CN203298856U - Electronic scale - Google Patents
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- CN203298856U CN203298856U CN2013202990261U CN201320299026U CN203298856U CN 203298856 U CN203298856 U CN 203298856U CN 2013202990261 U CN2013202990261 U CN 2013202990261U CN 201320299026 U CN201320299026 U CN 201320299026U CN 203298856 U CN203298856 U CN 203298856U
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Abstract
The utility model discloses an electronic scale comprising a gravity sensor, a controller and a calibration mechanism. The gravity sensor is used for acquiring data generated in the deformation process of a weighed object, and two cushion blocks are respectively arranged above and below the gravity sensor; the controller is used for processing the data acquired by the gravity sensor; the calibration mechanism includes a calibration switch and a calibration unit, and the calibration unit includes a zero tracker and an extreme value removing average filter. By changing the calibration structure in the prior art, setting a series of parameters of the electronic scale according to the characteristics of the gravity sensor and adopting a zero tracking algorithm and an extreme value removing filter algorithm in the calibration process, the weight of a weighed object can be acquired more accurately. As the calibration switch is an intermittent switch, the electronic scale automatically enters a weighing state after calibration without the need of manual shifting, the electronic scale is simple and convenient to use, and calibration time is saved.
Description
Technical field
The utility model relates to the demarcation field of electronic weighing appliance, relates in particular to a kind of electronic scales.
Background technology
Electronic scales is as weighing-appliance; its accurately importance have some idea of; and to the demarcation of equipment, can only be to carry out under the supervision of national quality testing department; therefore need to carry out a kind of protection to the demarcation of equipment; this kind protection should guarantee that national quality testing department can carry out proving operation easily; will be also a kind of hidden to the user, be also a kind of caution to client.The demarcation mechanism of electronic scales need to be carried out under the supervision of national quality testing department, so the user can not at will demarcate.Calibration switch being carried out junction with the up and down shell carry out lead sealing, is a kind of protection to demarcating like this, is a kind of protection of rights and interests to the consumer, is also a kind of protection to product itself.
In order to realize the protection that electronic scales is demarcated; need to carry out lead sealing to the calibration switch of electronic scales; need to carry out timing signal and by national quality supervision department, lead sealing be opened, electronic scales is demarcated, comprise scale division value, maximum overload value, maximum range and actual loading code are set.
But carry out timing signal in prior art, need artificial manual unlocking calibration switch, make electronic scales enter into the demarcation state, after demarcation is completed, more artificially manually calibration switch is pushed the state of weighing, electronic scales enters into the state of weighing,, with the lead sealing of calibration switch position, give the user and use again.The state of weighing can't be automatically entered into after demarcation is completed, the demarcation efficiency to electronic scales can't be improved.
After having demarcated, electronic scales, due to the change of environment, may also can cause certain error, causes electronic scales also to need again to demarcate.
The utility model content
The technical matters that (one) will solve
For above-mentioned defect, the technical problems to be solved in the utility model is the demarcation that how can realize fast electronic scales, saves the nominal time, improves electronic scales interference to external world.
(2) technical scheme
For addressing the above problem, the utility model provides a kind of electronic scales, specifically comprises:
Gravity sensor, controller and calibrating device;
Described gravity sensor is used for obtaining the data that the weighing object produces due to the generation deformation process, and in the above and below of described gravity sensor, two cushion blocks is set respectively;
Described controller is processed the data that described gravity sensor obtains;
Described calibrating device comprises calibration switch and demarcation unit, and described demarcation unit comprises the Zero-tracking device and removes the extreme mean wave filter.
Further, described gravity sensor arranges the position of described cushion block respectively in upper left side and lower right, perhaps in lower left and upper right side.
Further, described calibration switch is the batch (-type) switch, and after demarcation is completed, described electronic scales enters into the state of weighing automatically.
Further, the Zero-tracking device, to following the tracks of the zero point of described electronic scales, carries out automatic clear in the scope that arranges.
Further, the described extreme mean wave filter that goes is eliminated obvious impulse disturbances.
Further, described demarcation unit also comprises that the data that described gravity sensor is obtained carry out the processing of gravity conversion, obtains the gravity conversion value, and the recycling penalty coefficient compensates operation to described gravity conversion value, the gravity conversion value after being compensated.
(3) beneficial effect
The utility model proposes a kind of electronic scales, by changing calibration structure of the prior art, in the above and below of gravity sensor, two characteristics according to gravity sensor are set respectively and electronic scales are carried out the setting of series of parameters, adopt the Zero-tracking algorithm in calibration process and remove the extreme value filtering algorithm, thereby gather more accurately the weight that is weighed object, because calibration switch adopts the batch (-type) switch, after demarcation is completed, electronic scales enters into the state of weighing automatically, need not artificially manually to stir, simple and convenient, save the nominal time.Further, after having demarcated, if environment change equipment while again being placed balance, while the zero-error that allows occurring, can carry out the Zero-tracking scheduling algorithm by the zero clearing button and process, calibrate the standard state that reaches demarcation, reduce the number of times of demarcating, improve more exactly electronic scales antijamming capability to external world, have very strong adaptivity.
Description of drawings
Fig. 1 is the composition schematic diagram of a kind of electronic scales of the utility model;
Fig. 2 is two kinds of set-up mode schematic diagram of cushion block in utility model;
Fig. 3 is the structural representation of objective table in the utility model;
Fig. 4 is the position relationship schematic diagram of gravity sensor and cushion block in the utility model;
Fig. 5 is based on electronic scales overall construction drawing of the present utility model.
Wherein respectively number representative structure as follows:
10, gravity sensor, 100, cushion block, 101, aluminum alloy bottom plate, 11, pallet, 12, scale pan cross bottom tray support, 20, controller, 30, calibrating device, 31, calibration switch, 32, demarcate unit, 321, the Zero-tracking device, 322, remove the extreme mean wave filter, 40, the motherboard circuit processing unit, 21, printer, 22, 220V turns 12V/24V Power supply unit, 24, the LED double-display screen, 25, key-press module, 26, processor circuit board, 29, the card tablet, 50, shell, 60, chassis, 70, the plug wire box, 80, lower margin, 90, power interface, 99, switch.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
A kind of electronic scales is provided in the utility model embodiment, has formed schematic diagram as shown in Figure 1, specifically comprised: gravity sensor 10, controller 20 and calibrating device 30.
, except gravity sensor 10, also comprise the processor circuit board for various functional modules in the structure of electronic scales, gravity sensor 10 be with the weight of superjacent object pass to the motherboard circuit processing unit 40 of electronic scales in the mode of pressure deformation.wherein the deformation of gravity sensor 10 is that the signal of simulating passes to motherboard circuit processing unit 40, and motherboard circuit processing unit 40 is to process with the form of digital quantity, therefore motherboard circuit processing unit 40 need to have analog-and digital-between the Key Circuit design of conversion, in order better simulating signal to be delivered to digital processing element, also need to increase at place, processing of circuit unit signal amplification circuit, the simulating signal of the conversion of the pressure on gravity sensor is amplified, then be converted to corresponding digital signal, the last digital signal that will obtain again sends to the controller 20 in motherboard circuit processing unit 40 to process.
The top of gravity sensor 10 also has objective table, comprise pallet 11 and scale pan cross bottom tray support 12, as shown in Figure 3, pallet 11 wherein is used for placing the article of weighing, and pallet 11 is middle low, rectangular shape that surrounding is slightly high, can guarantee that the article that easily roll can landing when putting into pallet 11 and carry out weighing under.Scale pan cross bottom tray support 12 adopts the material of aluminium alloy, is used for support tray 11, the weight that guarantees to bear 30KG.At four foots pad that arrange of pallet 11 surroundings, be used for the friction between scale pan cross bottom tray support 12 and pallet 11, make the combination between pallet and cross collet closer.the following of scale pan cross bottom tray support 12 is the aluminium alloy plate of small rectangle, by four screws, that scale pan cross bottom tray support 12 is fixing with the aluminum alloy bottom plate 101 that is rectangle, aluminum alloy bottom plate 101 is connected and fixed by cushion block 100 and an end of gravity sensor 10, the other end of gravity sensor 10 is fixed on the aluminium alloy plate of projection by cushion block 100 use screws equally, the aluminium alloy plate of projection is fixed on the aluminium alloy floor of whole equipment with four screws, structural relation as shown in Figure 4, what provide in figure is upper left side and the lower right that cushion block is arranged on gravity sensor, be not limited to the set-up mode in figure, can also adopt other mode to arrange according to actual conditions, effect is exactly to improve the precision of electronic scales weighing object.
The function of controller 20 is exactly that the data that gravity sensor 10 obtains are processed.Mainboard of electronic scale processing of circuit unit 40 is exactly the core circuit of controller 20, in addition, motherboard circuit processing unit 40 also comprises that printer 21,220V turn 12V/24V Power supply unit 22, communication module 23, LED double-display screen 24, key-press module 25 and processor circuit board 26.Wherein gravity sensor 10 is fixed on aluminum alloy bottom plate, support rectangular aluminium alloy plate by cushion block 100, four screw holes are arranged on aluminium alloy plate, be used for the cross bottom tray support 12 under the scale pan is fixed on the rectangle aluminium alloy plate, aluminium alloy plate and cushion block 100 are fixed together by the slotted hole screw with that end that gravity sensor 10 bears gravity.Gravity sensor 10 is converted to simulating signal with the gravity of object on pallet and passes to the core circuit plate and process.Fact proved and adopt this kind mode to carry out the connection of sensor, integral device is all accurate with middle value at four angles of weighing measurement, can make the signal of sensor more reliable and more stable.The front side of gravity sensor 10 is placed processor circuit board 26 and is fixed on aluminum alloy bottom plate, and rear side is placed 220V and turned 12V/24V Power supply unit 22, and is fixed on the base plate of aluminium alloy.Printer 21 is placed on the right side of gravity sensor 10, be fixed on aluminum alloy bottom plate by slide rail, the form of the required information of user with label shown, comprise Chinese character, numeral, one dimension code and Quick Response Code etc., and on the information that will print uploads onto the server by communication module 23 in real time.The left side of gravity sensor 10 is equipped with communication module 23, comprise three serial port module and a network interface module, and communication module 23 is fixed on aluminum alloy bottom plate, the network interface module adopts Wifi switching circuit board (card extender that can substitute for other carries out the replacement of other modules), be positioned at the top of printing base plate, near power switch.Communication module is not limited to the Wifi mode, can also be radio frequency (RF) communication module, perhaps Zigbee module, and perhaps the module of these several communication modes all has, and certainly also will comprise the module of changing between the Transistor-Transistor Logic level with these modules.Also be provided with card tablet 29 near communication module 23, be mainly used in the identification of identity,, in the situation that the user needs, can carry out matching operation by the information that the card tablet read the RFID radio-frequency card, if identity validation success enter required duty.LED double-display screen 24 and key-press module 25 are fixedly mounted on the electronic scales shell, are screwed four copper posts on aluminum alloy bottom plate, are used for connecting electronic scale shell, thereby make whole equipment have good closure.LED double-display screen 24 lays respectively at the place ahead and the rear of printed board, facilitates user and client two sides checking data.Key-press module 25 comprises 75 buttons, and 30 function keys are wherein arranged.The controller 20 of electronic scales is positioned at the top of aluminium sheet drain pan, the below of key-press module 25.The upper lower casing of electronic scales, by the support and connection of four copper posts, was both played a supporting role, and played again connection function.
Need to prove, the structure of the controller in the present embodiment is just in order to illustrate the various piece in controller, certainly the several main module except relating in the present embodiment, the structure that also has other electronic scaless such as interface, device power supply (DPS) switch of 220V AC power to possess on the bottom aluminium alloy plate.
Calibrating device 30 comprises calibration switch 31 and demarcation unit 32, and calibration switch 31 is the batch (-type) switch, and after demarcation is completed, electronic scales enters into the state of weighing automatically.Calibration switch 31 is protection mechanisms that electronic scales is demarcated, and is arranged on the bottom of electronic scales, utilizes the form of lead sealing, can play and connect and fixing effect.
When having object to be placed on pallet, gravity sensor under pallet receives the load that on pallet, object brings, by the elastic body stress deformation, it is the also distortion simultaneously of resistance strain gage that sticks on elastic body, cause the variation of resistance strain gage resistance, by metering circuit, weight signal is converted to corresponding analog electrical signal and exports to signal processing apparatus, the signal processing circuit in signal processing apparatus and AD analog-digital conversion control circuit and gravity sensor are made one.Comprise simulating signal is carried out amplifier section at the AD analog to digital conversion circuit, what the AD analog to digital conversion partly adopted is 24 high-precision conversion chips, amplification and the high-precision AD modulus conversion chip of utilization to simulating signal, can improve the accuracy of collection of simulant signal.Simulating signal is converted to binary data through the AD analog to digital conversion circuit and processes to data processor, and what data processor used in the present embodiment is that LPC1766 processes.LPC1766 is the high speed cortex kernel of ARM kernel, and internal memory is large, and the code quantity that can deposit is many, therefore can deposit easily for the program of demarcating.Also comprise on the core circuit plate: JTAG(Joint Test Action Group, combined testing action group) download peripheral circuit module, Bootload program download module etc.
Electronic scales enters calibrating procedure, certain condition setting need to be arranged, native system is taked is the low level significance bit of differentiating an IO mouth in LPC1766, therefore on the circuit board of core processor when P0_22 is set to low level program enter the demarcation state, carry out the demarcation of electronic scales.Because calibration switch 31 adopts the discontinuous button and digitally is connected, when button was pressed, P0_22 was set to low level, and system default is high level when disconnecting, and by the high electronegative potential that judges P0_22, carries out the demarcation of electronic scales., in order to go all out with higher precision on precision, increased Zero-tracking and removed extreme mean filtering scheduling algorithm in Software for Design, thereby can collect more accurately the actual weight of object.
Demarcate unit 32 and comprise Zero-tracking device 321 and remove extreme mean wave filter 322, follow the tracks of of the zero point of 321 pairs of electronic scaless of Zero-tracking device, carries out automatic clear in the scope that arranges, and goes extreme mean wave filter 322 to eliminate obvious impulse disturbances.
Go the extreme mean filtering technique arithmetic mean filter method and middle position value filtering method relatively in produce, it is a kind of compound digital filtering method, the advantage that digital filtering algorithm overcomes stochastic error can be embodied, the problem of pin-point accuracy, high reliability and the high stability of digital filter can also be overcome simultaneously.
Go the algorithm principle of extreme mean filter method to be:, to signal continuous sampling N time (as N, getting 10),, with its cumulative summation, to find out simultaneously maximal value Y
maxAnd Y
min, then from cumulative and deduct Y
maxAnd Y
min, to average by N-2 (8) sampled value, the efficiently sampling value is:
Maximal value in the sampled value that collects and minimum value all are defined as obvious interference value, by " the extreme value filtration " that arranges, it are filtered out, make its calculating of not participating in mean value, namely picked out insecure value, make the actual displayed value more accurately and reliably.For random noise, its essence is done up and down fluctuation exactly near a certain scope around mean value, the calculating of averaging of N-2 sampled value after " extreme value filtration " exactly of the effective value of sampling, and such wave filter has good smoothness and sensitivity.Aspect the software processing, go the extreme mean filter method to adopt the mode of processing while gathering, therefore need to not take the working area of N data in storage area, therefore save taking storage space in calculating process, its implementation procedure is the change by sampling number N, observe smoothness and the sensitivity of actual filtering, finally determine the size of N.
Demarcate unit 32 and also comprise that the data that gravity sensor 100 is obtained carry out the processing of gravity conversion, obtain the gravity conversion value, the recycling penalty coefficient compensates operation to the gravity conversion value, the gravity conversion value after being compensated.Wherein penalty coefficient is chosen based on experience value, makes the weight of object that calculates according to the gravity conversion value after compensation more near actual weight.
To carry out successively the setting of scale division value, the value of establishing of maximum range, the setting of overload quantity and the setting of actual loading counterweight in calibration process.The identification that can realize smallest object weight that arranges according to scale division value.Above-mentioned is that the weight of the counterweight that bears according to gravity sensor is converted to corresponding slope value K and the setting of constant radix to demarcating relevant value, and the value that will demarcate is stored on core processor, in direct ratio according to the binary data of the weight of object and A/D conversion, utilize this relation can calculate according to the binary data that the weight of different objects is changed out the actual weight of this object.The computing formula of K is: loaded value that K=(loading is equal to the value of the AD value of counterweight-unloaded AD) * scale division value * 10/ button arranges is stored in main board memory with the K value after calculating the K value.After completing, demarcation enters into the state of weighing, the object that is placed on electronic scales is that 24 position digital signals pass to core processor with analog signal conversion, core processor reads the data of pressure conversion and processes from 24, comprising gravity conversion value and offset, will utilize on K value and electronic scales the AD conversion value of the weight of placing object, and filtering and go extreme mean to obtain the weight of actual object.On LED charactron before and after the weight of object that will weigh again is presented at.
The Zero-tracking algorithm also has a benefit to be exactly: after having demarcated, if environment change equipment while again being placed balance, while the zero-error that allows occurring, can carry out the Zero-tracking scheduling algorithm by the zero clearing button processes, calibrate the standard state that reaches demarcation, reduce the number of times of demarcating, improve more exactly electronic scales antijamming capability to external world, have very strong adaptivity.
The electronic scales general structure that Fig. 5 obtains for the improvement based on above-mentioned demarcation mechanism, except comprising above-mentioned structure, also comprise: chassis 60, be used for mainboard, Switching Power Supply, printer, gravity sensor module limit fixed thereon, shell is connected with chassis, makes it to become airtight integral body.Plug wire box 70, be used for the network interface on mainboard is connected out with serial ports, can conveniently be used for carrying out the use of network and the use of serial ports.Realize the selection of the several functions of this scale, as GPS and and host computer between exchange etc.Lower margin 80, whole equipment comprise four lower margins, are used for regulating the balance of whole equipment and bear the pressure of top-down integral body.Shell 50, be used for modules and circuit board all are wrapped in its inside, prevents that moisture or other materials from entering.Inside at shell 50 also is provided with external power source interface 90, Power supply is provided for mainboard and printer by external power source interface 90,, because the module of electronic scales inside and the needed voltage of circuit board work are all 12V or 24V, therefore need 220V to turn 12V/24V Power supply unit 22 and carry out voltage transitions.Finally, be provided with switch 99 in the inside of shell 50.
The electronic scales of the electronic scales that the present embodiment provides, by changing calibration structure of the prior art, in the above and below of gravity sensor, two characteristics according to gravity sensor are set respectively and electronic scales are carried out the setting of series of parameters, adopt the Zero-tracking algorithm in calibration process and remove the extreme value filtering algorithm, thereby gather more accurately the weight that is weighed object, because calibration switch adopts the batch (-type) switch, after demarcation is completed, electronic scales enters into the state of weighing automatically, need not artificially manually to stir, simple and convenient, save the nominal time.
Above embodiment only is used for explanation the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that do not break away from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (5)
1. an electronic scales, is characterized in that, comprising: gravity sensor, controller and calibrating device;
Described gravity sensor is used for obtaining the data that the weighing object produces due to the generation deformation process, and in the above and below of described gravity sensor, two cushion blocks is set respectively;
Described controller is processed the data that described gravity sensor obtains;
Described calibrating device comprises calibration switch and demarcation unit, and described demarcation unit comprises the Zero-tracking device and removes the extreme mean wave filter.
2. electronic scales as claimed in claim 1, is characterized in that, described gravity sensor arranges the position of described cushion block respectively in upper left side and lower right, perhaps in lower left and upper right side.
3. electronic scales as claimed in claim 1, is characterized in that, described calibration switch is the batch (-type) switch, and after demarcation is completed, described electronic scales enters into the state of weighing automatically.
4. electronic scales as claimed in claim 1, is characterized in that, described Zero-tracking device, to following the tracks of the zero point of described electronic scales, carries out automatic clear in the scope that arranges.
5. electronic scales as claimed in claim 1, is characterized in that, the described extreme mean wave filter that goes is eliminated obvious impulse disturbances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202990261U CN203298856U (en) | 2013-05-28 | 2013-05-28 | Electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202990261U CN203298856U (en) | 2013-05-28 | 2013-05-28 | Electronic scale |
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| CN203298856U true CN203298856U (en) | 2013-11-20 |
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| CN2013202990261U Expired - Fee Related CN203298856U (en) | 2013-05-28 | 2013-05-28 | Electronic scale |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292888A (en) * | 2013-05-28 | 2013-09-11 | 北京农业信息技术研究中心 | Calibration protecting mechanism of electronic scale |
| CN107870026A (en) * | 2017-09-04 | 2018-04-03 | 东莞技研新阳电子有限公司 | Elongated material metage system |
| CN108922084A (en) * | 2018-07-06 | 2018-11-30 | Ut斯达康通讯有限公司 | A kind of commodity recognition method and device |
| CN109063325A (en) * | 2018-07-30 | 2018-12-21 | 白杨 | A kind of item quantity calculation method based on weighing |
| CN111307264A (en) * | 2019-12-30 | 2020-06-19 | 中山佳维电子有限公司 | Scale body testing method and device, storage medium and upper computer |
| CN112130934A (en) * | 2020-09-11 | 2020-12-25 | 深圳市双佳医疗科技有限公司 | Balance following algorithm for weighing zero point |
-
2013
- 2013-05-28 CN CN2013202990261U patent/CN203298856U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292888A (en) * | 2013-05-28 | 2013-09-11 | 北京农业信息技术研究中心 | Calibration protecting mechanism of electronic scale |
| CN103292888B (en) * | 2013-05-28 | 2015-08-12 | 北京农业信息技术研究中心 | A kind of demarcation protection mechanism of electronic scales |
| CN107870026A (en) * | 2017-09-04 | 2018-04-03 | 东莞技研新阳电子有限公司 | Elongated material metage system |
| CN108922084A (en) * | 2018-07-06 | 2018-11-30 | Ut斯达康通讯有限公司 | A kind of commodity recognition method and device |
| CN109063325A (en) * | 2018-07-30 | 2018-12-21 | 白杨 | A kind of item quantity calculation method based on weighing |
| WO2020024873A1 (en) * | 2018-07-30 | 2020-02-06 | 白杨 | Weighing-based goods quantity calculation method |
| CN109063325B (en) * | 2018-07-30 | 2024-02-23 | 白杨 | Goods quantity calculating method based on weighing |
| US11953369B2 (en) | 2018-07-30 | 2024-04-09 | Yang Bai | Quantity measurement method based on weighing |
| CN111307264A (en) * | 2019-12-30 | 2020-06-19 | 中山佳维电子有限公司 | Scale body testing method and device, storage medium and upper computer |
| CN111307264B (en) * | 2019-12-30 | 2021-09-21 | 中山佳维电子有限公司 | Scale body testing method and device, storage medium and upper computer |
| CN112130934A (en) * | 2020-09-11 | 2020-12-25 | 深圳市双佳医疗科技有限公司 | Balance following algorithm for weighing zero point |
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