CN2058482U - Electronic balance - Google Patents
Electronic balance Download PDFInfo
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- CN2058482U CN2058482U CN 89207514 CN89207514U CN2058482U CN 2058482 U CN2058482 U CN 2058482U CN 89207514 CN89207514 CN 89207514 CN 89207514 U CN89207514 U CN 89207514U CN 2058482 U CN2058482 U CN 2058482U
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- scale
- sensor
- electronic balance
- weights
- impeller
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Abstract
The utility model relates to an electronic balance controlled by a microcomputer and automatically calibrated. A step motor directly drives impellers to feed; the electronic balance is a technological balance displayed in a digital mode and adopts a low-precision sensing and amplifying element; the electronic balance can realize the automatic quantification of high-precision weighing. The electronic balance has simple and compact structure, little space occupation, convenient maintenance and adjustment, reliable operation, low cost and high precision. The precision can reach (+/-) 0.1%, and the working frequency is 240 times/hour. The electronic balance can be widely used for the packing balance weight of foodstuffs, food processing, cements, chemical industry and sugar industry, and the formulation balance weight of pharmacy departments, chemical departments, etc. The electronic balance is an ideal technological device realizing the modernization of equipment in the technical innovation of enterprises.
Description
The invention belongs to a kind of electronic scales of quantitative weighing.
Electronic scales of the present invention is to be used for the technology scale that production run is weighed to powder or the single-size amount of anticipating.This electronic constant scale generally is made up of feeding and metering two parts, wherein metering section has electronic surveying control system such as scale frame, scale bucket, the control gear, sensor and the amplification that open and close the scale sluice gate, processing, and pay-off is delivered to the material of storage bin in the title bucket on the scale frame.Prior art is described below:
One, sensing amplification original paper all adopts the high precision grade, and as 0.5 ton of electronic scales of 2 tons of electronic scales of Japan and Shanghai electromechanical research institute, sensor accuracy is 0.02%, the cost height.
The measuring system of two, weighing has following mode, the error compensation type electromagnetism is weighed, constant current source is monitored automatically, weigh in electromagnetic force compensation and electric capacity position, weigh according to giving the electromagnetic compensation that adds load and load the response current compensation, the analog signal of expressing load weight converts the electronic-weighing etc. of the A/D conversion of several subpulse strings to.These check weighing systems are all complicated.
Three, pay-off roughly has three kinds:
1. large and small spiral propeller combination feed mechanism, wherein king bolt is as main feed, minor spiral is as meticulous feeding, all to adjust the feeding amount of controlling the duration of runs of necessary electromotor separately, this technology is used in grain scientific research institution, Wuxi in 1989 microcomputer controlled flour quantitative mechanical scale.
2. the double-speed motor simple helix thruster feed mechanism of tending to act, this mechanism is to control the feeding amount duration of runs of adjusting motor two rotating speeds.This technology adopts in the flour quantitative mechanical scale of the U.S. BUHELR company that Beijing Sino-U.S. flour demonstration plant uses.
Above-mentioned two kinds of feed mechanisms all have supporting speed reduction unit, electromagnetic clutch and electromagnetic brake.
3. the feed mechanism of Induction Motor-Driven impeller material toggling and large and small valve combination.This technology is used in the flour quantitative mechanical scale that Beijing the 6th flour mill is introduced by Italy, and it adjusts the feeding amount to control large and small valve opening time length.
Above-mentioned three kinds of pay-offs, no matter be micro-processor controlled or the mechanical scale of electrical control, complex structure, size is bigger, and it is inconvenient to adjust maintenance, the manufacturing cost height, pushing precision is low.
The objective of the invention is to overcome the deficiencies in the prior art, the sensing amplifier element of a kind of employing for logical precision and the electronic constant scale of automatic electronic measurement system of demarcating of every scale and the direct impeller material toggling that drives of stepper motor are provided.
Its layout characteristics of electronic scales of the present invention is shown in figure one, claim above the frame (1) pay-off that stepping electricity (7) directly drives the material toggling impeller to be housed, the pressure transducer (8) that links with scale bucket (3), the weights (9) that periodically rises and falls sensor (8) is demarcated in the top of driver (8), the lever (10) that weights (9) is risen and fallen are subjected to electromagnet (11) control and electric control box (5).There are the scale bucket (3) and the control that link with sensor (8) to claim the drive link (13) that sluice gate (2) opens and closes in the scale frame, seal with iron plate around the scale frame.Drive link (13) and lever (10) all are subjected to electromagnet (11) control, make to demarcate weights and the interlocking of scale sluice gate interlock.Be specifically described as follows:
One, demarcates automatically
Shown in figure one, the weight of demarcating signaling (9) equals every scale quantitative values, it is risen and fallen by lever (10) control, timing signal, demarcating weights (9) falls on the sensor (8), the electric signal of sensor (8) is noted when weighing lever (10) by control circuit and will be demarcated weights (9) and lift, make it separating sensor (8), simultaneously, stepper motor (7) drives the feeding of material toggling impeller, flow into the weight of material of scale bucket (3), be added on the sensor (8) by pull bar (12), compare with the signal of timing signal record simultaneously, and judge weight of material whether near or reach calibration value, send out signal control step motor (7) by microcomputer again and add and change or stop operating, until satisfying error requirements.Rising and falling of lever (10) also by system controlled by computer, electromagnet (11) drives, and lever (10) and drive link (13) interlock, it is timing signal, lever (10) is fallen on the sensor (8) demarcation weights (9), and drive link (13) is opened the scale sluice gate, material is fallen by door lock pin (14).When weighing, electromagnet (11) lifts lever (10) and demarcates signaling (9), and drive link (13) pins the scale sluice gate (2) that restores by damper weight by door lock pin (14), stepper motor (7) rotation, impeller feeding.Weight of material passes on the sensor (8) by pull bar (12), and the electric signal of transmission rod (8) is imported microcomputer again, finishes a course of action.
Owing to weigh with to demarcate interlock cycle beat very short, generally finish in several seconds to tens of seconds the time interval, and every scale self-calibration all, thereby must very high requirement to non-linear, the hysteresis of sensor, creep, zero balance, zero drift, zero sensitivity drift etc., the zero drift of pair amplifier, the enlargement factor drift, item indexs such as white noise do not have high request yet.Therefore, the electronic measurement system of every scale standardization just can satisfy the requirement of high-precision weighing with the sensor of the most cheap operational amplifier and low precision, like this, manufacturing cost reduces significantly, can keep high weighing precision for a long time again.As long as guarantee that standardization code weight amount is accurate, alleged weight of material also can have good stability in the specification error scope in this programme.
Two, stepper motor directly drives the pay-off of material toggling impeller
The layout of pay-off and structural representation such as figure one among the present invention, shown in the figure two, this pay-off is fixed on the outer stepper motor (7) of impeller casing (4) by the Ye Zhuanxiang (4) that is with material inlet (6) with flange and forms in the direct impeller (17) of the axle by stepper motor (7) that impeller casing (4) is installed.Link to each other with storage bin above the inlet of pay-off (6), lower aperture communicates with scale bucket (3).Stepper motor (7) directly drives feed rotor (15) rotation, and the material that will be stored in the material inlet (6) is allocated to the following outlet of impeller casing (4), and falls into the scale bucket, reaches the purpose that material is given thus.Because the rotating speed of stepper motor (7) can be controlled, thereby saved reduction gearing mechanism, and stepper motor (7) is when pulse-free signal is imported, have the characteristic that keeps static moment again, this saves again in the prior art and supporting electromagnetic clutch and the electromagnetic brake of spiral propeller.As seen, adopt the pay-off of the direct drive impeller of stepper motor, simple and compact for structure, it is little to take up room, and fault is few, and is reliable, keeps in repair easy to adjust.Impeller blade does not have relative slippage with storeroom in impeller rotation material toggling process, thereby has guaranteed pushing precision.
The electronic surveying control system block diagram of automatic quantitative electronic scale is shown in figure six among the present invention, aspect principle, have no difference with general amplification, conversion, data processing dispatch control system, the sensor amplifier element of just selecting for use is low, low-cost sensor of precision and LM324 type operational amplifier, microcomputer is a MCS51 type single-chip microcomputer, stepper motor is the 110BF3 type, electromagnet is the MQ1-5153 type, and charactron shows.
Demarcation sign indicating number among the present invention can be according to material unit weight and packing or ingredients by weight selection.Pay-off, electronic measurement system quantitatively all can be general in 0.2～50 kilogram scope, transducer range is looked the tare weight that weighs and struggle against and is selected, and the size of mechanical systems such as scale frame scale bucket can suitably be selected according to the material volume size.
Automatic quantitative electronic scale of the present invention, its demarcation, feeding is weighed, the coordination of actions such as discharging and error are reported to the police and are controlled by the flow process that is solidificated in EPROM (ROM (read-only memory)) by microcomputer, and fault analysis and display routine are handled and controlled.
Automatic quantitative electronic scale of the present invention compared with prior art has sensor, the amplifier accuracy requirement is low, low cost of manufacture, compact conformation, reliable, weighing error is little, keeps in repair characteristics such as easy to adjust.The suitable technology scale of doing in the production procedure, weighting error can guarantee in ± 0.1%, frequency of operation is 200～240 times/hour, adjust easy to maintenance, cost is lower than similar scale, physical dimension is also little, install and simply save time, can make the batch weigher of industries such as chemical industry, pharmacy, batch scale in the time of also can doing packing such as flour, chemical industry, food, cement, sugaring, be during current these industry technologies are transformed, realize the ideal technology equipment of equipment modernization.
Description of drawings:
Figure one, is automatic quantitative electronic scale structural arrangement synoptic diagram;
Figure two, figure three, be automatic quantitative electronic scale pay-off front and side schematic view;
Figure four, are automatic quantitative electronic scale calibrating device front schematic view;
Figure five, are automatic quantitative electronic scale calibrating device side schematic view;
Figure six, are automatic quantitative electronic scale Measurement and Control System block diagram;
Figure seven, are the structural arrangement synoptic diagram of 0.1～1 kilogram of electronic constant scale.
Wherein: (1)--scale frame, (2)--scale sluice gate, (3)--scale bucket, (4)--impeller casing, (5)--control box, (6)--material inlet, (7)--stepper motor, (8)--sensor, (9)--demarcate weights, (10)--lever, (11)--electromagnet, (12)--pull bar, (13)--drive link, (14)--door lock pin, (15)--material toggling impeller, (16)--electromagnet, (17)-fork, (18)--the backing pin on the scale bucket.
Embodiment 1: be used for 25 kilograms of electronic scaless that flour processing is weighed and packed, demarcating weights (9) is 25 kilograms, sensor (8) selected range is 50 kilograms a shear beam type sensor, its accuracy class is 0.1%, the weights of the demarcating stroke (or demarcating when lifting and gap of sensor (8) of weights (9)) that rises and falls is 3 millimeters, interlock cycle beat such as demarcating and weigh is 15 seconds, per hour can weigh 240 times, stepper motor (7) is the 110BF3 type.Directly drive impeller (15) is rotated material toggling, per step is decided to be 1.5 °, and the feeding amount is 5 grams, and impeller blade is welded with aluminium matter alloy, its purpose is to prevent that build-up of static charges from causing that spark discharge causes dust fried cruelly, and operational amplifier is selected the MCS51 type for use.Drive the lever of demarcating weights (8).(10) electromagnet (11) is the MQ1--5131 type.Lever (10) rise and fall and with drive link (13) and the interlock of coupled door lock pin (14), promptly when electromagnet (11) discharges, demarcating weights (9) falls on the sensor (8), electronic scales is demarcated automatically, door lock pin (14) discharges simultaneously, scale sluice gate (2) is opened blanking under the flour action of gravity, behind the blanking, scale sluice gate (2) reposition voluntarily under the damper weight effect, at this moment, electromagnet (11) adhesive again, door lock pin (14) pins scale bucket (2), and lever (10) lifts demarcates weights (9), goes on foot the feeding of dynamo-electric machine drive impeller, so far, electronic scales is finished a weighing cycle.
Demarcate weights (9) and contact the structural representation at position with lever (10) termination shown in figure four, figure five, the V-type cutting edge of projection on lever (10) termination, cooperate with the recessed V-type groove of demarcating weights (9) opposite position, guaranteed the accurate location that demarcation weights (9) repeats to rise and fall.V-type groove on the V-type cutting edge of lever termination and the demarcation weights is made by high-abrasive material.
That this automatic quantitative electronic scale machine shape is of a size of is high 1.3 meters, long 0.7 meter, wide 0.6 meter.
Embodiment 2: be used for washing powder, milk powder, refined salt, 0.1～1 kilogram of electronic constant scale of weighing such as solid beverage.Shown in figure seven, electric control box (5) is housed above the scale frame, sensor (8), the pay-off that has stepper motor (7) impeller casing (4) and impeller (15), electromagnet (11) control is demarcated weights (9) and is risen and fallen, and demarcates the top of weights (9) in sensor (8).Spacing is 1 millimeter.Scale bucket (3) is equipped with in scale frame the inside, link to each other with sensor (8) by pull bar (12), electromagnet (16) is contained on the pull bar (12), its driving pendulum rod (17) swing, and making the backing pin (18) on the scale bucket (3) break away from supporting, material is laid particular stress on the discharging of overturning voluntarily.
The demarcation weights (9) of this scale is respectively 0.1 kilogram, 0.25 kilogram, 0.5 kilogram and several class such as 1 kilogram, sensor is selected the shear beam type sensor of 5 kilograms of ranges for use, accuracy class also is 0.1%, demarcating the weights stroke that rises and falls is 2 millimeters, and the beat of every scale was respectively 4～5.6 seconds, and per hour frequency is 640～900 times.Stepper motor (7) is the 70BF3-3C type, and per step is 1.5 °, and pushing precision is 1 gram, and impeller is looked its function and adopted aluminium matter alloy or plastic production.Operational amplifier, the components and parts of measuring systems such as single-chip microcomputer and 25 kilograms of electronic constant scales are general.Only the suction of electromagnet (11) and (16) is 1 kilogram.Its demarcation, is weighed at feeding, the do action process control of discharging and 25 kilograms of electronic scaless roughly the same, just more electromagnet (16) make the control signal of (17) swing.
This scale machine shape is of a size of high 0.5 meter, and is wide 0.3 meter, long 0.3 meter, heavily is 15 kilograms.
Claims (1)
1, a kind of by automatic calibration device, stepper motor driven automatic feeding, electric-control system, the electronic scale that the sensing amplifier element of general precision is formed, it is characterized in that said automatic calibration device forms by demarcating weights (9) and sensor (8), be provided with in the top of sensor (8) one equiponderant with every scale, and the demarcation weights (9) that can rise and fall, it is under the effect of electromagnet (11), make it to lift and fall by lever (10), timing signal, electromagnet (11) discharges, demarcating weights (9) falls on the sensor (8), the electric signal that sensor (8) sends is noted by microcomputer, demarcate, during weighing, electromagnet (11) adhesive, demarcate weights (9) and be lifted separating sensor (8), sensor (8) is connected with pull bar (12) with scale bucket (3), said automatic feeding, be by stepper motor (7), impeller (15) and impeller casing (4) are formed, impeller (15) is contained on the axle head of stepper motor (7), covered by impeller casing (4), material inlet (6) is arranged above the impeller casing, be provided with opening below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207514 CN2058482U (en) | 1989-05-19 | 1989-05-19 | Electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207514 CN2058482U (en) | 1989-05-19 | 1989-05-19 | Electronic balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2058482U true CN2058482U (en) | 1990-06-20 |
Family
ID=4864357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89207514 Withdrawn CN2058482U (en) | 1989-05-19 | 1989-05-19 | Electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2058482U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954831A (en) * | 2012-11-09 | 2013-03-06 | 北京邮电大学 | Drug weighing detection system |
| CN108827829A (en) * | 2018-04-19 | 2018-11-16 | 辽宁石油化工大学 | A kind of mud yield measurement method and device based on bentonite mud yield formula |
| CN115165054A (en) * | 2022-06-30 | 2022-10-11 | 哈尔滨体育学院 | Sports nutrient component quantifying device based on physical training of athletes and use method thereof |
-
1989
- 1989-05-19 CN CN 89207514 patent/CN2058482U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954831A (en) * | 2012-11-09 | 2013-03-06 | 北京邮电大学 | Drug weighing detection system |
| CN102954831B (en) * | 2012-11-09 | 2015-01-07 | 北京邮电大学 | Drug weighing detection system |
| CN108827829A (en) * | 2018-04-19 | 2018-11-16 | 辽宁石油化工大学 | A kind of mud yield measurement method and device based on bentonite mud yield formula |
| CN115165054A (en) * | 2022-06-30 | 2022-10-11 | 哈尔滨体育学院 | Sports nutrient component quantifying device based on physical training of athletes and use method thereof |
| CN115165054B (en) * | 2022-06-30 | 2023-05-30 | 哈尔滨体育学院 | Sport nutrition component quantifying device based on physical training of athlete and using method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |