CN107908176B - Vehicle control unit driving port detection device and detection method thereof - Google Patents
Vehicle control unit driving port detection device and detection method thereof Download PDFInfo
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- CN107908176B CN107908176B CN201711100724.3A CN201711100724A CN107908176B CN 107908176 B CN107908176 B CN 107908176B CN 201711100724 A CN201711100724 A CN 201711100724A CN 107908176 B CN107908176 B CN 107908176B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
The invention discloses a detection device and a detection method for a drive port of a vehicle control unit. The detection device includes: the first end of the first resistor is used for being connected with a high-side driving port of the vehicle control unit, a coil of the first relay is connected between a power supply end and a test system, one end of a contact of the first relay is connected with the second end of the first resistor, and the other end of the contact of the first relay is grounded; the testing system comprises a first resistor, a second resistor and a second relay, wherein the first end of the second resistor is connected with a power supply end, a coil of the second relay is connected between the power supply end and the testing system, one end of a contact of the second relay is connected with the second end of the second resistor, and the other end of the contact of the second relay is used for being connected with a low-side driving port of the whole vehicle controller. The invention can verify whether the fault detection function of the driving port of the whole vehicle controller is normal. The invention has simple design scheme, low cost and easy implementation.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a device and a method for detecting a driving port of a vehicle control unit.
Background
In an electric automobile, a vehicle controller is used as a control system of the whole automobile and is a key part influencing the performance and safety of the whole automobile. The fault code can correctly reflect whether the whole vehicle has a fault and can guide after-sales maintenance personnel to quickly locate the fault reason.
The failure of the driving port of the whole vehicle controller reflects the current state of a part driven by the whole vehicle controller on the whole vehicle, but in the prior art, the verification of the failure detection function of the driving port of the whole vehicle controller generally depends on empirical judgment, the efficiency is low, and the accuracy can not be ensured frequently. Therefore, how to design a system for verifying the fault detection function of the driving port of the vehicle controller, and verify whether the fault detection function of the driving port of the vehicle controller works correctly and whether the electrical parameters of the parts driven by the vehicle controller and the vehicle controller are matched and reasonably set in the development process of the vehicle, is a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention mainly aims to provide a device for detecting a driving port of a vehicle control unit, which is used for automatically verifying the fault detection function of the driving port of the vehicle control unit through a system.
In order to achieve the above object, the present invention provides a detection apparatus for a driving port of a vehicle control unit, including:
the first end of the first resistor is used for being connected with a high-side driving port of the vehicle control unit, a coil of the first relay is connected between a power supply end and a test system, one end of a contact of the first relay is connected with the second end of the first resistor, and the other end of the contact of the first relay is grounded;
the testing system comprises a first resistor, a second resistor and a second relay, wherein the first end of the second resistor is connected with a power supply end, a coil of the second relay is connected between the power supply end and the testing system, one end of a contact of the second relay is connected with the second end of the second resistor, and the other end of the contact of the second relay is used for being connected with a low-side driving port of the whole vehicle controller.
Preferably, the detection device further comprises:
the first end of the third resistor is connected with the power supply end, the coil of the third relay is connected between the power supply end and the test system, and one end of the contact of the third relay is connected with the second end of the third resistor and the other end of the contact of the third relay is connected with the first end of the first resistor.
Preferably, the detection device further comprises:
the positive pole of the first capacitor is connected with the first end of the first resistor, the coil of the fourth relay is connected between the power supply end and the test system, and one end of the contact of the fourth relay is connected with the negative pole of the first capacitor and the other end of the contact of the fourth relay is grounded.
Preferably, the detection device further comprises:
the first end of the fourth resistor is connected with the other end of the contact of the second relay, the coil of the fifth relay is connected between the power supply end and the test system, and one end of the contact of the fifth relay is connected with the second end of the fourth resistor and the other end of the contact of the fourth relay is grounded.
Preferably, the detection device further comprises:
the testing system comprises a second capacitor and a sixth relay, wherein the positive electrode of the second capacitor is connected with a power supply end, a coil of the sixth relay is connected between the power supply end and the testing system, one end of a contact of the sixth relay is connected with the negative electrode of the second capacitor, and the other end of the contact of the sixth relay is connected with the other end of the contact of the second relay.
Preferably, the first resistor and the second resistor of the detection device are both adjustable resistors.
Preferably, the test system of the detection device is connected with a high-bit data line and a low-bit data line which are used for being connected with a vehicle control unit.
The invention also provides a detection method of the detection device for the driving port of the vehicle control unit, which comprises the following steps:
step S10: sending an instruction for disabling the high-side driving port to the vehicle controller, controlling the first relay to be switched off, and reading a fault code sent by the vehicle controller;
step S20: and sending an instruction for disabling the low-side driving port to the vehicle controller, controlling the second relay to be disconnected, and reading a fault code sent by the vehicle controller.
Preferably, the step S10 is followed by:
step S11: sending an instruction enabling a high-side driving port to the vehicle controller, controlling a first relay to be closed, and reading a fault code sent by the vehicle controller;
the step S20 includes the following steps:
step S21: and sending an instruction for enabling the low-side driving port to the vehicle controller, controlling the second relay to be closed, and reading a fault code sent by the vehicle controller.
Preferably, the steps S11 and S21 are followed by: and after a preset cycle period, reading whether the fault code is erased from the memory of the whole vehicle controller.
According to the technical scheme, the detection device for the driving port of the vehicle control unit comprises a first resistor, a first relay, a second resistor and a second relay, and when the first relay and the second relay are closed, normal connection of a high-side driving port and a low-side driving port can be simulated; when the first relay and the second relay are both switched off, the open-circuit fault of the high-side driving port and the low-side driving port can be simulated. According to the invention, the occurrence and recovery of the fault are controlled through the first relay and the second relay, and the fault code state sent by the vehicle controller is read through the test system, so that whether the fault detection function of the drive port of the vehicle controller is normal or not can be verified. The invention has simple design scheme, low cost and easy implementation.
In a further technical scheme, the fault detection method can also simulate the short-circuit to ground fault and the short-circuit to power fault of the high-side drive port and the low-side drive port, and further verify the fault detection function of the drive port of the whole vehicle controller.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a drive port detection device of a vehicle control unit according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the detection apparatus for a driving port of a vehicle control unit according to an embodiment of the present invention at least includes a first resistor R1, a first relay K1, a second resistor R2, and a second relay K2. A first end of the first resistor R1 is used for connecting a high-side driving port HSD of the vehicle control unit 1, a coil of the first relay K1 is connected between a power supply terminal VCC and the test system 2, one end of a contact of the first relay K1 is connected to a second end of the first resistor R1, and the other end of the contact is grounded GND; the first end of the second resistor R2 is connected with the power supply end, the coil of the second relay K2 is connected between the power supply end and the test system 2, one end of the contact of the second relay K2 is connected with the second end of the second resistor R2, and the other end of the contact is used for being connected with a low-side driving port LSD of the vehicle control unit 1.
When the first relay K1 and the second relay K2 are closed, the normal connection of the HSD and the LSD of the high-side driving port and the low-side driving port can be simulated; when the first relay K1 and the second relay K2 are both turned off, open-circuit faults of the high-side drive port HSD and the low-side drive port LSD can be simulated. According to the embodiment, the occurrence and recovery of the fault are controlled through the first relay K1 and the second relay K2, the state of the fault code sent by the vehicle control unit 1 is read through the test system 2, and whether the fault detection function of the drive port of the vehicle control unit is normal or not can be verified.
Further, in order to simulate a power failure caused by a short-circuit of HSD at the high-side drive port, the vehicle control unit drive port detection apparatus according to this embodiment further includes a third resistor R3 and a third relay K3, a first end of the third resistor R3 is connected to the power supply terminal, a coil of the third relay K3 is connected between the power supply terminal and the test system 2, one end of a contact of the third relay K3 is connected to a second end of the third resistor R3, and the other end of the contact is connected to a first end of the first resistor R1.
The third relay K3 is normally connected when it is open. When the high-side driving port HSD is set to be not enabled in the test system 2 and the first relay K1 and the third relay K3 are both closed, the short circuit of the high-side driving port HSD to a power failure can be simulated.
In addition, the embodiment may further include a first capacitor C1 and a fourth relay K4 as shown in fig. 1 to simulate a short-to-ground fault at the high-side drive port HSD. The positive pole of the first capacitor C1 is connected with the first end of the first resistor R1, the coil of the fourth relay K4 is connected between the power supply end and the test system 2, one end of the contact of the fourth relay K4 is connected with the negative pole of the first capacitor C1, and the other end of the contact is grounded.
The fourth relay K4 is normally connected when it is open. When the high-side driving port HSD is enabled and the first relay K1 and the fourth relay K4 are closed in the test system 2, the fault that the high-side driving port HSD is short-circuited to the ground can be simulated.
Preferably, in order to simulate a short-circuit to ground fault of the low-side drive port LSD, the vehicle control unit drive port detection apparatus according to this embodiment further includes a fourth resistor R4 and a fifth relay K5, a first end of the fourth resistor R4 is connected to the other end of the contact of the second relay K2, a coil of the fifth relay K5 is connected between the power supply terminal and the test system 2, and one end of the contact of the fifth relay K5 is connected to a second end of the fourth resistor R4 and the other end is grounded.
The fifth relay K5 is normally connected when it is open. When the low side driving port LSD is set to be not enabled in the test system 2 and the second relay K2 and the fifth relay K5 are both closed, the fault that the low side driving port LSD is short-circuited to the ground can be simulated.
In addition, the embodiment further includes a second capacitor C2 and a sixth relay K6 as shown in fig. 1 to simulate a short circuit of the low side drive port LSD to a power failure. The positive electrode of the second capacitor C2 is connected with the power supply end, the coil of the sixth relay K6 is connected between the power supply end and the test system 2, one end of the contact of the sixth relay K6 is connected with the negative electrode of the second capacitor C2, and the other end of the contact of the sixth relay K2 is connected with the other end of the contact of the second relay K2.
The sixth relay K6 is normally connected when it is open. When the low side driving port LSD is enabled in the test system 2 and the second relay K2 and the sixth relay K6 are closed, the short circuit of the low side driving port LSD to the power supply fault can be simulated.
The resistors and the capacitors need to be properly selected according to the actual condition of the circuit, and the adjustable resistors and the adjustable capacitors can be also used and adjusted to be proper values, so that the electrical characteristics of the electrical load of the parts can be simulated, and whether the electrical parameters of the parts driven by the vehicle control unit 1 are matched with the electrical parameters of the vehicle control unit 1 or not can be detected, and the setting is reasonable.
And the test system 2 is connected with a high-bit data line CAN-H and a low-bit data line CAN-L which are used for being connected with the vehicle control unit 1 and used for communicating with the vehicle control unit 1. The high-order data wire and the low-order data wire CAN be twisted together, so that the CAN bus is insensitive to electromagnetic interference.
The invention also provides a detection method of the detection device of the driving port of the vehicle control unit in the embodiment, which comprises the following steps:
step S10: sending an instruction for enabling the HSD of the high-side driving port to be disabled to the vehicle control unit 1, controlling the first relay K1 to be switched off, and reading a fault code sent by the vehicle control unit 1;
step S20: and sending an instruction for disabling the low-side drive port LSD to the vehicle control unit 1, controlling the second relay K2 to be switched off, and reading a fault code sent by the vehicle control unit 1.
In step S10, a fault code of the high-side drive port HSD sent by the vehicle controller 1 and having an open-circuit fault can be verified; in step S20, the fault code of the open circuit fault at the low side drive port LSD sent by the vehicle control unit 1 can be verified.
For clarity and brief description of the technical solution of the present application, step S10 is listed before step S20. It should be clear that the foregoing step S20 may be either before step S10 or after step S10, and the present invention is not limited thereto.
Further, the step S10 is followed by:
step S11: and sending a command enabling the HSD to the vehicle control unit 1, controlling the first relay K1 to be closed, and reading a fault code sent by the vehicle control unit 1.
Further, the step S20 is followed by:
step S21: and sending an instruction for enabling the low-side drive port LSD to the vehicle control unit 1, controlling the second relay K2 to be closed, and reading a fault code sent by the vehicle control unit 1.
In step S11, a fault code when HSD open circuit fault of the high-side drive port occurs and is recovered in the vehicle controller 1 can be verified, and normally, the fault code is displayed as a fault but the fault code state is a historical fault; in step S12, the fault code when the vehicle control unit 1 has an open-circuit fault at the low side drive port LSD and recovers can be verified, and the fault code status is a history fault although it is normally indicated as a fault.
Further, the steps S11 and S21 are followed by:
step 30: after a preset cycle period, whether the fault code is erased from the memory of the vehicle control unit 1 is read.
After the preset cycle period, the fault code is erased from the memory of the vehicle controller 1, so that the electric vehicle can be delivered to use in an empty state in the memory of the vehicle controller 1.
In addition, the detection method of the present invention further comprises verifying that the high side drive port HSD is shorted to a power failure, the high side drive port HSD is shorted to a ground failure, the low side drive port LSD is shorted to a ground failure, and the low side drive port LSD is shorted to a power failure, respectively, as follows. The method comprises the following steps:
step 40: and sending an instruction for disabling the HSD to the vehicle control unit 1, controlling the first relay K1 and the third relay K3 to be closed, and reading a fault code sent by the vehicle control unit 1. In step 40, a fault code of the short-circuit to power failure of the HSD at the high-side drive port sent by the vehicle controller 1 can be verified.
Step 50: and sending an instruction enabling the HSD to the vehicle control unit 1, controlling the first relay K1 and the fourth relay K4 to be closed, and reading a fault code sent by the vehicle control unit 1. In step 50, a fault code of the short-circuit to ground fault of the HSD at the high-side drive port sent by the vehicle controller 1 can be verified.
Step 60: and sending an instruction for disabling the low-side drive port LSD to the vehicle control unit 1, controlling the second relay K2 and the fifth relay K5 to be closed, and reading a fault code sent by the vehicle control unit 1. In step 60, a fault code of the short-circuit to ground fault of the low-side drive port LSD sent by the vehicle controller 1 can be verified.
Step 70: and sending an instruction enabling the low-side drive port LSD to the vehicle controller 1, controlling the second relay K2 and the sixth relay K6 to be closed, and reading a fault code sent by the vehicle controller 1. In step 70, a fault code indicating that the low-side drive port LSD sent by the vehicle control unit 1 is short-circuited to a power failure can be verified.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a vehicle control unit drive mouth detection device which characterized in that includes:
the first end of the first resistor is used for being connected with a high-side driving port of the vehicle control unit, a coil of the first relay is connected between a power supply end and a test system, one end of a contact of the first relay is connected with the second end of the first resistor, and the other end of the contact of the first relay is grounded;
the first end of the second resistor is connected with the power supply end, the coil of the second relay is connected between the power supply end and the test system, one end of the contact of the second relay is connected with the second end of the second resistor, and the other end of the contact of the second relay is used for being connected with a low-side driving port of the whole vehicle controller; the first resistor and the second resistor are both adjustable resistors; and the test system is connected with a high-bit data line and a low-bit data line which are used for being connected with the whole vehicle controller.
2. The vehicle control unit driving port detection device according to claim 1, further comprising:
the first end of the third resistor is connected with the power supply end, the coil of the third relay is connected between the power supply end and the test system, and one end of the contact of the third relay is connected with the second end of the third resistor and the other end of the contact of the third relay is connected with the first end of the first resistor.
3. The vehicle control unit driving port detection device according to claim 1, further comprising:
the positive pole of the first capacitor is connected with the first end of the first resistor, the coil of the fourth relay is connected between the power supply end and the test system, and one end of the contact of the fourth relay is connected with the negative pole of the first capacitor and the other end of the contact of the fourth relay is grounded.
4. The vehicle control unit driving port detection device according to claim 1, further comprising:
the first end of the fourth resistor is connected with the other end of the contact of the second relay, the coil of the fifth relay is connected between the power supply end and the test system, and one end of the contact of the fifth relay is connected with the second end of the fourth resistor and the other end of the contact of the fourth relay is grounded.
5. The vehicle control unit driving port detection device according to claim 1, further comprising:
the testing system comprises a second capacitor and a sixth relay, wherein the positive electrode of the second capacitor is connected with a power supply end, a coil of the sixth relay is connected between the power supply end and the testing system, one end of a contact of the sixth relay is connected with the negative electrode of the second capacitor, and the other end of the contact of the sixth relay is connected with the other end of the contact of the second relay.
6. The detection method of the detection device of the drive port of the vehicle control unit according to claim 1, characterized by comprising the following steps:
step S10: detecting whether parts driven by the vehicle controller are matched with electrical parameters of the vehicle controller, if so, sending an instruction for enabling a high-side driving port not to be enabled to the vehicle controller through a high-side data line connected with the vehicle controller, controlling a first relay to be disconnected, and reading a fault code sent by the vehicle controller;
step S20: and the low-level data line connected with the whole vehicle controller sends an instruction for disabling the low-side driving port to the whole vehicle controller, controls the second relay to be disconnected, and reads a fault code sent by the whole vehicle controller.
7. The detection method according to claim 6, wherein said step S10 is followed by comprising:
step S11: sending an instruction enabling a high-side driving port to the vehicle controller, controlling a first relay to be closed, and reading a fault code sent by the vehicle controller;
the step S20 includes the following steps:
step S21: and sending an instruction for enabling the low-side driving port to the vehicle controller, controlling the second relay to be closed, and reading a fault code sent by the vehicle controller.
8. The detecting method according to claim 7, wherein the steps S11 and S21 are followed by: and after a preset cycle period, reading whether the fault code is erased from the memory of the whole vehicle controller.
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| CN201711100724.3A CN107908176B (en) | 2017-11-09 | 2017-11-09 | Vehicle control unit driving port detection device and detection method thereof |
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| CN201711100724.3A CN107908176B (en) | 2017-11-09 | 2017-11-09 | Vehicle control unit driving port detection device and detection method thereof |
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| WO2020037465A1 (en) * | 2018-08-20 | 2020-02-27 | 深圳配天智能技术研究院有限公司 | Signal detection circuit and in-vehicle computer |
| CN111123151A (en) * | 2019-12-26 | 2020-05-08 | 东软睿驰汽车技术（沈阳）有限公司 | Fault detection circuit and fault detection method |
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|---|---|---|---|---|
| WO2008045684A2 (en) * | 2006-10-05 | 2008-04-17 | Renesas Technology Corp. | Squib driver circuit diagnostic system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9702937B2 (en) * | 2015-02-17 | 2017-07-11 | Lg Chem, Ltd. | Contactor control system |
| CN105388881B (en) * | 2015-11-04 | 2017-10-20 | 北京长城华冠汽车科技股份有限公司 | The fault detect display device and method of a kind of entire car controller |
| CN105459929A (en) * | 2015-11-26 | 2016-04-06 | 普华基础软件股份有限公司 | Vehicle control system |
| CN106814723B (en) * | 2015-11-27 | 2020-12-18 | 长城汽车股份有限公司 | Testing device and testing system of vehicle control unit |
| CN106444721A (en) * | 2016-11-21 | 2017-02-22 | 南京越博动力系统股份有限公司 | Hardware-in-the-loop test system for whole vehicle controller for electric vehicle and test method |
| CN206388061U (en) * | 2016-12-20 | 2017-08-08 | 宝沃汽车（中国）有限公司 | Entire car controller failure is automatically injected device and test system |
| CN107132796B (en) * | 2017-05-25 | 2019-02-12 | 成都雅骏新能源汽车科技股份有限公司 | The pure electric vehicle controller device of integrated wireless communications and positioning |
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| WO2008045684A2 (en) * | 2006-10-05 | 2008-04-17 | Renesas Technology Corp. | Squib driver circuit diagnostic system and method |
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