CN210327614U - CAN differential signal conversion circuit for scooter communication - Google Patents
CAN differential signal conversion circuit for scooter communication Download PDFInfo
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- CN210327614U CN210327614U CN201920914672.1U CN201920914672U CN210327614U CN 210327614 U CN210327614 U CN 210327614U CN 201920914672 U CN201920914672 U CN 201920914672U CN 210327614 U CN210327614 U CN 210327614U
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Abstract
The utility model discloses a CAN differential signal conversion circuit for scooter communication, including CAN communication level conversion chip U1, CAN communication level conversion chip U1's CAN _ RX pin is connected with scooter controller's communication output terminal, CAN communication level conversion chip U1's CAN _ TX pin is connected with scooter controller's communication input terminal; the CANH pin of the CAN communication level conversion chip U1 is used as the output end of the first path of differential signal CANH, and the CANL pin of the CAN communication level conversion chip U1 is used as the output end of the second path of differential signal CANL. The utility model discloses convert the single line signal to differential signal, guarantee the reliability of signal, improve transmission efficiency to love oneself on communication loop, the signal is transmitted with the form of difference, increases communication signal's stability, is applicable to the communication operating mode of scooter.
Description
Technical Field
The utility model relates to an electronic circuit technical field, concretely relates to CAN differential signal conversion circuit for scooter communication.
Background
The scooter is a novel product form for the scooter motion after a traditional scooter. The scooter speed can reach 20 km/h, and the scooter is a simple labor-saving motion machine. Along with the rapid development of electronic science and technology, the intelligent degree of scooter is higher and higher, and with that, data communication's problem has come to produce.
At present, in the data communication mode of the slide car on the market, the signal transmission is basically carried out by adopting a serial port communication mode, and the following problems exist:
(1) the communication speed of the serial communication mode is relatively slow, so that a one-to-many communication mode cannot be realized, and the expansion of the interface of the scooter is limited;
(2) the serial port communication mode has poor anti-interference performance, and because the form environment of the scooter is more changeable and severe, the serial port communication transmission receives external interference, the phenomenon that transmission data is unstable and lost packets exists, and even the scooter breaks down.
Therefore, how to overcome the above problems is an urgent need to solve the data communication of the current scooter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming among the data communication mode of current scooter, adopt the mode of serial ports communication to carry out signal transmission's problem basically. The utility model discloses a CAN differential signal conversion circuit for scooter communication adopts the CAN communication to carry out signal communication, and the signal passes through CAN communication level conversion chip TLE6250GV33, converts the single line signal to differential signal, guarantees the reliability of signal, improves transmission efficiency to love certainly on the communication return circuit, the signal is transmitted with the form of difference, increases communication signal's stability, is applicable to the communication operating mode of scooter, and the circuit is simple, realizes easily, has good application prospect.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a CAN differential signal conversion circuit for scooter communication comprises a CAN communication level conversion chip U1,
a CAN _ RX pin of the CAN communication level conversion chip U1 is connected with a communication output terminal of the scooter controller, and a CAN _ TX pin of the CAN communication level conversion chip U1 is connected with a communication input terminal of the scooter controller;
a CANH pin of the CAN communication level conversion chip U1 is used as an output end of a first path of differential signal CANH, and a CANL pin of the CAN communication level conversion chip U1 is used as an output end of a second path of differential signal CANL;
the CANH pin is connected with one end of a matching resistor R2 through a first current limiting resistor R1, and the CANL pin is connected with the other end of the matching resistor R2 through a second current limiting resistor R3;
the first current limiting resistor R1 and the matching resistor R2 are connected with the ground through a first filter capacitor C1, and the second current limiting resistor R3 and the matching resistor R2 are connected with the ground through a second filter capacitor C2.
In the above CAN differential signal conversion circuit for scooter communication, the model of the CAN communication level conversion chip U1 is a TLE6250GV33 chip.
In the above CAN differential signal conversion circuit for scooter communication, the VCC power pin of the CAN communication level conversion chip U1 is connected to ground through the third filter capacitor C3 and is externally connected to 5V voltage; a V3.3v pin of the CAN communication level conversion chip U1 is connected with the ground through a fourth filter capacitor C4 and is externally connected with 3.3 voltage; the GND grounding pin of the CAN communication level conversion chip U1 is connected with the ground, and the ground is connected with the bottom plate of the metal shell of the scooter.
In the above CAN differential signal conversion circuit for scooter communication, the resistance value of the matching resistor R2 is 1K Ω.
In the above CAN differential signal conversion circuit for scooter communication, the capacitance values of the first filter capacitor C1 and the second filter capacitor C2 are 33 pF.
In the above CAN differential signal conversion circuit for scooter communication, the CAN _ RX pin of the CAN communication level conversion chip U1 is further connected to ground through a fifth filter capacitor C5, and the capacitance value of the fifth filter capacitor C5 is 20 pF.
The utility model has the advantages that: the utility model discloses a CAN differential signal conversion circuit for scooter communication adopts the CAN communication to carry out signal communication, and the signal passes through CAN communication level conversion chip TLE6250GV33, converts the single line signal to differential signal, guarantees the reliability of signal, improves transmission efficiency to love certainly on the communication return circuit, the signal is transmitted with the form of difference, increases communication signal's stability, is applicable to the communication operating mode of scooter, and the circuit is simple, realizes easily, has good application prospect.
Drawings
Fig. 1 is a circuit diagram of the utility model discloses a CAN differential signal conversion circuit for scooter communication.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in FIG. 1, the CAN differential signal conversion circuit for scooter communication of the present invention comprises a CAN communication level conversion chip U1,
a CAN _ RX pin of the CAN communication level conversion chip U1 is connected with a communication output terminal of the scooter controller, and a CAN _ TX pin of the CAN communication level conversion chip U1 is connected with a communication input terminal of the scooter controller;
a CANH pin of the CAN communication level conversion chip U1 is used as an output end of a first path of differential signal CANH, and a CANL pin of the CAN communication level conversion chip U1 is used as an output end of a second path of differential signal CANL;
the CANH pin is connected with one end of a matching resistor R2 through a first current limiting resistor R1, and the CANL pin is connected with the other end of the matching resistor R2 through a second current limiting resistor R3;
the first current limiting resistor R1 and the matching resistor R2 are connected with the ground through a first filter capacitor C1, and the second current limiting resistor R3 and the matching resistor R2 are connected with the ground through a second filter capacitor C2.
The first current limiting resistor R1 and the second current limiting resistor R3 CAN prevent the problem that the CAN communication level conversion chip U1 or other electronic components are burnt out due to overlarge current after signals are interfered (such as electrostatic interference).
Preferably, the model of the CAN communication level conversion chip U1 is a TLE6250GV33 chip or other CAN communication level conversion special chips, and the CAN communication level conversion chip has moderate cost, low power consumption and strong anti-interference performance and is suitable for the running environment of the scooter.
Preferably, a VCC power pin of the CAN communication level conversion chip U1 is connected to ground through a third filter capacitor C3 and is externally connected to a 5V voltage; a V3.3v pin of the CAN communication level conversion chip U1 is connected with the ground through a fourth filter capacitor C4 and is externally connected with 3.3 voltage; the GND ground pin of CAN communication level conversion chip U1 is connected with ground, ground is connected with the metal casing bottom plate of scooter, carries out filtering to supply voltage, CAN reduce the fluctuation of power, and the stability of raising the voltage guarantees the normal reliable work of CAN communication level conversion chip U1.
Preferably, an INH control pin of the CAN communication level conversion chip U1 is connected to a control chip switch signal terminal of the scooter controller, and the CAN communication level conversion chip U1 does not operate when the control chip switch signal terminal of the scooter controller is set high; the switch signal terminal of the control chip of the scooter controller is lowered, the CAN communication level conversion chip U1 works normally, and the CAN communication level conversion chip U1 CAN be dormant when not in use, so that the energy consumption is saved.
Preferably, the resistance value of the matching resistor R2 is 1K Ω, so that the first path of differential signal CANH and the second path of differential signal CANL can be reasonably matched, and the transmission effect is ensured.
Preferably, the capacitance values of the first filter capacitor C1 and the second filter capacitor C2 are 33pF, so that spurious signals transmitted through the circuit in the first path of differential signal CANH and the second path of differential signal CANL are reduced, and reliable and stable signals are ensured.
Preferably, CAN _ RX pin of CAN communication level conversion chip U1 still is connected with ground through fifth filter capacitor C5, the appearance value of fifth filter capacitor C5 is 20pF, CAN reduce external interference when receiving scooter controller communication output's signal, more CAN adapt to the special environment of scooter work, improves the reliability and the real-time of transmission data.
The utility model discloses a CAN difference signal conversion circuit for scooter communication, the theory of operation is as follows: when the scooter controller sends data to the bus through the CAN communication level conversion chip U1, a CAN _ RX signal is converted into two differential signals of CANH and CANL, and the two differential signals are transmitted to ensure real-time performance and reliability; when the CAN communication level conversion chip U1 receives data from the bus, two differential signals of CNAH and CANL are converted into CAN _ TX and transmitted to the scooter controller, so that CAN communication of the scooter controller is transmitted and received, the problems of poor serial port communication stability and poor real-time performance are solved, and the CAN communication level conversion chip U1 is more suitable for the working condition of scooter communication through the design of a filter capacitor.
To sum up, the utility model discloses a CAN difference signal conversion circuit for scooter communication adopts the CAN communication to carry out signal communication, and the signal passes through CAN communication level conversion chip TLE6250GV33, converts the single line signal to difference signal, guarantees the reliability of signal, improves transmission efficiency to love oneself on communication loop, the signal is transmitted with the form of difference, increases communication signal's stability, is applicable to the communication operating mode of scooter, and the circuit is simple, realizes easily, has good application prospect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A CAN differential signal conversion circuit for scooter communication is characterized in that: including a CAN communication level conversion chip U1,
a CAN _ RX pin of the CAN communication level conversion chip U1 is connected with a communication output terminal of the scooter controller, and a CAN _ TX pin of the CAN communication level conversion chip U1 is connected with a communication input terminal of the scooter controller;
a CANH pin of the CAN communication level conversion chip U1 is used as an output end of a first path of differential signal CANH, and a CANL pin of the CAN communication level conversion chip U1 is used as an output end of a second path of differential signal CANL;
the CANH pin is connected with one end of a matching resistor R2 through a first current limiting resistor R1, and the CANL pin is connected with the other end of the matching resistor R2 through a second current limiting resistor R3;
the first current limiting resistor R1 and the matching resistor R2 are connected with the ground through a first filter capacitor C1, and the second current limiting resistor R3 and the matching resistor R2 are connected with the ground through a second filter capacitor C2.
2. The CAN differential signal conversion circuit for scooter communication of claim 1, wherein: the model of the CAN communication level conversion chip U1 is a TLE6250GV33 chip.
3. The CAN differential signal conversion circuit for scooter communication of claim 2, wherein: a VCC power pin of the CAN communication level conversion chip U1 is connected with the ground through a third filter capacitor C3 and is externally connected with 5V voltage; a V3.3v pin of the CAN communication level conversion chip U1 is connected with the ground through a fourth filter capacitor C4 and is externally connected with 3.3 voltage; the GND grounding pin of the CAN communication level conversion chip U1 is connected with the ground, and the ground is connected with the bottom plate of the metal shell of the scooter.
4. The CAN differential signal conversion circuit for scooter communication of claim 1, wherein: the resistance value of the matching resistor R2 is 1K omega.
5. The CAN differential signal conversion circuit for scooter communication of claim 4, wherein: the capacitance values of the first filter capacitor C1 and the second filter capacitor C2 are 33 pF.
6. The CAN differential signal conversion circuit for scooter communication of claim 1, wherein: the CAN _ RX pin of the CAN communication level conversion chip U1 is also connected with the ground through a fifth filter capacitor C5, and the capacitance value of the fifth filter capacitor C5 is 20 pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920914672.1U CN210327614U (en) | 2019-06-18 | 2019-06-18 | CAN differential signal conversion circuit for scooter communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920914672.1U CN210327614U (en) | 2019-06-18 | 2019-06-18 | CAN differential signal conversion circuit for scooter communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210327614U true CN210327614U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920914672.1U Active CN210327614U (en) | 2019-06-18 | 2019-06-18 | CAN differential signal conversion circuit for scooter communication |
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| Country | Link |
|---|---|
| CN (1) | CN210327614U (en) |
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2019
- 2019-06-18 CN CN201920914672.1U patent/CN210327614U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20210324 Address after: 213000 No.9, Xinyong Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: CHANGZHOU TAOCHEN ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 213000 Business Center B-601, Changzhou Science and Education City, No. 18 Changwu Middle Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU TAOTAO INTELLIGENT TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |