CN113376464A - Control product test box circuit in car based on it is general - Google Patents
Control product test box circuit in car based on it is general Download PDFInfo
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Abstract
The invention relates to a universal automobile central control product test box circuit, which comprises a multi-pin aviation head interface, a power supply input interface, a bus CAN/LIN interface circuit, a relay control circuit, a USB interface, a simulation high/low level trigger circuit, an RVC interface, a user instruction test module, a product power supply monitoring interface, a product node test interface, a sound output interface circuit and a microphone interface, wherein the power supply input interface is respectively and electrically connected with a programmable power supply, an external power supply interface and a current test circuit, the relay control circuit is respectively and electrically connected with the USB interface, the simulation high/low level trigger circuit and an upper computer, the bus CAN/LIN interface circuit is electrically connected with a CAN test box, the CAN test box is electrically connected with an upper computer, and the aviation head interface is respectively and electrically connected with a tested product through a wire harness, The reversing camera is electrically connected. The invention has the advantages of reasonable design, neat layout, good universality, expansibility and normalization and high power safety.
Description
Technical Field
The invention relates to the technical field of automobile central control product testing, in particular to a universal automobile central control product testing box circuit.
Background
The existing black box test bench for the automobile central control product is formed by combining a simple power supply, a wiring board, various peripherals (such as an RVC (remote vision control) reversing module, an external power amplifier module, a 360-degree panorama box, an air conditioner control panel module, a driving recorder, a T-box, a combination instrument and the like) and other input interfaces (such as a voice module, a sound module and a USB (universal serial bus)). The existing automobile central control product test bench has the following defects:
(1) different peripheral interface modules need to be built for different product tests, so that the wire harness is irregular, the wiring is not standard, short-circuit faults are easy to occur, and the working efficiency is low;
(2) the universality and compatibility of the test bench are poor, and the test bench is very troublesome to replace when a product is transformed;
(3) the manufacturing cost of the test bench is high, and the occupied space is large.
In order to solve the problems, the invention provides a universal automobile central control product test box circuit.
Disclosure of Invention
The invention aims to solve the problems that different peripheral interface modules are required to be built for different product tests, wire harnesses are irregular and irregular in wiring, short-circuit faults are easy to occur, the working efficiency is low, the universality and the compatibility of a test bench are poor, the test bench is very troublesome to replace when a product is transformed, the manufacturing cost of the test bench is high, and the occupied space is large in the conventional test bench for automobile central control products. The concrete solution is as follows:
based on a universal test box circuit of a vehicle central control product, the test box circuit comprises a multi-pin aviation head interface, a power input interface, a bus CAN/LIN interface circuit, a relay control circuit, a USB interface, a simulation high/low level trigger circuit, an RVC interface, a user instruction test module, a product power supply monitoring interface, a product node test interface, a sound output interface circuit and a microphone interface which are respectively and electrically connected with pins of the aviation head interface, the power input interface is respectively and electrically connected with the programmable power supply, the external power supply interface and the current test circuit, the relay control circuit is respectively and electrically connected with the USB interface, the analog high/low level trigger circuit and the upper computer, the bus CAN/LIN interface circuit is electrically connected with the CAN test box, the CAN test box is electrically connected with the upper computer, and the aviation head interface is respectively and electrically connected with a tested product and the reversing camera through wiring harnesses.
Further, the power input interface comprises a power positive port and a power negative port which are electrically connected with the programmable power supply, wherein the power negative port is provided with a power ground 1, a power ground 2 and a power ground 3; the current test circuit comprises an ammeter, wherein the input end of the ammeter is electrically connected with the power ground 1, the output end of the ammeter is electrically connected with an external static current test end and one end of a change-over switch after being connected with a fuse in series, the other ends of the external static current test end and the change-over switch are electrically connected with a pin73 of an aviation head interface, and the power supply end of the ammeter is electrically connected with a 12V-to-5V module.
Further, the relay control circuit comprises a relay control chip, pins 1 and 2 of the relay control chip are electrically connected with a 12V regulated power supply, pins 5, 6 and 7 of the relay control chip are electrically connected with an upper computer through RS232, OUT1 of the relay control chip is electrically connected with an ignition key ACC lead of an aviation head interface pin5 through a relay K1, OUT2 of the relay control chip is electrically connected with a storage battery lead of the aviation head interface pin6 through a relay K2, OUT3, OUT4 and OUT5 of the relay control chip are electrically connected with power supply pins of USB1, USB2 and USB3 of a USB interface through relays K3, K4 and K5 respectively, OUT6 to OUT14 of the relay control chip enable pins 74 to 82 of the aviation head interface to be electrically connected with a plurality of analog high/low level trigger circuits through relays K6 to K14 respectively, and OUT15 of the relay control chip enables a high/low level output 2 interface to be electrically connected with the analog high/low level trigger circuit through relay K15, the OUT16 of the relay control chip electrically connects the high/low level output 1 interface with the analog high/low level trigger circuit through the relay K16.
Further, the analog high/low level trigger circuit comprises a ship-shaped or toggle switch, wherein the switch comprises two input pins and an output pin, one input pin is electrically connected with the positive power supply, and the other input pin is electrically connected with the power ground 1 or the power ground 2.
Furthermore, the bus CAN/LIN interface circuit comprises an inner connecting port and CAN and LIN outer connecting ports, wherein the inner connecting port is electrically connected with the CAN testing box through CAN and LIN interfaces, the CAN and LIN outer connecting ports are connected with the inner connecting port in parallel, the inner connecting CAN interface is provided with a terminal resistor and a selection switch, the inner connecting CAN and LIN interfaces are simultaneously and electrically connected with CAN and LIN terminals on a panel of the testing box and corresponding pins of the aviation head interface, and the ground of the bus CAN/LIN interface circuit is electrically connected with a power ground 1.
Further, the product power supply monitoring interface comprises an ACC monitoring port for electrically connecting the product to be tested with a pin5 of the aviation head interface, a storage battery monitoring port for electrically connecting the product to be tested with a pin6 of the aviation head interface, and a power ground 1 port for electrically connecting the product to be tested with a pin73 of the aviation head interface; the external power supply interface comprises a plurality of groups of power supply positive sockets and power supply negative sockets which are connected with the power supply input interface in parallel, and the power supply negative sockets are electrically connected with a power ground 3.
Further, the product node test interface comprises nodes 1 to 8 ports which are respectively electrically connected with a plurality of nodes in the tested product through pins 41 to 48 of the aviation head interface, and the nodes 1 to 8 ports are used for testing the tested product by external equipment. The user instruction testing module comprises a wire control interface or an instruction indicator lamp which is respectively and electrically connected with a plurality of wire control signals in a tested product through pins 21 to 28 of the aviation head interface.
Furthermore, the microphone interface comprises a plurality of groups of microphone power supply positive jacks, microphone power supply negative jacks and microphone input jacks which are electrically connected with a microphone circuit in a tested product through pins of the aviation head interface and are used for testing the voice function.
Furthermore, the RVC interface comprises an RVC _ VCC socket connected with the power supply positive electricity of the reversing camera through a pin33 of the aviation head interface, an RVC _ GND socket connected with the power supply negative electricity of the reversing camera through a pin34 of the aviation head interface, a CVBS + socket electrically connected with the video signal of the reversing camera through a pin35 of the aviation head interface, and a CVBS-socket electrically connected with the video signal of the reversing camera through a pin36 of the aviation head interface.
Further, sound output interface circuit includes multiunit earphone socket, loudspeaker socket, double knives change over switch, earphone matching circuit, and double knives change over switch is used for the test switching between earphone socket and the loudspeaker socket, and earphone matching circuit's input is connected with double knives change over switch electricity, and earphone matching circuit's output is connected with the earphone socket electricity, and double knives change over switch is connected with the sound output circuit electricity of being surveyed the product through pin11 to 18 of aviation head interface.
In summary, the technical scheme of the invention has the following beneficial effects:
the invention solves the problems that different peripheral interface modules are required to be built for testing different products in the conventional automobile central control product testing rack, so that the wire harness is irregular, the wiring is not standard, short-circuit faults are easy to occur, the working efficiency is low, the universality and the compatibility of the testing rack are poor, the replacement of the testing rack is very troublesome during product transformation, the manufacturing cost of the testing rack is high, and the occupied space is large. Because the number of the PIN PINs of the automobile central control product is large, the invention covers all the PIN PIN functions of the current automobile central control product by integrating the input/output of the PIN PINs with different functions of different automobile central control products into a unified interface, thereby forming a universal aviation head interface and a peripheral equipment interface and having the compatibility and the expansibility of the PIN PINs. A plurality of reserved PIN PINs in the aircraft nose interface are reserved, and the method is convenient for testing compatibility and expansion of new products. In a word, the invention has the advantages of reasonable design, neat layout, good universality, expansibility and normalization and high power safety.
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 of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a block diagram of a universal vehicle central control product test box circuit-based vehicle central control product of the present invention;
FIG. 2 is a circuit diagram of a relay control circuit and an analog high/low level trigger circuit according to the present invention;
FIG. 3 is a circuit diagram of a bus CAN/LIN interface circuit of the present invention;
FIG. 4 is a circuit diagram of the power input interface and the current test circuit of the present invention;
FIG. 5 is a circuit diagram of a product power supply monitoring interface of the present invention;
fig. 6 is a circuit diagram of an external power supply interface according to the present invention;
FIG. 7 is a circuit diagram of a product node test interface of the present invention;
FIG. 8 is a circuit diagram of a microphone interface of the present invention;
FIG. 9 is a circuit diagram of the RVC interface of the present invention;
fig. 10 is a circuit diagram of the inventive audio output interface circuit.
Description of reference numerals:
100-an aircraft head interface, 101-a power supply input interface, 102-a current test circuit, 110-a bus CAN/LIN interface circuit, 111-a CAN test box, 120-a relay control circuit, 121-a USB interface, 122-an analog high/low level trigger circuit, 130-an RVC interface, 140-a user instruction test module, 141-a product power supply monitoring interface, 142-a product node test interface, 143-a sound output interface circuit, 144-a microphone interface, 200-a programmable power supply, 201-an external power supply interface, 300-an upper computer, 400-a tested product and 500-a reversing camera.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Interpretation of terms: RVC is an abbreviation of Rear View Camera, English, and Chinese is a reversing Camera. CAN is an abbreviation of Controller Area Network, meaning Controller Area Network. The LIN bus is a low-cost serial communication network defined for automotive distributed electronic systems.
As shown in fig. 1 to 10, a universal vehicle central control product-based test box circuit includes a multi-PIN aircraft head interface 100, a power input interface 101 respectively electrically connected to a PIN (i.e., PIN) of the aircraft head interface 100, a bus CAN/LIN interface circuit 110, a relay control circuit 120, a USB interface 121, an analog high/low level trigger circuit 122, an RVC interface 130, a user instruction test module 140, a product power supply monitoring interface 141, a product node test interface 142, a sound output interface circuit 143, and a microphone interface 144, wherein the power input interface 101 is respectively electrically connected to a programmable power supply 200, an external power supply interface 201, and a current test circuit 102, the relay control circuit 120 is respectively electrically connected to the USB interface 121, the analog high/low level trigger circuit 122, and an upper computer 300, and the bus CAN/LIN interface circuit 110 is electrically connected to a CAN test box 111, the CAN test box 111 is electrically connected to the upper computer 300, and the aviation head interface 100 is electrically connected to a product 400 to be tested (for example, an automobile console) and the reversing camera 500 through a wire harness.
Further, the power input interface 101 comprises a power positive port and a power negative port electrically connected to the programmable power supply 200, wherein the power negative port is provided with a power ground 1, a power ground 2 and a power ground 3. The current test circuit 102 comprises an ammeter, wherein the input end of the ammeter is electrically connected with a power ground 1, the output end of the ammeter is electrically connected with an external static current test end J and one end of a change-over switch S9 after being connected with a fuse in series, the other ends of the external static current test end J and the change-over switch S9 are electrically connected with a PIN PIN73 of the aviation head interface 100, the power supply end of the ammeter is electrically connected with a 12V-to-5V module, and the 12V-to-5V module is electrically connected with a 12V voltage-stabilized power supply.
Further, the relay control circuit 120 includes a relay control chip U1 (the model of the electrical appliance control chip U1 is JY-DAM1600, which is a 16-way relay controller, and belongs to the prior art, and the detailed working principle thereof is not described herein), PINs 1 and 2 of the relay control chip U1 are electrically connected with a 12V regulated power supply, PINs 5, 6, and 7 of the relay control chip U1 are electrically connected with the upper computer 300 through RS232, PIN OUT1 of the relay control chip U1 is electrically connected with an ignition key lead (which is led from a tested product, namely a console, and the ACC lead is electrically connected to the positive power supply at the time of ACC test) of PIN5 of the aircraft head interface 100 through a relay K1, PIN OUT2 of the relay control chip U1 is electrically connected with a battery lead (which is electrically connected to the positive power supply at the time of ACC test) of PIN6 of the aircraft head interface 100 through a relay K2, and PIN OUT3 and PIN3 of the relay control chip U1, The OUT4 and OUT5 are electrically connected to the power supply pins (i.e. USB1_ VCC1, USB2_ VCC2 and USB3_ VCC3) of USB1, USB2 and USB3 of the USB interface 121 through relays K3, K4 and K5, respectively, the power supply pins of each of USB1, USB2 and USB3 are divided into two ends, one end of each of the power supply pins is connected to USB1, USB2 and USB3, and the other end of each of the power supply pins is connected to the power supply terminals of USB1_ VCC1, USB2_ VCC2 and USB3_ VCC3 of the tested product 400.
The OUT6 to OUT14 of the relay control chip U1 enable PINs PIN74 to PIN82 of the aviation head interface 100 to be electrically connected with the plurality of analog high/low level trigger circuits 122 through relays K6 to K14 respectively, the OUT15 of the relay control chip U1 enables a high/low level output 2 interface to be electrically connected with the analog high/low level trigger circuits 122 through a relay K15, and the OUT16 of the relay control chip U1 enables a high/low level output 1 interface to be electrically connected with the analog high/low level trigger circuits 122 through a relay K16.
Further, the analog high/low level trigger circuit 122 includes a boat or toggle switch (e.g., S1-S6 in fig. 2) including two input pins and one output pin, wherein one input pin is electrically connected to the power supply positive and the other input pin is electrically connected to the power supply ground 1 or the power supply ground 2.
Further, the bus CAN/LIN interface circuit 110 includes an internal interface (for example, CAN1, CAN2, LIN formed by DB9 sockets) electrically connected to the CAN test box 111, and a CAN/LIN external interface (for example, CAN11, CAN22, LIN1 formed by DB9 sockets) connected in parallel to the internal interface, the internal CAN interface is provided with a terminal resistor and a selector switch (for example, a terminal resistor 1 arranged between CAN1L and CAN1H, a selector switch S7, a terminal resistor 2 arranged between CAN2L and CAN2H, and a selector switch S8), the internal CAN/LIN interface is electrically connected to the CAN and LIN terminals on the test box panel (not shown in the figure) and corresponding PINs of the aviation header interface 100 (for example, CAN1L is electrically connected to PIN52, CAN1H and 51, CAN2L is electrically connected to PIN62, CAN2H is electrically connected to CAN 61), and the PIN/LIN interface circuit 110 is electrically connected to the ground.
Further, the product power supply monitoring interface 141 includes an ACC monitoring port through which the product 400 to be tested is electrically connected to the PIN5 of the aircraft head interface 100 (the ACC monitoring port may be electrically connected to a positive power supply during testing), a battery monitoring port through which the product 400 to be tested is electrically connected to the PIN6 of the aircraft head interface 100 (the battery monitoring port may be electrically connected to a positive power supply during testing), and a power ground 1 port through which the product 400 to be tested is electrically connected to the PIN73 of the aircraft head interface 100. The external power supply interface 201 includes multiple sets of power positive sockets (e.g., 12 power positive sockets shown in fig. 6) and power negative sockets (e.g., 6 power negative sockets shown in fig. 6) connected in parallel with the power input interface 101, and the power negative sockets are electrically connected to the power ground 3.
Further, the product node test interface 142 includes nodes 1 to 8 (as shown in fig. 7) electrically connected to a plurality of nodes (not shown) in the product under test 400 through PINs PIN41 to PIN48 of the air head interface 100, respectively, and the nodes 1 to 8 are used for testing the product under test 400 by external devices (not shown). The user command testing module 140 includes a wire control interface or a command indicator light (not shown) electrically connected to a plurality of wire control signals (not shown) in the product 400 to be tested through PINs PIN21 to PIN28 of the aircraft head interface 100, respectively, wherein the wire control interface can be electrically connected to an external testing device or apparatus to implement a test, or some of the wire control signals can be converted into signals of the indicator light through a set command indicator light assembly board (not shown).
Further, the microphone interface 144 includes multiple sets of microphone power supply positive sockets (e.g., MIC1_ VCC, MIC2_ VCC), microphone power supply negative sockets (e.g., MIC1_ GND, MIC2_ GND), microphone input sockets (e.g., microphone 1 electrically connected to PIN1, microphone 2 electrically connected to PIN2, microphone 3 electrically connected to PIN3, and microphone 4 electrically connected to PIN 4) electrically connected to a microphone circuit (not shown) in the product under test 400 through PINs of the aircraft head interface 100, for testing a voice function. The power supply ends of the microphone 3 and the microphone 4 (including a microphone power supply positive socket and a microphone power supply negative socket) are respectively connected in parallel with the power supply ends of the microphone 1 and the microphone 1.
Further, the RVC interface 130 includes an RVC _ VCC socket electrically connected to a power supply positive (referred to as RVC _ VCC) of the back-up camera 500 through a PIN33 of the aviation head interface 100, an RVC _ GND socket electrically connected to a power supply negative (referred to as RVC _ GND) of the back-up camera 500 through a PIN34 of the aviation head interface 100, a CVBS + socket electrically connected to a video signal of the back-up camera 500 through a PIN35 of the aviation head interface 100, and a CVBS-socket electrically connected to a video signal of the back-up camera 500 through a PIN36 of the aviation head interface 100.
Further, the sound output interface circuit 143 includes a plurality of sets of earphone jacks (e.g., earphone jacks 1 to 4), speaker jacks (e.g., RR horn holes +, RR horn holes-, FR horn holes +, FR horn holes-, FL horn holes +, FL horn holes-), a dual-pole switch (e.g., S10-S13), an earphone matching circuit (composed of voltage dividing resistors 40K Ω, 10K Ω and a coupling capacitor 33 μ F), the dual-pole switch is used for testing and switching between the earphone jacks and the speaker jacks, an input terminal of the earphone matching circuit is electrically connected to the dual-pole switch, an output terminal of the earphone matching circuit is electrically connected to the earphone jacks, and the dual-pole switch is electrically connected to a sound output circuit (not shown in the figure) of the product under test 400 through PINs PIN11 to PIN18 of the aircraft head interface 100. In order to facilitate the operation during the test, a horn row seat JP connected with the horn socket in parallel is arranged.
The pin definition of the aircraft head interface 100 is shown in the following table, where a plurality of pins are reserved for expansion:
in summary, the technical scheme of the invention has the following beneficial effects:
the invention solves the problems that different peripheral interface modules are required to be built for testing different products in the conventional automobile central control product testing rack, so that the wire harness is irregular, the wiring is not standard, short-circuit faults are easy to occur, the working efficiency is low, the universality and the compatibility of the testing rack are poor, the replacement of the testing rack is very troublesome during product transformation, the manufacturing cost of the testing rack is high, and the occupied space is large. Because the number of the PIN PINs of the automobile central control product is large, the invention covers all the PIN PIN functions of the current automobile central control product by integrating the input/output of the PIN PINs with different functions of different automobile central control products into a unified interface, thereby forming a universal aviation head interface and a peripheral equipment interface and having the compatibility and the expansibility of the PIN PINs. A plurality of reserved PIN PINs in the aircraft nose interface are reserved, and the method is convenient for testing compatibility and expansion of new products. In a word, the invention has the advantages of reasonable design, neat layout, good universality, expansibility and normalization and high power safety.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. Accuse product test box circuit in car based on it is general, its characterized in that: the aircraft head interface comprises a multi-pin aircraft head interface, a power input interface, a bus CAN/LIN interface circuit, a relay control circuit, a USB interface, a simulation high/low level trigger circuit, an RVC interface, a user instruction test module, a product power supply monitoring interface, a product node test interface, a sound output interface circuit and a microphone interface, wherein the power input interface is respectively electrically connected with a programmable power supply, an external power supply interface and a current test circuit, the relay control circuit is respectively electrically connected with the USB interface, the simulation high/low level trigger circuit and an upper computer, the bus CAN/LIN interface circuit is electrically connected with a CAN test box, the CAN test box is electrically connected with an upper computer, and the aircraft head interface is respectively electrically connected with a tested product and a reversing camera through wiring harnesses.
2. The universal-based automotive central control product test box circuit as claimed in claim 1, wherein: the power input interface comprises a power positive port and a power negative port which are electrically connected with the programmable power supply, wherein the power negative port is provided with a power ground 1, a power ground 2 and a power ground 3; the current test circuit comprises an ammeter, wherein the input end of the ammeter is electrically connected with the power ground 1, the output end of the ammeter is electrically connected with an external static current test end and one end of a change-over switch after being connected with a fuse in series, the other ends of the external static current test end and the change-over switch are electrically connected with a pin73 of an aviation head interface, and the power supply end of the ammeter is electrically connected with a 12V-to-5V module.
3. The universal-based automotive central control product test box circuit as claimed in claim 2, wherein: the relay control circuit comprises a relay control chip, pins 1 and 2 of the relay control chip are electrically connected with a 12V regulated power supply, pins 5, 6 and 7 of the relay control chip are electrically connected with an upper computer through RS232, an OUT1 of the relay control chip is electrically connected with an ignition key ACC lead of an aviation head interface pin5 through a relay K1, an OUT2 of the relay control chip is electrically connected with a storage battery lead of the aviation head interface pin6 through a relay K2, OUT3, OUT4 and OUT5 of the relay control chip are electrically connected with power supply pins of USB1, USB2 and USB3 of a USB interface through relays K3, K4 and K5 respectively, OUT6 to OUT2 of the relay control chip enable pins 74 to 82 of the aviation head interface to be electrically connected with a plurality of analog high/low level trigger circuits through relays K6 to K14 respectively, and OUT15 of the relay control chip enables a high/low level output 2 interface to be electrically connected with the analog high/low level trigger circuit through a relay K15, the OUT16 of the relay control chip electrically connects the high/low level output 1 interface with the analog high/low level trigger circuit through the relay K16.
4. The universal-based automotive central control product test box circuit as claimed in claim 3, wherein: the analog high/low level trigger circuit comprises a ship-shaped or toggle switch, wherein the switch comprises two input pins and an output pin, one input pin is electrically connected with a positive power supply, and the other input pin is electrically connected with a power supply ground 1 or a power supply ground 2.
5. The universal-based automotive central control product test box circuit as claimed in claim 4, wherein: the bus CAN/LIN interface circuit comprises an inner connecting port and CAN and LIN outer connecting ports, wherein the inner connecting port is electrically connected with a CAN test box through CAN and LIN interfaces, the CAN and LIN outer connecting ports are connected with the inner connecting port in parallel, the inner connecting CAN interface is provided with a terminal resistor and a selection switch, the inner connecting CAN and LIN interfaces are simultaneously and electrically connected with CAN and LIN terminals on a panel of the test box and corresponding pins of an aviation head interface, and the ground of the bus CAN/LIN interface circuit is electrically connected with a power ground 1.
6. The universal-based automotive central control product test box circuit as claimed in claim 5, wherein: the product power supply monitoring interface comprises an ACC monitoring port for electrically connecting a tested product with a pin5 of the aviation head interface, a storage battery monitoring port for electrically connecting the tested product with a pin6 of the aviation head interface, and a power ground 1 port for electrically connecting the tested product with a pin73 of the aviation head interface; the external power supply interface comprises a plurality of groups of power supply positive sockets and power supply negative sockets which are connected with the power supply input interface in parallel, and the power supply negative sockets are electrically connected with a power ground 3.
7. The universal-based automotive central control product test box circuit as claimed in claim 1, wherein: the product node test interface comprises nodes 1 to 8 ports which are respectively and electrically connected with a plurality of nodes in a tested product through pins 41 to 48 of the aviation head interface, and the nodes 1 to 8 ports are used for testing the tested product by external equipment; the user instruction testing module comprises a wire control interface or an instruction indicator lamp which is respectively and electrically connected with a plurality of wire control signals in a tested product through pins 21 to 28 of the aviation head interface.
8. The universal-based automotive central control product test box circuit as claimed in claim 1, wherein: the microphone interface comprises a plurality of groups of microphone power supply positive jacks, microphone power supply negative jacks and microphone input jacks which are electrically connected with a microphone circuit in a tested product through pins of the aviation head interface and is used for testing the voice function.
9. The universal-based automotive central control product test box circuit as claimed in claim 1, wherein: the RVC interface comprises an RVC _ VCC socket connected with the power supply positive electricity of the reversing camera through a pin33 of the aviation head interface, an RVC _ GND socket connected with the power supply negative electricity of the reversing camera through a pin34 of the aviation head interface, a CVBS + socket electrically connected with the video signal of the reversing camera through a pin35 of the aviation head interface, and a CVBS-socket electrically connected with the video signal of the reversing camera through a pin36 of the aviation head interface.
10. The universal-based automotive central control product test box circuit as claimed in claim 1, wherein: the sound output interface circuit comprises a plurality of groups of earphone sockets, a loudspeaker socket, a double-pole change-over switch and an earphone matching circuit, the double-pole change-over switch is used for testing and switching between the earphone socket and the loudspeaker socket, the input end of the earphone matching circuit is electrically connected with the double-pole change-over switch, the output end of the earphone matching circuit is electrically connected with the earphone socket, and the double-pole change-over switch is electrically connected with the sound output circuit of a tested product through pins 11 to 18 of an aviation head interface.
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