CN209446001U - A kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave - Google Patents
A kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave Download PDFInfo
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- CN209446001U CN209446001U CN201920107659.5U CN201920107659U CN209446001U CN 209446001 U CN209446001 U CN 209446001U CN 201920107659 U CN201920107659 U CN 201920107659U CN 209446001 U CN209446001 U CN 209446001U
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- thickness measuring
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Abstract
The utility model discloses a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave, its composition includes: tested hull surface (1), measuring thickness device (2), gateway node (3), GPRS (4), Internet (5), thickness measuring center (6).Measuring thickness device (2) is mounted on tested hull surface (1), measuring thickness device (2) carries out thickness measuring to by hull surface (1), and thickness measuring result is sent to gateway node (3), send thickness measuring information in real time by GPRS (4) and Internet (5) data base handling system of thickness measuring center (6), wherein: the composition of measuring thickness device (2) includes electromagnet ultrasonic changer (7), ultrasound emission circuit (8), signal conditioning circuit (9), ZigBee chip (10), power supply (11).The utility model has the beneficial effects that using electromagnet ultrasonic changer have many advantages, such as it is non-contact, without couplant, facilitate generate horizontal cutting wave.
Description
Technical field
The utility model belongs to electromagnetic nondestructive testing field, super more particularly, to the electromagnetism of Ship body thickness measure
Guided Waves detection system.
Background technique
To guarantee navigation safety, marine accident is reduced and avoided.The classification societies are longer to the age of a ship in recent years
Various ships shell thickness measuring work attach great importance to.Thickness measuring personnel evidence obtaining is not required nothing more than to be on duty, and detects regularized operation, and
The record of thickness measuring data, processing and report are also standardized increasingly.
One age of a ship 15 years or more ten thousand tons of cargo ship thickness measuring is typically up to over thousands of point.The age of a ship is longer, the more big then thickness measuring point of tonnage
Number is more, and some is done up to number.Thickness measuring personnel should and to heavy detection workload, again face huge measurement data
Calculating, the work the most cumbersome such as arrange and fill in a form.Only the traditional treatment method of written notes written calculation manually is then spent largely
Time and manpower seriously affect the progress of thickness measuring work.Therefore, thickness measuring data processing work is to be related to the efficiency of thickness measuring engineering
With the major issue of overall image.To solve this realistic problem, the short cycle thickness measuring needs of ship are adapted to, are fundamentally overcome
The unavoidable data mistakes and omissions of artificial treatment institute, slow-paced disadvantage.
Utility model content
For above situation, the utility model proposes large ship hull thickness measuring system use electromagnetic ultrasonic guide wave, then
In addition ZigBee wireless sensor network is used, defect existing for above-mentioned detection is overcome.
The technical solution adopted in the utility model:
A kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave, its composition includes: tested hull surface
1, measuring thickness device 2, gateway node 3, GPRS4, Internet5, thickness measuring center 6.Measuring thickness device 2 is mounted on tested hull surface 1
On, 2 pairs of measuring thickness device carries out thickness measuring by hull surface 1, and thickness measuring result is sent to gateway node 3, by GPRS4 with
Thickness measuring information is sent to the data base handling system at thickness measuring center 6 by Internet5 in real time.
The composition of the measuring thickness device 2 includes electromagnet ultrasonic changer 7, ultrasound emission circuit 8, signal conditioning circuit 9,
ZigBee chip 10, power supply 11.
The composition of electromagnet ultrasonic changer 7 includes: tested hull surface 1, flatwise coil, permanent magnet, match circuit.
The composition of ultrasound emission circuit 8 includes: output filter tuning circuit, pumping signal generation circuit, drive control
Circuit.
The utility model has the beneficial effects that
Using electromagnet ultrasonic changer have many advantages, such as it is non-contact, without couplant, facilitate generate horizontal cutting wave；Using
ZigBee wireless communication saves the trouble of wiring, easily scalable maintenance；The damage saved cost, avoided wireline equipment
Bad probability saves human cost.
Detailed description of the invention
Fig. 1 is system composition schematic diagram.
Fig. 2 is measuring thickness device composition figure.
Fig. 3 is measuring thickness device structure chart.
Fig. 4 is ultrasound emission circuit composition figure.
In figure: 1 is tested hull surface, and 2 be measuring thickness device, and 3 be gateway node, and 4 be GPRS, and 5 be Internet, and 6 are
Inspection center, 7 be electromagnet ultrasonic changer, and 8 be ultrasound emission circuit, and 9 be signal conditioning circuit, and 10 be ZigBee chip, 11
For power supply.
Specific embodiment
With reference to the accompanying drawings and detailed description, the utility model is described further.
1. the overall condition of system
(1) a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave, its composition includes: tested ship surface
Face 1, measuring thickness device 2, gateway node 3, GPRS4, Internet5, thickness measuring center 6.Measuring thickness device 2 is mounted on tested hull surface
On 1,2 pairs of measuring thickness device carry out thickness measuring by hull surface 1, and are emitted by the wireless sensor network of measuring thickness device 2 to gateway section
Point 3, and pass through GPRS4 and Internet5 for thickness measuring information real time emission to the data base handling system at thickness measuring center 6, such as Fig. 1
It is shown.
(2) composition of measuring thickness device 2 includes electromagnet ultrasonic changer 7, ultrasound emission circuit 8, signal conditioning circuit 9,
ZigBee chip 10, power supply 11, as shown in Figure 2.
(3) composition of electromagnet ultrasonic changer 7 includes: tested hull surface 1, flatwise coil, permanent magnet, match circuit, such as
Shown in Fig. 3.
(4) composition of ultrasound emission circuit 8 includes: output filter tuning circuit, pumping signal generation circuit, drive control electricity
Road, as shown in Figure 4.
2. electromagnetic ultrasonic guide wave thickness measuring
Electromagnetic ultrasonic thickness measuring method uses straight acoustic beam pulse reflection method, and when quickly being scanned and high resolution detection, or
When person detects thin material, technology can also be received using oblique acoustic beam one hair one.
During propagation, encountering two media interface can occur to reflect and transmit phenomenon ultrasonic wave.Vertical incidence
Wave can be reflected and be transmitted during workpiece upper and lower surface roundtrip, in the interface up and down of workpiece and air.It is assumed that work
The acoustic impedance of part (metal material) and air is respectively Z1And Z2, the case where for ultrasonic wave vertical incidence, available reflection system
Number R and projection coefficient T difference is as follows:
Due to the acoustic impedance Z in air2Acoustic impedance Z far smaller than in workpiece1, so, R is similar to 1, and T is similar to 0,
Ultrasonic wave is totally reflected substantially at interface, can at the upper and lower surface of workpiece multiple reflections back and forth.Then measured workpiece
Thickness can be calculated with following formula:
Wherein, d is measured workpiece thickness, TnFor the time difference between two echo-signal wave crests, as ultrasonic wave is in quilt
It surveys the workpiece upper and lower surface round-trip propagation time, C is the velocity of sound of the electromagnetic acoustic in measured body.Due at different temperatures, surpassing
Spread speed of the sound wave in workpiece is different, so, it also needs to carry out temperature-compensating to the spread speed of ultrasonic wave sometimes
Amendment.
Permanent magnet can provide the constant bias magnetic field of up to 1T.Match circuit improves the transfer efficiency of energy converter.Quilt
Surveying workpiece is ferrimagnet or conductor, and ultrasound emission circuit includes power amplifier, pulse-generating circuit and frequency regulator.
Power amplifier is that pulse-generating circuit charges, and frequency regulator adjusts the pulsewidth of the burst pulse generated and the frequency of sine wave
Rate, the circuit core device are programmable logic device (FPGA), and the waveform of optional frequency, electricity can be adjusted by online programming
After magnetic ultrasonic transducer receives ultrasound echo signal, filtered into PC by digital signal by amplification, filtering, data sampling
Wave carries out the evaluation operation of thickness.Amplifying filtered waveform can also be observed by oscillograph.Measuring thickness device structure is such as
Shown in Fig. 3.
3.ZigBee technology
ZigBee technology is a kind of short distance, low complex degree, low-power consumption, low rate, the bidirectional wireless communication skill of low cost
Art.ZigBee is a kind of wireless connection, can be worked in 2.4GHz (Global prevalence), 868MHz (Europe is popular) and 915MHz (beauty
State is popular) in 3 frequency ranges, it is respectively provided with the transmission rate of highest 250kbit/s, 20kbit/s and 40kbit/s, its transmission
Distance can continue growing in the range of 10-75m.
ZigBee module is a kind of Internet of Things wireless data terminal, provides wireless data using ZigBee-network for user and passes
Transmission function.The product uses high performance technical grade ZigBee scheme, provides SMT and DIP interface, can be directly connected to TTL interface
Equipment realizes data transparent transmission function；Low power dissipation design, lowest power consumption are less than 1mA；6 road I/O are provided, it can be achieved that digital quantity
Input and output, pulse output；Wherein there are 3 road I/O to can also be achieved the functions such as analog acquisition, step-by-step counting.
Using design: using High performance industrial grade ZigBee chip；Low power dissipation design supports multistage suspend mode and wakes up mould
Formula reduces power consumption to greatest extent；Power input (2.0~3.6V of DC).Reliable and stable: the design of WDT house dog guarantees that system is steady
It is fixed；TTL serial line interface, SPI interface are provided；Antennal interface lightning protection.
Standard is easy-to-use: the application demand using 2.0 SMA and DIP interface, particularly suitable for different user；TL is provided to connect
Mouth can directly connect the TTL serial equipment of identical voltage；Intelligent data module, data transmission state can be entered by powering on；It uses
It is convenient, flexibly, multiple-working mode selection；Convenient system configuration and maintenance interface；Support serial ports software upgrading and long-range dimension
Shield.
It is powerful: to support ZigBee wireless short-distance data-transformation facility；Have transistroute and terminal function；
Support point-to-point, point-to-multipoint, equity and Mesh network；
Network capacity is big: 65535 nodes；Node type is flexible: central node, routing node, terminal node can be any
Setting；Sending mode is flexible: broadcast transmission or destination address sending mode are optional；Communication distance is big；6 road I/O are provided, it can be achieved that
6 railway digital amount input and output；Compatible 6 tunnel pulses output, 3 road analog inputs, 3 tunnel step-by-step counting functions.
ZigBee is a kind of wireless connection, can work in 2.4GHz (Global prevalence), 868MHz (Europe popular) and
In 3 frequency ranges of 915MHz (U.S. is popular), it is respectively provided with the transmission rate of highest 250kbit/s, 20kbit/s and 40kbit/s,
Its transmission range can continue growing in the range of 10-75m.
As a kind of wireless communication technique, ZigBee has a characteristic that (1) low-power consumption: due to the transmission speed of ZigBee
Rate is low, and transmission power is only 1mW, and uses suspend mode, low in energy consumption, therefore the very power saving of ZigBee equipment.It is estimated that
ZigBee equipment only leans on No. 5 batteries of two sections that can maintain up to 6 months to 2 years or so using the time, this is other wireless
Equipment is too far behind to catch up.(2) at low cost: at 6 dollars or so, estimation will soon drop to the initial cost of ZigBee module
1.5-2.5 dollar, and Zigbee protocol exempts from patent fee.Low cost is also a crucial factor for ZigBee.
(3) time delay is short: communication delay and the time delay activated from dormant state are all very short, typical to search for equipment delay 30ms, suspend mode
The time delay of activation is 15ms, and the time delay of vehicular equipment channel access is 15ms.Therefore ZigBee technology is suitable for delay requirement
Harsh wireless control (such as Industry Control occasion) application.(4) network capacity is big: the Zigbee network of a hub-and-spoke configuration is most
254 can mostly be accommodated can exist simultaneously most 100 ZigBee-networks out of equipment and a main equipment, a region,
And network composition is flexible.(5) reliable: to take collision avoidance strategy, while to need the communication service of fixed-bandwidth reserved
Dedicated time slot avoids the competition and conflict for sending data.MAC layer uses fully validated data-transmission mode, each
The data packet of transmission all has to wait for the confirmation message of recipient.If going wrong in transmission process can be retransmitted.(6)
Safety: ZigBee provides the data packet integrity checking function based on cyclic redundancy check (CRC), supports authentication and certification,
Using the Encryption Algorithm of AES-128, each application can flexibly determine its security attribute.
4.GPRS technology
GPRS (General Packet Radio Service) is the abbreviation of general packet radio service technology, it is
A kind of available mobile data services of gsm mobile telephone user, belong to the data transmission technology in Generation Mobile Telecommunication System.GPRS
Can say be GSM continuity.GPRS with it is previous continuously different in the mode of channel transmission, be to be transmitted with package (Packet) formula,
Therefore the expense that user is born is not to use its entire channel, theoretically more just with the calculating of its data transmission unit
Preferably.The transmission rate of GPRS can be promoted to 56 even 114Kbps.
GPRS can provide the up to transmission rate of 115kbps (peak 171.2kbps does not include FEC).This means that
Within a few years, by portable computer, GPRS user can rapidly surf the web as isdn user, at the same also make it is some right
The mobile multimedia application of transmission rate sensitivity is possibly realized.Turn-on time short packet switch turn-on time shorten to be less than
1GPRS is a kind of new GSM data service, it can provide wireless packet data access stock business to mobile subscriber.
The channel resource that data rate reaches as high as 164kb/8.GSM air interface can both be occupied by speech, can also be with
It is occupied by GPRS data service.Certainly under conditions of channel abundance, some channels can be defined as GPRS dedicated channel.
It realizes GPRS network, needs to introduce new network interface and communication protocol in traditional GSM network.GPRS network introduces
GSN (GPRS Surporting Node) node.Mobile station must be then GPRS mobile station or GPRS/GSM dual mode mobile station.
5.Internet access
This is a kind of most common application of GPRS to business description GPRS, accesses Internet using mobile phone+notebook.User
The distribution of the address IP and the station address for accessing Internet business with IP network connection scheme mobile phone+notebook can distribute public affairs
There are address or private address, from the publicly-owned address angle of saving, it is proposed that use private address.
Implementation are as follows: mobile phone accesses after server radius authorization, distributes private address by GGSN, the demesne
CMNet is accessed after converting by NAT in location.
Internet access way selection GGSN access Internet has transparent and nontransparent two ways.If mobile fortune
While quotient is sought as GPRS operator, Internet access service is provided directly as ISP, it is proposed that is used transparent mode, is used
Family access internet need not be authenticated, and can be substituted by mobile phone user authentication, can be accelerated user's access speed in this way, reduced
The investment of RADIUS server.Internet can also be accessed using nontransparent mode, user authentication is carried out by RADIUS.
Claims (4)
1. a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave, its composition includes: tested hull surface
(1), measuring thickness device (2), gateway node (3), GPRS (4), Internet (5), thickness measuring center (6), it is characterised in that: thickness measuring dress
It sets (2) to be mounted on tested hull surface (1), measuring thickness device (2) carries out thickness measuring to by hull surface (1), and by thickness measuring result
Gateway node (3) are sent to, send thickness measuring information in real time by GPRS (4) and Internet (5) number of thickness measuring center (6)
According to library processing system.
2. a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave according to claim 1, feature exist
In: the composition of the measuring thickness device (2) includes: electromagnet ultrasonic changer (7), ultrasound emission circuit (8), signal conditioning circuit
(9), ZigBee chip (10), power supply (11).
3. a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave according to claim 2, feature exist
In: electromagnet ultrasonic changer (7) composition includes: tested hull surface (1), flatwise coil, permanent magnet, match circuit.
4. a kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave according to claim 2, feature exist
In: ultrasound emission circuit (8) composition includes: output filter tuning circuit, pumping signal generation circuit, drive control electricity
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920107659.5U CN209446001U (en) | 2019-01-22 | 2019-01-22 | A kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920107659.5U CN209446001U (en) | 2019-01-22 | 2019-01-22 | A kind of large ship hull thickness measuring system based on electromagnetic ultrasonic guide wave |
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| CN209446001U true CN209446001U (en) | 2019-09-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115665839A (en) * | 2022-12-26 | 2023-01-31 | 北京瑞祥宏远科技有限公司 | Multichannel low-power-consumption online fixed-point thickness measuring system and method |
-
2019
- 2019-01-22 CN CN201920107659.5U patent/CN209446001U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115665839A (en) * | 2022-12-26 | 2023-01-31 | 北京瑞祥宏远科技有限公司 | Multichannel low-power-consumption online fixed-point thickness measuring system and method |
| CN115665839B (en) * | 2022-12-26 | 2023-04-25 | 北京瑞祥宏远科技有限公司 | Multi-channel low-power-consumption online fixed-point thickness measuring system and method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190927 Termination date: 20200122 |