for mode.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those skilled in the art's every other implementation obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be connection, may be a detachable connection, or integral；It can be mechanical connection,
It is also possible to be electrically connected；It can be directly connected, can also can be inside two elements indirectly connected through an intermediary
The interaction relationship of connection or two elements.For the ordinary skill in the art, it can manage as the case may be
Solve the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It is interpreted as that identical embodiment or example must be directed to.Moreover, particular features, structures, materials, or characteristics described
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, those skilled in the art can
Different embodiments or examples described in this specification are engaged and be combined.
Please refer to Fig. 2 to Fig. 6, the wide range weighing device based on electromagnetic force equilibrium principle of the embodiment comprising subtract
Pedestal 01 is shaken, the elastomer 02 with Luo Baiweier architectural characteristic being connected in the damping base 01 is connected to the bullet
Property body 02 on counter-jib 03, be connected to the flexible fulcrum at 03 middle part of the counter-jib, the front end of the counter-jib 03 is equipped with a U
Type fork 031, rear end acts on the electromagnet 06 of the front end of the counter-jib 03 equipped with verification component 04 and one；Wherein, described
It is additionally provided with one in damping base 01 for detecting the light-sensitive element 07 of the U-shaped fork 031 light passing variation, is used for the photosensitive member
The photosensor signal conversion amplification of part 07 feeds back to PID control circuit module (PID control circuit detection module of the electromagnet
Principle is described further in Fig. 1), and for detecting the photosensitive of the PID control circuit module feedback electromagnet 07
The MCU control module of signal (MCU control module is hereinafter further described according to Fig. 1 schematic diagram)；The counter-jib 03
Front end is also connected with a weight arm 05, by the weight arm 05 additional weight to offset on elastomer 02 peripheral hardware carry quilt
The weighing range for weighing the load carrier of object and being lost, such as the scale pan being arranged on elastomer 02.
Referring to Fig. 3, the number of counter-jib 03 is two on the elastomer 02, solid by connecting rod between counter-jib 03
Fixed connection, middle part are commonly connected to same flexible fulcrum.It is for the ease of whole enterprising using two or more counter-jibs 03
Row balance, two or more counter-jibs cooperate with electromagnet 07, verification component 04 jointly, to guarantee the accuracy weighed, prevent
Error caused by only the both ends of counter-jib tilt outward.
Referring to Fig. 6, the verification component 04 includes: the limit plate 045 being connected in the damping base 01, if
The counterweight 041 between the rear end of two counter-jibs 03, is connected to the sliding block 044 of the counterweight 041, and the sliding block 044 is equipped with logical
Hole 0441, the motor 042 being fixed on the limit plate 045, and the cam 043 being connected on 042 output shaft of motor,
The cam 043 is plugged in the through-hole 0441 on the sliding block 0444, and the motor 042 rotates, and band moving cam 043 rotates, convex
Wheel 043 carries out initial with cooperation driving 044 lowering action of slide plate of through-hole 0441 so that the counterweight 041 is placed on counter-jib 03
Or error checking.That is, being the standard weights of counterweight 041 according to initial position, school is carried out to the calculated weight of MCU control circuit
Standard, when original state, the weighing weight after the electric signal conversion of MCU detection should be zero.This be based on electromagnetic force equilibrium principle
Wide range meausring apparatus later period long-time use process in, due to the stress variation of each structure itself, also result in weighing and miss
Difference, therefore, later period are also required at any time calibrate zero position, carry out zero verification especially by counterweight.
Referring to Fig. 3, it is additionally provided with the horizontal limit plate 033 for stretching to 02 top of elastomer on the counter-jib 03, prevents
Only the excessive front end decline displacement for leading to counter-jib 03 of 07 suction of electromagnet is excessive.
In the present embodiment, a wheel disc 032, the wheel disc are additionally provided between the front end of the counter-jib 03 and U-shaped fork 031
032 is located at right above the magnetic force direction of electromagnet 07.Why, 032 structure of wheel disc is set, mainly according to the sense of electromagnet 07
The shape of coil is answered to match, electromagnetic force is to dissipate distribution around by overhang, therefore be arranged corresponding with induction coil
Wheel disc 032 moves down convenient for counter-jib 03 by magneticaction horizontal stable, quickly.
Referring to Fig. 1, it is somebody's turn to do the working principle of the wide range meausring apparatus based on magnetic balanced principle are as follows:
It includes device pedestal 1, is installed on the primary Weir structure 2 of sieve of device pedestal 1, is connect with the primary Weir structure 2 of sieve
Weighting platform 3, the crossbeam 4 connecting with the primary Weir structure 3 of sieve, the fulcrum structure 5 connecting with crossbeam 4 connect with crossbeam 4 and are located at branch
The balance weight 6 on 5 right side of point structure, connect with 4 structure end of crossbeam and is located at the electromagnetic part 7 on 6 right side of balance weight, and is located at
The permanent magnet 8 of 7 lower section of electromagnetic part；4 structure end of crossbeam is equipped with anti-dazzling screen 9, and 9 side of anti-dazzling screen is equipped with photosensitive second level
Pipe group 10, the photodiode group 10 are connected with PID control circuit module, and the PID control circuit module and electromagnetic part 7 connect
It connects, the electromagnetic part 7 is also connected with MCU control circuit, and the MCU control circuit is used to acquire the electrical current of electromagnetic part 7.
Specifically, Luo Bai Weir mechanism (structure) is to be proposed and by the primary Weir of French physician sieve with the name of himself
And name.The mechanism and principle are that theoretical basis has been established in the design of counter scale and Roberval's balance and manufacture already.This programme is adopted
With application of the Luo Bai Weir mechanism on device pedestal for realizing the purpose of scheme.Fig. 1 is the device of the invention structural principle
Figure, centroid position is immediately below fulcrum structure 5 when apparatus structure balances, and weighting platform adds object, and centroid position upper right side is mobile, can produce
The torque of raw deflection realizes the measurement for weight of object so that crossbeam 4 is swung around mass center.
As shown in Figure 1, the PID control circuit module includes, the difference being electrically connected with the photodiode group 10
Amplifying circuit 11, and the PID connecting with differential amplifier circuit 11 adjust circuit 12.
The electromagnetic part 7 includes the connection structure 72 connecting with crossbeam 4, and is wound in the coil outside connection structure 72
71, the coil 71 adjusts circuit 12 with PID and connect.Specifically, electric current needed for the coil 71 generates magnetic field is by PID tune
Economize on electricity road 12 generates, and is transmitted to coil 71, and coil 71 is made to be powered by electromagnetic force.
Specifically, the connection structure 72 is fixedly connected with crossbeam 4, enables the quilt when coil is by electromagnetic force of crossbeam 4
Attract, thus back down to initial position.
The MCU control circuit includes sampling resistor 13, the A/D conversion circuit 14 connecting with sampling resistor 13, is turned with A/D
Change the MCU and interface circuit 15 of the connection of circuit 14.Wherein, the electric current in coil 71 flows through sampling resistor 13 connected in series and is turned
It is changed to voltage signal, sending to A/D conversion circuit 14 becomes digital quantity, and display and corresponding control driving electricity are sent after MCU is handled
Road, data acquisition and control action.
Referring to Fig. 7, the present embodiment also discloses a kind of wide range weighing method based on electromagnetic force equilibrium principle, base
In as described above based on the wide range weighing device of electromagnetic force equilibrium principle, comprising the following steps:
Step S1, according on elastomer peripheral hardware carrying be weighed object load carrier weight, the counterweight on weight arm,
To offset the weighing range being lost on elastomer；
Step S2, is driven by motor cam rotation, and the decline of synchronous drive counterweight is placed in counterweight on counter-jib, so as to right
MCU control module carries out initial weigh and verifies；
Step S3, by the placing object being weighed on the scale pan on elastomer, counter-jib deviates initial position therewith, by
Light-sensitive element detects the luminous flux of the U-shaped fork of counter-jib front end, the voltage signal synchronous transport of light-sensitive element to PID control circuit
Module；
Step S4 amplifies voltage signal by the PID control circuit module, and amplified signal is transmitted to
Electromagnet, the electromagnet obtains electric generation magnetic force, the front end of magnetic-adsorption counter-jib, so that counter-jib resets；
Step S5 samples the photoactive voltage signal for feeding back to electromagnet by MCU control module, and MCU is according to sampling
Signal calculates the corresponding weight by load-bearing object.
Compared with the prior art, the beneficial effects of the present invention are: should based on electromagnetic force equilibrium principle wide range weighing
Weight arm is arranged in devices and methods therefor on counter-jib, convenient for additionally being existed according to peripheral hardwares mechanisms such as the scales pan being set on elastomer
Counterweight on weight arm, to offset the weighing range of scale pan equal loss, to increase it while guaranteeing detection accuracy and weigh model
It encloses.In addition, being verified according to user demand to precision, by the way that verification component is arranged in the rear end of counter-jib to avoid growing
Structural Errors caused by phase use, the problem for causing to weigh inaccuracy.
It will be apparent to those skilled in the art that it is various that other can be made according to the above description of the technical scheme and ideas
It is corresponding to change and deformation, and all these change and deformation should belong to the claims in the present invention protection scope it
It is interior.
Claims (8)
1. a kind of wide range weighing device based on electromagnetic force equilibrium principle, which is characterized in that including damping base, be connected to institute
The elastomer with Luo Baiweier architectural characteristic in damping base is stated, the counter-jib being connected on the elastomer is connected to
Flexible fulcrum in the middle part of the counter-jib, the front end of the counter-jib are equipped with a U-shaped fork, and rear end is equipped with verification component, Yi Jiyi
Act on the electromagnet of the front end of the counter-jib；Wherein, it is logical for detecting the U-shaped fork that one is additionally provided in the damping base
The light-sensitive element of light variation, the PID for the photosensor signal conversion amplification of the light-sensitive element to be fed back to the electromagnet are controlled
Circuit module processed, and the MCU control module of the photosensor signal for detecting the PID control circuit module feedback electromagnet；
The front end of the counter-jib is also connected with a weight arm, by the weight arm additional weight to offset peripheral hardware on elastomer
Carry the load carrier for being weighed object and the weighing range being lost.
2. as described in claim 1 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the elasticity
The number of counter-jib on body is two, is fixedly connected between counter-jib by connecting rod, and middle part is commonly connected to same flexible fulcrum.
3. as claimed in claim 2 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the verification
Component includes: the limit plate being connected in the damping base, and the counterweight between the rear end of two counter-jibs is connected to the weight
The sliding block of code, the sliding block is equipped with through-hole, the motor being fixed on the limit plate, and is connected to the motor output shaft
On cam, the cam is plugged in the through-hole on the sliding block, and the motor rotation, band moving cam rotates, cam and through-hole
Cooperation driving slide plate lowering action carries out initial or error checking so that the counterweight is placed on counter-jib.
4. as claimed in claim 2 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the balance
The horizontal limit plate for stretching to elastomeric apex is additionally provided on arm.
5. as described in claim 1 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the balance
A wheel disc is additionally provided between the front end of arm and U-shaped fork, the wheel disc is located at right above the magnetic force direction of electromagnet.
6. as described in claim 1 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the PID
Control circuit module includes the differential amplifier circuit being electrically connected with the light-sensitive element, and is connect with differential amplifier circuit
PID adjust circuit.
7. as described in claim 1 based on the wide range weighing device of electromagnetic force equilibrium principle, which is characterized in that the MCU
Control circuit includes sampling resistor, the A/D conversion circuit connecting with sampling resistor, the MCU connecting with A/D conversion circuit.
8. a kind of wide range weighing method based on electromagnetic force equilibrium principle, which is characterized in that based on any one of claim 1-7
Described in the wide range weighing device based on electromagnetic force equilibrium principle, comprising the following steps:
Step S1 is weighed the weight of the load carrier of object, the counterweight on weight arm, to support according to peripheral hardware carrying on elastomer
Disappear the weighing range being lost on elastomer；
Step S2, is driven by motor cam rotation, and the decline of synchronous drive counterweight is placed in counterweight on counter-jib, to control to MCU
Molding block carries out initial weigh and verifies；
Step S3, by the placing object being weighed on the scale pan on elastomer, counter-jib deviates initial position therewith, by photosensitive
The luminous flux of the U-shaped fork of element testing counter-jib front end, the voltage signal synchronous transport of light-sensitive element to PID control circuit mould
Block；
Step S4 amplifies voltage signal by the PID control circuit module, and amplified signal is transmitted to electromagnetism
Iron, the electromagnet obtains electric generation magnetic force, the front end of magnetic-adsorption counter-jib, so that counter-jib resets；
Step S5 samples the photoactive voltage signal for feeding back to electromagnet by MCU control module, MCU according to sampled signal,
Calculate the corresponding weight by load-bearing object.
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