CN201438332U - High-speed remote wireless transmission device for geotechnical engineering on-site monitoring - Google Patents
High-speed remote wireless transmission device for geotechnical engineering on-site monitoring Download PDFInfo
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- CN201438332U CN201438332U CN200920227466XU CN200920227466U CN201438332U CN 201438332 U CN201438332 U CN 201438332U CN 200920227466X U CN200920227466X U CN 200920227466XU CN 200920227466 U CN200920227466 U CN 200920227466U CN 201438332 U CN201438332 U CN 201438332U
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Abstract
The utility model discloses a high-speed remote wireless transmission device for geotechnical engineering on-site monitoring, and relates to a high-speed remote wireless transmission technology. The device comprises a data acquisition and transmission control module (10), a high-speed remote wireless transmission module (20) and a data transmission receiving and control module (30) which are connected in sequence, wherein the data acquisition and transmission control module (10) consists of a data acquisition device (11) and a transmission controller (12) which are connected in sequence, the high-speed remote wireless transmission module (20) consists of a wireless access point (21), a wireless network bridge (22) and a relay network bridge (23) which are connected in sequence, and the data transmission receiving and control module (30) consists of a switch (31), a control terminal computer (32) and remote transmission control software (33) which are connected in sequence. The utility model has the advantages of ultrahigh transmission speed, ultralong transmission distance, flexible networking as well as high expandability, applicability and degree of data safety, and can solve the problem of the real-time and high-speed remote wireless transmission of geotechnical engineering monitoring data, thereby realizing the real-time and high-speed remote measuring on the deformation of geotechnical engineering buildings under severe environments.
Description
Technical field
The utility model relates to a kind of high-speed remote wireless transmission device based on IEEE 802.11a wireless transmission protocol and Wi-Fi, WLAN wireless access technology and short-wave communication tedhnology, relates in particular to a kind of geotechnical engineering field monitoring high-speed remote wireless transmission device.
Background technology
Monitoring rock and soil engineering is an important component part of Geotechnical Engineering, in design, constructing and moving each stage all plays an important role, being to guarantee geotechnical engineering construction and the requisite technical measures of security of operation, is to improve the key link of Geotechnical Engineering method for designing and the important evidence of construction and running technology decision-making.Safety monitoring in recent years is used widely in industries such as water conservancy and hydropower, worker China Democratic National Construction Association, railway traffic, coal mine and military project and develop, and is subjected to the attention of engineering technical personnel and engineering decision at different levels mechanism day by day.Therefore, the innovation of monitoring rock and soil engineering technology and the invention of monitoring equipment will effectively promote the development of Geotechnical Engineering.
Because the complicacy and the diversity of Geotechnical Engineering geologic condition, can't also can not be in the situation in project engineering stage predictive engine construction like clockwork and the operational process, engineering accident and disaster be generation frequently still.In time, before accident, obtain engineering project deformation or destruction information and judge accurately that in view of the above taking the effective precautionary measures is the fundamental purpose of Geotechnical Engineering safety monitoring with what avoid disaster exactly.The develop rapidly of modern science and technology, promoted the update of monitoring technology means, realized monitoring automation for traditional artificial observation technology such as the just progressively alternative transit of the modern ground survey technology of representative, total powerstations as robot measurement, automatic GPS, ground 3 D laser scanning; With tiltmeter, sedimentometer and strainometer etc. is that the underground observation monitoring technology of representative also just progressively realizes digitizing, robotization and networking, monitoring will be in real time, continuously, efficient, dynamically, the direction of robotization and networking develops.The development of multiple network technology such as cable network communication, radio mobile communication and satellite communication is also progressively observed the real time remote transmission and the integrated of field control system of monitoring information for engineering project deformation and is provided the foundation.
Though, monitoring technology and monitoring equipment that China is present have all been made significant headway, but traditional artificial optical measurement, method for electromagnetically measuring and hand-kept observation data methods such as transit, total powerstation, tiltmeter, sedimentometer and strainometer are still mainly adopted in a large amount of Geotechnical Engineering safety monitoring of China, make monitoring still very arduous and heavy, the continuous acquisition of continuous monitoring under especially arduous in condition, the environment rugged environment, data and monitoring in real time then more are difficult to realize.Progress along with network technology, adopt the real-time monitoring of network layout form to solve a real-time monitoring and a remote measurement difficult problem to a certain extent, but the wiring difficulty of netting twine wiring monitoring and rapid wear problem and first current cost and maintenance cost problem are outstanding, have restricted its further application.GPRS and CDMA technology are applied to monitoring gradually in recent years, have tentatively realized the long distance wireless transmission of Monitoring Data.But there are the not enough defective of tangible bandwidth in the GPRS of wireless monitoring technology employing at present and CDMA technology, only several Kbps of message transmission rate are to tens Kbps, the video transmission per second has only several frames even can't transmit, especially the remote location far away in the distance base station, weak output signal, connection and transfer rate significantly reduce, and occur breakpoint and wireless receiving dead angle easily.Even if wireless telemetering realizes that effect then is difficult to satisfactory.Though New-type radio communication technology such as WLAN, Wi-Fi, Wimax and microwave communication etc. are at transmission bandwidth and set up aspects such as difficulty, maintenance cost and all possess very big advantage, market outlook and capacity are very considerable but based on the Geotechnical Engineering high-speed remote wireless monitor of New-type radio communication technology seldom even just at the early-stage.
Summary of the invention
The purpose of this utility model just is to have overcome GPRS and CDMA technology bandwidth deficiency in the existing wireless monitoring technology, base station dependence greatly, especially segment signal off the beaten track far away is faint in the distance base station, shortcomings such as percent of call completed and transfer rate are low provide a kind of geotechnical engineering field monitoring high-speed remote wireless transmission device and method thereof.The device weatherability is good, possess the defeated distance of superelevation transfer rate and super teletransmission; Simultaneously networking flexibility, extendability are strong, quick for installation and easy to maintenance, have solved the high-speed remote wireless transmission problem of monitoring rock and soil engineering data, have realized that environment is abominable, the Geotechnical Engineering remote high-speed wireless telemetering in the arduous place of condition.
The purpose of this utility model is to realize like this.
Round-the-clock wireless bridge/access point and the wireless high-speed between the repeater bridge by transmission control unit (TCU), integration of wireless network access technique and wireless network transmissions function connect; Perhaps by transmission control unit (TCU) be connected based on the wireless high-speed between WAP, wireless bridge and the repeater bridge of WLAN WAP (wireless access protocol), a large amount of monitoring materials with the storage of geotechnical engineering field monitoring data collecting instrument, transfer to switch and control end computing machine with the high transfer rate remote-wireless, thereby remote high-speed obtains on-the-spot monitoring materials, know, judge the variation of monitoring thing safety proterties, for safety management and decision-making section provide real-time Monitoring Data and basis for estimation; And the steering order of control end computing machine returned the data collecting instrument of field monitoring at a high speed, initial setting, the sampling of carrying out data collecting instrument is provided with and operations such as real-time sampling.This device has overcome GPRS and CDMA technology bandwidth deficiency in the existing wireless monitoring technology, base station dependence greatly, especially segment signal off the beaten track far away is faint in the distance base station, shortcoming such as percent of call completed and transfer rate are low; The device weatherability is good, possess the defeated distance of superelevation transfer rate and super teletransmission; Simultaneously networking flexibility, extendability are strong, quick for installation and easy to maintenance, have solved the high-speed remote wireless transmission problem of monitoring rock and soil engineering data, have realized that environment is abominable, the Geotechnical Engineering remote high-speed wireless telemetering in the arduous place of condition.
One, geotechnical engineering field monitoring high-speed remote wireless transmission device (abbreviation device)
Data acquisition that connects successively before and after this device comprises and transmission control module, two-forty long distance wireless transport module and data transmission receive control module;
Described data acquisition and transmission control module are made up of preceding latter linked data collecting instrument and transmission control unit (TCU), mainly finish collection, storage and the transmission wait task of Monitoring Data;
Described two-forty long distance wireless transport module is made up of WAP, wireless bridge and the repeater bridge of front and back wireless communications, also can adopt the round-the-clock wireless bridge/access point and the wireless high-speed between the repeater bridge of integration of wireless network access technique and wireless network transmissions function to connect, finish the remote high-speed wireless transmission of high-speed radio connection and monitoring materials;
Described data transmission receives control module and is made up of preceding latter linked switch and control end computing machine, the control end computing machine is controlled by the remote transmission Control Software, mainly finish reception, the processing of field monitoring data, and the high-speed remote transmission of passing through steering order realizes the two-forty remote wireless control of field monitoring, realization remote high-speed wireless telemetering.
The principle of work of this device is:
Data collecting instrument obtains the digital sensor deformation values of each measuring point, give digital the demonstration or storage, and be connected based on the transmission control unit (TCU) of the data high-speed wireless access of IEEE 802.11a wireless transmission protocol and Wi-Fi wireless access technology RJ45 network interface netting twine by standard, accept instruction management and controls such as data acquisition, storage and data transmission;
WAP based on IEEE 802.11a wireless transmission protocol and Wi-Fi wireless access technology realizes that by IEEE 802.11a wireless transmission protocol and Wi-Fi wireless access high-speed radio is connected with transmission control unit (TCU), WAP is connected by the Wi-Fi wireless access technology with wireless bridge again, wireless bridge realizes that by short-wave communication tedhnology high-speed radio is connected with repeater bridge, high-speed remote wireless connections and the communication module of forming monitoring materials, the high-speed remote wireless access and the data transmission of responsible data collecting instrument monitoring materials;
Switch is set up high-speed radio by IEEE 802.11a wireless transmission protocol with Wi-Fi wireless access and repeater bridge and is connected, again by being connected with the control end computing machine with netting twine by the RJ45 network interface, the control end computing machine is by installing the remote transmission Control Software, the monitoring materials of the long-range reception data collecting instrument transmission of high-speed radio, and the instruction of control end computing machine is transmitted to data collecting instrument, finishing the data collecting instrument sampling is provided with, work such as data acquisition and data wireless transmission, thus realize the high-speed radio control of monitoring rock and soil engineering and the high-speed remote wireless transmission of data.
This device technique index and main advantage:
1) network standard IEEE 802.11a standard;
2) working frequency range WLAN wireless technology, Super G technology, 5.8G frequency range;
3) the point-to-point wireless link rate of link rate can reach 54Mbps, is up to 108Mbps;
4) the flexible networking support is point-to-point, the point-to-multipoint mode of operation, and networking flexibility, extendability is strong;
5) network function Spanning-Tree Protocol, dhcp client;
6) the transmission range point-to-point transmission reaches 30km, and point-to-multipoint reaches 5km;
7) security mechanism carrier class wireless bridge, the world the highest radio data encryption standard A ES/TKIP;
8) base station depends on independent networking, need not the base station, more need not GPRS, cdma base station support;
9) working environment-40 ℃～+ 65 ℃;
10) working power POE, 48V DC, 60W;
11) output power
6～18Mbps：20dBm；
24～36Mbps：19dBm；
48～54Mbps：18dBm；
12) receiving sensitivity
6Mbps：-88dBm；
12Mbps：-86dBm；
24Mbps：-81dBm；
36Mbps：-76dBm；
48Mbps：-72dBm；
54Mbps：-68dBm；
13) antijamming capability
Built-in lightning protection circuit reaches the shock-resistant superpotential standard of national III class, can bear transient voltage 4000V;
14) dustproof and waterproof
The world the highest dustproof and waterproof standard I P68, can be in rugged surroundings such as various humidities, sand and dust operate as normal.
Two, geotechnical engineering field monitoring high-speed remote radio transmitting method (abbreviation method)
This method comprises the following steps:
1. the sensor that data collecting instrument is connected each monitoring point;
2. the Monitoring Data by data collecting instrument collection, demonstration and each measuring point of storage;
3. connect transmission control unit (TCU) and data collecting instrument;
4. WAP, wireless bridge and the supporting power-supply controller of electric thereof possess the wireless network access technology are installed, and whether are set up 1 or many repeater bridges and power-supply controller of electric according to transmission range and sighting condition decision; Perhaps install and possess wireless network access technology and bifunctional round-the-clock wireless bridge/access point of wireless transmission and supporting power-supply controller of electric thereof; Whether decision sets up 1 or many repeater bridges and power-supply controller of electric according to transmission range and sighting condition equally;
5. the remote transmission Control Software is installed in the control end computing machine, connects control end computing machine and switch;
6. set up wireless connections by transmission control unit (TCU) and WAP, the WAP wireless and repeater bridge wireless connections with round-the-clock outdoor wireless bridge again, perhaps transmission control unit (TCU) directly and simultaneously possesses bifunctional round-the-clock wireless bridge/access point of wireless network access technology and wireless transmission and repeater bridge wireless connections; Repeater bridge is set up wireless network with switch and is connected, and connects to the high-speed radio the transmission control unit (TCU) thereby finish from switch, wireless bridge, and realization control end computing machine is communicated by letter with the microwave wireless between the data collecting instrument;
7. by control end computing machine and supporting remote transmission Control Software, make the monitoring materials of control end computer receiving data Acquisition Instrument remote high-speed wireless transmission, and the instruction of control end computing machine is transmitted to data collecting instrument, finish work such as data collecting instrument sampling setting, data acquisition and data wireless transmission, thereby realize the high-speed radio control and the data transmission of monitoring rock and soil engineering.
Remote transmission Control Software Package includes network on-line module, data collecting instrument are provided with control module and remote data transport module.
The utlity model has following advantage and good effect:
1, the defeated distance of superelevation transfer rate and super teletransmission
IEEE 802.11a wireless transmission protocol, the high-speed radio of Super G technology inserts, and up to the transmission bandwidth of 54Mbp or 108Mbps, transmitting range can reach 30 kilometers farthest.The defeated distance of superelevation transfer rate and super teletransmission be GPRS and cdma wireless transmission can not compare, and GPRS and CDMA technology bandwidth deficiency, base station dependence have been overcome fully greatly, especially segment signal off the beaten track far away is faint in the distance base station, shortcoming such as percent of call completed and transfer rate are low.
2, networking flexibility, extendability is strong
Adopt point-to-point, the access way of point-to-multipoint, networking flexibility, extendability are strong, quick for installation and easy to maintenance, need not the base station and support arbitrarily networking at any time, the part detachable recycling reduces cost.
3, adaptive faculty is strong
Adopt military project level wireless bridge, the suitable environment temperature can reach-40 ℃～+ 65 ℃, and high shockproof, dustproof and waterproof grade is particularly useful for long-time remote high-speed real-time radio remote measurement under the rugged surroundings.
4, data security degree height
Data security: the support data is encrypted and is reached international highest standard AES/TKIP, has good encryption function, guarantees data transmission safety.
5, solve a monitoring rock and soil engineering remote data real time high-speed wireless transmission difficult problem, realized the real time high-speed remote measurement of Geotechnical Engineering structures distortion under the rugged surroundings.
Description of drawings
Fig. 1 is this apparatus structure block scheme;
Fig. 2 .1 is the transmission control unit (TCU) block diagram;
Fig. 2 .2 is transmission control unit (TCU) front panel figure;
Fig. 2 .3 is transmission control unit (TCU) rear panel figure;
Fig. 3 is the workflow diagram of remote transmission Control Software.
Wherein:
10-data acquisition and transmission control module,
The 11-data collecting instrument;
The 12-transmission control unit (TCU),
12.1-RJ45 network interface, the 12.2-power interface, the 12.3-power supply adaptor,
12.4-wireless network module, the 12.5-antenna, 12.6-internal integrated circuit plate,
12.7-status indicator lamp, the 12.8-power light;
20-two-forty long distance wireless transport module,
The 21-WAP,
The 22-wireless bridge,
The 23-repeater bridge;
The 30-data transmission receives control module,
The 31-switch,
32-control end computing machine,
33-remote transmission Control Software,
A-network on-line module,
The B-data collecting instrument is provided with control module,
C-remote data transport module.
English to Chinese:
GPRS: the abbreviation of general packet radio service technology (General Packet Radio Service) is a kind of data transmission technology based on global cell phone system.It provides the data transfer of middling speed by utilizing untapped TDMA channel in the global cell phone network, and theoretical transmission rate is 56kbps to 114kbps.
CDMA: being the english abbreviation (Code Division Multiple Access) of CDMA, is a kind of brand-new and ripe wireless communication technology that grows up on branch's one spread spectrum technic of digital technology.Its know-why is based on spread spectrum, has certain signal bandwidth information data with what need transmitted, modulates much larger than the high speed pseudo-random code of signal bandwidth with a bandwidth, and the bandwidth of former data-signal is expanded, again through carrier modulation and send.Receiving end uses identical pseudo-random code, makes relevant treatment with the bandwidth signal that receives, and the narrow band signal that broadband signal is changed into the prime information data is despreading, to realize information communication.Its transfer rate is a little more than GPRS.
WLAN: the english abbreviation of WLAN (Wireless Local Area Networks), utilize radio-frequency technique, replace the old-fashioned LAN that copper twisted pairs constituted, make WLAN can utilize simple access architecture to allow the user see through it, reach the function that wireless network connects, at a high speed, the data service of burst provides the service of data wireless transmission quite easily.
Embodiment
Below in conjunction with accompanying drawing and exemplifying embodiment the utility model is further specified:
One, device
1, overall
As Fig. 1, the data acquisition and transmission control module 10, two-forty long distance wireless transport module 20 and the data transmission that connect successively before and after this device comprises receive control module 30;
Described data acquisition and transmission control part 10 are made up of preceding latter linked data collecting instrument 11 and transmission control unit (TCU) 12;
Described two-forty long distance wireless transport module 20 is made up of WAP 21, wireless bridge 22 and the repeater bridge 23 of front and back wireless communications; Round-the-clock wireless bridge/the access point of the integration of wireless network access technique of wireless communications and wireless network transmissions function and repeater bridge 23 are formed before and after also can adopting;
Described data transmission receives control module 30 and is made up of preceding latter linked switch 31, control end computing machine 32 and remote transmission Control Software 33.
2, each functional part
1) data collecting instrument 11
2) transmission control unit (TCU) 12
As Fig. 2 .1, transmission control unit (TCU) 12 is a kind of wireless connections and communication devices based on 802.11a wireless network standards and Wi-Fi radio network technique, comprises RJ45 network interface 12.1, power interface 12.2, power supply adaptor 12.3, wireless network module 12.4, antenna 12.5 and internal integrated circuit plate 12.6;
Power supply adaptor 12.3 is connected with power interface 12.2 front and back, and power interface 12.2 is connected with RJ45 network interface 12.1, wireless network module 12.4 and internal integrated circuit plate 12.6 respectively;
RJ45 network interface 12.1, internal integrated circuit plate 12.6, wireless network module 12.4 and antenna 12.5 front and back are connected successively.
Power supply adaptor 12.3 is converted to voltage stabilizing direct current 5V with civil power 220V, is respectively RJ45 network interface 12.1, wireless network module 12.4 and 12.6 power supplies of internal integrated circuit plate by power interface 12.2;
Transmission control unit (TCU) 12 is connected data collecting instrument 11 by RJ45 network interface 12.1 with ICP/IP protocol, obtain Monitoring Data; And on the basis of internal integrated circuit plate 12.6, utilize wireless network module 12.4 and antenna 12.5 and WAP 21 wireless connections, high-speed remote wireless transmission Monitoring Data to data transmission receives control module 30.
As Fig. 2 .2, the front panel of transmission control unit (TCU) 12 comprises status indicator lamp (green light is a presence, and red light is an off-line state) 12.7 of network connection and the external antenna 12.5 of wireless network module.
As Fig. 2 .3, the rear panel of transmission control unit (TCU) 12 comprises RJ45 network interface 12.1, power light (green light is that presence, red light are off-line state) 12.8 and power interface 12.2.
3) WAP 21
4) wireless bridge 22
5) repeater bridge 23
6) wireless bridge/access point
Wireless bridge/access point is a kind of commonly used based on IEEE 802.11a wireless transmission protocol and short-wave communication tedhnology, adopt Super G technology, 5.8G frequency range possesses the Orinda outdoor wireless access of wireless access and high-speed radio transmission simultaneously and transmits bifunctional device.
7) switch 31
8) the control end computing machine 32
Control end computing machine 32 is a kind of technical grade computing machine (PC) that possesses the RJ45 network interface or pocket computer (notebook computer) commonly used.
9) the remote transmission Control Software 33
Remote transmission Control Software 33 is to be worked out by C Plus Plus, in order to be installed in the control end computing machine 32, finish the data that reception, processing switch 31 transmission come, and 32 pairs of data Acquisition Instruments 11 of distribution control end computing machine instruction software such as setting, data acquisition and storage of sampling; Comprise that mainly network on-line modules A, data collecting instrument are provided with control module B and remote data transport module C.
As Fig. 6, the workflow of remote transmission Control Software 33 is:
1, network on-line modules A
The network on-line modules A is finished control end computing machine 32 to the online request that data collecting instrument 11 passes through between the two-forty remote-wireless hop 20, can carry out data collecting instrument after successful connection control and data transmission work are set.If online unsuccessful, then reinitialize network, send online request once more, until successful connection.
Its workflow is:
Program begins a;
1. system initialization b;
2. netinit c;
3. online request d whether is then to enter data collecting instrument control module B is set; Jump to 2. netinit c of step otherwise change.
2, data collecting instrument is provided with control module B
It is after the network on-line modules A is finished control end computing machine 32 and the high speed of data collecting instrument 11 is connected that data collecting instrument is provided with control module B, carry out the setting and the Control work of data collecting instrument 11, comprise 11 dates of data collecting instrument, time set, sampling interval, data collecting instruments such as instant sampling are provided with steering order; Carry out data collecting instrument economize on electricity dormancy, fault outage and power up instruction of restarting.
Its workflow is:
1. data collecting instrument 11 initialization e;
2. data collecting instrument 11 is managed f;
3. data collecting instrument 11 is provided with g, and date, time are provided with h, and sampling is provided with i, power management j, and economize on electricity dormancy k and fault are restarted l.
3, remote data transport module C
Remote data transport module C can be after data collecting instrument be provided with control module B and executes data collecting instrument setting and power management, also can be directly after the network on-line modules A be finished control end computing machine 32 and the high speed of data collecting instrument 11 is connected, carry out the high-speed remote wireless transmission task of data collecting instrument Monitoring Data, and to the transmission data store and edit, for the monitoring post analysis provides data.
Its workflow is:
1. remote data transmits m;
2. remote data obtains n;
3. data storage is put o in order;
EOP (end of program) p.
Claims (3)
1. geotechnical engineering field monitoring high-speed remote wireless transmission device is characterized in that:
Data acquisition that connects successively before and after this device comprises and transmission control module (10), two-forty long distance wireless transport module (20) and data transmission receive control module (30);
Described data acquisition and transmission control module (10) are made up of preceding latter linked data collecting instrument (11) and transmission control unit (TCU) (12), mainly finish collection, storage and the transmission wait task of Monitoring Data;
Described two-forty long distance wireless transport module (20) is made up of WAP (21), wireless bridge (22) and the repeater bridge (23) of front and back wireless communications, finishes the remote high-speed wireless transmission of high-speed radio connection and monitoring materials;
Described data transmission receives control module (30) by preceding latter linked switch (31), control end computing machine (32) be installed on the interior remote transmission Control Software (33) of control end computing machine (32) and form, mainly finish reception, the processing of field monitoring data, and the remote high-speed transmission of passing through steering order realizes the two-forty remote wireless control of on-site data gathering instrument (11), realization remote high-speed wireless telemetering.
2. by the described a kind of geotechnical engineering field monitoring high-speed remote wireless transmission device of claim 1, it is characterized in that:
Transmission control unit (TCU) (12) is a kind of wireless connections and communication device based on 802.11a wireless network standards and Wi-Fi radio network technique;
Power supply adaptor (12.3) is connected with power interface (12.2) front and back, and power interface (12.2) is connected with RJ45 network interface (12.1), wireless network module (12.4) and internal integrated circuit plate (12.6) respectively, and power supply is provided;
RJ45 network interface 12.1, internal integrated circuit plate 12.6, wireless network module 12.4 and antenna 12.5 front and back are connected successively; Be connected data collecting instrument 11 with ICP/IP protocol by RJ45 network interface 12.1, obtain Monitoring Data; With WAP 21 wireless connections, high-speed remote wireless transmission Monitoring Data.
3. by the described a kind of geotechnical engineering field monitoring high-speed remote wireless transmission device of claim 1, it is characterized in that:
Remote transmission Control Software (33) is to be worked out by C Plus Plus, in order to be installed in the control end computing machine (32), finish the data that the transmission of reception, processing switch (31) comes, and distribution control end computing machine (32) is to data Acquisition Instrument (11) instruction software such as setting, data acquisition and storage of sampling; Comprise that mainly network on-line module (A), data collecting instrument are provided with control module (B) and remote data transport module (C).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871797A (en) * | 2010-06-12 | 2010-10-27 | 河海大学 | Portable wireless mobile geotechnical engineering parameter test platform based on Bluetooth |
| CN102176635A (en) * | 2011-01-30 | 2011-09-07 | 基康仪器(北京)有限公司 | Automatic acquisition device for safety monitoring data as well as power-supply method and device thereof |
| CN101599212B (en) * | 2009-07-14 | 2011-10-26 | 中国科学院武汉岩土力学研究所 | Geotechnical engineering field monitoring high-speed remote wireless transmission device and method thereof |
| CN102270380A (en) * | 2010-06-01 | 2011-12-07 | 青建集团股份公司 | Wireless monitoring system for large span structure |
| CN102521955A (en) * | 2011-12-20 | 2012-06-27 | 上海西派埃自动化技术工程有限公司 | Method for detecting preheating temperature during welding process |
| CN104700592A (en) * | 2013-12-06 | 2015-06-10 | 上海诺司纬光电仪器有限公司 | Swinger control system |
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2009
- 2009-08-14 CN CN200920227466XU patent/CN201438332U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599212B (en) * | 2009-07-14 | 2011-10-26 | 中国科学院武汉岩土力学研究所 | Geotechnical engineering field monitoring high-speed remote wireless transmission device and method thereof |
| CN102270380A (en) * | 2010-06-01 | 2011-12-07 | 青建集团股份公司 | Wireless monitoring system for large span structure |
| CN101871797A (en) * | 2010-06-12 | 2010-10-27 | 河海大学 | Portable wireless mobile geotechnical engineering parameter test platform based on Bluetooth |
| CN102176635A (en) * | 2011-01-30 | 2011-09-07 | 基康仪器(北京)有限公司 | Automatic acquisition device for safety monitoring data as well as power-supply method and device thereof |
| CN102176635B (en) * | 2011-01-30 | 2013-05-08 | 基康仪器(北京)有限公司 | Automatic acquisition device for safety monitoring data as well as power-supply method and device thereof |
| CN102521955A (en) * | 2011-12-20 | 2012-06-27 | 上海西派埃自动化技术工程有限公司 | Method for detecting preheating temperature during welding process |
| CN104700592A (en) * | 2013-12-06 | 2015-06-10 | 上海诺司纬光电仪器有限公司 | Swinger control system |
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