CN214795694U - ECU offline detection device - Google Patents
ECU offline detection device Download PDFInfo
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- CN214795694U CN214795694U CN202120003481.7U CN202120003481U CN214795694U CN 214795694 U CN214795694 U CN 214795694U CN 202120003481 U CN202120003481 U CN 202120003481U CN 214795694 U CN214795694 U CN 214795694U
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Abstract
The utility model provides an off-line detection device of ECU, which comprises a control device, a detection device and a collection and analysis device; the detection equipment comprises a pull-up resistor detection mechanism and a pull-down resistor detection mechanism; the pull-up resistor detection mechanism and the pull-down resistor detection mechanism are respectively connected with the control equipment; the acquisition and analysis equipment is connected with the common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism. In the scheme, a first voltage signal of a pull-down resistor in a pin channel is detected by a pull-down resistor detection mechanism, and a second voltage signal of a pull-up resistor in the pin channel is detected by a pull-up resistor detection mechanism; the collecting and analyzing device collects a first voltage signal and a second voltage signal corresponding to each pin channel, compares a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and compares a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection and analysis message of the ECU, so that whether the ECU is abnormal or not can be determined.
Description
Technical Field
The utility model relates to a ECU handles technical field, especially relates to a ECU's detection device that rolls off production line.
Background
An electronic control unit ECU in the engine is a core control element of the electronic control engine, and not only can the electronic control unit ECU receive signals of an external sensor through a channel of a pin, but also the electronic control unit ECU processes and analyzes the signals through an internal pull-up resistor and a pull-down resistor, and sends out corresponding control instructions to control elements of the engine to execute corresponding operations.
In order to avoid the influence on the running of an engine caused by the abnormality of the electronic control unit ECU, repair personnel use a universal meter to detect the resistance values of the ECU pin lines one by one to judge the fault reason and the fault position when the electronic control unit ECU is off line regularly, so as to determine whether the electronic control unit ECU is abnormal or not. The mode of detecting the resistance of ECU pin circuit one by one manually is time-consuming and labor-consuming, and the efficiency is extremely low. Therefore, how to provide an ECU offline detection device, whether the resistance of quick and efficient detection ECU pin circuit exists unusually in order to confirm the electrical control unit ECU is the embodiment of the utility model provides a problem that awaits solution urgently.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides an offline detection device for an ECU to solve the problems existing in the prior art that time and labor are wasted and the efficiency is extremely low.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the embodiment of the utility model provides a pair of ECU's detection device that rolls off production line, ECU's detection device that rolls off production line includes: the device comprises a control device, a detection device and a collection and analysis device;
the detection equipment comprises a pull-up resistor detection mechanism and a pull-down resistor detection mechanism;
the pull-up resistor detection mechanism is connected with the pull-down resistor detection mechanism;
the pull-up resistor detection mechanism and the pull-down resistor detection mechanism are respectively connected with the control equipment;
the common connection end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism is connected with a pin of the ECU, the pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and the pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel;
the acquisition and analysis equipment is connected with a common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism, and acquires the first voltage signal and the second voltage signal; and comparing the voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and comparing the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection analysis message of the ECU.
Optionally, the pull-down resistance detection mechanism includes: a first resistor and a first triode;
one end of the first resistor is connected with a first power supply, and the other end of the first resistor is connected with the drain end of the first triode;
the source end of the first triode is connected with the pull-up resistance detection mechanism, and the gate end of the first triode is connected with the control equipment;
the source end of the first triode is connected with the common connection end of the pull-up resistor detection mechanism and the pin of the electronic control unit ECU, and the pull-down resistor detection mechanism is conducted when receiving a detection instruction of a pull-down resistor in a pin channel triggered by the control equipment and detects a first voltage signal of the resistor in the pin channel in real time.
Optionally, the pull-up resistance detection mechanism includes: a second resistor and a second triode;
one end of the second resistor is connected with the pull-down resistor detection mechanism, and the other end of the second resistor is connected with the drain end of the second triode;
the source end of the second triode is grounded, and the gate end of the second triode is connected with the control equipment;
and the pull-down resistor detection mechanism is connected with a common connecting end of the second resistor and a pin of the electronic control unit ECU, is switched on when receiving a detection instruction of a pull-up resistor in a pin channel triggered by the control equipment, and detects a second voltage signal of the pull-up resistor in the pin channel in real time.
Optionally, the voltage value of the first power supply includes 5V.
Optionally, the acquisition and analysis device includes a data acquisition mechanism and a data analysis mechanism;
the common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism is connected with the data acquisition mechanism, and the data acquisition mechanism is connected with the data analysis mechanism;
the data acquisition mechanism acquires the first voltage signal and the second voltage signal and sends the first voltage signal and the second voltage signal to the data analysis mechanism;
and the data analysis mechanism compares the first voltage signal with a preset pull-down voltage range and compares the second voltage signal with a preset pull-up voltage range to generate a detection analysis message of the ECU.
Optionally, the method further includes: an alarm device;
the alarm device is connected with the acquisition and analysis device, and outputs alarm information when the data analysis mechanism determines that the voltage value corresponding to the first voltage signal is not within a preset pull-down voltage range and/or the voltage value corresponding to the second voltage signal is not within a preset pull-up voltage range.
Optionally, the precision of the resistance values of the pull-down resistor in the pin channel and the pull-up resistor in the pin channel is ± 1%.
Based on the above, the embodiment of the utility model provides a pair of ECU's detection device that rolls off production line, this ECU's detection device that rolls off production line includes: the device comprises a control device, a detection device and a collection and analysis device; the detection equipment comprises a pull-up resistor detection mechanism and a pull-down resistor detection mechanism; the pull-up resistor detection mechanism is connected with the pull-down resistor detection mechanism; the pull-up resistor detection mechanism and the pull-down resistor detection mechanism are respectively connected with the control equipment; the common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism is connected with a pin of an Electronic Control Unit (ECU), the pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel in real time, and the pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel in real time; the acquisition and analysis equipment is connected with the common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism, and acquires a first voltage signal and a second voltage signal; and comparing the voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and comparing the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection analysis message of the ECU. In an embodiment of the present invention, a pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and a pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel; the collecting and analyzing device collects a first voltage signal and a second voltage signal corresponding to each pin channel of the ECU, compares a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and compares a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection and analysis message of the ECU, so that whether the ECU is abnormal or not can be determined.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an offline detection device of an ECU according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an offline detection device of an ECU according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another offline detection device of an ECU according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In an embodiment of the present invention, a pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and a pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel; the collecting and analyzing device collects a first voltage signal and a second voltage signal corresponding to each pin channel of the ECU, compares a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and compares a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection and analysis message of the ECU, so that whether the ECU is abnormal or not can be determined.
Referring to fig. 1, for the utility model provides a ECU's offline detection device's schematic structure diagram, this ECU's offline detection device includes: a control device 10, a detection device 20 and an acquisition and analysis device 30.
The detection device 20 includes a pull-up resistance detection mechanism 21 and a pull-down resistance detection mechanism 22.
The pull-up resistance detection means 21 is connected to the pull-down resistance detection means 22.
The pull-up resistance detection mechanism and the pull-down resistance detection mechanism are connected to the control device 10, respectively.
The collection and analysis device 30 is connected to a common connection terminal of the pull-up resistance detection mechanism 21 and the pull-down resistance detection mechanism 22.
A common connection end of the pull-up resistance detection mechanism and the pull-down resistance detection mechanism is connected to a pin 40 of an Electronic Control Unit (ECU), specifically, the common connection end of the pull-up resistance detection mechanism and the pull-down resistance detection mechanism is connected to an input pin corresponding to the pin 40 of the ECU, that is, the common connection end of the pull-up resistance detection mechanism and the pull-down resistance detection mechanism is connected to a pin channel of the ECU.
The number of the pins 40 of the ECU is plural.
The pins 40 of the plurality of ECUs include a pin 41 and a pin 42.
Wherein the value range of N is a positive integer greater than or equal to 1.
In a particular implementation, the resistors within the pin channel of the ECU include pull-up resistors and pull-down resistors.
The pull-up resistor is to pull up the resistor of the indeterminate signal in the pin channel 40 of the ECU to a high level.
Optionally, when the resistor in the pin channel is clamped to a high level by a pull-up clamp, the resistor in the pin channel is a pull-up resistor, and the ECU is internally pulled up to the second power supply Vb, that is, the resistor in the pin channel of the ECU is connected to the second power supply Vb.
The second power supply Vb is a power supply inside the ECU and is used for supplying electric power to the ECU.
Pull-down resistance refers to the resistance that pulls down an indeterminate signal in the pin channel 40 of the ECU to a low level.
Optionally, when the resistor in the pin channel is pulled down to a low level, the resistor in the pin channel is a pull-down resistor, and the inside of the ECU is pulled down to the ground, that is, the resistor in the pin channel of the ECU is connected to the ground.
Note that the second power Vb is 5V.
The pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in the pin channel in real time.
It should be noted that, the resistance value of the pull-up resistor of the pin channel of the ECU and the resistance value of the pull-down resistor of the pin channel of the ECU are calibrated and stored in the ECU in advance. Such as: the resistance of the pull-down resistor of the pin channel of the ECU may be pulled down by 100K.
Optionally, the precision of the resistance values of the pull-down resistor in the pin channel and the pull-up resistor in the pin channel is ± 1%.
Furthermore, the resistance precision of the pull-down resistor in the pin channel is +/-1%, so that the resistance range of the pull-down resistor is 99-101 k.
In a specific implementation, when receiving a detection instruction of the pull-down resistor, the pull-down resistor detection mechanism 22 detects a resistance signal of the pull-down resistor of each pin channel, and converts the resistance signal into a first voltage signal for collection.
Optionally, before the pull-down resistor detection mechanism 22 performs detection, the control device 10 needs to send a detection request message of the pull-down resistor to the ECU, so that the ECU switches the resistance of the pin channel to the pull-down resistor attribute according to the detection request message of the pull-down resistor. When receiving the switching completion sent by the ECU, the control device 10 sends a detection instruction of the pull-down resistor in the pin channel to the pull-down resistor detection mechanism 22 to control the pull-down resistor detection mechanism 22 to be turned on.
The pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel in real time.
In a specific implementation, when receiving a detection instruction of the pull-up resistor, the pull-up resistor detection mechanism 21 detects a resistor signal of the pull-up resistor of each pin channel, and converts the resistor signal into a second voltage signal for collection.
Optionally, after the detection by the pull-down resistance detection mechanism 22 is completed and before the detection by the pull-up resistance detection mechanism 10 is performed, the control device 10 needs to send a detection request message of the pull-up resistance to the ECU, so that the ECU switches the resistance in the pin channel to the pull-up resistance attribute according to the detection request message of the pull-up resistance. The control device 10, upon receiving the switching completion sent by the ECU, sends a detection instruction of the pull-up resistor in the pin channel to the pull-up resistor detection mechanism 22 to control the pull-up resistor detection mechanism 21 to be turned on.
The embodiment of the utility model provides an in, the pull-down resistance to all pin passageways based on the aforesaid shows is unified earlier and is detected, then unified again to all pin passageways pull up the mode that the resistance detected, can also detect the pull-down resistance of each pin passageway one by one.
With continued reference to fig. 1, the collection and analysis device 30 collects a first voltage signal and a second voltage signal; and comparing the voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and comparing the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection analysis message of the ECU.
In a specific implementation, the collecting and analyzing device 30 collects a first voltage signal and a second voltage signal of each pin channel; for each pin channel, comparing the voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and comparing the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value, whether the pin channel corresponding to the first voltage signal and the second voltage signal is in fault can be determined. And generating a detection analysis message of the ECU based on the comparison result of the first voltage signal and the second voltage signal of each pin channel.
It should be noted that the preset pull-down voltage range is set according to the accuracy of the resistance value of the pull-down resistor, and the preset pull-up voltage range is set according to the accuracy of the resistance value of the pull-up resistor.
It should be further noted that the detection analysis message of the ECU is used to indicate whether there is an abnormality in the hardware of the ECU.
In an embodiment of the present invention, a pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and a pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel; the collecting and analyzing device collects a first voltage signal and a second voltage signal corresponding to each pin channel of the ECU, compares a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and compares a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection and analysis message of the ECU, so that whether the ECU is abnormal or not can be determined.
Optionally, based on the offline detection device of the ECU shown above, the embodiment of the present invention further shows the specific structures of the pull-up resistance detection mechanism 21, the pull-down resistance detection mechanism 22 and the collection and analysis device 30, as shown in fig. 2.
The pull-down resistance detection mechanism 22 includes a first resistor R1 and a first transistor M1.
One end of the first resistor R1 is connected to the first power source Va, and the other end of the first resistor R1 is connected to the drain of the first transistor M1.
The source terminal of the first transistor M1 is connected to the pull-up resistance detection mechanism 21, and the gate terminal of the first transistor M1 is connected to the control device 10.
The source end of the first triode M1 and the common connection end of the pull-up resistance detection mechanism 21 are connected with the pin of the electronic control unit ECU.
The pull-up resistance detection mechanism 21 includes a second resistor R2 and a second transistor M2.
One end of the second resistor R2 is connected to the pull-down resistor detection mechanism 22, and the other end of the second resistor R2 is connected to the drain of the second transistor M2.
The source terminal of the second transistor M2 is grounded, and the gate terminal of the second transistor is connected to the control device 10.
The common connection end of the pull-down resistance detection mechanism 22 and the second resistor R2 is connected with a pin of the electronic control unit ECU.
In a specific implementation, a source terminal of the first transistor M1 is connected to the second resistor R2. The source end of the first triode M1 and the common connection end of the pull-up resistance detection mechanism 21 are connected with the pin of the electronic control unit ECU.
Alternatively, the voltage value of the first power source Va includes 5V.
It should be noted that the pull-up resistance detection mechanism 21 and the pull-down resistance detection mechanism 22 each include a processor (not shown in the figure) for processing data and collecting voltage signals.
The pull-down resistor detection mechanism 22 is turned on when receiving a detection instruction of the pull-down resistor in the pin channel triggered by the control device 10, and detects a first voltage signal of the resistor in the pin channel in real time.
In a specific implementation, when the pull-down resistance detection mechanism 22 receives that the gate terminal of the first transistor M1 is at a high level by the control device 10, the pull-down resistance detection mechanism 22 is turned on, and the pull-up resistance detection mechanism 21 is turned off, at this time, the first resistor R1 is connected in series with a resistor in the pin channel, that is, the first resistor R1 divides voltage with the resistor in the pin channel. The processor in the pull-down resistor detection mechanism 22 calculates the voltage value V corresponding to the resistor in the pin channel by substituting the resistance values of the first resistor R1, the first power supply Va and the pull-down resistor into the formula (1)Collecting. And the obtained voltage value V isCollectingConverted into a first voltage signal.
Formula (1):
Vcollecting＝Va*RTo be measured/(R1+RTo be measured) (1)
Wherein R isTo be measuredAnd the resistance value of the pull-down resistor is calibrated in advance for the pin channel of the ECU.
The pull-up resistor detection mechanism 21 is turned on when receiving a detection instruction of the pull-up resistor in the pin channel triggered by the control device 10, and detects a second voltage signal of the pull-up resistor in the pin channel in real time.
In a specific implementation, when the pull-up resistance detection mechanism 21 receives that the gate terminal of the second transistor M2 is at a high level by the control device 10, the pull-up resistance detection mechanism 22 is turned on, and the pull-down resistance detection mechanism 22 is turned off, at this time, the second resistor R2 is connected in series with the resistor in the pin channel, that is, the second resistor R2 divides the voltage with the resistor in the pin channel. The processor in pull-up resistance detection mechanism 21 calculates based on the resistance values of second resistor R2, second power supply Vb, and pull-up resistor substituted into formula (2)Obtaining a voltage value V corresponding to the resistance in the pin channelCollecting. And the obtained voltage value V isCollectingConverted into a second voltage signal.
Formula (2):
Vcollecting＝Vb*R2/(R2+RTo be measured) (2)
Wherein R isTo be measuredAnd the resistance value of the pull-down resistor is calibrated in advance for the pin channel of the ECU.
With continued reference to fig. 2, acquisition analysis device 30 includes a data acquisition mechanism 31 and a data analysis mechanism 32.
The common connecting end of the pull-up resistance detection mechanism 21 and the pull-down resistance detection mechanism 22 is connected with the data acquisition mechanism 31, and the data acquisition mechanism 31 is connected with the data analysis mechanism 32.
In a specific implementation, the common connection terminal of the source terminal of the first transistor M1 and the second resistor R2 is connected to the data acquisition mechanism 31, and the data acquisition mechanism 31 is connected to the data analysis mechanism 32.
The data acquisition mechanism 31 acquires the first voltage signal and the second voltage signal, and sends the first voltage signal and the second voltage signal to the data analysis mechanism 32.
In a specific implementation, the data acquisition mechanism 31 acquires the first voltage signal and the second voltage signal passed by each pin, and sends all the first voltage signals and the second voltage signals to the data analysis mechanism 32.
The data analysis mechanism 32 compares the voltage value corresponding to the first voltage signal with a preset issuing voltage range, and compares the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value, so as to produce a detection analysis message of the ECU.
In a specific implementation, for each pin channel, the data analysis mechanism 32 determines whether a voltage value corresponding to each first voltage signal is within a preset issuing voltage range, and determines whether a voltage value corresponding to each second voltage signal is within a preset upper generating voltage range; and packaging each judgment result to generate a detection analysis message of the ECU. Whether the pin channel has a fault can be determined based on the detection analysis message of the ECU. And then determines whether there is a failure in the hardware of the ECU.
In the embodiment of the present invention, when the pull-down resistance detection mechanism receives a high level of the gate terminal of the first triode from the control device, the pull-down resistance detection mechanism is turned on, and the pull-down resistance detection mechanism detects a first voltage signal of the pull-down resistance in the pin channel; when the pull-up resistor detection mechanism receives that the grid end of the second triode is at a high level by the control equipment, the pull-up resistor detection mechanism is conducted to detect a second voltage signal of the pull-up resistor in the pin channel; the data acquisition mechanism acquires a first voltage signal and a second voltage signal corresponding to each pin channel of the ECU, so that the data analysis mechanism can compare a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value and a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection analysis message of the ECU, and whether the ECU is abnormal can be determined.
Optionally, based on the above-mentioned embodiment of the present invention, the offline detection device of the ECU shown in fig. 2 is based on the offline detection device of the ECU disclosed above, as shown in fig. 3, further including: an alarm device 50.
The alarm device 50 is connected to the collecting and analyzing device 30, and the alarm device 50 outputs alarm information when the data analyzing mechanism 32 determines that the voltage value corresponding to the first voltage signal is not within the preset pull-down voltage range and/or the second voltage signal is not within the preset pull-up voltage range.
Specifically, the alarm device 50 is connected to the data analysis mechanism 32, and when the data analysis mechanism 32 determines that a voltage value corresponding to a first voltage signal of a certain pin channel is not within a preset pull-down voltage range and/or a voltage value corresponding to a second voltage signal corresponding to the first voltage signal is not within a preset pull-up voltage range, the alarm device 50 determines that the ECU is abnormal and outputs alarm information, so that a worker can start corresponding protective measures for the ECU based on the alarm information.
In an embodiment of the present invention, a pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and a pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel; the collecting and analyzing device collects a first voltage signal and a second voltage signal corresponding to each pin channel of the ECU, compares a voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and compares a voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection and analysis message of the ECU, so that whether the ECU is abnormal can be determined. And then remind the staff ECU to take place unusually to the staff starts corresponding safeguard measure to ECU based on alarm information.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An under-line detection device of an ECU, characterized by comprising: the device comprises a control device, a detection device and a collection and analysis device;
the detection equipment comprises a pull-up resistor detection mechanism and a pull-down resistor detection mechanism;
the pull-up resistor detection mechanism is connected with the pull-down resistor detection mechanism;
the pull-up resistor detection mechanism and the pull-down resistor detection mechanism are respectively connected with the control equipment;
the common connection end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism is connected with a pin of the ECU, the pull-down resistor detection mechanism detects a first voltage signal of a pull-down resistor in a pin channel, and the pull-up resistor detection mechanism detects a second voltage signal of a pull-up resistor in the pin channel;
the acquisition and analysis equipment is connected with a common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism, and acquires the first voltage signal and the second voltage signal; and comparing the voltage value corresponding to the first voltage signal with a preset pull-down voltage range value, and comparing the voltage value corresponding to the second voltage signal with a preset pull-up voltage range value to generate a detection analysis message of the ECU.
2. The apparatus of claim 1, wherein the pull-down resistance detection mechanism comprises: a first resistor and a first triode;
one end of the first resistor is connected with a first power supply, and the other end of the first resistor is connected with the drain end of the first triode;
the source end of the first triode is connected with the pull-up resistance detection mechanism, and the gate end of the first triode is connected with the control equipment;
the source end of the first triode is connected with the common connection end of the pull-up resistor detection mechanism and the pin of the ECU, and the pull-down resistor detection mechanism is conducted when receiving a detection instruction of a pull-down resistor in a pin channel triggered by the control equipment and detects a first voltage signal of the resistor in the pin channel in real time.
3. The apparatus of claim 1, wherein the pull-up resistance detection mechanism comprises: a second resistor and a second triode;
one end of the second resistor is connected with the pull-down resistor detection mechanism, and the other end of the second resistor is connected with the drain end of the second triode;
the source end of the second triode is grounded, and the gate end of the second triode is connected with the control equipment;
the common connecting end of the pull-down resistor detection mechanism and the second resistor is connected with a pin of the ECU, and the pull-up resistor detection mechanism is conducted when receiving a detection instruction of a pull-up resistor in a pin channel triggered by control equipment and detects a second voltage signal of the pull-up resistor in the pin channel in real time.
4. The apparatus of claim 2, wherein the voltage value of the first power supply comprises 5V.
5. The apparatus of claim 1, wherein the collection and analysis device comprises a data collection mechanism and a data analysis mechanism;
the common connecting end of the pull-up resistor detection mechanism and the pull-down resistor detection mechanism is connected with the data acquisition mechanism, and the data acquisition mechanism is connected with the data analysis mechanism;
the data acquisition mechanism acquires the first voltage signal and the second voltage signal and sends the first voltage signal and the second voltage signal to the data analysis mechanism;
and the data analysis mechanism compares the first voltage signal with a preset pull-down voltage range and compares the second voltage signal with a preset pull-up voltage range to generate a detection analysis message of the ECU.
6. The apparatus of claim 5, further comprising: an alarm device;
the alarm device is connected with the acquisition and analysis device, and outputs alarm information when the data analysis mechanism determines that the voltage value corresponding to the first voltage signal is not within a preset pull-down voltage range and/or the voltage value corresponding to the second voltage signal is not within a preset pull-up voltage range.
7. The apparatus of claim 1, wherein the pull-down resistors in the pin channel and the pull-up resistors in the pin channel have a resistance accuracy of ± 1%.
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|---|---|---|---|
| CN202120003481.7U CN214795694U (en) | 2021-01-04 | 2021-01-04 | ECU offline detection device |
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| CN202120003481.7U CN214795694U (en) | 2021-01-04 | 2021-01-04 | ECU offline detection device |
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2021
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