CN113985723B - Beidou-based regional geophysical observer NTP time service system and method - Google Patents
Beidou-based regional geophysical observer NTP time service system and method Download PDFInfo
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- CN113985723B CN113985723B CN202111197671.8A CN202111197671A CN113985723B CN 113985723 B CN113985723 B CN 113985723B CN 202111197671 A CN202111197671 A CN 202111197671A CN 113985723 B CN113985723 B CN 113985723B
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a Beidou-based regional geophysical observer NTP time service system and a method, wherein the system comprises an equipment cabinet, a geophysical observer, an NTP server, a Beidou antenna and a heat dissipation mechanism; the heat dissipation mechanism comprises a heat dissipation fan and two heat dissipation units; the geophysical observation instrument and the NTP server are respectively arranged on the two heat dissipation units; the geophysical observation instrument is in communication connection with the NTP server. According to the regional geophysical observer NTP time service system and method based on the Beidou, clock monitoring and calibration are carried out by utilizing the independently installed NTP servers, so that the geophysical observers in the regions can work normally, instrument clocks of a whole network are prevented from being influenced due to the fault of one NTP clock server, and the influence of network delay on time correction precision can be reduced through the independent regional arrangement of the NTP servers; the Beidou time service is utilized to avoid the influence of the GPS system on observation due to clock turnover and chip limitation.
Description
Technical Field
The invention relates to an NTP (network time protocol) timing system and a timing method thereof, in particular to an NTP timing system and a timing method thereof of a Beidou-based regional geophysical observer.
Background
At present, most of earthquake geophysical table network instruments are NTP time service or manual time service, and due to the fact that the time keeping precision of the instruments is not high, when the NTP function of the instruments fails, manual time correction is not carried out for a long time or a clock source is wrong, the accuracy of data used for earthquake monitoring and forecasting is affected. Although the medium-long term earthquake prediction allows clock errors within a certain degree, the second-level errors have certain influence on the research result in the processes of short-term earthquake prediction research, synchronous earthquake response research and abnormal tracking analysis research. At present, all geophysical table network instruments run in an industry intranet, cannot be calibrated through a clock server of an extranet, and only can depend on the intranet clock server, so that when 1 clock server is used by all the instruments, a greater risk exists, namely, the clocks of all the instruments are influenced when the clock server breaks down. Therefore, the earthquake system urgently needs a time service system which can not only provide time for the geophysical instrument, but also can not cause clock errors of the instrument of the whole network due to self faults or errors.
The GPS system has the risk of clock turnover, and when the clock turnover occurs in 2019, a large-scale time service interruption clock error is caused; in addition, due to the limitation and control of the chip, many GPS time service chips cannot be used within a certain time, and a new chip needs to be replaced, so that for observation equipment used for a long time, large-area replacement greatly influences normal use along with continuous expansion of the network scale of the earthquake observation platform and continuous maturity and perfection of the Beidou system, and the regional time service system established by combining the trend of future development of earthquake monitoring has great practical value and popularization value. Therefore, it is necessary to design an NTP time service system of a regional geophysical observer based on the big dipper, which can avoid the defects and danger uncertainty of a GPS system through the big dipper time service, and avoid the influence on the instrument clock of the whole network due to the fault of one NTP clock server to the greatest extent.
Disclosure of Invention
The purpose of the invention is as follows: the Beidou-based regional geophysical observer NTP time service system and method can avoid the defects and danger uncertainty of a GPS system through Beidou time service, and avoid the influence on instrument clocks of the whole network due to the fault of one NTP clock server to the greatest extent.
The technical scheme is as follows: the invention relates to a Beidou-based regional geophysical observer NTP time service system, which comprises an equipment cabinet, a geophysical observer, an NTP server, a Beidou antenna and a heat dissipation mechanism, wherein the equipment cabinet is provided with a data acquisition module; a cabinet door is hinged at the front side opening of the equipment cabinet; the heat dissipation mechanism comprises a heat dissipation fan and two heat dissipation units; the two heat dissipation units are arranged in the equipment cabinet at intervals up and down, the heat dissipation fan is arranged on the rear side surface of the equipment cabinet, and the air outlet of the heat dissipation fan is communicated with the two heat dissipation units through an air inlet pipeline; the geophysical observation instrument and the NTP server are respectively arranged on the two heat dissipation units; the Beidou antenna is electrically connected with a radio frequency port of the NTP server through a signal cable; the geophysical observation instrument is in communication connection with the NTP server, and the NTP server monitors and calibrates a clock of the geophysical observation instrument.
Furthermore, a control box and a door handle are arranged on the front side surface of the cabinet door; an electric control lock for locking the cabinet door is arranged on the rear side surface of the opening and closing position of the cabinet door; a controller, a fan driving circuit and a communication module are arranged in the control box; a fingerprint identification module, a display screen, a loudspeaker and an indicator light are arranged on the front side surface of the control box; a temperature sensor is arranged on the heat dissipation unit; the controller is respectively and electrically connected with the temperature sensor, the fingerprint identification module, the display screen, the loudspeaker, the indicator lamp, the electric control lock, the fan driving circuit and the communication module; the fan driving circuit is electrically connected with the heat dissipation fan.
Furthermore, the NTP server comprises a square shell, a time service module, a radio frequency port, a communication interface, a state lamp, a memory and an industrial personal computer; the time service module, the memory and the industrial personal computer are all arranged in the square shell, and the industrial personal computer is respectively and electrically connected with the time service module and the memory; the communication interface is arranged on the rear side surface of the square shell and is electrically connected with an IO signal end of the industrial personal computer; the state lamp is arranged on the front side surface of the square shell and is electrically connected with the state signal end of the time service module; the radio frequency port is electrically connected with a radio frequency signal end of the time service module.
Further, the heat dissipation unit comprises a heat dissipation box body, a top air outlet cover, an air outlet pipeline, a bottom air inlet cover and an air inlet butt joint pipe; the left side and the right side of the bottom of the heat dissipation box body are respectively provided with a sliding strip, the left inner side wall and the right inner side wall of the equipment cabinet are respectively provided with a supporting slide rail, and the two sliding strips are slidably arranged on the supporting slide rails at corresponding positions; a rectangular recess is arranged at the top of the heat dissipation box body, and heat dissipation holes are distributed on the vertical side surface and the bottom side surface of the rectangular recess; the top air outlet cover is fixedly arranged in the equipment cabinet and is positioned above the corresponding rectangular recess; one end of the air outlet pipeline is communicated with the top air outlet cover, the other end of the air outlet pipeline extends out of the equipment cabinet, and a protective net is arranged at the extending end of the air outlet pipeline; the bottom air inlet cover is fixedly arranged at the bottom of the heat dissipation box body and is communicated with the heat dissipation box body; the front end of the air inlet butt joint pipe is communicated with the bottom air inlet cover, and the rear end of the air inlet butt joint pipe is butted with the air inlet pipeline; and a diffusion impeller is rotatably arranged on the inner bottom of the heat dissipation box body and positioned at the communication part of the bottom air inlet cover through an impeller bracket.
Furthermore, the front end of the air inlet pipeline extends into the equipment cabinet, a rear side supporting flange is arranged on the extending end, and a ring-shaped magnet is arranged on the rear side surface of the rear side supporting flange; the rear end of the air inlet butt joint pipe is provided with a front side supporting flange, and the rear side surface of the front side supporting flange is provided with a sealing ring; the rear end of the air inlet butt joint pipe is inserted into the front end of the air inlet pipeline, and the sealing ring is clamped between the rear side support flange and the front side support flange; two flexible buffer pads for respectively pushing and pressing the two heat dissipation box bodies are arranged on the rear side surface of the cabinet door; an air filter screen is arranged at the air inlet of the heat dissipation fan.
Furthermore, an elastic pressing mechanism is arranged on the upper side surface of the heat dissipation box body; the elastic pressing mechanism comprises four elastic pressing units, and each elastic pressing unit comprises a vertical guide post, a vertical sliding sleeve, a vertical pressure spring, a horizontal pressure rod and a horizontal sleeve; vertical guide posts of the four elastic pressing units are respectively and vertically fixedly arranged in the middle of four side edges of the upper side surface of the heat dissipation box body, and supporting convex rings are arranged at the upper ends of the vertical guide posts; the vertical sliding sleeve and the vertical pressure spring are sleeved on the vertical guide post, and a supporting ring piece is arranged at the upper end of the vertical sliding sleeve; the vertical pressure spring is elastically supported between the supporting convex ring and the supporting ring sheet; one end of the horizontal pressure lever is vertically fixed on the vertical sliding sleeve, and the other end of the horizontal pressure lever extends to the upper part of the rectangular recess; horizontal compression springs are sleeved on the two horizontal compression rods on the rear side and the left side, and external threads are arranged on the two horizontal compression rods on the right side and the front side; a pushing ring piece is arranged on the horizontal sleeve, and a pushing gasket is arranged on the pushing side of the pushing ring piece; the two horizontal sleeves are respectively sleeved on the two horizontal pressure rods at the rear side and the left side in a sliding manner, and the horizontal pressure spring is elastically supported between the vertical sliding sleeve and the horizontal sleeve; the other two horizontal sleeves are screwed with the external threads on the two horizontal pressing rods on the right side and the front side respectively through the internal threads.
Further, a stable bracket is arranged on the elastic pressing mechanism and comprises a supporting circular ring, a supporting square rod, a sliding support and two end supports; the lower ends of the four L-shaped rods are respectively inserted into the four supporting holes; a square hole is formed in each of the two end supports, and a supporting spring is arranged in each square hole; two ends of the supporting square rod are respectively inserted into the two square holes, and one end of the supporting square rod is supported on the supporting spring; the two end part supports are supported on the inner ring surface of the supporting ring, and a clamping groove clamped on the supporting ring is arranged at the supporting position; the sliding support is arranged on the supporting square rod in a sliding mode, a positioning bolt is screwed on the sliding support in a threaded mode, and the end portion of a screw rod of the positioning bolt is pressed on the supporting square rod; and a clamping sleeve for inserting the temperature sensor is arranged on the side edge of the sliding support, and a clamping bolt for clamping the temperature sensor is screwed on the pipe wall of the clamping sleeve.
Furthermore, a feeder line arrester is connected in series with a signal cable of the Beidou antenna and is positioned in the protective mounting box; the top of the protection mounting box is provided with an L-shaped mounting plate, the rear side edge of the L-shaped mounting plate extends out of the side surface of the top of the protection mounting box, and a fixed mounting hole is formed in the extending side surface; the bottom of the protective installation box is open; the left outer side surface and the right outer side surface of the protective mounting box are both provided with winding posts, and the suspended ends of the winding posts are provided with wire blocking discs; the left side surface and the right side surface of the protective mounting box are respectively provided with a threading hole which is convenient for the signal cable to penetrate through; a fixed clamping seat is arranged on the inner top of the protective mounting box, and a movable clamping seat is hung and mounted on the lower side surface of the fixed clamping seat through a split clamping bolt; insulating clamping pads are arranged on the lower side surface of the fixed clamping seat and the upper side surface of the movable clamping seat; the feeder arrester is clamped and installed between the upper insulating clamping pad and the lower insulating clamping pad.
Further, the Beidou antenna is arranged on the outdoor mounting rack; the outdoor mounting frame comprises a clamping sleeve head, a lifting adjusting rod, an adjusting sleeve, a lower end supporting rod, two supporting sleeves and four strip-shaped plates; the Beidou antenna is provided with a short plug-in mounting column which is plugged in an upper pipe orifice of the clamping sleeve head; a notch facilitating the entry and exit of the signal cable is arranged on the upper pipe orifice of the clamping sleeve head; a side bolt is screwed on the side wall of the clamping sleeve head in a threaded manner, and the end part of a screw rod of the side bolt is pressed on the short inserting column; the upper end of the lifting adjusting rod is fixedly arranged on the lower end of the clamping sleeve head, and the lower end of the lifting adjusting rod is inserted into the adjusting sleeve; an adjusting and positioning bolt is screwed at the pipe orifice at the upper end of the adjusting sleeve, and the adjusting and positioning bolt is pressed on the lifting adjusting rod; the lower end of the adjusting sleeve is vertically fixed in the middle of the lower end supporting rod, and the two supporting sleeves are respectively sleeved on the two ends of the lower end supporting rod; a guide sliding groove is arranged on the lower end supporting rod, and a guide sliding block which is embedded into the guide sliding groove in a sliding manner is arranged on the inner pipe wall of the supporting sleeve; the end parts of the two strip-shaped plates are arranged on the end part of one supporting sleeve through end bolts, and the end parts of the other two strip-shaped plates are arranged on the end part of the other supporting sleeve through end bolts; friction convex edges are arranged on the strip-shaped plate and the support sleeve and positioned at the mounting position of the end bolt; the side edge of the strip-shaped plate is provided with a side edge fixing strip, and the side edge fixing strip is provided with a waist-shaped hole.
The invention relates to a time service method of a Beidou-based regional geophysical observer NTP time service system, which comprises the following steps of:
ΔT 1 ＝|(T 1 -t 1 )+(T 2 -t 2 )|
and repeating the steps for n times to calculate the final clock error:
ΔT＝(ΔT 1 +ΔT 2 +…+ΔT n )/n
and 4, sequentially selecting the next set of geophysical observation instruments using the same clock source as the current geophysical observation instrument by the industrial personal computer, returning to the step 1 until the clocks of all the geophysical observation instruments using the same clock source are calculated, and then, considering that the time monitoring of the period is finished, and waiting for the time monitoring of the next period.
Compared with the prior art, the invention has the beneficial effects that: the independently installed NTP servers can be used for monitoring and calibrating the clock of the geophysical observation instrument, so that the geophysical observation instrument in the area can work normally, the instrument clock of the whole network is prevented from being influenced due to the fault of one NTP clock server to the maximum extent, and the influence of network delay on the timing precision can be reduced to the maximum extent through the independent regional arrangement of the NTP servers; the Beidou antenna is used for acquiring Beidou data, so that Beidou time service can be realized, and the GPS system is prevented from influencing observation due to clock turnover and chip limitation.
Drawings
FIG. 1 is a front view of the equipment cabinet of the present invention;
FIG. 2 is a left side view of the equipment cabinet of the present invention;
FIG. 3 is a partial sectional view of the inside of the equipment cabinet according to the present invention;
FIG. 4 is a schematic top view of the elastic pressing mechanism of the present invention;
FIG. 5 is a schematic view of the butt joint installation structure of the air inlet butt joint pipe of the present invention;
FIG. 6 is a schematic cross-sectional view of the internal structure of the protective mounting case of the present invention;
FIG. 7 is a left side view of the protective mounting case of the present invention;
FIG. 8 is a schematic view of an outdoor mount configuration of the present invention;
FIG. 9 is a schematic diagram of the circuit structure of the control box of the present invention;
fig. 10 is a schematic circuit diagram of the NTP server according to the present invention.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example 1:
as shown in fig. 1-10, the regional geophysical observer NTP time service system based on the big dipper disclosed in the present invention includes: the device comprises an equipment cabinet 1, a geophysical observation instrument 26, an NTP server 25, a Beidou antenna 65 and a heat dissipation mechanism; a cabinet door 2 is hinged at an opening at the front side of the equipment cabinet 1; the heat dissipation mechanism comprises a heat dissipation fan 10 and two heat dissipation units; the two heat dissipation units are installed in the equipment cabinet 1 at intervals up and down, the heat dissipation fan 10 is installed on the rear side surface of the equipment cabinet 1, and the air outlet of the heat dissipation fan 10 is communicated with the two heat dissipation units through an air inlet pipeline 12; the geophysical observation instrument 26 and the NTP server 25 are respectively installed on the two heat dissipation units; the Beidou antenna 65 is electrically connected with a radio frequency port of the NTP server 25 through a signal cable; the geophysical survey instrument 26 is communicatively connected to the NTP server 25, and the NTP server 25 monitors and calibrates the clock of the geophysical survey instrument 26.
The independently installed NTP server 25 can be used for monitoring and calibrating the clock of the geophysical observation instrument 26, so that the geophysical observation instrument 26 in the area can work normally, the instrument clock of the whole network is prevented from being influenced due to the fault of one NTP clock server to the maximum extent, and the influence of network delay on the timing precision can be reduced to the maximum extent through the independent regional arrangement of the NTP server 25; beidou antenna 65 is used for acquiring Beidou data, so that Beidou time service can be realized, and the influence of GPS system observation due to clock turnover and chip limitation is avoided.
Further, a control box 5 and a door handle 3 are arranged on the front side surface of the cabinet door 2; an electric control lock 4 for locking the cabinet door 2 is arranged on the rear side surface of the opening and closing position of the cabinet door 2; a controller, a fan driving circuit and a communication module are arranged in the control box 5; a fingerprint identification module 6, a display screen 7, a loudspeaker 8 and an indicator light 9 are arranged on the front side surface of the control box 5; a temperature sensor 39 is mounted on the heat radiation unit; the controller is respectively and electrically connected with the temperature sensor 39, the fingerprint identification module 6, the display screen 7, the loudspeaker 8, the indicator light 9, the electric control lock 4, the fan driving circuit and the communication module; the fan drive circuit is electrically connected to the heat dissipation fan 10. The display screen 7 can be used for conveniently displaying the temperature monitored in real time; the fingerprint identification module 6 can be used for identifying the identity of an administrator, so that the electric control lock 4 can be safely opened; the use of the speaker 8 and the indicator light 9 can indicate when the temperature exceeds a set temperature threshold.
Further, the NTP server 25 includes a square housing, a time service module, a radio frequency port, a communication interface, a status light, a memory, and an industrial personal computer; the time service module, the memory and the industrial personal computer are all arranged in the square shell, and the industrial personal computer is respectively and electrically connected with the time service module and the memory; the communication interface is arranged on the rear side surface of the square shell and is electrically connected with an IO signal end of the industrial personal computer; the state lamp is arranged on the front side surface of the square shell and is electrically connected with the state signal end of the time service module; the radio frequency port is electrically connected with a radio frequency signal end of the time service module. By means of the cooperation of the time service module and the Beidou antenna 65, Beidou time service data can be acquired.
Further, the heat dissipation unit comprises a heat dissipation box body 17, a top air outlet cover 15, an air outlet pipeline 13, a bottom air inlet cover 16 and an air inlet butt joint pipe 48; the left side and the right side of the bottom of the heat dissipation box body 17 are respectively provided with a sliding strip 22, the left inner side wall and the right inner side wall of the equipment cabinet 1 are respectively provided with a supporting slide rail 21, and the two sliding strips 22 are slidably arranged on the supporting slide rails 21 at corresponding positions; a rectangular recess 20 is arranged at the top of the heat dissipation box body 17, and heat dissipation holes 24 are respectively distributed on the vertical side surface and the bottom side surface of the rectangular recess 20; the top air outlet cover 15 is fixedly arranged in the equipment cabinet 1 and is positioned above the corresponding rectangular recess 20; one end of the air outlet pipeline 13 is communicated with the top air outlet cover 15, the other end extends out of the equipment cabinet 1, and a protective net 14 is arranged at the extending end; the bottom air inlet cover 16 is fixedly arranged at the bottom of the heat radiation box body 17 and is communicated with the heat radiation box body 17; the front end of the air inlet butt joint pipe 48 is communicated with the bottom air inlet cover 16, and the rear end is butted with the air inlet pipeline 12; a diffusion impeller 19 is rotatably mounted on the inner bottom of the heat radiation box 17 at the communication position of the bottom air inlet cover 16 through an impeller bracket 18. The air inlet butt joint pipe 48 is butt-jointed with the air inlet pipeline 12, so that the heat dissipation box body 17 is pulled out to conveniently take and place the geophysical observation instrument 26 or the NTP server 25; the sliding strip 22 is matched with the supporting sliding rail 21, so that the heat dissipation box body 17 can be conveniently pushed and pulled; the heat dissipation effect of the instrument and equipment can be enhanced by utilizing the heat dissipation holes 24 arranged on the side surfaces of the rectangular recess 20; the top air outlet cover 15 is used for conveniently collecting and discharging the heat dissipation airflow out of the equipment cabinet 1; the diffusion of the air flow can be facilitated by the diffusion impeller 19, so that the air flow can flow to the respective heat dissipation holes 24 on the vertical side.
Further, the front end of the air inlet pipe 12 extends into the equipment cabinet 1, a rear side supporting flange 50 is arranged on the extending end, and a ring-shaped magnet 51 is arranged on the rear side surface of the rear side supporting flange 50; the rear end of the air inlet butt joint pipe 48 is provided with a front side supporting flange 49, and the rear side surface of the front side supporting flange 49 is provided with a sealing ring 52; the rear end of the air inlet butt joint pipe 48 is inserted into the front end of the air inlet pipeline 12, and the sealing ring 52 is clamped between the rear side support flange 50 and the front side support flange 49; two flexible buffer cushions 23 for respectively pushing and pressing the two heat dissipation box bodies 17 are arranged on the rear side surface of the cabinet door 2; an air filter screen 11 is arranged at an air inlet of the heat dissipation fan 10. The front side support flange 49 and the rear side support flange 50 can be attracted and relatively clamped by the ring-shaped magnet 51; the sealing performance of the butt joint installation part can be enhanced by the sealing ring 52; the flexible buffer cushion 23 can press the front side of the heat dissipation box 17 to ensure the butt joint tightness between the air inlet butt joint pipe 48 and the air inlet pipeline 12.
Furthermore, an elastic pressing mechanism is arranged on the upper side surface of the heat radiation box body 17; the elastic pressing mechanism comprises four elastic pressing units, and each elastic pressing unit comprises a vertical guide post 27, a vertical sliding sleeve 29, a vertical pressure spring 34, a horizontal pressure rod 28 and a horizontal sleeve 30; the vertical guide posts 27 of the four elastic pressing units are respectively and vertically and fixedly arranged in the middle of the four side edges of the upper side surface of the heat radiation box body 17, and the upper ends of the vertical guide posts 27 are provided with supporting convex rings 36; the vertical sliding sleeve 29 and the vertical compression spring 34 are sleeved on the vertical guide post 27, and a supporting ring piece 33 is arranged at the upper end of the vertical sliding sleeve 29; the vertical compression spring 34 is elastically supported between the supporting convex ring 36 and the supporting ring piece 33; one end of the horizontal pressure lever 28 is vertically fixed on the vertical sliding sleeve 29, and the other end extends to the upper part of the rectangular recess 20; the two horizontal compression rods 28 on the rear side and the left side are respectively sleeved with a horizontal compression spring 35, and the two horizontal compression rods 28 on the right side and the front side are respectively provided with an external thread 37; a pushing ring piece 31 is arranged on the horizontal sleeve 30, and a pushing gasket 32 is arranged on the pushing side of the pushing ring piece 31; the two horizontal sleeves 30 are respectively sleeved on the two horizontal compression bars 28 at the rear side and the left side in a sliding manner, and the horizontal compression spring 35 is elastically supported between the vertical sliding sleeve 29 and the horizontal sleeve 30; the other two horizontal sleeves 30 are screwed with the external threads 37 on the two horizontal pressing rods 28 on the right side and the front side respectively through internal threads. The use of the vertical sliding sleeve 29 can facilitate the rotation of the horizontal strut 28, thereby facilitating the placement or removal of the geophysical observation instrument 26 or NTP server 25 within the rectangular recess 20; the vertical compression spring 34 can be used for conveniently and elastically pressing the horizontal compression bar 28, so that the top of the geophysical observation instrument 26 or the NTP server 25 can be pressed; the pushing ring piece 31 can be conveniently and elastically pushed by using the horizontal compression spring 35, so that pushing of the side surfaces of the geophysical observation instruments 26 or the NTP server 25 with different sizes is met, and stability in placement and use is ensured; the two horizontal sleeves 30 are respectively connected with the external threads 37 on the two horizontal pressing rods 28 on the right side and the front side through internal threads, so that stable support on one side is provided, and elastic clamping is carried out on the horizontal pressing springs 35.
Further, a stable bracket is arranged on the elastic pressing mechanism, and comprises a supporting circular ring 38, a supporting square rod 43, a sliding support 44 and two end supports 40; an L-shaped rod 42 is arranged at the circumference quartering point of the supporting ring 38, supporting holes 41 are arranged at the extending end parts of the four horizontal pressure rods 28, and the lower ends of the four L-shaped rods 42 are respectively inserted into the four supporting holes 41; a square hole is formed in each of the two end supports 40, and a support spring is mounted in each square hole; two ends of the supporting square rod 43 are respectively inserted into the two square holes, and one end of the supporting square rod is supported on the supporting spring; the two end supports 40 are supported on the inner annular surface of the supporting ring 38, and are provided with clamping grooves clamped on the supporting ring 38 at supporting positions; the sliding support 44 is slidably mounted on the supporting square rod 43, a positioning bolt 45 is screwed on the sliding support 44 in a threaded manner, and the end part of the screw rod of the positioning bolt 45 is pressed on the supporting square rod 43; a clamping sleeve 46 for inserting the temperature sensor 39 is arranged on the side edge of the sliding support 44, and a clamping bolt 47 for clamping the temperature sensor 39 is screwed on the pipe wall of the clamping sleeve 46. By means of the matched arrangement of the supporting circular ring 38 and the four L-shaped rods 42, the extending ends of the four horizontal compression rods 28 can be uniformly fixed, and the stability of the elastic pressing mechanism for pressing the instrument equipment in the rectangular recess 20 is enhanced, so that the vibration of heat dissipation airflow on the instrument equipment is reduced, and the stable operation of the instrument is ensured; the temperature sensor 39 can be conveniently installed and the installation position of the temperature sensor 39 can be adjusted by utilizing the matching arrangement of the two end supports 40, the supporting square rod 43, the sliding support 44 and the clamping sleeve 46, so that the temperature can be monitored at a main heating point according to the requirement; the support square bar 43 can be easily attached or detached by using the support spring.
Further, a feeder line arrester 61 is connected to a signal cable of the Beidou antenna 65 in series, and the feeder line arrester 61 is detachably mounted in the protective mounting box 53. The lightning arrester 61 can be used for playing a lightning protection effect on the signal of the Beidou antenna 65; utilize external setting of big dipper antenna 65 can not cause trouble such as time service module damage and short circuit because of the gathering of trace steam, have better water-proof effects.
Further, an L-shaped mounting plate 55 is arranged at the top of the protective mounting box 53, the rear side edge of the L-shaped mounting plate 55 extends out of the top side surface of the protective mounting box 53, and a fixed mounting hole 56 is arranged on the extending side surface; the bottom of the protective mounting box 53 is open; the left outer side surface and the right outer side surface of the protective mounting box 53 are both provided with winding posts 58, and the suspension ends of the winding posts 58 are provided with wire blocking discs 54; threading holes 57 which are convenient for signal cables to penetrate through are formed in the left side surface and the right side surface of the protective mounting box 53; a fixed clamping seat 59 is arranged on the inner top of the protective mounting box 53, and a movable clamping seat 62 is hung and mounted on the lower side surface of the fixed clamping seat 59 through a split clamping bolt 63; insulating clamping pads 60 are arranged on the lower side surface of the fixed clamping seat 59 and the upper side surface of the movable clamping seat 62; the feeder arrester 61 is clamped between the upper and lower insulating clamping pads 60. The rear side edge of the L-shaped mounting plate 55 is used for extending and mounting, so that the wrapping post 58 can conveniently wind a signal cable of the Beidou antenna 65 after mounting; the feeder line arrester 61 can be maintained conveniently by a detachable structure composed of the fixed clamping seat 59, the movable clamping seat 62 and the split clamping bolt 63.
Further, the Beidou antenna 65 is mounted on an outdoor mounting rack; the outdoor mounting frame comprises a clamping sleeve head 67, a lifting adjusting rod 70, an adjusting sleeve 71, a lower end supporting rod 73, two supporting sleeves 75 and four strip-shaped plates 77; the Beidou antenna 65 is provided with a plug-in short column 66, and the plug-in short column 66 is plugged in an upper pipe orifice of the clamping sleeve head 67; a notch 68 for facilitating the signal cable to enter and exit is arranged on the upper pipe orifice of the clamping sleeve head 67; a side bolt 69 is screwed on the side wall of the clamping sleeve head 67, and the end part of the screw rod of the side bolt 69 is pressed on the inserting short column 66; the upper end of the lifting adjusting rod 70 is fixedly arranged on the lower end of the clamping sleeve head 67, and the lower end of the lifting adjusting rod 70 is inserted into the adjusting sleeve 71; an adjusting and positioning bolt 72 is screwed at the upper end pipe orifice of the adjusting sleeve 71, and the adjusting and positioning bolt 72 is pressed on the lifting adjusting rod 70; the lower end of the adjusting sleeve 71 is vertically fixed in the middle of the lower end support rod 73, and the two support sleeves 75 are respectively sleeved on the two ends of the lower end support rod 73; a guide sliding groove 74 is arranged on the lower end support rod 73, and a guide sliding block which is slidably embedded in the guide sliding groove 74 is arranged on the inner pipe wall of the support sleeve 75; the end parts of the two strip-shaped plates 77 are arranged on the end part of one supporting sleeve 75 through end bolts 76, and the end parts of the other two strip-shaped plates 77 are arranged on the end part of the other supporting sleeve 75 through end bolts 76; friction ribs 80 are arranged on the strip-shaped plate 77 and the support sleeve 75 at the mounting positions of the end bolts 76; a side fixing strip 78 is provided at the side of the strip plate 77, and a kidney-shaped hole 79 is provided in the side fixing strip 78. The two strip-shaped plates 77 are installed by the end bolts 76, so that the clamping angle of the two strip-shaped plates 77 can be adjusted conveniently, and the requirements of various installation environments are met; the height of the Beidou antenna 65 can be conveniently adjusted by matching the lifting adjusting rod 70 with the adjusting sleeve 71; the support sleeve 75 and the lower end support rod 73 are inserted and matched, so that the support range of the lower portion can be enlarged, and the support stability of the Beidou antenna 65 is enhanced.
In the NTP time service system of the Beidou-based regional geophysical observer, the controller adopts the existing single-chip microcomputer control module and is used for realizing coordination control; the fingerprint identification module 6 adopts the existing fingerprint identification module and is used for identifying the fingerprint information of the administrator; the communication module adopts wired network communication wireless network communication, so that an administrator can conveniently obtain temperature information; the temperature sensor 39 is an existing digital temperature sensor; the electric control lock 4 adopts the existing electromagnetic push rod type electric control lock; the fan driving circuit is an existing motor driving circuit and is used for driving the cooling fan 10; the industrial personal computer adopts the existing industrial personal computer module and is provided with a CPU, a COM port, a VGA display interface, a USB interface and other module circuits; the memory adopts the existing hard disk module; the time service module adopts a time service board matched with the Beidou antenna 65, such as a UM220-IV dual-mode module; the industrial personal computer receives and analyzes time data of the time service module through the COM port, gives the analyzed time to local time in real time, executes the time for 1 time per second, ensures the accuracy of the local time, monitors and calibrates a clock of the geophysical observation instrument 26 through a network interface, ensures the accurate operation of NTP service, supports remote desktop access and can be remotely controlled through VNC software; the Beidou antenna 65 adopts the existing GPS \ Beidou dual-mode antenna; the feeder line arrester 61 has a frequency of 0-2 GHz, a standing wave of not less than 1.2 and an insertion loss of not more than 0.2 dB.
When the regional geophysical observation instrument NTP time service system based on the Beidou disclosed by the invention works, satellite data are obtained by a time service module, the industrial personal computer analyzes the satellite data to obtain time data, and the industrial personal computer monitors and calibrates a clock of a geophysical observation instrument 26 through a network interface; when the temperature sensor 39 collects the temperature in real time and the controller judges that the temperature exceeds the set temperature threshold, the heat radiation fan 10 is controlled to start working, so that the NTP server 25 and the geophysical observation instrument 26 are rapidly cooled through the heat radiation box 17, and the system is ensured to operate reliably and stably.
The invention also provides a time service method of the regional geophysical observer NTP time service system based on the Beidou, which comprises the following steps:
ΔT 1 ＝|(T 1 -t 1 )+(T 2 -t 2 )|
and repeating the steps for n times to calculate the final clock error:
ΔT＝(ΔT 1 +ΔT 2 +…+ΔT n )/n
and 4, sequentially selecting the next set of geophysical observation instruments 26 using the same clock source as the current geophysical observation instrument 26 by the industrial personal computer, returning to the step 1 until the clocks of all the geophysical observation instruments 26 using the same clock source are calculated, judging that the time monitoring of the period is finished, waiting for the time monitoring of the next period, wherein the time interval of each period can be defined by self and is usually a multiple of 5 minutes.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a regional formula geophysical observation appearance NTP time service system based on big dipper which characterized in that: the device comprises an equipment cabinet (1), a geophysical observation instrument (26), an NTP server (25), a Beidou antenna (65) and a heat dissipation mechanism; a cabinet door (2) is hinged at an opening at the front side of the equipment cabinet (1); the heat dissipation mechanism comprises a heat dissipation fan (10) and two heat dissipation units; the two heat dissipation units are arranged in the equipment cabinet (1) at intervals up and down, the heat dissipation fan (10) is arranged on the rear side surface of the equipment cabinet (1), and the air outlet of the heat dissipation fan (10) is communicated with the two heat dissipation units through an air inlet pipeline (12); the geophysical observation instrument (26) and the NTP server (25) are respectively arranged on the two heat dissipation units; the Beidou antenna (65) is electrically connected with a radio frequency port of the NTP server (25) through a signal cable; the geophysical observation instrument (26) is in communication connection with the NTP server (25), and the NTP server (25) monitors and calibrates the clock of the geophysical observation instrument (26);
the NTP server (25) comprises a square shell, a time service module, a radio frequency port, a communication interface, a state lamp, a memory and an industrial personal computer; the time service module, the memory and the industrial personal computer are all arranged in the square shell, and the industrial personal computer is respectively and electrically connected with the time service module and the memory; the communication interface is arranged on the rear side surface of the square shell and is electrically connected with an IO signal end of the industrial personal computer; the state lamp is arranged on the front side surface of the square shell and is electrically connected with the state signal end of the time service module; the radio frequency port is electrically connected with a radio frequency signal end of the time service module;
the heat dissipation unit comprises a heat dissipation box body (17), a top air outlet cover (15), an air outlet pipeline (13), a bottom air inlet cover (16) and an air inlet butt joint pipe (48); the left side and the right side of the bottom of the heat dissipation box body (17) are respectively provided with a sliding strip (22), the left inner side wall and the right inner side wall of the equipment cabinet (1) are respectively provided with a supporting sliding rail (21), and the two sliding strips (22) are arranged on the supporting sliding rails (21) at corresponding positions in a sliding manner; a rectangular recess (20) is arranged at the top of the heat dissipation box body (17), and heat dissipation holes (24) are distributed on the vertical side surface and the bottom side surface of the rectangular recess (20) respectively; the top air outlet cover (15) is fixedly arranged in the equipment cabinet (1) and is positioned above the corresponding rectangular recess (20); one end of the air outlet pipeline (13) is communicated with the top air outlet cover (15), the other end of the air outlet pipeline extends out of the equipment cabinet (1), and a protective net (14) is arranged at the extending end; the bottom air inlet cover (16) is fixedly arranged at the bottom of the heat radiation box body (17) and is communicated with the heat radiation box body (17); the front end of the air inlet butt joint pipe (48) is communicated with the bottom air inlet cover (16), and the rear end is butted with the air inlet pipeline (12); a diffusion impeller (19) is rotatably arranged on the inner bottom of the heat dissipation box body (17) and at the communication position of the bottom air inlet cover (16) through an impeller bracket (18).
2. The Beidou-based regional geophysical observer NTP time service system according to claim 1, wherein: a control box (5) and a door handle (3) are arranged on the front side surface of the cabinet door (2); an electric control lock (4) for locking the cabinet door (2) is arranged on the rear side surface of the opening and closing position of the cabinet door (2); a controller, a fan driving circuit and a communication module are arranged in the control box (5); a fingerprint identification module (6), a display screen (7), a loudspeaker (8) and an indicator light (9) are arranged on the front side surface of the control box (5); a temperature sensor (39) is mounted on the heat dissipation unit; the controller is respectively and electrically connected with the temperature sensor (39), the fingerprint identification module (6), the display screen (7), the loudspeaker (8), the indicator lamp (9), the electric control lock (4), the fan driving circuit and the communication module; the fan driving circuit is electrically connected with the heat radiation fan (10).
3. The Beidou based regional geophysical observer NTP time service system of claim 1, wherein: the front end of the air inlet pipeline (12) extends into the equipment cabinet (1), a rear side supporting flange (50) is arranged at the extending end, and an annular magnet (51) is arranged on the rear side surface of the rear side supporting flange (50); the rear end of the air inlet butt joint pipe (48) is provided with a front side supporting flange (49), and the rear side surface of the front side supporting flange (49) is provided with a sealing ring (52); the rear end of the air inlet butt joint pipe (48) is inserted into the front end of the air inlet pipeline (12), and the sealing ring (52) is clamped between the rear side support flange (50) and the front side support flange (49); two flexible buffer cushions (23) for respectively pushing and pressing the two heat dissipation box bodies (17) are arranged on the rear side surface of the cabinet door (2); an air filter screen (11) is arranged at the air inlet of the heat dissipation fan (10).
4. The Beidou-based regional geophysical observer NTP time service system according to claim 1, wherein: an elastic pressing mechanism is arranged on the upper side surface of the heat dissipation box body (17); the elastic pressing mechanism comprises four elastic pressing units, and each elastic pressing unit comprises a vertical guide post (27), a vertical sliding sleeve (29), a vertical pressure spring (34), a horizontal pressure rod (28) and a horizontal sleeve (30); vertical guide posts (27) of the four elastic pressing units are respectively vertically and fixedly arranged in the middle of four side edges of the upper side surface of the heat dissipation box body (17), and supporting convex rings (36) are arranged at the upper ends of the vertical guide posts (27); the vertical sliding sleeve (29) and the vertical compression spring (34) are sleeved on the vertical guide post (27), and a supporting ring piece (33) is arranged at the upper end of the vertical sliding sleeve (29); the vertical compression spring (34) is elastically supported between the supporting convex ring (36) and the supporting ring piece (33); one end of the horizontal pressure lever (28) is vertically fixed on the vertical sliding sleeve (29), and the other end extends above the rectangular recess (20); the two horizontal compression rods (28) on the rear side and the left side are respectively sleeved with a horizontal compression spring (35), and the two horizontal compression rods (28) on the right side and the front side are respectively provided with an external thread (37); a pushing ring piece (31) is arranged on the horizontal sleeve (30), and a pushing gasket (32) is arranged on the pushing side of the pushing ring piece (31); the two horizontal sleeves (30) are respectively sleeved on the two horizontal pressure rods (28) at the rear side and the left side in a sliding manner, and the horizontal pressure spring (35) is elastically supported between the vertical sliding sleeve (29) and the horizontal sleeves (30); the other two horizontal sleeves (30) are screwed with the external threads (37) on the two horizontal pressing rods (28) on the right side and the front side respectively through the internal threads.
5. The Beidou based regional geophysical observer NTP time service system of claim 4, wherein: a stable bracket is arranged on the elastic pressing mechanism and comprises a supporting circular ring (38), a supporting square rod (43), a sliding support (44) and two end supports (40); the circumference quartering point of the supporting ring (38) is provided with an L-shaped rod (42), the extending end parts of the four horizontal pressure rods (28) are provided with supporting holes (41), and the lower ends of the four L-shaped rods (42) are respectively inserted into the four supporting holes (41); a square hole is arranged on each of the two end supports (40), and a supporting spring is arranged in each square hole; two ends of the supporting square rod (43) are respectively inserted into the two square holes, and one end of the supporting square rod is supported on the supporting spring; the two end supports (40) are supported on the inner ring surface of the supporting ring (38), and are provided with clamping grooves clamped on the supporting ring (38) at supporting positions; the sliding support (44) is arranged on the supporting square rod (43) in a sliding mode, a positioning bolt (45) is arranged on the sliding support (44) in a threaded screwing mode, and the end portion of a screw rod of the positioning bolt (45) is pressed on the supporting square rod (43); a clamping sleeve (46) for inserting the temperature sensor (39) is arranged on the side edge of the sliding support (44), and a clamping bolt (47) for clamping the temperature sensor (39) is screwed on the pipe wall of the clamping sleeve (46).
6. The Beidou based regional geophysical observer NTP time service system of claim 1, wherein: a feeder line arrester (61) is connected in series with a signal cable of the Beidou antenna (65), and the feeder line arrester (61) is positioned in the protection mounting box (53); an L-shaped mounting plate (55) is arranged at the top of the protective mounting box (53), the rear side edge of the L-shaped mounting plate (55) extends out of the side surface of the top of the protective mounting box (53), and a fixed mounting hole (56) is arranged on the extending side surface; the bottom of the protective mounting box (53) is open; the left outer side and the right outer side of the protective mounting box (53) are both provided with winding posts (58), and the suspended ends of the winding posts (58) are provided with wire blocking discs (54); threading holes (57) which are convenient for signal cables to penetrate through are formed in the left side surface and the right side surface of the protective mounting box (53); a fixed clamping seat (59) is arranged on the inner top of the protective mounting box (53), and a movable clamping seat (62) is hung and mounted on the lower side surface of the fixed clamping seat (59) through a split clamping bolt (63); insulating clamping pads (60) are arranged on the lower side surface of the fixed clamping seat (59) and the upper side surface of the movable clamping seat (62); the feeder line arrester (61) is clamped and installed between the upper and lower insulating clamping pads (60).
7. The Beidou based regional geophysical observer NTP time service system of claim 1, wherein: the Beidou antenna (65) is arranged on the outdoor mounting rack; the outdoor mounting frame comprises a clamping sleeve head (67), a lifting adjusting rod (70), an adjusting sleeve (71), a lower end supporting rod (73), two supporting sleeves (75) and four strip-shaped plates (77); the Beidou antenna (65) is provided with a plug-in short column (66), and the plug-in short column (66) is plugged in an upper pipe orifice of the clamping sleeve head (67); a notch (68) which is convenient for the signal cable to enter and exit is arranged on the upper pipe orifice of the clamping sleeve head (67); a side bolt (69) is screwed on the side wall of the clamping sleeve head (67), and the end part of the screw rod of the side bolt (69) is pressed on the inserting short column (66); the upper end of the lifting adjusting rod (70) is fixedly arranged on the lower end of the clamping sleeve head (67), and the lower end of the lifting adjusting rod (70) is inserted into the adjusting sleeve (71); an adjusting and positioning bolt (72) is screwed at the pipe orifice at the upper end of the adjusting sleeve (71), and the adjusting and positioning bolt (72) is pressed on the lifting adjusting rod (70); the lower ends of the adjusting sleeves (71) are vertically fixed in the middle of the lower end support rod (73), and the two support sleeves (75) are respectively sleeved on the two ends of the lower end support rod (73); a guide sliding groove (74) is arranged on the lower end support rod (73), and a guide sliding block which is embedded into the guide sliding groove (74) in a sliding manner is arranged on the inner pipe wall of the support sleeve (75); the end parts of the two strip-shaped plates (77) are arranged on the end part of one supporting sleeve (75) through end bolts (76), and the end parts of the other two strip-shaped plates (77) are arranged on the end part of the other supporting sleeve (75) through end bolts (76); friction ribs (80) are arranged on the strip-shaped plate (77) and the support sleeve (75) and are positioned at the mounting positions of the end bolts (76); the side edge of the strip-shaped plate (77) is provided with a side edge fixing strip (78), and the side edge fixing strip (78) is provided with a waist-shaped hole (79).
8. The time service method of the NTP time service system of the Beidou based regional geophysical observer according to claim 1, comprising the following steps:
step 1, an industrial personal computer synchronously acquires the instrument time T of the current geophysical observation instrument (26) 1 And the time T of the clock source of the Beidou clock source received by the time service module 2 (ii) a Then the industrial personal computer synchronously sends PING commands to the current geophysical observation instrument (26) and the time service module, and then the average delay t from the industrial personal computer to the current geophysical observation instrument (26) is calculated according to the returned data packet 1 And the average time delay t from the industrial personal computer to the time service module 2 Then, the clock error between the geophysical observation instrument (26) and the time service module is calculated:
ΔT 1 =|(T 1 -t 1 )+(T 2 -t 2 )|
and repeating the steps for n times to calculate the final clock error:
ΔT=（ΔT 1 +ΔT 2 +…+ΔT n ）/n
step 2, judging delta T and T T The magnitude relation of (1), t T If Δ T is less than or equal to T for the set time threshold T If so, the time is considered to be normal; if Δ T is greater than T T The industrial personal computer obtains the clock source time T again, immediately modifies the current time of the geophysical observation instrument (26) by using the clock setting command, and adds T + T 2 Giving the current geophysical survey instrument (26) instrument time, and proceedingLogging, entering step 3 if the time of the instrument is successfully given, and pushing alarm information to prompt that the time cannot be corrected if the time of the instrument is failed, and entering step 4;
step 3, executing step 1 again, if Δ T is still larger than T T If the current clock difference of the geophysical observation instrument (26) is delta T seconds, the industrial personal computer alarms and pushes alarm information to prompt that the clock difference is delta T seconds;
and 4, sequentially selecting a next set of geophysical observation instruments (26) using the same clock source as the current geophysical observation instruments (26) by the industrial personal computer, returning to the step 1 until the clocks of all the geophysical observation instruments (26) using the same clock source are calculated, determining that the time monitoring of the period is finished, and waiting for the time monitoring of the next period.
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