CN203551059U - Analog sensor with digital compensation function - Google Patents
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- CN203551059U CN203551059U CN201320685865.7U CN201320685865U CN203551059U CN 203551059 U CN203551059 U CN 203551059U CN 201320685865 U CN201320685865 U CN 201320685865U CN 203551059 U CN203551059 U CN 203551059U
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Abstract
The utility model relates to an analog sensor with a digital compensation function. The analog sensor comprises an elastic body which deforms according to pressure sensed by the analog sensor; a strain sheet which is connected with the elastic body and generates change of resistance according to deformation; a strain sheet bridge circuit which is connected with the strain sheet and transmits the change of resistance so that a first analog signal is outputted; an analog-to-digital conversion module which is connected with the output end of the strain sheet bridge circuit of the analog sensor and receives the first analog signal from the strain sheet bridge circuit and converts the first analog signal into a first digital signal, wherein the first analog signal is the analog signal indicting weight; and an analog output port which outputs a second analog signal. The analog sensor also comprises a signal processing and output circuit which is connected between the output end of the analog-to-digital conversion module and the analog output port so that the first digital signal is compensated and converted into the second analog signal.
Description
Technical field
The utility model relates to LOAD CELLS field, relates in particular to the simulation LOAD CELLS with digital compensation function.
Background technology
Strain chip simulation LOAD CELLS is a kind of comparatively conventional simulation LOAD CELLS.Because nearly all instrument is all supported analog sensor, therefore strain chip simulation LOAD CELLS possess interface simple, can directly apply to the advantages such as dynamic weighing occasion.But traditional strain chip analog sensor adopts the mode of serial or parallel connection resistance on strain gage bridge road to compensate zero point, sensitivity and temperature coefficient, can only realize once linear compensation, and compensation precision is poor.And the method for analog compensation, cannot solve creep and the errors relevant to time and heap(ed) capacity such as hysteresis.
Be directed to this, LOAD CELLS of the prior art receives the simulating signal from the strain gage bridge road of sensor, by this analog signal figure, the weight signal collecting and temperature signal (if having) are calculated to obtain the weight data through compensation by a series of model simultaneously, finally this weight data through compensation such as, is outputed to instrument or other peripheral hardwares by special digital port (RS232/485, CANOPEN etc.).
But the shortcoming of this LOAD CELLS is, owing to need to adopting special digital port to export the weight data through compensation, makes the interface of simulating LOAD CELLS become complicated, and has limited the general connectivity of instrument or other peripheral hardwares.
Summary of the invention
The utility model is for solving the above-mentioned problems in the prior art, proposed a kind ofly can to realize high-accuracy compensation, can make to simulate LOAD CELLS interface again and keep the simply simulation LOAD CELLS with digital compensation function.
According to the utility model on the one hand, provide a kind of analog sensor, having comprised: an elastic body, there is deformation in the pressure that described elastic body senses according to described analog sensor; One foil gauge, described foil gauge is connected to described elastic body and according to the variation of described deformation value of having a resistance; One strain gage bridge road, described strain gage bridge road is connected to described foil gauge, transmits the variation of described resistance value to export the first simulating signal; One analog-to-digital conversion module, be connected to the output terminal on the strain gage bridge road of analog sensor, receive the first simulating signal from described strain gage bridge road, and convert described the first simulating signal to first digital signal, wherein, described the first simulating signal is the simulating signal that represents weight; One analog output mouth, export the second simulating signal, wherein, described analog sensor also comprises signal processing and an output circuit, be connected between the output terminal and described analog output mouth of described analog-to-digital conversion module, described the first digital signal is compensated and convert thereof into described the second simulating signal.
According to the another aspect of the utility model, described signal is processed and output circuit comprises: a compensating module, be connected to the output terminal of described analog-to-digital conversion module, and described the first digital signal is compensated to obtain the first digital signal through compensation; And a D/A converter module, be connected to the output terminal of described compensating module, receive described the first digital signal through compensation and convert thereof into described the second simulating signal.
According to the another aspect of the utility model, described signal is processed and output circuit comprises: a compensating module, be connected to the output terminal of described analog-to-digital conversion module, described the first digital signal compensated to obtain representing to the second digital signal of simulating signal amount to be compensated; One D/A converter module, is connected to the output terminal of described compensating module, receives described the second digital signal and converts thereof into the 3rd simulating signal; And an operational amplification circuit, be connected to the output terminal on strain gage bridge road and the output terminal of described D/A converter module of analog sensor, receive described the first simulating signal and described the 3rd simulating signal and generate described the second simulating signal with stack.
According to the another aspect of the utility model, described signal is processed and output circuit comprises: a compensating module, be connected to the output terminal of described analog-to-digital conversion module, and described the first digital signal is compensated to obtain simulating signal amount to be compensated; One pulse width modulation module, is connected to the output terminal of described compensating module, simulating signal amount to be compensated is carried out to width modulation to obtain the 4th simulating signal with square wave; And an adding circuit, be connected to the output terminal on strain gage bridge road and the output terminal of described pulse width modulation module of analog sensor, receive described the first simulating signal and described the 4th simulating signal and generate described the second simulating signal with stack.
According to the another aspect of the utility model, described analog sensor also comprises a temperature sensor, the output terminal of described temperature sensor is connected to an input end of described analog-to-digital conversion module, the simulating signal of described temperature sensor acquisition tables temp. displaying function and export the input end of described analog-to-digital conversion module to, wherein, the simulating signal of described expression temperature is converted into described the first digital signal together with described the first simulating signal.
According to the another aspect of the utility model, described analog sensor also comprises a diagnostic module, described diagnostic module is connected between an output terminal of described analog-to-digital conversion module and an input end of the processing of described signal and output circuit, analyzes described the first simulating signal and processes and output circuit to obtain the diagnostic state data of the duty that represents described analog sensor and described diagnostic state data are sent to described signal.
According to the another aspect of the utility model, described analog sensor also comprises: a temperature sensor, the output terminal of described temperature sensor is connected to an input end of described analog-to-digital conversion module, the simulating signal of described temperature sensor acquisition tables temp. displaying function and export the input end of described analog-to-digital conversion module to, the simulating signal of described expression temperature is converted into described the first digital signal together with described the first simulating signal; An and diagnostic module, described diagnostic module is connected between an output terminal of described analog-to-digital conversion module and an input end of the processing of described signal and output circuit, analyzes described the first simulating signal and processes and output circuit to obtain the diagnostic state data of the duty that represents described analog sensor and described diagnostic state data are sent to described signal.
According to the another aspect of the utility model, described analog sensor also comprises a digital output port, described signal is processed and output circuit also comprises a transport module, described transport module is connected between the output terminal and described digital output port of described diagnostic module, for transmitting described diagnostic state data.
According to the another aspect of the utility model, described analog sensor also comprises a digital output port, described signal is processed and output circuit also comprises a transport module, described transport module is connected between the output terminal and described digital output port of described diagnostic module, for transmitting described diagnostic state data.
The utility model not only can be introduced temperature compensation, creep and lag compensation in simulation LOAD CELLS, realizes high-precision simulation weighing-up wave output.Can make again to simulate the advantage that interface keeps simple, general, dynamic following performance is good of LOAD CELLS simultaneously.In addition, the microprocessor in simulation LOAD CELLS of the present utility model can also carry out diagnostic analysis to working sensor state, and by data-out port and peripheral hardware communication, provides additional digital function.
Should be appreciated that more than the utility model generality description and the following detailed description are all exemplary and explanat, and be intended to provide further explanation for the utility model as claimed in claim.
Accompanying drawing explanation
Comprise that accompanying drawing is for providing, the utility model further to be understood, they are included and form the application's a part, and accompanying drawing shows embodiment of the present utility model, and with together with this instructions, play the effect of explaining the utility model principle.In accompanying drawing:
Fig. 1 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Fig. 2 is according to the signal processing of the analog sensor of the utility model one embodiment and the schematic diagram of output circuit.
Fig. 3 is according to the signal processing of the analog sensor of the another embodiment of the utility model and the schematic diagram of output circuit.
Fig. 4 is according to the signal processing of the analog sensor of the another embodiment of the utility model and the schematic diagram of output circuit.
Fig. 5 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Fig. 6 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Fig. 7 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Fig. 8 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Fig. 9 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.
Embodiment
With detailed reference to accompanying drawing, embodiment of the present utility model is described now.
Fig. 1 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.As shown in Figure 1, analog sensor 100 comprises: an elastic body 102, and there is deformation in the pressure that described elastic body senses according to described analog sensor; One foil gauge 104, described foil gauge is connected to described elastic body and according to the variation of described deformation value of having a resistance; One strain gage bridge road 106, described strain gage bridge road is connected to described foil gauge, transmits the variation of described resistance value to export the first simulating signal; One analog-to-digital conversion module 108, be connected to the output terminal on the strain gage bridge road of analog sensor, receive the first simulating signal from described strain gage bridge road, and convert described the first simulating signal to first digital signal, wherein, described the first simulating signal is the simulating signal that represents weight; One analog output mouth 116, output the second simulating signal.Described analog sensor also comprises signal processing and an output circuit 110, is connected between the output terminal and described analog output mouth 116 of described analog-to-digital conversion module 108, and described the first digital signal is compensated and convert thereof into described the second simulating signal.
Analog sensor 100 shown in Fig. 1 also comprises digital output port 118, and signal is processed and the output of output circuit 110 is also exported by digital output port 118.In one embodiment, digital output port 118 can be according to user's needs, output digital weighing information.
Fig. 2 is according to the signal processing of the analog sensor of the utility model one embodiment and the schematic diagram of output circuit.Signal is processed and output circuit 110 comprises: a compensating module 212, is connected to described analog-to-digital conversion module 108(and sees Fig. 1) output terminal, described the first digital signal is compensated to obtain the first digital signal through compensation; And a D/A converter module 214, be connected to the output terminal of described compensating module 212, receive described the first digital signal through compensation and convert thereof into described the second simulating signal.The second simulating signal is further shown in Fig. 1 by analog output mouth 116() output.
Fig. 3 is according to the signal processing of the analog sensor of the another embodiment of the utility model and the schematic diagram of output circuit.Signal is processed and output circuit 110 comprises: a compensating module 312, be connected to the output terminal of described analog-to-digital conversion module 108, and described the first digital signal is compensated to obtain representing to the second digital signal of simulating signal amount to be compensated; One D/A converter module 314, is connected to the output terminal of described compensating module 312, receives described the second digital signal and converts thereof into the 3rd simulating signal; An and operational amplification circuit 316, be connected to the output terminal on strain gage bridge road 106 and the output terminal of described D/A converter module 314 of analog sensor, receive described the first simulating signal and described the 3rd simulating signal and generate described the second simulating signal with stack.The second simulating signal is further shown in Fig. 1 by analog output mouth 116() output.
Fig. 4 is according to the signal processing of the analog sensor of the another embodiment of the utility model and the schematic diagram of output circuit.Signal is processed and output circuit 110 comprises: a compensating module 412, be connected to the output terminal of described analog-to-digital conversion module 108, and described the first digital signal is compensated to obtain simulating signal amount to be compensated; One pulse width modulation module 414, is connected to the output terminal of described compensating module 412, simulating signal amount to be compensated is carried out to width modulation to obtain the 4th simulating signal with square wave; And an adding circuit 416, be connected to the output terminal on strain gage bridge road 106 and the output terminal of described pulse width modulation module 414 of analog sensor, receive described the first simulating signal and described the 4th simulating signal and generate described the second simulating signal with stack.The second simulating signal is further shown in Fig. 1 by analog output mouth 116() output.
Fig. 5 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.Analog sensor 500 shown in Fig. 5 is only with the difference of the analog sensor 100 shown in Fig. 1, analog sensor 500 also comprises a temperature sensor 502, the output terminal of described temperature sensor 502 is connected to an input end of described analog-to-digital conversion module 508, the simulating signal of described temperature sensor 502 acquisition tables temp. displaying functions and export the input end of described analog-to-digital conversion module 508 to, wherein, the simulating signal of described expression temperature converts described the first digital signal to by analog-to-digital conversion module 508 together with described the first simulating signal.Signal shown in Fig. 5 process and output circuit 510 also can as the signal of Fig. 2-4 process and each embodiment of output circuit 110 shown in have various implementation.The miscellaneous part of Fig. 5 and function are all corresponding with Fig. 1 and similar, do not repeat them here.
Fig. 6 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.Analog sensor 600 shown in Fig. 6 is with the difference of the analog sensor 100 shown in Fig. 1, analog sensor 600 also comprises a diagnostic module 604, described diagnostic module 604 is connected between an output terminal of described analog-to-digital conversion module 108 and an input end of the processing of described signal and output circuit 610, analyzes described the first simulating signal and processes and output circuit 610 to obtain the diagnostic state data of the duty that represents described analog sensor and described diagnostic state data are sent to described signal.Analog sensor 600 shown in Fig. 6 is also with the difference of the analog sensor 100 shown in Fig. 1, signal is processed and output circuit 610 comprises: a compensating module 612, be connected to the output terminal of described analog-to-digital conversion module 108, described the first digital signal is compensated to obtain the first digital signal through compensation; One D/A converter module 614, is connected to the output terminal of described compensating module 612, receives described the first digital signal through compensation and converts thereof into described the second simulating signal; And a transport module 616, be connected between the output terminal and digital output port 118 of described diagnostic module 604, for transmitting described diagnostic state data.The miscellaneous part of Fig. 6 and function are all corresponding with Fig. 1 and similar, do not repeat them here.
Fig. 7 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.Analog sensor 600 shown in Fig. 7 is with the difference of the analog sensor 600 shown in Fig. 6, analog sensor 600 also comprises a temperature sensor 702, the output terminal of described temperature sensor 702 is connected to an input end of described analog-to-digital conversion module 708, the simulating signal of described temperature sensor 702 acquisition tables temp. displaying functions and export the input end of described analog-to-digital conversion module 708 to, wherein, the simulating signal of described expression temperature converts described the first digital signal to by analog-to-digital conversion module 708 together with described the first simulating signal.The miscellaneous part of Fig. 7 and function are all corresponding with Fig. 6 and similar, do not repeat them here.
Fig. 8 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.Analog sensor shown in Fig. 8 800 is with the difference of the analog sensor 700 shown in Fig. 7, and the signal shown in Fig. 8 is processed and output circuit 810 is different from the signal shown in Fig. 7 and processes and output circuit 710.Particularly, signal is processed and output circuit 810 comprises: a compensating module 812, be connected to the output terminal of described analog-to-digital conversion module 808, and described the first digital signal is compensated to obtain representing to the second digital signal of simulating signal amount to be compensated; One D/A converter module 814, is connected to the output terminal of described compensating module 812, receives described the second digital signal and converts thereof into the 3rd simulating signal; One operational amplification circuit 816, is connected to the output terminal on strain gage bridge road 106 and the output terminal of described D/A converter module 814 of analog sensor, receives described the first simulating signal and described the 3rd simulating signal and generates described the second simulating signal with stack; And a transport module 816, be connected between the output terminal and digital output port 118 of described diagnostic module 804, for transmitting described diagnostic state data.The miscellaneous part of Fig. 8 and function are all corresponding with Fig. 7 and similar, do not repeat them here.
Fig. 9 is according to the schematic diagram of the analog sensor of an embodiment of the present utility model.Analog sensor shown in Fig. 9 900 is with the difference of the analog sensor 700 shown in Fig. 7, and the signal shown in Fig. 9 is processed and output circuit 910 is different from the signal shown in Fig. 7 and processes and output circuit 710.Particularly, signal is processed and output circuit 910 comprises: a compensating module 912, be connected to the output terminal of described analog-to-digital conversion module 908, and described the first digital signal is compensated to obtain simulating signal amount to be compensated; One pulse width modulation module 914, is connected to the output terminal of described compensating module 912, simulating signal amount to be compensated is carried out to width modulation to obtain the 4th simulating signal with square wave; One adding circuit 916, is connected to the output terminal on strain gage bridge road 106 and the output terminal of described pulse width modulation module 914 of analog sensor, receives described the first simulating signal and described the 4th simulating signal and generates described the second simulating signal with stack; And a transport module 916, be connected between the output terminal and digital output port 118 of described diagnostic module 904, for transmitting described diagnostic state data.The miscellaneous part of Fig. 9 and function are all corresponding with Fig. 7 and similar, do not repeat them here.
Those skilled in the art can be obvious, can carry out various modifications and variations and not depart from spirit and scope of the present utility model above-mentioned exemplary embodiment of the present utility model.Therefore, be intended to make the utility model to cover to drop within the scope of appended claims and equivalence techniques scheme thereof to modification of the present utility model and modification.
Claims (9)
1. an analog sensor, comprising:
One elastic body (102), there is deformation in the pressure that described elastic body senses according to described analog sensor;
One foil gauge (104), described foil gauge is connected to described elastic body and according to the variation of described deformation value of having a resistance;
One strain gage bridge road (106), described strain gage bridge road is connected to described foil gauge, transmits the variation of described resistance value to export the first simulating signal;
One analog-to-digital conversion module (108), be connected to the output terminal on the strain gage bridge road of analog sensor, reception is from first simulating signal on described strain gage bridge road, and convert described the first simulating signal to first digital signal, wherein, described the first simulating signal is the simulating signal that represents weight;
One analog output mouth (116), output the second simulating signal,
It is characterized in that,
Described analog sensor also comprises signal processing and an output circuit (110), be connected between the output terminal and described analog output mouth (116) of described analog-to-digital conversion module (108), described the first digital signal is compensated and convert thereof into described the second simulating signal.
2. analog sensor as claimed in claim 1, is characterized in that, described signal is processed and output circuit (110) comprising:
One compensating module (212), is connected to the output terminal of described analog-to-digital conversion module (108), and described the first digital signal is compensated to obtain the first digital signal through compensation; And
One D/A converter module (214), is connected to the output terminal of described compensating module (212), receives described the first digital signal through compensation and converts thereof into described the second simulating signal.
3. analog sensor as claimed in claim 1, is characterized in that, described signal is processed and output circuit (110) comprising:
One compensating module (312), is connected to the output terminal of described analog-to-digital conversion module (108), described the first digital signal is compensated to obtain representing to the second digital signal of simulating signal amount to be compensated;
One D/A converter module (314), is connected to the output terminal of described compensating module (312), receives described the second digital signal and converts thereof into the 3rd simulating signal; And
One operational amplification circuit (316), be connected to the output terminal on strain gage bridge road (106) and the output terminal of described D/A converter module (314) of analog sensor, receive described the first simulating signal and described the 3rd simulating signal and generate described the second simulating signal with stack.
4. analog sensor as claimed in claim 1, is characterized in that, described signal is processed and output circuit (110) comprising:
One compensating module (412), is connected to the output terminal of described analog-to-digital conversion module (108), and described the first digital signal is compensated to obtain simulating signal amount to be compensated;
One pulse width modulation module (414), is connected to the output terminal of described compensating module (412), simulating signal amount to be compensated is carried out to width modulation to obtain the 4th simulating signal with square wave; And
One adding circuit (416), be connected to the output terminal on strain gage bridge road (106) and the output terminal of described pulse width modulation module (414) of analog sensor, receive described the first simulating signal and described the 4th simulating signal and generate described the second simulating signal with stack.
5. the analog sensor as described in any one of claim 1-4, it is characterized in that, described analog sensor also comprises a temperature sensor (502), the output terminal of described temperature sensor (502) is connected to an input end of described analog-to-digital conversion module (508), the simulating signal of described temperature sensor (502) acquisition tables temp. displaying function and export the input end of described analog-to-digital conversion module (508) to
Wherein, the simulating signal of described expression temperature is converted into described the first digital signal together with described the first simulating signal.
6. the analog sensor as described in any one of claim 1-4, it is characterized in that, described analog sensor also comprises a diagnostic module (604), described diagnostic module (604) is connected between an output terminal of described analog-to-digital conversion module (108) and an input end of the processing of described signal and output circuit (610), analyzes described the first simulating signal and processes and output circuit (610) to obtain the diagnostic state data of the duty that represents described analog sensor and described diagnostic state data are sent to described signal.
7. the analog sensor as described in any one of claim 1-4, is characterized in that, described analog sensor also comprises:
One temperature sensor (702), the output terminal of described temperature sensor (702) is connected to an input end of described analog-to-digital conversion module (708), the simulating signal of described temperature sensor (702) acquisition tables temp. displaying function and export the input end of described analog-to-digital conversion module (708) to, the simulating signal of described expression temperature is converted into described the first digital signal together with described the first simulating signal; And
One diagnostic module (704), described diagnostic module (704) is connected between an output terminal of described analog-to-digital conversion module (708) and an input end of the processing of described signal and output circuit (710), analyzes described the first simulating signal and processes and output circuit (710) to obtain the diagnostic state data of the duty that represents described analog sensor and described diagnostic state data are sent to described signal.
8. analog sensor as claimed in claim 6, it is characterized in that, described analog sensor also comprises a digital output port (118), described signal is processed and output circuit (610) also comprises a transport module (616), described transport module (616) is connected between the output terminal and described digital output port (118) of described diagnostic module (604), for transmitting described diagnostic state data.
9. analog sensor as claimed in claim 7, it is characterized in that, described analog sensor also comprises a digital output port (118), described signal is processed and output circuit (710,810,910) also comprises a transport module (716,816,916), described transport module (716,816,916) is connected between the output terminal and described digital output port (118) of described diagnostic module (704,804,904), for transmitting described diagnostic state data.
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CN201320685865.7U CN203551059U (en) | 2013-11-01 | 2013-11-01 | Analog sensor with digital compensation function |
EP14858032.7A EP3063514B1 (en) | 2013-11-01 | 2014-10-31 | Analog sensor with digital compensation function |
PCT/CN2014/089984 WO2015062535A1 (en) | 2013-11-01 | 2014-10-31 | Analog sensor with digital compensation function |
US15/134,087 US10215617B2 (en) | 2013-11-01 | 2016-04-20 | Analog sensor with digital compensation function |
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CN201320685865.7U CN203551059U (en) | 2013-11-01 | 2013-11-01 | Analog sensor with digital compensation function |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104374453A (en) * | 2014-12-03 | 2015-02-25 | 烟台钧杰衡器有限公司 | Multichannel digitized intelligent unbalance loading error correcting and weighing sensor and weighing method thereof |
CN104406670A (en) * | 2014-11-27 | 2015-03-11 | 北京万集科技股份有限公司 | Dynamic weighing method and dynamic weighing system based on charge and discharge of capacitor |
WO2015062535A1 (en) * | 2013-11-01 | 2015-05-07 | Mettler Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
CN104614055A (en) * | 2013-11-01 | 2015-05-13 | 梅特勒-托利多(常州)精密仪器有限公司 | Analog sensor with digital compensation function |
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2013
- 2013-11-01 CN CN201320685865.7U patent/CN203551059U/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015062535A1 (en) * | 2013-11-01 | 2015-05-07 | Mettler Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
CN104614055A (en) * | 2013-11-01 | 2015-05-13 | 梅特勒-托利多(常州)精密仪器有限公司 | Analog sensor with digital compensation function |
CN104614055B (en) * | 2013-11-01 | 2017-11-10 | 梅特勒-托利多(常州)精密仪器有限公司 | Simulation weighing 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 |
CN104406670A (en) * | 2014-11-27 | 2015-03-11 | 北京万集科技股份有限公司 | Dynamic weighing method and dynamic weighing system based on charge and discharge of capacitor |
CN104406670B (en) * | 2014-11-27 | 2017-01-25 | 北京万集科技股份有限公司 | Dynamic weighing method and dynamic weighing system based on charge and discharge of capacitor |
CN104374453A (en) * | 2014-12-03 | 2015-02-25 | 烟台钧杰衡器有限公司 | Multichannel digitized intelligent unbalance loading error correcting and weighing sensor and weighing method thereof |
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Granted publication date: 20140416 |