CN202887184U - Passive and wireless serial communication system - Google Patents
Passive and wireless serial communication system Download PDFInfo
- Publication number
- CN202887184U CN202887184U CN 201220601341 CN201220601341U CN202887184U CN 202887184 U CN202887184 U CN 202887184U CN 201220601341 CN201220601341 CN 201220601341 CN 201220601341 U CN201220601341 U CN 201220601341U CN 202887184 U CN202887184 U CN 202887184U
- Authority
- CN
- China
- Prior art keywords
- circuit
- input end
- serial communication
- passive
- radio
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The utility model provides a passive and wireless serial communication system. The input end of a signal wire power-taking circuit is connected with a serial interface of a device, the output end is connected with the input end of a battery charging circuit, the output end of the battery charging circuit is connected with the input end of a voltage-stabilizing power supply circuit, the output end of the voltage-stabilizing power supply circuit is respectively connected with the input end of a serial communication circuit and the input end of a radio frequency transmitting and receiving circuit, the other input end of the serial communication circuit is connected with the serial interface of the device, the output end of the serial communication circuit is connected with the other input end of the radio frequency transmitting and receiving circuit, and the output end of the radio frequency transmitting and receiving circuit is connected with an antenna device. The passive and wireless serial communication system provided by the utility model does not need an independent power supply for supplying power, additional field wiring is not required, and the passive and wireless serial communication system can be applied to industrial and civil fields.
Description
Technical field
The utility model relates to the bottom communication, particularly a kind of passive and wireless serial communications system of each equipment in industry and the civilian automatic field.
Background technology
Traditional RS485 serial ports transmission is very ripe technically.Should have this serial ports to carry out the technical grade of data bottom transmission, civilian level equipment is numerous, application is extensive.Because it is simple in structure, to realize easily, job stability has been tending towards ripe through the widespread use of decades.But when actual field is used, a lot of weak points should be arranged.It all is to implement afterwards for many years the equipment room difficult wiring in the equipment operation that a lot of serial ports are used.A lot of equipment are given circuit supply own by non-civil power, and serial port terminal is difficult to carry out powered operation by independent current source.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of independent current source power supply that do not need, and does not need extra field wiring, is applied to the passive and wireless serial communications system at industry and civilian scene.
In order to achieve the above object, the technical scheme that the utility model proposes is: a kind of passive and wireless serial communications system comprises signal wire power-supply circuit, battery charger, voltage stabilizing power supplying circuit, serial communication circuit, radio-frequency transmissions and receiving circuit and antenna assembly; The input end connection device serial line interface of signal wire power-supply circuit wherein, output terminal connects the input end of battery charger, the output terminal of battery charger connects the input end of voltage stabilizing power supplying circuit, the output terminal of voltage stabilizing power supplying circuit is connected with the input end of receiving circuit with input end, the radio-frequency transmissions of serial communication circuit respectively, another input end connection device serial line interface of serial communication circuit, the output terminal of serial communication circuit connects another input end of radio-frequency transmissions and receiving circuit, and radio-frequency transmissions is connected antenna assembly with the output terminal of receiving circuit.
Described signal wire power-supply circuit comprises commutation diode, decoupling capacitor and three-terminal voltage-stabilizing feed regulator isolator.
Described battery charger is the circuit that charges the battery by current constant mode.
Described serial communication circuit adopts the Atmega8 single-chip microcomputer, and ATmega8 is based on 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture of enhancing.
Described radio-frequency transmissions and receiving circuit comprise frequency modulator, the receiver with detuner, power amplifier, crystal oscillator and regulator.
Utility model has following beneficial effect and advantage:
1. provide wireless solution by the utility model for the place of old scene and difficult wiring, thereby realize realizing on the basis that need not to increase cable cost and cost of labor the communication of equipment room, save the working time, increase work efficiency;
2. can allow the scene of a lot of civil power access difficulties realize the wireless transmission of communication signal by the utility model.Obtain power voltage supply by signal wire, use pressure stabilizing device and built-in rechargeable battery and realize the internal stability power supply, the wireless telecommunications between radio-frequency apparatus are provided;
3. can realize simultaneously co-ordinations of many serial bus in same scope by the step selection of radio-frequency power and the selection of transmit frequency band by the utility model, to realize on-the-spot strict demand to Realtime Capability of Communication;
4. can realize the quick access of terminal device by the utility model, because this terminal is small and exquisite, not need reservation equipment screen body space, can directly be articulated in the serial ports place of equipment.
Description of drawings
Fig. 1 is system global structure figure of the present utility model.
Embodiment
Be illustrated in figure 1 as system global structure figure of the present utility model.Comprise signal wire power-supply circuit, rechargeable battery charging circuit, voltage stabilizing power supplying circuit, serial communication circuit, radio-frequency transmissions and receiving circuit.
Wherein the signal wire power-supply circuit comprises commutation diode, decoupling capacitor and CYT78L05 three-terminal voltage-stabilizing feed regulator isolator composition.CYT78L05 can be used as Zener diode/resistor combination and replace.It provides the effective product of two orders of magnitude to improve impedance, low quiescent current.These characteristics make voltage stabilizer provide a scheme that well solves the noise problem to the machine or integrated circuit board voltage stabilizing.
For continual and steady power supply being provided for serial port circuit and RF transmit-receive circuit, comprise the rechargeable battery charging circuit in the utility model.Serial connection charge is simpler than charged in parallel, shortcoming is that the battery request volume ratio is more consistent, linear voltage decreasing is simpler than switch step-down, shortcoming is that the relatively lower heating of efficient is large, the impact of heating macrocell life-span is also not little but large current charge saves time, the shortcoming whether negative slope or zero increment detecting battery are full of is that circuit is complicated and because the relation of battery performance is also unreliable, it is constant current that the charging modes great majority of current battery are recommended.So the functional characteristics that simple and reliable charger will be finished should have: can fill multiple batteries, constant-current charging function is arranged, prevent from overcharging function.Implementation method is in fact very simple: series connection, constant voltage, constant current.If charge with stabilized voltage supply, the initial stage electric current is too large, if seal in current-limiting resistance, resistance has just limited charging current and makes the duration of charging long after cell voltage raises.Constant current constant voltage is relative, should be constant current later stage constant voltage in early stage specifically, and this mode is fit to lithium cell charging very much.
Voltage stabilizing power supplying circuit is to make the voltage of battery output provide stable power supply supply to the serial port circuit of terminal and radio-frequency transmissions and receiving circuit.The increase of terminal tenure of use and the variation (such as temperature, humidity etc.) of environmental baseline must be considered the impact of rechargeable battery output voltage, so voltage stabilizing power supplying circuit will be owing to eliminating this impact.By the negative feedback of output voltage, thereby obtain reliable and stable supply voltage output.
The utility model adopts the Atmega8 single-chip microcomputer in the AVR single-chip microcomputer series in the serial communication circuit design, and ATmega8 is based on 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture of enhancing.Because its advanced instruction set and single clock cycle instruction time, the data throughput of ATmega8 is up to 1MIPS/MHz, thereby can extenuate the contradiction of system between power consumption and processing speed.
The utility model adopts the nRF905 chip of Nordic company in radio-frequency transmissions and receiving circuit, nRF905 monolithic wireless transceiver is operated in the ISM band of 433/868/915MHz, by a fully-integrated frequency modulator, receiver with detuner, a power amplifier, a crystal oscillator and a regulator form.The characteristics of Shock Burst mode of operation are automatically to produce lead code and CRC.Can be easy to carry out programmed configurations by the SPI interface, current loss is low, in emissive power be-during 10dBm, transmitter current is 11mA, received current is 12.5mA.Enter the POWERDOWN pattern and can be easy to realize economize on electricity.Inner integrated modulator adopts the modulation system of GFSK, and digital signal and carrier wave are modulated, and detuner carries out demodulation to it, if need to consider the harmony of modulating with GFSK when therefore using soft-modulation.The utility model has designed and produced the application circuit schematic diagram of chip according to the chip handbook, its emitting antenna adopts the antenna of the impedance matching of 50 Ω, adopts the more stable tantalum electric capacity of performance and capacitive reactance and chip inductor to make up radio receiving transmitting module.
Claims (5)
1. a passive and wireless serial communications system is characterized in that, comprises signal wire power-supply circuit, battery charger, voltage stabilizing power supplying circuit, serial communication circuit, radio-frequency transmissions and receiving circuit and antenna assembly; The input end connection device serial line interface of signal wire power-supply circuit wherein, output terminal connects the input end of battery charger, the output terminal of battery charger connects the input end of voltage stabilizing power supplying circuit, the output terminal of voltage stabilizing power supplying circuit is connected with the input end of receiving circuit with input end, the radio-frequency transmissions of serial communication circuit respectively, another input end connection device serial line interface of serial communication circuit, the output terminal of serial communication circuit connects another input end of radio-frequency transmissions and receiving circuit, and radio-frequency transmissions is connected antenna assembly with the output terminal of receiving circuit.
2. by passive and wireless serial communications system claimed in claim 1, it is characterized in that, described signal wire power-supply circuit comprises commutation diode, decoupling capacitor and three-terminal voltage-stabilizing feed regulator isolator.
3. by passive and wireless serial communications system claimed in claim 1, it is characterized in that, described battery charger is the circuit that charges the battery by current constant mode.
4. by passive and wireless serial communications system claimed in claim 1, it is characterized in that, described serial communication circuit adopts the Atmega8 single-chip microcomputer, and ATmega8 is based on 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture of enhancing.
5. by passive and wireless serial communications system claimed in claim 1, it is characterized in that, described radio-frequency transmissions and receiving circuit comprise frequency modulator, the receiver with detuner, power amplifier, crystal oscillator and regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601341 CN202887184U (en) | 2012-11-14 | 2012-11-14 | Passive and wireless serial communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601341 CN202887184U (en) | 2012-11-14 | 2012-11-14 | Passive and wireless serial communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202887184U true CN202887184U (en) | 2013-04-17 |
Family
ID=48078588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220601341 Expired - Lifetime CN202887184U (en) | 2012-11-14 | 2012-11-14 | Passive and wireless serial communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202887184U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071816A (en) * | 2019-04-03 | 2019-07-30 | 深圳艾迪宝智能系统有限公司 | A kind of serial communication modular |
| CN110264024A (en) * | 2019-02-25 | 2019-09-20 | 深圳艾迪宝智能系统有限公司 | A kind of investigating method and system of frozen products insulated container group |
-
2012
- 2012-11-14 CN CN 201220601341 patent/CN202887184U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110264024A (en) * | 2019-02-25 | 2019-09-20 | 深圳艾迪宝智能系统有限公司 | A kind of investigating method and system of frozen products insulated container group |
| CN110071816A (en) * | 2019-04-03 | 2019-07-30 | 深圳艾迪宝智能系统有限公司 | A kind of serial communication modular |
| CN110071816B (en) * | 2019-04-03 | 2021-08-31 | 深圳艾迪宝智能系统有限公司 | Serial port communication module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103269132B (en) | Sensor power supply method and power supply device | |
| CN104467926B (en) | A kind of bluetooth communication box and the method for data communication | |
| CN204030732U (en) | A kind of wireless charging device based on NFC | |
| CN202405844U (en) | Wireless charging device for small electronic equipment | |
| CN108988511A (en) | A kind of efficient wireless charging method and wireless charging device | |
| CN202889340U (en) | Low-power short-distance wireless data transmission module | |
| CN202887184U (en) | Passive and wireless serial communication system | |
| CN103970295A (en) | Mouse with power supplied by wireless power supply | |
| CN204968123U (en) | Portable micropower wireless communication network debugs device | |
| CN105637373A (en) | Wireless power receiver, control circuit therefor, electronic device using same, and calculation method for reception power | |
| CN204190767U (en) | A kind of bluetooth communication box | |
| CN206323220U (en) | A kind of wireless charging system | |
| CN202694400U (en) | Active electronic tag with high activation performance | |
| CN203242119U (en) | High-voltage electric power equipment non-contact early warning system | |
| CN104539026A (en) | Charging method and charging device. | |
| CN203551782U (en) | Portable Beidou RD communication device | |
| CN106503775A (en) | Being taken based on the television tower of RFID can energy supplying system | |
| CN203596667U (en) | Wireless memory based on magnetic coupling resonant mode power supply | |
| CN202854848U (en) | Bluetooth wireless RFID tag reading apparatus | |
| CN107808942A (en) | Self-shield vehicle mounted electric pitches Vehicular battery management system | |
| CN204391908U (en) | A kind of panel computer of wireless power | |
| CN208241371U (en) | A kind of pair is filled wireless charging transmitter | |
| CN203761431U (en) | Handset housing for handset wireless charging | |
| CN208255426U (en) | A kind of wireless positioning terminal based on LoRa communication | |
| CN205377864U (en) | Intelligence WIFI control module group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |