CN2177803Y - Automatic digital recorder for pressure at micro-borehole - Google Patents

Abstract

The utility model relates to an unmanned operation novel practical high-accuracy pressure measurement recording arrangement. One machine can be used as two, and two different pressure parameters can be measured and printed and recorded at the same time. Because advanced monolithic computer technology is used, and opening and closing the machine can be timed according to the users' requirement, the utility model has the advantages of automatic measurement and record, small energy consumption, low price, stable operation, high measuring precision and little error, and is provided with water proof, corrosion proof and theft proof measures. The utility model is an ideal digital recording instrument used for realizing unmanned operation, automatic measurement of oil pressure and sleeve pressure in oil and gas fields.

Description

Automatic digital recorder for pressure at micro-borehole

The utility model relates to a kind of miniature automatic digital recorder of two pressure, particularly a kind of oil, gas field pressure unmanned, on-the-spot self-recording unit.

Oil well, gas well during oil, air to open are sent out nearly all is distributed in sparsely populated, short of electricity, ungetable mountain area, wilderness.In order to write down pressure parameter, recover the oil, gasworker will cross mountains and rivers record every day, because of all adopting the pressure meter of general expression during oily, air to open is sent out at present, it can only indicate current pressure, and record more can not be made digital record automatically.Some units develop fuel-displaced, atmospheric pressure measurement mechanism at present, but all there is such or such deficiency, for example, the digital pressure instrument that Ministry of Aviation 304 is developed, what use is 220 volts of alternating currents, the maximum pressure of measuring has only 20MPa, can not satisfy the oil well of in short supply electricity, the production requirement of gas well surveying record pressure; The digital display manometer of machine tool institute, Ministry of Machine-building and Electronics Industry Guangzhou development can only be made numeral and show, can not carry out digital record; The 2PC-881 type electronic pressure gauge of Chengdu Inst. of Metrology ﹠ Servey's development can not carry out pressure record automatically, needs skilled engineers and technicians and workman's co-operating, just can finish the record of pressure parameter.

The purpose of this utility model is to provide a kind of employing pure direct current supply, adapts under the open-air open-air unserviced condition, automatic, two pressure on the number of a print record of timing (high-precision pressure digital recorder of 0～40MPa) parameter.

Above-mentioned purpose of the present utility model is to realize by such structure, be that the utility model mainly is made of main frame, power supply box two parts, wherein main frame places sealing shroud interior by cover plate for sealing, and dry cell inserts main frame by lead-in wire it is powered through waterproofing work in the power supply box; Described main frame comprises measures oil or air pressure, sensor that the casing pressure twice are identical and amplifier, the breadboardin switch, A/D converter, single-chip microcomputer, timing switch circuit, printer, power supply is regularly opened or turn-offed to timing switch circuit, sensor is converted to pressure the signal of telecommunication of respective change, by delivering to analog switch after the amplifier circuit amplification, the Single-chip Controlling analog switch carries out acquisition time with the signal of amplifier and sends into A/D converter and carry out the A/D conversion, send into single-chip microcomputer by data/address bus and carry out the data processing, calculate the force value of respective channel, go out force value by the Single-chip Controlling printer prints at last.

Said structure of the present utility model can further specify by the example that accompanying drawing provides.

The utility model has following accompanying drawing:

Accompanying drawing 1,2 cuts open figure and sectional side view for structure master of the present utility model;

Accompanying drawing 3 is a schematic block circuit diagram of the present utility model;

Accompanying drawing 4 is a circuit diagram of the present utility model.

Referring to Fig. 1,2, the utility model comprises main frame 1 and power supply box 2 two parts.The main frame outside is a sealed outer cylinder 3, and inside is made up of parts such as circuit board 4, sensor CG, timer DS, printer 7 and power packs 8.Except that sensor was installed on the back shroud 9, remaining part was installed on panel 10 and the fixed head 11, forms whole internal organ by mechanical connection, places in the sealed outer cylinder, tightens cover plate 12, made circuit part obtain the protection of sealed cylinder, guaranteed safety work automatically.Dry cell inserts main frame by lead-in wire it is powered through waterproofing work in the power supply box.Described structure of the present utility model can place in the little instrument shelter that can shut, and can reach rainproof and antitheft purpose.

Referring to Fig. 3 schematic block circuit diagram, the process that this instrument writes down pressure on the number automatically is achieved in that timing switch circuit 5 is devices of regularly opening with power cutoff, the available machine time of timer is once setting, regularly opening power to full machine each several part power supply, makes machine enter duty, at this moment, the pressure that sensor CG will experience separately converts corresponding analog electrical signal to, delivers to corresponding amplifier respectively and amplifies, again through variable connector 5IC ₁Deliver to A/D converter 5IC ₂Single-chip microcomputer 5IC ₈Carry out work by intrinsic program, control variable connector and A/D converter carry out acquisition time.The data of being gathered, again under the control of single-chip microcomputer, send into single-chip microcomputer by data/address bus and carry out the data processing, calculate the force value of each passage correspondence, last under the control of single-chip microcomputer, directly print the pressure on the number (MPa) of current each road correspondence by printer, timer is timely breaking circuit just, makes machine be in dormant state.Timer is continual to carry out timing, when arriving setting-up time, again complete dynamo-electric source is opened, make full machine enter duty again, repeat the above-mentioned course of work, enter dormant state again ... all and reciprocal, Automatic Cycle realizes unattendedly, writes down pressure on the number automatically.Each working time of this machine has only one minute, if write down twice every day, each stop time was 12 hours, and the ratio of stop time and working time is greatly to 720 times, and energy consumption and service life of a machine are very good.

In conjunction with Fig. 4 the utility model each several part circuit working principle is further described:

Timing switch circuit is made up of timer DC, delay circuit, electronic switch three parts.Timer has clocking capability, and can regularly send starting-up signal by user's requirement, can select for use the senior liquid crystal digital display of RD-01 to show alarm clock or with frequency dividing circuit design construction voluntarily.Delay circuit 2IC ₁Adopt 7556 plesichronous circuit and outer member to be formed by connecting, first order delay time t1=11(2R2) (2C3) for preventing the electronic switch misoperation, should select 2R2 and 2C3, guarantee t1 sends signal greater than timer duration, second level delay time t2=11(2R3) (2C4), it is the time that localpower is switched to shutoff (promptly working).Select 2R3,2C4 parameter, guarantee full machine operate as normal and make power consumption minimum.Electronic switch is made up of 2Q1 and J1, and 2Q1 selects 3DG12B for use, and J1 can select the JRC-5M-6V sealed relay for use, its constant open contact J _1-1, J _1-2Be serially connected in the power circuit.When needing machine works, timer sends a succession of undersuing (starting-up signal) and passes through 2C1,2C2 is added to 6 pin of 2IC1, make 5 pin rise to high level by low level, at this moment supply voltage passes through 2R2,2C3 is to 1, the charging of 2 pin, when 1, when 2 pin current potentials arrive 2/3 supply voltage VDD, timer has stopped sending negative pulse, 5 pin jump to low level by high level suddenly, make 8 pin obtain a negative signal by 2C5 and trigger, at this moment, 9 pin rise to high level by low level, triode 2Q1 becomes conducting by ending, J1 work, and complete dynamo-electric source is just connected automatically, supply voltage passes through 2R3 subsequently, 2C4 is to 12(13) the pin charging, when arriving 2/3VDD, 9 pin just revert to low level by high level, and 2Q1 ends, J1 quits work, and complete dynamo-electric source just automatically shuts down.2D1 plays clamping action to undersuing among the figure, make the delay circuit operate as normal, 2D3 is provided with for eliminating the harm that induced potential that relay produces brings, and 2R7 and 2C6 play the decoupling filter action, and K manually prints starting switch, when needing the force of impression numeral, as long as this knob is pressed, complete dynamo-electric source demand working, the machine each several part is worked automatically, after printing is finished, the electronic switch automatically cutting off power source.

The record oil pressure, two road sensors of casing pressure are all identical with amplifier circuit, sensor is selected the ACY5-7 pressure sensor for use, be installed on the bonnet of main frame urceolus, receive on the circuit main board by lead-in wire, plug CP31,2 pin are added with 6V voltage, CP33,4 pin have the voltage output that is directly proportional with pressure, be added to the 3IC1 input, 3IC1 adopts 7650 chopper-zero-stabilized devices, is designed to inverting amplifier, to reduce drift, the output signal of 3IC1 is directly coupled to the 3IC2 input by 3R6, output to variable connector by 6 pin after amplifying, 3IC2 selects 0P07 linear integrated circuit, 3W1 for use, 3W2 and 3W3 play zeroing and calibration effect respectively.

As the above analysis, complete dynamo-electric source is controlled by timing switch circuit, open and close automatically.When the J1 of timing switch circuit works, the V2 power supply promotes through the 1IC1 isolation transmit, respectively by after 1IC2 and the 1IC3 voltage stabilizing, output ± 5V power supply is to linear amplifier, variable connector and the power supply of A/D converter negative pressure, by output 6V power supply after the 1IC3 voltage stabilizing sensor is powered, the V1 power supply is by powering to digital circuit and printer after the 1D1 step-down.After V2 passes through the mu balanced circuit voltage stabilizing respectively, to sensor, amplifier power supply, printer and digital circuit are used the power supply of V1 high capacity cell separately, be in order to reduce the interference that printer work is measured small-signal, 1IC4 selects LM317 for use among the figure, and 1IC2,1IC3 select 7800 series and 7900 series for use, and IC1 and IC2 strobe, IC3, IC4, IC5 have the inhibition oscillation action, and IW1 can regulate the supply voltage size of sensor.

By amplifier 3IC2 and the next two-way analog signal of 4IC2, insert four and five-way road of 5IC1 multiway analog switch respectively, 5IC1 is under the control of single-chip microcomputer 5IC8 P1 mouth output signal, the two-way analog signal is constantly alternately sent into 5IC2 carry out the A/D conversion, because 5IC1 realizes by the multiplexing of several lines to 1 line, make these facility be equipped with the function of dual-use (even eight usefulness), reached the purpose that a machine can be measured tubing pressure and two parameters of casing pressure simultaneously.

Modulus conversion chip 5IC2 adopts ICL7135 whole CMOS technology (41/2) position double integral A/D converter, it adopts the word bit dynamic scan binary-coded decimal way of output, when the two-way analog passband signal is crossed after multiway analog switch control alternately enters 5IC2, binary-coded decimal alternately through the processing, ten thousand, thousand, hundred, ten of 5IC2, individual each word bit is gone up appearance at B8, B4, B2, B1 end (13-16 pin), and occurs the word bit gate pulse synchronously at each end (12,17～20 pin) of D5～D1.Single-chip microcomputer 5IC8 is by 5IC4 and 5IC2 interface, the A/D conversion is carried out under Single-chip Controlling, main program starts 5IC2 and begins to carry out the A/D conversion, when the high-order gating signal D5(12 of 5IC2 pin is output as high level, myriabit B1 and polarity (POL), overrange OVER, owe range CNDER sign is sent into 5IC4 by 5IC3 frameshit device PA0～PA3(21～24 pin), when D5 was low level, the B1 of 5IC2, B2, B4, B8 output low level binary-coded decimal were still sent into PA0～PA3.The 5IC4PA mouth works in the gating input mode, the data output strobe line ST(26 pin of 5IC2) be connected to the data strobe signal line ASTB(PC2 of 5IC4 PA mouth) on (39 pin), 5IC3 PA mouth interrupt request line PC0(37 pin) reverse by 5IC5, connect the 5IC8INT1(13 pin) end, after 5IC4 finishes an A/D conversion, produce 5 data gate pulses, respectively every binary-coded decimal and bit flag are delivered to the PA mouth, after the PA mouth receives data, interrupt identification line PC0 becomes high level, interrupt to the 5IC8 application, after the interrupt response data of 5IC4A mouth are read in internal memory, after conversion finishes, all data of internal memory are calculated respectively, handle, drive printer prints and go out pressure on the number.

5IC6 is the Add-In memory, and the program Solidification that weaves is interior, after 5IC8 powers on, by 5IC7(address latch) call the program of carrying out in the 5IC6 successively, finish the A/D conversion and print the pressure result of measurement, 5IC4 selects 81C55 for use, 5IC6 selects 27C32 for use, and 5IC8 selects 80C31 for use.

The instrument of making according to the foregoing circuit structure can reach following technical indicator:

1, measures oil or air pressure, two groups of above parameters of casing pressure simultaneously;

2, measurement category is 0～40MPa;

3, certainty of measurement 0.01MPa;

4, measure error≤± 1.5%;

5, measure frequency: 2 times/day, and can appoint and decide;

6, adopt figure punch way of output record;

7, temperature-40 ℃ to+50 ℃ down all can operate as normal;

8, automatic writing time was greater than 4800 hours;

9, supply voltage is DC6V.

The utility model has the advantages that apparently, namely by adopting high-precision pressure on the number automatic recording instrument, Full-automatic picking is got accurate data entirely, has both improved the degree of accuracy of data, has alleviated again workman's labour intensity. Following characteristics are specifically arranged:

1, adopt pure powered by direct current, suitable field works long hours, and pressure sensor, measures conversion, time switch and micro-printer circuit and power respectively, has reduced interference, has improved job stability.

2, timing switch circuit has guaranteed the correct time of timing start-up, automatic shutdown, limnograph, and the surveying record time is arbitrarily adjustable.

3, owing to adopted single-chip microcomputer, thereby have multichannel and gather pressure data and processing capacity in real time, realized the automatic record of two pressure even multiple pressure force parameter.

4, energy consumption is low, can work the several months automatically continuously.

5, easy for installation, owing to adopted waterproof, anticorrosion, anti-theft measure, can be installed on the well site as ordinarily manometer.

Claims (3)

1, the automatic digital recorder of a kind of well micro mouth pressure mainly is made of main frame (1), power supply box (2) two parts, it is characterized in that:

(1), main frame places in the sealing shroud (3) by cover plate (12) sealing, insert main frame through the dry cell of waterproofing work by lead-in wire in the power supply box it powered;

(2), described main frame comprises measurement oil or air pressure and identical sensor and the amplifier circuit of casing pressure twice, analog switch 5IC ₁, A/D converter 5IC ₂, single-chip microcomputer 5IC ₈, timing switch circuit and printer P, the timing signal output of timing switch circuit is serially connected in the power supply loop through its electronic switch, and the signal of sensor output connects amplifier, is connected to analog switch 5IC then ₁Input, 5IC ₁Control end meet single-chip microcomputer 5IC ₈The P1 mouth, the output of analog signal and A/D converter 5IC ₂Input connects, 5IC ₈By interface circuit 5IC ₄With A/D converter 5IC ₂Interface.

2, the automatic digital recorder of well micro mouth pressure according to claim 1 is characterized in that timing switch circuit by timer SD, and delay circuit and electronic switch three parts are formed; Wherein delay circuit is by 7556 plesichronous circuit chip 2IC ₁And outer member is formed by connecting 2R ₂And 2C ₃Foundation prevents the first order delay time of electronic switch misoperation, 2R ₃, 2R ₄Set up second level delay time, promptly the short power connection of recorder is to the time of turn-offing, and electronic switch is by triode 2Q ₁And relay J ₁Form, wherein J ₁Constant open contact J _1-1, J _1-2Be serially connected in the power circuit.

3, the automatic digital recorder of well micro mouth pressure according to claim 1 is characterized in that described amplifier circuit is by 3IC ₁(or 4IC ₁), 3IC ₂(or 4IC ₂) dual-stage amplifier and peripheral cell formation.

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