CN115436843A - Stitch sensor wire harness connection sequence detection method and system - Google Patents
Stitch sensor wire harness connection sequence detection method and system Download PDFInfo
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- CN115436843A CN115436843A CN202210689849.9A CN202210689849A CN115436843A CN 115436843 A CN115436843 A CN 115436843A CN 202210689849 A CN202210689849 A CN 202210689849A CN 115436843 A CN115436843 A CN 115436843A
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- sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
Abstract
The invention provides a method and a system for detecting the wiring harness connection sequence of a stitch sensor, comprising the following steps: under the condition that the system working condition of the sensor to be tested is normal, acquiring whether signals corresponding to any two pins exceed a normal range at the same time; if yes, and the times exceeding the normal range exceed a set threshold, the pin sensor is judged to have a fault of reverse connection, and accurate detection of the sequence of the pins of the sensor wiring harness is achieved.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to a stitch sensor wire harness connection sequence detection method and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
HC injection system: the system belongs to an engine and is used for receiving signals of an ECU (electronic control unit) and controlling fuel to be directly injected into an exhaust pipe. Comprises two kinds of control units (MU) and Injection Units (IU).
Control unit (MU): for controlling and metering fuel injected into the exhaust pipe. Injection Unit (IU): is mounted on the exhaust pipe, in front of the DPF, for injecting fuel. The HC injection system is equipped with an upstream pressure temperature sensor and a downstream pressure sensor.
At present, the general pins of the sensor have 2 pins, three pins, four pins and more, wherein 4 pins of the sensor are shown in figure 1, the pins are power supply pins, zero voltage pins, A signals and B signals, the sequence of the pins has specific requirements, and the four-pin sensor can report a response fault if a wiring harness is connected in a virtual mode or is disconnected or short-circuited, but does not report the fault if the sequence of the pins is reversed.
In addition, if the existing multi-pin sensor (for example, a 4-pin sensor) has a reverse pin sequence, the sensor is in a working state and cannot report a fault, which may result in inaccurate sensor signals. There are two reasons for the abnormal signal of the sensor signal measurement, one of which is: because the stitch turns over in order and causes the signal that the sensor measures to be inaccurate, it is second: the measured object does have a fault in the present application. Based on this, it will not be possible to identify the source of the fault.
Therefore, how to identify whether the stitch sequence of the multi-needle sensor is reversed is a key problem of whether the sensor can work normally.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for detecting the connection sequence of a pin sensor wire harness, which can detect whether the pin sensor wire harness is in a reverse connection state or not.
In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
in a first aspect, a method for detecting the connection sequence of a wiring harness of a stitch sensor is disclosed, which comprises the following steps:
under the condition that the system working condition of the sensor to be tested is normal, acquiring whether signals corresponding to any two pins exceed a normal range at the same time;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
According to the further technical scheme, when the condition that the system working condition of the sensor to be detected is normal is judged, the method specifically comprises the following steps:
when the system is powered on and the engine is not started, the sensor supplies power and normally measures at the moment, and when no other fault occurs, the working condition of the system is judged to be normal.
According to a further technical scheme, the method for detecting the wiring harness connection sequence of the pin sensor is suitable for a sensor at least comprising two pins.
According to the further technical scheme, when the pin sensor is a four-pin sensor, pins are a power supply pin, a zero-voltage pin, a signal A and a signal B, and during detection, the value of the signal A is obtained and judged whether to be in a normal range, and the value of the signal B is obtained and judged whether to be in the normal range; if both are exceeded, the number of times is accumulated.
According to the further technical scheme, if the accumulated times are larger than the calibration limit value, the pins of the four-pin sensor are pushed to be in reverse connection failure.
In a second aspect, a stitch sensor harness connection sequence detection system is disclosed, comprising:
the controller is connected with the sensor to be detected;
the controller obtains whether signals corresponding to any two pins exceed a normal range simultaneously under the condition that the system working condition of the sensor to be detected is normal;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
According to the technical scheme, the controller is a controller of a system where the sensor to be detected is located or a controller which is independently used for detecting the wiring harness connection sequence of the stitch sensor.
According to the technical scheme, the controller can be simultaneously connected with a plurality of sensors to be detected, and whether faults of reverse connection in sequence exist in the sensors is judged according to the signal condition of each sensor.
The above one or more technical solutions have the following beneficial effects:
according to the invention, the two corresponding signals are compared with the actual normal range value during electrification, if the two signals do not accord with the actual normal range value, the reverse connection of the wiring harness sequence is judged, and a fault is reported, so that the accurate detection of the wiring harness stitch sequence of the sensor is realized.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a pin structure of a four-pin sensor according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Interpretation of related terms:
an ECU: the electronic engine control unit is a controller that performs calculation, processing, and judgment based on signals input from the sensors, and outputs commands to control the operation of the actuator.
A sensor: the electric appliance parts for measuring a certain semaphore have various pin types, and a responding wiring harness is connected to the pins responded by the ECU.
Example one
The embodiment discloses a method for detecting the connection sequence of a wiring harness of a pin sensor, which comprises the following steps:
under the condition that the system working condition of the sensor to be tested is normal, acquiring whether signals corresponding to any two pins exceed a normal range at the same time;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
Wherein, the normal condition of system operating mode of sensor that awaits measuring is located when judging, specifically is:
when the system is powered on and the engine is not started, the sensor supplies power and normally measures at the moment, and when no other fault occurs, the working condition of the system is judged to be normal.
For example, if the power-on value of T15 is greater than the calibration value, the engine speed is less than the calibration value, and the system has no related fault, it is determined that the system is in a normal operating condition. This corresponds to the engine being normally powered up but not rotating and also not malfunctioning.
The method for detecting the wiring harness connection sequence of the stitch sensor is suitable for the sensor at least comprising two stitches, and can be a sensor with 2 needles, three needles, four needles and more stitches.
According to the related sensor of the engine, different pins can output different signal values, the normal signal output value is within a certain range, and particularly when the T15 is electrified but the engine is not started, if the multi-pin sensor is reversely connected or is connected in error, the signal output value can exceed the range; the signal output value can be obtained by reading ECU-related parameters of the engine.
In a possible mode, referring to fig. 2, when the pin sensor is a four-pin sensor, the pins are a power supply pin, a zero voltage pin, an a signal and a B signal, and during detection, the value of the signal a is obtained and is judged to be in a normal range, and the value of the signal B is obtained and is judged to be in a normal range; if both are exceeded, the number of times is accumulated.
And if the accumulated times are larger than the calibration limit value, pushing the four-pin sensor to have the reverse fault of the pin sequence connection.
Within the time range of the calibration value; the pushed fault can be displayed on the instrument in the form of a fault code, so that subsequent monitoring and maintenance are facilitated.
Example two
The object of this embodiment is to provide a stitch sensor wire harness connection sequence detection system, which includes:
the controller is connected with the sensor to be detected;
the controller obtains whether signals corresponding to any two pins exceed a normal range simultaneously under the condition that the system working condition of the sensor to be detected is normal;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
The controller is the controller of the system where the sensor to be detected is located or the controller which is used for detecting the wiring harness connection sequence of the stitch sensor independently.
The controller can be simultaneously connected with a plurality of sensors to be tested, and whether faults with reverse connection in sequence exist in the sensors is respectively judged according to the signal condition of each sensor.
EXAMPLE III
An object of the present embodiment is to provide an HC injection system, which is characterized in that the system is equipped with a plurality of sensors to be tested, and the plurality of sensors to be tested perform the detection of the connection sequence of the wire harness according to the method in the first embodiment.
Or the system comprises a control unit, and the control unit is connected with the sensor to be detected;
the control unit obtains whether signals corresponding to any two pins exceed a normal range simultaneously under the condition that the system working condition of the sensor to be detected is normal;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive changes in the technical solutions of the present invention.
Claims (10)
1. A method for detecting the wiring harness connection sequence of a stitch sensor is characterized by comprising the following steps:
under the condition that the system working condition of the sensor to be tested is normal, whether signals corresponding to any two pins exceed a normal range simultaneously is obtained;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
2. The method for detecting the wiring harness connection sequence of the stitch sensor as claimed in claim 1, wherein when the condition that the system working condition of the sensor to be detected is normal is determined, the method specifically comprises the following steps:
when the system is powered on and the engine is not started, the sensor supplies power and measures normally, and when no other fault occurs, the working condition of the system is judged to be normal.
3. The method as claimed in claim 1, wherein the method is applied to a sensor having at least two pins.
4. The method as claimed in claim 1, wherein when the pin sensors are four pins, the pins are power pins, zero voltage pins, a signal A, and a signal B, and when detecting, the value of the signal A is obtained and judged to be within a normal range, and the value of the signal B is obtained and judged to be within a normal range; if both are exceeded, the number of times is accumulated.
5. The method as claimed in claim 1, wherein if the accumulated number of times is greater than a calibration limit, the four-pin sensor is pushed to have a failure in reverse connection of the pin sequence.
6. A stitch sensor wire harness connection sequence detection system is characterized by comprising:
the controller is connected with the sensor to be detected;
the controller obtains whether signals corresponding to any two pins exceed a normal range simultaneously under the condition that the system working condition of the sensor to be detected is normal;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
7. The system as claimed in claim 6, wherein the controller is a controller of a system in which the sensor to be tested is located or a controller for separately detecting the connection sequence of the pin sensor.
8. The system as claimed in claim 6, wherein the controller is capable of accessing a plurality of sensors to be tested simultaneously, and determining whether there is a failure of reverse connection according to the signal condition of each sensor.
An hc spray system, characterized in that the system is equipped with a plurality of sensors under test, which perform harness connection sequence detection according to the method of any one of claims 1 to 5.
The HC injection system is characterized by comprising a control unit, wherein the control unit is connected with a sensor to be tested;
the control unit obtains whether signals corresponding to any two pins exceed a normal range simultaneously under the condition that the system working condition of the sensor to be detected is normal;
if yes, and the times exceeding the normal range exceed a set threshold, judging that the stitch sensor has a fault of reverse connection in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689849.9A CN115436843A (en) | 2022-06-17 | 2022-06-17 | Stitch sensor wire harness connection sequence detection method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210689849.9A CN115436843A (en) | 2022-06-17 | 2022-06-17 | Stitch sensor wire harness connection sequence detection method and system |
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| CN115436843A true CN115436843A (en) | 2022-12-06 |
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| CN202210689849.9A Pending CN115436843A (en) | 2022-06-17 | 2022-06-17 | Stitch sensor wire harness connection sequence detection method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299071A (en) * | 2023-05-18 | 2023-06-23 | 天津博益气动股份有限公司 | Pressure sensor prevents wrong line detection circuitry that connects |
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2022
- 2022-06-17 CN CN202210689849.9A patent/CN115436843A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299071A (en) * | 2023-05-18 | 2023-06-23 | 天津博益气动股份有限公司 | Pressure sensor prevents wrong line detection circuitry that connects |
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