CN114001951B - Synchronizer detection system and method for transmission - Google Patents
Synchronizer detection system and method for transmission Download PDFInfo
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- CN114001951B CN114001951B CN202111265163.9A CN202111265163A CN114001951B CN 114001951 B CN114001951 B CN 114001951B CN 202111265163 A CN202111265163 A CN 202111265163A CN 114001951 B CN114001951 B CN 114001951B
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Abstract
The invention discloses a synchronizer detection system and method of a transmission. The system comprises: the transmission comprises a transmission body, an audio sensor and a control module; the speed changer body is in communication connection with the control module; the control module is used for driving the rotation speed of the input shaft of the speed changer body to be a first preset rotation speed and the rotation speed of the output shaft of the speed changer body to be a second preset rotation speed; the transmission body comprises a shifting fork position sensor; the shifting fork position sensor is used for detecting a synchronous position signal of the synchronizer when the rotating speed of the input shaft is a first preset rotating speed and the rotating speed of the output shaft is a second preset rotating speed; the audio sensor is arranged on one side of the speed changer body and is used for collecting audio signals of the speed changer body and surrounding environment thereof; the control module is also used for acquiring an audio signal when the shifting fork position sensor detects the synchronous position of the synchronizer and within a preset time after the synchronous position of the synchronizer is detected, and judging whether the synchronizer is abnormal or not according to the audio signal. The scheme improves the accuracy of the abnormality detection of the synchronizer.
Description
Technical Field
The embodiment of the invention relates to a transmission detection technology, in particular to a synchronizer detection system and method of a transmission.
Background
Currently, manual transmissions and dual clutch automatic transmissions are multi-speed transmissions, such as popular 5-speed manual transmissions, motor-driven 6-speed manual transmissions, one-gas autonomous wet dual clutch 7-speed automatic transmissions, and other numerous dual clutch automatic transmissions 7-speed, 8-speed, 9-speed, commercial vehicle manual and AMT automatic transmissions also have multi-speed synchronizer-equipped transmissions, 9,10, 12-speed, and so on. Each gear of the stepped multi-gear transmission is provided with a synchronizer, so that smooth gear engagement in the vehicle gear engagement process is ensured, and gear engagement noise is eliminated. The gear shifting synchronization function is ensured by the mechanical property of the synchronizer and the quality of the products of parts. The mechanical device has the advantages of ensuring smooth synchronization in the gear engaging process, locking during non-synchronization, and being capable of shifting after synchronization and being incapable of shifting after non-synchronization.
In the actual production process of the product, the manufacturing quality problem of parts can occur, so that after the whole box is assembled into the whole vehicle, the gear of the transmission is unsmooth, the gear engaging noise occurs, and the production quality and the beat are affected. If the abnormal gear shifting and tooth beating sounds cannot be found in time after the produced transmission is assembled to the whole vehicle, secondary damage of mechanical hardware such as transmission combination teeth is caused, and the whole vehicle cannot be used. The production at the present stage adopts a 'hundred-detection' mode for a plurality of sizes of parts, only controls the quality of the transmission before assembly, and the detection process consumes a great deal of manpower and material resources. Even if the 'hundred-detection' of parts is qualified, the 'neglected loading' and the 'wrong loading' phenomenon still occur when the whole gearbox is assembled, if the phenomenon is not detected, the produced gearbox can generate abnormal gear shifting and tooth beating sounds after being assembled to the whole gearbox, so that the secondary damage of mechanical hardware such as a gearbox combined tooth and the like is caused, and the whole gearbox cannot be used.
In the prior art, a mode of detecting the gear engaging force and the gear engaging time is adopted for detection. In the mode, the gear shifting time is relatively short and is only 0.15 to 0.3 seconds, so that the self gear shifting force of the automatic transmission can not be increased, the sensor can not measure, the sampling precision and the resolution of the position sensor can not be increased, and the like, and the false judgment and the missed judgment are easy to occur.
Disclosure of Invention
The invention provides a synchronizer detection system and method of a transmission, which are used for analyzing and judging whether a synchronizer is abnormal or not by utilizing signals acquired by an audio sensor, so that the accuracy of synchronizer abnormality detection is improved.
In a first aspect, an embodiment of the present invention provides a synchronizer detection system of a transmission, including: the transmission comprises a transmission body, an audio sensor and a control module;
The speed changer body is in communication connection with the control module; the control module is used for driving the rotation speed of the input shaft of the transmission body to be a first preset rotation speed; the rotation speed of the output shaft for driving the speed changer body is a second preset rotation speed; the transmission body comprises a shifting fork position sensor; the shifting fork position sensor is used for detecting a synchronous position signal of the synchronizer when the rotating speed of the input shaft of the transmission body is a first preset rotating speed and the rotating speed of the output shaft of the transmission body is a second preset rotating speed;
the audio sensor is arranged on one side of the speed change body and is used for collecting audio signals of the speed change body and the surrounding environment of the speed change body;
The control module is respectively in communication connection with the shifting fork position sensor and the audio sensor, and is further used for acquiring the audio signal when the shifting fork position sensor detects the synchronous position of the synchronizer and a preset time after the synchronous position of the synchronizer is detected, and judging whether the synchronizer is abnormal or not according to the audio signal.
Optionally, the audio sensor includes a first audio sensor and a second audio sensor;
The first audio sensor is disposed within a first circumferential range from the transmission body; the second audio sensor is arranged outside a second circumferential range from the transmission body;
The control module is respectively in communication connection with the shifting fork position sensor, the first audio sensor and the audio sensor, and is specifically used for acquiring a first audio signal acquired by the first audio sensor and a third audio signal acquired by the second audio sensor when the shifting fork position sensor detects the synchronous position of the synchronizer;
the preset time is reserved after the shifting fork position sensor detects the synchronous position of the synchronizer, and a second audio signal acquired by the first audio sensor and a fourth audio signal acquired by the second audio sensor are acquired;
and judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
Optionally, an audio isolator is also included;
The audio isolator is arranged between the first audio sensor and the second audio sensor; the audio isolator is used for blocking the second audio sensor from collecting the first audio signal or the third audio signal; and the first audio sensor is also used for blocking the first audio sensor from collecting the third audio signal or the fourth audio signal.
Optionally, the audio sensor further comprises a third audio sensor;
The third audio sensor is arranged on one side of a vertical center line between the first audio sensor and the second audio sensor;
The control module is also in communication connection with the third audio sensor and is particularly used for acquiring a fifth audio signal acquired by the third audio sensor when the shifting fork position sensor detects the synchronous position of the synchronizer; the preset time is after the shifting fork position sensor detects the synchronous position of the synchronizer, and a sixth audio signal acquired by the third audio sensor is acquired;
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
Optionally, the audio sensor further comprises a fourth audio sensor, a fifth audio sensor, a … (N-1) th audio sensor and an nth audio sensor;
The fourth audio sensor is arranged on one side of the same distance position as the first audio sensor, the second audio sensor and the third audio sensor;
…；
The nth audio sensor is arranged at one side of the same distance position from the first audio sensor, the second audio sensor, the third audio sensor, the fourth audio sensor, the fifth audio sensor … and the nth-1 audio sensor;
The control module is also in communication connection with the nth audio sensor of the fourth audio sensor …, and is specifically configured to obtain a 2N-1 th audio signal collected by the nth audio sensor when the shift fork position sensor detects the synchronization position of the synchronizer; presetting time after the shifting fork position sensor detects the synchronous position of the synchronizer, and acquiring a 2N audio signal acquired by the N audio sensor;
Judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
In a second aspect, an embodiment of the present invention further provides a method for detecting a synchronizer of a transmission, where the method is applied to the system for detecting a synchronizer of a transmission described in the first aspect, and the method for detecting a synchronizer of a transmission includes:
The rotation speed of an input shaft of the transmission body is driven to be a first preset rotation speed; the rotation speed of an output shaft of the transmission body is driven to be a second preset rotation speed;
receiving a synchronization position signal of the synchronizer;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time;
Judging whether the synchronizer is abnormal according to the audio signal.
Optionally, the audio sensor includes a first audio sensor and a second audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
Receiving a first audio signal acquired by the first audio sensor and a third audio signal acquired by the second audio sensor when receiving a synchronous position signal of the synchronizer;
Receiving a second audio signal acquired by the first audio sensor and a fourth audio signal acquired by the second audio sensor when receiving a synchronization position signal preset time of the synchronizer;
judging whether the synchronizer is abnormal according to the audio signal, including:
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
Optionally, the audio sensor further comprises a third audio sensor; the third audio sensor is arranged on one side of a vertical center line between the first audio sensor and the second audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
when the synchronous position signal of the synchronizer is received, a first audio signal acquired by the first audio sensor, a third audio signal acquired by the second audio sensor and a fifth audio signal acquired by the third audio sensor are received;
receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor and a sixth audio signal acquired by the third audio sensor when a synchronization position signal of the synchronizer is received for a preset time;
judging whether the synchronizer is abnormal according to the audio signal, including:
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
Optionally, the audio sensor further comprises a fourth audio sensor, a fifth audio sensor, a … (N-1) th audio sensor and an nth audio sensor;
The fourth audio sensor is arranged on one side of the same distance position as the first audio sensor, the second audio sensor and the third audio sensor;
…；
The nth audio sensor is arranged at one side of the same distance position from the first audio sensor, the second audio sensor, the third audio sensor, the fourth audio sensor, the fifth audio sensor … and the nth-1 audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
When the synchronous position signal of the synchronizer is received, a first audio signal collected by the first audio sensor, a third audio signal collected by the second audio sensor, a fifth audio signal collected by the third audio sensor, a seventh audio signal collected by the fourth audio sensor and a 2N-1 audio signal collected by the N audio sensor are received;
Receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor, a sixth audio signal acquired by the third audio sensor, an eighth audio signal acquired by the fourth audio sensor and a 2N audio signal acquired by the N audio sensor when receiving a synchronization position signal preset time of the synchronizer;
judging whether the synchronizer is abnormal according to the audio signal, including:
Judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the 2N audio signal and the 2N-1 audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
Optionally, the method further comprises:
and obtaining the gear speed ratio corresponding to the synchronizer to be tested.
According to the embodiment of the invention, the control module drives the rotation speed of the input shaft of the speed changer body to be a first preset rotation speed and the rotation speed of the output shaft of the speed changer body to be a second preset rotation speed; when the rotation speed of the input shaft of the speed changer body is a first preset rotation speed and the rotation speed of the output shaft of the speed changer body is a second preset rotation speed, detecting a synchronous position signal of the synchronizer through a shifting fork position sensor; the audio sensor is used for collecting audio signals of the transmission body and the surrounding environment of the transmission body; and then the control module acquires the audio signal when the shifting fork position sensor detects the synchronous position of the synchronizer and the preset time is spent after the synchronous position of the synchronizer is detected, and judges whether the synchronizer is abnormal or not according to the audio signal. The technical scheme realizes that whether the synchronizer is abnormal or not by utilizing the audio sensor, and improves the accuracy of detecting the abnormality of the synchronizer.
Drawings
FIG. 1 is a schematic diagram of a synchronizer detection system of a transmission according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another transmission synchronizer detection system according to an embodiment of the present invention;
FIG. 3 is a graph of the frequency spectrum of sound values at different frequencies at time a according to an embodiment of the present invention;
FIG. 4 is a graph of the frequency spectrum of the acoustic values at different frequencies at time b according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another transmission synchronizer detection system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another synchronizer detection system for a transmission according to an embodiment of the present invention;
FIG. 7 is a flowchart of a method for synchronizer detection of a transmission according to an embodiment of the present invention;
FIG. 8 is a flow chart of a synchronizer detection method for a transmission according to an embodiment of the present invention;
Fig. 9 is a flowchart of a method for detecting a synchronizer of a transmission according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a synchronizer detection system of a transmission according to an embodiment of the present invention, and as shown in fig. 1, the synchronizer detection system includes a transmission body 10, an audio sensor 20, and a control module 30; the transmission body 10 is in communication connection with the control module 30; a control module 30 for driving the input shaft rotation speed of the transmission body 10 to a first preset rotation speed; the rotation speed of the output shaft for driving the transmission body 10 is a second preset rotation speed; the transmission body 10 includes a fork position sensor 11; a shift fork position sensor 11 for detecting a synchronization position signal of the synchronizer when the input shaft rotation speed of the transmission body 10 is a first preset rotation speed and the output shaft rotation speed of the transmission body 10 is a second preset rotation speed; the audio sensor 20 is disposed at one side of the transmission body 10, and is used for collecting audio signals of the transmission body 10 and surrounding environment of the transmission body 10; the control module 30 is respectively connected with the shift fork position sensor 11 and the audio sensor 20 in a communication manner, and is further configured to obtain an audio signal when the shift fork position sensor 11 detects a synchronization position signal of the synchronizer and a preset time after the synchronization position signal of the synchronizer is detected, and determine whether the synchronizer is abnormal according to the audio signal.
Wherein the transmission body 10 includes an input shaft, an intermediate shaft, and an output shaft; the transmission body 10 is connected with a driving system through an input shaft thereof, the transmission body 10 is connected with a load system through an output shaft thereof, and the load system is generally a dynamometer or a load motor and is provided with a braking device; the input shaft rotation speed is the rotation speed of a driving motor in a driving system, the output shaft is the rotation speed generated by different gear meshing between the intermediate shaft and the output shaft, and different gear meshing has different gear speed ratios, so that the input shaft rotation speed of the transmission body 10 and the output shaft rotation speed of the transmission body 10 need to meet the gear speed ratios. The synchronizer detection system of the transmission detects the synchronizer in the following steps: the control module 30 drives the input shaft of the transmission body 10 to rotate at a first preset speed, that is, drives the driving motor to rotate at the first preset speed, and drives the output shaft of the transmission body 10 to rotate at a second preset speed, when the first preset speed and the second preset speed do not meet the gear speed ratio, the synchronizer starts to play a role of synchronization, under the detection working condition, the shifting fork position sensor 11 detects the synchronous position signal of the synchronizer, the control module 30 respectively acquires the audio signals acquired by the audio sensor 20 when the shifting fork position sensor 11 detects the synchronous position signal of the synchronizer and the preset time after detecting the synchronous position signal of the synchronizer, and then judges whether the synchronizer is abnormal according to the audio signals acquired at different moments, so that judgment of whether the synchronizer is abnormal or not through the audio sensor is realized, the accuracy of abnormality detection of the synchronizer is improved, and the production quality of the transmission body assembly is ensured.
Optionally, fig. 2 is a schematic structural diagram of a synchronizer detection system of another transmission according to an embodiment of the present invention, and as shown in fig. 2, an audio sensor 20 includes a first audio sensor 21 and a second audio sensor 22; the first audio sensor 21 is disposed within a first range d1 from the transmission body 10; the second audio sensor 22 is disposed outside the range of the second circumference d2 from the transmission body 10; the control module 30 is respectively in communication connection with the shift fork position sensor 11, the first audio sensor 21 and the audio sensor 22, and is specifically configured to obtain a first audio signal collected by the first audio sensor 21 and a third audio signal collected by the second audio sensor 22 when the shift fork position sensor 11 detects a synchronous position signal of the synchronizer; a preset time is reserved after the shifting fork position sensor 11 detects a synchronous position signal of the synchronizer, and a second audio signal acquired by the first audio sensor 21 and a fourth audio signal acquired by the second audio sensor 22 are acquired; and judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
Wherein, the first audio sensor 21 is disposed within a first circumference d1 of the transmission body 10, d1 satisfies: d1 is more than or equal to 0.05m and less than or equal to 0.5m; the first audio sensor 21 respectively collects a first audio signal and a third audio signal at different moments, and audio components in the first audio signal and the third audio signal are mainly audio signals near the transmission body 11; the second audio sensor 22 is disposed within a second circumference d2 of the transmission body 10, d2 satisfying: d2 is more than or equal to 2.0m and less than or equal to 5.0m; the second audio sensor 22 collects a second audio signal and a fourth audio signal at different moments, and audio components in the second audio signal and the fourth audio signal are mainly audio signals of the peripheral environment of the transmission body, and the second audio sensor 22 is mainly used for measuring audio signals near a test bench formed by a driving system, the transmission body and the system. The specific processing procedure of the control module 30 for judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal acquired at different moments is as follows:
Firstly, when the shifting fork position sensor 11 detects a synchronous position signal of a synchronizer, namely, at the time a, a first audio signal acquired by the first audio sensor 21 and a second audio signal acquired by the second audio sensor 22 are acquired; the first audio signal and the second audio signal are respectively subjected to frequency domain processing to obtain sound volume values under different frequencies; FIG. 3 is a graph of the frequency spectrum of sound values at different frequencies at time a according to an embodiment of the present invention; as shown in fig. 3, SA is a processing result of the first audio signal; SB is the processing result of the second audio signal; at the moment, SA is selected to be larger than SB, signal amplitude SA and SB are correspondingly recorded, and a corresponding frequency value P is recorded at the same time;
A preset time is reserved after the shifting fork position sensor 11 detects the synchronous position signal of the synchronizer, namely, at the time b, a third audio signal acquired by the first audio sensor 21 and a fourth audio signal acquired by the second audio sensor 22 are acquired; the third audio signal and the fourth audio signal are respectively subjected to frequency domain processing to obtain sound volume values under different frequencies; FIG. 4 is a graph of the frequency spectrum of the acoustic values at different frequencies at time b according to an embodiment of the present invention; as shown in fig. 4, SA' is a processing result of the third audio signal; SB' is the processing result of the fourth audio signal; at time b, recording the third audio signal amplitude SA 'and the fourth audio signal amplitude SB' at the corresponding frequency value P selected at time a; then determining that the synchronizer is abnormal according to SA, SB, SA ', SB' recorded at two different moments when SA '-SA > k (SB' -SB); where k is a calibration factor, typically 1.5-3.5, depending on the spacing of the two audio sensors. It will be appreciated that when SA '-SA > k (SB' -SB) indicates a larger change in the amplitude of the audio signal around the transmission body 11, it can be determined that the synchronizer within the transmission body 11 is abnormal, and when SA '-SA < k (SB' -SB) indicates a smaller change in the amplitude of the audio signal around the transmission body 11, the synchronizer within the transmission body 11 is less likely to be abnormal. In the actual process of judging the abnormality of the synchronizer, SA > SB can be selected at the time a, and a plurality of signal amplitudes SA＝[S10、S11、S12、S13、S14],SB＝[S20、S21、S22、S23、S24], are recorded, and corresponding frequency values [ P 0、P1、P2、P3、P4 ] are recorded at the same time; at time b, recording a third audio signal amplitude SA '= [ S 10'、S11'、S12'、S13'、S14' ] and a fourth audio signal amplitude SB '= [ S 20'、S21'、S22'、S23'、S24' ] at the corresponding frequency value p= [ P 0、P1、P2、P3、P4 ] selected at time a; thus, SA '-SA > k (SB' -SB) can be judged for multiple times, and the reliability of judging the abnormality of the synchronizer is improved.
Optionally, fig. 5 is a schematic structural diagram of a synchronizer detection system of another transmission according to an embodiment of the present invention, as shown in fig. 5, where the synchronizer detection system further includes an audio isolator 40; the audio isolator 40 is disposed between the first audio sensor 21 and the second audio sensor 22; an audio isolator 40 for blocking the second audio sensor 22 from collecting the first audio signal or the second audio signal; but also to block the first audio sensor 21 from collecting the third audio signal or the fourth audio signal.
The audio isolator 40 may be an audio partition, such as sound absorbing cotton, or a solid object with a certain thickness; the first audio sensor 21 can be blocked from collecting the third audio signal or the fourth audio signal, the second audio sensor 22 is blocked from collecting the first audio signal or the second audio signal, the sound levels of the first audio signal and the second audio signal collected by the first audio sensor 21 are guaranteed, larger interference of the third audio signal and the fourth audio signal collected by the second audio sensor is avoided, the signal reliability of the first audio signal and the second audio signal collected by the first audio sensor 21 is high, and the signal reliability of the third audio signal and the fourth audio signal collected by the second audio sensor 22 is high.
Optionally, fig. 6 is a schematic structural diagram of a synchronizer detection system of another transmission according to an embodiment of the present invention, and as shown in fig. 6, the audio sensor 20 further includes a third audio sensor 23; the third audio sensor 23 is disposed on the side of the vertical center line between the first audio sensor 21 and the second audio sensor 22; the control module 30 is further in communication connection with the third audio sensor 23, and is specifically configured to obtain a fifth audio signal collected by the third audio sensor 13 when the shift fork position sensor 11 detects a synchronization position signal of the synchronizer; after the shifting fork position sensor 11 detects the synchronous position signal of the synchronizer, presetting time, and acquiring a sixth audio signal acquired by the third audio sensor 13; judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
If there is a sound source on the vertical center line between the first audio sensor 21 and the second audio sensor 22, the sound source may be, for example, a fan sound in the test bed; the amplitudes of the audio signals of the sound sources collected by the first audio sensor 21 and the second audio sensor 22 are the same, the audio signals of the transmission body 11 and the surrounding environment thereof collected by the first audio sensor 21 and the second audio sensor 22 are also approximately the same, and the audio isolator is not arranged in the detection system to isolate the sound of the first audio sensor and the second audio sensor, so that a third audio sensor 23 is required to be arranged on one side of the vertical center line between the first audio sensor 21 and the second audio sensor 22, and whether the synchronizer is abnormal is judged according to the fifth audio signal and the sixth audio signal obtained by the third audio sensor 23 and the first audio signal and the second audio signal obtained by the first audio sensor 21; illustratively, SC is the result of the fifth audio signal processing, SC' is the result of the sixth audio signal processing; when SA '-SA > k (SC' -SC), determining abnormal synchronizer; or when SB '-SB > k (SC' -SC), synchronizer abnormality can be determined.
Optionally, and by analogy, the audio sensor 20 further comprises a fourth audio sensor, a fifth audio sensor, a … th N-1 th audio sensor, and an Nth audio sensor; the fourth audio sensor is arranged at one side at the same distance from the first audio sensor 21, the second audio sensor 22 and the third audio sensor 23; …; the Nth audio sensor is arranged at one side at the same distance from the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 th audio sensor; the control module 30 is further in communication connection with an nth audio sensor of the fourth audio sensor …, and is specifically configured to obtain a 2N-1 audio signal collected by the nth audio sensor when the shift fork position sensor detects the synchronization position of the synchronizer; acquiring a 2N audio signal acquired by an N audio sensor within a preset time after the shifting fork position sensor detects the synchronous position of the synchronizer;
Judging whether the synchronizer is abnormal or not according to the first audio signal, the second audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
If a sound source exists at the same distance from the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 audio sensor, the signal amplitudes of the sound sources collected by the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 audio sensor are the same; the audio signals of the transmission body 11 and the surrounding environment thereof collected by the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 th audio sensor are approximately the same, and the audio isolator in the detection system is used for carrying out sound isolation on the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 th audio sensor, so that the N-th audio sensor is required to be arranged on one side of the same distance position from the first audio sensor 21, the second audio sensor 22, the third audio sensor 23, the fourth audio sensor, the fifth audio sensor … and the N-1 th audio sensor, and judging whether the synchronizer is abnormal or not according to the 2N-1 th audio signal and the 2N audio signal obtained by the N-th audio sensor and the first audio signal and the second audio signal obtained by the first audio sensor 21; illustratively, SN is the result of the 2N-1 audio signal processing, and SN' is the result of the 2N audio signal processing; when SA '-SA > k (SN' -SN), determining the abnormality of the synchronizer; or when SB '-SB > k (SN' -SN), the synchronizer abnormality can be determined.
The embodiment of the invention also provides a synchronizer detection method of the transmission, and fig. 7 is a flowchart of the synchronizer detection method of the transmission, as shown in fig. 7, and the synchronizer detection method comprises the following steps:
S110, driving the input shaft rotating speed of the transmission body to be a first preset rotating speed; the rotation speed of the output shaft of the driving speed changer body is a second preset rotation speed.
When the rotation speed of the input shaft driving the speed change body is a first preset rotation speed; when the rotation speed of the output shaft of the driving transmission body is a second preset rotation speed and the first preset rotation speed and the second preset rotation speed do not meet the gear speed ratio, preferably, the first preset rotation speed can be set to be non-zero, and the second preset rotation speed can be set to be zero; preferably, the first preset rotational speed and the second preset rotational speed may also satisfy: the first preset rotating speed/current test gear speed ratio-the second preset rotating speed is more than 150, so that the synchronizer is guaranteed to play a role of 'synchronization', and the effectiveness of the testing working condition of the synchronizer is guaranteed.
S120, receiving a synchronous position signal of the synchronizer.
When the rotation speed of the input shaft of the driving transmission body is a first preset rotation speed; under the specific working condition that the rotation speed of an output shaft of the transmission body is the second preset rotation speed, when a shifting fork position sensor in the transmission body detects that the shifting fork moving speed is zero and the shifting fork moving distance is smaller than the whole shifting stroke, the shifting fork position sensor detects that the synchronizer enters the synchronous position, a lock ring in the synchronizer is just contacted with a gear ring to be combined, if the synchronizer is abnormal, tooth striking sounds of collision of the lock ring and the gear ring to be combined are very easy to occur in the synchronizer, and therefore, under the specific working condition, synchronous position signals of the synchronizer detected by the shifting fork position sensor are required to be received.
S130, receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time.
S140, judging whether the synchronizer is abnormal according to the audio signal.
The synchronizer detection method is applied to the synchronizer detection system of the transmission, which is described in the embodiment, and comprises a transmission body, an audio sensor and a control module; the control module drives the input shaft rotating speed of the transmission body to be a first preset rotating speed, and drives the output shaft rotating speed of the transmission body to be a second preset rotating speed, when the first preset rotating speed and the second preset rotating speed do not meet the transmission ratio, the synchronizer starts to play a role of synchronization, under the detection working condition, the shifting fork position sensor detects the synchronous position signal of the synchronizer, the control module respectively acquires the audio signals acquired by the audio sensor when the shifting fork position sensor detects the synchronous position signal of the synchronizer and the preset time after the synchronous position of the synchronizer is detected, and then judges whether the synchronizer is abnormal according to the audio signals acquired at different moments, so that the judgment of whether the synchronizer is abnormal or not through the audio sensor is realized, the accuracy of the abnormality detection of the synchronizer is improved, and the production quality of the transmission body assembly is ensured.
Optionally, on the basis of the foregoing embodiment, further refinement is performed on determining whether the synchronizer is abnormal according to the audio signal, and fig. 8 is a flowchart of a method for detecting a synchronizer of a transmission according to an embodiment of the present invention, as shown in fig. 8, where the method for detecting a synchronizer specifically includes the following steps:
s210, driving the input shaft rotating speed of the transmission body to be a first preset rotating speed; the rotation speed of the output shaft of the driving speed changer body is a second preset rotation speed.
S220, receiving a synchronous position signal of the synchronizer.
And S230, receiving a first audio signal acquired by the first audio sensor and a third audio signal acquired by the second audio sensor when receiving the synchronous position signal of the synchronizer.
S240, after receiving the synchronization position signal of the synchronizer for a preset time, receiving the second audio signal collected by the first audio sensor and the fourth audio signal collected by the second audio sensor.
S250, judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
Wherein the audio sensor comprises a first audio sensor and a second audio sensor; recording a first audio signal processing result SA of the first audio sensor and a third audio signal processing result SA' of the second audio sensor when the synchronous position signal of the synchronizer is received; after receiving a synchronization position signal of the synchronizer for a preset time, recording a second audio signal processing result SB 'from the first audio sensor and a fourth audio signal processing result SB' from the second audio sensor, and recording SA, SB, SA ', SB' according to two different moments; when SA '-SA > k (SB' -SB), determining that the synchronizer is abnormal; where k is a calibration factor, typically 1.5-3.5, depending on the spacing of the two audio sensors.
Optionally, on the basis of the foregoing embodiment, fig. 9 is a flowchart of a method for detecting a synchronizer of a transmission according to an embodiment of the present invention, as shown in fig. 9, where the method for detecting a synchronizer includes:
S310, obtaining a gear speed ratio corresponding to the synchronizer to be tested.
When a synchronizer detection request is received, corresponding gear speed ratios of the synchronizer to be detected are obtained, wherein each gear speed ratio can be i= [17.5 12.7 9.2 7.2 5.4 3.9 15.8], and the rotation speeds of an input shaft and an output shaft of the transmission body under the synchronizer detection working condition are set subsequently.
S320, driving the input shaft rotation speed of the transmission body to be a first preset rotation speed; the rotation speed of the output shaft of the driving speed changer body is a second preset rotation speed.
S330, receiving a synchronous position signal of the synchronizer.
And S340, when the synchronous position signal of the synchronizer is received, the first audio signal collected by the first audio sensor, the third audio signal collected by the second audio sensor and the fifth audio signal collected by the third audio sensor are received.
S350, after receiving the synchronization position signal of the synchronizer for a preset time, receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor and a sixth audio signal acquired by the third audio sensor.
S360, judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
Wherein the audio sensor further comprises a third audio sensor; the third audio sensor is arranged on one side of a vertical center line between the first audio sensor and the second audio sensor; judging whether the synchronizer is abnormal or not according to the fifth audio signal and the sixth audio signal acquired by the third audio sensor 13 and the first audio signal and the second audio signal acquired by the first audio sensor; illustratively, SC is the result of the fifth audio signal processing, SC' is the result of the sixth audio signal processing; when SA '-SA > k (SC' -SC), determining abnormal synchronizer; or when SB '-SB > k (SC' -SC), synchronizer abnormality can be determined.
Optionally, the audio sensor further comprises a fourth audio sensor, a fifth audio sensor, a … (N-1) th audio sensor and an nth audio sensor; the fourth audio sensor is arranged on one side of the same distance position as the first audio sensor, the second audio sensor and the third audio sensor; …; the Nth audio sensor is arranged on one side of the same distance position from the first audio sensor, the second audio sensor, the third audio sensor, the fourth audio sensor, the fifth audio sensor … and the N-1 th audio sensor;
Receiving an audio signal collected by an audio sensor when receiving a synchronous position signal of a synchronizer and after receiving the synchronous position signal of the synchronizer for a preset time, comprising:
When a synchronous position signal of a synchronizer is received, a first audio signal collected by a first audio sensor, a third audio signal collected by a second audio sensor, a fifth audio signal collected by the third audio sensor, a seventh audio signal collected by a fourth audio sensor and a 2N-1 audio signal collected by an N audio sensor are received;
after receiving a synchronization position signal of the synchronizer for a preset time, receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor, a sixth audio signal acquired by the third audio sensor, an eighth audio signal acquired by the fourth audio sensor and a 2N audio signal acquired by the N audio sensor;
Judging whether the synchronizer is abnormal according to the audio signal, comprising:
Judging whether the synchronizer is abnormal or not according to the first audio signal, the second audio signal, the 2N audio signal and the 2N-1 audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
The method comprises the steps that by analogy, an N-th audio sensor is arranged on one side of the same distance position from a first audio sensor, a second audio sensor, a third audio sensor, a fourth audio sensor, a fifth audio sensor … and an N-1-th audio sensor, and whether a synchronizer is abnormal or not is judged according to a 2N-1-th audio signal and a 2N audio signal acquired by the N-th audio sensor and a first audio signal and a second audio signal acquired by the first audio sensor; illustratively, SN is the result of the 2N-1 audio signal processing, and SN' is the result of the 2N audio signal processing; when SA '-SA > k (SN' -SN), determining the abnormality of the synchronizer; or when SB '-SB > k (SN' -SN), the synchronizer abnormality can be determined. It will be appreciated that the specific number of audio sensors is not limited herein, and that the number of audio sensors is specifically determined by the number of sound sources and the distance of the sound sources from each audio sensor.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A synchronizer detection system of a transmission, comprising: the transmission comprises a transmission body, an audio sensor and a control module;
The speed changer body is in communication connection with the control module; the control module is used for driving the rotation speed of the input shaft of the transmission body to be a first preset rotation speed; the rotation speed of the output shaft for driving the speed changer body is a second preset rotation speed; the transmission body comprises a shifting fork position sensor; the shifting fork position sensor is used for detecting a synchronous position signal of the synchronizer when the rotating speed of the input shaft of the transmission body is a first preset rotating speed and the rotating speed of the output shaft of the transmission body is a second preset rotating speed; wherein the first preset rotational speed and the second preset rotational speed do not satisfy the gear speed ratio of the transmission body;
the audio sensor is arranged on one side of the speed changer body and used for respectively collecting audio signals of the speed changer body and the surrounding environment of the speed changer body;
The control module is respectively in communication connection with the shifting fork position sensor and the audio sensor, and is further used for acquiring the audio signal when the shifting fork position sensor detects the synchronous position of the synchronizer and a preset time after the synchronous position of the synchronizer is detected, and judging whether the synchronizer is abnormal or not according to the audio signal.
2. The transmission synchronizer detection system according to claim 1, wherein the audio sensor comprises a first audio sensor and a second audio sensor;
The first audio sensor is disposed within a first circumferential range from the transmission body; the second audio sensor is arranged outside a second circumferential range from the transmission body;
The control module is respectively in communication connection with the shifting fork position sensor, the first audio sensor and the audio sensor, and is specifically used for acquiring a first audio signal acquired by the first audio sensor and a third audio signal acquired by the second audio sensor when the shifting fork position sensor detects the synchronous position of the synchronizer;
the preset time is reserved after the shifting fork position sensor detects the synchronous position of the synchronizer, and a second audio signal acquired by the first audio sensor and a fourth audio signal acquired by the second audio sensor are acquired;
and judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
3. The transmission synchronizer detection system according to claim 2, further comprising an audio isolator;
The audio isolator is arranged between the first audio sensor and the second audio sensor; the audio isolator is used for blocking the second audio sensor from collecting the first audio signal or the third audio signal; and the first audio sensor is also used for blocking the first audio sensor from collecting the third audio signal or the fourth audio signal.
4. The transmission synchronizer detection system according to claim 2, wherein the audio sensor further comprises a third audio sensor;
The third audio sensor is arranged on one side of a vertical center line between the first audio sensor and the second audio sensor;
The control module is also in communication connection with the third audio sensor and is particularly used for acquiring a fifth audio signal acquired by the third audio sensor when the shifting fork position sensor detects the synchronous position of the synchronizer; the preset time is after the shifting fork position sensor detects the synchronous position of the synchronizer, and a sixth audio signal acquired by the third audio sensor is acquired;
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
5. The transmission synchronizer detection system according to claim 4, wherein the audio sensor further comprises a fourth audio sensor, a fifth audio sensor, a … N-1 audio sensor, and an nth audio sensor;
The fourth audio sensor is arranged on one side of the same distance position as the first audio sensor, the second audio sensor and the third audio sensor;
…；
The nth audio sensor is arranged at one side of the same distance position from the first audio sensor, the second audio sensor, the third audio sensor, the fourth audio sensor, the fifth audio sensor … and the nth-1 audio sensor;
The control module is also in communication connection with the nth audio sensor of the fourth audio sensor …, and is specifically configured to obtain a 2N-1 th audio signal collected by the nth audio sensor when the shift fork position sensor detects the synchronization position of the synchronizer; presetting time after the shifting fork position sensor detects the synchronous position of the synchronizer, and acquiring a 2N audio signal acquired by the N audio sensor;
Judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
6. A synchronizer detection method of a transmission, applied to the synchronizer detection system of a transmission according to any one of claims 1 to 5, characterized in that the synchronizer detection method of a transmission comprises:
The rotation speed of an input shaft of the transmission body is driven to be a first preset rotation speed; the rotation speed of an output shaft of the transmission body is driven to be a second preset rotation speed;
receiving a synchronization position signal of the synchronizer;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time;
Judging whether the synchronizer is abnormal according to the audio signal.
7. The method of synchronizer detection of a transmission according to claim 6, wherein the audio sensor includes a first audio sensor and a second audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
Receiving a first audio signal acquired by the first audio sensor and a third audio signal acquired by the second audio sensor when receiving a synchronous position signal of the synchronizer;
Receiving a second audio signal acquired by the first audio sensor and a fourth audio signal acquired by the second audio sensor when receiving a synchronization position signal preset time of the synchronizer;
judging whether the synchronizer is abnormal according to the audio signal, including:
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the third audio signal and the fourth audio signal.
8. The method of synchronizer detection of a transmission according to claim 7, wherein the audio sensor further comprises a third audio sensor; the third audio sensor is arranged on one side of a vertical center line between the first audio sensor and the second audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
when the synchronous position signal of the synchronizer is received, a first audio signal acquired by the first audio sensor, a third audio signal acquired by the second audio sensor and a fifth audio signal acquired by the third audio sensor are received;
receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor and a sixth audio signal acquired by the third audio sensor when a synchronization position signal of the synchronizer is received for a preset time;
judging whether the synchronizer is abnormal according to the audio signal, including:
judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the fifth audio signal and the sixth audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the fifth audio signal and the sixth audio signal.
9. The method of claim 8, wherein the audio sensor further comprises a fourth audio sensor, a fifth audio sensor, a … N-1 audio sensor, and an nth audio sensor;
The fourth audio sensor is arranged on one side of the same distance position as the first audio sensor, the second audio sensor and the third audio sensor;
…；
The nth audio sensor is arranged at one side of the same distance position from the first audio sensor, the second audio sensor, the third audio sensor, the fourth audio sensor, the fifth audio sensor … and the nth-1 audio sensor;
Receiving the audio signal collected by the audio sensor when the synchronous position signal of the synchronizer is received and when the synchronous position signal of the synchronizer is received for a preset time, comprising:
When the synchronous position signal of the synchronizer is received, a first audio signal collected by the first audio sensor, a third audio signal collected by the second audio sensor, a fifth audio signal collected by the third audio sensor, a seventh audio signal collected by the fourth audio sensor and a 2N-1 audio signal collected by the N audio sensor are received;
Receiving a second audio signal acquired by the first audio sensor, a fourth audio signal acquired by the second audio sensor, a sixth audio signal acquired by the third audio sensor, an eighth audio signal acquired by the fourth audio sensor and a 2N audio signal acquired by the N audio sensor when receiving a synchronization position signal preset time of the synchronizer;
judging whether the synchronizer is abnormal according to the audio signal, including:
Judging whether the synchronizer is abnormal according to the first audio signal, the second audio signal, the 2N audio signal and the 2N-1 audio signal; or judging whether the synchronizer is abnormal according to the third audio signal, the fourth audio signal, the 2N-1 audio signal and the 2N audio signal; or judging whether the synchronizer is abnormal according to the fifth audio signal, the sixth audio signal, the 2N-1 audio signal and the 2N audio signal.
10. The synchronizer detecting method of a transmission according to claim 6, further comprising:
and obtaining the gear speed ratio corresponding to the synchronizer to be tested.
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