CN102121834B - Detection method for throttle valve position sensor detection device - Google Patents

Abstract

The invention discloses a detection method of a throttle position sensor detection device, which is characterized in that it consists of a throttle position sensor static detection process and a throttle position sensor dynamic detection process. The effect of the invention is: the throttle signal is used as the judgment basis, and the throttle detection device added with the judgment function can realize the functions of the throttle position sensor entering the factory, loading location detection, and displaying the current opening and voltage value.

Description

Detection method of throttle position sensor detection device

technical field

The invention belongs to a throttle position sensor detection technology, in particular to a detection method of a throttle position sensor detection device for motorcycles.

Background technique

The throttle position sensor is used to monitor the throttle opening value and send the throttle opening value to the ECU. The ECU controls the air-fuel ratio based on information such as engine speed and throttle opening. To ensure that the engine works at the best air-fuel ratio.

Therefore, the reliability of the throttle position sensor is directly related to the accuracy of the air supply when the engine is working.

In the past, the detection method of the throttle position sensor was mostly the method of measuring resistance with a multimeter, or simple A/D conversion to display its voltage, and the detection personnel judged whether the throttle position sensor was qualified by themselves.

The disadvantage of the existing technology is that no matter the method of measuring resistance by multimeter or the method of A/D conversion to display voltage, these operations are too complicated, and the function is single, and composite data such as the ratio of rotation angle/voltage and the size of rotation angle cannot be monitored.

Contents of the invention

The problem to be solved by the present invention is to provide a detection method for the throttle position sensor detection device, which can quickly detect whether the valve position sensor is qualified, and can quickly realize the throttle position sensor entering the factory detection, loading positioning detection, and displaying the current opening and voltage. value.

In order to achieve the above object, the present invention provides a detection method for a throttle position sensor detection device, which is composed of a throttle position sensor static detection process and a throttle position sensor dynamic detection process,

The sensor static detection process adopts the following steps:

The quality inspection process of the sensor before loading,

Connect the no-load throttle position sensor detected by the factory with the first pin of the sensor socket;

The main control chip reads the throttle position signal of the throttle position sensor;

The main control chip records the minimum voltage value of the throttle position signal;

The main control chip judges whether the minimum voltage value is less than the no-load reference voltage value, if the minimum voltage value is greater than or equal to the no-load reference voltage value, the main control chip displays the high voltage value through the LCD display, and returns to the main control chip to record the step of the minimum voltage value of the throttle position signal;

If a high voltage value is displayed at no-load, it can be judged that the current throttle position sensor is faulty, and the next throttle position sensor can be replaced directly.

If the minimum voltage value is less than the no-load reference voltage value;

Then turn the throttle position sensor core clockwise;

The main control chip judges whether the voltage value of the throttle position signal has increased;

If the voltage value does not increase, return to continue to judge whether the voltage value of the throttle position signal increases;

The static detection process is mainly to detect whether the detection range of the throttle position sensor is qualified. First, check whether the minimum value of the range is less than 0.2V. The throttle position sensor generally has a voltage value of 0-0.1V after power-on, and the no-load reference voltage can be The value is set to 0.2V as the judgment basis. The allowable error range of the full load reference voltage can be set from 4.4V to 4.6V.

After turning the core of the throttle position sensor, the voltage value of the throttle position sensor changes from the minimum value to the maximum value. Judging whether the maximum value is between 4.4V and 4.6V is another standard for detecting whether the throttle position sensor is qualified.

However, when the throttle position sensor core is turned, jumping is easy to occur. In order to avoid the influence of interference signals, it is necessary to continuously judge the maximum value of the throttle position signal voltage for multiple times. If both n1 and n2 are set to 20, then It is necessary to carry out 20 uninterrupted judgments, and only after the 20 judgments are consistent can a reliable test result be obtained.

Therefore, it can also be said that the starting point of 20 judgments is set at the step of setting initialization parameters time=0, Err=0.

It is also possible to set the starting point of 20 judgments at the step where the main control chip judges whether the maximum value of the throttle position signal voltage output by the throttle position sensor is within the allowable error range of the full-load reference voltage.

Multiple judgments ensure the reliability and stability of the automatic detection function of the throttle position sensor detection device.

If the voltage value increases, set the initialization parameters time=0, Err=0;

The main control chip judges whether the maximum value of the throttle position signal voltage output by the throttle position sensor is within the allowable error range of the full-load reference voltage;

If it is not within the allowable error range, set Err=Err+1, and then judge whether Err is greater than n1 times, if Err is not greater than n1 times, return to continue to judge whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage Steps in; if Err is greater than n1 times, then by LCD display failure, and return to the step of the minimum voltage value of the main control chip record throttle position signal;

If it is within the allowable error range, then delay 1ms, set time=time+1;

Determine whether time is greater than n2 times, if time is not greater than n2 times, and return to the step of continuing to determine whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage;

If the time is greater than n2 times, the main control chip judges that the throttle position sensor is qualified, and the LCD display shows that the detection is completed;

Remove the throttle position sensor;

The main control chip judges whether the current voltage value is less than or equal to the minimum voltage value;

If the current voltage value is not less than the minimum voltage value, return and continue to judge whether the current voltage value is less than or equal to the minimum voltage value;

If the current voltage value is less than the minimum voltage value, then return to the step of the main control chip recording the minimum voltage value of the throttle position signal;

The dynamic detection process of the throttle position sensor is:

The throttle position sensor is installed on the throttle for loading monitoring;

After loading, the throttle position sensor core will rotate at a certain angle, but whether the angle of rotation is qualified or not needs to be tested.

Make sure that the angle of rotation is between the upper and lower limits of the set angle.

By identifying the current voltage value and adjusting the throttle position sensor core to ensure that the current voltage value is within the set voltage range, it can be determined that the installation is qualified.

The main control chip reads the throttle position signal of the throttle position sensor;

The main control chip displays the current voltage value of the throttle position sensor through the LCD display;

The main control chip judges whether the current voltage value is lower than the lower limit value AD1 of the set voltage interval;

If the current voltage value is less than the lower limit value AD1 of the set voltage interval;

The LCD display shows that the throttle position sensor core rotates counterclockwise

The current voltage value of the LCD display and the throttle rotation angle corresponding to the current voltage value:

(AD1-TPS)/0.05+1=throttle valve counterclockwise rotation angle;

Return to the step of the main control chip reading the throttle position signal of the throttle position sensor;

If the current voltage value is not less than the lower limit value AD1 of the set voltage range, the main control chip judges whether the current voltage value is greater than the upper limit value AD2 of the set voltage range;

The LCD display shows that the throttle position sensor core rotates clockwise

The current voltage value of the LCD display and the throttle rotation angle corresponding to the current voltage value:

(TPS-AD2)/0.05+1=throttle valve clockwise rotation angle;

Return to the step of the main control chip reading the throttle position signal of the throttle position sensor;

If the current voltage value is not greater than the upper limit value AD2 of the set voltage range, the LCD display shows that the loading is qualified.

The throttle position sensor detection device includes a main control chip, the main control chip is provided with an input terminal (ANO), the input terminal (ANO) is connected with a throttle position sensor socket, the main control chip is provided with a display terminal group, the The display end group is connected with an LCD display.

The main control chip is provided with a first display terminal, a second display terminal, a third display terminal and a fourth display terminal, and the first display terminal, the second display terminal, the third display terminal and the fourth display terminal are connected to the same LCD on the monitor.

The throttle position sensor socket is a three-pin socket, the first pin of the throttle position sensor socket is connected to the main control chip, the second pin is grounded, and the third pin is connected to the positive power supply Vcc.

The effect of the present invention is: an easy-to-operate throttle position sensor detection device and its detection method: the throttle signal is used as the judgment basis, and the throttle detection device with the judgment function can quickly realize the throttle position sensor entering the factory and entering the factory. Factory inspection, loading location inspection, and display of current opening and voltage value.

It can display the voltage signal of the throttle position, and the default rotation angle/voltage ratio of the model, display the rotation angle, and compare it with the default highest and lowest values. If there is any problem, it will alarm. When entering the factory for inspection, the operator only needs to connect the detector , Twist the axis of the sensor from the initial position to the end position, and the detector can automatically judge whether it is qualified or not.

The detection of the relative position of the throttle position sensor during loading is defined by detecting its voltage. The detector will prompt whether the current position is appropriate, and how much it should be rotated clockwise or counterclockwise.

Description of drawings

Fig. 1 is the circuit diagram of throttle position sensor detection device;

Fig. 2 is a flow chart of the static detection of the throttle position sensor;

Figure 3 is a flow chart of the dynamic detection of the throttle position sensor.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

As shown in Figure 1, a throttle position sensor detection device includes a main control chip U1, the main control chip U1 is provided with an input terminal ANO, the input terminal ANO is connected to a throttle position sensor socket J1, and the main control chip U1 A display terminal group is provided, and the display terminal group is connected with an LCD display.

The model of the main control chip U1 is P16F87.

The main control chip U1 is provided with a first display terminal LCD1, a second display terminal LCD2, a third display terminal LCD3, and a fourth display terminal LCD4. The first display terminal LCD1, the second display terminal LCD2, and the third display terminal LCD3 and the fourth display terminal LCD4 are connected to the same LCD display.

The sensor socket J1 is a three-pin socket, the first pin of the sensor socket J1 is connected to the main control chip U1, the first pin is grounded, and the first pin is connected to the positive power supply Vcc.

The detection method of the throttle position sensor detection device adopts the following steps:

It consists of the static detection process of the throttle position sensor and the dynamic detection process of the throttle position sensor.

As shown in Figure 2, the static detection process of the sensor adopts the following steps:

The quality inspection process of the sensor before loading,

Connect the no-load throttle position sensor detected by the factory with the first pin of the sensor socket J1;

The main control chip U1 reads the throttle position signal of the throttle position sensor;

The main control chip U1 records the lowest voltage value of the throttle position signal;

The main control chip U1 judges whether the lowest voltage value is less than the no-load reference voltage value, if the lowest voltage value is greater than or equal to the no-load reference voltage value, the main control chip U1 displays the high voltage value through the LCD display, and returns to the main control The step of chip U1 recording the lowest voltage value of the throttle position signal;

If a high voltage value is displayed at no-load, it can be judged that the current throttle position sensor is faulty, and the next throttle position sensor can be replaced directly.

If the minimum voltage value is less than the no-load reference voltage value;

The no-load reference voltage value can be 0.2V, 0.15V, 0.16V.

Then manually rotate the throttle position sensor core clockwise; the rotation of the throttle position sensor core will increase the voltage value of the throttle position signal.

The main control chip U1 judges whether the voltage value of the throttle position signal increases;

If the voltage value does not increase, it means that the throttle position sensor core has not started to rotate, and the main control chip U1 returns to continue to judge whether the voltage value of the throttle position signal has increased;

The static detection process is mainly to detect whether the detection range of the throttle position sensor is qualified. First, check whether the minimum value of the range is less than 0.2V. The throttle position sensor generally has a voltage value of 0-0.1V after power-on, and the no-load reference voltage can be The value is set to 0.2V as the judgment basis. The allowable error range of the full load reference voltage can be set from 4.4V to 4.6V.

If the model of the throttle position sensor varies, its output value is not 4.5V, if it is 5V, 6V, 3V, etc., the corresponding allowable error range is set to 4.9V to 5.1V, 5.9V to 6.1V, 2.9V to 3.1V, and so on.

After turning the core of the throttle position sensor, the voltage value of the throttle position sensor changes from the minimum value to the maximum value. Judging whether the maximum value is between 4.4V and 4.6V is another standard for detecting whether the throttle position sensor is qualified.

However, it is easy to turn the throttle position sensor core, and it is easy to jump. In order to avoid the influence of interference signals, it is necessary to continuously judge the maximum value of the throttle position signal voltage for multiple times. For example, if both n1 and n2 are set to 20, then It is necessary to carry out 20 uninterrupted judgments, and only after the 20 judgments are consistent can a reliable test result be obtained.

The times of n1 and n2 can be adjusted respectively according to needs, such as 10 times, 15 times, 30 times.

Therefore, it can also be said that the starting point of 20 judgments is set at the step of setting initialization parameters time=0, Err=0.

It is also possible to set the starting point of 20 judgments at the first step when the main control chip U1 judges whether the maximum value of the throttle position signal voltage output by the throttle position sensor is within the allowable error range of the full-load reference voltage.

Multiple judgments ensure the reliability and stability of the automatic detection function of the throttle position sensor detection device.

If the voltage value increases, set the initialization parameters time=0, Err=0;

The main control chip U1 determines whether the maximum value of the throttle position signal voltage output by the throttle position sensor is within the allowable error range of the full-load reference voltage;

If it is not within the allowable error range, set Err=Err+1, and then judge whether Err is greater than n1 times, if Err is not greater than n1 times, return to continue to judge whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage Steps within; if Err is greater than n1 times, the LCD display will display a failure, and return to the step of the main control chip U1 recording the lowest voltage value of the throttle position signal;

If it is within the allowable error range, then delay 1ms, set time=time+1;

Determine whether time is greater than n2 times, if time is not greater than n2 times, and return to the step of continuing to determine whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage;

If the time is greater than n2 times, the main control chip U1 judges that the throttle position sensor is qualified, and the LCD display shows that the detection is completed;

After the throttle position sensor is removed, the detection end of the throttle position sensor detection device is suspended in the air;

The main control chip U1 will judge whether the current voltage value is less than or equal to the minimum voltage value;

If the current voltage value is not less than the minimum voltage value, it indicates that the throttle position sensor is not completely disengaged from the throttle position sensor detection device.

The main control chip U1 will return to continue to judge whether the current voltage value is less than or equal to the minimum voltage value;

If the current voltage value is less than the minimum voltage value, return to the step of the main control chip U1 recording the minimum voltage value of the throttle position signal.

As shown in Figure 3, the dynamic detection process of the throttle position sensor is as follows:

The throttle position sensor is installed on the throttle for loading monitoring;

After loading, the throttle position sensor core will rotate at a certain angle, but whether the angle of rotation is qualified or not needs to be tested.

Make sure that the angle of rotation is between the upper and lower limits of the set angle.

By identifying the current voltage value and adjusting the throttle position sensor core to ensure that the current voltage value is within the set voltage range, it can be determined that the installation is qualified.

The main control chip U1 reads the throttle position signal of the throttle position sensor;

The main control chip U1 displays the current voltage value of the throttle position sensor through the LCD display;

The main control chip U1 judges whether the current voltage value is lower than the lower limit value AD1 of the set voltage range;

If the current voltage value is less than the lower limit value AD1 of the set voltage interval;

Manually turn the throttle position sensor core counterclockwise;

The LCD display shows that the throttle position sensor core rotates counterclockwise;

The current voltage value of the LCD display and the throttle rotation angle corresponding to the current voltage value:

(AD1-TPS)/0.05+1=throttle valve counterclockwise rotation angle;

According to actual needs, the lower limit AD1 may take other preset values such as 0.4, 0.5, or 0.55.

TPS is the detected current voltage value.

Return to the step of reading the throttle position signal of the throttle position sensor by the main control chip U1;

If the current voltage value is not less than the lower limit value AD1 of the set voltage range, the main control chip U1 judges whether the current voltage value is greater than the upper limit value AD2 of the set voltage range;

Manually turn the throttle position sensor core clockwise;

The LCD display shows that the throttle position sensor core rotates clockwise;

The current voltage value of the LCD display and the throttle rotation angle corresponding to the current voltage value:

(TPS-AD2)/0.05+1=throttle valve clockwise rotation angle;

According to actual needs, the upper limit AD2 may take other preset values such as 0.45, 0.5, 0.55, or 0.6.

Return to the step of reading the throttle position signal of the throttle position sensor by the main control chip U1;

If the current voltage value is not greater than the upper limit value AD2 of the set voltage range, the LCD display shows that the loading is qualified.

Claims (3)

1. a detection method of throttle position sensor detection device, is characterized in that, is made up of throttle position sensor static detection flow process and throttle position sensor dynamic detection flow process, The sensor static detection process adopts the following steps: Connect the no-load throttle position sensor detected at the factory with the first pin of the throttle position sensor socket (J1); The main control chip (U1) of the throttle position sensor detection device reads the throttle position signal of the throttle position sensor; The main control chip (U1) records the minimum voltage value of the throttle position signal; The main control chip (U1) judges whether the minimum voltage value is less than the no-load reference voltage value, if the minimum voltage value is greater than or equal to the no-load reference voltage value, the main control chip (U1) displays the high voltage value through the LCD display, and determines the section The valve position sensor is faulty, and returns to the step of recording the minimum voltage value of the throttle position signal by the main control chip (U1); If the lowest voltage value is less than the no-load reference voltage value, turn the throttle position sensor core clockwise; The main control chip (U1) judges whether the voltage value of the throttle position signal has increased; If the voltage value does not increase, return to continue to judge whether the voltage value of the throttle position signal increases; If the voltage value increases, set the initialization parameters time=0, Err=0; The main control chip (U1) determines whether the maximum value of the throttle position signal voltage output by the throttle position sensor is within the allowable error range of the full-load reference voltage; If it is not within the allowable error range, set Err=Err+1, and then judge whether Err is greater than n1 times, if Err is not greater than n1 times, return to continue to judge whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage Steps in; if Err is greater than n1 times, then by LCD display fault, and return to the step of the minimum voltage value of described main control chip (U1) record throttle position signal; If it is within the allowable error range, then delay 1ms, set time=time+1; Determine whether time is greater than n2 times, if time is not greater than n2 times, and return to the step of continuing to determine whether the maximum value of the throttle position signal voltage is within the allowable error range of the full-load reference voltage; If the time is greater than n2 times, the main control chip (U1) judges that the throttle position sensor is qualified, and the LCD display shows that the detection is completed; Remove the throttle position sensor; The main control chip (U1) judges whether the current voltage value is less than or equal to the minimum voltage value; If the current voltage value is not less than the minimum voltage value, return and continue to judge whether the current voltage value is less than or equal to the minimum voltage value; If the current voltage value is less than the minimum voltage value, then return to the step of the main control chip (U1) recording the minimum voltage value of the throttle position signal; The dynamic detection process of the throttle position sensor is: The throttle position sensor is installed on the throttle for loading monitoring; The main control chip (U1) reads the throttle position signal of the throttle position sensor; The main control chip (U1) displays the current voltage value of the throttle position sensor through the LCD display; The main control chip (U1) judges whether the current voltage value is less than the lower limit value AD1 of the set voltage range; If the current voltage value is less than the lower limit value AD1 of the set voltage range; Manually turn the throttle position sensor core counterclockwise; The LCD display shows that the core of the throttle position sensor rotates counterclockwise; The LCD display shows the current voltage value and the throttle rotation angle corresponding to the current voltage value: (0.55-TPS)/0.05+1=throttle valve counterclockwise rotation angle, where TPS represents the current voltage value; Return to the step of the main control chip (U1) reading the throttle position signal of the throttle position sensor; If the current voltage value is not less than the lower limit value of the set voltage range, the main control chip (U1) judges whether the current voltage value is greater than the upper limit value AD2 of the set voltage range; Manually turn the throttle position sensor core clockwise; The LCD display shows that the throttle position sensor core rotates clockwise; The LCD display shows the current voltage value and the throttle rotation angle corresponding to the current voltage value: (TPS-0.65)/0.05+1=throttle valve clockwise rotation angle, where TPS represents the current voltage value; Return to the step of the main control chip (U1) reading the throttle position signal of the throttle position sensor; If the current voltage value is not greater than the upper limit value of the set voltage range, the LCD display shows that the loading is qualified. 2. The detection method of the throttle position sensor detection device according to claim 1: the throttle position sensor detection device comprises a main control chip (U1), and the main control chip (U1) is provided with an input terminal (ANO), the The input terminal (ANO) is connected with a throttle position sensor socket (J1), and the main control chip (U1) is provided with a display terminal group, and the display terminal group is connected with an LCD display. 3. The detection method of the throttle position sensor detection device according to claim 1: the throttle position sensor socket (J1) is a three-pin socket, and the first pin of the throttle position sensor socket (J1) is connected to the main pin. The control chip (U1), the second pin is grounded, and the third pin is connected to the positive power supply Vcc.

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