CN2601395Y - Digitized weighting module - Google Patents
Digitized weighting module Download PDFInfo
- Publication number
- CN2601395Y CN2601395Y CN 03220381 CN03220381U CN2601395Y CN 2601395 Y CN2601395 Y CN 2601395Y CN 03220381 CN03220381 CN 03220381 CN 03220381 U CN03220381 U CN 03220381U CN 2601395 Y CN2601395 Y CN 2601395Y
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- China
- Prior art keywords
- circuit
- analog
- load cells
- signal
- digital conversion
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- Expired - Lifetime
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- 238000005303 weighing Methods 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims description 20
- 238000012937 correction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000015654 memory Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The utility model relates to a digital weighing module, which comprises a weighing sensor and a bracket, the weighing sensor is fixed on the bracket, the utility model also comprises a signal processing circuit, an analog-digital conversion control circuit, a micro treatment circuit and a memory circuit, the circuit boards of all the circuits are fixed on the bracket and a integral structure is formed with the weighing sensor; the analog signal output by the weighing sensor is connected with the input end of the signal processing circuit, the output of the signal processing circuit is connected with the input end of the analog-digital conversion control circuit, the memory circuit is used for correcting and calibrating the parameters of the weighing signals, the analog-digital conversion control circuit and memory circuit are separately connected with the micro treatment circuit, the serial port of the micro treatment circuit output the digital signals. The utility model has the advantages of convenient installation and maintenance, best exchangeability and replacing the weighing sensor without correcting the parameter of the whole weighing equipment.
Description
Technical field
The utility model relates to a kind of Weighing module, especially relates to a kind of digitizing Weighing module.
Background technology
Present disclosed weighing-appliance mainly comprises LOAD CELLS and signal processing apparatus.LOAD CELLS is fixedly connected on the carriage, usually LOAD CELLS is connected with signal processing apparatus by cable, perhaps signal processing circuit in the signal processing apparatus and analog-digital conversion control circuit and LOAD CELLS are made one, again by being connected with storage circuit with micro-processor interface circuit by signal cable.Because of LOAD CELLS and signal processing apparatus are provided with respectively, so in use, there is following problem: though first LOAD CELLS is mounted on the carriage, but in more by the LOAD CELLS model, and sensor is contained on the carriage that matches separately, in case replacing LOAD CELLS, because LOAD CELLS and carriage mismatch, will make LOAD CELLS installation site on carriage improper, and the influence performance of weighing, because of LOAD CELLS and carriage do not have transsexually, also cause the difficulty of LOAD CELLS manufacturing and maintenance.The second, because the storage circuit of preservation calibration parameter is what to be separated with LOAD CELLS, therefore be to change the LOAD CELLS part, or the signal processing circuit in the replacing signal processing apparatus, just must proofread and correct the calibration parameter in the storage circuit again, safeguard, use inconvenient.Though the 3rd identical signal processing apparatus can be applied to different weighing-appliances, but all must match with different weighing-appliance working procedures, interface to weighing-appliance also redefines possibly simultaneously, and this has also increased the time of development workload and exploitation greatly.Four, be rely on to paste the influence that the nickel platinized platinum reduces sensor temperature and creep on the elastic body of present most LOAD CELLS, so LOAD CELLS can't realize digital compensation, compensation precision is low, cost is high.
Summary of the invention
It is convenient that technical problem to be solved in the utility model provides a kind of installation, maintenance, changes LOAD CELLS and need not the correction parameter of whole weighing-appliance is reset the digitizing Weighing module that interchangeability is good.
Further technical matters to be solved in the utility model provides a kind of working temperature of energy perception LOAD CELLS, to sensor temperature and the high digitizing Weighing module of creep compensation precision.
Further technical matters to be solved in the utility model provides a kind of digitizing Weighing module with standard serial IO interface.
The utility model is that the technical scheme that addresses the above problem is: a kind of digitizing Weighing module, comprise LOAD CELLS and carriage, LOAD CELLS is fixed on the carriage, it is characterized in that: also have the analog to digital conversion circuit, micro-processor interface circuit and the storage circuit that constitute by signal processing circuit, analog-digital conversion control circuit, the wiring board of foregoing circuit is fixed on the carriage, and constitutes one-piece construction with LOAD CELLS; The simulating signal of LOAD CELLS output connects the signal processing circuit input end, the output of signal processing circuit connects the input end of analog-digital conversion control circuit, storage circuit has the calibration parameter that weight signal is converted to the actual weight value, analog-digital conversion control circuit and storage circuit connect micro-processor interface circuit respectively, the serial ports output digital signal of micro-processor interface circuit.
The utility model for the technical scheme that solves above-mentioned further technical matters is: adhesion has thermistor on the described LOAD CELLS, the output signal of thermistor connects analog-digital conversion control circuit by the temperature amplification treatment circuit, and also has the parameter of temperature and creep correction on the storage circuit.
The utility model for the technical scheme that solves above-mentioned further technical matters is: the serial ports of micro-processor interface circuit is RS232.
The utility model realizes that the advantage of technique scheme is: first, because whole Weighing module is with LOAD CELLS, signal processing circuit, analog-digital conversion control circuit, micro-processor interface circuit and the storage circuit that weight signal is converted to the calibration parameter of actual weight value connected into one-piece construction, Weighing module can directly be exported digital signal, therefore when weighing-appliance is keeped in repair, the integral replacing Weighing module, both can guarantee the degree of accuracy of weighing, and need not again whole weighing-appliance to be recalibrated, has interchangeability preferably, greatly facilitate the manufacturing and the maintenance of LOAD CELLS, can reduce the production cost and the production cycle of LOAD CELLS.The second, because LOAD CELLS is connected with carriage, be integral installation or replacing, avoided LOAD CELLS to install improper and, also be convenient to manufacturing and maintenance the influence that weighing precision causes.Three, digital weighing module of the present utility model is directly exported digital signal by serial ports, can connect with different weighing system interfaces, and can carry out work under the control of this system.Four, on LOAD CELLS, pasted thermistor, the parameter that has weighing and sensing actuator temperature and creep correction simultaneously in the storage circuit, pass through temperature value, realization is low-cost carries out digital compensation to the temperature performance and the croop property of LOAD CELLS, has improved the compensation precision of LOAD CELLS greatly.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
See the digitizing Weighing module shown in Fig. 1～2, the analog to digital converter, micro-processor interface circuit 10 and the storage circuit 11 that comprise LOAD CELLS 5, constitute by signal processing circuit 8 and analog-digital conversion control circuit 9.LOAD CELLS 5 constitutes by being used for that power is converted to the electric signal resistance bridge on the elastic body of esthesis and the elastic body that is stuck; LOAD CELLS 5 is fixed on the carriage 3; prevent in the work destruction that the stretching of overload and transportation causes, the limiting and protecting device 7 that is made of adjustable limiting screw and sidepiece adjustable limiting piece also is housed on carriage 3.Wiring board 1 with foregoing circuit be fixed on the carriage 3 and with 5 one-tenth one-piece constructions of LOAD CELLS.See Fig. 1, wiring board 1 is fixed on the support 2, and support 2 is fixedlyed connected with carriage 3 again, and support 1 is again the support of a shaped as frame, simultaneously as metallic shield, in case electromagnetic interference (EMI).
See Fig. 2, the output signal of LOAD CELLS 5 connects analog-digital conversion control circuit 9 after signal processing circuit 8, signal processing circuit 8 and analog-digital conversion control circuit 9 constitute analog to digital conversion circuit, analog-digital conversion control circuit 9 adopts the MELS12 chip, signal processing circuit 8 of the present utility model comprises analog switch K1, by U8, R1, integrating amplification circuit that C1 constitutes and the comparator circuit that constitutes by U6-A and peripheral circuit thereof, analog-digital conversion control circuit 9 provides the analog to digital conversion control signal on the one hand, SPI interface by standard is connected with micro-processor interface circuit 10 on the other hand, under the SWIW switching signal control of analog-digital conversion control circuit 9 output to the weight signal integration, the signal of U8 output is by analog switch K2, C2, the constant current source that R2 forms dashes, the periodic linear sawtooth wave that charge-discharge circuit produced compares, analog switch K2 is by the RAR signal controlling of analog-digital conversion control circuit 9 outputs, control the rolling counters forward of analog-digital conversion control circuit 9 inside by the output of U6-A, and count value is directly proportional with the weight signal of input, has finished the conversion to weight signal.
For realizing high precision, low cost the temperature performance and the croop property of LOAD CELLS are carried out digital compensation, adhesion has thermistor 4 on the LOAD CELLS 5, be used for the working temperature of detecting sensor, the output of thermistor 4 temperature signals, and connect analog-digital conversion control circuit 9 by Temperature Treatment circuit 12, the parameter that also has temperature and creep correction simultaneously on the storage circuit 11, by temperature value, realization is low-cost carries out digital compensation to the temperature performance and the croop property of LOAD CELLS.This processes temperature signal circuit 12 comprises analog switching circuit K3, the integration discharge road that constitutes by U10, C3, R3, R4, R5 and form comparator circuit by U6-B and peripheral circuit thereof, SWIT switching signal by analog-digital conversion control circuit 9 outputs is carried out integration to temperature signal, the negative input that different with signal processing circuit 8 is at comparer U6-B, signal is provided by the constant dividing potential drop that R6, R8, C4 voltage divider produce, analog-digital conversion control circuit 9 is being controlled in the output of same U6-B, has finished the conversion to temperature value signal.
When the weight simulating signal of LOAD CELLS and temperature analog signal after analog to digital conversion, under the control of micro-processor interface circuit 10, these two signals are all become digital signal to be delivered in the micro-processor interface circuit 10, pass through digital filtering again, stable digitized weight data and temperature data have just been obtained, utilize temperature data and corrected parameter, the temperature performance and the croop property of 10 pairs of LOAD CELLS of micro-processor interface circuit are revised, and utilize calibration parameter and revised weight data to carry out computing and handle just having obtained actual gravimetric value, realize high-precision digital compensation.
Claims (6)
1, a kind of digitizing Weighing module, comprise LOAD CELLS (5) and carriage (3), LOAD CELLS (5) is fixed on the carriage (3), it is characterized in that: also have the analog to digital conversion circuit, micro-processor interface circuit (10) and the storage circuit (11) that constitute by signal processing circuit (8), analog-digital conversion control circuit (9), the wiring board of foregoing circuit (1) is fixed on the carriage (3), and constitutes one-piece construction with LOAD CELLS (5); The simulating signal of LOAD CELLS (5) output connects signal processing circuit (8) input end, the output of signal processing circuit (8) connects the input end of analog-digital conversion control circuit (9), storage circuit (10) has the calibration parameter that weight signal is converted to the actual weight value, analog-digital conversion control circuit (9) and storage circuit (11) connect micro-processor interface circuit (10) respectively, the serial ports output digital signal of micro-processor interface circuit (10).
2, digitizing Weighing module according to claim 1, it is characterized in that: described LOAD CELLS (5) is upward gone back adhesion thermistor (4), the signal of thermistor (4) output connects analog-digital conversion control circuit (9) by processes temperature signal circuit (12), and also has the parameter of temperature and creep correction on the storage circuit (11).
3, digitizing Weighing module according to claim 1 is characterized in that: the serial ports of described micro-processor interface circuit (10) is RS232.
4, digitizing Weighing module according to claim 1 is characterized in that: described signal processing circuit (8) is made of integrating amplification circuit and comparator circuit.
5, digitizing Weighing module according to claim 1 is characterized in that: described carriage (3) is provided with limiting and protecting device (7), and on wiring board (1) fixed support (2), support (2) is fixedlyed connected with carriage (3).
6, digitizing Weighing module according to claim 5 is characterized in that: described support (2) is a frame support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220381 CN2601395Y (en) | 2003-03-11 | 2003-03-11 | Digitized weighting module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03220381 CN2601395Y (en) | 2003-03-11 | 2003-03-11 | Digitized weighting module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2601395Y true CN2601395Y (en) | 2004-01-28 |
Family
ID=34161865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03220381 Expired - Lifetime CN2601395Y (en) | 2003-03-11 | 2003-03-11 | Digitized weighting module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2601395Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607497A (en) * | 2012-03-19 | 2012-07-25 | 柳州市智博科技有限公司 | Method and system for detecting raw silk quality during production of reeling silks |
| CN102636245A (en) * | 2012-04-23 | 2012-08-15 | 中联重科股份有限公司 | Weighing measurement method, device and system for materials |
| WO2015062535A1 (en) * | 2013-11-01 | 2015-05-07 | Mettler Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
| CN107389161A (en) * | 2017-08-11 | 2017-11-24 | 苏州妙文信息科技有限公司 | A kind of intelligent digital weighing sensor |
| CN109961554A (en) * | 2017-12-22 | 2019-07-02 | Ci技术传感器公司 | The method of system and the camera for replacing this system with processing unit and the camera being attached to |
-
2003
- 2003-03-11 CN CN 03220381 patent/CN2601395Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607497A (en) * | 2012-03-19 | 2012-07-25 | 柳州市智博科技有限公司 | Method and system for detecting raw silk quality during production of reeling silks |
| CN102607497B (en) * | 2012-03-19 | 2015-09-16 | 柳州市智博科技有限公司 | Raw silk quality detection method and system in filature production |
| CN102636245A (en) * | 2012-04-23 | 2012-08-15 | 中联重科股份有限公司 | Weighing measurement method, device and system for materials |
| CN102636245B (en) * | 2012-04-23 | 2013-11-06 | 中联重科股份有限公司 | Weighing measurement method, device and system for materials |
| WO2015062535A1 (en) * | 2013-11-01 | 2015-05-07 | Mettler Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
| US10215617B2 (en) | 2013-11-01 | 2019-02-26 | Metter Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
| CN107389161A (en) * | 2017-08-11 | 2017-11-24 | 苏州妙文信息科技有限公司 | A kind of intelligent digital weighing sensor |
| CN109961554A (en) * | 2017-12-22 | 2019-07-02 | Ci技术传感器公司 | The method of system and the camera for replacing this system with processing unit and the camera being attached to |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130311 Granted publication date: 20040128 |