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CN104614055B - Simulation weighing sensor with digital compensation function - Google Patents

Simulation weighing sensor with digital compensation function Download PDF

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Publication number
CN104614055B
CN104614055B CN201310538774.5A CN201310538774A CN104614055B CN 104614055 B CN104614055 B CN 104614055B CN 201310538774 A CN201310538774 A CN 201310538774A CN 104614055 B CN104614055 B CN 104614055B
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China
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analog signal
signal
simulation
weighing sensor
analog
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CN104614055A (en
Inventor
戴�峰
雷伯·丹尼尔
埃默里·吉恩-克里斯多夫
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Mettler Toledo Changzhou Measurement Technology Ltd
Mettler Toledo Changzhou Precision Instruments Ltd
Mettler Toledo Changzhou Weighing Equipment Co Ltd
Original Assignee
Mettler Toledo Changzhou Measurement Technology Ltd
Mettler Toledo Changzhou Precision Instruments Ltd
Mettler Toledo Changzhou Weighing Equipment Co Ltd
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Application filed by Mettler Toledo Changzhou Measurement Technology Ltd, Mettler Toledo Changzhou Precision Instruments Ltd, Mettler Toledo Changzhou Weighing Equipment Co Ltd filed Critical Mettler Toledo Changzhou Measurement Technology Ltd
Priority to CN201310538774.5A priority Critical patent/CN104614055B/en
Priority to PCT/CN2014/089984 priority patent/WO2015062535A1/en
Priority to EP14858032.7A priority patent/EP3063514B1/en
Publication of CN104614055A publication Critical patent/CN104614055A/en
Priority to US15/134,087 priority patent/US10215617B2/en
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Publication of CN104614055B publication Critical patent/CN104614055B/en
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Abstract

The present invention relates to the simulation weighing sensor with digital compensation function.Simulation weighing sensor includes:Elastomer, deformed upon according to the pressure that simulation weighing sensor senses;Foil gauge, it is connected to elastomer and the change of resistance value is produced according to deformation;Foil gauge bridge, is connected to foil gauge, transmits the change of resistance value to export the first analog signal;Analog-to-digital conversion module, the output end of the foil gauge bridge of simulation weighing sensor is connected to, the first analog signal from foil gauge bridge is received and the first analog signal is converted into the first data signal, wherein, the first analog signal is to represent the analog signal of weight;Simulation output port, export the second analog signal.Simulation weighing sensor also includes signal transacting and output circuit, is connected between the output end of analog-to-digital conversion module and simulation output port, the first data signal is compensated and converts thereof into the second analog signal.The present invention can realize high-accuracy compensation, and and can makes simulation weighing sensor interface keep simple.

Description

Simulation weighing sensor with digital compensation function
Technical field
The present invention relates to weighing sensor field, more particularly to the simulation weighing sensor with digital compensation function.
Background technology
Strain chip simulation weighing sensor is a kind of more conventional simulation weighing sensor.Due to almost all of instrument Table all supports to simulate weighing sensor, therefore strains chip simulation weighing sensor and possess that interface is simple, may be directly applied to move State weigh occasion the advantages that.But traditional strain chip simulation weighing sensor uses the serial or parallel connection electricity in foil gauge bridge The mode of resistance compensates zero point, sensitivity and temperature coefficient, can only realize that once linear compensates, compensation precision is poor.Moreover, mould The method that quasi-complement is repaid, can not solve the error related to time and loading capacity such as creep and hysteresis.
This is directed to, weighing sensor of the prior art receives the analog signal of the foil gauge bridge from sensor, Carried out by the analog signal digital, while by the weight signal collected and temperature signal (if having) by a series of model Calculate to obtain compensated weight data, finally by the compensated weight data by special digital port (such as RS232/485, CANOPEN etc.) it is output to instrument or other peripheral hardwares.
It is compensated due to needing to export using special digital port however, the shortcomings that this weighing sensor is Weight data so that simulating the interface of weighing sensor becomes complicated, and limits instrument or the general of other peripheral hardwares connects Connecing property.
The content of the invention
The present invention is solves the above-mentioned problems in the prior art, it is proposed that one kind can realize high-accuracy compensation, again Simulation weighing sensor interface can be made to keep simply carrying the simulation weighing sensor of digital compensation function.
According to an aspect of the present invention, there is provided one kind simulation weighing sensor, including:One elastomer, the elastomer root Deformed upon according to the pressure that the simulation weighing sensor senses;One foil gauge, the foil gauge are connected to the elasticity Body and the change of resistance value is produced according to the deformation;One foil gauge bridge, the foil gauge bridge are connected to described answer Become piece, transmit the change of the resistance value to export the first analog signal;One analog-to-digital conversion module, it is connected to simulation weighing and sensing The output end of the foil gauge bridge of device, receives the first analog signal from the foil gauge bridge, and by first mould Intend signal and be converted into the first data signal, wherein, first analog signal is to represent the analog signal of weight;One simulation output Port, the second analog signal is exported, wherein, the simulation weighing sensor also includes a signal transacting and output circuit, connects Between the output end of the analog-to-digital conversion module and the simulation output port, first data signal is compensated simultaneously Convert thereof into second analog signal.
According to another aspect of the invention, the signal transacting and output circuit include:One compensating module, it is connected to the mould The output end of number modular converter, is compensated to first data signal to obtain the first compensated data signal;And One D/A converter module, is connected to the output end of the compensating module, receive the first compensated data signal and by its It is converted into second analog signal.
According to another aspect of the invention, the signal transacting and output circuit include:One compensating module, it is connected to the mould The output end of number modular converters, first data signal is compensated to obtain representing the of compensated analog signal amount Two digital signal;One D/A converter module, is connected to the output end of the compensating module, and reception second data signal simultaneously will It is converted into the 3rd analog signal;And an operational amplification circuit, be connected to simulation weighing sensor foil gauge bridge it is defeated Go out the output end of end and the D/A converter module, receive first analog signal and the 3rd analog signal with folded Add generation second analog signal.
According to another aspect of the invention, the signal transacting and output circuit include:One compensating module, it is connected to the mould The output end of number modular converter, is compensated to first data signal to obtain compensated analog signal amount;One pulsewidth Modulation module, be connected to the output end of the compensating module, compensated analog signal amount is carried out with square wave pulsewidth modulation with Obtain the 4th analog signal;And an add circuit, be connected to the foil gauge bridge of simulation weighing sensor output end and The output end of the pulse width modulation module, first analog signal and the 4th analog signal are received to be superimposed generation institute State the second analog signal.
According to another aspect of the invention, the simulation weighing sensor also includes a temperature sensor, the TEMP The output end of device is connected to an input of the analog-to-digital conversion module, the simulation letter of the temperature sensor acquisition tables temperature displaying function Number and export to the analog-to-digital conversion module input, wherein, it is described represent temperature analog signal and first mould Intend signal and be converted into first data signal together.
According to another aspect of the invention, the simulation weighing sensor also includes a diagnostic module, and the diagnostic module connects It is connected between an output end of the analog-to-digital conversion module and the signal transacting and an input of output circuit, described in analysis First analog signal is to obtain representing the diagnostic state data of the working condition of the simulation weighing sensor and by the diagnosis Status data is sent to the signal transacting and output circuit.
According to another aspect of the invention, the simulation weighing sensor also includes:One temperature sensor, the TEMP The output end of device is connected to an input of the analog-to-digital conversion module, the simulation letter of the temperature sensor acquisition tables temperature displaying function Number and export to the analog-to-digital conversion module input, it is described represent temperature analog signal and first analog signal First data signal is converted into together;And a diagnostic module, the diagnostic module are connected to the analog-to-digital conversion mould Between one input of one output end of block and the signal transacting and output circuit, first analog signal is analyzed to obtain Represent the diagnostic state data of the working condition of the simulation weighing sensor and be sent to the diagnostic state data described Signal transacting and output circuit.
According to another aspect of the invention, the simulation weighing sensor also includes a digital output port, at the signal Reason and output circuit also include a transport module, and the transport module is connected to the output end of the diagnostic module and the numeral Between output port, for transmitting the diagnostic state data.
According to another aspect of the invention, the simulation weighing sensor also includes a digital output port, at the signal Reason and output circuit also include a transport module, and the transport module is connected to the output end of the diagnostic module and the numeral Between output port, for transmitting the diagnostic state data.
The present invention can not only introduce temperature-compensating, creep and lag compensation in weighing sensor is simulated, and realize high-precision The simulation weighing-up wave output of degree.And can makes the interface of simulation weighing sensor keep simple, general, dynamic following performance simultaneously The advantages of good.In addition, the microprocessor in the simulation weighing sensor of the present invention can also be examined working sensor state Disconnected analysis, and communicated by data-out port and peripheral hardware, there is provided additional digital function.
It should be appreciated that the general description and the following detailed description more than present invention is all exemplary and explanat, And it is intended that the present invention as claimed in claim provides further explanation.
Brief description of the drawings
It is that they are included and form the part of the application to provide further understanding of the invention including accompanying drawing, Accompanying drawing shows embodiments of the invention, and plays a part of the explanation principle of the invention together with this specification.In accompanying drawing:
Fig. 1 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Fig. 2 is the signal transacting of simulation weighing sensor according to an embodiment of the invention and the schematic diagram of output circuit.
Fig. 3 is the signal according to the signal transacting and output circuit of the simulation weighing sensor of further embodiment of this invention Figure.
Fig. 4 is the signal according to the signal transacting and output circuit of the simulation weighing sensor of further embodiment of this invention Figure.
Fig. 5 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Fig. 6 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Fig. 7 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Fig. 8 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Fig. 9 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.
Embodiment
Embodiments of the invention are described with detailed reference to accompanying drawing now.
Fig. 1 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.As shown in figure 1, simulation is weighed Sensor 100 includes:One elastomer 102, the elastomer occur according to the pressure that the simulation weighing sensor senses Deformation;One foil gauge 104, the foil gauge are connected to the elastomer and produce the change of resistance value according to the deformation Change;One foil gauge bridge 106, the foil gauge bridge are connected to the foil gauge, transmit the change of the resistance value to export First analog signal;One analog-to-digital conversion module 108, the output end of the foil gauge bridge of simulation weighing sensor is connected to, is received The first analog signal from the foil gauge bridge, and first analog signal is converted into the first data signal, its In, first analog signal is to represent the analog signal of weight;One simulation output port 116, export the second analog signal.Institute Stating simulation weighing sensor also includes a signal transacting and output circuit 110, is connected to the output of the analog-to-digital conversion module 108 Between end and the simulation output port 116, first data signal is compensated and converts thereof into second mould Intend signal.
Simulation weighing sensor 100 shown in Fig. 1 also includes digital output port 118, signal transacting and output circuit 110 Output exported also by digital output port 118.In one embodiment, digital output port 118 can be according to user Needs, export digital weighing information.
Fig. 2 is the signal transacting of simulation weighing sensor according to an embodiment of the invention and the schematic diagram of output circuit. Signal transacting and output circuit 110 include:One compensating module 212, it is connected to the defeated of the analog-to-digital conversion module 108 (see Fig. 1) Go out end, first data signal is compensated to obtain the first compensated data signal;An and D/A converter module 214, the output end of the compensating module 212 is connected to, the first compensated data signal is received and converts thereof into institute State the second analog signal.Second analog signal is further exported by simulation output port 116 (see Fig. 1).
Fig. 3 is the signal according to the signal transacting and output circuit of the simulation weighing sensor of further embodiment of this invention Figure.Signal transacting and output circuit 110 include:One compensating module 312, the output end of the analog-to-digital conversion module 108 is connected to, First data signal is compensated to obtain representing the second data signal of compensated analog signal amount;One digital-to-analogue turns Block 314 is changed the mold, is connected to the output end of the compensating module 312, second data signal is received and converts thereof into the 3rd Analog signal;And an operational amplification circuit 316, be connected to simulation weighing sensor foil gauge bridge 106 output end with And the output end of the D/A converter module 314, first analog signal and the 3rd analog signal are received to be superimposed Generate second analog signal.Second analog signal is further exported by simulation output port 116 (see Fig. 1).
Fig. 4 is the signal according to the signal transacting and output circuit of the simulation weighing sensor of further embodiment of this invention Figure.Signal transacting and output circuit 110 include:One compensating module 412, the output end of the analog-to-digital conversion module 108 is connected to, First data signal is compensated to obtain compensated analog signal amount;One pulse width modulation module 414, is connected to institute The output end of compensating module 412 is stated, pulsewidth modulation is carried out to compensated analog signal amount with square wave and believed with obtaining the 4th simulation Number;And an add circuit 416, it is connected to the output end of the foil gauge bridge 106 of simulation weighing sensor and the pulsewidth The output end of modulation module 414, first analog signal and the 4th analog signal are received to be superimposed generation described the Two analog signals.Second analog signal is further exported by simulation output port 116 (see Fig. 1).
Fig. 5 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.Simulation shown in Fig. 5 is weighed biography Simulation weighing sensor 100 shown in sensor 500 and Fig. 1 differs only in, and simulation weighing sensor 500 also includes a temperature Sensor 502, the output end of the temperature sensor 502 are connected to an input of the analog-to-digital conversion module 508, the temperature Spend the analog signal of the acquisition tables temperature displaying function of sensor 502 and export to the input of the analog-to-digital conversion module 508, wherein, The analog signal for representing temperature and first analog signal are converted into described first by analog-to-digital conversion module 508 together Data signal.Signal transacting and output circuit 510 shown in Fig. 5 can also be such as Fig. 2-4 signal transactings and output circuit 110 Each embodiment shown in as have a variety of implementations.Fig. 5 miscellaneous part and function be corresponding with Fig. 1 and class Seemingly, will not be described here.
Fig. 6 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.Simulation shown in Fig. 6 is weighed biography The difference of simulation weighing sensor 100 shown in sensor 600 and Fig. 1 is that simulation weighing sensor 600 also includes a diagnosis mould Block 604, the diagnostic module 604 are connected to an output end and the signal transacting and the output of the analog-to-digital conversion module 108 Between one input of circuit 610, first analog signal is analyzed to obtain representing the work of the simulation weighing sensor The diagnostic state data are simultaneously sent to the signal transacting and output circuit 610 by the diagnostic state data of state.Shown in Fig. 6 Simulation weighing sensor 600 and Fig. 1 shown in the difference of simulation weighing sensor 100 also reside in, signal transacting and output electricity Road 610 includes:One compensating module 612, the output end of the analog-to-digital conversion module 108 is connected to, to first data signal Compensate to obtain the first compensated data signal;One D/A converter module 614, it is connected to the compensating module 612 Output end, receive the first compensated data signal and convert thereof into second analog signal;And one transmission mould Block 616, it is connected between output end and the digital output port 118 of the diagnostic module 604, for transmitting the diagnostic state Data.Fig. 6 miscellaneous part and function is corresponding and similar with Fig. 1, will not be described here.
Fig. 7 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.Simulation shown in Fig. 7 is weighed biography The difference of simulation weighing sensor 600 shown in sensor 600 and Fig. 6 is that simulation weighing sensor 600 also includes a temperature and passed Sensor 702, the output end of the temperature sensor 702 are connected to an input of the analog-to-digital conversion module 708, the temperature The analog signal of the acquisition tables temperature displaying function of sensor 702 and export to the input of the analog-to-digital conversion module 708, wherein, institute State the analog signal for representing temperature and first analog signal and first number is converted into by analog-to-digital conversion module 708 together Word signal.Fig. 7 miscellaneous part and function is corresponding and similar with Fig. 6, will not be described here.
Fig. 8 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.Simulation shown in Fig. 8 is weighed biography The difference of simulation weighing sensor 700 shown in sensor 800 and Fig. 7 is, signal transacting and output circuit 810 shown in Fig. 8 Different from the signal transacting shown in Fig. 7 and output circuit 710.Specifically, signal transacting and output circuit 810 include:One mends Module 812 is repaid, is connected to the output end of the analog-to-digital conversion module 808, first data signal is compensated to obtain Represent the second data signal of compensated analog signal amount;One D/A converter module 814, it is connected to the compensating module 812 Output end, receive second data signal and simultaneously convert thereof into the 3rd analog signal;One operational amplification circuit 816, connection To the output end of foil gauge bridge 106 and the output end of the D/A converter module 814 of simulation weighing sensor, institute is received The first analog signal and the 3rd analog signal are stated to be superimposed generation second analog signal;An and transport module 816, it is connected between output end and the digital output port 118 of the diagnostic module 804, for transmitting the diagnostic state number According to.Fig. 8 miscellaneous part and function is corresponding and similar with Fig. 7, will not be described here.
Fig. 9 is the schematic diagram according to the simulation weighing sensor of one embodiment of the invention.Simulation shown in Fig. 9 is weighed biography The difference of simulation weighing sensor 700 shown in sensor 900 and Fig. 7 is, signal transacting and output circuit 910 shown in Fig. 9 Different from the signal transacting shown in Fig. 7 and output circuit 710.Specifically, signal transacting and output circuit 910 include:One mends Module 912 is repaid, is connected to the output end of the analog-to-digital conversion module 908, first data signal is compensated to obtain Compensated analog signal amount;One pulse width modulation module 914, the output end of the compensating module 912 is connected to, with square wave to warp The analog signal amount of compensation carries out pulsewidth modulation to obtain the 4th analog signal;One add circuit 916, it is connected to simulation and weighs biography The output end of the foil gauge bridge 106 of sensor and the output end of the pulse width modulation module 914, receive the first simulation letter Number and the 4th analog signal to be superimposed generation second analog signal;And a transport module 916, it is connected to described Between the output end and digital output port 118 of diagnostic module 904, for transmitting the diagnostic state data.Fig. 9 other portions Part and function are corresponding and similar with Fig. 7, will not be described here.
Those skilled in the art can be obvious, can to the present invention above-mentioned example embodiment carry out various modifications and variations and Without departing from the spirit and scope of the present invention.Accordingly, it is intended to present invention covering is set to fall in appended claims and its equivalence techniques Modifications of the present invention and modification in aspects.

Claims (7)

1. one kind simulation weighing sensor, including:
One elastomer (102), the elastomer deform upon according to the pressure that the simulation weighing sensor senses;
One foil gauge (104), the foil gauge are connected to the elastomer and produce the change of resistance value according to the deformation Change;
One foil gauge bridge (106), the foil gauge bridge are connected to the foil gauge, transmit the change of the resistance value with defeated Go out the first analog signal;
One analog-to-digital conversion module (108), the output end of the foil gauge bridge of simulation weighing sensor is connected to, is received from described First analog signal of foil gauge bridge, and first analog signal is converted into the first data signal, wherein, described One analog signal is to represent the analog signal of weight;
One simulation output port (116), the second analog signal is exported,
Characterized in that,
The simulation weighing sensor also includes a signal transacting and output circuit (110), is connected to the analog-to-digital conversion module (108) between output end and the simulation output port (116), first data signal is compensated and is converted Into second analog signal
Wherein, the signal transacting and output circuit (110) include:
One compensating module (312), the output end of the analog-to-digital conversion module (108) is connected to, first data signal is entered Row is compensated to obtain representing the second data signal of compensated analog signal amount;
One D/A converter module (314), the output end of the compensating module (312) is connected to, receives second data signal And convert thereof into the 3rd analog signal;And
One operational amplification circuit (316), it is connected to the output end of foil gauge bridge (106) of simulation weighing sensor and described The output end of D/A converter module (314), first analog signal and the 3rd analog signal are received to be superimposed generation Second analog signal.
2. one kind simulation weighing sensor, including:
One elastomer (102), the elastomer deform upon according to the pressure that the simulation weighing sensor senses;
One foil gauge (104), the foil gauge are connected to the elastomer and produce the change of resistance value according to the deformation Change;
One foil gauge bridge (106), the foil gauge bridge are connected to the foil gauge, transmit the change of the resistance value with defeated Go out the first analog signal;
One analog-to-digital conversion module (108), the output end of the foil gauge bridge of simulation weighing sensor is connected to, is received from described First analog signal of foil gauge bridge, and first analog signal is converted into the first data signal, wherein, described One analog signal is to represent the analog signal of weight;
One simulation output port (116), the second analog signal is exported,
Characterized in that,
The simulation weighing sensor also includes a signal transacting and output circuit (110), is connected to the analog-to-digital conversion module (108) between output end and the simulation output port (116), first data signal is compensated and is converted Into second analog signal;Wherein, the signal transacting and output circuit (110) include:
One compensating module (412), the output end of the analog-to-digital conversion module (108) is connected to, first data signal is entered Row is compensated to obtain compensated analog signal amount;
One pulse width modulation module (414), the output end of the compensating module (412) is connected to, with square wave to compensated simulation Semaphore carries out pulsewidth modulation to obtain the 4th analog signal;And
One add circuit (416), it is connected to the output end of the foil gauge bridge (106) of simulation weighing sensor and the pulsewidth The output end of modulation module (414), first analog signal and the 4th analog signal are received to be superimposed described in generation Second analog signal.
3. the simulation weighing sensor as described in any one of claim 1-2, it is characterised in that the simulation weighing and sensing Device also includes a temperature sensor (502), and the output end of the temperature sensor (502) is connected to the analog-to-digital conversion module (508) a input, the analog signal and output to the modulus of temperature sensor (502) the acquisition tables temperature displaying function turn The input of block (508) is changed the mold,
Wherein, the analog signal for representing temperature and first analog signal are converted into the first numeral letter together Number.
4. the simulation weighing sensor as described in any one of claim 1-2, it is characterised in that the simulation weighing and sensing Device also includes a diagnostic module (604), and the diagnostic module (604) is connected to an output of the analog-to-digital conversion module (108) Between end and an input of the signal transacting and output circuit (610), first analog signal is analyzed to be represented The diagnostic state data are simultaneously sent to the signal by the diagnostic state data of the working condition of the simulation weighing sensor Processing and output circuit (610).
5. the simulation weighing sensor as described in any one of claim 1-2, it is characterised in that the simulation weighing and sensing Device also includes:
One temperature sensor (702), the output end of the temperature sensor (702) are connected to the analog-to-digital conversion module (708) An input, the analog signal of temperature sensor (702) the acquisition tables temperature displaying function and export to the analog-to-digital conversion mould The input of block (708), the analog signal for representing temperature and first analog signal are converted into described first together Data signal;And
One diagnostic module (704), the diagnostic module (704) be connected to the analog-to-digital conversion module (708) an output end and Between one input of the signal transacting and output circuit (710), first analog signal is analyzed with described in obtaining representing Simulate the diagnostic state data of the working condition of weighing sensor and the diagnostic state data are sent to the signal transacting And output circuit (710).
6. simulation weighing sensor as claimed in claim 4, it is characterised in that the simulation weighing sensor also includes a number Word output port (118), the signal transacting and output circuit (610) also include a transport module (616), the transport module (616) it is connected between the output end of the diagnostic module (604) and the digital output port (118), it is described for transmitting Diagnostic state data.
7. simulation weighing sensor as claimed in claim 5, it is characterised in that the simulation weighing sensor also includes a number Word output port (118), the signal transacting and output circuit (710,810,910) also include a transport module (716,816, 916), the transport module (716,816,916) is connected to the output end of the diagnostic module (704,804,904) and the number Between word output port (118), for transmitting the diagnostic state data.
CN201310538774.5A 2013-11-01 2013-11-01 Simulation weighing sensor with digital compensation function Active CN104614055B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201310538774.5A CN104614055B (en) 2013-11-01 2013-11-01 Simulation weighing sensor with digital compensation function
PCT/CN2014/089984 WO2015062535A1 (en) 2013-11-01 2014-10-31 Analog sensor with digital compensation function
EP14858032.7A EP3063514B1 (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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Application Number Priority Date Filing Date Title
CN201310538774.5A CN104614055B (en) 2013-11-01 2013-11-01 Simulation weighing sensor with digital compensation function

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CN104614055B true CN104614055B (en) 2017-11-10

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