CN104766376A - Novel frequency conversion identification system for ETC - Google Patents
Novel frequency conversion identification system for ETC Download PDFInfo
- Publication number
- CN104766376A CN104766376A CN201510121786.7A CN201510121786A CN104766376A CN 104766376 A CN104766376 A CN 104766376A CN 201510121786 A CN201510121786 A CN 201510121786A CN 104766376 A CN104766376 A CN 104766376A
- Authority
- CN
- China
- Prior art keywords
- pole
- resistance
- triode
- circuit
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Finance (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a novel frequency conversion identification system for ETC. The identification system is mainly composed of a signal collecting circuit (1), a linear amplification circuit (3), a signal identification circuit (4) connected with the linear amplification circuit (3), a constant current source circuit (5) connected with the signal identification circuit (4), and a tail end transmission circuit (6) connected with the constant current source circuit (5). The identification system is characterized in that a frequency conversion circuit (2) is further arranged between the signal collecting circuit (1) and the linear amplification circuit (3) and is composed of an operational amplifier T1, a triode Q2, a triode Q3, a diode D1 and the like, wherein an N electrode of the diode D1 is connected with the inverting input end of the operational amplifier T1 through a potentiometer R4 and a potentiometer R8 in sequence, a P electrode is connected with the non-inverting input end of the operational amplifier T1 through a resistor R3. The vehicle information frequency received by the system can be automatically adjusted by the frequency conversion circuit (2) adopted in the novel frequency conversion identification system for ETC, so that the demand of the identification system is met, vehicle information is identified more accurately by the identification system, and the phenomenon of miss-identification is avoided.
Description
Technical field
Invention relates to electronic applications, specifically refers to the novel recognition system of a kind of ETC frequency transformation.
Background technology
Toll on the road and bridge's mainly money transaction of current China, exists a lot of not enough: as low in vehicle pass-through rate, error probability is large, manages extremely inconvenient.In financial management, many irremediable leaks can be produced, thus cause the loss of charge fund; At vehicle pass-through management aspect, owing to lacking the necessary precautionary measures, make to rush truck and significantly rise.And ETC system adopts the equipment and technology of a series of advanced person, as TV monitor system, roadblock control system, computing machine financial management system etc., improve vehicle pass-through rate to greatest extent, owing to adopting computer management account, overcome the variety of problems that manual toll collection exists, transport by road potential can be given full play to.Improve highway, the magnitude of traffic flow of bridge and economic and social benefit.Various not Auto Fare Collection Parking System has been applied on more domestic highways at present, and achieves good effect.
But the information of vehicles frequency that receives of ETC system is different sometimes, thus causes ETC system to occur mistake to information of vehicles identification, all brings very large puzzlement to charge department and car owner.
Summary of the invention
The object of invention is to overcome current ETC system, and the information of vehicles frequency that receives of ETC system is different sometimes, thus cause ETC system to occur the defect of mistake to information of vehicles identification, a kind of novel recognition system of a kind of ETC frequency transformation that accurately can identify information of vehicles is provided.
The object of invention realizes by following technical scheme: the novel recognition system of a kind of ETC frequency transformation, primarily of signal acquisition circuit, linear amplifier circuit, the signal recognition circuit be connected with linear amplifier circuit, the constant-current source circuit be connected with signal recognition circuit, and the end transmission circuit to be connected with constant-current source circuit forms, and is also provided with frequency-conversion circuit between signal acquisition circuit and linear amplifier circuit, described frequency-conversion circuit is by operational amplifier T1, triode Q2, triode Q3, N pole is connected with the inverting input of operational amplifier T1 after potentiometer R8 through potentiometer R4 in turn, the diode D1 that P pole is then connected with the normal phase input end of operational amplifier T1 after resistance R3, N pole is connected with Acquisition Circuit, the thyristor D2 that P pole is then connected with the P pole of diode D1, one end is connected with the N pole of thyristor D2, the resistance R5 that the other end is connected with the positive pole of operational amplifier T1, N pole is connected with the N pole of thyristor D2 after resistance R6, the diode D3 that P pole is connected with the tie point of potentiometer R8 with potentiometer R4, one end is connected with the N pole of thyristor D2, the resistance R7 that the other end is then connected with the output terminal of operational amplifier T1 after resistance R9, and positive pole is connected with the emitter of triode Q2, the polar capacitor C4 that negative pole is connected with the output terminal of operational amplifier T1 forms, the emitter of described triode Q2 is connected with the inverting input of operational amplifier T1, collector is connected with the base stage of triode Q3, base stage is connected with the tie point of resistance R9 with resistance R7, the collector of triode Q3 is connected with the base stage of triode Q2, emitter is connected with the output terminal of operational amplifier T1, and the P pole of diode D1 is also connected with signal acquisition circuit.
Further, described signal acquisition circuit is by triode Q1, the polar capacitor C1 that positive pole is connected with the collector of triode Q1 after polar capacitor C3 through resistance R1 in turn, negative pole is then connected with the base stage of triode Q1, the polar capacitor C2 that positive pole is connected with the positive pole of polar capacitor C1 after resistance R2, negative pole is connected with the base stage of triode Q1 forms; Resistance R1 is connected with the N pole of thyristor D2 with the tie point of polar capacitor C3, and the emitter of triode Q1 is connected with the P pole of diode D1.
Described linear amplifier circuit is by operational amplifier T2, the polar capacitor C5 that positive pole is connected with the output terminal of operational amplifier T1, negative pole is connected with the inverting input of operational amplifier T2, the resistance R10 that one end is connected with the output terminal of operational amplifier T1, the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R11 forms; The sliding end of potentiometer R11 is connected with the negative pole of polar capacitor C5, and the normal phase input end of operational amplifier T2 is then simultaneously with the output terminal of operational amplifier T1 and signal recognition circuit is connected, its output terminal is connected with signal recognition circuit.
Described signal recognition circuit is by identification chip U1, triode Q4, positive pole is connected with the emitter of triode Q3, the polar capacitor C6 that negative pole is connected with the collector of triode Q4, one end is connected with the positive pole of polar capacitor C6, the resistance R12 that the other end is connected with IN2 pin with the IN1 pin of identification chip U1 simultaneously, P pole is connected with the emitter of triode Q4, the diode D4 that N pole is connected with the normal phase input end of operational amplifier T2, positive pole is connected with the emitter of triode Q4, the polar capacitor C7 that negative pole is connected with the GAIN pin of identification chip U1, and N pole is connected with the OUT pin of identification chip U1, the diode D5 that P pole is then connected with the BYP pin of identification chip U1 forms, the VCC pin of described identification chip U1 is connected with the positive pole of polar capacitor C6, its GND pin is connected with VS pin, VS pin then simultaneously with the N pole of diode D4 and constant-current source circuit is connected, OUT pin is connected with constant-current source circuit, the base stage of triode Q4 is connected with the output terminal of operational amplifier T2.
Described constant-current source circuit comprises resistance R13, potentiometer R14, resistance R15, resistance R16, polar capacitor C8, and triode Q5; The emitter of described triode Q5 is connected with its collector in turn after potentiometer R14, resistance R13, resistance R15 and resistance R16, its base stage is then connected with the tie point of resistance R15 and resistance R16 and end transmission circuit simultaneously, and collector is ground connection after polar capacitor C8; The tie point of resistance R15 and resistance R13 is connected with the OUT pin of identification chip U1 and external power source simultaneously, and the collector of triode Q5 is also connected with the VS pin of identification chip U1 and end transmission circuit simultaneously.
Described end transmission circuit is by process chip U2, differential amplifier T3, the polar capacitor C9 that positive pole is connected with the CO pin of process chip U2, negative pole is connected with the CN pin of process chip U2 after resistance R17, the resistance R18 be in parallel with polar capacitor C9, the polar capacitor C10 that positive pole is connected with the FX pin of process chip U2 after resistance R19 through resistance R20, negative pole is then connected with the BE pin of process chip U2 forms; The inverting input of described differential amplifier T3 is connected with the BE pin of process chip U2, normal phase input end is connected with the collector of triode Q5, and the CO pin of process chip U2 is also connected with the base stage of triode Q5, FU pin is empty pin.
Invention compared with prior art, has the following advantages and beneficial effect:
(1) frequency-conversion circuit that adopts of the present invention, it can information of vehicles frequency received by automatic adjustment system, to meet the demand of recognition system, makes recognition system more accurate to the identification of information of vehicles, avoids identifying that existing picture occurs by mistake.
(2) electronic component of the present invention is cheap, saves manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of invention.
In above accompanying drawing, Reference numeral title is respectively:
1-signal acquisition circuit, 2-frequency-conversion circuit, 3-linear amplifier circuit, 4-signal recognition circuit, 5-constant-current source circuit, 6-end transmission circuit.
Embodiment
Below in conjunction with specific embodiment, invention is described in further detail, but working of an invention mode is not limited thereto.
Embodiment
As shown in Figure 1, the novel recognition system of a kind of ETC frequency transformation of the present invention, primarily of signal acquisition circuit 1, linear amplifier circuit 3, the signal recognition circuit 4 be connected with linear amplifier circuit 3, the constant-current source circuit 5 be connected with signal recognition circuit 4, and the end transmission circuit 6 be connected with constant-current source circuit 5 forms.In order to object of the present invention can be realized, between signal acquisition circuit 1 and linear amplifier circuit 3, be also provided with frequency-conversion circuit 2.
Wherein, signal acquisition circuit 1 is for collection vehicle information, it is by triode Q1, the polar capacitor C1 that positive pole is connected with the collector of triode Q1 after polar capacitor C3 through resistance R1 in turn, negative pole is then connected with the base stage of triode Q1, the polar capacitor C2 that positive pole is connected with the positive pole of polar capacitor C1 after resistance R2, negative pole is connected with the base stage of triode Q1 forms; Resistance R1 is all connected with frequency-conversion circuit 2 with the emitter of triode Q1 with the tie point of polar capacitor C3.
Simultaneously, frequency-conversion circuit 2 is emphasis of the present invention, it is by operational amplifier T1, triode Q2, triode Q3, N pole is connected with the inverting input of operational amplifier T1 after potentiometer R8 through potentiometer R4 in turn, the diode D1 that P pole is then connected with the normal phase input end of operational amplifier T1 after resistance R3, N pole is connected with the tie point of polar capacitor C3 with resistance R1, the thyristor D2 that P pole is then connected with the P pole of diode D1, one end is connected with the N pole of thyristor D2, the resistance R5 that the other end is connected with the positive pole of operational amplifier T1, N pole is connected with the N pole of thyristor D2 after resistance R6, the diode D3 that P pole is connected with the tie point of potentiometer R8 with potentiometer R4, one end is connected with the N pole of thyristor D2, the resistance R7 that the other end is then connected with the output terminal of operational amplifier T1 after resistance R9, and positive pole is connected with the emitter of triode Q2, the polar capacitor C4 that negative pole is connected with the output terminal of operational amplifier T1 forms, the emitter of described triode Q2 is connected with the inverting input of operational amplifier T1, collector is connected with the base stage of triode Q3, base stage is connected with the tie point of resistance R9 with resistance R7, the collector of triode Q3 is connected with the base stage of triode Q2, emitter is connected with the output terminal of operational amplifier T1, and the P pole of diode D1 is also connected with the emitter of triode Q1.Frequency-conversion circuit 2 can adjust automatically to the information of vehicles that signal acquisition circuit 1 gathers, and to meet the demand of recognition system, makes recognition system more accurate to the identification of information of vehicles, avoids identifying that existing picture occurs by mistake.Triode Q2 in circuit and triode Q3 triggers connection mutually, makes the efficiency of frequency-conversion circuit 2 higher.
Linear amplifier circuit 3 is by operational amplifier T2, and polar capacitor C5, resistance R10 and potentiometer R11 form.The positive pole of polar capacitor C5 is connected with the output terminal of operational amplifier T1, negative pole is connected with the inverting input of operational amplifier T2, and one end of resistance R10 is connected with the output terminal of operational amplifier T1, the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R11.Meanwhile, the sliding end of potentiometer R11 is connected with the negative pole of polar capacitor C5, and the normal phase input end of operational amplifier T2 is then simultaneously with the output terminal of operational amplifier T1 and signal recognition circuit 4 is connected, its output terminal is connected with signal recognition circuit 4.By the process of linear amplifier circuit 3, the distortionless amplification of signal can be made, can be good at avoiding ETC system to vehicle error identification.
Signal recognition circuit 4 is by identification chip U1, triode Q4, positive pole is connected with the emitter of triode Q3, the polar capacitor C6 that negative pole is connected with the collector of triode Q4, one end is connected with the positive pole of polar capacitor C6, the resistance R12 that the other end is connected with IN2 pin with the IN1 pin of identification chip U1 simultaneously, P pole is connected with the emitter of triode Q4, the diode D4 that N pole is connected with the normal phase input end of operational amplifier T2, positive pole is connected with the emitter of triode Q4, the polar capacitor C7 that negative pole is connected with the GAIN pin of identification chip U1, and N pole is connected with the OUT pin of identification chip U1, the diode D5 that P pole is then connected with the BYP pin of identification chip U1 forms, the VCC pin of described identification chip U1 is connected with the positive pole of polar capacitor C6, its GND pin is connected with VS pin, VS pin then simultaneously with the N pole of diode D4 and constant-current source circuit 5 is connected, OUT pin is connected with constant-current source circuit 5, the base stage of triode Q4 is connected with the output terminal of operational amplifier T2.In order to better implement the present invention, this identification chip U1 elects LM386 integrated chip as, and its precision is high, cheap, and when working, energy consumption is low.
Constant-current source circuit 5 comprises resistance R13, potentiometer R14, resistance R15, resistance R16, polar capacitor C8, and triode Q5; The emitter of described triode Q5 is connected with its collector in turn after potentiometer R14, resistance R13, resistance R15 and resistance R16, its base stage is then connected with the tie point of resistance R15 and resistance R16 and end transmission circuit 6 simultaneously, and collector is ground connection after polar capacitor C8; The tie point of resistance R15 and resistance R13 is connected with the OUT pin of identification chip U1 and external power source simultaneously, and the collector of triode Q5 is also connected with the VS pin of identification chip U1 and end transmission circuit 6 simultaneously.
In addition, end transmission circuit 6 is by process chip U2, differential amplifier T3, the polar capacitor C9 that positive pole is connected with the CO pin of process chip U2, negative pole is connected with the CN pin of process chip U2 after resistance R17, the resistance R18 be in parallel with polar capacitor C9, the polar capacitor C10 that positive pole is connected with the FX pin of process chip U2 after resistance R19 through resistance R20, negative pole is then connected with the BE pin of process chip U2 forms; The inverting input of described differential amplifier T3 is connected with the BE pin of process chip U2, normal phase input end is connected with the collector of triode Q5, and the CO pin of process chip U2 is also connected with the base stage of triode Q5, FU pin is empty pin.In order to better implement the present invention, this process chip U2 is preferably LA6324 integrated chip, and its processing speed is fast, precision is high.
As mentioned above, invention can just well be realized.
Claims (6)
1. the novel recognition system of ETC frequency transformation, primarily of signal acquisition circuit (1), linear amplifier circuit (3), the signal recognition circuit (4) be connected with linear amplifier circuit (3), the constant-current source circuit (5) be connected with signal recognition circuit (4), and the end transmission circuit (6) to be connected with constant-current source circuit (5) forms, and it is characterized in that: be also provided with frequency-conversion circuit (2) between signal acquisition circuit (1) and linear amplifier circuit (3), described frequency-conversion circuit (2) is by operational amplifier T1, triode Q2, triode Q3, N pole is connected with the inverting input of operational amplifier T1 after potentiometer R8 through potentiometer R4 in turn, the diode D1 that P pole is then connected with the normal phase input end of operational amplifier T1 after resistance R3, N pole is connected with Acquisition Circuit, the thyristor D2 that P pole is then connected with the P pole of diode D1, one end is connected with the N pole of thyristor D2, the resistance R5 that the other end is connected with the positive pole of operational amplifier T1, N pole is connected with the N pole of thyristor D2 after resistance R6, the diode D3 that P pole is connected with the tie point of potentiometer R8 with potentiometer R4, one end is connected with the N pole of thyristor D2, the resistance R7 that the other end is then connected with the output terminal of operational amplifier T1 after resistance R9, and positive pole is connected with the emitter of triode Q2, the polar capacitor C4 that negative pole is connected with the output terminal of operational amplifier T1 forms, the emitter of described triode Q2 is connected with the inverting input of operational amplifier T1, collector is connected with the base stage of triode Q3, base stage is connected with the tie point of resistance R9 with resistance R7, the collector of triode Q3 is connected with the base stage of triode Q2, emitter is connected with the output terminal of operational amplifier T1, and the P pole of diode D1 is also connected with signal acquisition circuit (1).
2. the novel recognition system of a kind of ETC frequency transformation according to claim 1, it is characterized in that: described signal acquisition circuit (1) is by triode Q1, the polar capacitor C1 that positive pole is connected with the collector of triode Q1 after polar capacitor C3 through resistance R1 in turn, negative pole is then connected with the base stage of triode Q1, the polar capacitor C2 that positive pole is connected with the positive pole of polar capacitor C1 after resistance R2, negative pole is connected with the base stage of triode Q1 forms; Resistance R1 is connected with the N pole of thyristor D2 with the tie point of polar capacitor C3, and the emitter of triode Q1 is connected with the P pole of diode D1.
3. the novel recognition system of a kind of ETC frequency transformation according to claim 2, it is characterized in that: described linear amplifier circuit (3) is by operational amplifier T2, the polar capacitor C5 that positive pole is connected with the output terminal of operational amplifier T1, negative pole is connected with the inverting input of operational amplifier T2, the resistance R10 that one end is connected with the output terminal of operational amplifier T1, the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R11 forms; The sliding end of potentiometer R11 is connected with the negative pole of polar capacitor C5, and the normal phase input end of operational amplifier T2 is then simultaneously with the output terminal of operational amplifier T1 and signal recognition circuit (4) is connected, its output terminal is connected with signal recognition circuit (4).
4. the novel recognition system of a kind of ETC frequency transformation according to claim 3, it is characterized in that: described signal recognition circuit (4) is by identification chip U1, triode Q4, positive pole is connected with the emitter of triode Q3, the polar capacitor C6 that negative pole is connected with the collector of triode Q4, one end is connected with the positive pole of polar capacitor C6, the resistance R12 that the other end is connected with IN2 pin with the IN1 pin of identification chip U1 simultaneously, P pole is connected with the emitter of triode Q4, the diode D4 that N pole is connected with the normal phase input end of operational amplifier T2, positive pole is connected with the emitter of triode Q4, the polar capacitor C7 that negative pole is connected with the GAIN pin of identification chip U1, and N pole is connected with the OUT pin of identification chip U1, the diode D5 that P pole is then connected with the BYP pin of identification chip U1 forms, the VCC pin of described identification chip U1 is connected with the positive pole of polar capacitor C6, its GND pin is connected with VS pin, VS pin then simultaneously with the N pole of diode D4 and constant-current source circuit (5) is connected, OUT pin is connected with constant-current source circuit (5), the base stage of triode Q4 is connected with the output terminal of operational amplifier T2.
5. the novel recognition system of a kind of ETC frequency transformation according to claim 4, is characterized in that: described constant-current source circuit (5) comprises resistance R13, potentiometer R14, resistance R15, resistance R16, polar capacitor C8, and triode Q5; The emitter of described triode Q5 is connected with its collector in turn after potentiometer R14, resistance R13, resistance R15 and resistance R16, its base stage is then connected with the tie point of resistance R15 and resistance R16 and end transmission circuit (6) simultaneously, and collector is ground connection after polar capacitor C8; The tie point of resistance R15 and resistance R13 is connected with the OUT pin of identification chip U1 and external power source simultaneously, and the collector of triode Q5 is also connected with the VS pin of identification chip U1 and end transmission circuit (6) simultaneously.
6. the novel recognition system of a kind of ETC frequency transformation according to claim 5, it is characterized in that: described end transmission circuit (6) is by process chip U2, differential amplifier T3, the polar capacitor C9 that positive pole is connected with the CO pin of process chip U2, negative pole is connected with the CN pin of process chip U2 after resistance R17, the resistance R18 be in parallel with polar capacitor C9, the polar capacitor C10 that positive pole is connected with the FX pin of process chip U2 after resistance R19 through resistance R20, negative pole is then connected with the BE pin of process chip U2 forms; The inverting input of described differential amplifier T3 is connected with the BE pin of process chip U2, normal phase input end is connected with the collector of triode Q5, and the CO pin of process chip U2 is also connected with the base stage of triode Q5, FU pin is empty pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510121786.7A CN104766376A (en) | 2015-02-11 | 2015-03-19 | Novel frequency conversion identification system for ETC |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072334 | 2015-02-11 | ||
| CN2015100723344 | 2015-02-11 | ||
| CN201510121786.7A CN104766376A (en) | 2015-02-11 | 2015-03-19 | Novel frequency conversion identification system for ETC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104766376A true CN104766376A (en) | 2015-07-08 |
Family
ID=53648181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510121786.7A Pending CN104766376A (en) | 2015-02-11 | 2015-03-19 | Novel frequency conversion identification system for ETC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104766376A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2248895Y (en) * | 1995-05-03 | 1997-03-05 | 南京东潮工贸公司 | Far transmiting current-frequency transverter |
| CN1501590A (en) * | 1994-11-30 | 2004-06-02 | ���µ�����ҵ��ʽ���� | receiving circuit |
| CN101667304A (en) * | 2009-09-08 | 2010-03-10 | 北京握奇数据系统有限公司 | Charging device and system |
| US8339194B2 (en) * | 2010-12-02 | 2012-12-25 | Beken Corporation | Demodulator, a method for demodulating an ask signal and an on-board unit including the demodulator |
| CN102915571A (en) * | 2011-08-05 | 2013-02-06 | 深圳市金溢科技有限公司 | Road side unit and vehicle-mounted unit signal screening system and signal screening method |
| CN103778673A (en) * | 2013-04-23 | 2014-05-07 | 深圳市金溢科技有限公司 | Electronic communication device, electronic label and electronic non-stop charging system |
| CN203813772U (en) * | 2014-04-25 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Receiving circuit, receiving link, and on board unit |
-
2015
- 2015-03-19 CN CN201510121786.7A patent/CN104766376A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1501590A (en) * | 1994-11-30 | 2004-06-02 | ���µ�����ҵ��ʽ���� | receiving circuit |
| CN2248895Y (en) * | 1995-05-03 | 1997-03-05 | 南京东潮工贸公司 | Far transmiting current-frequency transverter |
| CN101667304A (en) * | 2009-09-08 | 2010-03-10 | 北京握奇数据系统有限公司 | Charging device and system |
| US8339194B2 (en) * | 2010-12-02 | 2012-12-25 | Beken Corporation | Demodulator, a method for demodulating an ask signal and an on-board unit including the demodulator |
| CN102915571A (en) * | 2011-08-05 | 2013-02-06 | 深圳市金溢科技有限公司 | Road side unit and vehicle-mounted unit signal screening system and signal screening method |
| CN103778673A (en) * | 2013-04-23 | 2014-05-07 | 深圳市金溢科技有限公司 | Electronic communication device, electronic label and electronic non-stop charging system |
| CN203813772U (en) * | 2014-04-25 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Receiving circuit, receiving link, and on board unit |
Non-Patent Citations (1)
| Title |
|---|
| 李新友等: "ETC系统中路边单元的设计", 《武汉理工大学学报（交通科学与工程版）》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205881193U (en) | Intelligence underground parking garage parking stall monitored control system based on BIM | |
| CN106507541A (en) | A kind of LED linear driver, drive circuit, chip and driving method | |
| CN104766377B (en) | Frequency conversion identification system with rapid processing function | |
| CN105974958A (en) | High-precision signal acquisition and processing system for digital temperature controller | |
| CN104408411A (en) | Novel image processing system | |
| CN104766376A (en) | Novel frequency conversion identification system for ETC | |
| CN201903573U (en) | Current detection and amplification circuit used for two-wire manufactured instrument | |
| CN104467697A (en) | Linear drive based bias current source amplifier system | |
| CN104458005A (en) | High-sensitivity infrared detection system based on linear driving | |
| CN208027549U (en) | An electronic information switching system | |
| CN204335054U (en) | A kind of two-stage low-pass filtering based on Linear Driving amplifies LED voltage-stabilizing system | |
| CN104766378A (en) | Self-gain control second-order filter ETC sensing system | |
| CN104766382A (en) | Novel recognition system for ETC | |
| CN208225279U (en) | A kind of long distance wireless mission controller | |
| CN106028510A (en) | Power amplifier circuit-based LED constant current output drive system | |
| CN204302994U (en) | A kind of New Image treatment system | |
| CN105813277A (en) | LED constant-current output drive system based on transistor oscillating circuit | |
| CN104457825A (en) | High-frequency conversion detection system with low heating value | |
| CN104766380A (en) | Sensing system for ETC | |
| CN104766381A (en) | ETC sensing system based on second-order filter circuit | |
| CN204313969U (en) | A kind of high sensitivity IR detection system based on Linear Driving | |
| CN104766383A (en) | ETC recognition system based on low-pass filtering circuit | |
| CN104602399A (en) | Linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system | |
| CN104767908A (en) | Image processing system with constant level for ETC | |
| CN203492100U (en) | Video amplification circuit for video monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150708 |
|
| WD01 | Invention patent application deemed withdrawn after publication |