CN1527061A - Intelligent frequency system with steel string sensor - Google Patents
Intelligent frequency system with steel string sensor Download PDFInfo
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- CN1527061A CN1527061A CNA031344976A CN03134497A CN1527061A CN 1527061 A CN1527061 A CN 1527061A CN A031344976 A CNA031344976 A CN A031344976A CN 03134497 A CN03134497 A CN 03134497A CN 1527061 A CN1527061 A CN 1527061A
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Abstract
The intelligent frequency system with steel string sensor has precise microcomputered frequency measuring an can calculate, display and print out corresponding physical quantities corresponding to the measured values. The present invention has reduced work strength of measuring string sensor output frequency and effectively raised measurement efficiency. The present invention includes hand-held frequency measuring instrument, which is connected via communication cable to computer and comprises monochip computer, excitation circuit and detection circuit, data memory, control keyboard and display screen connected to the monochip computer. The cured program inside the monochip computer includes measuring module, calculation module, polling module, up turning module, down turning module, forwards turning module, back turning module, display mode reset module and communication module.
Description
One, technical field:
The present invention relates to a kind of instrument system of survey frequency, especially relate to a kind of steel chord type sensor intelligent frequency measurement system.
Two, background technology:
Vibrating string type sensor is because of due to the manufacturing process, and its particular product performance parameters discreteness is very big, and each sensor all must be demarcated separately, and drawing one group is unique performance parameter (probability of repetition is extremely low) basically.This is a very thing of trouble to the user.Because in use, must distinguish each sensor and pairing measured value thereof, characterisitic parameter and its calibration formula of measured value substitution with each sensor calculates then, just can obtain required physical quantity; If institute's survey sensor is not a kind, then used formula is also different.Supposing has up to a hundred sensors on the building site, and so all the labour intensity of measuring is once well imagined.
At present, the surveying instrument (abbreviation frequency meter) that is used to measure the vibrating string type sensor output frequency be mostly can only survey frequency simple instrument.When measuring with this frequency meter, survey crew must be with pen band paper, writes down the measured value of each sensor at any time, and with measured value substitution calibration formula, hand computation goes out pairing physical quantity then, and is in use very inconvenient.
Three, summary of the invention:
The present invention is in order to solve the weak point in the above-mentioned background technology, a kind of steel chord type sensor intelligent frequency measurement system is provided, it adopts the micro computer frequency measurement, measurement result is accurate, can and show or the pairing Physical Quantity Calculation of each measured value with the report form printout, alleviate the working strength of measuring the vibrating string type sensor output frequency greatly, effectively improved surveying work efficient.
For achieving the above object, the technical solution used in the present invention is:
A kind of steel chord type sensor intelligent frequency measurement system, its special character is: comprise the hand-held frequency meter, the hand-held frequency meter is connected with computing machine by telecommunication cable.
Above-mentioned hand-held frequency meter comprises single-chip microcomputer, is connected to excitation chain and testing circuit on the single-chip microcomputer, and single-chip microcomputer also is connected with data-carrier store, supervisory keyboard and display screen respectively.
Above-mentioned single-chip microcomputer inside solidification program comprise measurement module, computing module, touring module, on turn over module, down turn over module, preceding turn over module, after turn over module, show mould dump block, communication module.
The job step of measurement module comprises in the above-mentioned single-chip microcomputer: 1. judge whether to measure, if do not have, then continue to judge whether spot measurement, if access measurement functions; If 2. sensor has signal, then store measured value, show measurement result; 3. if touring the measurement then exported i measurement point address, measure i dot frequency, store then and show.
The job step of computing module comprises in the above-mentioned single-chip microcomputer: 1. calculate and show physical quantity; 2. if pulling force, then the pulling force sign resets and shows; 3. if pressure, then the pressure sign shows; 4. return frequency shows.
The job step of touring module comprises in the above-mentioned single-chip microcomputer: 1. single-point zone bit negate; 2. if touring the measurement then shows touring survey mark; 3. touring demonstration the in the viewing area, wait key to be determined to press; 4. press and determine that key is definite.
The job step of communication module comprises in the above-mentioned single-chip microcomputer: 1. determine receiving sensor number N; 2. as receiving, send received signal, receive i sensor parameters and deposit memory in; 3. deposit the data in the memory in the i address; 4. ask next sensor parameters.5. 4. 2. step circulated N time to step.If 6. send, send the transmission signal, from memory, take out the measurement data of i sensor; 7. send measurement data; 8. 7. 6. step circulated N time to step.
Turn in the above-mentioned single-chip microcomputer with following job step of turning over module and comprise: judge whether it is first when turning over 1., judge whether it is last batch of when turning over down; 2. as all be not, batch subtract one when turning on then, batch add one when turning over down, then interrupt in this way returning; Show one batch data when turning over 3., show next batch data when turning over down.
Turn over before in the above-mentioned single-chip microcomputer with after turn over module job step comprise: judge whether it is first point when 1. before turning over, after judge whether it is last point when turning over; 2. as all be not, sequence number subtracts one when then before turning over, after when turning over sequence number add one, then interrupt in this way returning; The data that show previous sensor when 3. before turning over, after show the data of a back sensor when turning over.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
● measurement result is accurate.Adopt the micro computer frequency measurement, error is ± 1Hz.
● data are preserved permanent.Measurement result can long preservation (100 years).
● memory property is reliable.The erasable number of times of storer reaches 1,000,000 times.
● metering system is various.But the single-point manual measurement also can be selected the touring automatically measurement of 1～64 point (sensor) arbitrarily.
● memory data output is big.But continuous coverage and the measurement result of preserving 10 different times of 99 measurement points.
● measure convenient storage.The frequency of any sensor of duplicate measurements is at any time also preserved, and covers original result automatically.
● check that the result is convenient.Can arbitrarily check arbitrarily a bit, once measurement result arbitrarily.
● information shows comprehensively.Can be with screen display reminding character, measurement result, physical quantity, measurement batch, measure sequence number and sensor number.
● can remove memory content automatically.
● can show the pairing magnitude of physical quantity of each measurement result.
● measurement result can be sent to the PC computing machine.
● can send sensor parameters to frequency meter by the PC computing machine.
● utilize EXCEL software, can carry out data processing, analysis and various report output (chart, curve map, straight block diagram etc.) measurement result.
● can check the calculating parameter (model, K value, A value and frequently first) of each stored sensor.
● easy to use and reliable.Adopt the high quality thin film touch-switch, easy to operate, comfortable feel, dependable performance.
● the sound equipment aid prompting.Has the buzzing prompt tone.
● aesthetic in appearance generous.Adopt popular instrument look, show the elegance of fashion, elegance fully.
● the little power consumptive province of volume.Length is of a size of: 164 * 90 * 32mm.Static working current is 35mA only, and power consumption is about 175mW.
Four, description of drawings:
Fig. 1 is the outside drawing of frequency meter;
Fig. 2 is the top profile view of frequency meter;
Fig. 3 is the frequency measurement system chart;
Fig. 4 is a frequency measurement circuit system schematic diagram;
Fig. 5 is the main program module figure of frequency measurement system;
Fig. 6 is the communication module program flow diagram;
Fig. 7 is the measurement module program flow diagram;
Fig. 8 turns over the modular program process flow diagram before being;
Fig. 9 turns over the modular program process flow diagram after being;
Figure 10 is the display module program flow diagram;
Figure 11 is the dump block program flow diagram;
Figure 12 is the computing module program flow diagram;
Figure 13 is touring modular program process flow diagram;
Figure 14 turns over the modular program process flow diagram on being;
Figure 15 turns over the modular program process flow diagram under being;
Figure 16 is the PC program flow diagram;
Figure 17 is the start test pattern;
Figure 18 is the zero clearing surface chart that finishes;
Figure 19 is the normal surface chart of measuring.
Figure 20 is system interface figure.
Five, embodiment:
Mentality of designing of the present invention is: with single-chip microcomputer and peripheral circuit constitute the handheld-type intelligent frequency meter (with the key distinction of common frequency meter be to have storage, computational data and communication function), be solidified with the calibration formula of the physical quantity and the frequency of various sensors in the frequency meter; Establishment one sets of data is handled and communication software on the PC computing machine; During use, earlier the form in the characterisitic parameter of all the sensors that will the measure key entry PC data handling system, utilize the PC serial ports to import data into frequency meter then, at this moment, frequency meter just can be measured sensor, and with the direct substitution corresponding formulas of measured value, thereby calculate and show pairing physical quantity.If do not want on frequency meter, directly to read physical quantity, just do not need to import sensor parameters into frequency meter, but send the measurement data that stores in the frequency meter to PC, carry out data processing by PC, with the pairing Physical Quantity Calculation of each measured value and show or with the report form printout.
Measuring principle of the present invention: the measuring method of vibrating string type sensor mainly contains two kinds of relative method and direct-reading methods.Relative method is to utilize the standard signal of the standard frequency generator generation frequency adjustable in the metering circuit, during measurement, constantly adjust the standard signal frequency, by seeing lissajouf figure from oscillograph or utilizing earphone to listen resonant acoustic or see that from beat indicator mode criterion frequencies such as reometer nulling equate that with survey frequency then Ci Shi standard frequency is exactly a survey frequency.The direct-reading method is directly the frequency computation part of the sine voltage signal of sensor output to be come out by the frequency measurement instrument, shows by digital watch or analog meter then.Relative method is adopted in early stage measurement more, and generally all adopts the direct-reading method now.Vibrating string type sensor wants outputting oscillation signal at first must be energized (vibration).For this reason, utilize high-frequency transformer to produce high-voltage pulse excitation string wire and make it vibration.The string wire that is energized converts vibration to free damped sine-wave oscillation voltage signal by inductive coil and exports from sensor, and its duration generally is not more than 1 second.Testing circuit with this oscillator signal amplify, rectification and shaping become the burst signal that frequency is two times of original signals.The paired pulses string signal carries out frequency measurement two kinds of methods usually, and a kind of crying surveyed all methods, promptly measures two time T (repetition period) between the pulse, utilizes f=1/T to calculate frequency again; Another kind is the frequency measurement method, (such as 1 second) paired pulses string counting in the given time, and count results is exactly a burst frequencies.The frequency of operation of vibrating string type sensor is generally between 1kHz～5kHz, be suitable for low frequency measurement and survey all methods, so, native system adopts the frequency measurement method, producing accurate the measurement regularly with single-chip microcomputer interrupts, in 0.5 second, the train of impulses of testing circuit output is counted, calculated the signal frequency of sensor at last.In order to improve precision, in testing circuit, also added the one-level frequency multiplier circuit, the burst frequencies of giving single-chip microcomputer is doubled.
Native system mainly is made up of handheld-type intelligent frequency meter, telecommunication cable and PC computing machine.Referring to Fig. 1, this instrument comprises a plastic casing, battery, LCDs and a circuit board.Panel is provided with power switch 1, measures key 2, physical quantity key 3, touringly measure key 4, determine key 5, upturning key 6, preceding turn over key 7, after turn over that key 8, downturning key 9, duty show 10, the measurement point sequence number shows 11, measured value shows 12, measure batch show 13, sensor number shows 14,8 independent buttons on panel, also have three combination buttons:
● key+upturning key is turned on reset key=left side
● display key=upturning key+downturning key
● communication key=upturning key+determine key
Referring to Fig. 2, the panel top is provided with spot measurement cable socket 15, touring cable socket 16, the telecommunication cable socket 17 measured.
Referring to Fig. 3, comprise single-chip microcomputer, be connected to excitation chain and testing circuit on the single-chip microcomputer, excitation chain is connected with sensor with testing circuit, and single-chip microcomputer also is connected with data-carrier store, supervisory keyboard and display screen respectively, and single-chip microcomputer is connected with PC by telecommunication circuit.Its workflow is:
1. the input of sensor parameters: couple together with the serial ports of telecommunication cable with frequency meter and PC, the supervisory keyboard by frequency meter sends communication instruction, and single-chip microcomputer enters communications status; PC enters " data processing and communication system " software, receives sensor parameters that keyboard keys in and stores with document form; Click " transmission " button in " data processing and communication system ", import the parameter of sensor into frequency meter, frequency meter deposits data in storer, finishes the input function of sensor parameters.
2. the measurement of sensor frequency: will measure cable and receive on the sensor, press " measurement " key on the frequency meter, the Single-chip Controlling excitation chain produces high-voltage pulse with sensor string wire exciting, the vibration signal of string wire electric circuit inspection, amplification and shaping is after testing given single-chip microcomputer, single-chip microcomputer carries out frequency computation part and deposits frequency data in data-carrier store showing on display screen simultaneously to vibration signal, finishes measurement function.
3. the calculating of physical quantity and demonstration: " physical quantity " key of pressing frequency meter, single-chip microcomputer will be worked as the frequency measurement of front sensor and be solidificated in its inner parameter substitution corresponding calculated formula and be calculated physical quantity and send display screen to show, finish the physical quantity Presentation Function.
4. the transmission of data and processing: after frequency meter is finished measuring task, can make it enter communications status (with 1.), PC enters " data processing and communication system " software, click " reception " button in " data processing and communication system ", just the measurement data in the frequency meter (frequency values) can be sent to " data processing and the communication system " of PC, this system deposits the data that receive in corresponding file (just the 1. there is the file of sensor parameters in the step), then measurement data and sensor parameters substitution corresponding formulas are calculated physical quantity, and show with the form of form, simultaneously can curve plotting figure and by printer output, finish data processing function.
Referring to Fig. 4, comprise excitation chain and testing circuit, excitation chain is connected with sensor with testing circuit, in order to improve precision, has also added the one-level frequency multiplier circuit in testing circuit, and the burst frequencies of giving single-chip microcomputer is doubled.Testing circuit with oscillator signal amplify, rectification and shaping become the burst signal that frequency is two times of original signals.
Referring to Fig. 5, the single-chip microcomputer main program module comprise measurement module, computing module, touring module, on turn over module, down turn over module, preceding turn over module, after turn over module, show mould dump block, communication module.
Referring to Fig. 6, the program circuit of communication module comprises: 1. receiving sensor number N; 2. whether receive,, send out " N " and reply, receive i sensor parameters and deposit memory in as receiving; 3. deposit the data in the memory in the i address; 4. send out " N " and ask next sensor parameters.5. 4. 2. step circulated N time to step; If 6. send, send out " N " and reply, from memory, take out 10 measurement data of i sensor; 7. send 10 measurement data; 8. 7. 6. step circulated N time to step.
Referring to Fig. 7, the program circuit of measurement module comprises: 1. judge whether to measure, if do not have, then continue to judge whether spot measurement, if access measurement functions; If 2. sensor has signal, then store measured value, show measurement result; 3. press definite key; 4. remove this measured value, show the parameter of any down, survey mark resets; 5. if go the rounds to measure, i measurement point address exported in then clear viewing area, measures i dot frequency, stores then and shows.6. survey mark resets; 7. 5. 6. step to step circulates N time; 8. the spot measurement sign resets, cls.
Referring to Fig. 8, the preceding program circuit that turns over module comprises: 1. judge whether it is first point; 2. as be not, then sequence number subtracts one, then interrupts in this way returning; 3. the data that show previous sensor.
Participate in Fig. 9, after turn over module program circuit comprise: 1. judge whether it is first point; 2. as be not, then sequence number adds one, then interrupts in this way returning; 3. the data that show a back sensor.
Referring to Figure 10, the program circuit of display module comprises: 1. transfer explicit function to show tape, k, a, b successively; 2. recover former show state.
Referring to Figure 11, the program circuit of dump block comprises: 1. pilot lamp flicker and buzzing, wait key to be determined to press; 2. press definite key, transfer the clear memory of clear memory function.
Referring to Figure 12, the program circuit of computing module comprises: 1. calculate and show physical quantity; Whether is pulling force 2., if pulling force, then the pulling force sign resets and shows that QP represents pulling force; 3. if pressure, then pressure sign demonstration P; 4. return frequency shows.
Referring to Figure 13, the program circuit of touring module comprises: 1. single-point zone bit negate; 2. if touring the measurement then shows touring survey mark QT; 3. from 1 to 64 touring demonstration the in the viewing area, wait key to be determined to press; 4. press definite key, i is composed to N.
Referring to Figure 14, on turn over module program circuit comprise: 1. judge whether it is first; 2. as be not, then batch subtract one, then interrupt in this way returning; 3. show one batch data.
Referring to Figure 15, the program circuit that turns over module down comprises: 1. judge whether it is the tenth batch; 2. as be not, then batch add one, then interrupt in this way returning; 3. show next batch data.
Referring to Figure 16, the PC program module comprise set up file module, write the form module, data transmission blocks, data reception module, module logs off.
During actual the use, operate according to the following steps:
1. start
● load onto common No. 5 batteries of 4 joints, press power switch then, then can hear buzz, test pattern can occur on the screen, as Figure 17.At this moment, have only two keys to use, one is " measurement key ", and another is " reset key ".
● press " measurement key ", then enter normal measurement state, the measurement interface of screen display such as Figure 19.At this moment, except " reset key ", all the other keys are all available.
● if will then after start, press " reset key ", treat " Q " when flashing, press " determining key " and can carry out zero clearing the storer zero clearing.After zero clearing finished, screen display " QT " (Figure 18).At this moment, press " measurement key " and can enter normal measurement state.
2. spot measurement
● the spot measurement cable is inserted spot measurement cable socket 15.
● clamp two output lines of sensor to be measured respectively with two crocodile clips on the cable.
● press the power switch of frequency meter.This moment screen display such as Figure 17.
● can select the measurement point sequence number by left-right key, can select to measure batch by upper and lower key.
● selected measurement point sequence number and measure batch after, by measuring key.
● after about 1 second, demonstrate measurement result on the screen, prompt T flicker and with buzzer.
● press definite key, deposit this measurement result in, instrument enters the measurement state of next lattice measurement point automatically, and spot measurement finishes.
● if will remeasure certain point, available left-right key is chosen tested point and is remeasured, and former result is covered automatically by new result.
3. touring automatically the measurement
● will go the rounds to measure touring the measurement in the cable socket 16 of 9 pin D type plugs (hole head) insertion frequency meter of cable, the other end (syringe needle) of cable will be inserted in the socket of junction box correspondence.
● the plug of sensor to be measured is inserted respectively in the socket of junction box.
● press power switch.
● press Up/Down keys and select to measure batch.
● press touring key, measurement point sequence number from 1 to 64 circulation change automatically on the screen.
● when sequence number changes to counting of desire measurement, press definite key, sequence number stops to change.
● press the measurement key, instrument is measured the frequency of inserting those selected in junction box sensors automatically and is preserved, and after measuring, gets back to first point, and shows its result.
● determine to select when key selects measure dot number wrong if press, can be again get back to original state by touring key once.
4. clear memory
● press reset key, occur the Q prompt of flicker on the screen and with buzzer.
● press definite key, Q stops flicker, and buzzer also stops, and after about 6 seconds, prompt is got back to T, and clear operation finishes.
● if do not want to carry out clear operation again after pressing reset key, then not again by any key, Q got back to original state after glimmering about 10 seconds automatically, removed clear operation.
5. check measurement result
● turn over the measurement result that key can be checked some measurement points backward by the right side, turn over key by a left side and can check forward.Can check certain measurement result once by Up/Down keys.
6. check sensor parameters
● with a left side turn over, the right side turns over the selected sensor of key, presses display key (upturning key and downturning key simultaneously) then, occurs model code, K value, A value and the first frequency of this sensor on the screen successively.Each parameter shows about 3 seconds.Show the automatic return measurement state that finishes.
| Sensor model number | ??JXW | ??JXH | ??JXL | ??JXG | ??JXS | ??JXY |
| Code | ??101 | ??102 | ??103 | ??104 | ??105 | ??106 |
Such as, JXW type sensor, it is numbered 9054, the K value is 0.00003099, the A value is 225, just be 2326 frequently.After then pressing display key, show 101,309.9,225,2326 on the screen successively.Attention: the K value of demonstration is through the value after enlarging, and real value will multiply by 0.0000001.
7. the demonstration of magnitude of physical quantity
● with a left side turn over, the right side turns over the selected sensor of key, uses selected one batch of key and downturning key, should demonstrate measured value on the display screen this moment.Press the physical quantity key, the measured value on the display screen becomes the corresponding physical value, automatic return measurement value after about 5 seconds.
● but because not only measuring pressure but also can survey pulling force of the sensor that has, so when showing, represent pressure with P, QP represents pulling force.
8. communication
Data send:
● telecommunication cable is inserted " the serial ports socket " of computing machine and " the telecommunication cable socket " of frequency meter respectively.
● open computer power switch.
● operation on computers " steel chord type intelligence frequency meter data transmission system " software.
● with click " new files " button.
● in Microsoft Excel, key in the parameter of each sensor.
● play filename and deposit.
● close Microsoft Excel.
● in path and file selection box, select newly-built just now file.
● open the power switch of frequency meter.
● enter the measurement state by measuring key.
● by the communication key, have only character T to flash on the screen and with buzzer, this has just entered communications status.
● with click " data transmission " button.
● after several seconds, occur on the screen " sending successfully ".Simultaneously, frequency meter sends two very brief buzzings, and the return measurement state.Sign off.
● data send and finish.
Data Receiving:
● telecommunication cable is inserted " the serial ports socket " of computing machine and " the telecommunication cable socket " of frequency meter respectively.
● open computer power switch.
● move " data communication system " software on computers.
● open the file (data file of having only sensor parameters of deposit when data send) that desire receives data.
● confirm the sensor consistent with the sensor in the frequency meter (numbering is consistent) in the file.
● open the power switch of frequency meter.
● with click " Data Receiving " button.
● after several seconds, occur on the screen " receiving successfully ".
● simultaneously, " Data Receiving " key is changed into " writing form " key.
Write form:
● with the click button that " writes form ".The data that receive will write in the Microsoft Excel of opening automatically.Log off:
● with the click button that " logs off ".Data will be deposited automatically and be closed Microsoft Excel.
9. " steel chord type intelligence frequency meter data transmission system " operation instruction
This procedural application moves under windows98-2000, and running environment requires to install Microsoft EXCEL97 or Microsoft EXCEL 2000.
1. the installation of program
The mounting disc of this program is made up of two floppy disks (1,2).
Can directly move the setup.exe program on 1 dialer during installation, just can finish the installation of program then according to prompting.
2. the operation of program
Program can start in " beginning--program---data transmission system ".Also can be placed on the desktop and directly start.
Behind the program start, occur a system front cover interface earlier,, enter operation interface automatically after mouse is arbitrarily clicked as Figure 20.This interface by drive choice box, routing frame, file selection box, duty display box,
3 buttons are formed.
●
Be used for setting up a sensing data file (parameter that comprises N sensor) at the EXCEL table.After clicking this key, program provides a Microsoft Excel that has gauge outfit.The user can import " model " of each sensor in this table, " numbering ", " A value ", " K value " and " frequently just ".After input is finished, click " file---deposit " menu of Microsoft Excel, import file name deposit (can be named) according to the hobby of oneself, file is pressed the EXCEL file layout and is preserved, and closes Microsoft Excel then, presses
Button logs off.
●
Be used for the sensor parameters of input is sent to intelligent frequency meter.After in path and file selection box, choosing the filename (i.e. the file of importing in advance that has sensor parameters) that needs to send,
Button is changed into automatically
Press
Button carries out data and sends.
●
Be used to receive the measurement data and the computational physics amount of intelligent frequency meter.Before receiving data, must choose the filename that sends previously.After receiving,
Button is changed into automatically
Button.
●
Be used for the data that to receive, be saved in the EXCEL file.
●
Be used to withdraw from data transmission system and close EXCEL.
Annotate 1: after entering operation interface, the file that path block may show is incomplete, at this moment can double-click the drive " C: " in this frame, can show whole files.
Annotate 2: when data send and receive, please do not close Microsoft Excel.Want to withdraw from, must click
Button.
Annotate 3: transmission system operation interface and Microsoft Excel show with screen, click one of them interface, this interface can be put into the front and operate (also can pull) accordingly.
Annotate 4: correct during communication if cable connects, and system prompt inspection line can restart frequency meter (being equivalent to reset).
Annotate 5: this data transmission system is only finished the data transfer task between EXCEL file and intelligent frequency meter, all can carry out in EXCEL processing, analysis and the report output of data.That is to say, can break away from this system (not moving this system), in EXCEL, directly open the sensing data file, utilize the power of EXCEL that data are handled.
Annotate 6: mistake might appear preserving in the measured value first time after each start.After measuring for the first time, return and have a look, if mistake occurs, survey once gets final product again.
Claims (9)
1, a kind of steel chord type sensor intelligent frequency measurement system, it is characterized in that: comprise the hand-held frequency meter, the hand-held frequency meter is connected with computing machine by telecommunication cable.
2, steel chord type sensor intelligent frequency measurement according to claim 1 system, it is characterized in that: described hand-held frequency meter comprises single-chip microcomputer, be connected to excitation chain and testing circuit on the single-chip microcomputer, single-chip microcomputer also is connected with data-carrier store, supervisory keyboard and display screen respectively.
3, steel chord type sensor intelligent frequency measurement according to claim 2 system is characterized in that: described single-chip microcomputer inside solidification program comprise measurement module, computing module, touring module, on turn over module, down turn over module, preceding turn over module, after turn over module, show mould dump block, communication module.
4, the implementation method of a kind of steel chord type sensor intelligent frequency measurement system, it is characterized in that: comprise single-chip microcomputer, the job step of measurement module comprises in the described single-chip microcomputer: 1. judge whether to measure, if do not have, then continue to judge whether spot measurement, if access measurement functions; If 2. sensor has signal, then store measured value, show measurement result; 3. if touring the measurement then exported i measurement point address, measure i dot frequency, store then and show.
5, the implementation method of steel chord type sensor intelligent frequency measurement according to claim 4 system, it is characterized in that: the job step of computing module comprises in the described single-chip microcomputer: 1. calculate and show physical quantity; 2. if pulling force, then the pulling force sign resets and shows; 3. if pressure, then the pressure sign shows; 4. return frequency shows.
6, the implementation method of steel chord type sensor intelligent frequency measurement according to claim 5 system is characterized in that: the job step of touring module comprises in the described single-chip microcomputer: 1. single-point zone bit negate; 2. if touring the measurement then shows touring survey mark; 3. touring demonstration the in the viewing area, wait key to be determined to press; 4. press and determine that key is definite.
7, the implementation method of steel chord type sensor intelligent frequency measurement according to claim 6 system, it is characterized in that: the job step of communication module comprises in the described single-chip microcomputer: 1. determine receiving sensor number N; 2. as receiving, send received signal, receive i sensor parameters and deposit memory in; 3. deposit the data in the memory in the i address; 4. ask next sensor parameters.5. 4. 2. step circulated N time to step.If 6. send, send the transmission signal, from memory, take out the measurement data of i sensor; 7. send measurement data; 8. 7. 6. step circulated N time to step.
8, the implementation method of steel chord type sensor intelligent frequency measurement according to claim 7 system, it is characterized in that: the job step of turning over and turning over down module in the described single-chip microcomputer comprises: judge whether it is first when turning over 1., judge whether it is last batch of when turning over down; 2. as all be not, batch subtract one when turning on then, batch add one when turning over down, then interrupt in this way returning; Show one batch data when turning over 3., show next batch data when turning over down.
9, the implementation method of steel chord type sensor intelligent frequency measurement according to claim 8 system, it is characterized in that: turn over before in the described single-chip microcomputer with after turn over module job step comprise: judge whether it is first point when 1. before turning over, after judge whether it is last point when turning over; 2. as all be not, sequence number subtracts one when then before turning over, after when turning over sequence number add one, then interrupt in this way returning; The data that show previous sensor when 3. before turning over, after show the data of a back sensor when turning over.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571407B (en) * | 2009-06-19 | 2010-11-10 | 中国水利水电科学研究院 | Excitation method of vibrating wire sensor |
| CN104278984A (en) * | 2013-07-12 | 2015-01-14 | 中国石油化工股份有限公司 | Micrometric displacement indicator for beam pumper |
| CN105444946A (en) * | 2014-09-02 | 2016-03-30 | 佛山市顺德区美的电热电器制造有限公司 | Electric pressure cooker, and pressure detecting method and pressure detecting device used for same |
-
2003
- 2003-08-15 CN CN 03134497 patent/CN1258077C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571407B (en) * | 2009-06-19 | 2010-11-10 | 中国水利水电科学研究院 | Excitation method of vibrating wire sensor |
| CN104278984A (en) * | 2013-07-12 | 2015-01-14 | 中国石油化工股份有限公司 | Micrometric displacement indicator for beam pumper |
| CN104278984B (en) * | 2013-07-12 | 2017-02-08 | 中国石油化工股份有限公司 | Micrometric displacement indicator for beam pumper |
| CN105444946A (en) * | 2014-09-02 | 2016-03-30 | 佛山市顺德区美的电热电器制造有限公司 | Electric pressure cooker, and pressure detecting method and pressure detecting device used for same |
| CN105444946B (en) * | 2014-09-02 | 2020-06-19 | 佛山市顺德区美的电热电器制造有限公司 | Pressure detection method and pressure detection device for electric pressure cooker and electric pressure cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1258077C (en) | 2006-05-31 |
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