CN112712684A - Portable bluetooth 485 conversion boxes for automobile debugging - Google Patents
Portable bluetooth 485 conversion boxes for automobile debugging Download PDFInfo
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- CN112712684A CN112712684A CN202011484493.2A CN202011484493A CN112712684A CN 112712684 A CN112712684 A CN 112712684A CN 202011484493 A CN202011484493 A CN 202011484493A CN 112712684 A CN112712684 A CN 112712684A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses a portable Bluetooth 485 conversion box for automobile debugging, and relates to the technical field of automobile electronics. In the invention: one end of the level conversion circuit is connected with the UART _ TXD through an electric signal; the level conversion circuit is provided with a resistor R7 connected with the UART _ TXD, one end of a resistor R7 is connected with a triode Q1, and a resistor R7 is connected with a base set of the triode; a resistor R5 is connected between the resistor R7 and the UART _ TXD in a branching mode, the resistor R5 is connected with the collector of the triode Q1 through the resistor R3, and the emitter of the triode Q1 is grounded; the level conversion circuit comprises an RS485 chip, and the receiving and transmitting control end of the RS485 chip is connected with the collector of the triode Q1. The invention realizes the wireless connection of the automobile equipment and the tool equipment, avoids the defects of wired transmission connection, improves the convenience and prolongs the service life of the automobile interface.
Description
Technical Field
The invention belongs to the technical field of automotive electronics, and particularly relates to a portable Bluetooth 485 conversion box for automobile debugging.
Background
The debugging of present automobile manufacture factory to whole car generally carries out the debugging of scene and mill based on the mode that computer and data line are connected, and this kind of debugging mode has very big not enough, because space and environmental constraint, the debugging personnel are connected to the data interface of car with a long data line one end at first, and the other end is connected to own computer interface, and such debugging mode has very big inconvenience, and first is the data line drags away, is stained with greasy dirt dust easily, long-term the use, leads to the data line very dirty.
Secondly, due to frequent plugging and unplugging of the data lines, if a notebook computer is used for debugging 100 automobiles, the interface of the computer needs to be plugged and unplugged for at least 100 times, and the phenomenon that the data interface of the computer is not well contacted or even damaged is easily caused by long-term plugging and unplugging, so that some rare and wonderful faults are caused, and misjudgment is caused for debugging.
The overlong data line is easily interfered by an external electromagnetic field, so that the error rate of data transmission is increased, debugging failure is often easily caused, and meanwhile, the overlong data line easily causes damage to a computer data interface due to overlarge weight.
In view of the above problems, how to connect the automobile device and the tool device such as a mobile phone, an iPAD, and a notebook computer in a wireless manner is achieved, so that many disadvantages of wired connection are avoided, convenience is improved, and the service life of the automobile interface is prolonged, which becomes a problem to be solved.
Disclosure of Invention
The invention aims to provide a portable Bluetooth 485 conversion box for automobile debugging, which realizes the wireless connection of automobile equipment and tool equipment, avoids the defects of wired transmission connection, improves the convenience and prolongs the service life of an automobile interface.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a portable Bluetooth 485 conversion box for automobile debugging, which comprises automobile equipment and debugging tool equipment, wherein an RS485 interface is arranged on the automobile equipment, a debugging conversion box is inserted into the RS485 interface on the automobile equipment, and the debugging tool equipment performs information transmission with the debugging conversion box in a wireless transmission mode.
A level conversion circuit is arranged in the debugging conversion box: one end of the level conversion circuit is connected with the UART _ TXD through an electric signal; the level conversion circuit is provided with a resistor R7 connected with the UART _ TXD, one end of a resistor R7 is connected with a triode Q1, and a resistor R7 is connected with a base set of the triode; a resistor R5 is connected between the resistor R7 and the UART _ TXD in a branching mode, the resistor R5 is connected with the collector of the triode Q1 through the resistor R3, and the emitter of the triode Q1 is grounded; the level conversion circuit comprises an RS485 chip, and the receiving and transmitting control end of the RS485 chip is connected with the collector of the triode Q1.
As a preferable technical scheme of the invention, the resistor R5 and the resistor R3 are connected with +3.6V voltage in common.
As a preferred technical scheme of the invention, an RO pin of an RS485 chip is connected with a UART _ TXD signal input line, the RO pin of the RS485 chip is connected with +3.6V voltage through a resistor R1, and a DI pin of the RS485 chip is grounded.
As a preferable technical scheme of the invention, a VCC pin interface of the RS485 chip is connected with a parallel circuit of a power supply E1 and a capacitor C1, and one end of the parallel circuit of the power supply E1 and the capacitor C1 is grounded. The pin A of the RS485 chip is connected with a resistor RA, the branch of the circuit between the pin A of the resistor RA and the pin A of the RS485 chip is connected with a resistor R2, the resistor R2 is connected with the other end of a parallel circuit of a power supply E1 and a capacitor C1, and the parallel circuit of the power supply E1 and the capacitor C1 and the resistor R2 are jointly connected with +3.6V voltage.
As a preferred technical scheme of the invention, a pin B of the RS485 chip is connected with a resistor RB, a GND pin of the RS485 chip is grounded, a grounding circuit of the GND pin of the RS485 chip is connected with a branch resistor R6, and the other end of the branch resistor R6 is connected with a circuit between the resistor RB and the pin B of the RS485 chip.
As a preferred technical scheme of the invention, a first Bluetooth module is included in the debugging conversion box; the debugging tool equipment comprises a second Bluetooth module; the debugging tool equipment carries out information transmission through second bluetooth module, first bluetooth module and debugging conversion box.
As a preferred technical scheme of the invention, a built-in charging power supply is arranged in the debugging conversion box, and the built-in charging power supply adopts a polymer lithium battery.
As a preferable technical scheme of the invention, a charging interface electrically connected with a built-in charging power supply is arranged on the side of the debugging conversion box.
As a preferable technical scheme of the invention, a Micro USB socket and a Type-C, Lightning interface are simultaneously arranged at the charging interface position on the side of the debugging conversion box.
The invention has the following beneficial effects:
1. the triode adopted in the level switching circuit in the debugging switching box controls the automatic switching of the receiving and sending control levels, and replaces a singlechip with higher cost for receiving and sending control data;
2. the data information of the debugging tool equipment is transmitted to the debugging conversion box in a wireless mode, and the received data is converted into RS485 level for signal transmission; the debugging conversion box is directly inserted into the RS485 interface of the debugged automobile equipment, so that data transmission can be carried out, and inconvenience caused by data line connection is avoided.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a level shift circuit in a debug shift box according to the present invention;
FIG. 2 is a truth table of level operation signals in the present invention;
FIG. 3 is a truth table of level operation signals in the present invention;
FIG. 4 is a schematic diagram of a debugging tool device and a debugging transition box installed on an automobile device according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-automotive equipment; 2-RS485 interface; 3-debugging the conversion box; 4-a first bluetooth module; 5-built-in charging power supply; 6-a charging interface; 7-commissioning tool equipment; 8-a second Bluetooth module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, 2, 3 and 4, the present invention relates to a portable bluetooth 485 conversion box for debugging automobiles.
Be provided with RS485 interface 2 on the automotive equipment 1, it has debugging conversion box 3 to peg graft on the RS485 interface 2 on the automotive equipment 1, including first bluetooth module 4 in the debugging conversion box 3.
The debugging tool device 7 performs information transmission with the debugging conversion box 3 through a wireless transmission mode. Specifically, the method comprises the following steps: the debugging tool equipment 7 is internally provided with a second Bluetooth module 8, and the debugging tool equipment 7 carries out information transmission with the debugging conversion box 3 through the second Bluetooth module 8, the first Bluetooth module 4.
Be provided with built-in charging source 5 in the debugging conversion box 3, built-in charging source 5 adopts the polymer lithium cell, and the avris of debugging conversion box 3 is provided with the interface 6 that charges of being connected with built-in charging source 5 electricity, and the interface 6 position department that charges of debugging conversion box 3 avris is equipped with Micro USB socket, Type-C, Lightning interface simultaneously.
A level conversion circuit is arranged in the debugging conversion box 3: one end of the level conversion circuit is connected with the UART _ TXD through an electric signal; the level conversion circuit is provided with a resistor R7 connected with the UART _ TXD, one end of a resistor R7 is connected with a triode Q1, and a resistor R7 is connected with a base set of the triode; a resistor R5 is connected between the resistor R7 and the UART _ TXD in a branching mode, the resistor R5 is connected with the collector of the triode Q1 through the resistor R3, the resistor R5 and the resistor R3 are connected with +3.6V voltage in a common mode, and the emitter of the triode Q1 is grounded.
The level conversion circuit comprises an RS485 chip, a receiving and transmitting control end of the RS485 chip is connected with a collector electrode of a triode Q1, an RO pin of the RS485 chip is connected with a UART _ TXD signal input line, the RO pin of the RS485 chip is connected with +3.6V voltage through a resistor R1, and a DI pin of the RS485 chip is grounded; a VCC pin interface of the RS485 chip is connected with a parallel circuit of a power supply E1 and a capacitor C1, and one end of the parallel circuit of the power supply E1 and the capacitor C1 is grounded; a pin A of the RS485 chip is connected with a resistor RA, an upper branch of a circuit between the resistor RA and the pin A of the RS485 chip is connected with a resistor R2, a resistor R2 is connected with the other end of a parallel circuit of a power supply E1 and a capacitor C1, and the parallel circuit of the power supply E1 and the capacitor C1 and a resistor R2 are jointly connected with +3.6V voltage; the B pin of the RS485 chip is connected with a resistor RB, the GND pin of the RS485 chip is grounded, a GND pin grounding circuit of the RS485 chip is connected with a branch resistor R6, and the other end of the branch resistor R6 is connected with a circuit between the resistor RB and the B pin of the RS485 chip.
Example two
Referring to fig. 1, 2 and 3, the level of the RE and DE of the RS485 transceiver control end of the present invention needs to control the receiving and sending of data by a single chip according to the conventional design according to the level of the data receiving and sending controller, and the control mode adopted by the present invention uses a triode to control the automatic conversion of the receiving and sending control levels.
The level of RE and DE of RS485 control end needs a single chip to control the receiving and sending of data according to the height of the controller for receiving and sending data, and the control mode of the invention uses a triode to control the automatic conversion of the receiving and sending control level.
The default state of the invention is the receiving state.
RE and DE of U1 in FIG. 1 are both pulled up to +3.6V by R1 and are high, the RO terminal is high according to the truth table, the DI state is determined by the A and B states, A is high, B is low, DI is high, and A is low, B is high, DI is low.
When the invention is in a state of sending data to the automobile instrument:
at this time, if the UART _ TXD is at a high level, the collector of the transistor Q1 is at a low level, and according to the truth table, the A, B terminals of the U1 are all at a high impedance, and since the resistor R2 is pulled up to +3.6V, the 485A outputs a high level at this time, and the R6 is pulled down, so the 485B outputs a low level;
if the UART _ TXD is low, the base of the transistor Q1 is low, and the collector is high, so DE and RE of U1 are both high, and according to the truth table, RO of U1 is high, the states of a and B and DI of U1 change, i.e., DI is high, 485A output is high, 485B output is low, DI is low, 485A output is low, 485B output is high, and the RS485 logic output requirement is met.
EXAMPLE III
The invention adopts a polymer lithium battery with a built-in 2000mha as a power supply, has small volume, large capacity and high safety, has the volume of 70 x 55 x 35mm, is convenient to carry, can be charged by a common mobile phone charger [ a Micro USB socket and a Type-C, Lightning interface ], has a charging interface compatible with a universal mobile phone charging plug, can be continuously used for 8 hours after being fully charged at one time, and is very convenient and practical.
The invention mainly relates to an interface conversion circuit which adopts a transparent transmission mode, has no protocol limitation, and has strong universality and wide application range.
The wireless transparent transmission debugging device has the innovation points that the wireless transparent transmission debugging device is provided with a battery, is small in size, adopts a wireless transparent transmission mode to perform data transmission, can be an android mobile phone, an apple mobile phone or an iPAD, is convenient to carry and high in universality, and has the charging interface completely the same as a universal mobile phone charger.
The invention is connected with the mobile phone or the ipad in an uplink way by a Bluetooth mode, has address and password protection, and has strong safety and confidentiality.
In the description herein, references to the terms "embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a bluetooth 485 conversion box for portable car debugging, includes automotive equipment (1) and debugging tool equipment (7), be provided with RS485 interface (2) on automotive equipment (1), it has debugging conversion box (3), its characterized in that to peg graft on RS485 interface (2) on automotive equipment (1):
the debugging tool equipment (7) performs information transmission with the debugging conversion box (3) in a wireless transmission mode;
a level conversion circuit is arranged in the debugging conversion box (3):
one end of the level conversion circuit is connected with the UART _ TXD through an electric signal; the level conversion circuit is provided with a resistor R7 connected with the UART _ TXD, one end of a resistor R7 is connected with a triode Q1, and a resistor R7 is connected with a base set of the triode; a resistor R5 is connected between the resistor R7 and the UART _ TXD in a branching mode, the resistor R5 is connected with the collector of the triode Q1 through the resistor R3, and the emitter of the triode Q1 is grounded;
the level conversion circuit comprises an RS485 chip, and the receiving and transmitting control end of the RS485 chip is connected with the collector of the triode Q1.
2. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
the resistor R5 and the resistor R3 are connected with +3.6V voltage in common.
3. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
the RO pin of the RS485 chip is connected with a UART _ TXD signal input line, the RO pin of the RS485 chip is connected with +3.6V voltage through a resistor R1, and the DI pin of the RS485 chip is grounded.
4. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
a VCC pin interface of the RS485 chip is connected with a parallel circuit of a power supply E1 and a capacitor C1, and one end of the parallel circuit of the power supply E1 and the capacitor C1 is grounded;
the pin A of the RS485 chip is connected with a resistor RA, the branch of the circuit between the pin A of the resistor RA and the pin A of the RS485 chip is connected with a resistor R2, the resistor R2 is connected with the other end of a parallel circuit of a power supply E1 and a capacitor C1, and the parallel circuit of the power supply E1 and the capacitor C1 and the resistor R2 are jointly connected with +3.6V voltage.
5. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
the B pin of the RS485 chip is connected with a resistor RB, the GND pin of the RS485 chip is grounded, a GND pin grounding circuit of the RS485 chip is connected with a branch resistor R6, and the other end of the branch resistor R6 is connected with a circuit between the resistor RB and the B pin of the RS485 chip.
6. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
the debugging conversion box (3) comprises a first Bluetooth module (4);
the debugging tool equipment (7) comprises a second Bluetooth module (8);
the debugging tool equipment (7) is in information transmission with the debugging conversion box (3) through the second Bluetooth module (8) and the first Bluetooth module (4).
7. The portable Bluetooth 485 conversion box for debugging automobiles according to claim 1, wherein:
a built-in charging power supply (5) is arranged in the debugging conversion box (3), and the built-in charging power supply (5) adopts a polymer lithium battery.
8. The bluetooth 485 converter box for debugging portable automobiles of claim 7, wherein:
and a charging interface (6) electrically connected with a built-in charging power supply (5) is arranged on the side of the debugging conversion box (3).
9. The bluetooth 485 converter box for debugging portable automobiles of claim 8, wherein:
the position of the charging interface (6) on the side of the debugging conversion box (3) is provided with a Micro USB socket and a Type-C, Lightning interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011484493.2A CN112712684A (en) | 2020-12-16 | 2020-12-16 | Portable bluetooth 485 conversion boxes for automobile debugging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011484493.2A CN112712684A (en) | 2020-12-16 | 2020-12-16 | Portable bluetooth 485 conversion boxes for automobile debugging |
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| CN202011484493.2A Pending CN112712684A (en) | 2020-12-16 | 2020-12-16 | Portable bluetooth 485 conversion boxes for automobile debugging |
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Application publication date: 20210427 |