CN101021726A - Superconducting gravimeter double-temperature refrigerating expander intelligent monitor - Google Patents
Superconducting gravimeter double-temperature refrigerating expander intelligent monitor Download PDFInfo
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Abstract
This invention discloses an intelligent monitoring device for superconducting gravimeter double-temperature refrigeration Expander, relating to a temperature monitoring and recording device. The invention mainly includes the first, second cooling-platinum resistance, ADC, microprocessor, memory, characters display, relay, and RS-232 interface. This invention uses sensors and computer technology with the integration of monitor and control to achieve the display, storage and monitoring of two refrigeration temperatures for double-temperature refrigeration Expander. When the two refrigeration temperatures are beyond the set scope, it can make the sound and light automatic alarm, and at the same time rapidly cut off the power, to protect the Expander and the superconducting gravimeter.
Description
Technical field
The present invention relates to a kind of monitoring temperature pen recorder; Specifically, relate to a kind of superconducting gravimeter double-temperature refrigerating expander intelligent monitor, can be applicable to measurement, earthquake and other department.
Background technology
Superconductive gravimeter utilizes the intrinsic stability of supercurrent, and the mechanical spring that has substituted traditional gravity meter with magnetic levitation hangs, thereby has high sensitivity and stability, is one of gravity meter that precision is the highest in the world today.It not only can be used for detecting and study the morning and evening tides of solid earth, freely examine the geodynamics phenomenons such as tectonic movement of nutating, free oscillation, rotation variation and the earth's crust, can also be used to studying the interaction of each ring layer such as atmosphere, ocean and underground water and the coupling effect of gravity field, for Modern Geodesy and space measurement technology provide the observation benchmark.
Superconductive gravimeter uses the helium of vaporization as cold-producing medium, adopts the two-stage refrigeration modes, keeps the working environment of ultralow temperature (being lower than-200 ℃) by double-temperature refrigerating expander, always works in superconducting state to guarantee the superconductive gravimeter sensing unit.
The working temperature of double-temperature refrigerating expander and stability thereof are most important to the measuring accuracy of superconductive gravimeter.Their variation, can reduce thermoregulator long-time stability, change the heat flux distribution of gas in the cooling Dewar system, make between magnetic coil and the superconducting sphere and produce thermal gradient, in magnetic field and gravity meter signal, form drift, produce the measuring error that surpasses instrument permission precision.So, need sample respectively to first and second refrigeration-grade temperature of refrigerating expander, correct in order to carry out data necessary, guarantee the measuring accuracy of superconductive gravimeter.
Yet there is the problem of the following aspects in present superconducting gravimeter double-temperature refrigerating expander:
1, do not possess the ability that continuous real-time monitoring shows its two refrigeration-grade temperature, can't cause above the measuring error of instrument permission precision variation of temperature and carry out the data necessary correction, guarantee the measuring accuracy of superconductive gravimeter.
2, break down at refrigerating expander, when causing cryogenic temperature unusual, can not cut off its power supply automatically, to making superconductive gravimeter may break away from superconducting state, the gravimetric data that provides correct can't be continued, even the major accident of superconductive gravimeter body may be polluted.
3, when refrigerating expander two refrigeration-grade temperature exceed tolerance band, can not carry out sound, light warning automatically, remind the maintainer in time to reach the spot, fault is made judged and processing, bring hidden danger to work.
4, the temperature of refrigerating expander two refrigeration-grade and gps data can not be outputed to that the computer recording system carries out real-time continuously data and graph curve shows, storage and printing, be not easy to the analysis and judgement of data, lack the foundation of repair and maintenance.
5, the ability that does not possess real-time demonstration Greenwich date, time and Beijing time can not be utilized gps time data sync computer recording system, makes it and the GMT (Greenwich mean time) precise synchronization, is unfavorable for the record analysis of observation data.
Summary of the invention
Purpose of the present invention just is to overcome the above-mentioned shortcoming and defect that prior art exists, and a kind of superconducting gravimeter double-temperature refrigerating expander intelligent monitor is provided.Specific requirement:
The first adopts sensor and microcomputer technology, monitor set, is controlled in one, realizes demonstration, storage and monitoring to double-temperature refrigerating expander two refrigeration-grade temperature;
It two is when the temperature of two refrigeration-grade exceeds setting range, can cut off the refrigerating expander power supply rapidly when sound, light are reported to the police automatically, reaches the purpose of protection refrigerating expander and superconductive gravimeter body;
It three is according to the setting of user by dial, automatically refrigerating expander two refrigeration-grade temperature results data is regularly concentrated by communication interface to output to the computer recording system and shown and store;
It four is to utilize gps time data sync computer recording system, makes it and the GMT (Greenwich mean time) precise synchronization;
Its five be simple in structure, precision is high, low in energy consumption.
The object of the present invention is achieved like this:
First, second refrigeration-grade place in double-temperature refrigerating expander is provided with platinum resistance thermometer sensor, respectively, causes the present invention by signal wire, is used for the detection of refrigerating expander working temperature.
The present invention is made up of parts such as platinum resistance thermometer sensor,, microprocessor, alphanumeric display, relay, communication interface, operation keyboard, communication interfaces.After finishing the power-on self-test of watch-dog, the voltage analog signal of refrigerating expander first and second refrigeration-grade is sent into analog to digital converter, be converted to digital signal and deliver to microprocessor, relation according to measured signal and platinum resistance thermometer sensor,, temperature, table look-up accordingly and computing, can obtain platinum resistance thermometer sensor, value and corresponding temperature on current refrigerating expander first and second refrigeration-grade, after being converted into ASCII character, continuously in real time demonstration on alphanumeric display; In case find that temperature exceeds the scope that sets, promptly when sound, light are reported to the police automatically,, cut off the refrigerating expander power supply rapidly by relay control, reach the purpose of protection equipment.In addition, the temperature data of two refrigeration-grade also can pass through the RS-232 communication interface, outputs to the computer recording system with serial mode, is shown in real time and stores, as analyzing the foundation of safeguarding from now on.
Specifically:
As shown in Figure 1, circuit board of the present invention is installed in the casing 24.Alphanumeric display 10, options button 13, setting key 14, the indication 16 of reporting to the police, power supply indication 19, losing lock indication 20, second indication 21, contrast adjustment 22, bias light switch 23 are installed on the front panel of casing 24.
As shown in Figure 2, dial 9, hummer 15, gps antenna socket 25, refrigerating expander power supply control socket 26, RS-232 interface accessory power outlet 27, refrigerating expander first refrigeration-grade and the second refrigeration-grade temperature signal input socket 28 and 29 are installed, power switch 30, supply socket 31 on the rear panel of casing 24.
As shown in Figure 3, the first refrigeration-grade platinum resistance thermometer sensor, 6 links to each other with the signal input part of analog to digital converter 8 respectively with the second refrigeration-grade platinum resistance thermometer sensor, 7; The output terminal of reference voltage source 5 links to each other with the reference voltage input terminal of analog to digital converter 8; The output terminal of GPS-OEM plate 2, memory 4, dial 9, options button 13, setting key 14 link to each other with the input end of microprocessor 3 respectively; The output terminal of microprocessor 3 links to each other with the input end of alphanumeric display 10, relay 11, the input end of RS-232 communication interface 12 respectively; The output terminal of relay 11 links to each other with refrigerating expander power supply 17, hummer 15, the indication 16 of reporting to the police; The output terminal of RS-232 interface 12 links to each other with computer recording system 18.
Gps antenna (1) links to each other with the input end of GPS-OEM plate (2);
Principle of work of the present invention is: after finishing the power-on self-test of watch-dog, analog to digital converter 8 is sent in voltage analog signal timesharing on the refrigerating expander first and second refrigeration-grade platinum resistance thermometer sensor, s 6,7, be converted to digital signal and deliver to microprocessor 3, relation according to measured signal and platinum resistance thermometer sensor,, temperature, table look-up accordingly and computing, after the platinum resistance thermometer sensor, value and corresponding temperature data that obtain refrigerating expander two refrigeration-grade, be converted into ASCII character, on alphanumeric display 10, shown, stored by memory 4 simultaneously.The time interval that on dial 9, is provided with according to the user, by RS-232 communication interface 12 self-timings output serial data, concentrate the computer recording system 18 that offers, finish demonstration, storage and the printing of datagraphic curve, carry out the data necessary correction variation of temperature is caused above the measuring error of instrument permission precision, guarantee the measuring accuracy of superconductive gravimeter, and as analyzing the foundation of safeguarding from now on.Meanwhile; also compare by the set alarm threshold value of setting key 14 with the user at any time; in case find that temperature exceeds the scope of setting; promptly when hummer 15, the indication 16 of reporting to the police, light are reported to the police; by relay 11 controls; cut off refrigerating expander power supply 17 rapidly, reach the purpose of protection equipment.
Duration of work, watch-dog also automatic reception are followed the tracks of, are locked signal from the gps signal of antenna 1, extract information such as date, time and three-dimensional position, show high precision time and geographical location information on alphanumeric display 10 continuously in real time; Also can pass through serial line interface 12 simultaneously, the system clock of computer recording system 18 is proofreaied and correct in real time, make it and the Coordinated Universal Time(UTC) precise synchronization.
The present invention compared with prior art has the following advantages and good effect:
1. adopt controlled by single chip microprocessor, simple in structure, easy to operate, antijamming capability is strong, cost and low in energy consumption, and volume is little.
2. round-the-clock, the continuous monitoring that provides in real time refrigerating expander possesses the ability that shows its two refrigeration-grade platinum resistance thermometer sensor, value and its corresponding temperature simultaneously, helps the monitoring to the refrigerating expander duty.
3. have and show a page or leaf switching capability, the user can be switched by the demonstration of observation datas such as platinum resistance thermometer sensor, value, temperature value and GPS that keyboard carries out two refrigeration-grade of refrigerating expander.
4. have the ability that the temperature alarming threshold value is set, the user can carry out the setting of alarm threshold value of two refrigeration-grade of refrigerating expander by keyboard.
5. in the time of can exceeding setting range in two refrigeration-grade temperature of refrigerating expander, carry out sound, light warning and character blinking prompting automatically, remind the maintainer in time to reach the spot, fix a breakdown, the while is cut-out refrigerating expander power supply automatically, reaches the purpose of protection equipment.
6. the RS-232 communication interface can be with the observation datas such as platinum resistance thermometer sensor, value, temperature value and GPS of refrigerating expander two refrigeration-grade, via the serial communication cable, output to the computer recording system, finish demonstration, storage and the printing of datagraphic curve, carry out the data necessary correction variation of temperature is caused above the measuring error of instrument permission precision, guarantee the measuring accuracy of superconductive gravimeter, and as analyzing the foundation of safeguarding from now on.
7. can be according to the time interval of user by the dial setting, the data that will be pre-stored in automatically in the memory are regularly carried out the concentrated unloading of data to the computer recording system, simultaneously refresh memory.
8. except platinum resistance thermometer sensor, being installed at two refrigeration-grade places of refrigerating expander and the power lead of refrigerating expander being inserted the refrigerating expander power supply control socket of the present invention, need not make any change to original cryogenic refrigerating system, simple, convenient, quick, have application value.
9. the temporal information of RS-232 communication interface output, can be input to the computer recording system via the serial communication cable, its system clock is proofreaied and correct, make it and the Coordinated Universal Time(UTC) precise synchronization, help the record analysis of observation data, changed the conventional computer system time precision low, need manually to the time working method.
In a word, use of the present invention can improve the robotization and the safe coefficient of superconductive gravimeter observation, and the usefulness of refrigerating expander two refrigeration level work temperature datas as the analysis of superconductive gravity observation data, correction is provided, have certain application and exploitation value in fields such as geodetic surveying, geophysics, seismological observations.
Description of drawings
Fig. 1 is a contour structures front panel synoptic diagram of the present invention;
Fig. 2 is a contour structures rear panel synoptic diagram of the present invention;
Fig. 3 forms block scheme for the present invention;
Fig. 4 is a built-up circuit schematic diagram of the present invention.
Wherein:
1-GPS antenna, 2-GPS-OEM plate, present embodiment is selected the GPS25 of GAMIN company for use;
3-microprocessor, present embodiment are selected the AT89C32 and the support circuit thereof of atmel corp for use;
4-memory, present embodiment are selected 6264 static RAM (SRAM)s for use;
The 5-reference voltage source, present embodiment is selected AD780 for use;
The 6-first refrigeration-grade platinum resistance thermometer sensor;
The 7-second refrigeration-grade platinum resistance thermometer sensor;
8-analog to digital converter, present embodiment are selected the AD7730 of AD company for use and the circuit of test voltage are provided to two refrigeration-grade platinum resistance thermometer sensor,s via reference voltage source;
The 9-dial;
10-alphanumeric display, present embodiment are selected the MDLS16268C of smart electric company for use;
The 11-relay;
The 12-RS-232 interface, present embodiment is selected MAX202 for use;
The 13-options button;
The 14-setting key;
The 15-hummer;
The 16-indication of reporting to the police;
17-refrigerating expander power supply;
18-computer recording system;
The indication of 19-power supply;
The indication of 20-losing lock;
21-indicates second;
The 22-contrast adjustment;
23-bias light switch;
The 24-casing;
The 25-GPS antenna socket;
26-refrigeration machine power supply control socket;
27-RS-232 interface accessory power outlet;
The 28-first refrigeration-grade temperature signal input socket;
The 29-second refrigeration-grade temperature signal input socket;
The 30-power switch;
The 31-supply socket.
Embodiment
Below in conjunction with Fig. 4 each functional block of the present invention is further specified:
Fig. 4 is the circuit theory diagrams of Fig. 3 correspondence.
* microprocessor 3
The inside memory of microprocessor 3 is divided into program and data memory two parts.Wherein, management, watchdog routine are deposited in the memory under program, and the intermediate result deposit data is in data memory.
SS1 crystal oscillator and capacitor C 2, C3 form the crystal oscillating circuit of 11.059MHz, and linking to each other with X1, the X2 pin of microprocessor 3 constitutes the internal oscillator mode, is used to provide the time reference of various microoperations in the microprocessor 3.
The 74LS373 address latch is used to solve the problem of microprocessor 3 address buss and data bus time-sharing multiplex.
The 74LS138 address decoder is deciphered address wire A13-A15, and its output Y0-Y2 as the chip selection signal of memory 4, analog to digital converter 8, alphanumeric display 10, is conducted interviews to their timesharing by data line by microprocessor 3 respectively.
* memory 4, options button 13 and setting key 14
S1 as options button 13 exports interrupt request singal via the preventing jittering circuit that resistance R 3, R4 and 74LS00 Sheffer stroke gate constitute, insert the INT1 pin of microprocessor 3, under the prompting of alphanumeric display 10 on-screen menus, adopt the page turning mode, show in real time successively: the platinum resistance thermometer sensor, value and the corresponding temperature of refrigerating expander two refrigeration-grade, and GMT (Greenwich mean time), the date measured, GPS observation datas such as Beijing time, longitude, latitude and height.
S2 as setting key 14 exports interrupt request singal via the preventing jittering circuit that resistance R 6, R7 and 74LS00 Sheffer stroke gate constitute, insert the INT0 pin of microprocessor 3, under the prompting of alphanumeric display 10 on-screen menus, adopt and whenever press a Temperature numerical increase by 1 of setting key; When options button 13 is pressed, whenever press 14 numerical value of setting key and reduce by 1 mode, the temperature alarming threshold value of the first/two refrigeration-grade is set.
* reference voltage source 5, analog to digital converter 8
It is 24 AD7730 that analog to digital converter 8 is selected the resolution of AD company for use, is configured to the signal input of 2 passages.Microprocessor 3 is connected with the DIN end with SCLK, DRDY/, the DOUT of analog to digital converter 8 respectively by P14, P15, P16, the P17 of its port.The MCLKIN of analog to digital converter 8 and MCLK OUT termination are gone into the SS2 crystal, in order to obtain time-base signal.Reference voltage source 5 adopts low noise voltage reference source AD780, as the benchmark of analog to digital conversion voltage, inserts the REF IN+ end of microprocessor 3.The voltage analog signal of refrigerating expander first and second refrigeration-grade, respectively through 2 signal imitation input end AIN1+ of analog to digital converter 8/-, AIN2+/-directly detect, by analog switch one by one timesharing send into input buffer and programmable gain amplifier, convert the digital pulse sequence that contains numerical information to through ∑-△ modulator, handle via the programmable lowpass digital filter of cutoff frequency.After analog to digital conversion is finished, the DRDY/ pin output level step-down of analog to digital converter 8, and require microprocessor 3 that SCLK is provided clock signal; Microprocessor 3 is provided with the register of analog to digital converter 8 by P14, P15, P17 programming output, with current channel number and result data, with the GPS information that receives, call by interrupt function, send into alphanumeric display 10 and show in real time and memory 4 preservations.
* alphanumeric display 10
8 bit parallel data buss of alphanumeric display 10 directly connect with system data bus, and microprocessor 3 sends instruction code or data to alphanumeric display 10 under the data bus form.With the reading RD/ and write the WR/ control signal of microprocessor 3, the sheet of generation alphanumeric display 10 selects E from the Y2 of address decoder 74LS138 output; The control signal that the OPADD A0 of address latch 74ls373, A1 then select as the instruction/data register and read/write is selected.Behind the potentiometer P1 and 5 couples of supply voltage VCC of resistance R dividing potential drop of degree adjusting 22, offer the VD pin as a comparison, in order to regulate the demonstration contrast of alphanumeric display 10.S3 is back-illumination source control, the 5V DC voltage can be offered the light emitting diode of alphanumeric display 10, and it can be used under the condition of the low light level or dark.
* relay 11, hummer 15 and the indication 16 of reporting to the police
One end of inductance L links to each other with an end of the normally opened contact of capacitor C 19 anodes and relay R EL, the other end of L and capacitor C 20 and+the 5V power supply links to each other; The negative terminal of C19, C20 links to each other with ground.The other end of normally opened contact links to each other with an end of hummer 15.
P35 controls the red light emitting diodes L4 of hummer 15 and conduct warning indication 16 simultaneously.At ordinary times, P35 is a low level, and the common compound transistor that constitutes of triode N2, N3 ends, and the relay normally open contact open circuit does not have electric current to pass through hummer 15, and hummer not sounding is warned, and indicates 16 light emitting diode L4 also not glimmer luminous as reporting to the police.And this moment, normally closed contact was in closure state, can be added on the refrigeration machine power supply 17 the refrigeration machine operate as normal with the 220V alternating voltage that it is connected in series mutually;
In case inquiring certain one-level cryogenic temperature, microprocessor 3 exceeds the alarm threshold value of setting, P35 pin output high level, the common compound transistor conducting that constitutes of triode N2, N3, the relay normally closed contact disconnects, cut off refrigeration machine power supply 17 rapidly, reach the purpose of protection equipment; And relay normally open contact closure this moment ,+5V voltage inserts, and hummer 15 intermittently sounding is warned, and is luminous with warning indication 16 flickers of its polyphone.R21 provides divided current for the L4 of the indication 16 of reporting to the police.Inductance L, capacitor C 19, C20 constitute jointly+filtering circuit of 5V power supply, and the interference that level and smooth hummer 15 intermittently forms during sounding.
* GPS-OEM plate 2, a losing lock indication 20 and a second indication 21
2 automatic receptions of GPS-OEM plate are from the gps signal of the L1 wave band of antenna 1, through preposition amplification, narrow-band filtering, frequency synthesis,, be divided into 12 parallel channels by the high-speed a/d conversion, realization is to tracking, the locking of gps signal, with the baud rate output serial data of 9600baud.Microprocessor 3 extracts the information such as date, time and three-dimensional position that obtain on the one hand, is shown on alphanumeric display 10 in the mode of character, and time and geographical location information are provided continuously in real time; By the communication stube cable, call simultaneously,, the system clock of computer recording system 18 is proofreaied and correct, thereby make itself and Coordinated Universal Time(UTC) precise synchronization the split-second precision information of watch-dog output via interrupt function.
The pulse per second (PPS) of GPS-OEM plate 2 outputs is after the amplifier that triode N1, resistance R 8, R9 constitute is anti-phase, the monostable circuit that constitutes by LM555 and resistance R 10, capacitor C 4, C5, output to as second light emitting diode L2 of indication 21 arrival of indication pulse per second (PPS).
When locking satellite is less than 3, when the present invention was in out-of-lock condition, the P34 human hair combing waste of microprocessor 3 went out pulse signal, outputed to light emitting diode L3 as losing lock indication 20 through the 74LS00 Sheffer stroke gate, made its flicker; With it simultaneously, alphanumeric display 10 information that flicker shows " following the tracks of ... "; During losing lock, the present invention can automatically switch to internal clocking, continues the retention time demonstration.
* RS-232 interface 12
Because the serial data of microprocessor 3 output is the Transistor-Transistor Logic level of 0～5V, and 18 configurations of computer recording system is the serial line interface of RS-232C standard, and the electrical code of the two is inconsistent, can not directly carry out communication.For this reason, set up serial transceiver MAX202, serial port TXD output terminal by microprocessor 3, by the asynchronous serial communication of transceiver realization watch-dog and computer recording system, the resistance of output refrigerating expander the first/the second refrigeration-grade platinum resistance thermometer sensor,, corresponding temperature value and gps datas such as GMT (Greenwich mean time), date or Beijing time.
According to above design concept, the present invention adopts following program:
One. master routine:
The function of master routine is that each interface is carried out initialization: working method, the keyboard interrupt mode of microprocessor 3 serial ports and alphanumeric display 10 is set and presets initial value etc. for storehouse, data-storing unit and tag unit.After finishing the power-on self-test of watch-dog, read the current page number in the tag unit, pack into and show corresponding page or leaf content.After the analog signal data that obtains each refrigeration-grade output of current refrigerating expander, relation according to they and platinum resistance thermometer sensor,, temperature, carrying out corresponding calculated by microprocessor 3 handles, pass through lookup table mode, the result data that is preset at each refrigeration-grade of refrigerating expander in the data-storing unit is extracted, be converted to ASCII character, on alphanumeric display 10, shown and send memory 4 to be preserved.
After judging and receiving the GPS information data, microprocessor extracts the information such as date, time and three-dimensional position that obtain, and in the time of will the Coordinated Universal Time(UTC) being converted into Beijing, stores corresponding data cell respectively into; Inquire about the present invention simultaneously and whether be in out-of-lock condition, if losing lock then makes losing lock indication 20 flickers, and by display reminding information on the alphanumeric display 10;
In the time interval that watch-dog is provided with on dial 9 according to the user, regularly concentrate the output serial data by RS-232 communication interface 12.
Program is passed through setting key 14 determined alarm threshold values according to the user, compare with each refrigeration-grade Current Temperatures result data of refrigerating expander, whether the query monitor device is in alarm condition, if be in alarm condition, then make indication 16 flickers of reporting to the police, hummer 15 is sounding intermittently; Simultaneously,, cut off refrigeration machine power supply 17 rapidly, reach the purpose of protection equipment by relay 11 controls; Alphanumeric display 10 flickers show " alarm meanwhile! First (or second) refrigeration-grade temperature exceeds setting value! " information.Only after the result data of Current Temperatures was lower than alarm threshold value, microprocessor 3 withdrawed from alarm condition just now.Return said process heavily again.
When receiving options button 13 or setting key 14 when sending interrupt request, microprocessor 3 will stop to carry out master routine then remove to carry out interruption subroutine.After end of subroutine, the master routine that the side gets back to original execution again works on.Master routine adopts modular structure, and is independent mutually between each module.
Two. interrupt service routine 1:
Three. interrupt service routine 2:
Setting key 14 is via preventing jittering circuit output interrupt request singal, insert the INT0 pin of microprocessor 3, when setting key 14 is pressed, trigger corresponding interruption, enter this interrupt service routine, after closing interruption, keeping the scene intact, under the prompting of alphanumeric display 10 on-screen menus, on the basis of the first/the second refrigeration-grade alarm temperature threshold value of former setting, adopt and whenever press setting key 14 and once increase by 1 degree; If options button 13 is pressed simultaneously, then whenever press the mode that setting key 14 once reduces by 1 degree, the first/the second refrigeration-grade alarm temperature threshold value is set.
After opening interruption, recovery scene, carry out the RETI instruction, interrupt turning back to master routine.
Claims (8)
1, a kind of superconducting gravimeter double-temperature refrigerating expander intelligent monitor is characterized in that:
The first refrigeration-grade platinum resistance thermometer sensor, (6) links to each other with the signal input part of analog to digital converter (8) respectively with the second refrigeration-grade platinum resistance thermometer sensor, (7); The output terminal of reference voltage source (5) links to each other with the reference voltage input terminal of analog to digital converter (8); The output terminal of GPS-OEM plate (2), memory (4), dial (9), options button (13), setting key (14) link to each other with the input end of microprocessor (3) respectively; The output terminal of microprocessor (3) links to each other with the input end of alphanumeric display (10), relay (11), the input end of RS-232 communication interface (12) respectively; The output terminal of relay (11) links to each other with refrigerating expander power supply (17), hummer (15), the indication (16) of reporting to the police; The output terminal of RS-232 interface (12) links to each other with computer recording system (18);
Gps antenna (1) links to each other with the input end of GPS-OEM plate (2).
2, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Gps antenna (1) and GPS-OEM plate (2) are selected the GPS25 type of GARMIN company for use.
3, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Microprocessor (3) is selected the AT89C52 and the support circuit thereof of atmel corp for use.
4, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Reference voltage source (5) is selected the AD780 of AD company for use.
5, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Analog to digital converter (8) is selected the AD7730 of AD company for use.
6, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Memory (4) is selected static RAM chip 6264 for use.
7, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
RS-232 communication interface (12) is made up of serial transceiver MAX202 and socket J232.
8, by the described double-temperature refrigerating expander intelligent monitor of claim 1, it is characterized in that:
Alphanumeric display (10) is selected the MDLS16268C of smart electric company for use.
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| CN 200710051669 CN101021726A (en) | 2007-03-15 | 2007-03-15 | Superconducting gravimeter double-temperature refrigerating expander intelligent monitor |
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| CN 200710051669 CN101021726A (en) | 2007-03-15 | 2007-03-15 | Superconducting gravimeter double-temperature refrigerating expander intelligent monitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101825889A (en) * | 2010-04-15 | 2010-09-08 | 中国地震局地震研究所 | Intelligent measurement control system |
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