CN205335917U

CN205335917U - Single channel does not have cable seismic detector power supply unit

Info

Publication number: CN205335917U
Application number: CN201620045238.0U
Authority: CN
Inventors: 张林行; 朱倩钰; 李娜; 孙峰; 文晓哲; 张彦峰
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2016-01-18
Filing date: 2016-01-18
Publication date: 2016-06-22
Anticipated expiration: 2026-01-18

Abstract

The utility model relates to a single channel does not have cable seismic detector power supply unit is connected with the external power power through electric quantity detection unit and lithium battery measurement controller by the controller, the controller through lithium battery measurement controller respectively with DCDC circuit and charge current detection circuit connection, the constitution is connected with start -up, power -off control unit with the DCDC converter to the switch button. Ability automated inspection gives lithium batteries to the access of external voltage automatically, and first constant current charging is constant voltage charge again, and the battery is full of back automatic disconnection. External power supply is used to the acquiescence when having external power supply, uses the lithium cell power supply during nos external power supply, crosses when low the controller at lithium battery power and sends out the police dispatch newspaper, stops to gather, stops power supply behind the storage data, prevents loss of data, improvement system reliability. When not gathering, control each module and get into the low -power consumption state, reduce system power dissipation, extension operating time. Compare with linear power supply, its efficiency is higher, can reach more than 90%. More be applicable to field work.

Description

A kind of single channel untethered seismic detector electric supply installation

Technical field:

This utility model relates to the electric power system of a kind of seismic prospecting instrument, especially a kind of single channel untethered seismic detector high efficiency high reliability electric power system, is particularly well-suited to the seismic prospecting instrument system being elementary cell with single channel untethered seismic detector。

Background technology:

Geophysical exploration mainly includes weight, magnetic, electricity, shakes, puts five big class methods, namely gravity, magnetic method, electrical method, seismic method, radiometric method。As a kind of important method of geophysical exploration, seismic wave method plays irreplaceable role always, is widely used in the field such as the advanced prediction finding exploration and the geological disaster such as fracture, gushing water of the resources such as oil gas, metal, coal, water。The composition structure of seismic survey system mainly includes focus, seismic wave detects unit, lock unit, communication unit, control master station etc.。Its operation principle is as follows: first focus produces the controlled seismic waves such as energy, direction, waveform in region to be measured, and focus can be explosive, electromagnetic seismic source or hydraulic pressure focus。It is distributed in the detection unit of each seismic wave around focus and detects and record the vibration data of each point, data of each detection unit can synchronize by GPS or by line locking, detects and just can be known the geologic structure of search coverage and the presence or absence of mineral products and the information such as content is how many after terminating by various FORWARD AND INVERSE PROBLEMS data processing algorithms。

Each sub-station for detection of seismic survey system of early stage is connected by cable, cable completes the functions such as power supply, data transmission, synchronization, but a seismic survey system generally includes hundreds of substations, it is distributed in the scope of focus periphery radius of several kilometers, this has allowed for cable seismic detector many drawbacks, and the big cost of as huge in cable amount, volume is high, construction is slow, trouble shooting difficulty。In order to solve above-mentioned drawback, progress along with technology, people begin one's study untethered seismic survey system, untethered seismic survey system is most important is modified in that the connection cable eliminated between each sub-station for detection and between substation and main website, making each substation become relatively independent unit, the mode all through radio communication that communicates between substation with substation and substation with main website realizes。Radio communication solves above-mentioned drawback but also brings some problems, such as powerup issue。Owing to eliminating cable, each sub-station for detection can only adopt battery to power, it is limited by the factors such as volume, cost, easy construction, battery capacity can not be infinitely great, and generally substation includes the ingredients such as one or more data acquisition unit, GPS lock unit, mass data storage unit, constant-temperature crystal oscillator, central controller, so complicated system brings appreciable power consumption。On the other hand, although sub-station for detection power consumption in data acquisition is higher, but in entirely seismic exploration work progress, data acquisition only accounts for the very small part time, most of the time is in the processes such as debugging, synchronization, test, in this part-time, in order to reduce system power dissipation as far as possible, need control system to enter low power consumpting state, close all no modules。But hundreds of acquisition substation are difficult to realization by manual switching duty one by one。

On the other hand, seismic survey system is huge, complicated, an expense of constructing is very high, it requires system reliability height as far as possible, and especially each substation power supply reliability is high, can automatically detect self electric quantity and exchange data with control main website in time, if electricity is lower than reliably working point, notice main website sends someone to change battery in time, it is to avoid gathers loss of data or gathers the problems such as data distortion, minimizing is done over again, and saves cost。

CN204331048U discloses " untethered memory-type seismic detector low-power dissipation power supply management system ", low-power dissipation power supply management module preset in acquisition station is to be connected single-chip microcomputer, Big Dipper module, collecting unit, GPS positioning unit by power supply respectively through on-off circuit, single-chip microcomputer connects GPRS module and main control unit respectively through analog switch, Big Dipper module connects single-chip microcomputer and main control unit respectively through analog switch, and main control unit connects collecting unit and GPS positioning unit respectively。Power supply connects and composes through voltage conversion circuit and single-chip microcomputer。This electric power system function singleness, system is perfect not, is not suitable for single channel untethered seismic detector and powers。

Yang Hongyuan etc. disclose " low power dissipation design of untethered telemetric seismic instrument acquisition station " " electrical measurement and instrument " the 01st phase total 46th volume the 517th in 2009 is interim, literary composition is selected low-power consumption components and parts carry out hardware circuit design and optimization software design two aspect starts with to reduce seismograph acquisition station power consumption, with the ARM Master Control Center being dynamic power management, although the power consumption of seismograph acquisition station can be reduced to a certain extent, but ARM power consumption is much larger than MSP430 single-chip microcomputer power consumption；This design does not use telecommunication mode to realize seismograph acquisition station low-power consumption, and when there being hundreds seismic detector large area region in the wild to work, its practicality is necessarily somewhat limited。

Summary of the invention:

The purpose of this utility model is that for above-mentioned the deficiencies in the prior art, it is provided that a kind of single channel untethered seismic detector electric supply installation。

The purpose of this utility model is achieved through the following technical solutions:

A kind of single channel untethered seismic detector electric supply installation, it is be connected with externally fed power supply through electric power detection unit 2 and charging and discharging lithium battery controller 1 by STM32 controller 6, STM32 controller 6 connects respectively at DC/DC circuit 3 and charging current detecting circuit 4 through charging and discharging lithium battery controller 1, electric power detection unit 2 switches circuit 7 through lithium battery 5 with power supply mode and is connected, the charged current detection module 4 of lithium battery 5 and DC/DC circuit 3 are connected with externally fed power supply, STM32 controller 6 switches circuit 7 with power supply mode and is connected, and STM32 controller 6 is activated, shutdown control unit 10 is connected with DC/DC changer 8, switch key 9 and startup, shutdown control unit 10 is connected with DC/DC changer 8, STM32 controller 6 pass through data wire respectively with SD/TF memory element, signal amplifies, filtering, conditioning unit, wireless communication unit, ethernet communication unit and GPS lock unit connect, and STM32 controller 6 amplifies with signal through AD sampling unit, filtering, conditioning unit connects, and externally fed power supply is by data wire and control line and GPS lock unit, ethernet communication unit, wireless communication unit, signal amplifies, filtering, conditioning unit, SD/TF memory element and STM32 controller 6 connect and compose。

Beneficial effect: battery charging and discharging administrative unit can automatically detect the access of external voltage, and the input voltage range that compatibility is wider (13V-20V) is automatically to lithium cell charging, first constant-current charge constant-voltage charge again, battery disconnects charging circuit after being full of automatically。When having an external power supply, system default uses external power supply work, lithium battery is full of simultaneously, in time without external power supply, uses lithium battery power supply, alarm is sent to controller when electric quantity of lithium battery is too low, make controller stop collecting work, store data, wait controller to stop power supply again after completing a series of shutdown task, prevent loss of data, improve system reliability。When system is not at data acquisition state, controls modules and enter low power consumpting state, reduce system power dissipation, lengthen working hours。Power supply adopts BUCK blood pressure lowering DC/DC circuit, and power supply is on off state, and compared to conventional linear power supply, it is in hgher efficiency, up to more than 90%。To sum up, proposed system has the feature of high efficiency, high reliability, is especially more suitable for the untethered seismic detector sub-station for detection of field work。

Accompanying drawing illustrates:

Fig. 1 is a kind of single channel untethered seismic detector electric supply installation structured flowchart

Fig. 2 is charging and discharging lithium battery control and electric quantity detecting circuit figure

Fig. 3 is the circuit diagram of blood pressure lowering DC/DC circuit 4

Fig. 4 is button, startup and shutdown control circuit figure

Fig. 5 is single channel untethered seismic detector electric supply installation switching on and shutting down workflow diagram

1 charging and discharging lithium battery controller, 2 electric power detection unit, 3DC/DC circuit, 4 charging current detecting circuits, 5 lithium batteries, 6STM32 controller, 7 power supply mode switching circuit, 8DC/DC changer, 9 switch keys, 10 startups, shutdown control unit。

Detailed description of the invention:

Below in conjunction with drawings and Examples, utility model is described in further detail:

Battery charging and discharging administrative unit block diagram is as it is shown in figure 1, include charging and discharging lithium battery controller 1 electric power detection unit 2, BUCK blood pressure lowering DC/DC circuit 3, charging current detecting circuit 4, lithium battery 5, STM32 controller 6。Charging and discharging lithium battery controller 1 can detect the access of externally fed power supply automatically, and the input voltage variation of the compatible 13-20V of energy, if now electric quantity of lithium battery is not enough, then control BUCK blood pressure lowering DC/DC circuit 3 input voltage is reduced to suitable magnitude of voltage to charge to lithium battery 5, whole charging process takes different charging strategy according to the electric quantity change of lithium battery, so can avoid damaging to lithium battery 5, extend the service life of battery 5。Constant current charging mode is adopted when specific strategy and electric quantity of lithium battery are relatively low, detected charging current by current detection circuit 4 and feed back to charging and discharging lithium battery controller 1 for completing closed loop control, when electricity is charged to high value, then adopt constant voltage charging method, reduce charge rate, it is to avoid lithium battery voltage exceedes limit value, in charging current is less than constant current strategy the ten of current value/for the moment, thinking charging complete, controller cuts out BUCK circuit, complete charge process。

When there being external power supply to access, then system default uses external power supply to power, and is full of by electric quantity of lithium battery simultaneously。When external power supply disconnects, system automatically switches to lithium battery power supply, and whole process seamless switching, system need not be shut down。When using lithium battery 5 to power, electric power detection unit 2 detects the dump energy of lithium battery 5 in real time, when dump energy is less than alarm value (such as 5%), alarm is sent to STM32 controller 6, now, STM32 controller 6 cuts out calmly gathering of task, storage data and relevant setting, or send, to main website, the information that electricity is too low by wireless communication unit, it is desirable to main website sends someone replacing battery to continue to gather。

Voltage stabilizing power supply unit, as it is shown in figure 1, include power supply mode switching circuit 7DC/DC changer 8STM32 controller 6。Its physical circuit is as it is shown on figure 3, power supply mode switching circuit is for two kinds of power supply modes of seamless switching。DC/DC changer adopts BUCK reduction voltage circuit, and the input voltage range that this circuit is allowed is wider (4V-65V), adopts close-loop control mode, so when input voltage changes, still can guarantee that output power supply is reliable and stable。

Start, shutdown control unit, as indicated with 1, including starting key 9, startups, shut down figure control unit 10 and STM32 controller 6, its physical circuit as shown in Figure 4,

Switching on and shutting down workflow is as shown in Figure 5, start-up course is as follows, when user presses starting key, start unit starts timing, if key press time exceedes setting value (such as 3s), start start-up course, start unit sends signal control DC/DC changer and starts working, and exports stable supply voltage, and time delay contributes to preventing from touching the system error starting that the situations such as starting switch cause by mistake。Shutdown process divides a variety of situation, the first is the artificial normal shutdown by key mode, shutdown process is, length exceedes setting value (such as 3s) then system by the start key time and enters shutdown process, start, first shutdown control unit sends shutdown command to controller STM32, STM32 starts to perform shutdown programm after receiving shutdown command, stop sampling and send substation shutdown information to main website, storage related data, Deng feeding back information that shutdown programm is finished after everything in readiness again to starting, shutdown control unit, at this moment start, shutdown control unit cutting system power supply again, ensure that whole shutdown process is calm and unhurried, data will not be lost, the reliability of enhancing system。The second situation is that main website remotely controls shutdown, this is also the normal shutdown flow process of a kind of manual control, when namely STM32 starts to perform shutdown programm after receiving, by wireless communication unit, the shutdown command that main website sends, it is similar that idiographic flow catches up with a kind of situation, after being finished Deng shutdown programm, sending instruction to startup, shutdown control unit, now startup, shutdown control unit cut-out power supply, system closedown completes again。The third is unartificial shutdown process, when system detects that the supply voltage from lithium battery or externally fed power supply is too low, too high or fluctuation is too big, first shutdown command is sent to STM32, it is allowed to perform shutdown programm, keep output voltage stabilization as far as possible for a long time simultaneously, to ensure that STM32 can complete shutdown programm, it is then cut off power supply。

Claims

1. a single channel untethered seismic detector electric supply installation, it is characterized in that, it is be connected with externally fed power supply through electric power detection unit (2) and charging and discharging lithium battery controller (1) by STM32 controller (6), STM32 controller (6) connects respectively at DC/DC circuit (3) and charging current detection module (4) through charging and discharging lithium battery controller (1), electric power detection unit (2) switches circuit (7) through lithium battery (5) with power supply mode and is connected, lithium battery (5) charged current detection module (4) and DC/DC circuit (3) are connected with externally fed power supply, STM32 controller (6) switches circuit (7) with power supply mode and is connected, STM32 controller (6) is activated, shutdown control unit (10) is connected with DC/DC changer (8), and switch key (9) is activated, shutdown control unit (10) be connected with DC/DC changer (8), STM32 controller (6) by data wire respectively with SD/TF memory element, signal amplifies, filtering, conditioning unit, wireless communication unit, ethernet communication unit and GPS lock unit connect, and STM32 controller (6) amplifies with signal through AD sampling unit, filtering, conditioning unit connects, and externally fed power supply is by control line and data wire and GPS lock unit, ethernet communication unit, wireless communication unit, signal amplifies, filtering, conditioning unit, SD/TF memory element and STM32 controller (6) connect and compose。