CN107917689A - A kind of pattern depth intelligent checking system and decorative pattern ruler circuit - Google Patents
A kind of pattern depth intelligent checking system and decorative pattern ruler circuit Download PDFInfo
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- CN107917689A CN107917689A CN201711113655.XA CN201711113655A CN107917689A CN 107917689 A CN107917689 A CN 107917689A CN 201711113655 A CN201711113655 A CN 201711113655A CN 107917689 A CN107917689 A CN 107917689A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
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Abstract
The invention discloses be related to a kind of pattern depth intelligent checking system and decorative pattern ruler circuit.Pattern depth intelligent checking system, including intelligent decorative pattern ruler, wireless network and control centre, the intelligence decorative pattern ruler includes ruler frame, shrinkage-rule and decorative pattern ruler circuit, decorative pattern ruler circuit includes microprocessor microcontroller, displacement sensor, wireless communication line module, institute's displacement sensors include sinusoidal signal generation circuit, impedance bridge measuring circuit and signal conditioning circuit, mechanical displacement is converted into electricity output by the displacement sensor of the tread ruler of pattern depth intelligent checking system, it is easy to operate, can effectively it reduce non-linear, improve transducer sensitivity, offset common-mode error, measuring speed doubles, sensitivity doubles, offset common-mode error, so that measuring system has fast response time, the advantages that stability is high.
Description
Technical field
The present invention relates to tire for vehicles association area, and in particular to a kind of pattern depth intelligent checking system and flower
Line ruler circuit.
Background technology
Tire is " intermediary " between direct bearing automobile and road surface, and one of most important building block of automobile.It is straight
Connect and contacted with road surface, and automotive suspension jointly to relax running car when suffered impact, ensure that automobile has good carriage
Comfort and ride performance；Ensure that there is good adhesion on wheel and road surface, improve the traction property of automobile, braking and logical
The property crossed；The weight of automobile is subject, the important function that tire rises on automobile is increasingly valued by people.Tire
Effect of the decorative pattern to the function of bringing into normal play of tire is very big.The main function of tyre tread is exactly to increase between tyre surface and road surface
Frictional force, to prevent wheel-slip, tyre tread is used for improving tyre surface ground connection elasticity, the work of tangential force between tyre surface and road surface
Under, decorative pattern can produce larger tangential elastic deformation, so as to strengthen rubbing action.The depth of tyre tread drives tire
Sailing experience has important influence.Decorative pattern is too deep, then pattern block ground connection elastic deformation amount is big, and the rolling resistance of formation is also just big,
But it is unfavorable for tire heat dissipation, decorative pattern root easily tears, comes off because stress is punished severely.Decorative pattern is excessively shallow, influences its water storage, draining
Ability, easily produces " hydroplaning ".
In order to ensure the validity of decorative pattern effect, clear and definite method has all been formulated in countries in the world to the tread wear limit
Rule.And mould carves tire wear limit alarms mark " △ ", " TWI " English mark at some equal portions of tire shoulder circumferentially.
When pattern block convex surface, abrasion distance arrives decorative pattern channel bottom about 1.6mm (1/16 inch), the decorative pattern of mark has been smoothed,
Therefore manifest the smooth tread of narrow horizontal stripe shape, with this alerting drivers, this tire this change.Existing tread wear is sentenced
Fixed to be measured typically by pattern depth ruler, existing pattern depth ruler function is more single, can only realize
Simple measurement and display of tyre pattern depth function, and need manually record measurement data, count, and input electricity
Brain stores, and causes the heavy workload of user, easily causes the erroneous judgement to data.One kind how is designed to solve using digital terminal
The problem of data record is troublesome in pattern depth detection process, reflection information is few, becomes industry technical staff and wants
The technical problem of solution.The patent application of application number 201510289241.7 provides a kind of with tire consume monitoring function
Management system, the tire management system includes：Central monitoring system, car-mounted terminal, handheld terminal, tire marker and survey
Measure module, tire marker and measurement module installation or be embedded in tire, for marking tire identity and measuring the ginseng of tire
Number；Handheld terminal is used to communicate with the tire marker and measurement module, to read the identity of corresponding tire and measured ginseng
Number, and handheld terminal has pattern depth measurement module, for measuring the pattern depth of tire；Each car-mounted terminal installation
On an operation vehicle；Central monitoring system communicates with car-mounted terminal and handheld terminal respectively, to receive the number that the two is obtained
According to, and central monitoring system changes with time the pattern depth of each tire and is monitored and analyzes.
It is above-mentioned with tire consume monitoring function management system during practice there are the problem of be existing
Decorative pattern ruler measuring speed and precision for measuring pattern depth are not ideal, so as to influence the sound of measuring system
Answer speed.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and it is preferable to provide a kind of response speed
Pattern depth intelligent checking system and decorative pattern ruler circuit.
Technical solution is used by the present invention solves the above problems：
A kind of pattern depth intelligent checking system, it is characterised in that：Including intelligent decorative pattern ruler, wireless network and control
Center processed, the intelligence decorative pattern ruler and intelligent terminal include via wireless network connection to control centre, the intelligence decorative pattern ruler
Ruler frame, shrinkage-rule and decorative pattern ruler circuit, decorative pattern ruler circuit include microprocessor microcontroller, displacement sensor, wireless telecommunications electricity
Road module, institute's displacement sensors include sinusoidal signal generation circuit, impedance bridge measuring circuit and signal conditioning circuit.Resistance
The structure of anti-bridge measuring circuit is as described below：One end of resistance R5, one end of capacitance C5, one end of resistance R6 and capacitance C6
One end is grounded, the other end of resistance R5, one end of the other end connection inductance L1 of capacitance C5 and interface Aout, resistance R6
The other end, capacitance C6 one end of other end connection inductance L2 and the other end of interface Bout, inductance L1 and inductance L2
The other end connects the output terminal of sinusoidal signal generation circuit, and ruler frame, shrinkage-rule determine substrate and dynamic substrate respectively so that stretch
When reduced scale frames shift dynamic with respect to ruler, determine substrate and moved relative to dynamic substrate, the first capacitor plate and the second capacitor plate are each attached to dynamic
On substrate, the first capacitor plate, the second capacitor plate, dynamic substrate form capacitance movable plate electrode, if determining, substrate is first-class to be fixed at intervals
Dry the 3rd capacitor plate so that the 3rd capacitor plate determined on substrate is laid out in grating, the 3rd capacitor plate ground connection, and the 3rd
Capacitor plate forms capacitor fixed plate with substrate is determined, and the first capacitor plate and capacitor fixed plate are respectively the pole at capacitance C5 both ends
Plate, the second capacitor plate and capacitor fixed plate are respectively the pole plate at capacitance C6 both ends.Impedance bridge measuring circuit is electric by multiple three
Hold pole plate and be equidistantly spaced from into grating structure.Capacitance C5, capacitance C6, be aided with inductance, resistance forms complete bridge arm.Capacitance moves pole
(since coupling area changes between pole plate), week will be presented in capacitance parameter to plate in moving process above capacitor fixed plate
The changing rule of phase property.Two bridge arms of capacitance movable plate electrode access impedance bridge circuit form differential layout, when two capacitor plates
During by moving a measurement period from left to right, the capacitance variations of capacitance C5 are one minimum again to maximum one from being up to
A process, at this time bridge arm A go out output voltage values and also obey this changing rule；Corresponding, capacitance movable plate electrode is moved from position 1
When moving to position 2, A points potential change is u+ Δs u；And B points current potential is then u- Δ u, the impedance bridge measuring circuit under this kind of mode
By differential signal, potential difference embodies between 2 points of A, B.Output signal carries out rectification difference through signal conditioning circuit and puts
It is sent into after big by AD conversion in microprocessor microcontroller, by that can show corresponding displacement information after processing.The displacement passes
Mechanical displacement is converted into electricity output by sensor, easy to operate, can effectively reduce non-linear, raising transducer sensitivity,
Common-mode error is offset, measuring speed doubles, and sensitivity doubles, and offsets common-mode error.Impedance bridge measuring circuit uses
Unbalance bridge circuit directly export it is differential after sensor signal, measuring system has fast response time, the stability height etc. excellent
Point.
Further, preferably, the structure of signal conditioning circuit is as described below：Interface Aout is being connected to diode D1 just
Pole, the anode of diode D1 are connected to one end of one end of capacitance C7, one end of resistance R7 and resistance R9, interface Bout connections
To the cathode of diode D2, the anode of diode D2 is connected to the one of one end of capacitance C8, one end of resistance R8 and resistance R10
End, the other end of capacitance C7, the other end of resistance R7, the other end of the other end of capacitance C8 and resistance R8 are grounded, resistance R9
The other end electrode input end of amplifier, the other end of resistance R10 and one end of resistance R12 are connected with one end of resistance R11
Connect the electrode input end of amplifier, the output terminal of the other end connection amplifier of resistance R11, another termination of resistance R12
Ground, the output terminal of amplifier are connected to microprocessor microcontroller, and signal conditioning circuit takes the side amplified after first rectifying and wave-filtering
Case, is converted to direct current signal by the output of electric bridge two-arm first, and differential amplification then can be achieved using normal operation amplifier
Function, output signal are connected to microprocessor microcontroller via AD collecting units.
Further, preferably, the structure of wireless communication line module is as described below：The pin 2- pipes of chip SIM900S
Foot 8 connects pin 1, and 9-pin of pin 14 of the chip SIM900S is grounded, and the pin 15 of chip SIM900S is via capacitance
C29 is grounded, and the pin 19 of the chip SIM900S connects the pin 1 of chip M1 and one end of resistance R15, chip SIM900S
Pin 21 connect one end of resistance R16 and the other end of resistance R15, the pin 23 of chip SIM900S connects via resistance R15
The pin 3 of chip M1 is connected to, the pin 25 of chip SIM900S is connected to the pin 6 of chip M1 via resistance R17, chip M1's
Pin 1 is grounded via capacitance C30, and the pin 30 of chip SIM900S is connected to one end of resistance R18, the other end of resistance R18
Be connected to one end of resistance R19 and the base stage of triode T1, the other end ground connection of resistance R19, the emitter of triode T1 via
GPS-NET is grounded, and the collector of the triode T1 is connected to VDD via resistance R4, and the pin 34 of chip SIM900S connects
To the collector of triode T2, the emitter of triode T2 is grounded, one end of the base stage connection resistance R13 of triode T2, resistance
One end of the other end connection resistance R14 of R13, the other end ground connection of resistance R14.
Compared with prior art, the present invention haing the following advantages and effect：The tire of pattern depth intelligent checking system
Mechanical displacement is converted into electricity output by the displacement sensor of line ruler, easy to operate, can effectively reduce non-linear, raising
Transducer sensitivity, offsets common-mode error, and measuring speed doubles, and sensitivity doubles, and offsets common-mode error so that
Measuring system has the advantages that fast response time, stability are high.
Brief description of the drawings
Fig. 1 is the structure diagram of the displacement sensor of intelligence decorative pattern ruler of the embodiment of the present invention.
Fig. 2 is the principle schematic of the displacement sensor of intelligence decorative pattern ruler of the embodiment of the present invention.
Fig. 3 is the structure diagram of impedance bridge measuring circuit of the embodiment of the present invention.
Fig. 4 is the structure diagram of signal conditioning circuit of the embodiment of the present invention.
Fig. 5 is the structure diagram of wireless communication line module of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following embodiments are to this hair
Bright explanation and the invention is not limited in following embodiments.
Referring to Fig. 1-Fig. 5, the present embodiment pattern depth intelligent checking system, including intelligent decorative pattern ruler, wireless network,
Intelligent terminal and control centre, the intelligence decorative pattern ruler and intelligent terminal are described via wireless network connection to control centre
Intelligent decorative pattern ruler includes ruler frame, shrinkage-rule and intelligent decorative pattern ruler circuit, be provided with ruler frame switch, MicroUSB charge ports,
Electricity shows liquid crystal display, external GSA antennas, SIM card socket.Intelligent decorative pattern ruler circuit includes microprocessor microcontroller, displacement passes
Sensor, wireless communication line module, memory module, touch-screen display module and power management module, displacement sensor, nothing
Line communication circuit module, memory module, touch-screen display module, power management module are connected to microprocessor microcontroller, touch
License plate number, tire brand, specification, wheel position and the essential information such as fathom can be shown by touching screen display module, and can be carried out
Data base point is reset and page furbishing work.On the one hand the content that touch-screen is shown includes：License number, brand, wheel position, tire
Pattern depth information, user can observe multiple parameters at the same time, on the other hand include：Depth clearing, off-line measurement, history number
According to, transmission, Batch sending, refresh interface, convenient for users to data are classified, are checked and are sent.Pass through wireless telecommunications electricity
Surveyed data are sent to control centre by road module, and control centre builds Database Systems, and feedback result is to use after analyzing and processing
Family.Memory module is easy to implement vast capacity data (can once measure 220 tires, 880 data, and once send)
Preservation and Batch sending.Pattern depth ruler transfers data to control centre by wireless network.Control centre can be to wheel
Tire service condition carries out data processing, analyzes degree of tire abrasion, estimates the distance travelled of tire, provided for car owner useful
Replace, management information.User can be easily checked the basic document of tire, be advantageously implemented user and software management
Sharing of the personnel in data.Intelligent terminal can use the intelligent terminals such as smart mobile phone, tablet, pass through peace on intelligent terminal
Fill intelligent terminal APP to apply from that can realize data exchange with control centre, consequently facilitating realizing typing initial data, passing through meter
Calculate and carry out the functions such as tire positioning, wheel tire information inquiry.Intelligent terminal APP application first effect be to tire license number,
Take turns the initial data such as position, brand, tyre number and carry out typing, by intelligent terminal, be transmitted directly to server platform.Second
A effect is the report directly given on intelligent terminal screen after analysis, such as whether needing to change whether tire, tire need to adjust
Whether position, wheel hub have the information such as wound, the remaining usage time of the tire.Power management function：Power module ensures intelligence at the same time
Can decorative pattern ruler, liquid crystal display and the power demands of wireless telecommunications.
Institute's displacement sensors include sinusoidal signal generation circuit, impedance bridge measuring circuit and signal conditioning circuit.Resistance
The structure of anti-bridge measuring circuit is as described below：One end of resistance R5, one end of capacitance C5, one end of resistance R6 and capacitance C6
One end is grounded, the other end of resistance R5, one end of the other end connection inductance L1 of capacitance C5 and interface Aout, resistance R6's
The other end, one end of other end connection inductance L2 of capacitance C6 and the other end of interface Bout, inductance L1 and inductance L2's is another
One end connects the output terminal of sinusoidal signal generation circuit, and ruler frame, shrinkage-rule determine substrate and dynamic substrate respectively so that flexible
When ruler frames shift dynamic with respect to ruler, determine substrate and moved relative to dynamic substrate, the first capacitor plate and the second capacitor plate are each attached to dynamic base
On plate, the first capacitor plate, the second capacitor plate, dynamic substrate form capacitance movable plate electrode, determine substrate it is first-class be fixed at intervals it is some
A 3rd capacitor plate so that the 3rd capacitor plate determined on substrate is laid out in grating, the 3rd capacitor plate ground connection, the 3rd electricity
Holding pole plate and determine substrate and form capacitor fixed plate, the first capacitor plate and capacitor fixed plate are respectively the pole plate at capacitance C5 both ends,
Second capacitor plate and capacitor fixed plate are respectively the pole plate at capacitance C6 both ends.Impedance bridge measuring circuit is by multiple 3rd capacitances
Pole plate is equidistantly spaced from into grating structure.Capacitance C5, capacitance C6, be aided with inductance, resistance forms complete bridge arm.Capacitance movable plate electrode
(since coupling area changes between pole plate), the cycle will be presented in capacitance parameter in moving process above capacitor fixed plate
The changing rule of property.Capacitance movable plate electrode access impedance bridge circuit two bridge arms form differential layout, when two capacitor plates by
When moving a measurement period from left to right, the capacitance variations of capacitance C5 are one minimum again to maximum one from being up to
Process, at this time bridge arm A go out output voltage values and also obey this changing rule；Corresponding, capacitance movable plate electrode is moved from position 1
During to position 2, A points potential change is u+ Δs u；And B points current potential is then u- Δ u, impedance bridge measuring circuit under this kind of mode
By differential signal, potential difference embodies between 2 points of A, B.Export signal and carry out rectification differential amplification through signal conditioning circuit
It is sent into afterwards by AD conversion in microprocessor microcontroller, by that can show corresponding displacement information after processing.The displacement sensing
Mechanical displacement is converted into electricity output by device, easy to operate, can effectively be reduced non-linear, raising transducer sensitivity, be supported
Disappear common-mode error, and measuring speed doubles, and sensitivity doubles, and offsets common-mode error.Impedance bridge measuring circuit is not using
Null-type bridge circuit directly export it is differential after sensor signal, measuring system has fast response time, the stability height etc. excellent
Point.(improve measurement accuracy based on least square method error correction algorithms and can reach ± 0.01mm).
The structure of signal conditioning circuit is as described below：Interface Aout is connected to the cathode of diode D1, and diode D1's is negative
Pole is connected to one end of one end of capacitance C7, one end of resistance R7 and resistance R9, and interface Bout is being connected to diode D2 just
Pole, the anode of diode D2 are connected to one end of one end of capacitance C8, one end of resistance R8 and resistance R10, and capacitance C7's is another
The other end at end, the other end of resistance R7, the other end of capacitance C8 and resistance R8 is grounded, the other end and resistance of resistance R9
The electrode input end of one end connection amplifier of R11, the other end of resistance R10 are connecting amplifier just with one end of resistance R12
Pole input terminal, the output terminal of the other end connection amplifier of resistance R11, the other end ground connection of resistance R12, the output of amplifier
End is connected to microprocessor microcontroller, and signal conditioning circuit takes the scheme amplified after first rectifying and wave-filtering, first by electric bridge two-arm
Output be converted to direct current signal, then using normal operation amplifier i.e. can be achieved differential enlarging function, output signal through defeated
Go out AD collecting units progress signal acquisition, analysis and processing that signal is sent to singlechip microprocessor after preliminary filtering, obtain
To the pattern depth value of measurement, the storage unit of terminal is then stored into.
The structure of wireless communication line module is as described below：
The pin 2- pins 8 of chip SIM900S connect pin 1, and 9-pin of pin 14 of the chip SIM900S is grounded,
The pin 15 of chip SIM900S is grounded via capacitance C29, and the pin 19 of the chip SIM900S connects the pin 1 of chip M1
With one end of resistance R15, the pin 21 of chip SIM900S connects one end of resistance R16 and the other end of resistance R15, chip
The pin 23 of SIM900S is connected to the pin 3 of chip M1 via resistance R15, and the pin 25 of chip SIM900S is via resistance R17
The pin 6 of chip M1 is connected to, the pin 1 of chip M1 is grounded via capacitance C30, and the pin 30 of chip SIM900S is connected to electricity
One end of R18 is hindered, the other end of resistance R18 is connected to one end of resistance R19 and the base stage of triode T1, and resistance R19's is another
End ground connection, the emitter of triode T1 are grounded via GPS-NET, and the collector of the triode T1 is connected to via resistance R4
VDD, the pin 34 of chip SIM900S are connected to the collector of triode T2, the emitter ground connection of triode T2, triode T2
Base stage connection resistance R13 one end, one end of the other end connection resistance R14 of resistance R13, another termination of resistance R14
Ground.GPRS network is the GPRS serving GPRS support nodes (SGSN) on original GSM networks based on circuit switching (CSD) mode
With gateway support node (GGSN).SGSN and MSC is in same hierarchy level, and the storage unit for tracking single MS realizes safety
Function and access control, and are connected to base station system by frame relay.GGSN supports the intercommunication with external packet-switched networks, and
Connected via IP-based GPRS backbone networks with SGSN.GPRS terminals obtain data by interface from client, after processing
GPRS grouped datas are sent to GSM base stations.After SGSN is encapsulated, SGSN is supported grouped data by GPRS backbone networks and gateway
Contact GGSN communicates.GGSN handles grouped data accordingly, re-sends to purpose network Internet, this end
SIM900S modules in end are that SIMCom releases a novel radio module, complete above-mentioned communication process.It belongs to four frequencies
GSM/GPRS modules, completely using SMT encapsulation form, while employ powerful ARM926EJ-S chip processors.
SIM900 performances are stablized, and appearance is compact, cost-effective, can meet your a variety of demands.SIM900 uses industry standard interface,
Working frequency is GSM/GPRS 850/900/1800/1900MHz, meets GSM 2/2+ standards, encoding scheme：CS1-CS4,
The transmission of voice, SMS, data and facsimile message can be realized with low-power consumption.In addition, the size of SIM900 can be suitably used for M2M
All kinds of design requirements in, are particularly suitable for compact products design.
The present embodiment correspondingly provides a kind of pattern depth intelligent detecting method, it is characterised in that：Include following reality
Existing step：Step 1, measure acquisition pattern depth data source by intelligent decorative pattern ruler；Step 2, intelligent decorative pattern ruler are by data
The data in source are encrypted, and encrypted data then are carried out Mac computings, and then intelligence decorative pattern ruler will load the data of Mac
Packing upload is carried out, step 3, control centre are parsed received data, according to the algorithm of both sides' agreement by received number
According to Mac values are obtained, compared with the Mac values for receiving data packet, if Mac values differ, then it is assumed that be invalid data without
Process, this kind for the treatment of mechanism can guarantee data security to avoid interference of the illegal invasion person to system normal data of system
Property.
In above-mentioned steps 2, the data of data source encrypt using DES innovatory algorithms by intelligent decorative pattern ruler, so as to ensure
Data safety, the data of Mac are by CRC check to ensure that data are accurate.To ensure that data are calculated safely using standard DES in itself
Method carries out data encryption.When writing cryptographic algorithm process itself, avoid using the 8th, 16,24 ... 64 conducts have
Data bit is imitated, and ensures that DES algorithm securities reliably play a role using other 56 as valid data position, avoiding should
The mistaken ideas used, leave the very big hidden danger attacked by people, decoded by people.Data transmission：In linking layer using reliable
CRC check, ensures the transmitting of data；In transmission application layer using reliable terminal and data center's protocol mechanisms.
Ensure the reliability of data transfer from stage construction.
In above-mentioned steps 2, intelligent decorative pattern ruler has opened five-star interrupt for the intelligent decorative pattern ruler depth data source of measurement and has rung
Should, receive send depth data in time, before the data for loading Mac are carried out packing upload by intelligent decorative pattern ruler, first will receive
Data cached, according to the storage order of user, be transmitted successively, thereby ensure that the integrality of data and continuous
Property, even if the control centre of upper end cannot receive lower end data due to various reasons, the memory carried also can be by data source
The data sent carry out permanent storage, and memory capacity avoids the loss of data source data up to more than 4Kbytes.
In above-mentioned steps 2, after intelligent decorative pattern ruler has sent data packet to control centre, control centre can be waited to beam back should
Information is answered, if do not responded within the time of agreement, then it is assumed that upper end does not receive data packet, then can be by recently
The data packet sent is resend once, untill receiving the response of control centre.In this way, it is ensured that
The validity of data source transmission.
In above-mentioned steps 2, control centre carries out downlink control to each measuring terminals.(if user is illegally using measurement
Terminal, remote control measuring terminals, can not complete measurement work).Control centre can obtain after receiving remote terminal upload information
Downlink control command is transmitted terminal by distant terminal ID number and terminal network address, center as needed.Terminal receives
Parsed after order, perform related command operation to be sent to this station command through analysis, reach downlink control purpose.
Ppp protocol stack independent research.Our microprocessor (microcontroller) is matched completely.Ppp protocol is provided serial
The method of point-to-point link transmitting data report, supports asynchronous 8 data synchronized links, is at present gprs service link standards.
It is as follows that the ppp link of entirely autonomous research and development establishes negotiation flow：After dial-up success connection, GGSN can return to one first please
Seek setting data frame.Gateway sends a LCP acknowledgement frame, and retransmits LCP requests and set frame.When the LCP for receiving GGSN is set
After acknowledgement frame, PAP authentications are sent to GGSN.Then, PAP verification username and password processes are carried out, in gprs user
Name and password are all sky, if it is successful, GGSN can return to IPCP messages distribution dynamic IP addressing.At this time, just complete and GGSN
Negotiations process.After link is established, PPP will call procotol TCP/UDP protocol communications on the basis of original agreement.TCP
It is the agreement based on connection, before formal transceiving data, it is necessary to and other side establishes reliable connection.One TCP connection has to
It can just be set up by " talking with " three times, its process is extremely complex.This terminal embedded type software cuts TCPIP, develops TCP/
The simple cores of IP, using udp protocol, UDP provides Connectionless transport service, just because of process of the udp protocol without connection, so
Its communication efficiency is high, can be ensured in terms of reliability by the acknowledgement mechanism of user.
Control centre is (i.e.：Cloud server) processing data capability is powerful, establish tire electronics archives, special algorithm calculates
Tire wear, consequently facilitating subsequently formulating tire operation solution, realizes tire Life cycle management and control.The abrasion of tire
The type of brand, tire depending on tire, pattern depth, DWCC dead weight cargo capacity, the vehicle of car in itself are the road that will be travelled
Condition, weather conditions and present tire degree of wear etc..The type x pattern depths x of the brand x tires of abrasion=tire of tire
The road conditions x weather conditions x present tire degree of wear x-coefficients of DWCC dead weight cargo capacity x travelings.
The system that the system is formed Department of Communications, fleet management's layer, tire work or car owner using long-range control centre as core, builds
Vertical wheel tire electronic record, it is corresponding to formulate unique tire operation solution, realize tire Life cycle management and control.Pass through intelligence
The initial data and real-time detector data of energy terminal typing tire, user can check detailed tire information.The system can
Solve the problem of fleet management：1. provide data supporting for policymaker's re-type, there is provided replace standard, reduce risk, save
Cost；2. establishing tire asset management center, each tires are familiar with as being familiar with relatives；3. pro-active intervention inordinate wear,
The risk of loss that wound and rim belt come；4. people, car, the whole binding of tire, until tire end of life；5. Intelligent hardware is true
Detection accurate data, reliable is protected, is saved artificial；6. value-added service makes tire farther compared to running originally under line.
Above content described in this specification is only illustration made for the present invention.Technology belonging to the present invention
The technical staff in field can do described specific embodiment various modifications or additions or in a similar way
Substitute, content without departing from description of the invention or surmount scope defined in the claims, this should all be belonged to
The protection domain of invention.
Claims (6)
- A kind of 1. pattern depth intelligent checking system, it is characterised in that：Including intelligent decorative pattern ruler, wireless network and control Center, the intelligence decorative pattern ruler and intelligent terminal include ruler via wireless network connection to control centre, the intelligence decorative pattern ruler Frame, shrinkage-rule and decorative pattern ruler circuit, decorative pattern ruler circuit include microprocessor microcontroller, displacement sensor, wireless communication line Module, institute's displacement sensors include sinusoidal signal generation circuit, impedance bridge measuring circuit and signal conditioning circuit, impedance bridge The structure of measuring circuit is as described below：One end of resistance R5, one end of capacitance C5, one end of one end of resistance R6 and capacitance C6 are equal Ground connection, the other end of resistance R5, one end of the other end connection inductance L1 of capacitance C5 and interface Aout, resistance R6's is another End, the other end of capacitance C6 connect one end and the other end of interface Bout, inductance L1 and the other end of inductance L2 of inductance L2 The output terminal of sinusoidal signal generation circuit is connected, ruler frame, shrinkage-rule determine substrate and dynamic substrate respectively so that shrinkage-rule is opposite When ruler frames shift dynamic, to determine substrate and moved relative to dynamic substrate, the first capacitor plate and the second capacitor plate are each attached on dynamic substrate, the One capacitor plate, the second capacitor plate, dynamic substrate form capacitance movable plate electrode, and determine substrate, first-class to be fixed at intervals several the 3rd electric Hold pole plate so that determine the 3rd capacitor plate on substrate and be laid out in grating, the 3rd capacitor plate ground connection, the 3rd capacitor plate with determine Substrate forms capacitor fixed plate, and the first capacitor plate and capacitor fixed plate are respectively the pole plate at capacitance C5 both ends, the second capacitance pole Plate and capacitor fixed plate are respectively the pole plate at capacitance C6 both ends.
- 2. pattern depth intelligent checking system according to claim 1, it is characterised in that：The knot of signal conditioning circuit Structure is as described below：Interface Aout is connected to the cathode of diode D1, and the anode of diode D1 is connected to one end of capacitance C7, resistance One end of R7 and one end of resistance R9, interface Bout are connected to the cathode of diode D2, and the anode of diode D2 is connected to capacitance One end of one end of C8, one end of resistance R8 and resistance R10, the other end of capacitance C7, the other end of resistance R7, capacitance C8 it is another The other end of one end and resistance R8 are grounded, and the other end of resistance R9 connects the cathode input of amplifier with one end of resistance R11 End, the other end of resistance R10 connect the electrode input end of amplifier with one end of resistance R12, and the other end connection of resistance R11 is put The output terminal of big device, the other end ground connection of resistance R12, the output terminal of amplifier are connected to microprocessor microcontroller.
- 3. pattern depth intelligent checking system according to claim 1, it is characterised in that：Wireless communication line module Structure it is as described below：The pin 2- pins 8 of chip SIM900S connect pin 1,9-pin of pin of the chip SIM900S 14 ground connection, the pin 15 of chip SIM900S are grounded via capacitance C29, and the pin 19 of the chip SIM900S connects chip M1's One end of pin 1 and resistance R15, the pin 21 of chip SIM900S connect one end of resistance R16 and the other end of resistance R15, core The pin 23 of piece SIM900S is connected to the pin 3 of chip M1 via resistance R15, and the pin 25 of chip SIM900S is via resistance R17 is connected to the pin 6 of chip M1, and the pin 1 of chip M1 is grounded via capacitance C30, and the pin 30 of chip SIM900S is connected to One end of resistance R18, the other end of resistance R18 are connected to one end of resistance R19 and the base stage of triode T1, and resistance R19's is another One end is grounded, and the emitter of triode T1 is grounded via GPS-NET, and the collector of the triode T1 is connected to via resistance R4 VDD, the pin 34 of chip SIM900S are connected to the collector of triode T2, and the emitter of triode T2 is grounded, triode T2's One end of base stage connection resistance R13, one end of the other end connection resistance R14 of resistance R13, the other end ground connection of resistance R14.
- A kind of 4. decorative pattern ruler circuit, it is characterised in that：Including microprocessor microcontroller, displacement sensor, wireless communication line mould Block, institute's displacement sensors include sinusoidal signal generation circuit, impedance bridge measuring circuit and signal conditioning circuit, and impedance bridge is surveyed The structure for measuring circuit is as described below：One end of resistance R5, one end of capacitance C5, one end of one end of resistance R6 and capacitance C6 connect Ground, the other end of resistance R5, one end of the other end connection inductance L1 of capacitance C5 and interface Aout, the other end of resistance R6, One end of other end connection inductance L2 of capacitance C6 and the other end of interface Bout, inductance L1 are connected with the other end of inductance L2 The output terminal of sinusoidal signal generation circuit, ruler frame, shrinkage-rule determine substrate and dynamic substrate respectively so that shrinkage-rule is with respect to ruler frame When mobile, determine substrate and moved relative to dynamic substrate, the first capacitor plate and the second capacitor plate are each attached on dynamic substrate, the first electricity Hold pole plate, the second capacitor plate, dynamic substrate and form capacitance movable plate electrode, determine that substrate is first-class to be fixed at intervals several the 3rd capacitance poles Plate so that determine the 3rd capacitor plate on substrate and be laid out in grating, the 3rd capacitor plate ground connection and determines substrate at the 3rd capacitor plate Form capacitor fixed plate, the first capacitor plate and capacitor fixed plate are respectively the pole plate at capacitance C5 both ends, the second capacitor plate and Capacitor fixed plate is respectively the pole plate at capacitance C6 both ends.
- 5. decorative pattern ruler circuit according to claim 4, it is characterised in that：The structure of signal conditioning circuit is as described below：Connect Mouth Aout is connected to the cathode of diode D1, and the anode of diode D1 is connected to one end of capacitance C7, one end of resistance R7 and electricity One end of R9 is hindered, interface Bout is connected to the cathode of diode D2, and the anode of diode D2 is connected to one end of capacitance C8, resistance One end of R8 and one end of resistance R10, the other end of capacitance C7, the other end of resistance R7, the other end and resistance R8 of capacitance C8 The other end be grounded, the other end of resistance R9 connects the electrode input end of amplifier with one end of resistance R11, resistance R10's The other end connects the electrode input end of amplifier, the output of the other end connection amplifier of resistance R11 with one end of resistance R12 End, the other end ground connection of resistance R12, the output terminal of amplifier are connected to microprocessor microcontroller.
- 6. decorative pattern ruler circuit according to claim 4, it is characterised in that：The following institute of structure of wireless communication line module State：The pin 2- pins 8 of chip SIM900S connect pin 1, and 9-pin of pin 14 of the chip SIM900S is grounded, chip The pin 15 of SIM900S is grounded via capacitance C29, and the pin 19 of the chip SIM900S connects the pin 1 and resistance of chip M1 One end of R15, the pin 21 of chip SIM900S connect one end of resistance R16 and the other end of resistance R15, chip SIM900S's Pin 23 is connected to the pin 3 of chip M1 via resistance R15, and the pin 25 of chip SIM900S is connected to chip via resistance R17 The pin 6 of M1, the pin 1 of chip M1 are grounded via capacitance C30, and the pin 30 of chip SIM900S is connected to the one of resistance R18 End, the other end of resistance R18 are connected to one end of resistance R19 and the base stage of triode T1, and the other end of resistance R19 is grounded, and three The emitter of pole pipe T1 is grounded via GPS-NET, and the collector of the triode T1 is connected to VDD, chip via resistance R4 The pin 34 of SIM900S is connected to the collector of triode T2, the emitter ground connection of triode T2, the base stage connection of triode T2 One end of resistance R13, one end of the other end connection resistance R14 of resistance R13, the other end ground connection of resistance R14.
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| CN107917689B (en) | 2020-09-04 |
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