CN202329929U - On-line detection instrument for load sensor - Google Patents
On-line detection instrument for load sensor Download PDFInfo
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- CN202329929U CN202329929U CN2011204438252U CN201120443825U CN202329929U CN 202329929 U CN202329929 U CN 202329929U CN 2011204438252 U CN2011204438252 U CN 2011204438252U CN 201120443825 U CN201120443825 U CN 201120443825U CN 202329929 U CN202329929 U CN 202329929U
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Abstract
The utility model discloses an on-line detection instrument for a load sensor, which comprises a host, wherein the host wirelessly sends a test acquisition command and receives test data and a calculation result; the host which wirelessly sends a test acquisition command and receives test data is connected with a standard sensor; when the tested sensor is detected, the standard sensor and the tested sensor are simultaneously and vertically overlaid; and the standard sensor and the tested sensor are connected by a cable to carry out a synchronous indicator diagram test. The on-line detection instrument for a load sensor has a test function of the indicator diagram and the liquid level. The testing personnel are not afraid of sensor disassembly, calibration personnel and time expenditure can be greatly saved, unnecessary working intensity is lowered, the working efficiency is improved, and the on-line detection instrument for a load sensor is well received by oil field user friends.
Description
Technical field
The utility model relates to a kind of detector, specifically is a kind of load sensor on-line detector, belongs to the oil field remote monitor supervision area.
Background technology
At present; Relatively tradition, artificial individual well method of testing backward, inefficiency carried out the transition to digitizing remote monitoring, analysis, management gradually by the past in the merit figure test of each elephant rod-pumped well of China; Not only greatly improved testing efficiency; Reduce cost of labor, improved the security of test greatly, and the management of the science of being more convenient for.Yet; Along with progressively popularizing of digitizing oil field; Remote monitoring is used and is installed in the firm demand sensor on the individual well; Be installed in abovegroundly for a long time, experience the drench with rain influence of extraneous factors such as solarization, temperature in four seasons variation of wind for a long time, drift does not take place or causes sensor fault in parameters such as unavoidable sensor initial value, coefficient.Cause merit figure measuring accuracy to reduce greatly; Guaranteed not the accuracy of test data; Therefore the accuracy of present many digitizings oil field remote monitoring merit figure can't be assessed; Utilize such merit figure to carry out merit map analysis, diagnosis or merit figure gauging and calculate conclusion that is easy to make the mistake or result; Find that at Control Room many surveys do not go out merit figure or the abnormal well of merit figure in addition, many all thinking by mistake is that sensor damages, and arranges the tester to carry out load sensor to oil wells in field then and changes; Because wide, the road great distance of oilfield pumping well Regional Distribution, traffic environment are more abominable; Often being to hurry back and forth through one the tunnel to have changed the reproduction of pinpointing the problems after sensor is returned, still not publishing picture, is not sensor fault; The result hurries to each oil wells in field inspection other reasons again again; Carry out searching and safeguarding of other failure causes, not only wasted the time greatly, the man power and material, and reduced work efficiency.In the on-the-spot quality that just can judge load sensor of rod-pumped well, whether reach the measuring accuracy requirement, also do not have such pick-up unit can carry out on-the-spot test, check in the oil field at present.
If can develop the device whether a kind of sensor of fast detecting at the scene drifts about, whether whether on-the-spot determine sensor qualified, damage and some debugging functions, just can solve above-mentioned these conspicuous contradictions.
The utility model content
The purpose of the utility model is to be directed against the problems referred to above that the digitizing oil field exposes in the remote monitoring process; Specialized designs a kind of load sensor intelligent online detector; Solve digitizing oil field remote monitoring load sensor and exposed above-mentioned all problems; Through synchronism detection, contrast; On-the-spot contrast test merit figure, error and the analysis result that can demonstrate standard, tested load sensor provides the whether qualified conclusion of sensor to be detected, also has merit figure, liquid level test function simultaneously.
The technical scheme that adopts is:
A kind of load sensor intelligent online detector is characterized in that comprising:
The main frame of wireless transmission test acquisition instructions and acceptance test data, result of calculation;
Standard transducer with the main frame wireless connections;
Wherein, when detecting tested sensor, standard transducer and tested vertical being superimposed of sensor while, couple together standard transducer and tested sensor with cable, (seeing shown in Figure 1) carries out merit figure synchronism detection.The same gearshift mechanism in the standard transducer is all used in tested sensor, standard transducer displacement; The tester main frame sends test instruction to standard transducer; After being installed in master control borad in the standard transducer and receiving test instruction; Begin standard, tested sensor load, displacement are gathered simultaneously, the A/D conversion, calculated; Then calculating the wireless main frame of accomplishing that sends back to of standard, tested load and corresponding point displacement data; Main frame is accomplished the drafting of normal loading-displacement curve (merit figure), the drafting of tested load-displacement curve (merit figure), accomplish Error Calculation and demonstrate the contrast test result, and can carry out to data, merit figure, result store, playback and data upload.
Said standard transducer:
Standard transducer is a high column structure, is made up of upper and lower two parts, and the bottom is divided into the carrier compound assembly, and top is divided into the displacement mechanism assembly;
The carrier compound assembly comprises carrier compound, carrier compound upper cover plate and carrier compound lower cover, and the Connection Block of sensor to be detected is installed on the carrier compound upper cover plate, and response body is installed in the carrier compound, and foil gauge is installed on the response body;
Load part field of load requires greater than 150KN.
The displacement mechanism assembly comprises the displacement housing, antenna is installed, realizes wireless communication module, switch, light emitting diode lamp, charging socket and the signal input interface that is connected with tested sensor of wireless telecommunications with main frame in the displacement case top; The displacement enclosure interior is equipped with displacement mechanism, electric battery, main control board; The signal input interface that is connected with response body, wireless communication module, switch, light emitting diode lamp, charging socket and tested sensor is housed respectively on the main control board carries out the displacement line outlet of the socket and the displacement mechanism of corresponding connection through lead; Load response body and displacement housing connect into an one-piece construction through electrical fitting.
Main control board is after receiving the host computer test instruction, and the collection of completion standard, tested sensor load, displacement, calculating, storage, processing and a test load, shift value synchronous radio send back to the function of main frame;
The structural representation of displacement mechanism shown in Fig. 3-1 ,-2 signals of the schematic top plan view of displacement mechanism such as Fig. 3.It wherein is the displacement going barrel; In the wind spring clockwork spring is housed, an end of wind spring clockwork spring is fixed on the displacement going barrel outer wall, an other end is fixed in the central channel of rotation axis; An other end of rotation axis passes through bearing fixing on first gear; First gear carries out the no-load voltage ratio transmission through first pinion wheel and first gear, and first pinion wheel carries out coaxial the fixed connection with first gear through axle, and the first gear and second pinion wheel carry out the no-load voltage ratio transmission; Second pinion wheel is fixed on first that passes bearing, goes up coaxial ratchet and the line wheel of being fixed with for first, and the line wheel fixedly mounts through pad with screw; Ratchet can carry out stuck or unclamps control through ratchet, and ratchet is screwed through being with second of spring, and an other end of ratchet is equipped with guide wheel, and guide wheel is sleeved on the 3rd, is screwed, and guide wheel is installed in the catch; The displacement nylon wire is hereinafter to be referred as displacement line; On the fixing online outer arm of taking turns of one end, an other exit is guided through displacement box lead outlet through guide wheel; When pulling out the displacement nylon wire, guide wheel stress causes that ratchet is stressed, axially pulls out a direction along second and moves; An end that is installed in spring passes pawl extremity near line wheel place, and it is individual to pulling out the reciprocal tension force of line that ratchet is had, and ratchet blocks the contact position disengaging of ratchet simultaneously, and the assurance displacement line can freely be pulled out; Cause that line wheel rotates this moment, the line wheel rotates the chain transmission transmission that causes gear, causes that the wind spring clockwork spring tightens up in the displacement going barrel to entail much effort; When displacement line takes in; As long as on the displacement line tension force is arranged a little, the contact position of ratchet and ratchet still keeps disengaged position, and the wind spring clockwork spring has entailed much effort and tightened up during owing to backguy; This moment, displacement line can freely take in the line race, and the wind spring clockwork spring unclamps gradually in the simultaneous displacement going barrel; Be to rotate multiturn potentiometer,, be fixed with second largest gear on its turning axle hereinafter to be referred as potentiometer; Second largest gear transmits with first pinion wheel and is connected; And the final purpose that designs this displacement mechanism is: when displacement line was pulled out, potentiometer clockwise rotated, and potentiometer resistance increases; When displacement line took in, potentiometer rotated counterclockwise, and potentiometer resistance reduces; Pull out the mechanical drive that length causes to displacement line and just be based on, transform potentiometer resistance and change, thereby be converted into electric signal to displacement to measure with the master control borad collection; And the significance of design ratchet and ratchet is: when displacement line broke off suddenly, the wind spring clockwork spring can relax to free state moment, under the inertia effect of gear quick chain transmission of moment, is easy to damage potentiometer.In order to prevent the damage of potentiometer, specialized designs ratchet and ratchet are when displacement line breaks off suddenly; Tension force pop-off in the backguy; Cause the ratchet state that sets back, make the ratchet cleft hand block ratchet, the line wheel is stopped operating at once; Also stop the potentiometer turning axle that is fixed on the second largest gear to rotate at once, thereby protected potentiometer;
The current signal of load sensor output 4-20mA wherein to be detected (corresponding 0-150KN) will pass through I/V and convert A/D collection required voltage signal to, is input to 14 high-resolution multi-channel a/d converters then and carries out the A/D conversion.
The ultra-weak electronic signal of scale load, displacement transducer output at first will pass through amplifier and amplify, and imports the high-resolution multi-channel a/d converter that puts in place then simultaneously; Under the control of main control chip ARM7; Accomplish the synchronous acquisition work of high precision standard load, tested load, displacement; Send to main frame calculating scale load, tested load, the displacement data accomplished through wireless communication module then; Main frame is accomplished correlation data and is calculated,---displacement curve (standard merit figure), tested load---comparative analysis figure and the correlation data result of displacement curve (by measurement of power figure) that accomplish scale load synchronously;
Main frame: require to have liquid crystal display, keyboard input, power-supply system, through serial ports/usb data upload, functions such as wireless telecommunications, data storage, calendar clock, main control unit, liquid level, casing pressure processing; Wherein, Main frame display unit: utilize host CPU control, on LCD screen, realize all operations menu, data, curve, result's Presentation Function;
Keyboard processing unit: utilize the mouth line design determinant keyboard sweep circuit of host CPU to realize all row
Line need add and draw resistance;
The power supply processing unit: mainly being embodied as all IC chips of main frame provides needed rated voltage;
Serial ports USB the unit: be used for realizing that test data, result and host computer carry out communication and upload, can utilize serial communication interface or USB mouth to carry out, select according to user's actual needs;
Wireless communication module: main realization is carried out wireless telecommunications with standard transducer and is connected; Main frame sends test instruction through wireless communication module to standard transducer; And then load, the displacement data of acceptance criteria sensor and the collection of tested sensor synchronism detection, leave in the mainframe memory RAM;
Data storage cell: data storage cell comprises two parts; One is that interim store data is in order to calculate the random access memory ram that uses; Data Lock-out after system's power down; Another one is in order to the storage power down nonvolatile memory of obliterated data not, is used for preserving the data result after well-name, date and the calculating;
Calendar chip: to main frame calendar/clock is provided, adopts the serial bus interface of two line I2C;
CPU: the CPU in the core devices CPU of host circuit board and the standard transducer is the same; Be that the ARM7TDMI processor is the AT91SAM7X256 of core; It is based on a member in the Series of MCU of 32 ARM risc processors; Be integrated with the high speed Flash of 256K byte and the SRAM and a complete set of peripherals of 64K byte, it is minimum that a whole set of systemic-function unit makes the outer set number of packages that needs, and mainly accomplishes functions such as control, data acquisition, calculating, data processing.
The liquid level signal processing unit: the A/D collecting unit that the audio pulse of mainly microphone being imported carries out being input in the ARM master chip after filtering, amplification and the shaping is handled;
The casing pressure signal processing unit: the A/D collecting unit that mainly the cover pressure sensor electric signal that variation produces thereupon according to pressure is carried out being input in the ARM master chip after filtering, amplification and the shaping is handled;
Playback software: upload to computing machine to all detections, correlation data, comparing result, merit figure, liquid level in the main frame and carry out data analysis, diagnosis, realize and oilfield services device data transmission simultaneously, realize network management and data sharing;
The technical matters that solves:
In the long-range merit figure observation process in digitizing oil field; The precision of load sensor and whether have fault; At present the scene also can't be detected, diagnoses and demarcate, and adopts load sensor intelligent online detector, precision and quality that can on-the-spot detection load sensor; Can also demarcate the little sensor that drifts about, this instrument also has the test function of merit figure, liquid level simultaneously.
Technical solution:
The design of load sensor intelligent online detector mainly comprises two parts, the design of standard transducer and host design.Standard transducer comprises that mainly signal amplification, collection, disposal system and one of a high precision standard sensor by the I/V of school sensor conversion, signal acquiring processing system, carry out communication through the data after calculating through wireless communication module and main frame; Host design mainly comprises amplification, filtering, the shaping circuit of embedded-type ARM 7 high-speed CPU processor circuits, memory circuit, calendar chip, keyboard treatment circuit, liquid crystal display drive circuit, liquid level and box cupling, the passage that builds the pressure and the wireless communication module that carries out communication with standard transducer;
1) standard transducer
The stressed system of sensor that the Wheatstone bridge that is made up of the foil gauge of 8 high precision (0.1%) in the standard transducer is formed, load transducer is designed to upright post type and is embedded in about the carrier compound between the cover plate, load transducer strong shock resistance like this, it is little to drift about.Stick on foil gauge on the column elastic body that processes with silica gel special; Be contained in the column elastic body load transducer that posts foil gauge on the oil pumper poliched rod eye in the lower plate, thereby be the change transitions of polished rod load the elastomeric distortion of column, this deformation passes to foil gauge; And then cause the variation of foil gauge resistance value; Thereby it is uneven that bridge circuit is produced, and its uneven output is proportional to the pressure that the column elastic body is born, thereby produces the electric signal that changes corresponding to PRL; Thereby through measuring the imbalance output of bridge circuit, can the gaging pressure size.Load transducer is designed to the rectangular parallelepiped upright post type, and stress point is the plane, and load transducer is simple in structure like this, and size is little, integration.Therefore, sensor drift is little, good stability, and can bear the load (0～150KN) of great impact.
The differential signal of load transducer output 0～15mV; Amplify through instrument amplifier (AD620), the direct current signal of output 0～2.5V, displacement transducer also is the direct current signal that is designed to export 0～2.5V; Two paths of signals is through high-precision A/D conversion; Convert analog quantity to digital quantity, be conveyed into ARM7CPU again and handle, calculate, send to main frame to load, displacement result of calculation through wireless communication module again;
AD620 is a low price, and the high-precision meter amplifier can be provided with 1～1000 gain with high precision.The AD620 size is little, is convenient to use, and is low in energy consumption, and precision is high, has good DC performance (maximum input offset voltage 125uV, maximum input offset drift 1uV, maximum input bias current 20nA), low noise.
In order to guarantee the precision of standard transducer; A/D converter has adopted WV: the 2.7-5.5V low-power consumption, have 8 passages, have programmable-gain, the successive approximation type a/d converter ADS7871 of 48KSPS, 14 bit resolutions; This ADS7871 has the interior benchmark of sheet of high precision and high stability; The serial output mode, can with SPI, I
2Interface such as C, GPIO is directly compatible.
Because tested sensor output is the current signal of 4-20mA (0-150KN); The internal reference voltage of A/D converter is 2.5V, therefore at first need carry out the I/V conversion, converts positive voltage signal in order to guarantee tested sensor 4mA output; So that observation sensor zero point; Our custom-made I/V photoelectricity isolating converter ISO-A8-P1-08, have 0.1% conversion accuracy, 3-20mA electric current corresponding conversion direct current signal 0-2.5V output;
That the acp chip CPU of standard transducer adopts is AT91SAM7X256; It is based on a member in the Series of MCU of 32 ARMRISC processors; Be integrated with the high speed Flash of 256K byte and the SRAM and a complete set of peripherals of 64K byte, it is minimum that a whole set of systemic-function unit makes the outer set number of packages that needs.The Flash storer can also can preferentially be programmed to it via parallel interface through the product programmer via programming in the JTAG-ICE interface system in the sheet.Built-in locking bit and security bit can protect firmware to prevent it was covered and can keep its content by mistake confidentiality.The AT91SAM7X256 system controller has comprised the reset controller of the electrifying timing sequence of a supervisor micro controller and total system.The operation meeting of relevant device is the WatchDog Timer monitoring record in clock source by built-in detection of power loss device and one with the integrated RC oscillator.AT91SAM7X256 is integrated ARM7TDMI processor on chip piece; Flash and SRAM in the sheet; And a series of peripherals that comprise USART, SPI, CAN controller, Ethernet network interface, timer/counter, RTT and analog to digital converter, can well use the scheme flexible, cost optimization that provides for a lot of embedded Control.
The standard transducer battery adopts the Ni-MH battery group power supply of 5 joint 2.4AH, and WV requires to be higher than 6V, and stream time was greater than 6 hours;
Tested sensor interface, charging inlet, power light, power switch and antenna assembly are housed on the standard transducer shell;
2) main frame
Main frame mainly sends test instruction to sensor; Contrast merit figure and comparing result are drawn out in completion standard, the time test by the school sensor, and receiving sensor test data simultaneously simultaneously on main frame; According to the host setting error, determine the whether qualified result of tested sensor.Main frame mainly has the error set-up function, detects comparing function, on-the-spot debugging functions, merit figure and liquid level test function, storage and communication function.
CPU in the core devices CPU of host circuit board and the standard transducer is the same; Also be that the ARM7TDMI processor is the AT91SAM7X256 of core; Done introduction above the characteristic; Main data acquisition, calculating, the processing capacity accomplished also has power module, signal amplification, filtering, A/D change-over circuit, memory circuitry, keyboard processing module, liquid crystal display circuit, wireless communication module in addition in the main frame.
The CPU processor: ARM (AT91SAM7SE256) chip that adopts atmel corp is as CPU.
Power unit: power supply 3.3V adopts the TPS7333 of LDO to realize;
Power supply 24V is realized that by WRB0524MP-3W the power supply of input end is controlled by the G5-1V relay;
The liquid level signal amplifying circuit: the liquid level signal that transmits from microphone divides box cupling, two passages of liquid level to handle, and they amplify through the two poles of the earth.What front end used all is the CA3140 operational amplifier of high input impedance; Employing OP07 chip is amplified in the second level; With the 1st grade of enlargement factor that the CD4051 analog switch is regulated passage, the second level is controlled with 100K digital regulation resistance X9313T, and wave filter selects for use TCL14CP to carry out filtering.
LCD backlight drives: adopt the TPS2013 power switch to control.
Serial port and USB communication port:
Adopt the SP3223 chip to carry out level conversion with the serial communication and the serial debugging of computing machine, or directly carry out a mouthful USB communication through driving with ARM7 chip USB.
The touch keyboard control circuit:
Adopt 3 row, 6 row determinant keyboards, column rule, alignment are all used the mouth line of ARM7.
Memory circuit:
Program and test result data are stored in the AT45DB161D chip, and it is the Flash storer of a 16M bit serial line interface, and there are 4096 sectors inside, every sector 528 bytes.Ephemeral data is stored in the inner 64K static memory.
Standard transducer and mainframe program all adopt the C51 programming to accomplish;
Main frame has liquid level, builds the pressure, communication and charging inlet, and keyboard is the touch keyboard operation, and is not only easy to operate, can also effectively prevent dust, sand prevention.
Beneficial effect:
Load sensor intelligent online detector ", be equivalent to take the scene to a calibration check system, only need with standard transducer be added to and carried out merit figure test on the sensor of school, just can on-site proving by the precision of school sensor and quality; Can demarcate the little sensor that drifts about; The test function that has merit figure, liquid level simultaneously; Can save the fearless sensor dismounting of tester and personnel that demarcate and time spending greatly, reduce unnecessary working strength, improve work efficiency, receive oil field user friends' welcome deeply.
Description of drawings:
Fig. 1 is the main frame that provides of the utility model one embodiment and the synoptic diagram that is connected of standard transducer.
Fig. 2 is the inner synoptic diagram that connects of main frame that the utility model one embodiment provides.
Fig. 3 is the standard transducer inner structure synoptic diagram that the utility model one embodiment provides.
Fig. 4 is the displacement mechanism enlarged diagram.
Fig. 5 is that Fig. 3 (9) displacement mechanism is overlooked enlarged diagram.
Fig. 6 is that the inner master control borad of standard transducer that the utility model one embodiment provides is electrically connected synoptic diagram.
Fig. 7 is the on-the-spot installation testing synoptic diagram that the utility model one embodiment provides.
Embodiment:
A kind of load sensor intelligent online detector is characterized in that comprising:
The main frame of wireless transmission test acquisition instructions and acceptance test data, result of calculation;
Standard transducer with the main frame wireless connections;
Wherein, when detecting tested sensor, standard transducer and tested vertical being superimposed of sensor while, couple together standard transducer and tested sensor with cable, (seeing shown in Figure 1) carries out merit figure synchronism detection.The same gearshift mechanism in the standard transducer is all used in tested sensor, standard transducer displacement; The tester main frame sends test instruction to standard transducer; After being installed in master control borad in the standard transducer and receiving test instruction; Begin standard, tested sensor load, displacement are gathered simultaneously, the A/D conversion, calculated; Then calculating the wireless main frame of accomplishing that sends back to of standard, tested load and corresponding point displacement data; Main frame is accomplished the drafting of normal loading-displacement curve (merit figure), the drafting of tested load-displacement curve (merit figure), accomplish Error Calculation and demonstrate the contrast test result, and can carry out to data, merit figure, result store, playback and data upload.
Said standard transducer:
Standard transducer is a high column structure, is made up of upper and lower two parts, and the bottom is divided into the carrier compound assembly, and top is divided into the displacement mechanism assembly;
The carrier compound assembly comprises carrier compound 3, carrier compound upper cover plate 2 and carrier compound lower cover 4, and the Connection Block 1 of sensor to be detected is installed on the carrier compound upper cover plate 2, and response body 5 is installed in the carrier compound 3, on the response body 5 foil gauge is installed;
Load part field of load requires greater than 150KN.
The displacement mechanism assembly; Comprise displacement housing 10, antenna 11 is installed, realizes wireless communication module 16, switch 13, light emitting diode lamp 15, charging socket 14 and the signal input interface 12 that is connected with tested sensor of wireless telecommunications with main frame in the displacement case top; Displacement housing 10 inside are equipped with displacement mechanism 9, electric battery 8, main control board 7; The signal input interface 12 that is connected with response body 5, wireless communication module 16, switch 13, light emitting diode lamp 15, charging socket 14 and tested sensor is housed respectively on the main control board 7 carries out displacement line 32 outlets of the socket and the displacement mechanism of corresponding connection through lead; Load response body 5 connects into an one-piece construction with displacement housing 10 through electrical fitting 6.
Main control board 7 is after receiving the host computer test instruction, and the collection of completion standard, tested sensor load, displacement, calculating, storage, processing and a test load, shift value synchronous radio send back to the function of main frame;
The structural representation of displacement mechanism 9 shown in Fig. 3-1 ,-2 signals of the schematic top plan view of displacement mechanism 9 such as Fig. 3.Wherein 18 is displacement going barrels; In the wind spring clockwork spring is housed, an end of wind spring clockwork spring is fixed on the displacement going barrel outer wall, an other end is fixed in the central channel of rotation axis 17; An other end of rotation axis 17 is fixed on first gear 19 through bearing 36; First gear 19 carries out the no-load voltage ratio transmission through first pinion wheel 20 with first gear 33, and first pinion wheel 20 carries out coaxial the fixed connection with first gear 33 through axle 21, and the first gear 33 and second pinion wheel 34 carry out the no-load voltage ratio transmission; Second pinion wheel 34 is fixed on first 30 that passes bearing, coaxial ratchet 31 and the line wheel 29 of being fixed with on first 30, and line wheel 29 usefulness screws fixedly mount through pad 28; Ratchet 31 can carry out stuck or unclamps control through ratchet 25; Ratchet 25 is screwed through being with second 27 of spring 26, and an other end of ratchet 25 is equipped with guide wheel 23, and guide wheel 23 is sleeved on the 3rd 24; Be screwed, guide wheel 23 is installed in the catch 22; The displacement nylon wire is hereinafter to be referred as displacement line 32; Fixing online the wheel on 29 the outer arm of one end, an other exit is guided through displacement box lead outlet through guide wheel 23; When pulling out the displacement nylon wire, guide wheel 23 is stressed, causes that ratchet 25 is stressed, moves to pulling out a direction along second 27; An end that is installed in spring 26 passes ratchet 25 ends and takes turns 29 places near line, and it is individual to pulling out the reciprocal tension force of line that ratchet is had, and ratchet 25 blocks the contact position disengaging of ratchet 31 simultaneously, and the assurance displacement line can freely be pulled out; Cause that line wheel 29 rotates this moment, line wheel 29 rotates the chain transmission transmission that causes gear 34,33,20,19, causes that the wind spring clockwork springs tighten up in the displacement going barrel 18 to entail much effort; When displacement line takes in; As long as on the displacement line tension force is arranged a little; Ratchet 25 still keeps disengaged position with the contact position of ratchet 31; Because the wind spring clockwork spring has entailed much effort and tightened up during backguy, displacement line can freely take in around line and take turns in 29 grooves this moment, and the wind spring clockwork spring unclamps gradually in the simultaneous displacement going barrel 18; The 37th, rotate multiturn potentiometer; Hereinafter to be referred as potentiometer; Be fixed with second largest gear 35 on its turning axle, second largest gear 35 transmits with first pinion wheel 20 and is connected, and the final purpose that designs this displacement mechanism is: when displacement line is pulled out; Potentiometer clockwise rotates, and potentiometer resistance increases; When displacement line took in, potentiometer rotated counterclockwise, and potentiometer resistance reduces; Pull out the mechanical drive that length causes to displacement line and just be based on, transform potentiometer resistance and change, thereby be converted into electric signal to displacement to measure with the master control borad collection; And the significance of design ratchet 25 and ratchet 31 is: when displacement line broke off suddenly, the wind spring clockwork spring can relax to free state moment, under the inertia effect of gear quick chain transmission of moment, is easy to damage potentiometer.In order to prevent the damage of potentiometer, specialized designs ratchet 25 and ratchet 31 are when displacement line breaks off suddenly; Tension force pop-off in the backguy; Cause ratchet 25 state that sets back, make ratchet 25 cleft hands block ratchet 31, the line wheel is stopped operating at once; Also stop the potentiometer turning axle that is fixed on the second largest gear 35 to rotate at once, thereby protected potentiometer 37;
The current signal of load sensor output 4-20mA wherein to be detected (corresponding 0-150KN) will pass through I/V and convert A/D collection required voltage signal to, is input to 14 high-resolution multi-channel a/d converters then and carries out the A/D conversion.
The ultra-weak electronic signal of scale load, displacement transducer output at first will pass through amplifier and amplify, and is input to 14 high-resolution multi-channel a/d converters then simultaneously; Under the control of main control chip ARM7; Accomplish the synchronous acquisition work of high precision standard load, tested load, displacement; Send to main frame calculating scale load, tested load, the displacement data accomplished through wireless communication module then; Main frame is accomplished correlation data and is calculated,---displacement curve (standard merit figure), tested load---comparative analysis figure and the correlation data result of displacement curve (by measurement of power figure) that accomplish scale load synchronously;
Main frame: require to have liquid crystal display, keyboard input, power-supply system, through serial ports/usb data upload, functions such as wireless telecommunications, data storage, calendar clock, main control unit, liquid level, casing pressure processing; Wherein, Main frame display unit: utilize host CPU control, on LCD screen, realize all operations menu, data, curve, result's Presentation Function;
Keyboard processing unit: utilize the mouth line design determinant keyboard sweep circuit of host CPU to realize that all column rules need add and draw resistance;
The power supply processing unit: mainly being embodied as all IC chips of main frame provides needed rated voltage;
Serial ports USB the unit: be used for realizing that test data, result and host computer carry out communication and upload, can utilize serial communication interface or USB mouth to carry out, select according to user's actual needs;
Wireless communication module: main realization is carried out wireless telecommunications with standard transducer and is connected; Main frame sends test instruction through wireless communication module to standard transducer; And then load, the displacement data of acceptance criteria sensor and the collection of tested sensor synchronism detection, leave in the mainframe memory RAM;
Data storage cell: data storage cell comprises two parts; One is that interim store data is in order to calculate the random access memory ram that uses; Data Lock-out after system's power down; Another one is in order to the storage power down nonvolatile memory of obliterated data not, is used for preserving the data result after well-name, date and the calculating;
Calendar chip: to main frame calendar/clock is provided, adopts the serial bus interface of two line I2C;
CPU: the CPU in the core devices CPU of host circuit board and the standard transducer is the same; Be that the ARM7TDMI processor is the AT91SAM7X256 of core; It is based on a member in the Series of MCU of 32 ARM risc processors, is integrated with the high speed Flash of 256K byte and the SRAM and a complete set of peripherals of 64K byte, and it is minimum that a whole set of systemic-function unit makes the outer set number of packages that needs; The main functions such as control, data acquisition, calculating, data processing of accomplishing
The liquid level signal processing unit: the A/D collecting unit that the audio pulse of mainly microphone being imported carries out being input in the ARM master chip after filtering, amplification and the shaping is handled;
The casing pressure signal processing unit: the A/D collecting unit that mainly the cover pressure sensor electric signal that variation produces thereupon according to pressure is carried out being input in the ARM master chip after filtering, amplification and the shaping is handled;
Playback software: upload to computing machine to all detections, correlation data, comparing result, merit figure, liquid level in the main frame and carry out data analysis, diagnosis, realize and oilfield services device data transmission simultaneously, realize network management and data sharing.
Claims (5)
1. load sensor on-line detector; Comprise the main frame of a wireless transmission test acquisition instructions and acceptance test data, result of calculation, it is characterized in that: the main frame of wireless transmission test acquisition instructions and acceptance test data is connected with standard transducer through wireless communication mode; Wherein, when detecting tested sensor,, couple together standard transducer and tested sensor, carry out merit figure synchronism detection with cable standard transducer and tested vertical being superimposed of sensor while.
2. a kind of load sensor on-line detector according to claim 1 is characterized in that said standard transducer is a high column structure, is made up of upper and lower two parts, and the bottom is divided into the carrier compound assembly, and top is divided into the displacement mechanism assembly;
The carrier compound assembly; Comprise carrier compound (3), carrier compound upper cover plate (2) and carrier compound lower cover (4); The Connection Block (1) of sensor to be detected is installed on the carrier compound upper cover plate (2), response body (5) is installed in the carrier compound (3), response body is equipped with foil gauge on (5);
The displacement mechanism assembly; Comprise displacement housing (10), antenna (11) is installed, realizes wireless communication module (16), switch (13), light emitting diode lamp (15), the charging socket (14) of wireless telecommunications and the signal input interface (12) that is connected with tested sensor with main frame in the displacement case top; Displacement housing (10) inside is equipped with displacement mechanism (9), electric battery (8), main control board (7); The signal input interface (12) that is connected with tested sensor with response body (5), wireless communication module (16), switch (13), light emitting diode lamp (15), charging socket (14) is housed respectively on the main control board (7) carries out the socket of corresponding connection and the displacement line of displacement mechanism (32) outlet through lead; Load response body (5) connects into an one-piece construction with displacement housing (10) through electrical fitting (6).
3. a kind of load sensor on-line detector according to claim 2; It is characterized in that said displacement mechanism (9) comprises a displacement going barrel (18); The displacement going barrel is equipped with the wind spring clockwork spring in (18); One end of wind spring clockwork spring is fixed on the displacement going barrel outer wall; An other end is fixed in the central channel of rotation axis (17), and an other end of rotation axis (17) is fixed on first gear (19) through bearing (36), and first gear (19) carries out the no-load voltage ratio transmission through first pinion wheel (20) and first gear (33); First pinion wheel (20) carries out coaxial the fixed connection with first gear (33) through axle (21), and first gear (33) carries out the no-load voltage ratio transmission with second pinion wheel (34); Second pinion wheel (34) is fixed on first (30) passing bearing, and coaxial ratchet (31) and the line wheel (29) of being fixed with gone up in first (30), and line wheel (29) fixedly mounts through pad (28) with screw; Ratchet (31) can carry out stuck or unclamps control through ratchet (25); Ratchet (25) is screwed through second (27) that are with spring (26); An other end of ratchet (25) is equipped with guide wheel (23); Guide wheel (23) is sleeved on the 3rd (24), is screwed, and guide wheel (23) is installed in the catch (22); On the outer arm of fixing online wheel the (29) of displacement line (32) one ends, an other exit is guided through displacement going barrel lead outlet through guide wheel (23); Be fixed with second largest gear (35) on the turning axle of potentiometer (37), second largest gear (35) transmits with second pinion wheel (20) and is connected.
4. a kind of load sensor on-line detector according to claim 2; It is characterized in that load sensor to be detected is connected through the input dedicated port of cable with standard transducer upper shell top; The current signal of load sensor output 4-20mA to be detected; Convert A/D to through I/V and gather the required voltage signal, be input to 14 high-resolution multi-channel a/d converters then.
5. a kind of load sensor on-line detector according to claim 4 is characterized in that said master control borad:
CPU in its core devices CPU and the standard transducer is the same, is that the ARM7TDMI processor is the AT91SAM7X256 of core;
The I/V converterBe photoelectricity isolating converter ISO-A8-P1-O8;
A/D converter doesADS7871.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204438252U CN202329929U (en) | 2011-11-11 | 2011-11-11 | On-line detection instrument for load sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204438252U CN202329929U (en) | 2011-11-11 | 2011-11-11 | On-line detection instrument for load sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329929U true CN202329929U (en) | 2012-07-11 |
Family
ID=46441907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204438252U Withdrawn - After Issue CN202329929U (en) | 2011-11-11 | 2011-11-11 | On-line detection instrument for load sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329929U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105265A (en) * | 2011-11-11 | 2013-05-15 | 沈阳金凯瑞科技有限公司 | On-line monitor for strain gauge load cell |
| CN107328520A (en) * | 2017-07-11 | 2017-11-07 | 北京恒兴利达仪器有限公司 | The automated calibration system and method for a kind of wireless work(figure test terminal |
-
2011
- 2011-11-11 CN CN2011204438252U patent/CN202329929U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105265A (en) * | 2011-11-11 | 2013-05-15 | 沈阳金凯瑞科技有限公司 | On-line monitor for strain gauge load cell |
| CN103105265B (en) * | 2011-11-11 | 2015-04-29 | 沈阳金凯瑞科技有限公司 | On-line monitor for strain gauge load cell |
| CN107328520A (en) * | 2017-07-11 | 2017-11-07 | 北京恒兴利达仪器有限公司 | The automated calibration system and method for a kind of wireless work(figure test terminal |
| CN107328520B (en) * | 2017-07-11 | 2023-10-20 | 西安海诚石油科技有限公司 | Automatic calibration system and method for wireless indicator diagram test terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20150429 |