CN110907985A - Earthquake data acquisition station and system of intelligent controllable switch and startup and shutdown control method - Google Patents

Abstract

The invention relates to a seismic data acquisition station with an intelligent controllable switch, an acquisition system and a startup and shutdown control method. The acquisition station comprises a closed shell, a power supply unit arranged in the closed shell and an earthquake detection acquisition unit powered by the power supply unit; the earthquake data acquisition station is characterized by also comprising a switch control unit and a switch induction unit which are arranged in the closed shell; the switch induction unit is electrically connected with the switch control unit and used for sensing and generating a switch control signal and transmitting the switch control signal to the switch control unit; the switch control unit is electrically connected with the switch induction unit, the earthquake detection and acquisition unit and the power supply unit and is used for controlling the power supply unit to supply power or stop supplying power to the earthquake detection and acquisition unit according to the switch control signal. The invention avoids the defects caused by the need of arranging an external switch in the prior art, and has the advantages of simple and convenient operation, high reliability and the like.

Description

Earthquake data acquisition station and system of intelligent controllable switch and startup and shutdown control method

Technical Field

The invention relates to the technical field of earthquake detection, in particular to an earthquake data acquisition station with an intelligent controllable switch, an acquisition system and a startup and shutdown control method.

Background

Seismic data acquisition stations are used for outdoor seismic data acquisition, typically deployed on the ground in a geological exploration area to acquire seismic data. When the device works, the power is supplied by an internal battery power supply, and the internal battery power supply needs to be turned off when the device is in non-working states such as storage and transportation stages after production, manufacturing and inspection are finished. When data are collected in the earthquake field, the power supply of the earthquake data collecting station is required to be started or closed according to the working mode of data collection (sometimes the power supply is required to be started and shut down every day).

The earthquake data acquisition station is arranged on the ground during geological exploration (several days or even dozens of days), is exposed to the sun, rain, frost and snow, has a very bad working environment, and is required to bear rolling and falling of a certain height (usually one meter).

Disclosure of Invention

The invention aims to provide a seismic data acquisition station with an intelligent controllable switch.

The invention aims to solve another technical problem of providing a seismic data acquisition system with an intelligent controllable switch.

Another technical problem to be solved by the present invention is to provide a method for controlling the start-up and shut-down of a seismic data acquisition station.

The technical scheme adopted by the invention for solving the technical problems is as follows: the earthquake data acquisition station comprises a closed shell, a power supply unit arranged in the closed shell and an earthquake detection acquisition unit powered by the power supply unit; the seismic data acquisition station also comprises a switch control unit and a switch induction unit which are arranged in the closed shell; wherein the content of the first and second substances,

the switch induction unit is electrically connected with the switch control unit and used for sensing and generating a switch control signal and transmitting the switch control signal to the switch control unit;

the switch control unit is electrically connected with the switch induction unit, the earthquake detection acquisition unit and the power supply unit and is used for controlling the power supply unit to supply power or stop supplying power to the earthquake detection acquisition unit according to the switch control signal.

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

Preferably, the magnetic induction sensing unit comprises a magnetic induction sensor and a signal conditioning circuit connected with the magnetic induction sensor;

the magnetic induction sensor is used for generating a trigger signal when the sensed external magnet approaches and sending the trigger signal to the signal conditioning circuit;

the signal conditioning circuit is connected with the switch control unit and used for conditioning the trigger signal to generate the switch control signal and send the switch control signal to the switch control unit.

Preferably, the magnetic induction sensor comprises one or more of a magnetic resistance element, a hall element and a reed switch.

The invention also provides a seismic data acquisition system, which comprises the seismic data acquisition station and a signal trigger part separated from the seismic data acquisition station; and a switch sensing unit of the seismic data acquisition station senses the signal trigger and generates a switch control signal.

Preferably, the signal trigger member comprises a permanent magnet.

The invention also provides a method for controlling the startup and shutdown of the seismic data acquisition station, which comprises the following steps:

s1: recording the working state of the seismic data acquisition station;

s2: sensing and generating a switch control signal;

s3: and changing and storing the working state of the earthquake acquisition station according to the switch control signal so as to control the power supply unit to supply power or stop supplying power to the earthquake detection acquisition unit.

Preferably, the step S2 includes:

s2-1: sensing a magnetic strength signal;

s2-2: when the magnetic strength signal is greater than a preset value, generating a trigger signal;

s2-3: and generating the switch control signal according to the trigger signal.

Preferably, the step S3 includes:

s3-1: judging whether the switch control signal is an effective switch control signal or not;

s3-2: counting the times of the effective switch control signals within a set time interval;

s3-3: and when the times are equal to the set times, changing and storing the working state of the earthquake acquisition station, and controlling the power supply unit to supply power to the earthquake detection acquisition unit or stop supplying power.

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

in the step S3-1, by determining whether the duration of the high potential or the low potential of the magnetic induction pulse signal reaches a set time, if yes, determining that the magnetic induction pulse signal is the active switch control signal;

in the step S3-2, the number of pulses of the magnetic induction pulse signal is calculated within a set time interval, and the number of times is counted;

in the step S3-3, when the number of times is equal to a first set number of times, changing the operating state of the earthquake acquisition station to a power-on state and storing the operating state, and controlling the power supply unit to supply power to the earthquake detection acquisition unit; and when the times are equal to a second set time, changing the working state of the earthquake acquisition station into a shutdown state and storing the shutdown state, and controlling the power supply unit to power off the earthquake detection acquisition unit.

Compared with the prior art, the invention has the following advantages: the switch induction unit arranged in the closed shell senses and generates a switch control signal, and the switch control unit controls the power supply unit to supply power or stop supplying power for the earthquake detection and acquisition unit according to the switch control signal, so that the defect that an external switch needs to be arranged in the prior art is overcome, and the earthquake detection and acquisition device has the advantages of simplicity and convenience in operation, high reliability and the like.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of one embodiment of a seismic data acquisition station of the present invention;

FIG. 2 is a schematic block diagram of one embodiment of a seismic data acquisition station of the present invention;

FIG. 3 is a schematic circuit diagram of a switched inductive unit of one embodiment of a seismic data acquisition station of the present invention;

FIG. 4 is a schematic electrical circuit diagram of a switched inductive unit in another mode of an embodiment of a seismic data acquisition station of the invention;

FIG. 5 is a flow chart of a method for controlling the startup and shutdown of a seismic data acquisition station according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the seismic data acquisition station according to an embodiment of the present invention includes a sealed housing 100, and a power supply unit 200, a seismic detection acquisition unit 300, a switch control unit 500, a switch sensing unit 400, and the like, which are disposed in the sealed housing 100. The switch control signal is generated by sensing the switch sensing unit 400 arranged in the closed shell 100, and the power supply unit 200 is controlled by the switch control unit 500 according to the switch control signal to supply power or stop supplying power to the earthquake detection and acquisition unit 300, so that the defects caused by the need of arranging an external switch in the prior art are overcome, and the earthquake detection and acquisition device has the advantages of simplicity and convenience in operation, high reliability and the like.

As shown, the hermetic case 100 includes an upper case 110, a lower case 120; the upper case 110 and the lower case 120 may be combined to form a closed whole, thereby achieving waterproof sealing of internal circuits, devices, etc. thereof. In this embodiment, the upper housing 110 and the lower housing 120 are detachable structures, and various existing waterproof sealing structures may be disposed between the two. It is understood that in other embodiments, the upper housing 110 and the lower housing 120 may be non-detachable, so as to form a complete sealing body.

Further, in order to facilitate the fixed installation of the seismic data acquisition station to a suitable acquisition site, a detachable fixed cone assembly 130 or the like may be further provided at the lower portion of the hermetic enclosure 100, and the entire seismic data acquisition station may be installed to a suitable site using the fixed cone assembly 130. It will be appreciated that the seismic data acquisition station may be installed in any of a variety of known installation manners without the use of the stationary cone assembly 130, provided that the seismic data acquisition station is fixedly installed.

A power supply unit 200, an earthquake detection and collection unit 300, a switch control unit 500, a switch sensing unit 400, and the like are mounted in the sealed case 100. In the present embodiment, the power supply unit 200 is installed in the lower housing 120, the earthquake detection acquisition unit 300, the switch control unit 500, the switch sensing unit 400 and the like are installed in the upper housing 110, and the power supply unit 200 supplies power to the earthquake detection acquisition unit 300, the switch control unit 500, the switch sensing unit 400 and the like through the terminal assembly, and the split arrangement facilitates operations such as charging, data reading and the like. It can be understood that the arrangement of the power unit 200, the seismic acquisition unit 300, the switch control unit 500, the switch sensing unit 400, and the like can also be adjusted according to actual needs.

The power supply unit 200 supplies power to the entire seismic data acquisition station, and includes a rechargeable battery pack 210, a power management circuit 220, and the like. In the present embodiment, the rechargeable battery pack 210 is disposed in the lower case 120, and the power management circuit 220 is disposed in the upper case 110, electrically connected by contact terminals. The power management circuit 220 may be disposed on the same circuit board as the earthquake detection and collection unit 300, the switch sensing unit 400, the switch control unit 500, and the like, and is fixedly installed in the upper housing 110, so as to transmit signals and data through a communication interface and the like.

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

The power management circuit 220 is electrically connected to the earthquake detection acquisition unit 300, the switch sensing unit 400, the switch control unit 500, and the like, and converts the power of the rechargeable battery pack 210 to supply power to the earthquake detection acquisition unit 300, the switch sensing unit 400, and the switch control unit 500. It is understood that the power management circuit 220 may include an operational power supply module and a standby operational module. The working power supply module is connected with the earthquake detection and acquisition unit 300 so as to connect the rechargeable battery pack 210 to supply power to the earthquake detection and acquisition unit 300 under a normal working state; the standby working module is connected with the switch sensing unit and the switch control unit 500, so that in a standby state, the rechargeable battery pack 210 is switched on to supply power to the switch sensing unit and the switch control unit 500, the power consumption of the whole collection station is reduced, and the service life is prolonged; and after receiving the switch control signal, the working power supply module is triggered to enter a normal working state to supply power to the earthquake detection acquisition unit 300. Of course, the rechargeable battery pack 210 may also employ one or more sets of rechargeable and/or non-rechargeable batteries to provide power under different conditions.

Further, the seismic data acquisition station may also be provided with an indication unit 140 within the closed housing 100. In some embodiments, the indication unit 140 may include an LED lamp and a driving circuit. And indicating the working state of the seismic data acquisition station through an LED lamp. Of course, in some embodiments, the indication unit may also be omitted.

In this embodiment, the earthquake detection and collection unit 300 includes a geophone, a data collection unit, a control unit, a storage unit, a communication interface unit, and the like, and may be disposed on the same or different circuit boards and installed in the sealed housing 100 to implement the earthquake detection and collection operation. The geophone is arranged at the bottom inside the shell of the seismic data acquisition station, senses and detects seismic waves, converts the seismic waves into corresponding electric signals and outputs the electric signals to the data acquisition unit. It is to be understood that the seismic acquisition unit 300 may employ various existing acquisition schemes without limitation.

The switch sensing unit 400 and the switch control unit 500 are also disposed in the sealed housing 100, and are used for controlling the power supply unit 200 to supply power to the earthquake detection and acquisition unit 300 or stop supplying power. The switch sensing unit 400 is electrically connected to the switch control unit 500, and is configured to sense and generate a switch control signal to be transmitted to the switch control unit 500. The switch control unit 500 is electrically connected to the switch sensing unit 400, the earthquake detection and acquisition unit 300 and the power supply unit 200, and is used for controlling the power supply unit 200 to supply power to the earthquake detection and acquisition unit 300 or stop supplying power according to the switch control signal.

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

The magnetic induction sensor 410 is used for generating a trigger signal when the sensed external magnet approaches, and sending the trigger signal to the signal conditioning circuit 420. The magnetic induction sensor 410 includes one or more of a magnetic resistance element, a hall element, and a reed switch. The magnetic induction sensor 410 senses a magnetic strength signal of an external magnet, and generates a trigger signal when the magnetic strength signal is greater than a preset value, so that the technical solutions of shell sealing, water and moisture prevention, electric leakage prevention and short circuit prevention brought to the seismic data acquisition station by a conventional contact switch are simplified, and compared with a wireless remote control scheme, the magnetic induction sensor has the advantages of simple circuit, low cost, simplicity and convenience in operation and good anti-interference performance.

The signal conditioning circuit 420 is connected to the switch control unit 500, and is configured to condition the trigger signal to generate a switch control signal and send the switch control signal to the switch control unit 500. In this embodiment, when the external magnet approaches the magnetic induction sensor 410 multiple times, a plurality of trigger signals are generated, and the signal conditioning circuit 420 conditions the magnetically induced trigger signals to generate a plurality of trigger pulse signals as the switch control signals, and sends the trigger pulse signals to the switch control unit 500. And the switch control unit 500 judges whether the power supply unit 200 meets a preset switching rule or not, so as to control the power supply unit 200 to supply power to the earthquake detection and acquisition unit 300 or stop supplying power.

The switch control unit 500 is electrically connected to the switch sensing unit 400, the earthquake detection and acquisition unit 300 and the power supply unit 200, and is used for controlling the power supply unit 200 to supply power to the earthquake detection and acquisition unit 300 or stop supplying power according to the switch control signal. In this embodiment, the switch control unit 500 may adopt an embedded processor, such as an embedded chip STM32F2xx, an STM32F3xx, an STM32F4xx chip series, or other embedded chips with similar functions. In the seismic exploration field, when strong magnetic field interference occurs, the switch sensing unit 400 outputs sensing signals, and because the strength and the duration of the magnetic interference signals are irregular, the interference signals are filtered out through digital filtering processing of the switch control unit 500, the anti-interference capability is improved, and reliable connection and disconnection of a seismic data acquisition station power supply are ensured.

The switch control unit 500 includes a signal level determination and duration timing module, an effective signal counting module, a state storage module, and a switch control execution module. The signal level determination and duration timing module is connected to the switch sensing unit 400, and is configured to determine whether the switch control signal is an active switch control signal. In this embodiment, the switch control signal is a magnetic induction pulse signal. Whether the duration time of the high potential or the low potential of the magnetic induction pulse signal reaches the set time is judged. When the output pulse of the switch sensing unit 400 is a high potential, judging that the duration time of the high potential reaches the set time and judging that the high potential is an effective switch control signal; when the duration time of the high potential is too short, the high potential is judged as interference clutter, and is an invalid switch control signal, and filtering is carried out; when the pulse output by the switch sensing unit 400 is at a low potential, the switch sensing unit judges that the low potential duration reaches a set time and then judges that the switch sensing unit is a valid switch control signal; when the duration of the low potential is too short, the noise wave is judged to be interference noise wave, and the noise wave is an invalid switch control signal to carry out filtering processing.

The effective signal counting module is connected with the signal level judging and duration timing module and is used for calculating the pulse quantity of the magnetic induction pulse signals within a set time interval and counting the times. It is understood that the set time may be 1 second or other set time interval set according to actual needs.

The switch control execution module is connected with the effective signal counting module and the state storage module, and is used for changing the working state of the whole acquisition station stored by the state storage module according to the pulse times and correspondingly generating a control signal to control the power supply unit 200 to supply power or cut off power for the earthquake detection acquisition unit 300. When the counted times are equal to the first set times, the working state of the earthquake acquisition station is changed into a starting state and stored, and the power supply unit 200 is controlled to supply power to the earthquake detection acquisition unit 300; and when the times are equal to a second set time, changing the working state of the earthquake acquisition station into a shutdown state and storing the shutdown state, and controlling the power supply unit 200 to power off the earthquake detection acquisition unit 300.

In this embodiment, the pulse level obtained after the magnetic induction pulse signal determined as the effective signal by the signal level determination and duration timing module is digitally filtered is changed from a low level to a high level, and then from the high level to the low level, and is determined as a pulse signal, and the embedded processor counts the number of the magnetic induction pulse signals detected and received within a preset detection time interval.

When the seismic data acquisition station is in a shutdown sleep mode, if the pulse number detected by the embedded processor accords with a preset magnetic induction pulse numerical value, the embedded processor confirms that the signal is a startup signal, sends a startup control command, and switches on a power supply unit 200 of the seismic data acquisition station, the seismic data acquisition station enters a working mode from the sleep mode, sets a working state mark and stores the working state mark, drives an LED lamp through an indicating unit 140 to prompt the power supply to be switched on in a flashing mode, if the number of the magnetic induction trigger pulse signals received in a preset detection time interval does not accord with the preset magnetic induction trigger signal number, the seismic data acquisition station judges that the seismic data acquisition station is external interference, does not respond to the trigger signal, and avoids false startup operation.

When the seismic data acquisition station is in a starting-up working mode, if the pulse number detected by the embedded processor accords with a preset magnetic induction pulse numerical value and accords with a preset numerical value, the embedded processor sends a shutdown control command to enable the seismic data acquisition station to enter a sleep mode from the working mode, a sleep state mark is set and stored, the LED lamp is driven by the indicating unit 140 to prompt the power supply to be turned off in a flashing mode, and if the number of the magnetic induction trigger pulse signals received in a preset detection time interval does not accord with the preset magnetic induction trigger signal number, the electromagnetic external interference is judged, the magnetic induction trigger signals are not responded, and misoperation is avoided.

No matter the mode is a starting mode or a shutdown mode, the frequency range of the input pulse signals in the preset induction trigger signal detection time interval is an integer of 1-n, and the preset detection time interval value can be 1 second or other time interval values.

The preset detection time interval values of the startup mode and the shutdown mode and the input pulse number in the preset detection time interval can be independently set without mutual influence, and different startup and shutdown combination modes can be conveniently preset through different detection time interval values and different input pulse number combinations.

In another embodiment of the seismic data acquisition station, the seismic data acquisition station comprises a power supply unit 200, a seismic detection acquisition unit 300, a switch control unit 500, a switch sensing unit 400 and the like. The power supply unit 200, the seismic acquisition unit 300, and the like refer to the previous embodiment.

In this embodiment, the switching sensing unit 400 may adopt the embodiment of fig. 3 or fig. 4, as shown in fig. 3, the switching sensing unit 400 includes a magnetoresistive sensor 411 (e.g., SM3xxLT series), a signal conditioning circuit 421 (e.g., SN74AUP1G 04); as shown in fig. 4, another embodiment of the switch sensing unit 400 includes a hall sensor IC circuit 412 (e.g., MLX 90248), and a signal conditioning circuit 422 (e.g., SN74AUP1G 04). One end of a resistor R of the Hall sensor IC circuit 412 is connected with a power supply anode V +, the other end of the resistor R is connected with the output end of the Hall sensor IC circuit 412, the output end of the resistor R is connected with a capacitor C2 to a power supply cathode V-, one end of a capacitor C1 is connected with the power supply anode V +, the other end of the capacitor C1 is connected with the power supply cathode V-, and the output end of the Hall sensor IC circuit 412 outputs a signal to a signal conditioning circuit SN74AUP1G 04.

The switch control unit 500 of the present embodiment uses an STM32F2xx series chip, and may also use an STM32F3xx, an STM32F4xx series chip, or other embedded chips with similar functions.

The switch sensing unit 400, the switch control unit 500, the earthquake detection acquisition unit 300, the power supply unit 200, the indicating unit and the like are all installed on the same PCB. The rechargeable battery pack 210 of the power supply unit 200 supplies power to the switching induction unit 400, the switching control unit 500, the earthquake detection acquisition unit 300 and the like through the power management circuit 220, the earthquake detection acquisition unit 300, the indication unit and the like operate under the control of the switching control unit 500, and the switching control unit 500 can also control the power management circuit 220 to charge the rechargeable battery pack 210.

In this embodiment, the working process is as follows:

after the battery is installed on the seismic data acquisition station, the switch control unit 500 performs initialization setting on each unit inside the seismic data acquisition station, after the setting operation is completed, a sleep mode flag is set and stored, and the seismic data acquisition station enters a sleep mode under the control of the switch control unit 500.

When the seismic data acquisition station is in a sleep mode, once a permanent magnet approaches the magnetoresistive sensor 411, the output of the magnetoresistive sensor 411 becomes low, the permanent magnet leaves the magnetoresistive sensor 411, the output of the magnetoresistive sensor 411 becomes high, and a trigger signal is generated; the sensing trigger signal of the magnetic resistance sensor 411 is processed by the signal conditioning circuit 421, and then outputs a magnetic induction pulse signal (i.e., a switch control signal); when an external permanent magnet continuously and repeatedly approaches to and leaves the reluctance switch element, the magnetic induction unit is finally caused to output a series of changed magnetic induction pulse signals to an input signal detection end of the embedded chip STM32F2xx, the embedded chip STM32F2xx detects according to the program flow of FIG. 5, the embedded chip STM32F2xx detects the magnetic induction pulse signals output by the magnetic induction sensing unit through a trigger signal detection end, and when the number of the magnetic induction pulse signals is preset times (such as 2 times) within a preset detection time interval of 2 seconds, the embedded chip STM32F2xx confirms that the input magnetic induction pulse signals are preset startup signals, drives an LED lamp of an indicating unit to slowly flash for 5 seconds, prompts an operator to switch on a power supply of the seismic data acquisition station, switches on the power supplies of all units of the seismic data acquisition station, and controls the seismic data acquisition station to enter a working mode, and setting and storing a working mode mark, and carrying out data acquisition, storage, transmission and other work by the seismic data acquisition station according to various commands sent by an embedded chip STM32F2xx program.

The detection time interval preset by the embedded chip STM32F2xx is in seconds, or may be preset by the embedded chip STM32F2xx to a value other than 2 seconds, or the number of the magnetic induction pulse signals in the preset detection time interval may be preset by the embedded chip STM32F2xx to an integer value other than 2.

When the seismic data acquisition station is in a working mode, once an external permanent magnet approaches the magnetoresistive sensor 411, the magnetoresistive sensor 411 outputs a trigger signal, the trigger signal of the magnetoresistive sensor 411 is processed by the signal conditioning circuit 420, and then outputs a magnetic induction signal, when the external permanent magnet continuously and repeatedly approaches to and leaves the magnetoresistive sensor 411, finally the magnetic induction sensing unit outputs a series of magnetic induction pulse signals (i.e. a switch control signal) with level changes, and the magnetic induction pulse signals are output to the input signal detection end of the embedded chip STM32F2xx, the embedded chip STM32F2xx detects the magnetic induction pulse signals output by the magnetic induction sensing unit through the trigger signal detection end according to the program flow of fig. 5, and when the number of the magnetic induction pulse signals is preset times (such as 3 times) within a preset detection time interval of 2 seconds, the embedded chip STM32F2xx determines that the electromagnetic induction pulse signals are shutdown signals, the LED lamp of the driving indication unit quickly flickers for 5 seconds to prompt an operator to turn off the power supply of the seismic data acquisition station, the power supplies of units such as a data acquisition unit, a storage unit and the like of the seismic data acquisition station are turned off, the seismic data acquisition station is controlled to stop working, a sleep mode mark is set and stored, and the seismic data acquisition station enters a sleep mode.

The detection time interval preset by the embedded chip STM32F2xx is in seconds, or may be other time interval values than 2 seconds preset by the embedded chip STM32F2xx, or the number of times of change of the preset magnetic induction trigger signal may be other integer values than 3 preset by the embedded chip STM32F2 xx.

When the seismic exploration field encounters strong magnetic field interference, the magnetic resistance sensor 411 outputs induction signals, and the strength and the duration of the magnetic interference signals are irregular, so that the interference signals are filtered out through digital filtering processing of an embedded chip STM32F2xx, the anti-interference capability is improved, and the reliable connection and disconnection of a seismic data acquisition station power supply are ensured.

In the working principle block diagram of the seismic data acquisition station shown in fig. 2, when the circuit principle block diagram of the hall element magnetic induction unit shown in fig. 4 is adopted as the magnetic induction unit, the working process is similar to the working process when the circuit principle block diagram of the magnetic induction unit shown in fig. 3 is adopted as the magnetic induction unit.

When the seismic data acquisition station is in a sleep mode (or a working mode), once an external permanent magnet approaches to the hall sensor MLX90248, the output of the hall sensor becomes low, the permanent magnet leaves from the hall sensor MLX90248, the output of the hall sensor MLX90248 becomes high, a trigger signal of the hall sensor MLX90248 is processed by the signal conditioning circuit 422, a magnetic induction pulse signal (namely a switch control signal) is output, when the external permanent magnet continuously and repeatedly approaches to and leaves from the magnetic resistance switch element, a magnetic induction pulse signal with a series of changes is finally output by the magnetic induction unit and is output to an input signal detection end of the embedded chip STM32F2xx, the embedded chip STM32F2xx performs detection according to the flow of fig. 5, the embedded chip STM32F2xx detects the magnetic induction pulse signal output by the trigger signal detection end, and when the number of the magnetic induction pulse signal is a preset number (such as 2 times) within a preset detection time interval of 2 seconds, the embedded chip STM32F2xx confirms that the input magnetic induction pulse signal is a preset startup (or shutdown) signal, drives an LED lamp of the indicating unit to slowly flash for 5 seconds, prompts an operator to turn on (or turn off) a power supply of the seismic data acquisition station, turns on (or turns on) the power supply of each unit of the seismic data acquisition station, controls the seismic data acquisition station to enter a working mode (or a sleep mode), sets a working mode (sleep mode) mark and stores the working mode (sleep mode) mark, and the seismic data acquisition station performs data acquisition, storage, transmission and other work (or stop work) according to a command sent by an embedded chip STM32F2xx program.

Similarly, in the seismic exploration field, when strong electromagnetic field interference occurs, the Hall sensor MLX90248 outputs induction signals, and because the strength and the duration of the electromagnetic interference signals are irregular, the interference signals are filtered through digital filtering processing of an embedded chip STM32F2xx, the anti-interference capability is improved, and the power supply of the seismic data acquisition station is enabled to be switched on and off correctly and reliably.

In one embodiment of the seismic data acquisition system, the seismic data acquisition system comprises the seismic data acquisition station of any of the embodiments described above, and a seismic data acquisition station-separate signal trigger. It will be appreciated that there may be a plurality of seismic data acquisition stations, and that any of the embodiments of seismic data acquisition stations described above may be used, depending on the particular seismic monitoring environment.

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

Fig. 5 is a schematic flow chart of an embodiment of a method for controlling the startup and shutdown of a seismic data acquisition station. The seismic data acquisition station may adopt the acquisition station of any of the above embodiments. The startup and shutdown method comprises the following steps:

and recording the working state of the seismic data acquisition station. After the seismic data acquisition station is powered on, the switch control unit 500 controls the whole seismic data acquisition station to enter a sleep mode, and records that the working state of the seismic data acquisition station is a shutdown state. When the external permanent magnet is close to the magnetic induction sensor 410, the magnetic induction unit generates a trigger signal to wake up the switch control unit 500, the switch control unit 500 is switched on the power supply unit 200 in the seismic data acquisition station according to a preset startup mode, and the seismic data acquisition station enters a working mode and records that the working state is a startup state; if the mobile phone is in the power-on state, the mobile phone is powered off according to a preset mode, enters a sleep mode, and records that the working state of the mobile phone is the power-off state.

A switch control signal is sensed and generated. In this embodiment, a magnetic induction sensor 410 built in the seismic data acquisition station senses a magnetic strength signal of an external magnet, and generates a trigger signal when the magnetic strength signal is greater than a preset value. The switch control signal is generated according to the trigger signal, specifically, a plurality of trigger signals are generated when the external magnet approaches the magnetic induction sensor 410 for a plurality of times, and the signal conditioning circuit 420 conditions the magnetic induction trigger signal to generate a plurality of trigger pulse signals as the switch control signal, and sends the switch control signal to the switch control unit 500 (step S501).

And changing and storing the working state of the earthquake acquisition station according to the switch control signal so as to control the power supply unit 200 to supply power to the earthquake detection acquisition unit 300 or stop supplying power. In this embodiment, the switch control signal is a magnetic induction pulse signal. Whether the clutter signal is generated is judged by judging whether the duration time of the high potential or the low potential of the magnetic induction pulse signal reaches the set time.

Then, it is judged whether or not the switch control signal is an active signal (step S502): when the output pulse of the switch sensing unit 400 is a high potential, judging that the duration time of the high potential reaches the set time and judging that the high potential is an effective switch control signal; when the duration time of the high potential is too short, the high potential is judged as interference clutter, and is an invalid switch control signal, and filtering is carried out; when the pulse output by the switch sensing unit 400 is at a low potential, the switch sensing unit judges that the low potential duration reaches a set time and then judges that the switch sensing unit is a valid switch control signal; when the duration of the low potential is too short, the noise wave is judged to be interference noise wave, and the noise wave is an invalid switch control signal to carry out filtering processing.

Then, whether the number of pulse signals of the switch control signal reaches the set number of times is judged (step S503);

in this embodiment, the pulse level obtained after the magnetic induction pulse signal determined as the effective signal by the signal level determination and duration timing module is digitally filtered is changed from a low level to a high level, and then from the high level to the low level, and is determined as a pulse signal, and the embedded processor counts the number of the magnetic induction pulse signals detected and received within a preset detection time interval.

When the counted times are equal to the first set times, the working state of the earthquake acquisition station is changed into a starting state and stored, and the power supply unit 200 is controlled to supply power to the earthquake detection acquisition unit 300; and when the times are equal to a second set time, changing the working state of the earthquake acquisition station into a shutdown state and storing the shutdown state, and controlling the power supply unit 200 to power off the earthquake detection acquisition unit 300.

Specifically, the method comprises the following steps: detecting a working state flag of the seismic data acquisition station (step S504); when the seismic data acquisition station is in a shutdown sleep mode (step S505), if the pulse number detected by the embedded processor meets a preset magnetic induction pulse numerical value, the embedded processor confirms that the pulse number is a startup signal, sends a startup control command, switches on a power supply unit 200 of the seismic data acquisition station, the seismic data acquisition station enters a working mode from the sleep mode, sets a working state mark and stores the working state mark (step S506), and drives an LED lamp through an indicating unit to prompt the power supply to be switched on in a flashing mode to enter the working state, and the seismic data acquisition station performs data acquisition, storage, transmission and other works (step S507); if the number of the magnetic induction trigger pulse signals received in the preset detection time interval does not accord with the preset number of the magnetic induction trigger signals, the external interference is judged, the trigger signals are not responded, and the false start operation is avoided.

When the seismic data acquisition station is in a startup working mode (step S508), if the pulse number detected by the embedded processor accords with a preset magnetic induction pulse numerical value and accords with a preset numerical value, the embedded processor sends a shutdown control command to enable the seismic data acquisition station to enter a sleep mode from the working mode, a sleep state mark is set and stored (step S509), an LED lamp is driven by an indicating unit to prompt the power supply to be turned off in a flashing mode, and the seismic data acquisition station enters the sleep state (step S510);

and if the number of the magnetic induction trigger pulse signals received in the preset detection time interval does not accord with the preset number of the magnetic induction trigger signals, judging the signals to be electromagnetic external interference, and not responding to the magnetic induction trigger signals to avoid misoperation.

No matter the mode is a starting mode or a shutdown mode, the frequency range of the input pulse signals in the preset induction trigger signal detection time interval is an integer of 1-n, and the preset detection time interval value can be 1 second or other time interval values.

The preset detection time interval values of the startup mode and the shutdown mode and the input pulse number in the preset detection time interval can be independently set without mutual influence, and different startup and shutdown combination modes can be conveniently preset through different detection time interval values and different input pulse number combinations.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. An earthquake data acquisition station with an intelligent controllable switch comprises a closed shell, a power supply unit arranged in the closed shell and an earthquake detection acquisition unit powered by the power supply unit; the earthquake data acquisition station is characterized by further comprising a switch control unit and a switch induction unit, wherein the switch control unit and the switch induction unit are arranged in the closed shell; wherein the content of the first and second substances,

the switch induction unit is electrically connected with the switch control unit and used for sensing and generating a switch control signal and transmitting the switch control signal to the switch control unit;

the switch control unit is electrically connected with the switch induction unit, the earthquake detection acquisition unit and the power supply unit and is used for controlling the power supply unit to supply power or stop supplying power to the earthquake detection acquisition unit according to the switch control signal.

2. The seismic data acquisition station of claim 1, wherein the switch sensing unit comprises a magnetic induction sensing unit for sensing the generation of the switch control signal when an external magnet is in proximity.

3. The seismic data acquisition station of claim 2, wherein the magnetic induction sensing unit comprises a magnetic induction sensor and signal conditioning circuitry connected to the magnetic induction sensor;

the magnetic induction sensor is used for generating a trigger signal when the sensed external magnet approaches and sending the trigger signal to the signal conditioning circuit;

the signal conditioning circuit is connected with the switch control unit and used for conditioning the trigger signal to generate the switch control signal and send the switch control signal to the switch control unit.

4. The seismic data acquisition station of claim 3, wherein the magnetic induction sensors comprise one or more of magnetoresistive elements, Hall elements, reed switches.

5. A seismic data acquisition system comprising a seismic data acquisition station as claimed in any of claims 1 to 4, and a signal trigger separate from the seismic data acquisition station; and a switch sensing unit of the seismic data acquisition station senses the signal trigger and generates a switch control signal.

6. The seismic data acquisition system of claim 5, wherein the signal trigger comprises a permanent magnet.

7. A method for controlling the startup and shutdown of a seismic data acquisition station is characterized by comprising the following steps:

s1: recording the working state of the seismic data acquisition station;

s2: sensing and generating a switch control signal;

s3: and changing and storing the working state of the earthquake acquisition station according to the switch control signal so as to control the power supply unit to supply power or stop supplying power to the earthquake detection acquisition unit.

8. The method for controlling the opening and closing of the seismic data acquisition station according to any one of claims 7, wherein the step S2 includes:

s2-1: sensing a magnetic strength signal;

s2-2: when the magnetic strength signal is greater than a preset value, generating a trigger signal;

s2-3: and generating the switch control signal according to the trigger signal.

9. The seismic data acquisition station of claim 8, wherein in step S3 includes:

s3-1: judging whether the switch control signal is an effective switch control signal or not;

s3-2: counting the times of the effective switch control signals within a set time interval;

s3-3: and when the times are equal to the set times, changing and storing the working state of the earthquake acquisition station, and controlling the power supply unit to supply power to the earthquake detection acquisition unit or stop supplying power.

10. The seismic data acquisition station of claim 8 or 9, wherein the switch control signal is a magnetic induction pulse signal;

in the step S3-1, by determining whether the duration of the high potential or the low potential of the magnetic induction pulse signal reaches a set time, if yes, determining that the magnetic induction pulse signal is the active switch control signal;

in the step S3-2, the number of pulses of the magnetic induction pulse signal is calculated within a set time interval, and the number of times is counted;

in the step S3-3, when the number of times is equal to a first set number of times, changing the operating state of the earthquake acquisition station to a power-on state and storing the operating state, and controlling the power supply unit to supply power to the earthquake detection acquisition unit; and when the times are equal to a second set time, changing the working state of the earthquake acquisition station into a shutdown state and storing the shutdown state, and controlling the power supply unit to power off the earthquake detection acquisition unit.

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