Earthquake data acquisition station with intelligent controllable switch, acquisition system and switch control method

Abstract

This invention relates to an intelligent controllable switch-based seismic data acquisition station, acquisition system, and power-on / off control method. The acquisition station includes a sealed enclosure, a power supply unit housed within the sealed enclosure, and a seismic detection and acquisition unit powered by the power supply unit. The key feature is that the seismic data acquisition station further includes a switch control unit and a switch sensing unit housed within the sealed enclosure. The switch sensing unit is electrically connected to the switch control unit and is used to sense and generate a switch control signal, which is then transmitted to the switch control unit. The switch control unit is electrically connected to the switch sensing unit, the seismic detection and acquisition unit, and the power supply unit, and is used to control the power supply unit to power or deactivate power to the seismic detection and acquisition unit based on the switch control signal. This invention avoids the drawbacks of existing technologies that require an external switch and offers advantages such as ease of operation and high reliability.

Description

Technical Field

[0001] This invention relates to the field of earthquake detection technology, and in particular to an intelligent controllable switch earthquake data acquisition station, acquisition system, and on / off control method. Background Technology

[0002] Seismic data acquisition stations are used for outdoor seismic data acquisition and are typically deployed on the ground in geological exploration areas. During operation, they are powered by an internal battery. When not in operation, such as during storage or transportation after manufacturing and inspection, the internal battery power must be switched off. When acquiring data at the earthquake site, the power supply to the seismic data acquisition station needs to be turned on or off according to the data acquisition schedule (sometimes requiring daily power on / off).

[0003] During geological exploration (lasting several days or even dozens of days), seismic data acquisition stations are located on the ground, exposed to sun, rain, frost, and snow, creating extremely harsh working environments. They are required to withstand rolling and falling from a certain height (usually one meter). If conventional toggle, plug-in, or push-button switches are used as power switches, the power switches must be installed on the outer casing. This presents a series of technical challenges, such as sealing the outer casing of the seismic data acquisition station, waterproofing, moisture-proofing, leakage prevention, and short-circuit prevention. This leads to increased material and manufacturing costs for the seismic data acquisition station. Rolling, falling, and transportation processes can all cause switch malfunctions, reducing reliability and making it impossible to guarantee that the seismic data acquisition station will work normally according to the needs of geological exploration. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an intelligent and controllable switch earthquake data acquisition station.

[0005] Another technical problem to be solved by the present invention is to provide an intelligent and controllable switch earthquake data acquisition system.

[0006] Another technical problem to be solved by the present invention is to provide a method for controlling the power on / off of an earthquake data acquisition station.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A smart, controllable switch-based seismic data acquisition station is provided, comprising a sealed housing, a power supply unit disposed within the sealed housing, and a seismic detection and acquisition unit powered by the power supply unit; the seismic data acquisition station further includes a switch control unit disposed within the sealed housing, and a switch sensing unit; wherein,

[0008] The switch sensing unit is electrically connected to the switch control unit and is used to sense and generate a switch control signal and transmit it to the switch control unit.

[0009] The switch control unit is electrically connected to the switch sensing unit, the earthquake detection and acquisition unit, and the power supply unit, and is used to control the power supply unit to supply power to or stop supplying power to the earthquake detection and acquisition unit according to the switch control signal.

[0010] Preferably, the switch sensing unit includes a magnetic induction sensing unit for sensing and generating the switch control signal when an external magnet approaches.

[0011] Preferably, the magnetic induction sensing unit includes a magnetic induction sensor and a signal conditioning circuit connected to the magnetic induction sensor;

[0012] The magnetic induction sensor is used to generate a trigger signal when an external magnet is sensed approaching, and sends it to the signal conditioning circuit;

[0013] The signal conditioning circuit is connected to the switch control unit and is used to condition the trigger signal to generate the switch control signal and send it to the switch control unit.

[0014] Preferably, the magnetic induction sensor includes one or more of a magnetoresistive element, a Hall element, and a reed switch.

[0015] The present invention also provides an earthquake data acquisition system, including an earthquake data acquisition station as described in any of the above claims, and a signal triggering element separate from the earthquake data acquisition station; the switch sensing unit of the earthquake data acquisition station senses the signal triggering element and generates a switch control signal.

[0016] Preferably, the signal trigger includes a permanent magnet.

[0017] The present invention also provides a method for controlling the power on / off of an earthquake data acquisition station, comprising the following steps:

[0018] S1: Records the working status of the seismic data acquisition station;

[0019] S2: Sensing and generating a switch control signal;

[0020] S3: Change and store the working state of the seismic acquisition station according to the switch control signal, so as to control the power supply unit to supply power to the seismic detection and acquisition unit or stop supplying power.

[0021] Preferably, step S2 includes:

[0022] S2-1: Sensing magnetic intensity signal;

[0023] S2-2: When the magnetic strength signal is greater than the preset value, a trigger signal is generated;

[0024] S2-3: Generate the switch control signal according to the trigger signal.

[0025] Preferably, step S3 includes:

[0026] S3-1: Determine whether the switch control signal is a valid switch control signal;

[0027] S3-2: Within a set time interval, count the number of valid switch control signals;

[0028] S3-3: When the number of times equals the set number of times, change and store the working status of the seismic acquisition station, and control the power supply unit to supply power to the seismic detection and acquisition unit or stop supplying power.

[0029] Preferably, the switch control signal is a magnetic induction pulse signal;

[0030] In step S3-1, it is determined whether the duration of the high or low potential of the magnetic induction pulse signal reaches the set time; if so, it is determined to be the valid switch control signal.

[0031] In step S3-2, the number of pulses of the magnetic induction pulse signal is calculated within a set time interval, and the number of pulses is counted.

[0032] In step S3-3, when the number of times equals the first set number of times, the working state of the seismic acquisition station is changed to the power-on state and stored, and the power supply unit is controlled to supply power to the seismic detection and acquisition unit; when the number of times equals the second set number of times, the working state of the seismic acquisition station is changed to the power-off state and stored, and the power supply unit is controlled to cut off power to the seismic detection and acquisition unit.

[0033] Compared with the prior art, the present invention has the following advantages: a switch sensing unit set in a sealed shell senses and generates a switch control signal, and the switch control unit controls the power supply unit to supply power to or stop supplying power to the seismic detection and acquisition unit according to the switch control signal, which avoids the defects caused by the need to set an external switch in the prior art, and has the advantages of simple operation and high reliability. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0035] Figure 1 This is a schematic diagram of an embodiment of the seismic data acquisition station of the present invention;

[0036] Figure 2 This is a schematic block diagram of an embodiment of the seismic data acquisition station of the present invention;

[0037] Figure 3This is a circuit diagram of the switch sensing unit of an embodiment of the earthquake data acquisition station of the present invention;

[0038] Figure 4 This is a circuit diagram of a switch sensing unit according to another embodiment of the seismic data acquisition station of the present invention;

[0039] Figure 5 This is a flowchart illustrating the power-on / off control method for the seismic data acquisition station of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 , 2 The diagram illustrates an embodiment of the seismic data acquisition station of the present invention, comprising a sealed housing 100, and a power supply unit 200, a seismic detection and acquisition unit 300, a switch control unit 500, and a switch sensing unit 400 disposed within the sealed housing 100. The switch sensing unit 400, disposed within the sealed housing 100, senses and generates a switch control signal. The switch control unit 500 then controls the power supply unit 200 to supply power to or de-supply the seismic detection and acquisition unit 300 based on the switch control signal. This avoids the drawbacks of prior art requiring an external switch, and offers advantages such as ease of operation and high reliability.

[0042] As shown in the figure, the sealed outer casing 100 includes an upper casing 110 and a lower casing 120. The upper casing 110 and the lower casing 120 can be combined to form a closed whole, thereby achieving a waterproof seal for its internal circuits, devices, etc. In this embodiment, the upper casing 110 and the lower casing 120 are detachable structures, and various existing waterproof sealing structures can be provided between them. It is understood that in other embodiments, the upper casing 110 and the lower casing 120 may also be non-detachable structures, thereby forming a complete sealed body.

[0043] Furthermore, to facilitate the fixed installation of the seismic data acquisition station at a suitable acquisition location, a detachable fixing cone assembly 130 can be installed at the lower part of the sealed casing 100. The fixing cone assembly 130 is used to install the entire seismic data acquisition station at a suitable location. Understandably, the seismic data acquisition station can also be installed using various existing installation methods without using the fixing cone assembly 130, as long as the seismic data acquisition station can be fixedly installed.

[0044] The sealed housing 100 houses a power supply unit 200, a seismic detection and acquisition unit 300, a switch control unit 500, and a switch sensing unit 400. In this embodiment, the power supply unit 200 is installed in the lower housing 120, while the seismic detection and acquisition unit 300, switch control unit 500, and switch sensing unit 400 are installed in the upper housing 110. The power supply unit 200 supplies power to the seismic detection and acquisition unit 300, switch control unit 500, and switch sensing unit 400 via terminal assemblies. This separate arrangement facilitates charging, data reading, and other operations. It is understood that the arrangement of the power supply unit 200, seismic detection and acquisition unit 300, switch control unit 500, and switch sensing unit 400 can be adjusted according to actual needs.

[0045] The power supply unit 200 supplies power to the entire seismic data acquisition station and includes a rechargeable battery pack 210 and a power management circuit 220. In this embodiment, the rechargeable battery pack 210 is located in the lower housing 120, while the power management circuit 220 is located in the upper housing 110, and the two are electrically connected through contact terminals. The power management circuit 220 can be mounted on the same circuit board as the seismic detection and acquisition unit 300, the switch sensing unit 400, and the switch control unit 500, and is fixedly installed in the upper housing 110, realizing signal and data transmission through communication interfaces, etc.

[0046] It is understood that in other embodiments, the rechargeable battery pack 210 and the power management circuit 220 may also be disposed in the lower housing 120 or the upper housing 110; the power management circuit 220, the earthquake detection and acquisition unit 300, the switch sensing unit 400, the switch control unit 500, etc. may also be disposed on the same circuit board or multiple circuit boards.

[0047] The power management circuit 220 is electrically connected to the seismic detection and acquisition unit 300, the switch sensing unit 400, and the switch control unit 500, converting the power from the rechargeable battery pack 210 to power the seismic detection and acquisition unit 300, the switch sensing unit 400, and the switch control unit 500. It can be understood that the power management circuit 220 may include a working power supply module and a standby working module. The working power supply module is connected to the seismic detection and acquisition unit 300 to power the seismic detection and acquisition unit 300 under normal working conditions. The standby working module is connected to the switch sensing unit and the switch control unit 500 to power the switch sensing unit and the switch control unit 500 under standby conditions, thereby reducing the overall power consumption of the acquisition station and extending its operating time. Furthermore, upon receiving a switch control signal, it triggers the working power supply module to enter normal working condition and power the seismic detection and acquisition unit 300. Of course, the rechargeable battery pack 210 may also use one or more sets of rechargeable batteries and / or non-rechargeable batteries to provide power in different states.

[0048] Furthermore, the seismic data acquisition station may also include an indicator unit 140 housed within the enclosed enclosure 100. In some embodiments, the indicator unit 140 may include an LED light and a driving circuit. The LED light indicates the operating status of the seismic data acquisition station. Of course, in some embodiments, the indicator unit may be omitted.

[0049] In this embodiment, the seismic detection and acquisition unit 300 includes a seismic detector, a data acquisition unit, a control unit, a storage unit, and a communication interface unit, which can be mounted on the same or different circuit boards and installed inside the sealed housing 100 to realize seismic detection and acquisition. The seismic detector is located at the bottom inside the seismic data acquisition station housing, sensing and detecting seismic waves, converting them into corresponding electrical signals, and outputting them to the data acquisition unit. It is understood that the seismic detection and acquisition unit 300 can also employ various existing acquisition schemes without limitation.

[0050] The switch sensing unit 400 and the switch control unit 500 are also housed within the sealed enclosure 100, and are used to control the power supply unit 200 to supply power to or de-supply the seismic detection and acquisition unit 300. The switch sensing unit 400 is electrically connected to the switch control unit 500, and is used to sense and generate a switch control signal that is transmitted to the switch control unit 500. The switch control unit 500 is electrically connected to the switch sensing unit 400, the seismic detection and acquisition unit 300, and the power supply unit 200, and is used to control the power supply unit 200 to supply power to or de-supply the seismic detection and acquisition unit 300 according to the switch control signal.

[0051] In this embodiment, the switch sensing unit 400 includes a magnetic induction sensing unit for sensing and generating a switch control signal when an external magnet approaches. The magnetic induction sensing unit includes a magnetic induction sensor 410 and a signal conditioning circuit 420 connected to the magnetic induction sensor 410.

[0052] The magnetic induction sensor 410 generates a trigger signal when an external magnet is detected approaching, and sends it to the signal conditioning circuit 420. The magnetic induction sensor 410 includes one or more of a magnetoresistive element, a Hall element, and a reed switch. By sensing the magnetic strength signal of an external magnet using the magnetic induction sensor 410, a trigger signal is generated when the magnetic strength signal exceeds a preset value. This simplifies the technical solutions required for seismic data acquisition stations, such as enclosure sealing, waterproofing, moisture resistance, leakage prevention, and short-circuit protection, which are typically provided by conventional contact switches. Compared to wireless remote control solutions, this method offers simpler circuitry, lower cost, easier operation, and better anti-interference performance.

[0053] The signal conditioning circuit 420 is connected to the switch control unit 500 and is used to condition the trigger signal to generate a switch control signal to be sent to the switch control unit 500. In this embodiment, when an external magnet approaches the magnetic induction sensor 410 multiple times, multiple trigger signals are generated. The signal conditioning circuit 420 conditions the magnetic induction trigger signals to generate multiple trigger pulse signals as switch control signals and sends them to the switch control unit 500. The switch control unit 500 then determines whether the preset power-on / off rules are met, and controls the power supply unit 200 to supply power to the earthquake detection and acquisition unit 300 or to stop supplying power.

[0054] The switch control unit 500 is electrically connected to the switch sensing unit 400, the seismic detection and acquisition unit 300, and the power supply unit 200. It controls the power supply unit 200 to supply power to or de-supply the seismic detection and acquisition unit 300 according to switch control signals. In this embodiment, the switch control unit 500 can be an embedded processor, such as an STM32F2xx embedded chip, or an STM32F3xx, STM32F4xx series chip, or other similar embedded chips. At the seismic exploration site, when strong magnetic field interference is encountered, the switch sensing unit 400 will output a sensing signal. Since the intensity and duration of the magnetic interference signal are irregular, the digital filtering processing of the switch control unit 500 filters out the interference signal, improving anti-interference capability and ensuring reliable power supply connection and disconnection for the seismic data acquisition station.

[0055] The switch control unit 500 includes a signal level judgment and duration timing module, a valid signal counting module, a state storage module, and a switch control execution module. The signal level judgment and duration timing module is connected to the switch sensing unit 400 and is used to determine whether the switch control signal is a valid switch control signal. In this embodiment, the switch control signal is a magnetic induction pulse signal. The system determines whether the duration of the high or low potential of the magnetic induction pulse signal reaches a set time. When the switch sensing unit 400 outputs a high potential pulse, if the high potential duration reaches the set time, it is determined to be a valid switch control signal; if the high potential duration is too short, it is determined to be interference noise and is an invalid switch control signal, which is then filtered out. When the switch sensing unit 400 outputs a low potential pulse, if the low potential duration reaches the set time, it is determined to be a valid switch control signal; if the low potential duration is too short, it is determined to be interference noise and is an invalid switch control signal, which is then filtered out.

[0056] The effective signal counting module is connected to the signal level judgment and duration timing module, and is used to calculate the number of magnetic induction pulse signals within a set time interval and to count the number of pulses. It is understood that the set time can be 1 second or other set time intervals according to actual needs.

[0057] The switch control execution module is connected to the effective signal counting module and the state storage module. It is used to change the working state of the entire acquisition station stored in the state storage module according to the number of pulses, and generate corresponding control signals to control the power supply unit 200 to power on or power off the seismic detection and acquisition unit 300. When the count equals the first set number, the working state of the seismic acquisition station is changed to the power-on state and stored, and the power supply unit 200 is controlled to power on the seismic detection and acquisition unit 300; when the count equals the second set number, the working state of the seismic acquisition station is changed to the power-off state and stored, and the power supply unit 200 is controlled to power off the seismic detection and acquisition unit 300.

[0058] In this embodiment, the magnetic induction pulse signal that is determined to be a valid signal by the signal level judgment and duration timing module is digitally filtered to obtain a pulse level that changes from low level to high level and then from high level to low level. This is then determined to be a pulse signal. The embedded processor counts the number of magnetic induction pulse signals detected within a preset detection time interval.

[0059] When the seismic data acquisition station is in sleep mode, if the number of pulses detected by the embedded processor matches the preset magnetic induction pulse value, the embedded processor confirms that it is a power-on signal, issues a power-on control command, and connects the power supply unit 200 of the seismic data acquisition station. The seismic data acquisition station enters working mode from sleep mode, sets and saves the working status flag, and drives the LED light to flash to indicate that the power is on through the indicator unit 140. If the number of magnetic induction trigger pulse signals received within the preset detection time interval does not match the preset number of magnetic induction trigger signals, it is judged as external interference, and the trigger signal is not responded to to avoid accidental power-on operation.

[0060] When the seismic data acquisition station is in the power-on working mode, if the number of pulses detected by the embedded processor matches the preset magnetic induction pulse value, the embedded processor issues a power-off control command to put the seismic data acquisition station from the working mode into the sleep mode. The sleep state flag is set and saved, and the LED light is driven by the indicator unit 140 to flash to indicate that the power is off. If the number of magnetic induction trigger pulse signals received within the preset detection time interval does not meet the preset number of magnetic induction trigger signals, it is judged as electromagnetic external interference, and the magnetic induction trigger signal is not responded to to avoid misoperation.

[0061] Regardless of whether the device is powered on or off, the number of input pulse signals within the preset detection time interval is an integer ranging from 1 to n. The preset detection time interval can be 1 second or other time interval values.

[0062] The preset detection time interval and the number of input pulses within the preset detection time interval can be set independently for both power-on and power-off modes without affecting each other. Different power-on / off combinations can be easily preset using different detection time interval values ​​and different combinations of input pulses.

[0063] In another specific embodiment of the seismic data acquisition station, it includes a power supply unit 200, a seismic detection and acquisition unit 300, a switch control unit 500, and a switch sensing unit 400, etc. The power supply unit 200, the seismic detection and acquisition unit 300, etc., can refer to the previous embodiment.

[0064] In this embodiment, the switch sensing unit 400 can be adopted Figure 3 or Figure 4 Implementation methods, such as Figure 3 As shown, the switch sensing unit 400 includes a magnetoresistive sensor 411 (such as the SM3xxLT series) and a signal conditioning circuit 421 (such as the SN74AUP1G04); Figure 4As shown, another embodiment of the switch sensing unit 400 includes a Hall sensor IC circuit 412 (such as MLX90248) and a signal conditioning circuit 422 (such as SN74AUP1G04). In this circuit, one end of the resistor R of the Hall sensor IC circuit 412 is connected to the positive terminal V+ of the power supply, and the other end of the resistor R is connected to the output terminal of the Hall sensor IC circuit 412. The output terminal is connected to capacitor C2 to the negative terminal V- of the power supply. One end of capacitor C1 is connected to the positive terminal V+ of the power supply, and the other end of capacitor C1 is connected to the negative terminal V- of the power supply. The output terminal of the Hall sensor IC circuit 412 outputs a signal to the signal conditioning circuit SN74AUP1G04.

[0065] In this embodiment, the switch control unit 500 uses an STM32F2xx series chip, but it can also use an STM32F3xx, STM32F4xx series chip, or other embedded chips with similar functions.

[0066] The switch sensing unit 400, switch control unit 500, earthquake detection and acquisition unit 300, power supply unit 200, and indicator unit are all mounted on the same PCB board. The rechargeable battery pack 210 of the power supply unit 200 supplies power to the switch sensing unit 400, switch control unit 500, and earthquake detection and acquisition unit 300 through the power management circuit 220. The earthquake detection and acquisition unit 300 and indicator unit operate under the control of the switch control unit 500, which can also control the power management circuit 220 to charge the rechargeable battery pack 210.

[0067] In this embodiment, the working process is as follows:

[0068] After the seismic data acquisition station is equipped with a battery, the switch control unit 500 initializes each unit inside the seismic data acquisition station. After completing the setting operation, it sets and saves the sleep mode flag, and the seismic data acquisition station enters sleep mode under the control of the switch control unit 500.

[0069] When the seismic data acquisition station is in sleep mode, if a permanent magnet approaches the magnetoresistive sensor 411, the output of the magnetoresistive sensor 411 goes low; if the permanent magnet moves away from the magnetoresistive sensor 411, the output of the magnetoresistive sensor 411 goes high, generating a trigger signal. The trigger signal from the magnetoresistive sensor 411 is processed by the signal conditioning circuit 421, which outputs a magnetic induction pulse signal (i.e., a switch control signal). When the external permanent magnet repeatedly approaches and moves away from the magnetoresistive switching element, the magnetic induction unit eventually outputs a series of changing magnetic induction pulse signals, which are then output to the input signal detection terminal of the embedded chip STM32F2xx. The embedded chip STM32F2xx then... Figure 5The program flow detection involves the embedded STM32F2xx chip detecting the magnetic induction pulse signal output from the magnetic induction sensing unit via a trigger signal detection terminal. If the number of magnetic induction pulse signals reaches a preset number (e.g., 2) within a preset 2-second detection interval, the embedded STM32F2xx chip confirms that the input magnetic induction pulse signal is the preset power-on signal. It then drives the LED of the indicator unit to flash slowly for 5 seconds, prompting the operator to power on the seismic data acquisition station. This power-on process connects the power to each unit of the seismic data acquisition station, controls the seismic data acquisition station to enter working mode, sets and saves the working mode flag, and the seismic data acquisition station performs data acquisition, storage, and transmission according to the various commands issued by the embedded STM32F2xx chip program.

[0070] The preset detection time interval of the embedded chip STM32F2xx is in seconds, and can also be other values ​​other than 2 seconds. The number of magnetic induction pulse signals within the preset detection time interval can also be other integer values ​​other than 2.

[0071] When the seismic data acquisition station is in working mode, once an external permanent magnet approaches the magnetoresistive sensor 411, the magnetoresistive sensor 411 will output a trigger signal. After the trigger signal of the magnetoresistive sensor 411 is processed by the signal conditioning circuit 420, a magnetic induction signal is output. As the external permanent magnet repeatedly approaches and moves away from the magnetoresistive sensor 411, the magnetic induction sensing unit eventually outputs a series of magnetic induction pulse signals (i.e., switch control signals) with varying levels of intensity. These signals are then output to the input signal detection terminal of the embedded chip STM32F2xx. The embedded chip STM32F2xx then... Figure 5 The program flow involves detecting the magnetic induction pulse signal output from the magnetic induction unit via a trigger signal detection terminal. If the number of magnetic induction pulse signals reaches a preset number (e.g., 3 times) within a preset 2-second detection interval, the embedded chip STM32F2xx confirms it as a power-off signal, drives the LED of the indicator unit to flash rapidly for 5 seconds, prompting the operator to turn off the power to the seismic data acquisition station, shut down the power to the data acquisition unit, storage unit, and other units of the seismic data acquisition station, control the seismic data acquisition station to stop working, set and save the sleep mode flag, and the seismic data acquisition station enters sleep mode.

[0072] The preset detection time interval of the STM32F2xx embedded chip is in seconds, and it can also be a different time interval value other than 2 seconds. The preset number of changes of the magnetic induction trigger signal can also be an integer value other than 3.

[0073] When encountering strong magnetic field interference at the seismic exploration site, the magnetoresistive sensor 411 will output a sensing signal. Since the intensity and duration of the magnetic interference signal are irregular, the interference signal is filtered out by the embedded chip STM32F2xx digital filtering process, which improves the anti-interference capability and ensures the reliable connection and disconnection of the power supply of the seismic data acquisition station.

[0074] Figure 2 The block diagram of the working principle of the seismic data acquisition station shown below uses... Figure 4 The block diagram of the Hall element magnetic induction unit circuit principle describes its working process and application when used as a magnetic induction unit. Figure 3 The block diagram of the magnetic induction unit circuit principle is similar to the working process of the magnetic induction unit.

[0075] When the seismic data acquisition station is in sleep mode (or working mode), if a permanent magnet approaches the Hall sensor MLX90248, the Hall sensor output goes low. When the permanent magnet moves away from the Hall sensor MLX90248, the Hall sensor output goes high. The trigger signal from the Hall sensor MLX90248 is processed by the signal conditioning circuit 422, which outputs a magnetic induction pulse signal (i.e., a switch control signal). As the permanent magnet repeatedly approaches and moves away from the magnetoresistive switch element, the magnetic induction unit eventually outputs a series of changing magnetic induction pulse signals, which are then output to the input signal detection terminal of the embedded chip STM32F2xx. The embedded chip STM32F2xx then... Figure 5 The process involves the embedded STM32F2xx chip detecting the magnetic induction pulse signal output from the magnetic induction unit via a trigger signal detection terminal. If the number of magnetic induction pulse signals is a preset number (e.g., 2) within a preset 2-second detection interval, the embedded STM32F2xx chip confirms that the input magnetic induction pulse signal is a preset power-on (or power-off) signal. It then drives the LED of the indicator unit to flash slowly for 5 seconds, prompting the operator to turn the power on (or off) the seismic data acquisition station. The operator then turns on (or turns off) the power to each unit of the seismic data acquisition station, controls the seismic data acquisition station to enter working mode (or sleep mode), sets and saves the working mode (sleep mode) flag, and performs data acquisition, storage, and transmission (or stops working) according to the commands issued by the embedded STM32F2xx chip program.

[0076] Similarly, at the seismic exploration site, when encountering strong electromagnetic interference, the Hall sensor MLX90248 will output a sensing signal. Since the intensity and duration of electromagnetic interference signals are unpredictable, the interference signals are filtered out by the embedded chip STM32F2xx digital filtering process, which improves the anti-interference capability and ensures the correct and reliable connection and disconnection of the power supply of the seismic data acquisition station.

[0077] In one embodiment of the seismic data acquisition system, the system includes a seismic data acquisition station as described in any of the above embodiments, and a signal triggering element separate from the seismic data acquisition station. It is understood that there can be multiple seismic data acquisition stations, arranged according to the specific seismic monitoring environment, and any of the seismic data acquisition stations described in any of the above embodiments can be selected.

[0078] The signal trigger can be carried by any person and, when it approaches the switch sensing unit 400 of the seismic data acquisition station, the switch sensing unit 400 senses it and generates a switch control signal. In this embodiment, the signal trigger includes a permanent magnet, and the switch sensing unit 400 includes a magnetic induction sensor 410. When the permanent magnet approaches the magnetic induction sensor 410, an induction signal is generated. The magnetic induction signal is processed by the signal conditioning circuit 420 to generate a trigger pulse signal, which is then output to the detection input terminal of the embedded processor.

[0079] like Figure 5 The diagram shown is a flowchart illustrating one embodiment of the power-on / off control method for an earthquake data acquisition station. The earthquake data acquisition station can be any of the acquisition stations described in the above embodiments. The power-on / off method includes the following steps:

[0080] The system records the operational status of the seismic data acquisition station. After the seismic data acquisition station is powered on, the switch control unit 500 controls the entire seismic data acquisition station to enter sleep mode and records its operational status as "power off". When an external permanent magnet approaches the magnetic induction sensor 410, the magnetic induction unit generates a trigger signal, waking up the switch control unit 500. According to the preset power-on mode, the switch control unit 500 connects the power supply unit 200 inside the seismic data acquisition station, and the seismic data acquisition station enters the operational mode, recording its operational status as "power on". If it is already in the power-on state, it shuts down according to the preset mode, enters sleep mode, and records its operational status as "power off".

[0081] A switch control signal is sensed and generated. In this embodiment, the magnetic intensity signal of an external magnet is sensed by the magnetic induction sensor 410 built into the seismic data acquisition station. When the magnetic intensity signal is greater than a preset value, a trigger signal is generated. A switch control signal is generated based on the trigger signal. Specifically, multiple trigger signals are generated when the external magnet approaches the magnetic induction sensor 410 multiple times. The signal conditioning circuit 420 conditions the magnetic induction trigger signals to generate multiple trigger pulse signals as switch control signals and sends them to the switch control unit 500 (step S501).

[0082] The operating state of the seismic acquisition station is changed and stored according to the switch control signal, thereby controlling the power supply unit 200 to supply power to or stop supplying power to the seismic detection and acquisition unit 300. In this embodiment, the switch control signal is a magnetic induction pulse signal. By determining whether the high or low potential duration of the magnetic induction pulse signal reaches a set time, it is determined whether noise signal is generated.

[0083] Then, it is determined whether the switch control signal is a valid signal (step S502): when the output pulse of the switch sensing unit 400 is at a high potential, it is determined that the high potential duration reaches the set time and is therefore a valid switch control signal; when the high potential duration is too short, it is determined to be interference noise and is therefore an invalid switch control signal, and is filtered out. When the output pulse of the switch sensing unit 400 is at a low potential, it is determined that the low potential duration reaches the set time and is therefore a valid switch control signal; when the low potential duration is too short, it is determined to be interference noise and is therefore an invalid switch control signal, and is filtered out.

[0084] Then, determine whether the number of pulse signals of the switch control signal has reached the set number (step S503).

[0085] In this embodiment, the magnetic induction pulse signal that is determined to be a valid signal by the signal level judgment and duration timing module is digitally filtered to obtain a pulse level that changes from low level to high level and then from high level to low level. This is then determined to be a pulse signal. The embedded processor counts the number of magnetic induction pulse signals detected within a preset detection time interval.

[0086] When the number of counts equals the first set number, the working state of the seismic acquisition station is changed to the power-on state and stored, and the power supply unit 200 is controlled to supply power to the seismic detection and acquisition unit 300; when the number of counts equals the second set number, the working state of the seismic acquisition station is changed to the power-off state and stored, and the power supply unit 200 is controlled to cut off power to the seismic detection and acquisition unit 300.

[0087] Specifically: Detect the working status flag of the seismic data acquisition station (step S504); when the seismic data acquisition station is in power-off sleep mode (step S505), if the number of pulses detected by the embedded processor matches the preset magnetic induction pulse value, the embedded processor confirms it is a power-on signal, issues a power-on control command, connects the power supply unit 200 of the seismic data acquisition station, the seismic data acquisition station enters working mode from sleep mode, sets and saves the working status flag (step S506), and drives the LED light through the indicator unit to flash to indicate that the power is on and the station has entered working state. The seismic data acquisition station then performs data acquisition, storage, transmission, and other tasks (step S507); if the number of magnetic induction trigger pulse signals received within the preset detection time interval does not match the preset number of magnetic induction trigger signals, it is judged as external interference, and the trigger signal is not responded to to avoid accidental power-on operation.

[0088] When the seismic data acquisition station is in the power-on working mode (step S508), if the number of pulses detected by the embedded processor matches the preset magnetic induction pulse value, the embedded processor issues a power-off control command to make the seismic data acquisition station enter the sleep mode from the working mode, sets and saves the sleep state flag (step S509), and drives the LED light through the indicator unit to flash to indicate that the power is off, and the seismic data acquisition station enters the hibernation state (step S510).

[0089] If the number of magnetic induction trigger pulse signals received within the preset detection time interval does not meet the predetermined number of magnetic induction trigger signals, it is judged as electromagnetic external interference, and the magnetic induction trigger signal is not responded to, thus avoiding misoperation.

[0090] Regardless of whether the device is powered on or off, the number of input pulse signals within the preset detection time interval is an integer ranging from 1 to n. The preset detection time interval can be 1 second or other time interval values.

[0091] The preset detection time interval and the number of input pulses within the preset detection time interval can be set independently for both power-on and power-off modes without affecting each other. Different power-on / off combinations can be easily preset using different detection time interval values ​​and different combinations of input pulses.

[0092] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of the present invention, still fall within the scope of the invention.

Claims

1. A smart, controllable switch-based seismic data acquisition station, comprising a sealed enclosure, a power supply unit disposed within the sealed enclosure, and a seismic detection and acquisition unit powered by the power supply unit; characterized in that, The seismic data acquisition station also includes a switch control unit and a switch sensing unit housed within the sealed enclosure; wherein... The switch sensing unit is electrically connected to the switch control unit and is used to sense and generate a switch control signal and transmit it to the switch control unit. The switch sensing unit includes a magnetic induction sensing unit, which is used to sense and generate the switch control signal when an external magnet is close. The magnetic induction sensing unit includes a magnetic induction sensor and a signal conditioning circuit connected to the magnetic induction sensor. The magnetic induction sensor is used to generate multiple trigger signals when an external magnet is sensed to approach multiple times, and sends them to the signal conditioning circuit. The signal conditioning circuit is connected to the switch control unit and is used to condition multiple trigger signals to generate multiple trigger pulse signals, which are then sent to the switch control unit as the switch control signals. The switch control unit is electrically connected to the switch sensing unit, the earthquake detection and acquisition unit and the power supply unit, and is used to control the power supply unit to supply power to the earthquake detection and acquisition unit or to stop supplying power to the earthquake detection and acquisition unit according to the switch control signal. The switch control unit includes a signal level judgment and duration timing module, a valid signal counting module, a state storage module, and a switch control execution module; the signal level judgment and duration timing module is connected to the switch sensing unit and is used to determine whether the switch control signal is a valid switch control signal; the switch control signal is a magnetic induction pulse signal; Whether the switch control signal is a valid switch control signal includes: determining whether the duration of the high or low potential of the magnetic induction pulse signal reaches a set time; if so, it is determined to be a valid switch control signal; if the duration of the high potential is too short, it is determined to be interference noise and is an invalid switch control signal, and is filtered out.

2. The seismic data acquisition station according to claim 1, characterized in that, The magnetic induction sensor includes one or more of the following: magnetoresistive element, Hall element, and reed switch.

3. A seismic data acquisition system, characterized in that, It includes a seismic data acquisition station as described in any one of claims 1-2, and a signal triggering element separate from the seismic data acquisition station; the switch sensing unit of the seismic data acquisition station senses the signal triggering element and generates a switch control signal.

4. The seismic data acquisition system according to claim 3, characterized in that, The signal trigger includes a permanent magnet.

5. A method for controlling the power on / off of a seismic data acquisition station, applied to the seismic data acquisition station according to any one of claims 1-2, characterized in that, Includes the following steps: S1: Records the working status of the seismic data acquisition station; S2: Sensing and generating a switch control signal, which includes: S2-1: Sensing magnetic intensity signal; The magnetic intensity signal generated when the external magnet approaches multiple times is sensed by the magnetic induction sensor built into the seismic data acquisition station; S2-2: When the magnetic intensity signal is greater than a preset value, multiple trigger signals are generated; S2-3: Condition the multiple trigger signals to generate multiple trigger pulse signals, and use them as the switch control signals; S3: Change and store the operating state of the seismic data acquisition station according to the switch control signal, so as to control the power supply unit to supply power to or stop supplying power to the seismic detection and acquisition unit, wherein changing and storing the operating state of the seismic data acquisition station according to the switch control signal includes: S3-1: Determining whether the switch control signal is a valid switch control signal includes: the switch control signal is a magnetic induction pulse signal; if the duration of the high potential or low potential of the magnetic induction pulse signal reaches a set time, it is determined to be a valid switch control signal; if the duration of the high potential is too short, it is determined to be interference noise and is an invalid switch control signal, and is filtered. S3-2: Within a set time interval, count the number of valid switch control signals; S3-3: When the number of times equals the set number of times, change and store the working status of the seismic data acquisition station.

6. The seismic data acquisition station power-on / off control method according to claim 5, characterized in that, In step S3-2, the number of pulses of the magnetic induction pulse signal is calculated within a set time interval, and the number of pulses is counted. In step S3-3, when the number of times equals the first set number of times, the working state of the seismic data acquisition station is changed to the power-on state and stored, and the power supply unit is controlled to supply power to the seismic detection and acquisition unit; when the number of times equals the second set number of times, the working state of the seismic data acquisition station is changed to the power-off state and stored, and the power supply unit is controlled to cut off power to the seismic detection and acquisition unit.

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