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Balance the classification and structure of electronic balance

   From the structure of the balance principle of classification, the balance is divided into lever balance (mechanical balance), and two major categories of electronic balance. Lever balance and can be divided into double disk scales such as arm and double single disk scales ranging arm, double disk scales can also be divided into swing and damping balance scales and electro-optic scales. Below to double single disk scales ranging arm, double disk photoelectric scales and electronic balance, for example, introduced the principle and structure of analytical balance. (xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
1 the structure of the double disk photoelectric scales
Double disk photoelectric balance is designed according to the lever principle. Its structure: by the frame parts, column section and beam section, suspension system, braking system, optical readout system, mechanical overweight device of seven parts.
(1) the casing outside the part. Outside the box to protect the balance, not affected by dust, heat, steam, steam flow, etc. The influence of external conditions.
(2) the casing outside the part. Outside the box to protect the balance, not affected by dust, heat, steam, steam flow, etc. The influence of external conditions.
(3) the frame part. Outside the box to protect the balance, not affected by dust, heat, steam, steam flow, etc. The influence of external conditions.
(4) column section. Pillar is a hollow cylinder, vertical fixed to the floor, balance the rise and fall of brake rod through the stud hollow hole, drive size under the wing movement. Post top central fixed protection socket. Balance the level of general use level bubble, install behind dry column.
(5) beam section. , lili, knife box beam section by beams, balance the snake, sense of thallium and pointer. Beam is an important part of a balance, the beam is equipped with three agate knife,
For the fulcrum between knife, knife edge down,
The structure of the double disk photoelectric balance three blade installation must be parallel,
1 - beam; 2 - balance thallium; 3 - pillar; 4 - pointer; 5 - hanging son; 6 - damper cylinder; On both sides of bearing knife, knife edge up.
7 - damper cylinder; 8 - scale; 9 - upping the index plate; 10 - overweight rod; 11 - the center of the ring is perpendicular to the blade wires, and
Mg weights; 12 - projection screen; 13 - zero pole; 14 - stop start button; 15 - tray; In a horizontal plane. For the blade
Turn the index plate control; 16 - level adjust a foot; 17 - lack of transformer, in a straight line, without sharp crack. To maintain the balance of sensitivity and stability, and pay special attention to protect the balance of the blade from the shock and reduce the wear and tear. Feeling of thallium with dry adjust the sensitivity of the scale, balance the thallium used when no load to adjust the balance of equilibrium position (i.e., zero).
(6) suspension system. The suspension system
Consists of lifting lugs, dampers, and scale.
(7) the braking system.
The role of the brake system is to protect the balance of the blade, keep it and avoid sharp crash impact due lack of phenomenon. day
Flat on both sides of the load is not balanced, we don't fully open balance, otherwise the balance beam tilt is too big, lug falls off easily, damaged knives.
(8) optical readout system.
Optical readout system is the optical amplification was carried out on the differential gauge.
(9) mechanical overweight system.
Some mechanical overweight device balance, above 1 g weight with forceps access; Weight of 1 g of the following make it ring, 10 mg
Within the value read from the screen.. (xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
2 the structure of the single plate photoelectric scales
Single plate photoelectric balance refers to the single disk scales ranging arm, also called double single disk scales, with all mechanical underweight and optical reading devices. It than double disk scales superior performance, has the sense of constant error and weighing, all arm speed, etc.
Single plate photoelectric balance weights and known objects in the same suspension system, weighing and is called the object, minus the weight on the suspension system, has made beam keeps the load balance, which is placed on the scale of known objects instead of suspension system
Series of Jordan farmar, keep the beam balance position, the quality is equal to minus the weight is according to the quality of content. The structure of the double disk photoelectric scales can be divided into the frame parts, lifting parts, beams, suspension system, optical readout system, the mechanical device underweight six parts. DT a type 100 single plate balance structure as shown in figure 2-2.
(1) the casing outside the part. The casing outside part of the installation of power transformers, power switch, stop moving axis, underweight device, zero and micro reading devices. Balance to cover up the air, dust, keep the balance temperature stability.
(2) lifting parts. Lifting role is part of the support beam and suspension system, realize the balance of the switch.
(3) beam section. Beam by hard aluminum alloy
Gold, protection and bearing knife by artificial white
Precious stones, cross beam tail is scale. weight
Figure 2-2 DT a type 100 single plate balance structure diagram Tuo main beam balance role. Balance tuo with
1 - cross beam; 2 - fulcrum knife; 3 - bearing knife; 4 - damping piece; Thallium is 5 - balance; To adjust the zero point of balance, sense of thallium is adjusted
6 - damping cylinder; 7 - differential scale; 8 - lug; 9 - weight; 10 - Jordan farmar's; Sensitivity.
11 - scale; 12 - projection screen; 13 to the power switch; 14 - stop start button;
15 to underweight hand knob
(4) suspension system. Suspension system is composed of bearing plate, Jordan farmar, scale. Weights of grooves can be placed in the 16 cylindrical farmar, combined into 99. 9 g within the scope of any quality.
(5) optical readout system. Is the differential gauge amplifier to reading.
(6) mechanical underweight device. By underweight hand knob control the geometry of the three groups of different CAM, make underweight rod ups and downs, lift weights to realize underweight operation, at the same time show the reading window minus the weight quality.. (xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
3 the construction of electronic balance
3.1 the structure of the electronic balance principle
Application of modern electronic control technology for weighing scales known as electronic balance. All kinds of electronic balance control method and circuit of the hook is not the same, but its basis is the electromagnetic force balance principle of weighing. When the wire in a magnetic field. The wires to produce electromagnetic force, the direction of the force can use left hand rule to determine, when the magnetic field intensity is constant, the size of the force is proportional to the intensity of current through the coil. Down if the weight of gravity direction, the direction of the electromagnetic force, and the balance, then through a wire of electric current is proportional to the mass are called objects.
Now with the MD series case electronic balance, electronic scales, weighing principle, its structure diagram see 2-3. Scale by bracket connecting rod connected to the coil, the coil in the magnetic field. Scale and is called the gravity of the object through the connecting rod bracket, acting on the coil direction downward; Coil with an electric current passes through, producing a downward effect of electromagnetic force, contrary to scale the gravity direction, equal size.
Displacement sensor in the center of the book, when objects on the scale of quality change, displacement sensor displacement signal detection by the controller and amplifier to change the coil current until the coil back to the center position, through digital shows the mass of the body.
Figure 2-3 MD series electronic balance structure diagram in figure 2-4 electronic balance shapes and parts
1 - scale; 2 - reed; 3 - magnet; 4 - the magnetic loop body; 1-5 - line coil scale; 2 - tray; 3 - wind ring; 4 - dust separator
Frame; 6 - displacement sensor; 7 - amplifier; 8 - current control chart
3.2 the characteristics of electronic balance
(1) electronic balance bearing point using elastic reeds, there is no mechanical balance of gems or agate knife, cancelled the lifting device, adopting digital display mode instead of a pointer dial. Long service life, stable performance, high sensitivity, easy to operate.
(2) on the principle of electromagnetic force balance, electronic balance, weighing full range no leverage. Put on is called content after, namely the balance in a few seconds, and the display reading, weighing speed, high precision.
(3) some electronic balance, weighing range and accuracy of reading variable function, such as Switzerland mettler AE240 balance, in the range of 0 ~ 205 g weighing, reading accuracy as 0. LMG; Within the scope of the 0 ~ 41 g weigh, reading accuracy 0.01 mg.
(4) analysis and semi-micro electronic balance is generally have internal correction function. Balance internal equipped with standard weight, using a calibration function, standard weight is enabled, the balance of the microprocessor will value the quality of the standard weight as a standard calibration, in order to obtain the correct weighing data.
Electronic balance is highly intelligent, but in the whole range within the scope of implementation to tare, accumulate, display, fault alarm overload, etc.
(xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
Electronic balance by the amount of sense (index) values are divided into: ultramicro electronic balance, half microbalance, constant electronic balance, analytical balance, precision electronic balance.
(xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
Ø ultramicro electronic balance: ultramicro is the biggest weighing scales 2 to 5 g, its scale degree value is less than (maximum) weighing 10-6.
Ø microbalance: microbalance weighing in commonly 3 to 50 g, its index value is less than (maximum) weighing 10-5.
Ø microbalance: half microbalance weighing 20 to 100 g in general, the degree value is less than (maximum) weighing 10-5.
The biggest weighing Ø constants: electronic balance, the balance is in commonly 100 to 200 g, its degree value is less than (maximum) weighing 10-5.
Ø analytical balance: in fact, electronic analytical balance, is a constant balance, half microbalance, microbalance and ultramicro the floorboard of the balance.
Ø precision electronic balance: this kind of level of accuracy of electronic balance is being Ⅱ level of electronic balance
So how should the use of electronic balance, the following will simply to introduce you to:
Ø balance should be kept in the shelter in the first place. Stable and no vibration table.
Ø adjustment levels: adjustment two level adjusting screw, will be the middle of the bubble modulation, balance is completely level.
Ø, turning On the power supply balance self-checking (screen) appeared "OFF", the introspection over, click [On] key, balance operational.
Ø calibration adjustment: put the calibration weights, balance automatically.
Ø weighing: let scale no-load click On [On], balance of self-check, the flat back to zero, the balance will be ready to weigh. Put the empty container on the balance into a plate, peel (click on 】 【 O/T, give the container filled with weighing samples, show the net weight. Then click on 】 【 O/T, balance to turn it off.
(xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
Electronic balance according to the sensor is mainly divided into the following categories:
1, electromagnetic balance type electronic balance, is made by using the principle of the electromagnetic force equilibrium and electronic balance. The principle of balance. Its structure but confused precision is high. Can reach more than one over two million of the precision, it is the present domestic high precision scales widely adopted on a situation.
2, inductive electronic balance, is made by the principle of differential transformer and balance. Its structural simplicity, accuracy and the fund is low, it is now widely used in precision request is not high a balance in the industry.
3, the resistance strain type electronic balance, which is made by the principle of resistance strain type balance, the precision can reach one over ten thousand, weighing scale is larger, from a few kilograms to dozens of tons, suitable for large weighing equipment, such as truck scale, electronic belt scale, etc.
4, capacitance type electronic balance, which is made by using the principle of the capacitive balance. Its simple structure, low precision, use in the industry of individual request.
(xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales)
Electronic balance classification according to the use, from what we see in the market, the supermarket of general use daily to the key laboratory of using electronic balance have door is various, such as analytical balance, precision balance, industrial scales, scales, jewellery scales, industrial, medical, animal balance scales scales and so on. So electronic balance sensor used in classification according to the structure can be divided into three categories, strain type, ceramic,. Low strain type electronic balance range small precision. Ceramics, with large range precision is low. Application of electronic magnetic principle has the characteristic such as high performance and stable precision, but the range is not high.
(xian research instrument equipment co., LTD. Xi 'an electronic balance, xi 'an, analytical balance in xinjiang, urumqi, precision, jewelry scales in xinjiang, xinjiang medical scales).

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