Multi-type sensor signal high-temperature acquisition and storage processing circuit

Abstract

The utility model discloses a multi-type sensor signal high-temperature acquisition and storage processing circuit, and relates to the technical field of circuit data acquisition and storage. Through circuit combination of the single main control board and the plurality of acquisition circuit boards, independent work of the acquisition circuit boards is realized, cooperative work of the plurality of acquisition circuit boards can be carried out in cooperation with the main control board, and each acquisition circuit board can independently store data acquired by the sensor through the use of the rapid memory. And the packet loss rate in the data transmission process is reduced. By using an independent power supply to supply power, the loss of electric energy in the working process of the circuit can be reduced. According to the invention, various parameters in an underground high-temperature and high-pressure environment can be collected and stored in real time based on an independent circuit, different working modes can be set, and breakpoint continuous storage can be realized. And the accuracy and integrity of data acquisition in the drilling process are improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit data acquisition and storage, and in particular to a multi-type sensor data acquisition and storage processing circuit. Background Art

[0002] In the process of drilling oil and gas wells, some acquisition circuits are often installed at the drill bit to collect and record various parameters of the drill bit, including the vibration amplitude, temperature, humidity, drill bit depth and other specific parameters of the drill bit. Collecting these parameters during deep well drilling is of great significance for subsequent mine research.

[0003] However, due to the increasing depth of drilling, it is difficult to transmit drill bit data to the ground for drilling several kilometers long. At the same time, the high temperature generated during the drilling process and the long drilling time also need to be solved. Therefore, it is necessary to improve the acquisition circuit to ensure that the parameters can be stored in real time during the drilling process to avoid line interruption due to long-distance transmission. At the same time, it is necessary to meet the acquisition circuit to collect multiple parameters, set the acquisition frequency, perform periodic sampling, reduce the consumption of electrical energy, and ensure that the energy consumption during the acquisition circuit is controllable. Utility Model Content

[0004] The embodiment of the present application solves the problem of long-distance transmission difficulty and high power consumption in the acquisition of downhole parameters in the prior art by providing a high-temperature acquisition, storage and processing circuit for multiple types of sensor signals, and realizes a scalable system architecture for multiple sensor signals using one main control board.

[0005] In the first aspect, an embodiment of the present application provides a high-temperature acquisition, storage and processing circuit for multi-type sensor signals, including a main control board, an acquisition circuit board and a sensor group; the sensor group and the main control board are both connected to the acquisition circuit; the main control board includes a main control board FPGA, a main control board processor and a storage body; the main control board FPGA is electrically connected to the main control board processor and the storage body respectively; the acquisition circuit board includes an acquisition circuit board FPGA and an acquisition circuit board processor; the acquisition circuit board FPGA is electrically connected to the acquisition circuit board processor.

[0006] In combination with the first aspect, in a possible implementation, the main control board also includes a main control board driver and a main control board filter; one end of the main control board driver is electrically connected to the main control board FPGA, and the other end is electrically connected to the acquisition circuit board; the input end of the main control board filter is electrically connected to the acquisition circuit board, and the output end is electrically connected to the main control board FPGA; the main control board driver is used to amplify the electrical signal of the main control board FPGA to drive the acquisition circuit board to operate; the main control board filter is used to perform filtering operations on the electrical signal uploaded by the acquisition circuit board.

[0007] In combination with the first aspect, in a second possible implementation, the acquisition circuit board also includes an acquisition circuit driver and an acquisition circuit filter; one end of the acquisition circuit driver is electrically connected to the acquisition circuit FPGA, and the other end is electrically connected to the main control board.

[0008] In combination with the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner, the acquisition circuit board also includes an anti-aliasing circuit and an ADC analog-to-digital converter; the anti-aliasing circuit is electrically connected to the sensor group through a socket; the anti-aliasing circuit is electrically connected to the acquisition circuit FPGA through the ADC analog-to-digital converter; the anti-aliasing circuit is used to reduce interference and noise of the analog signal output by the sensor group to the acquisition circuit board, and the ADC analog-to-digital converter is used to convert the analog signal into a digital signal.

[0009] In combination with the first aspect, in a fourth possible implementation manner, the number of the acquisition circuit board is at least one, and the number of the sensor group is at least one.

[0010] In combination with the first aspect, in a fifth possible implementation manner, the sensor group includes a temperature sensor, a humidity sensor, a pressure sensor, or an angular velocity sensor.

[0011] In combination with the first aspect, in a sixth possible implementation, a power supply is further included, and the power supply is electrically connected to the main control board through a power supply socket; the power supply is used to provide working power to the main control board.

[0012] In combination with the first aspect, in a seventh possible implementation, it also includes an expansion acquisition circuit, which is electrically connected to the main control board through a socket; the expansion acquisition circuit is used to expand the number of acquisition circuit boards connected to the main control board.

[0013] In combination with the first aspect, in an eighth possible implementation, the main control board also includes a host computer socket; the host computer socket is used to provide a connection port when the main control board is connected to the host computer; the host computer socket can output at least one of a USB signal, a CAN signal and an IO port signal.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] The embodiments of the present application adopt a technical means of combining the signal acquisition circuit to work independently and collaboratively, powered by an independent power supply, and using a storage body to store the data collected by the sensor. This effectively solves the technical problems of the traditional downhole sensor signal acquisition and storage data transmission process being unsafe and the inability to achieve synchronous acquisition when the sensor collects signals, thereby achieving the technical effect of quickly storing the data collected by each sensor during the drilling process and quickly transmitting it when uploading to a PC. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A block diagram of a high-temperature acquisition and storage processing circuit for multiple types of sensor signals provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In an embodiment of the present application, a multi-type sensor signal acquisition, storage and processing circuit is provided, which includes a main control board, a plurality of acquisition circuit boards and a plurality of sensor groups.

[0020] The main control board is a circuit board composed of a number of electronic components, including a main control board FPGA, a main control board processor, a storage body, a main control board driver and a main control board filter.

[0021] The main control board FPGA is electrically connected to the main control board processor, the main control board filter, and the main control board driver. The output end of the main control board filter is electrically connected to the main control board FPGA, and the input end is connected to the socket; the input end of the main control board driver is connected to the main control board FPGA, and the output end is connected to the socket.

[0022] The main control board processor is also electrically connected to the storage body.

[0023] Among them, the main control board FPGA (full name: Field-Programmable Gate Array) is a chip whose internal logic structure can be changed through programming. It is used to program the main control board based on user needs, so that the main control board can respond to the user's programming results to complete the work content.

[0024] The main control board can be connected to the host computer through the host computer socket, wherein the host computer socket can output signals including but not limited to USB signals, CAN signals and IO port signals. The main control board can communicate with the host computer to realize functions such as setting the working mode, downloading acquisition parameters, clock frequency division selection, storage management, real-time clock setting, and exporting acquisition data. The main control board can download data through the host computer, and the download speed is not less than 1MB / s.

[0025] The main frequency of the main control board is ≥100MHz. The vibration index that the main control board needs to meet is 10grms, and the impact index is 1000g. It should be noted that these two indicators are test indicators when the circuit board is in the glue-sealed state.

[0026] After testing, after the main control board is sealed with glue, under vibration conditions (10grms), the accuracy of system data storage is ≥99.9%, and the accuracy of downloaded data is ≥99.9%.

[0027] After testing, the total power consumption of the main control board is within 7.2V and 50mA in non-collection and storage mode (non-computing state at this time). In full-speed working mode, the power consumption is within 7.2V and 0.3A (non-computing state); 7.2V and 0.4A (computing state).

[0028] It needs to be explained again that the main control board's external data download line plug is a 12-pin plug, which includes 2 power cords.

[0029] When working in acquisition mode, the main control board controls the sampling rate of each acquisition board, the recovery of acquired data, and the regular storage.

[0030] The main control board can set the acquisition frequency of each acquisition board. The acquisition frequency setting is the same as the sampling rate setting of the acquisition board. It can be set to 50KHz, 30KHz, 10KHz or 5KHz according to needs.

[0031] The number of acquisition circuit boards that can be connected to the main control board is 5, and their working conditions can meet the following requirements: the sampling frequency of one acquisition circuit board is high frequency (such as 40KHz / 30KHz), and the sampling frequencies of the other four acquisition circuit boards are set to low frequencies, such as 10KHz, 1KHz, 100KHz, etc. The above frequencies can be changed according to the working frequency of the main control board, such as changing to 9 / 10, 2 / 10 or 1 / 10 of the set frequency.

[0032] The maximum number of acquisition channels that the main control board can achieve is 40ch.

[0033] It should be noted that the storage body is a Flash storage body, which has the function of high-speed export at normal temperature. It can also withstand the high temperature of the underground working environment (usually the working temperature is about 150°C). The storage depth is 16GB, and the storage body has the function of bad block identification and management.

[0034] It should be noted again that the main control board is also provided with a clock circuit, which is electrically connected to the processor. The time setting of the clock circuit can be set by the host computer.

[0035] The acquisition circuit board includes an acquisition circuit board FPGA, an acquisition circuit board processor, an acquisition circuit driver, an acquisition circuit filter, an ADC analog-to-digital converter and an anti-aliasing circuit.

[0036] The acquisition circuit board FPGA is electrically connected to the acquisition circuit board processor, the acquisition circuit driver, the acquisition circuit filter and the ADC analog-to-digital converter, wherein the acquisition circuit board FPGA is electrically connected to the input end of the acquisition circuit driver and the output end of the acquisition circuit filter, and the output end of the acquisition circuit driver and the input end of the acquisition circuit filter are electrically connected to the socket; one end of the ADC analog-to-digital converter is electrically connected to the acquisition circuit board FPGA, and the other end is electrically connected to the output end of the anti-aliasing circuit, and the input end of the anti-aliasing circuit is electrically connected to the socket. The other end of the socket is connected to the sensor group.

[0037] The acquisition circuit board has an acquisition accuracy of 16 bits, a single-channel acquisition error of no more than 1mV, and a bandwidth of 52KHz. The acquisition circuit board has an anti-aliasing function and can perform low-pass filtering, and its filtering parameters are 100KHz, -3db±10%.

[0038] The number of sensing channels of the acquisition circuit board is 8ch, and it has a storage function with a storage depth of 4GB. The storage module has bad block identification and management functions. The acquisition circuit board also has a real-time clock, and its clock can be set by the host computer.

[0039] It should be noted that the sensor group includes one or more of a temperature sensor, a humidity sensor, a pressure sensor and an angular velocity sensor, or other sensors capable of collecting information about the environment in the well and the parameters of the drill bit itself.

[0040] It needs to be explained again that in order to ensure the integrity of data transmission and save space, the connection line between the sensor and the acquisition board should not exceed 25cm.

[0041] This application can set the working mode through the host computer before use, including:

[0042] The acquisition storage mode is divided into two acquisition storage modes: before and after time triggering. Storage starts when the set conditions are met (for example, the length of the condition time is set to 10 hours later). After storage starts, storage is performed at equal time intervals (for example, the acquisition data of the previous 5 minutes is stored every 10 minutes).

[0043] Pre-trigger working mode: the working mode before entering the "time triggered storage" trigger, also called the front part (for example, from the beginning to 10 hours), sampling at a low sampling rate (usually 0.001Hz-1Hz), sampling and storage when working, and neither sampling nor storage when not working.

[0044] Post-trigger working mode: The working mode after "time-triggered storage" triggers sampling at the specified sampling rate. For example, the first 5 minutes of 10 minutes are sampled and stored, and the last 5 minutes are neither sampled nor stored.

[0045] In the embodiment of the present application, the downhole environmental parameters are collected based on the combination of the main control board and several collection circuit boards, so that independent collection and independent power supply can be achieved. By setting several working modes and different sampling rates, power consumption can be reduced and the memory occupied by useless data can be reduced. While improving storage efficiency, the problems of large power loss and high packet loss rate in the traditional process of collecting parameters of downhole drill bits and environments can be solved.

[0046] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in this embodiment is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in sequence or in parallel according to the method shown in this embodiment or the accompanying drawings (for example, in a parallel processor or multi-threaded processing environment).

[0047] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. All or part of this application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, mobile communication terminals, multi-processor systems, microprocessor-based systems, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0048] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A high temperature acquisition and storage processing circuit for multi-type sensor signals, characterized in that: Including main control board, acquisition circuit board and sensor group; The sensor group and the main control board are both connected to the acquisition circuit; The main control board includes a main control board FPGA, a main control board processor and a storage body; The main control board FPGA is electrically connected to the main control board processor and the storage body respectively; The acquisition circuit board includes an acquisition circuit board FPGA and an acquisition circuit board processor; The acquisition circuit board FPGA is electrically connected to the acquisition circuit board processor.

2. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1, characterized in that: The main control board also includes a main control board driver and a main control board filter; One end of the main control board driver is electrically connected to the main control board FPGA, and the other end is electrically connected to the acquisition circuit board; The input end of the main control board filter is electrically connected to the acquisition circuit board, and the output end is electrically connected to the main control board FPGA; The main control board driver is used to amplify the electrical signal of the main control board FPGA to drive the acquisition circuit board to operate; The main control board filter is used to perform filtering operations on the electrical signals uploaded by the acquisition circuit board.

3. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1, characterized in that: The acquisition circuit board also includes an acquisition circuit driver and an acquisition circuit filter; One end of the acquisition circuit driver is electrically connected to the acquisition circuit FPGA, and the other end is electrically connected to the main control board.

4. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1 or 3, characterized in that: The acquisition circuit board also includes an anti-aliasing circuit and an ADC analog-to-digital converter; The anti-aliasing circuit is electrically connected to the sensor group through a socket; The anti-aliasing circuit is electrically connected to the acquisition circuit FPGA through the ADC analog-to-digital converter; The anti-aliasing circuit is used to reduce interference and noise of the analog signal output by the sensor group to the acquisition circuit board, and the ADC analog-to-digital converter is used to convert the analog signal into a digital signal.

5. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1, characterized in that: The number of the acquisition circuit board is at least one, and the number of the sensor group is at least one.

6. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1, characterized in that: The sensor group includes a temperature sensor, a humidity sensor, a pressure sensor or an angular velocity sensor.

7. The high-temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1 further comprises a power supply, characterized in that: The power supply is electrically connected to the main control board via a power supply socket; The power supply is used to provide working power to the main control board.

8. The high-temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1 further comprises an expansion acquisition circuit, characterized in that: The expansion acquisition circuit is electrically connected to the main control board via a socket; The expansion acquisition circuit is used to expand the number of the acquisition circuit boards connected to the main control board.

9. The high temperature acquisition and storage processing circuit for multi-type sensor signals according to claim 1, characterized in that: The main control board also includes a host computer socket; The host computer socket is used to provide a connection port when the main control board is connected to the host computer; The host computer socket can output at least one of a USB signal, a CAN signal and an IO port signal.

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