CN218383733U

CN218383733U - Signal jump fault simulation device

Info

Publication number: CN218383733U
Application number: CN202222266231.XU
Authority: CN
Inventors: 张志辉; 宫宝利; 胡君; 徐划龙; 秦金龙; 刘明; 陈磊
Original assignee: China Automotive Engineering Research Institute Co Ltd
Current assignee: China Automotive Engineering Research Institute Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-01-24
Anticipated expiration: 2032-08-26

Abstract

The utility model relates to the technical field of test simulation devices, and discloses a signal jump fault simulation device, which comprises a power supply, a signal generation module, a signal output module and a signal verification module; the signal generation module comprises an analog circuit and a controller; the controller is used for controlling the analog circuit to operate and output an initial signal; the signal output module is used for converting the initial signal into a jump signal and outputting the jump signal; the signal verification module comprises a comparator and a confirmation keyboard; the comparator is electrically connected with the signal output module and the controller; the comparator is used for comparing the hopping signal with the reference signal, and is also used for sending an adjusting signal to the controller when the difference value between the hopping signal and the reference signal is greater than a threshold value; the controller is also used for adjusting the parameters of the analog circuit; the confirmation keyboard is used for starting and stopping the controller. The utility model discloses can carry out signal jump fault simulation betterly, and install and be convenient for open and stop, signal output is reliable.

Description

Signal jump fault simulation device

Technical Field

The utility model relates to an experimental analogue means technical field, concretely relates to signal jump fault simulation device.

Background

The sensor is used as an important component of an automobile engine electric control system, the sensor is a signal input end for providing various important information for an engine module ECM, and if the sensor has faults such as abnormity, failure and the like, the ECM cannot receive or receives wrong information to cause serious consequences on the control of the engine. Therefore, it is important to correctly diagnose a fault of a sensor of an electronically controlled engine.

Among them, an Engine Coolant Temperature sensor (ECT) is located on a water passage of an Engine cylinder head, a cylinder block, or a water pipe, and is generally mounted on a thermostat housing. The coolant temperature sensor is used to monitor the temperature of the engine coolant and to supply this temperature signal as a temperature signal of the engine to the engine control module ECM, which carries out the following controls, including the control of the injected quantity, the correction of the injected quantity, the idle speed control, the control of the cooling fan, the open-loop and closed-loop control of the mixer, etc., on the basis of this signal. If the coolant temperature sensor breaks down and the temperature signal output by the coolant temperature sensor is wrong, the control content is affected, and the operation of the automobile is very unfavorable. In contrast, an OBD system (i.e., an on-board automatic diagnostic system) on a vehicle diagnoses a fault condition including a sensor fault, and when the coolant temperature sensor is diagnosed, if a temperature signal transmitted from the coolant temperature sensor exceeds a maximum threshold value and a minimum threshold value for a certain number of sensor voltage jumps within a certain time after the engine is started, the OBD system can diagnose and confirm that the coolant temperature sensor has a jump fault, and complete fault diagnosis.

Furthermore, in order to ensure the reliability and accuracy of the OBD system diagnosis and avoid the problem that the sensor fault continuously affects the vehicle operation due to the failure of the OBD system diagnosis, it is necessary to verify the fault diagnosis function. In a conventional fault diagnosis verification test, since a jump fault environment of the coolant temperature sensor needs to be constructed, a jump voltage of the sensor needs to be simulated. Conventionally, a manual control signal generator is used to generate a jump voltage, and a coolant temperature signal fed back to a control unit is adjusted to simulate signal jump. However, the manual control signal jumps, so that a person is required to accurately control the signal jumps in a diagnosis window period, the efficiency is low, the manual operation easily misses the diagnosis window period, and the jump signal does not reach a threshold value, so that the diagnosis verification test fails. Moreover, if the jump signal is output incorrectly, the personnel cannot sense the jump signal in time, and the signal output is unreliable.

SUMMERY OF THE UTILITY MODEL

The utility model provides a signal jump fault simulation device can carry out signal jump fault simulation better, and the device is convenient for open and stop, and signal output is reliable.

The utility model provides a basic scheme does: a signal jump fault simulation device comprises a power supply; the device also comprises a signal generating module, a signal output module and a signal verifying module; the signal generation module comprises an analog circuit and a controller; the controller is used for controlling the analog circuit to operate and output an initial signal; the controller, the analog circuit and the signal output module are electrically connected; the signal output module is used for converting the initial signal into a hopping signal and outputting the hopping signal;

the signal verification module comprises a comparator and a confirmation keyboard; the comparator is electrically connected with the signal output module and the controller; the comparator is used for comparing the hopping signal with the reference signal, and is also used for sending an adjusting signal to the controller when the difference value between the hopping signal and the reference signal is greater than a threshold value; the controller is also used for adjusting the parameters of the analog circuit; the confirmation keyboard is electrically connected with the controller and is used for starting and stopping the controller.

The utility model discloses a theory of operation and advantage lie in: the signal generation module generates an initial signal and outputs the initial signal to the signal output module, the signal output module further converts the initial signal into a jump signal and outputs the jump signal, and the jump signal can be simulated to be used as a jump fault signal of the automobile sensor and fed back to a control unit of the automobile, so that a test environment for diagnosing and verifying the jump fault of the sensor signal is constructed. The device can well simulate the signal jump fault and is beneficial to providing test preconditions for the verification of an OBD system and the like.

In addition, in the output process of the jump signal, the signal verification module can compare and verify the output jump signal, and sends an adjusting signal to the controller when the jump signal is abnormal (when the difference value between the jump signal and the reference signal is greater than a threshold value), and the controller can further adjust the parameters of the analog circuit, adjust the output jump signal in time and ensure the long-term reliability of the output jump signal. In addition, a confirmation keyboard is further arranged in the device, the controller is convenient to control the whole device to start and stop, and the operation is convenient.

Further, the device also comprises an alarm; the alarm is electrically connected with the controller; the controller is also used for starting the alarm when receiving the adjusting signal.

Has the advantages that: the alarm can give an alarm in time when the signal output has problems so as to facilitate the timely processing of testers.

Further, the alarm is a buzzer.

Has the advantages that: adopt bee calling organ to carry out audible alarm, compare in the vision class warning of warning light class, audible alarm is changeed in being perceived by the people, and warning effect is better.

Further, the controller is a single chip microcomputer.

Has the advantages that: the single chip microcomputer is simple in structure, good in control effect and simple in structure of the whole device.

Further, a timer is also included; the timer is used for measuring the total output time of the jump signal and the interval time of the adjacent two jump signal outputs.

Has the advantages that: the total output time and the signal output interval time of the jump signal are measured, and data reference can be provided for subsequent analysis and adjustment of signal output frequency and the like.

Further, the device also comprises a display; the display is used for displaying the total output time of the jump signal and the jump signal parameter.

Has the advantages that: the relevant data of the hopping signal is visually displayed, so that the hopping signal is convenient for a tester to observe, and the using experience of people is better.

Furthermore, a backlight source is arranged on the confirmation keyboard.

Has the advantages that: in a dim use scene, the backlight source can help testers to identify and confirm the key positions of the keyboard, and the operation experience is better.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the signal jump fault simulation apparatus of the present invention.

Detailed Description

The following is further detailed by the specific embodiments:

the first embodiment is as follows:

the embodiment is basically as shown in the attached figure 1: a signal jump fault simulation device comprises a power supply, a signal generation module, a signal output module, a signal verification module and an alarm; the signal generation module comprises an analog circuit and a controller; the controller is used for controlling the analog circuit to operate and output an initial signal; the controller, the analog circuit and the signal output module are electrically connected; the signal output module is used for converting the initial signal into a hopping signal and outputting the hopping signal; the power supply is used for supplying power to the whole signal jump fault simulation device, and a conventional 5V power supply can be adopted in the embodiment. Specifically, the controller is a single chip microcomputer, and an STC89C52 type single chip microcomputer can be used as the controller in this embodiment. The signal output module can adopt a conventional converter to convert an initial signal and a jump signal, and specifically, the jump signal is a jump voltage signal; the initial signal is an electrical signal or a digital signal.

The signal verification module comprises a comparator and a confirmation keyboard; the comparator is electrically connected with the signal output module and the controller; the comparator is used for comparing the hopping signal with the reference signal, and is also used for sending an adjusting signal to the controller when the difference value between the hopping signal and the reference signal is greater than a threshold value; the controller is further configured to adjust the analog circuit parameter, and specifically, the controller adjusts the analog circuit parameter after receiving the adjustment signal sent by the comparator, so as to adjust the output transition signal value; the confirmation keyboard is electrically connected with the controller and is used for starting and stopping the controller. The alarm is electrically connected with the controller; the controller is also used for starting an alarm when receiving the adjusting signal. The alarm is a buzzer.

The signal jump fault simulation device provided by the embodiment can better simulate the signal jump fault, is convenient to start and stop, and is reliable in signal output. And the device has simple structure and is convenient to operate, regulate and control.

Example two:

a signal jump fault simulation device is additionally provided with a timer, a display and a backlight source on the basis of the first embodiment.

The timer and the display are electrically connected with the signal output module. The timer is used for measuring the total output time of the jump signal and the interval time of the adjacent two jump signal outputs. The display is used for displaying the total output time of the jump signal and the jump signal parameter. In particular, the display may be a conventional LED display. The hopping signal parameters include the size of the hopping signal, the frequency of the hopping signal output, and the like. The backlight source is arranged on the confirmation keyboard, and the setting mode of the backlight source is consistent with that of a conventional keyboard backlight source.

Compared with the first embodiment, the signal jump fault simulation device provided by the embodiment has the advantages that the display and the backlight source can provide better use experience for operators, the timer can provide data reference for subsequent analysis and adjustment of signal output frequency and the like, and the whole device is richer in function.

In addition, it should be additionally noted that the control contents of the programs related to the controller and the like in the above embodiments are all the control contents that can be realized by the existing programs.

The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A signal jump fault simulation device comprises a power supply; the device is characterized by also comprising a signal generation module, a signal output module and a signal verification module; the signal generation module comprises an analog circuit and a controller; the controller is used for controlling the analog circuit to operate and output an initial signal; the controller, the analog circuit and the signal output module are electrically connected; the signal output module is used for converting the initial signal into a jump signal and outputting the jump signal;

2. The signal transition fault simulation device of claim 1, further comprising an alarm; the alarm is electrically connected with the controller; the controller is also used for starting the alarm when receiving the adjusting signal.

3. The signal jump fault simulation device of claim 2, wherein the alarm is a buzzer.

4. The apparatus according to claim 1, wherein the controller is a single-chip microcomputer.

5. The signal transition fault simulation apparatus of claim 1, further comprising a timer; the timer is used for measuring the total output time of the jump signal and the interval time of the adjacent two jump signal outputs.

6. The signal transition fault simulation apparatus of claim 5, further comprising a display; the display is used for displaying the total output time of the jump signal and the jump signal parameter.

7. The apparatus of claim 6, wherein a backlight is provided on the confirmation keyboard.