CN102758615A - High-accuracy smart dual-core well depth measuring device - Google Patents

Abstract

The invention provides a high-precision intelligent dual-core well depth measurement device, which includes a steel wire rope, a pulley, a bracket, an incremental photoelectric rotary encoder, an electric wire rope winch, and a depth measurement control center. One end of the wire rope is connected to a well logging probe, and the other end is wrapped from above. It is connected to the electric wire rope winch after passing through the partial wheel surface of the pulley. The pulley is set on the bracket through the sliding bearing, and the incremental photoelectric rotary encoder is connected to the pulley. The bearing rotates and outputs two-way pulse A-phase and B-phase pulse signals with a phase difference of 90°. The depth measurement control center includes a real-time fast measurement processing core, a multi-thread processing core and peripheral input and output that receive the above two pulse signals in real time and perform related processing. and drive unit. The invention is used for measuring well depth, hole depth, etc., and has the advantages of good real-time performance, high precision, high efficiency, intelligence and the like.

Description

A high-precision intelligent dual-core well depth measurement device

technical field

The invention relates to the technical field of well surveying and logging, in particular to a high-precision intelligent dual-core well depth measurement device, which is used for measuring the depth of a downhole probe and measuring depth or length and distance in other places.

Background technique

At present, the following methods are used to measure the depth of downhole probes in the process of well exploration and logging:

1. Use a measuring rope marked with a length mark to measure, manually record or visually measure the depth of the measuring rope, this method is inefficient and the depth measurement error is large;

2. In the other way, the steel wire rope passes through the pulley, and the sensing circuit built by the Hall sensor is used on the pulley. The output signal is counted by the C51 single-chip microcomputer. The C51 single-chip microcomputer also needs to communicate with the computer and drive the LED display. Because the resolution of the sensing circuit constructed by the Hall sensor is generally limited, for example, the number of output pulses of the Hall sensor is generally 32 per revolution of the pulley, and the resolution is obviously low; in addition, the C51 single-chip microcomputer is used for pulse counting and communication, and depth display Simultaneous processing will lead to a large error in pulse counting, because the C51 single-chip microcomputer operates with a limited maximum frequency and single-core mode, which will cause counting pulses to be lost during other operations, such as communicating with a computer. Therefore, the depth measurement error of this method is extremely large. In practical application, if the wire rope is retracted and retracted too fast, the depth measurement error will be larger than that of the first measurement method, and it is very difficult to control.

Therefore, the existing well depth measurement schemes have problems such as low efficiency, large measurement errors, low measurement resolution, and inflexible use.

Contents of the invention

The purpose of the present invention is to provide a high-precision intelligent dual-core well depth measurement device, which can solve the above-mentioned technical problems in the prior art, and has high measurement efficiency, small measurement error and high measurement resolution.

A high-precision intelligent dual-core well depth measurement device, including a wire rope, a pulley, a bracket, an incremental photoelectric rotary encoder, an electric wire rope winch, and a depth measurement control center. The part of the wheel surface is connected with the electric wire rope winch. The pulley is set on the bracket through the sliding bearing. The incremental photoelectric rotary encoder is connected with the pulley transmission. Every time the pulley rotates once, the incremental photoelectric rotary encoder bearing rotates and outputs Two-way pulse A-phase and B-phase pulse signals with a phase difference of 90°. The depth measurement control center includes a real-time fast measurement processing core, a multi-thread processing core, and peripheral input and output and drive units that receive the above two pulse signals in real time and perform related processing. .

In the above-mentioned high-precision intelligent dual-core well depth measurement device, the fast measurement processing core includes a filtering debounce and shaping module, a counting module, a count input module, and a count value output module, and the filtering debounce and shaping module is used to perform real-time Fast filtering, de-jittering and shaping processing, output counting pulse signal and incremental photoelectric rotary encoder rotation direction signal, the counting module adds 1 or subtracts 1 to the pulse signal according to the polarity of the rotation direction, and the cumulative counting value of the pulse is n ; The fast measurement processing core uses the counting input module to prefabricate the counting initial value through multi-thread processing, and outputs the pulse accumulation count value n to the multi-thread processing core through the counting output module, and then performs calculation and display processing.

In the above-mentioned high-precision intelligent dual-core well depth measurement device, the multi-thread processing core is used to read the pulse cumulative count value n output by the fast measurement processing core, and configure the pulley diameter D parameter and increment through the peripheral input and output and drive unit input. Quantitative photoelectric rotary encoder has the pulse number N parameter per revolution, and the real-time depth value Depth is obtained by calculating the depth calculation formula: Depth=((π*D)/N)*n.

In the high-precision intelligent dual-core well depth measurement device as described above, the peripheral input and output and drive units include a stepper motor drive unit, a display unit, a keyboard input unit RS232 communication unit, a non-volatile storage unit; the stepper motor drive unit is connected with the electric wire rope winch, the diameter D parameter of the pulley and the pulse number N parameter per revolution of the incremental photoelectric rotary encoder are input and configured through the keyboard input unit or the upper system using the RS232 communication unit; The non-volatile storage unit is used to store the above parameter configuration; the display unit is used to display the real-time depth value Depth calculated by the multi-thread processing core.

In the above-mentioned high-precision intelligent dual-core well depth measurement device, the fast measurement processing core adopts a programmable gate array digital processing chip.

As mentioned above, the high-precision intelligent dual-core well depth measurement device adopts the ARM7 single-core processor chip as the multi-thread processing core.

The real-time fast measurement processing core and the multi-thread processing core in the present invention constitute the intelligent double processing core of the depth measurement control center, and the real-time fast measurement processing core is specially responsible for the filtering and counting processing of the output signal of the incremental photoelectric rotary encoder, and the The real-time fast measurement processing core uses a programmable gate array chip, which has the characteristics of fast processing speed and strong real-time performance, thereby greatly reducing data loss, reducing measurement errors, and improving real-time performance of measurement; while the multi-thread processing core is mainly responsible for human-computer interaction. , the real-time requirements are relatively low, and it has a strong advantage in depth measurement intelligence.

Compared with the prior art, the present invention has good real-time performance, less data loss, small measurement error, high measurement resolution, high measurement efficiency, many communication channels, flexible drive control and easy to use due to the adoption of dual-core intelligent computing and processing methods. Advantages such as simplicity.

Description of drawings

Fig. 1 is a schematic diagram of the mechanical structure principle of one embodiment of the present invention;

Fig. 2 is the overall control circuit block diagram of the present invention;

Fig. 3 is the circuit block diagram of real-time fast measurement processing core 201 of the present invention;

FIG. 4 is a circuit block diagram of the peripheral I/O and driving unit 203 of the present invention.

FIG. 5 is a schematic diagram of filtering and dejittering and shaping module 401 outputting pulse filtering and dejittering and direction recognition in the real-time fast measurement processing core 201 of the present invention;

Fig. 6 is an overall detailed control circuit block diagram of the present invention.

In the figure: 101-wire rope, 102-pulley, 103-bracket, 104-incremental photoelectric rotary encoder, 105-electric wire rope winch, 106-depth measurement control center, 201-real-time fast measurement processing core, 202-multithreading Processing core, 203-peripheral input and output and drive unit, 301-stepper motor drive unit, 302-display unit, 303-keyboard input unit, 304-RS232 communication unit, 305-non-volatile storage unit, 401-filter Jitter and shaping module, 402-counting module, 403-counting input module, 404-counting value output module.

Detailed ways

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

Please refer to Fig. 1, the present invention provides a high-precision intelligent dual-core well depth measurement device, including a wire rope 101, a pulley 102, a bracket 103, an incremental photoelectric rotary encoder 104, an electric wire rope winch 105 and a depth measurement control center 106, incremental Type photoelectric rotary encoder 104 is connected with depth measurement control center 106. Please refer to FIG. 2 , the depth measurement control center 106 includes a real-time fast measurement processing core 201 , a multi-thread processing core 202 , and a peripheral input/output and drive unit 203 connected in sequence.

One end of the wire rope 101 is connected to the well logging probe, and the other end is connected with the electric wire rope winch 105 after passing through the partial wheel surface of the pulley 102 from above. During the lifting or lowering process of the wire rope 101, the wire rope 101 drives the pulley 102 to rotate forward or reverse accordingly; the pulley 102 is set on the bracket 103 through a sliding bearing; the incremental photoelectric rotary encoder 104 is fixed on the bracket 103; The photoelectric rotary encoder 104 is connected to the pulley 102 through its shaft, and the pulley 102 drives the bearing of the incremental photoelectric rotary encoder 104 to rotate one revolution every time it rotates. Incremental photoelectric rotary encoder 104 bearings rotate and output two-way pulse A-phase and B-phase pulse signals with a phase difference of 90° (as shown in Figure 5), which are connected to the real-time fast measurement processing core 201 for pulse dejitter filtering, rotation Direction identification and pulse counting, etc., the sliding direction of the above-mentioned pulley 102 can be determined by the positive and negative of the two-way phase difference, and each complete pulse cycle corresponds to a set basic length, wherein the two-way output of the incremental photoelectric rotary encoder 104 Only one complete cycle of the pulse signal with a phase difference of 90° generates an output counting pulse signal; then the multi-threaded processing core 202 reads the accumulated pulse count value, and configures the diameter D parameter of the pulley 102 and the increment through the peripheral input and output and the drive unit 203 Type photoelectric rotary encoder 104 rotates one circle of pulse number N parameters, through the depth calculation formula: depth Depth=((π*D)/N)*n, wherein n is the real-time pulse cumulative count value, thereby obtaining the real-time depth value Depth.

Please refer to FIG. 3, the fast measurement processing core 201 includes a filter debounce and shaping module 401, a counting module 402, a count input module 403, a count value output module 404, a filter debounce and shaping module 401 and an incremental photoelectric rotary encoder The output terminal of the filter 104 is connected, the output terminal of the filter debounce and shaping module 401 is connected with the counting module 402, and the counting input module 403 and the counting value output module 404 are respectively connected with the counting module 402.

The fast measurement processing core 201 first performs real-time fast filtering, de-jittering and shaping processing on the two pulse signals output by the incremental photoelectric rotary encoder 104 with a phase difference of 90° through the filtering, de-jittering and shaping module 401, and outputs a counting pulse signal and the incremental photoelectric rotary encoder 104 rotation direction signals; then the counting module 402 adds 1 or subtracts 1 to the pulse signal according to the polarity of the rotation direction, and the cumulative count value is n; the fast measurement processing core 201 uses counting The input module 403 prefabricates the initial count value through the multi-thread processing core 202, and outputs the accumulated count value n to the multi-thread processing core 202 through the count output module 404, and then performs calculation and display processing.

Please refer to Fig. 4, described peripheral input and output and driving unit 203 comprise stepper motor driving unit 301, display unit 302, keyboard input unit 303, RS232 communication unit 304, non-volatile memory that are respectively connected with multi-thread processing core 202 Unit 305. The multi-thread processing core 202 sends the calculated real-time depth value Depth to the display unit 302 of the peripheral input and output and driving unit 203 for display. The electric wire rope winch 105 is connected with the stepper motor drive unit 301, adopts an automatic control mode, and its speed is flexibly configured through the host system. Please refer to FIG. 6 for the detailed circuit block diagram of the present invention.

In the specific implementation of the present invention, the diameter D of the pulley 102 is selected as 150 mm, and the parameter N of the number of pulses per revolution of the incremental photoelectric rotary encoder 104 is selected as 1000. These two parameters are input and configured through the keyboard input unit 303 or through the host system using the RS232 communication unit 304 . After the parameter configuration is completed, it is stored in the non-volatile storage unit 305 through the multi-threaded processing core 202, so that it does not need to be configured again when it is powered on next time.

According to the parameters selected above, the resolution of the well depth measurement is (π*D)/N, ie 0.471mm; the depth corresponding to each revolution of the incremental photoelectric rotary encoder 104 is 471mm, ie 0.471m.

For well depth measurement, it is necessary to configure the initial value of the well depth through the keyboard input unit 303 or through the host system using the RS232 communication unit 304 .

In the implementation of the present invention, when the logging probe is at the well head of a well depth of 80m, the initial depth is set to be 0, and then it is lowered close to the bottom of the well, showing that the logging depth is 79.523m, and then pulled up to the well head again, showing that the logging depth is 0.001m. The well depth measurement is carried out by repeatedly lowering the probe and pulling up the probe, which is consistent. The well depth measurement resolution and measurement accuracy meet the well depth measurement requirements.

In the implementation of the present invention, the automatic control mode of the electric wire rope winch 105 is adopted, and after the configuration of the lowering and pulling up speed of the logging probe is performed through the keyboard input unit 303 or the upper system using the RS232 communication unit 304, the well depth measurement will be carried out automatically without manual labor Intervention improves the efficiency of well depth measurement.

The photoelectric rotary encoder of the present invention uses an incremental photoelectric rotary encoder 104, so there is no limit to the maximum depth of well depth measurement, but in the implementation of the present invention, it is limited by the program, and the deepest depth is limited to 999.999m, and the minimum effective display is 1mm , that is, 0.001m.

The fast measurement processing core 201 can use a programmable gate array digital processing chip, and the multi-thread processing core 202 can use an ARM7 single-core processor chip.

In the implementation of the present invention, the well depth measurement is not affected by the surrounding environment and has the characteristics of anti-interference when the drilling is performed in the field. The present invention is also applicable to measuring distance or length in other places.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any changes or substitutions that can be easily imagined by those skilled in the art within the technical scope disclosed in the present invention, All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1. high-precision intelligent double-core well depth survey device; It is characterized in that: comprise wire rope (101), pulley (102), support (103), increment photoelectric rotary encoder (104), electronic rope winch (105) and depth survey control centre (106); One end of wire rope (101) connects well-logging probe; Bag is connected with electronic rope winch (105) behind the local wheel face of pulley (102) other end from the top; Said pulley (102) is arranged on the support (103) through sliding bearing; Increment photoelectric rotary encoder (104) is in transmission connection with said pulley (102); Pulley (102) whenever rotates a circle, the two-way pulse A that increment photoelectric rotary encoder (104) bearing rotation phase difference output is 90 ° mutually with the B phase pulse signal, depth survey control centre (106) comprises that the measurement processing real-time of going forward side by side the above-mentioned two pulse signals of real-time reception line correlation handling examines (201), multithreading process nuclear (202) and peripheral input and output and driver element (203).

2. high-precision intelligent double-core well depth survey device as claimed in claim 1; It is characterized in that: said quick measurement processing nuclear (201) comprise filtering go shake with Shaping Module (401), counting module (401), count input module (403), count value output module (404); Said filtering is gone shake and Shaping Module (401) to be used for the executive real-time quick filter and is gone shake and shaping processing; Output counting pulse signal and increment photoelectric rotary encoder (104) direction of rotation signal; Counting module (402) pulse signals adds 1 and perhaps subtracts 1 accumulated counts according to direction of rotation polarity, and the pulse accumulation count value is n; Said quick measurement processing nuclear (201) adopts counting input module (403) to carry out prefabricated through multithreading process nuclear (202) to the counting initial value; And pulse accumulation count value n is outputed to multithreading process nuclear (202) through counting output module (404), calculate then and show processing.

3. high-precision intelligent double-core well depth survey device as claimed in claim 2; It is characterized in that: said multithreading process nuclear (202) is used to read the pulse accumulation count value n of quick measurement processing nuclear (201) output; And through peripheral input and output and driver element (203) input configuration pulley (102) diameter D parameter and increment photoelectric rotary encoder (104) the umber of pulse N parameter that whenever rotates a circle, ((π * D)/N) * n calculates real-time deep value Depth through depth calculation formula: depth D epth=.

4. high-precision intelligent double-core well depth survey device as claimed in claim 3 is characterized in that: said peripheral input and output comprise step motor drive unit (301), display unit (302), keyboard input block (303), RS232 communication unit (304), the non-volatile memory cells (305) that is connected with multithreading process nuclear (202) respectively with driver element (203); Step motor drive unit (301) is connected with electronic rope winch (105), and said pulley (102) diameter D parameter and increment photoelectric rotary encoder (104) the umber of pulse N parameter that whenever rotates a circle is imported configuration through keyboard input block (303) or through upper system employing RS232 communication unit (304); Non-volatile memory cells (305) is used to store the above-mentioned parameter configuration; The real-time deep value Depth that display unit (302) is used for multithreading process nuclear (202) is calculated shows.

5. high-precision intelligent double-core well depth survey device as claimed in claim 1 is characterized in that: said quick measurement processing nuclear (201) adopts the programmable gate array digital processing chip.

6. high-precision intelligent double-core well depth survey device as claimed in claim 1 is characterized in that: multithreading process nuclear (202) adopts ARM7 single core processor chip.

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