CN201680887U - Integrated digital strain weighing sensor - Google Patents
Integrated digital strain weighing sensor Download PDFInfo
- Publication number
- CN201680887U CN201680887U CN2010201737756U CN201020173775U CN201680887U CN 201680887 U CN201680887 U CN 201680887U CN 2010201737756 U CN2010201737756 U CN 2010201737756U CN 201020173775 U CN201020173775 U CN 201020173775U CN 201680887 U CN201680887 U CN 201680887U
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- chip microcomputer
- circuit board
- printed circuit
- elastic body
- pcb
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Abstract
The utility model discloses an integrated digital strain weighing sensor, which comprises an elastic body (5), a weighing strain gauge (1), a printed circuit board and a single chip microcomputer (2). The weighing strain gauge (1) which is adhered onto the middle surface of the elastic body, sealed by damp-proof adhesives and used for measuring weight of a measured object to generate analogue values indicating weight, the printed circuit board is arranged in the tail end of the elastic body and connected with the strain gauge, the single chip microcomputer fixedly connected onto the printed circuit board calculates the analog values and outputs digital signals which are directly connected with a display driving chip and indicates the weight of the object, and the printed circuit board and the single chip microcomputer connected to the same are integrally coated and sealed by the damp-proof adhesives. Compared with the prior art, the integrated digital strain weighing sensor is small in volume, strong in damp-proof and anti-interference abilities, simple and convenient in production procedures, low in development threshold and fast in development period without being externally connected with temperature compensation wires to compensate temperatures.
Description
Technical field
The utility model relates to the sensor of check weighing amount, relates in particular to a kind of integrated form numeral strain load cell that check weighing strainometer and control arithmetic section are integrated.
Background technology
Existing electronic price computing scale, electronic platform scale, electronic weighing scale, electronic counting scale or electronics Libra will use the strainometer of check weighing amount, because strainometer is the separate type layout with mainboard, middle long cable transmits analog signal; Add to make external modulus circuit more complicated, panel also school is big, so handle relatively difficulty in protection against the tide and ELECTROMAGNETIC RADIATION SHIELDING measure, it is relatively poor to cause the product anti-electromagnetic-radiation to disturb.Especially adopt double integrator to make analog-to-digital traditional scheme, because peripheral components is more, to damp and hot responsive more.Even use good sensor,, just can't produce qualified product if do not have enough technology and working condition.Because of above-mentioned reason usually causes can't pass in the product sampling observation humid test, anti-electromagnetic-radiation test, damp heat test.
The utility model content
The utility model is the problems referred to above that will solve prior art, proposes a kind of integrated form numeral strain load cell that check weighing strainometer and control arithmetic section are integrated.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of integrated form numeral of design strain load cell, it comprises: elastic body, the measurement testee weight that is affixed on the elastic body intermediate surface and seals up moistureproof glue produces the check weighing strainometer of the simulation value of expression weight of object, place in the elastic body end and the printed circuit board (PCB) that is connected with strainometer, be fastened on and on the printed circuit board (PCB) described simulation value carried out the single-chip microcomputer of digital signal that computing and output can directly connect the expression weight of object of display driver chip, described printed circuit board (PCB) wraps up moistureproof glue together with the single-chip microcomputer integral sealing on it.
The built-in measures ambient temperature of above-mentioned single-chip microcomputer can be made the temperature sensor of temperature compensation to the varying environment temperature.
The screen layer that above-mentioned moistureproof glue outside parcel anti-electromagnetic-radiation disturbs.
Compared with prior art, the utlity model has numerous advantages: 1, integrate the integrated form design, not only volume-diminished, and anti-interference and wetting resistance reinforcement, the developer need not to handle the jamproof problem of electromagnetic radiation and takes shielding measure.2, the sensor built-in temperature sensor is handled as robotization digital zero wooden dipper, simplifies the sensor production program, need not to follow the zero wooden dipper data according to each sensor, does the temperature compensation of different temperatures with the temperature compensation silk of staff welding different length.3, built-in temperature sensor can save the electron device that Wen Du Fill Compensation strain ga(u)ge (temperature compensation sheet) and peripheral low temperature waft as the digital temperature compensation of sensitivity.4, the integrated design temperature of can disposable system to whole sensor and analog line doing zero point and sensitivity is waftd and is dealt with, and need not again at weighing sensor and analog line separate processes.5, digital sensor can be developed through special-purpose developers connection personal computer, and the programmer can directly develop on digital sensor, need not to design single-chip microcomputer and analog line again.6, development platform provides temperature compensation, and digital filtering chases after zero, plug-in card programs such as linear compensation, and the programmer need not treatment of simulated signal noise, problems such as linear and warm wooden dipper, the technology door of order requirements is extremely low, develops simple and fast.7, integrated design makes peripheral circuit also become very simple, and the output of digital strain transducer can directly connect display driver IC, does not have external single-chip microcomputer and analog line, and it is convenient to produce the utmost point, the tool cost competitiveness.
Description of drawings
Below in conjunction with drawings and Examples the utility model is made detailed explanation, wherein:
Fig. 1 is the theory diagram of the utility model preferred embodiment;
Fig. 2 is the outside drawing of the utility model preferred embodiment;
Fig. 3 is the circuit block diagram of utilization example of the present utility model.
Embodiment
The disclosed integrated form numeral of the utility model strain load cell, it comprises: elastic body 5, the measurement testee weight that is affixed on the elastic body intermediate surface and seals up moistureproof glue produces the check weighing strainometer 1 of the simulation value of expression weight of object, place in the elastic body end and the printed circuit board (PCB) (PCB) that is connected with strainometer, be fastened on and on the printed circuit board (PCB) described simulation value carried out the single-chip microcomputer 2 of digital signal that computing and output can directly connect the expression weight of object of display driver chip, described printed circuit board (PCB) wraps up moistureproof glue together with the single-chip microcomputer integral sealing on it.
In preferred embodiment, described single-chip microcomputer 2 built-in measures ambient temperature are so that 2 pairs of varying environment temperature of single-chip microcomputer are made the temperature sensor of temperature compensation.The screen layer 4 that described moistureproof glue outside parcel anti-electromagnetic-radiation disturbs.
Fig. 1 shows the theory diagram of the utility model preferred embodiment, and these single-chip microcomputer 2 built-in measures ambient temperature are so that 2 pairs of varying environment temperature of single-chip microcomputer are made the temperature sensor of temperature compensation.As shown in Figure 1 single-chip microcomputer 2 also built-in with the digitized high precision analogue converting unit of described simulation value (∑-Δ ADC), the storage data storage unit (E2PROM), arithmetic element (MCU).So be provided with the single-chip microcomputer of high precision ∑-Δ ADC, built-in semiconductor temperature sensor (SoC MCU) is contained in the little pcb board of a slice, volume greatly dwindles.Product is done the zero processing of wafing earlier when dispatching from the factory, this sensor as in the constant temperature oven, is calculated the zero parameter of wafing, and is stored in the E2PROM under different temperatures.During normal weighing, measure the prevailing circumstances temperature, call the parameter in the E2PROM, make corresponding temperature compensation.Thereby replace the compensation method of tradition, make the production routine robotization with the temperature compensation silk.
Fig. 2 has showed the outward appearance of the utility model preferred embodiment, and with traditional sensor one picture, strainometer is attached to the centre position of surface of elastomer.Different is that end value is gone into printed circuit board (PCB) behind the elastic body, does the processing of analog signal, carries out computing with the analog signal of the running strainometer output of the operation of Households interface and other functions through the single-chip microcomputer on the PCB.Icon 5 is an elastic body, and icon 1 is the check weighing strainometer, and the tight connection PCB of an end of its outlet seals the full wafer pcb board with moistureproof glue, then to reach moisture effect.Becoming very by the above-mentioned analog signal line of what, Duan improves the anti-electromagnetic-radiation interference capability greatly.The screen layer 4 that anti-electromagnetic-radiation disturbs is also wrapped up in the moistureproof glue outside, and one step of anti-electromagnetic-radiation interference capability Ke Jin adds Strong.Icon 3 is the extension line of integrated form numeral strain load cell.
Fig. 3 has showed the circuit block diagram of utilization example of the present utility model, and it is very simple that its peripheral circuit becomes, and this utility model directly connects display driver chip on the display board, need not external single-chip microcomputer again, does two-way communication with digital signal, to show the weighing result.Tong Time, the capable key scan of display driver Xin Pian Jin is linked up with Households operation Tou Over display driver chip and above-mentioned single-chip microcomputer.
This integrated form numeral strain load cell can connect personal computer through special-purpose developers to be developed, and the programmer can directly develop on this sensor, need not to design single-chip microcomputer and artificial line again.Open development platform provides temperature compensation, and digital filtering chases after zero, plug-in card programs such as linear compensation.
Above embodiment is only for illustrating non-providing constraints.Anyly do not break away from spirit of the present invention and category, and, all should be contained among the application's the claim scope its equivalent modifications of carrying out or change.
Claims (3)
1. integrated form numeral strain load cell, it is characterized in that comprising: elastic body (5), the measurement testee weight that is affixed on the elastic body intermediate surface and seals up moistureproof glue produces the check weighing strainometer (1) of the simulation value of expression weight of object, place in the elastic body end and the printed circuit board (PCB) that is connected with strainometer, be fastened on and on the printed circuit board (PCB) described simulation value carried out the single-chip microcomputer (2) of digital signal that computing and output can directly connect the expression weight of object of display driver chip, described printed circuit board (PCB) wraps up moistureproof glue together with the single-chip microcomputer integral sealing on it.
2. integrated form numeral strain load cell as claimed in claim 1, it is characterized in that: the built-in measures ambient temperature of described single-chip microcomputer (2) is so that single-chip microcomputer (2) is made the temperature sensor of temperature compensation to the varying environment temperature.
3. integrated form numeral strain load cell as claimed in claim 1 is characterized in that: the screen layer (4) that described moistureproof glue outside parcel anti-electromagnetic-radiation disturbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201737756U CN201680887U (en) | 2010-04-23 | 2010-04-23 | Integrated digital strain weighing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201737756U CN201680887U (en) | 2010-04-23 | 2010-04-23 | Integrated digital strain weighing sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201680887U true CN201680887U (en) | 2010-12-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201737756U Expired - Fee Related CN201680887U (en) | 2010-04-23 | 2010-04-23 | Integrated digital strain weighing sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201680887U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169007A (en) * | 2010-12-27 | 2011-08-31 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
| CN104634425A (en) * | 2015-02-07 | 2015-05-20 | 马俊 | Electronic scale with temperature compensating function |
| CN104758186A (en) * | 2015-03-13 | 2015-07-08 | 东莞捷荣技术股份有限公司 | Intelligent feeding bottle cover capable of weighting at night and application method and system thereof |
-
2010
- 2010-04-23 CN CN2010201737756U patent/CN201680887U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169007A (en) * | 2010-12-27 | 2011-08-31 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
| CN102169007B (en) * | 2010-12-27 | 2013-04-24 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
| CN104634425A (en) * | 2015-02-07 | 2015-05-20 | 马俊 | Electronic scale with temperature compensating function |
| CN104758186A (en) * | 2015-03-13 | 2015-07-08 | 东莞捷荣技术股份有限公司 | Intelligent feeding bottle cover capable of weighting at night and application method and system thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20120423 |