CN210895121U - Automobile diagnosis equipment and system - Google Patents
Automobile diagnosis equipment and system Download PDFInfo
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- CN210895121U CN210895121U CN201921805278.0U CN201921805278U CN210895121U CN 210895121 U CN210895121 U CN 210895121U CN 201921805278 U CN201921805278 U CN 201921805278U CN 210895121 U CN210895121 U CN 210895121U
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Abstract
The embodiment of the utility model provides an automobile diagnosis equipment and system is provided to automobile diagnosis technical field. Wherein, the automobile diagnosis device includes: the diagnostic protocol transceiver is used for acquiring fault code data of the automobile to be diagnosed; a communication module; the main controller is respectively and electrically connected with the diagnostic protocol transceiver and the communication module and is used for sending fault code data to the upper computer through the communication module; the universal meter circuit is electrically connected with the main controller and used for sending universal meter data to the main controller so that the main controller can forward the universal meter data to an upper computer through the communication module; the oscilloscope circuit is electrically connected with the communication module and is used for sending oscilloscope data to the upper computer through the communication module; and the signal generating circuit is electrically connected with the main controller and used for responding to a driving signal of the main controller and generating an analog waveform signal. The embodiment of the utility model provides an adaptability of automobile diagnosis equipment has been promoted.
Description
[ technical field ] A method for producing a semiconductor device
The embodiment of the utility model provides a relate to automobile diagnosis technical field, especially relate to an automobile diagnosis equipment and system.
[ background of the invention ]
When a certain circuit in the automobile electric control system has a fault, fault information of the certain circuit is stored in the automobile electric control system in the form of fault codes.
At present, an automobile diagnosis device is adopted to read a fault code and send the fault code to an upper computer for visual display so as to realize fault diagnosis. However, for some circuit faults, the specific fault cause represented by the fault code can be accurately determined by measuring the voltage, the current and the signal waveform of the circuit, and in the circuit fault scene, the conventional automobile diagnosis equipment cannot realize fault diagnosis and has poor adaptability.
[ Utility model ] content
The embodiment of the utility model provides a aim at providing an automobile diagnosis equipment and system, its adaptability that can promote automobile diagnosis equipment.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solution:
in a first aspect, an embodiment of the present invention provides an automotive diagnostic apparatus, including:
the diagnostic protocol transceiver is used for acquiring fault code data of the automobile to be diagnosed;
a communication module;
the main controller is respectively electrically connected with the diagnostic protocol transceiver and the communication module and is used for sending the fault code data to an upper computer through the communication module;
the universal meter circuit is electrically connected with the main controller and used for sending universal meter data to the main controller so that the main controller can forward the universal meter data to the upper computer through the communication module;
the oscilloscope circuit is electrically connected with the communication module and used for sending oscilloscope data to the upper computer through the communication module; and
and the signal generating circuit is electrically connected with the main controller and used for responding to the driving signal of the main controller and generating an analog waveform signal.
Optionally, the multimeter circuit comprises:
the first meter pen is used for grounding;
a second meter pen;
the channel selection circuit is respectively electrically connected with the second meter pen and the main controller and is used for switching to a corresponding test channel for testing according to a channel selection instruction sent by the main controller and generating a test signal; and
and the universal pen chip is respectively electrically connected with the channel selection circuit and the main controller and is used for sending the universal meter data to the main controller according to the test signal.
Optionally, the multimeter circuit further includes a high-voltage protection circuit, and the high-voltage protection circuit is electrically connected between the channel selection circuit and the second meter pen, and is configured to perform high-voltage protection processing on an analog signal transmitted by the second meter pen.
Optionally, the oscilloscope circuitry comprises:
the detection channel circuits are used for detecting and processing analog signals;
the first switch circuit comprises a plurality of analog switches, and each analog switch is electrically connected with the corresponding detection channel circuit;
the analog-to-digital conversion circuit is respectively electrically connected with each analog switch, when a target analog switch works in a conducting state, a processed analog signal is input into the analog-to-digital conversion circuit through the target analog switch, and the analog-to-digital conversion circuit converts the processed analog signal into a digital signal; and
and the slave controller is respectively electrically connected with the communication module and the analog-to-digital conversion circuit and is used for obtaining oscilloscope data according to the digital signals and sending the oscilloscope data to the upper computer through the communication module.
Optionally, the detection channel circuit comprises:
the signal conditioning circuit is used for detecting the analog signal and conditioning the analog signal; and
and the differentiator is electrically connected with the signal conditioning circuit and the corresponding analog switch and used for processing the analog signal after signal conditioning to obtain a differential signal.
Optionally, the detection channel circuit further includes a second switch circuit electrically connected between the signal conditioning circuit and the differentiator, and the second switch circuit is further electrically connected to the diagnostic protocol transceiver, and when the second switch circuit is controlled by the diagnostic protocol transceiver to operate in the first switch state, the analog signal conditioned by the signal is transmitted to the differentiator through the second switch circuit; when the second switch circuit is controlled by the diagnostic protocol transceiver to work in a second switch state, the communication waveform signal corresponding to the fault code data sent by the diagnostic protocol transceiver is transmitted to the differentiator through the second switch circuit.
Optionally, the signal conditioning circuit comprises:
a probe for detecting an analog signal;
the signal attenuation circuit is electrically connected with the probe and is used for attenuating the analog signal; and
and the operational amplifier is electrically connected with the signal attenuation circuit and is used for amplifying the analog signal after attenuation processing.
Optionally, the slave controller comprises:
the FPGA chip is electrically connected with the analog-to-digital conversion circuit and used for obtaining oscilloscope communication data according to the digital signal; and
and the data conversion unit is electrically connected with the FPGA chip and the communication module, and is used for converting the oscilloscope communication data into oscilloscope data and sending the oscilloscope data to the upper computer through the communication module.
Optionally, the signal generating circuit comprises:
the signal amplification circuit is electrically connected with the main controller and is used for amplifying the driving signal sent by the main controller to obtain an analog waveform signal;
the first terminal is electrically connected with the signal amplification circuit and is used for transmitting the analog waveform signal; and
and the second terminal is used for grounding.
Optionally, the communication module comprises:
the communication interface circuits are used for communicating with the upper computer;
the signal conversion unit is respectively electrically connected with the master controller and the slave controller and is used for converting data sent by the master controller or the slave controller into communication data of a corresponding communication interface circuit; and
and the communication chip is respectively electrically connected with the signal conversion unit and each communication interface circuit and is used for sending communication signals, selecting a target interface circuit according to the communication signals and sending data sent by the main controller or the oscilloscope circuit to the upper computer through the target interface circuit.
Optionally, the plurality of communication interface circuits include a USB interface circuit, a WIFI interface circuit, and a bluetooth interface circuit.
Optionally, the signal conversion unit includes:
the USB concentrator is respectively and electrically connected with the main controller and the oscilloscope circuit and is used for forwarding data sent by the main controller or the oscilloscope circuit;
the USB selector switch is respectively electrically connected with the USB concentrator, the communication chip and the USB interface circuit, and when the communication signal controls the USB selector switch to work in a third switch state, data forwarded by the USB concentrator is transmitted to the communication chip through the USB selector switch; when the communication signal controls the USB selector switch to work in a fourth switch state, the data forwarded by the USB concentrator is transmitted to the USB interface circuit through the USB selector switch.
In a second aspect, the present invention provides an automotive diagnostic system, including:
the automotive diagnostic apparatus as set forth in any one of the above; and
and the upper computer is in communication connection with the automobile diagnosis equipment and is used for displaying the diagnosis data sent by the automobile diagnosis equipment.
The utility model has the advantages that: compared with the prior art, the embodiment of the utility model provides an automobile diagnosis equipment and system. Send universal meter data to main control unit through the universal meter circuit to make main control unit forward universal meter data to the host computer through communication module, oscilloscope circuit passes through communication module, sends oscilloscope data to the host computer, and signal generation circuit responds main control unit's drive signal, produces analog waveform signal, therefore, the embodiment of the utility model provides an automobile diagnosis equipment passes through integrated universal meter circuit, oscilloscope circuit and signal generation circuit, has avoided only utilizing the specific fault cause problem that fault code data can't be confirmed accurately, has promoted automobile diagnosis equipment's adaptability.
[ description of the drawings ]
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of an automobile diagnostic system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an automotive diagnostic apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a multimeter circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an oscilloscope circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a detection channel circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a slave controller according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a signal generating circuit according to an embodiment of the present invention.
[ detailed description ] embodiments
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Please refer to fig. 1, which is a schematic structural diagram of an automobile diagnostic system according to an embodiment of the present invention. As shown in fig. 1, the vehicle diagnostic system 300 includes a vehicle diagnostic apparatus 100 and an upper computer 200 communicatively connected to the vehicle diagnostic apparatus 100. The automobile diagnosis device 100 is connected to an automobile to be diagnosed (not shown), and is configured to acquire diagnosis data of the automobile to be diagnosed and send the diagnosis data to the upper computer 200, and the upper computer 200 is configured to display the diagnosis data sent by the automobile diagnosis device 100.
The embodiment of the utility model provides a vehicle diagnostic system, through adopting the disclosed vehicle diagnostic equipment of following arbitrary equipment embodiment, avoided only utilizing the specific fault reason problem that fault code data can't be accurately confirmed, promoted vehicle diagnostic system's adaptability. For technical details which are not described in detail in this example, reference is made to the following apparatus example.
Please refer to fig. 2, which is a schematic structural diagram of an automotive diagnostic apparatus according to an embodiment of the present invention. As shown in fig. 2, the automotive diagnostic apparatus 100 includes a diagnostic protocol transceiver 10, a communication module 20, a main controller 30, a multimeter circuit 40, an oscilloscope circuit 50, and a signal generation circuit 60.
The diagnostic protocol transceiver 10 is used for acquiring fault code data of the automobile to be diagnosed.
The diagnostic protocol transceiver 10 includes a diagnostic interface and a serial peripheral interface (not shown), the diagnostic interface is configured to receive fault code data stored in an automobile electronic control system of an automobile to be detected, and the diagnostic protocol transceiver 10 is further configured to detect a communication protocol based on the fault code data and send the fault code data of a specific communication protocol to the main controller 30 through the serial peripheral interface.
In some embodiments, the diagnostic protocol transceiver 10 further includes a protocol Controller, the protocol Controller is connected to the main Controller 30, the protocol Controller may employ, for example, an integrated circuit MCP2515, the integrated circuit MCP2515 is a Controller Area Network (CAN) Controller, and supports the CAN V2.0B specification, so as to filter out unnecessary data packets and reduce the overhead of the main Controller 30.
Referring to fig. 3 and fig. 5, the communication module 20 includes a plurality of communication interface circuits 21, a signal conversion unit 22, and a communication chip 23.
The communication interface circuit 21 is used for communicating with the upper computer 200.
In this embodiment, the plurality of communication interface circuits 21 include a USB interface circuit 211, a WIFI interface circuit 212, and a bluetooth interface circuit 213.
The signal conversion unit 22 is electrically connected to the master controller 30 and the slave controller 54, respectively, and is configured to convert data sent by the master controller 30 or the slave controller 54 into communication data of a corresponding communication interface circuit.
The signal conversion unit 22 includes a USB hub 221 and a USB switch 222.
The USB hub 221 is electrically connected to the main controller 30 and the oscilloscope circuit 50, and is configured to forward data sent by the main controller 30 or the oscilloscope circuit 50.
In this embodiment, the fault code data and/or multimeter data sent by the main controller 30 and the oscilloscope data sent by the slave controller 54 are USB type data.
The USB switch 222 is electrically connected to the USB hub 221, the communication chip 23, and the USB interface circuit 211, respectively, and when the communication signal controls the USB switch 222 to operate in a third switch state, the data forwarded by the USB hub 221 is transmitted to the communication chip 23 through the USB switch 222; when the communication signal controls the USB switch 222 to operate in the fourth switch state, the data forwarded by the USB hub 221 is transmitted to the USB interface circuit 211 through the USB switch 222.
It can be understood that when the communication signal controls the USB switch 222 to operate in the third switch state, according to the control instruction of the communication chip 23, the WIFI interface circuit 212 or the bluetooth interface circuit 213 is gated, and the data forwarded by the USB hub 221 is transmitted to the upper computer 200.
The communication chip 23 is electrically connected to the signal conversion unit 22 and each communication interface circuit 21, and is configured to send a communication signal, select a target interface circuit according to the communication signal, and send data sent by the main controller 30 or the oscilloscope circuit 50 to the upper computer 200 through the target interface circuit.
In this embodiment, the communication chip 23 includes a radio frequency controller, a DDR random access memory, and an SPI flash memory, and the radio frequency controller is connected to the DDR random access memory, the SPI flash memory, the USB switch 222, the WIFI interface circuit 212, and the bluetooth interface circuit 213, respectively.
Specifically, the target interface circuit refers to one of a USB interface circuit 211, a WIFI interface circuit 212, or a bluetooth interface circuit 213, and the communication chip 23 forwards the diagnostic data to the upper computer 200 through the target interface circuit for display, so that the upper computer 200 supports at least three communication transmission modes, i.e., USB, WIFI, and bluetooth.
When the automobile diagnostic device 100 is powered on again, the target interface circuit is consistent with the target interface circuit of the last power on, if the target interface circuit needs to be replaced, the communication chip 23 updates the communication signal according to the selection instruction of the upper computer 200, the communication signal is sent to the USB switch 222, the WIFI interface circuit 212 or the bluetooth interface circuit 213, and the USB switch 222, the WIFI interface circuit 212 or the bluetooth interface circuit 213 is selected as a new target interface circuit.
The main controller 30 is electrically connected to the diagnostic protocol transceiver 10 and the communication module 20, and is configured to send the fault code data to the host computer 200 through the communication module 20.
In this embodiment, the main controller 30 includes a single chip microcomputer and peripheral circuits thereof, and the single chip microcomputer may adopt 51 series, Arduino series, STM32 series, and the like.
In some embodiments, the master controller 30 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), ARM (AcornRISC computer chip) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components; but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine; or as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The multimeter circuit 40 with the main control unit 30 electricity is connected for send multimeter data extremely main control unit 30, so that main control unit 30 passes through communication module 20 forwards multimeter data extremely host computer 200.
Referring to FIG. 4, the multimeter circuit 40 includes a first stylus 401, a second stylus 402, a high voltage protection circuit 405, a channel selection circuit 403, and a universal pen chip 404.
The first stylus 401 is used for grounding.
The first meter pen 401 is a negative meter pen of the multimeter circuit 40, the second meter pen 402 is a positive meter pen of the multimeter circuit 40, the test end of the first meter pen 401 and the test end of the second meter pen 402 simultaneously act on a circuit to be tested, a closed loop is formed between the first meter pen 401, the second meter pen 402 and the circuit to be tested, and a current signal flows into the second meter pen 402 from the first meter pen 401 inside the automobile diagnosis device 100.
The high voltage protection circuit 405 is electrically connected between the channel selection circuit 403 and the second stylus 402, and is configured to perform high voltage protection processing on the analog signal transmitted by the second stylus 402.
In some embodiments, the high voltage protection circuit 405 may be omitted.
The channel selection circuit 403 is electrically connected to the second stylus 402 and the main controller 30, and is configured to switch to a corresponding test channel for testing according to a channel selection instruction sent by the main controller 30, and generate a test signal.
In this embodiment, the testing channel of the multimeter circuit 40 includes a resistance testing channel, an alternating current testing channel, an alternating voltage testing channel, a direct current testing channel, a direct voltage testing channel, a capacitance testing channel, a diode testing channel, a triode testing channel, a buzzer testing channel, etc., and the corresponding testing signal includes a resistance signal, an alternating current signal, an alternating voltage signal, a direct current signal, a direct voltage signal, a capacitance signal, a diode voltage drop signal, a triode voltage drop signal, a buzzer signal, etc. For example, when the channel selection circuit 403 switches to a dc voltage test channel for testing according to a channel selection instruction sent by the main controller 30, the connection terminal of the first stylus 401 is controlled to be switched to be connected to a "COM" terminal, and the connection terminal of the second stylus 402 is controlled to be switched to be connected to a "V Ω" terminal.
The universal pen chip 404 is electrically connected to the channel selection circuit 403 and the main controller 30, and is configured to send the universal meter data to the main controller 30 according to the test signal.
The universal pen chip 404 sends the multimeter data to the main controller 30 through a serial peripheral interface, that is, the multimeter data is serial data.
The oscilloscope circuit 50 is electrically connected to the communication module 20, and is configured to send oscilloscope data to the upper computer 200 through the communication module 20.
Referring to fig. 5 again, the oscilloscope circuit 50 includes a plurality of detection channel circuits 51, a first switch circuit 52, an analog-to-digital conversion circuit 53 and a slave controller 54.
Each of the detection channel circuits 51 is used for detecting and processing analog signals.
It can be understood that the oscilloscope data is a wave curve signal, and signal parameters such as voltage, current, frequency, phase difference, amplitude modulation and the like of the analog signal can be measured according to the wave curve signal.
Referring to fig. 6, the detection channel circuit 51 includes a signal conditioning circuit 511 and a differentiator 512.
The signal conditioning circuit 511 is configured to detect the analog signal and perform signal conditioning processing on the analog signal.
Further, the signal conditioning circuit 511 includes a probe 5111, a signal attenuation circuit 5112, and an operational amplifier 5113.
Wherein the probe 5111 is used for detecting an analog signal. The signal attenuation circuit 5112 is electrically connected to the probe 5111, and is used for performing attenuation processing on the analog signal. The operational amplifier 5113 is electrically connected to the signal attenuation circuit 5112, and is configured to amplify the analog signal after being attenuated.
The differentiator 512 is electrically connected to the signal conditioning circuit 511 and a corresponding analog switch 520, and is configured to process the analog signal after signal conditioning to obtain a differential signal.
In some embodiments, the detection channel circuit 51 further comprises a second switch circuit 513.
The second switch circuit 513 is electrically connected between the signal conditioning circuit 511 and the differentiator 512, and the second switch circuit 513 is further electrically connected to the diagnostic protocol transceiver 10, when the second switch circuit 513 is controlled by the diagnostic protocol transceiver 10 to operate in a first switch state, the signal-conditioned analog signal is transmitted to the differentiator 512 through the second switch circuit 513; when the second switch circuit 513 is controlled by the diagnostic protocol transceiver 10 to operate in the second switch state, the communication waveform signal corresponding to the fault code data sent from the diagnostic protocol transceiver 10 is transmitted to the differentiator 512 through the second switch circuit 513.
In summary, the communication waveform signal corresponding to the fault code data is converted into oscilloscope data through the second switch circuit 513, and is displayed on the upper computer 200 in the form of a waveform curve signal, so that the display is more visual, and data comparison with the multimeter data and the oscilloscope data corresponding to the detection channel circuit 51 for detecting and processing the analog signal is facilitated.
The first switch circuit 52 includes a plurality of analog switches 520, and each of the analog switches 520 is electrically connected to a corresponding one of the detection channel circuits 51.
The analog-to-digital conversion circuit 53 is electrically connected to each of the analog switches 520, and when a target analog switch is in an on state, a processed analog signal is input to the analog-to-digital conversion circuit 53 through the target analog switch, and the analog-to-digital conversion circuit 53 converts the processed analog signal into a digital signal.
The slave controller 54 is electrically connected to the communication module 20 and the analog-to-digital conversion circuit 53, and configured to obtain oscilloscope data according to the digital signal, and send the oscilloscope data to the upper computer 200 through the communication module 20.
Referring to fig. 7, the slave controller 54 includes an FPGA chip 541 and a data conversion unit 542.
The FPGA chip 541 is electrically connected to the analog-to-digital conversion circuit 53, and is configured to obtain oscilloscope communication data according to the digital signal. The data conversion unit 542 is electrically connected to the FPGA chip 541 and the communication module 20, and is configured to convert the oscilloscope communication data into oscilloscope data, and send the oscilloscope data to the upper computer 200 through the communication module 20.
In this embodiment, the working state of the analog switch 520 is controlled by the FPGA chip 541, and a corresponding path of analog signal processed by the detection channel circuit 51 can be selectively output to the analog-to-digital conversion circuit 53. The oscilloscope communication data are parallel data and are transmitted to the data conversion unit 542 through a parallel interface of the FPGA chip 541, the data conversion unit 542 converts the oscilloscope communication data into oscilloscope data, the oscilloscope data are USB type data, and the oscilloscope data are sent to the USB hub 221 through a USB interface of the data conversion unit 542.
The signal generating circuit 60 is electrically connected to the main controller 30, and generates an analog waveform signal in response to a driving signal of the main controller 30.
Referring to fig. 8, the signal generating circuit 60 includes a signal amplifying circuit 601, a first terminal 602, and a second terminal 603.
The signal amplifying circuit 601 is electrically connected to the main controller 30, and is configured to amplify the driving signal sent by the main controller 30 to obtain an analog waveform signal. The first terminal 602 is electrically connected to the signal amplification circuit 601, and is configured to transmit the analog waveform signal. The second terminal 603 is used for grounding.
It can be understood that the signal generating circuit 60 is connected to the circuit to be tested, and the analog waveform signal amplified by the signal amplifying circuit 601 acts on the circuit to trigger the target chip of the circuit to be tested to operate, so as to implement fault detection under the condition that the fault cause can be accurately determined only when the target chip of the circuit to be tested operates.
It should be noted that the diagnostic protocol transceiver 10, the communication module 20, the main controller 30, the multimeter circuit 40, the oscilloscope circuit 50, and the signal generating circuit 60 are all installed in the automobile diagnostic device 100, that is, the automobile diagnostic device 100 has a fault code detection function, a multimeter function, an oscilloscope function, and a signal generating function, and is wider in application range based on the fault code detection function, the multimeter function, the oscilloscope function, and the signal generating function.
In some embodiments, the automotive diagnostic apparatus 100 further includes a power module, a key module, and an input communication module (not shown).
The power module is connected with the main controller 30 and used for providing power voltage for the main controller 30, wherein the power module comprises a battery and a power management circuit, the battery is connected with the main controller 30, and the power management circuit is respectively connected with the battery and the main controller 30.
The key module is connected with the main controller 30, and is configured to generate an operation instruction according to the user operation, and send the operation instruction to the main controller 30, so that the main controller 30 executes a corresponding operation according to the operation instruction. Wherein the operation instruction comprises an acquisition instruction, a diagnosis mode instruction and the like. For example, when the operation instruction is an acquisition instruction, the main controller 30 controls the diagnostic protocol transceiver 10 to acquire the fault code data of the car to be diagnosed.
The input communication module is connected with the diagnostic protocol transceiver 10, the main controller 30 and the communication chip 23 and used for receiving diagnostic data uploaded by automobile maintenance personnel, under the action of the main controller 30, the diagnostic data are forwarded to the communication chip 23 and sent to the upper computer 200 through a target communication interface circuit. The input communication module comprises an input communication interface and an input concentrator, the input communication interface is used for receiving diagnosis data uploaded by automobile maintenance personnel, and the input concentrator is respectively connected with the input communication interface, the main controller 30 and the communication chip 23 and used for forwarding the diagnosis data to the communication chip 23 and sending the diagnosis data to the upper computer 200 through a target communication interface circuit.
The embodiment of the utility model provides an automobile diagnosis equipment sends universal meter data to main control unit through the universal meter circuit to make main control unit pass through communication module and forward universal meter data to the host computer, the oscilloscope circuit passes through communication module, sends oscilloscope data to the host computer, and the drive signal of signal generation circuit response main control unit produces the analog waveform signal, therefore, the utility model provides an automobile diagnosis equipment passes through integrated universal meter circuit, oscilloscope circuit and signal generation circuit, has avoided only utilizing the concrete fault cause problem that fault code data can't be confirmed accurately, has promoted automobile diagnosis equipment's adaptability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (13)
1. An automotive diagnostic apparatus, characterized by comprising:
the diagnostic protocol transceiver is used for acquiring fault code data of the automobile to be diagnosed;
a communication module;
the main controller is respectively electrically connected with the diagnostic protocol transceiver and the communication module and is used for sending the fault code data to an upper computer through the communication module;
the universal meter circuit is electrically connected with the main controller and used for sending universal meter data to the main controller so that the main controller can forward the universal meter data to the upper computer through the communication module;
the oscilloscope circuit is electrically connected with the communication module and used for sending oscilloscope data to the upper computer through the communication module; and
and the signal generating circuit is electrically connected with the main controller and used for responding to the driving signal of the main controller and generating an analog waveform signal.
2. The automotive diagnostic apparatus of claim 1, wherein the multimeter circuit comprises:
the first meter pen is used for grounding;
a second meter pen;
the channel selection circuit is respectively electrically connected with the second meter pen and the main controller and is used for switching to a corresponding test channel for testing according to a channel selection instruction sent by the main controller and generating a test signal; and
and the universal pen chip is respectively electrically connected with the channel selection circuit and the main controller and is used for sending the universal meter data to the main controller according to the test signal.
3. The automotive diagnostic apparatus of claim 2, wherein the multimeter circuit further comprises a high voltage protection circuit electrically connected between the channel selection circuit and the second stylus for high voltage protection of the analog signal transmitted by the second stylus.
4. The automotive diagnostic apparatus of claim 1, wherein the oscilloscope circuit comprises:
the detection channel circuits are used for detecting and processing analog signals;
the first switch circuit comprises a plurality of analog switches, and each analog switch is electrically connected with the corresponding detection channel circuit;
the analog-to-digital conversion circuit is respectively electrically connected with each analog switch, when a target analog switch works in a conducting state, a processed analog signal is input into the analog-to-digital conversion circuit through the target analog switch, and the analog-to-digital conversion circuit converts the processed analog signal into a digital signal; and
and the slave controller is respectively electrically connected with the communication module and the analog-to-digital conversion circuit and is used for obtaining oscilloscope data according to the digital signals and sending the oscilloscope data to the upper computer through the communication module.
5. The automotive diagnostic apparatus of claim 4, wherein the detection channel circuit comprises:
the signal conditioning circuit is used for detecting the analog signal and conditioning the analog signal; and
and the differentiator is electrically connected with the signal conditioning circuit and the corresponding analog switch and used for processing the analog signal after signal conditioning to obtain a differential signal.
6. The automotive diagnostic apparatus of claim 5, wherein the detection channel circuit further comprises a second switching circuit electrically connected between the signal conditioning circuit and the differentiator, and the second switching circuit is further electrically connected to the diagnostic protocol transceiver, wherein when the second switching circuit is controlled by the diagnostic protocol transceiver to operate in a first switching state, the signal conditioned analog signal is transmitted to the differentiator through the second switching circuit; when the second switch circuit is controlled by the diagnostic protocol transceiver to work in a second switch state, the communication waveform signal corresponding to the fault code data sent by the diagnostic protocol transceiver is transmitted to the differentiator through the second switch circuit.
7. The automotive diagnostic apparatus of claim 5, wherein the signal conditioning circuit comprises:
a probe for detecting an analog signal;
the signal attenuation circuit is electrically connected with the probe and is used for attenuating the analog signal; and
and the operational amplifier is electrically connected with the signal attenuation circuit and is used for amplifying the analog signal after attenuation processing.
8. The automotive diagnostic apparatus of claim 4, wherein the slave controller comprises:
the FPGA chip is electrically connected with the analog-to-digital conversion circuit and used for obtaining oscilloscope communication data according to the digital signal; and
and the data conversion unit is electrically connected with the FPGA chip and the communication module, and is used for converting the oscilloscope communication data into oscilloscope data and sending the oscilloscope data to the upper computer through the communication module.
9. The automotive diagnostic apparatus of claim 1, wherein the signal generating circuit comprises:
the signal amplification circuit is electrically connected with the main controller and is used for amplifying the driving signal sent by the main controller to obtain an analog waveform signal;
the first terminal is electrically connected with the signal amplification circuit and is used for transmitting the analog waveform signal; and
and the second terminal is used for grounding.
10. The automotive diagnostic apparatus of claim 4, wherein the communication module comprises:
the communication interface circuits are used for communicating with the upper computer;
the signal conversion unit is respectively electrically connected with the master controller and the slave controller and is used for converting data sent by the master controller or the slave controller into communication data of a corresponding communication interface circuit; and
and the communication chip is respectively electrically connected with the signal conversion unit and each communication interface circuit and is used for sending communication signals, selecting a target interface circuit according to the communication signals and sending data sent by the main controller or the oscilloscope circuit to the upper computer through the target interface circuit.
11. The automotive diagnostic apparatus of claim 10, wherein the plurality of communication interface circuits includes a USB interface circuit, a WIFI interface circuit, and a bluetooth interface circuit.
12. The automotive diagnostic apparatus of claim 11, wherein the signal conversion unit comprises:
the USB concentrator is respectively and electrically connected with the main controller and the oscilloscope circuit and is used for forwarding data sent by the main controller or the oscilloscope circuit;
the USB selector switch is respectively electrically connected with the USB concentrator, the communication chip and the USB interface circuit, and when the communication signal controls the USB selector switch to work in a third switch state, data forwarded by the USB concentrator is transmitted to the communication chip through the USB selector switch; when the communication signal controls the USB selector switch to work in a fourth switch state, the data forwarded by the USB concentrator is transmitted to the USB interface circuit through the USB selector switch.
13. An automotive diagnostic system, comprising:
the automotive diagnostic apparatus as set forth in any one of claims 1 to 12; and
and the upper computer is in communication connection with the automobile diagnosis equipment and is used for displaying the diagnosis data sent by the automobile diagnosis equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113242532A (en) * | 2021-05-12 | 2021-08-10 | 深圳市道通科技股份有限公司 | Vehicle communication device, WiFi connection method and vehicle diagnosis system |
| CN113242532B (en) * | 2021-05-12 | 2023-05-12 | 深圳市道通科技股份有限公司 | Vehicle communication device, wiFi connection method and vehicle diagnosis system |
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