CN203166887U - Wireless control signal emitter for parking charging system - Google Patents
Wireless control signal emitter for parking charging system Download PDFInfo
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- CN203166887U CN203166887U CN 201320124619 CN201320124619U CN203166887U CN 203166887 U CN203166887 U CN 203166887U CN 201320124619 CN201320124619 CN 201320124619 CN 201320124619 U CN201320124619 U CN 201320124619U CN 203166887 U CN203166887 U CN 203166887U
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Abstract
The utility model discloses a wireless control signal emitter for a parking charging system, which comprises a battery, an antenna, a microphone, a switch, a first triode, a second triode, an inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor. The wireless control signal emitter can be used in parking charging equipment to change present wired equipment into wireless equipment, thereby being able to reduce the cost and preventing lines from damages caused by being exposed to the sun and rain; the wireless control signal emitter requires only a 3V power supply and a half-wave antenna to achieve deep modulation, free of amplitude modulation, low distortion, long signal emission distance and stable work during use, and circuit power consumption is less than 5mA; a circuit is very stable during normal work, wherein frequency drift is very small, and interference is less; and thus, the wireless control signal emitter is very suitable for signal transmission of the wireless equipment.
Description
Technical field
The utility model relates to a kind of wireless signal transmitting device, relates in particular to a kind of wireless control signal reflector for stopping charging system.
Background technology
Present parking lot substantially all is to use IC-card, then in conjunction with the form of manual toll collection.The method is exactly in import and outlet an IC-card card reader to be installed respectively, when vehicle enters, by the turnover time of the registration of vehicle of swiping the card, charge according to expenses standard then, the installation of these equipment all is wired facility in the prior art, and wiring needs cost higher, and aging and break down easily.The small-power frequency modulation emitter circuit that existing signal projector adopts, great majority adopt integrated circuit to constitute, its sensitivity and definition are relatively poor, power consumption is high, therefore can cause modulation degree more shallow, produce that amplitude modulation(PAM) is excessive, distortion is big, transmitting range is short, job insecurity and the big phenomenon of frequency drift, so do not fit into the improvement of stopping charging system.
Summary of the invention
The purpose of this utility model provides a kind of wireless control signal reflector for stopping charging system with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises battery, antenna, microphone, switch, first triode, second triode, inductance, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, the positive pole of described battery is connected with an end of described switch, the other end while of described switch and first end of described the 6th electric capacity, first end of described inductance, first end of described the 4th electric capacity, first end of described the 4th resistance, first end of described the 3rd resistance is connected with first end of described first resistance, the negative pole while of described battery and second end of described the 6th electric capacity, first end of described the 5th resistance, first end of described the 3rd electric capacity, first end of the emitter of described first triode and described microphone is connected, second end of described microphone is connected with second end of described first resistance and first end of described first electric capacity simultaneously, second end of described first electric capacity is connected with the base stage of described first triode and first end of described second resistance simultaneously, second end while of described second resistance and second end of described the 3rd resistance, first end of described second electric capacity is connected with the base stage of described first triode, second end while of described second electric capacity and second end of described the 4th resistance, second end of the base stage of described second triode and described the 3rd electric capacity is connected, the emitter of described second triode is connected with second end of described the 5th resistance and first end of described the 5th electric capacity simultaneously, the collector electrode while of described second triode and second end of described the 4th electric capacity, second end of described inductance, second end of described antenna and described the 5th electric capacity is connected.
Further, described the 5th electric capacity is variable capacitance; Described first triode and described second triode are NPN type triode.
The beneficial effects of the utility model are:
The utility model is used for Car park payment equipment, make existing wireline equipment into wireless device, can either reduce cost, can avoid circuit to damage because exposing to the sun and rain again, and the utility model power output is no more than 5-8mW, transmitting boundary is about the house district can be to 300 meters, only needing just has so emissivities with 3V power supply and half-wave antenna, therefore, in use modulation degree does not produce deeply, that amplitude modulation(PAM), distortion are little, distance, working stability are sent in the signal emission, the circuit power consumption is less than 5mA, but with two pieces of dry cell continuous operations 80 to 100 hours; Therefore circuit is highly stable in normal operation, and frequency drift is very little, disturbs lessly, is suitable for very much the signal transmission of wireless device.
Description of drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1: the utility model comprises battery E, antenna ANT, microphone MIC, switch SW, the first triode Q1, the second triode Q2, inductance L, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5 and the 6th capacitor C 6, the positive pole of battery E is connected with an end of switch SW, the other end while of switch SW and first end of the 6th capacitor C 6, first end of inductance L, first end of the 4th capacitor C 4, first end of the 4th resistance R 4, first end of the 3rd resistance R 3 is connected with first end of first resistance R 1, the negative pole while of battery E and second end of the 6th capacitor C 6, first end of the 5th resistance R 5, first end of the 3rd capacitor C 3, first end of the emitter of the first triode Q1 and microphone MIC is connected, second end of microphone MIC is connected with second end of first resistance R 1 and first end of first capacitor C 1 simultaneously, second end of first capacitor C 1 is connected with the base stage of the first triode Q1 and first end of second resistance R 2 simultaneously, second end while of second resistance R 2 and second end of the 3rd resistance R 3, first end of second capacitor C 2 is connected with the base stage of the first triode Q1, second end while of second capacitor C 2 and second end of the 4th resistance R 4, the base stage of the second triode Q2 is connected with second end of the 3rd capacitor C 3, the emitter of the second triode Q2 is connected with second end of the 5th resistance R 5 and first end of the 5th capacitor C 5 simultaneously, the collector electrode while of the second triode Q2 and second end of the 4th capacitor C 4, second end of inductance L, antenna ANT is connected with second end of the 5th capacitor C 5; The 5th capacitor C 5 is variable capacitance; The first triode Q1 and the second triode Q2 are NPN type triode.
As shown in Figure 1: actually in the microphone MIC of the present utility model keep one piece of FET, FET with microphone MIC before the capacitance variations of vibrating diaphragm amplify the very sensitive reason of microphone that Here it is.Audio frequency amplifies is served as by the first triode Q1, gains about 20 to 50.Amplifying signal is sent to the base stage of the oscillator stage second triode Q2.The second triode Q2 works in 88MHz approximately, and this frequency is adjusted by oscillator coil (5 circles) and the 4th capacitor C 4 totally, and this frequency also is decided by the second triode Q2,18pF tunable capacitor the 5th capacitor C 5 and biased element (as the 5th resistance R 5 and the 4th resistance R 4).Behind the power connection, the 3rd capacitor C 3 is charged gradually by the 4th resistance R 4, and the 5th capacitor C 5 is then charged through oscillator coil and the 5th resistance R 5, but faster; 47pF the 4th capacitor C 4 is also charged (though very little voltage is just won at its two ends), and coil produces magnetic field simultaneously.When base voltage rises gradually, the second triode Q2 conducting, and effectively internal resistance is attempted by 18pF the 5th capacitor C 5 both sides.Base voltage continue to rise, and the 5th capacitor C 5 attempts to stop the movement of emitter potential, and when the depleted of energy in the electric capacity no longer stoped emitter potential mobile, voltage reduced between base stage and the emitter-base bandgap grading, and triode ends, and the electric current of inflow coil also stops, and magnetic field is declined routed.And produce a reverse voltage, collector potential rises from 2.9V originally and surpasses 3V, and in the opposite direction to the charging of the 4th capacitor C 4, this voltage also simultaneously to 5 chargings of the 5th capacitor C and increased voltage drop on the 5th resistance R 5, makes triode enter darker cut-off state.Consumption along with back-emf energy on the inductance L, the emitter potential of the second triode Q2 descends, and drop to triode and begin conducting, electric current flows into coil reverses the voltage on the coil again, the formation collector potential descends, and be sent to emitter-base bandgap grading by the 5th capacitor C 5, and making the second triode Q2 saturation conduction, the cycle begins repetition again.Make the second triode Q2 form vibration, produce the AC signal of 88MHz.Burst into base stage, the change frequency of oscillation of the second triode Q2 through 1 μ F electric capacity from the audio signal after the prime amplification, produce required FM signal.
Claims (3)
1. wireless control signal reflector that is used for stopping charging system, it is characterized in that: comprise battery, antenna, microphone, switch, first triode, second triode, inductance, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, the positive pole of described battery is connected with an end of described switch, the other end while of described switch and first end of described the 6th electric capacity, first end of described inductance, first end of described the 4th electric capacity, first end of described the 4th resistance, first end of described the 3rd resistance is connected with first end of described first resistance, the negative pole while of described battery and second end of described the 6th electric capacity, first end of described the 5th resistance, first end of described the 3rd electric capacity, first end of the emitter of described first triode and described microphone is connected, second end of described microphone is connected with second end of described first resistance and first end of described first electric capacity simultaneously, second end of described first electric capacity is connected with the base stage of described first triode and first end of described second resistance simultaneously, second end while of described second resistance and second end of described the 3rd resistance, first end of described second electric capacity is connected with the base stage of described first triode, second end while of described second electric capacity and second end of described the 4th resistance, second end of the base stage of described second triode and described the 3rd electric capacity is connected, the emitter of described second triode is connected with second end of described the 5th resistance and first end of described the 5th electric capacity simultaneously, the collector electrode while of described second triode and second end of described the 4th electric capacity, second end of described inductance, second end of described antenna and described the 5th electric capacity is connected.
2. wireless control signal reflector according to claim 1, it is characterized in that: described the 5th electric capacity is variable capacitance.
3. wireless control signal reflector according to claim 1, it is characterized in that: described first triode and described second triode are NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320124619 CN203166887U (en) | 2013-03-19 | 2013-03-19 | Wireless control signal emitter for parking charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320124619 CN203166887U (en) | 2013-03-19 | 2013-03-19 | Wireless control signal emitter for parking charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166887U true CN203166887U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320124619 Expired - Fee Related CN203166887U (en) | 2013-03-19 | 2013-03-19 | Wireless control signal emitter for parking charging system |
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| Country | Link |
|---|---|
| CN (1) | CN203166887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065389A (en) * | 2013-03-19 | 2014-09-24 | 成都凯智科技有限公司 | Wireless control signal emitter applied to parking charge system |
-
2013
- 2013-03-19 CN CN 201320124619 patent/CN203166887U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065389A (en) * | 2013-03-19 | 2014-09-24 | 成都凯智科技有限公司 | Wireless control signal emitter applied to parking charge system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN SHIJI HUTONG ELECTRICAL ENGINEERING CO., L Free format text: FORMER OWNER: CHENGDU KAIZHI TECHNOLOGY CO., LTD. Effective date: 20140626 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140626 Address after: 610000 grand World Plaza, Xinguang Road, hi tech Zone, Sichuan, Chengdu, B-3-A3 Patentee after: Sichuan Shiji Hutong Electrical Engineering Co., Ltd. Address before: 610000 Sichuan Province, Chengdu Tianfu Avenue North No. 1480 high-tech incubator Park Building No. 11 West 5-2505 Patentee before: Chengdu Kaizhi Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |