CN204535739U - A kind of data collector - Google Patents
A kind of data collector Download PDFInfo
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- CN204535739U CN204535739U CN201520281869.8U CN201520281869U CN204535739U CN 204535739 U CN204535739 U CN 204535739U CN 201520281869 U CN201520281869 U CN 201520281869U CN 204535739 U CN204535739 U CN 204535739U
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Abstract
The utility model discloses a kind of data collector, and described device comprises sensor, pre-filtering block, integrated amplification module, A/D modular converter, main control module and display module; Described sensor is used for measurand metrical information and sends to pre-filtering block, pre-filtering block carries out filtering to the analog information received and sends to integrated amplification module, integrated amplification module amplifies the simulating signal received and sends to A/D modular converter, A/D modular converter is converted into digital signal to the simulating signal received and sends to main control module, and main control module processes digital signal and sends to display module to show.The utility model achieves in real time, timing and repetitive measurement.
Description
Technical field
This transmission belongs to DATA REASONING field, particularly relates to a kind of data collector.
Background technology
Along with rhythm of life is accelerated, for Various types of data information measurement become people to health and life index criterion, for all kinds of measurement data, need various sensor, as measured body weight, need pressure transducer, so just cause the function singleness of survey instrument, also result in the waste of resource.
Therefore, for providing a kind of device not only measuring a kind of data message to necessitate.
Summary of the invention
Object first aspect of the present invention is to provide a kind of data collector, and described device comprises:
Sensor 1, is connected with pre-filtering block 2, for measuring measurand data message and sending to pre-filtering block 2; Pre-filtering block 2, is connected with integrated amplification module 3, for measuring the data-signal filtering that obtains and sending to integrated amplification module 3; Integrated amplification module 3, is connected with A/D modular converter 4, for simulating signal being amplified and sending to A/D modular converter 4; A/D modular converter 4, is connected with main control module 5, for simulating signal being converted into digital signal and sending to main control module 5; Main control module 5, is connected with display module 6, for the digital signal processing received and by process after digital signal send to display module 6; Display module 6, for showing measurand data message; Described main control module 5 comprise without low-power consumption standby pattern when measuring, have a measurement time the reset mode waken up in mode of operation, measuring process.
Further, the interference of described pre-filtering block 2 filtering random signal and noise fluctuations.
Further, the simulating signal after integrated amplification module 3 amplifies is converted into corresponding digital quantity by described A/D modular converter 4, and digital signal is sent to main control module 5.
Further, original state value is detected when described main control module 5 comprises the free time.
Further, described main control module 5 is responsible for coordination data collecting work, comprises the open and close of sensor 1, Timing measurement and reset.
Further, described main control module 5 comprise measurement data is stored, filtering, check data and send the data to display module 6 and show.
Further, described data collector adopts direct voltage source to power to sensor 1.
The present invention has following beneficial effect:
Adopt the present invention by changing different sensors, can realize measuring different pieces of information information; Main control module of the present invention provide without low-power consumption standby pattern when measuring, have a measurement time the reset mode Three models waken up in mode of operation, measuring process, achieve low-power consumption, automatically wake up and again measure auto-reset function; Apparatus of the present invention are simple to operate, are applicable to end crowd of each age and use.
Accompanying drawing explanation
Fig. 1 is a kind of data collector composition of embodiment of the present invention structural drawing;
Fig. 2 is the strain pressure transducer circuit diagram of a kind of data collector of the embodiment of the present invention;
Fig. 3 is the pre-filter circuit figure of the pre-filtering block of a kind of data collector of the embodiment of the present invention;
Fig. 4 is the A/D modular converter chip pin figure of a kind of data collector of the embodiment of the present invention;
Fig. 5 is the process flow diagram of the collecting method of another embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
Fig. 1 is a kind of data collector composition of embodiment of the present invention structural drawing.
As shown in Figure 1, data collector of the present invention comprises: sensor 1, is connected with pre-filtering block 2, for measuring measurand data message and sending to pre-filtering block 2; Pre-filtering block 2, is connected with integrated amplification module 3, for measuring the data-signal filtering that obtains and sending to integrated amplification module 3; Integrated amplification module 3, is connected with A/D modular converter 4, for simulating signal being amplified and sending to A/D modular converter 4; A/D modular converter 4, is connected with main control module 5, for simulating signal being converted into digital signal and sending to main control module 5; Main control module 5, is connected with display module 6, for the digital signal processing received and by process after digital signal send to display module 6; Display module 6, for showing measurand data message; Described main control module 5 comprise without low-power consumption standby pattern when measuring, have a measurement time the reset mode waken up in mode of operation, measuring process.
It should be noted that, the Three models of main control module, without low-power consumption standby pattern when measuring, have a measurement time the reset mode waken up in mode of operation, measuring process; Refer to that this data collector enters low-power consumption standby pattern automatically when data collector does not carry out DATA REASONING without low-power consumption standby pattern when measuring; Again need setting one clock cycle T 1, when sensor does not receive outside stimulus at clock period T2, automatically enter holding state.
Mode of operation is waken up when having a measurement, when sensor is subject to outside stimulus, this data collector Auto Power On also enters measuring state, and starts a series of operation step and play, and comprises sensor measurement data, filtering, amplification, A/D conversion, data processing and display.
Reset mode in measuring process, when needs repetitive measurement, arranges clock period T2, when first has measured, through the T2 time, has automatically reset and starts to measure next time.
Preferably, the interference of described pre-filtering block 2 filtering random signal and noise fluctuations.
Preferably, the simulating signal after integrated amplification module 3 amplifies is converted into corresponding digital quantity by described A/D modular converter 4, and digital signal is sent to main control module 5.
Preferably, original state value is detected when described main control module 5 comprises the free time.
Preferably, described main control module 5 is responsible for coordination data collecting work, comprises the open and close of sensor 1, Timing measurement and reset.
Preferably, described main control module 5 comprise measurement data is stored, filtering, check data and send the data to display module 6 and show.
Preferably, described data collector adopts direct voltage source to power to sensor 1.
Particularly, below to obtain weight data information, sensor 1 adopts high precision diplopore cantilever balance beam strain gauge load cell, main control module 5 adopts MSP430F149 to adopt LCD1602 Character Mode LCD to be that example specifically introduces data collector of the present invention as the main control chip of this device and display module.
Fig. 2 is the circuit diagram of the strain pressure transducer of the data collector of the embodiment of the present invention.
As shown in Figure 2, the principle of work of the strain pressure transducer of the data collector of the present embodiment is as follows, resistance strain gage is pasted on the power responsive type flexible member of pressure transducer, when to pressure transducer imposed load, the power responsive type flexible member of its inside produces deformation, make resistance strain gage also produce corresponding strain, finally change the change of resistance into.When pressure transducer is powered, its inside can be equivalent to the bridge diagram as Fig. 2, the change of foil gauge resistance is converted to the change in voltage of metering circuit by circuit, export the differential electric signal of Signal-and Signal+ two-port, the body weight numerical value of gauger can be obtained by the process of subsequent conditioning circuit and computing.
The equal connecting resistance foil gauge of four brachium pontis of pressure sensor inside electric bridge, four resistance strain gages exist together a temperature field, and temperature produces equal temperature drift impact to four foil gauges.When the material of four resistance strain gages is all identical with resistance, the temperature drift impact of foil gauge is cancelled out each other, and the sensitivity of output signal is very high.The deflection of pressure transducer is very small, will pay special attention to not overload in installation, use procedure; If shape can not be resiled after external force is removed, there is plastic yield, then illustrate that sensor damages.Sensor has four lines to connect external circuit, and red line is positive source input, and black line is power cathode input, and white line is signal output part Sensor-, and green line is signal output part Sensor+.For ensureing output accuracy, the line length of sensor arbitrarily can not be adjusted.And pressure transducer could need use after demarcating.
Fig. 3 is the pre-filter circuit figure of the pre-filtering block of the data collector of the embodiment of the present invention.
As shown in Figure 3, in the pre-filtering of the pre-filtering block of the data collector of the present embodiment, pre-filter circuit is between pressure transducer and A/D modular converter, for carrying out filtering to sensor raw signals, filtered signal is sent into A/D modular converter.As shown in Figure 3, wherein Sensor-is the signal output negative terminal of pressure transducer to pre-filter circuit, and Sensor+ is the signal output plus terminal of pressure transducer, exports as Signal-and Signal+ after capacitor and inductor filter network.Electric capacity has the performance that stopping direct current leads to interchange, so the indirect electric capacity on signal and ground in circuit, just the AC influence composition short circuit in signal can be entered (GND); Inductance is path to direct current signal, has barrier effect to the AC signal of certain frequency, so series inductance makes the AC influence composition in signal not pass to rear class in circuit, thus is entered ground by capacitance short-circuit.R1 and R2 two resistance of pre-filter circuit mainly play metering function, protection A/D modular converter; For ensureing the reliability of sensor differential output signal, the resistance of two resistance should be made as far as possible equal, and two precision resistances that the present invention uses resistance equal are as R1 and R2.
Preferably, electric capacity C1 is 0.1uF, electric capacity C2 is 0.1uF, electric capacity C3 is 0.1uF, electric capacity C4 is 0.1uF, electric capacity C5 is 0.1uF, electric capacity C6 be 0.1uF, R1 be 1K Ω, R2 is 1K Ω, inductance L 1 for 100uH and inductance L 2 be 100uH.
Fig. 4 is the A/D modular converter chip pin figure of the data collector of the embodiment of the present invention.
As shown in Figure 4, the A/D modular converter chip of the data collector of the present embodiment adopts high-precision A/D conversion chip HX711, the pin distribution of HX711 conversion chip as shown in Figure 4, HX711 aly aims at high-precision weighing pressure transducer and 24 the A/D converter chips designed, its inside is integrated with low-noise programmable amplifier, can choose arbitrarily passage A or channel B is connected with low-noise programmable amplifier as signal input port.The programmable-gain of passage A is 128 or 64, and corresponding full scale differential input signal amplitude is respectively ± 20mV or ± 40mV; Channel B is then 64 fixing gains, detects for systematic parameter.Compared with other chip of the same type, HX711 integrated chip comprises other peripheral circuit required for chip of the same type such as stabilized voltage supply, on-chip clock oscillator, has advantages such as integrated level is high, fast response time, strong interference immunity.
Precision 24 A/D chip HX711 have following characteristics: 1. two-way selectable differential signal input mouth A and channel B; 2. low-noise programmable amplifier in sheet, selectable gain is 64 and 128; 3. in sheet, mu balanced circuit can provide power supply directly to A/D converter in external sensor and chip; 4. on-chip clock oscillator is without the need to any external device, also can use external crystal oscillator or clock if desired; 5. automatic power-on reset circuit; 6. simply digital control and serial communication: all control is inputted by pin, in chip, register is without the need to programming; 7. the output data rate of 10Hz or 80Hz can be selected; 8. the power supply disturbance etc. of 50Hz and 60Hz is synchronously suppressed.
It should be noted that, for powerup issue, generally have two kinds of modes, a kind of is adopt the Voltage stabilizing module of HX711 chip internal to power; Another kind be supply voltage after filtering directly for pressure transducer is powered, namely do not use the Voltage stabilizing module of HX711 chip internal.
Through repeatedly testing discovery, the Voltage stabilizing module less stable of HX711 chip internal, there is the situation of Voltage stabilizing module Non voltage output in occasional.Therefore, the embodiment of the present invention adopts power supply to power directly to pressure transducer, but just requires that the quality of supply voltage is better like this, and the parameters such as the temperature as voltage is floated, ripple are as far as possible little.
The capacity of display of LCD1602 Liquid Crystal Module is 16 × 2 characters, chip operating voltage is 4.5 ~ 5.5V, working current is 2.0mA (voltage 5.0V), LCD1602 adopts 14 pin (without backlight) or 16 pin (band backlight) interface of standard, the embodiment of the present invention selects 16 pin Liquid Crystal Modules, principle of work according to Liquid Crystal Module carries out operating the display translation that can control Liquid Crystal Module to its each pin, and the pin interface of LCD1602 Liquid Crystal Module illustrates as shown in table 1.
Table 1
Wherein, the 3rd pin VL is liquid crystal display setting contrast end, and when connecing positive supply, contrast is the most weak, and during ground connection, contrast is the highest, can produce " ghost " when contrast is too high, can by the potentiometer adjustment contrast of a 10K during use; 4th pin RS is register selecting side, selection instruction register when selection data register, low level during high level; 5th pin R/W is reading writing signal line, carries out read operation during high level, carries out write operation during low level; When RS and R/W is jointly for writing instruction or display address during low level, can busy signal be read when RS be low level R/W is high level, can data be write when RS be high level R/W is low level; 6th pin E holds as Enable Pin, when E end is become low level by high level saltus step, and Liquid Crystal Module fill order; 7th ~ 14 pin D0 ~ D7 are 8 bidirectional data lines, and the 15th pin is backlight positive pole; 16th pin is LED-OV.
Fig. 5 is the process flow diagram of the collecting method of another embodiment of the present invention.
As shown in Figure 5, the collecting method of another embodiment of the present invention comprises the steps:
Step S1, start also initialization.
Particularly, in this step, when user needs measurement data, starting up's data collector, and initialization raw data.
In step s 2, sensor measurement data.
Particularly, in the embodiment of the present invention, sensor adopts high precision diplopore cantilever balance beam strain gauge load cell, and measurand is placed in LOAD CELLS, starts to measure body weight, and the weight data got is sent to pre-filtering block 2.
In step s3, filtering.
Particularly, put filtration module 2 and receive the body weight information coming from sensor 1 and send, and pre-filtering is carried out to this simulating signal, and filtered simulating signal is sent to integrated amplification module 3.
In step s 4 which, amplify.
Particularly, integrated amplification module 3 receives the simulating signal coming from pre-filtering block and send, and is amplified by this signal, and the simulating signal after amplifying is sent to A/D modular converter 4.
In step s 5, A/D conversion.
Particularly, A/D modular converter 4 receives the simulating signal from integrated amplification module 3, and this simulating signal is converted into digital signal, and sends to main control module 5.
In step s 6, main control module process.
Particularly, main control module 5 receives the digital signal coming from A/D modular converter 4, carries out process reduction, and send to display module 6 to the digital signal received;
In the step s 7, show.
Particularly, display module 6 reception comes from the digital signal of main control module 5 and this digital signal is presented on display module.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (7)
1. a data collector, is characterized in that, described device comprises:
Sensor (1), is connected with pre-filtering block (2), for measuring measurand data message and sending to pre-filtering block (2);
Pre-filtering block (2), is connected with integrated amplification module (3), for sending to integrated amplification module (3) the simulating signal filtering measured;
Integrated amplification module (3), is connected with A/D modular converter (4), for simulating signal being amplified and sending to A/D modular converter (4);
A/D modular converter (4), is connected with main control module (5), for simulating signal being converted into digital signal and sending to main control module (5);
Main control module (5), is connected with display module (6), for the digital signal processing received and by process after digital signal send to display module (6);
Display module (6), for showing measurand data message;
Described main control module (5) comprise without low-power consumption standby pattern when measuring, have a measurement time the reset mode waken up in mode of operation, measuring process.
2. data collector according to claim 1, is characterized in that, the interference of described pre-filtering block (2) filtering random signal and noise fluctuations.
3. data collector according to claim 1, it is characterized in that, simulating signal after integrated amplification module (3) amplifies is converted into corresponding digital quantity by described A/D modular converter (4), and digital signal is sent to main control module (5).
4. data collector according to claim 1, is characterized in that, detects original state value when described main control module (5) comprises the free time.
5. data collector according to claim 1, is characterized in that, described main control module (5) is responsible for coordination data collecting work, comprises the open and close of sensor (1), Timing measurement and reset.
6. data collector according to claim 1, is characterized in that, described main control module (5) comprise measurement data is stored, filtering, check data and send the data to display module (6) display.
7. data collector according to claim 1, is characterized in that, described data collector adopts direct voltage source to power to sensor (1).
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|---|---|---|---|
| CN201520281869.8U CN204535739U (en) | 2015-05-05 | 2015-05-05 | A kind of data collector |
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| CN201520281869.8U CN204535739U (en) | 2015-05-05 | 2015-05-05 | A kind of data collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123940A (en) * | 2015-05-05 | 2016-11-16 | 北京康智乐思网络科技有限公司 | A kind of data acquisition unit and acquisition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106123940A (en) * | 2015-05-05 | 2016-11-16 | 北京康智乐思网络科技有限公司 | A kind of data acquisition unit and acquisition method |
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