CN111636990B - Signal processing device, signal processing apparatus, vehicle, and signal processing method - Google Patents
Signal processing device, signal processing apparatus, vehicle, and signal processing method Download PDFInfo
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- CN111636990B CN111636990B CN202010482956.5A CN202010482956A CN111636990B CN 111636990 B CN111636990 B CN 111636990B CN 202010482956 A CN202010482956 A CN 202010482956A CN 111636990 B CN111636990 B CN 111636990B
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- signal
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- crankshaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
- F02P11/06—Indicating unsafe conditions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention provides a signal processing device, signal processing equipment, a vehicle and a signal processing method, wherein the signal processing device comprises an isolation circuit, a voltage division circuit, a voltage stabilizing circuit, a filter circuit, a coupling circuit and a control chip; the first end of the isolation circuit is electrically connected with the signal input end, and the second end of the isolation circuit is electrically connected with the first end of the voltage division circuit; the second end of the voltage division circuit is electrically connected with the first node, and the third end of the voltage division circuit is electrically connected with the second node; the first end of the voltage stabilizing circuit is electrically connected with the first node, and the second end of the voltage stabilizing circuit is electrically connected with the second node; the first end of the filter circuit is electrically connected with the first node, and the second end of the filter circuit is electrically connected with the second node; the first end of the coupling circuit is electrically connected with the first node, and the second end of the coupling circuit is electrically connected with the input end of the control chip. The method and the device are beneficial to correctly judging the rotating speed of the engine and the position information of the crankshaft, and improve the possibility of normal running of the vehicle.
Description
Technical Field
The present invention relates to the field of vehicles, and in particular, to a signal processing apparatus, a signal processing device, a vehicle, and a signal processing method.
Background
In an electronic ignition control system of an engine of a vehicle, a crank position (CKP-7X) sensor is generally installed on the right side of an engine cylinder block to sense a signal of a pairing signal panel, transmit engine speed and crank position information to an ignition control module, and the ignition control module recognizes a correct ignition sequence and then controls an ignition coil to ignite according to a prescribed sequence.
The signal disc is a special magnetic resistance wheel processed on the crankshaft, seven cutting grooves are processed on the signal disc, six cutting grooves are evenly distributed at intervals of 60 degrees, and the seventh cutting groove is 10 degrees in front of the sixth cutting groove, as shown in figure 1. The seventh slot is also called a synchronization slot, and the crankshaft position (CKP-7X) sensor can only transmit an engine speed signal to the ignition module without knowing the position information of the crankshaft without the synchronization slot. When the crankshaft rotates, the signal disc is driven to rotate together, and a crankshaft position and rotating speed signal is sensed in a crankshaft position (CKP-7X) sensor. Because the crankshaft generates seven pulse signals every revolution, it is also called as 7X signal.
However, in practical application, due to aging and abrasion of the signal panel, other defective slots appear outside the seven slots, so that interference signals are generated, signals received by the ignition module are abnormal, the engine speed and the crankshaft position information cannot be correctly judged, and ignition is abnormal.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a signal processing apparatus, a signal processing device, a vehicle, and a signal processing method, which are used to reduce the possibility of ignition abnormality caused by interference signals generated by signal panel abrasion. The specific technical scheme is as follows:
in a first aspect, the present invention provides a signal processing apparatus, which includes an isolation circuit, a voltage divider circuit, a voltage regulator circuit, a filter circuit, a coupling circuit, and a control chip;
the first end of the isolation circuit is electrically connected with the signal input end, and the second end of the isolation circuit is electrically connected with the first end of the voltage division circuit;
the second end of the voltage division circuit is electrically connected with the first node, and the third end of the voltage division circuit is electrically connected with the second node;
the first end of the voltage stabilizing circuit is electrically connected with the first node, and the second end of the voltage stabilizing circuit is electrically connected with the second node;
a first end of the filter circuit is electrically connected with the first node, and a second end of the filter circuit is electrically connected with the second node;
a first end of the coupling circuit is electrically connected with the first node, and a second end of the coupling circuit is electrically connected with an input end of the control chip;
the control chip is electrically connected with the second node, and the output end of the control chip is used for outputting a filtered signal;
the second node is grounded.
Optionally, the isolation circuit includes a first diode, an anode of the first diode is electrically connected to the signal input terminal, and a cathode of the first diode is electrically connected to the first end of the voltage divider circuit.
Optionally, the voltage dividing circuit includes a first resistor and a second resistor, a first end of the first resistor is electrically connected to the second end of the isolation circuit, a first end of the second resistor is electrically connected to the first node, and a third end of the second resistor is electrically connected to the second node.
Optionally, the voltage stabilizing circuit includes a second diode, a cathode of the second diode is electrically connected to the first node, and a second end of an anode of the second diode is electrically connected to the second node.
Optionally, the filter circuit includes a first capacitor, and two ends of the first capacitor are electrically connected to the first node and the second node, respectively.
Optionally, the coupling circuit includes a third resistor, a first end of the third resistor is electrically connected to the first node, and a second end of the third resistor is electrically connected to the input end of the control chip.
In a second aspect, the present invention provides a signal processing apparatus, including a crankshaft signal sensor, a crankshaft signal processing device, and a main control chip, where the crankshaft signal sensor is configured to acquire a crankshaft signal, and the crankshaft signal sensor, the crankshaft signal processing device, and the main control chip are sequentially and electrically connected to each other, and the apparatus is characterized by further including a signal error detection device, where the error signal detection device is any one of the signal processing devices, the error signal detection device is respectively and electrically connected to the crankshaft signal sensor and the main control chip, and the main control chip is configured to generate a crankshaft position information signal according to the crankshaft signal detected by the crankshaft signal processing device and the error signal detection device.
In a third aspect, the invention provides a vehicle comprising a signal processing apparatus as described above.
In a fourth aspect, the present invention provides a signal processing method applied to the vehicle described above, including the steps of:
obtaining a first signal by using a crankshaft signal detected by the crankshaft signal sensor of the crankshaft signal processing device;
processing the crankshaft signal detected by the crankshaft signal sensor by using the signal error detection device to obtain a second signal;
comparing the amplitudes of the first and second signals;
if the amplitude difference value of the first signal and the second signal is smaller than a preset threshold value, confirming that the crankshaft signal detected by the crankshaft signal sensor is normal;
and if the amplitude difference value of the first signal and the second signal is not smaller than the preset threshold value, confirming that the crankshaft signal detected by the crankshaft signal sensor is an interference signal and eliminating the interference signal.
The signal processing device provided by the invention can process the signal by arranging the isolation circuit, the voltage division circuit, the voltage stabilizing circuit, the filter circuit, the coupling circuit and the control chip, and then compares the processing result with the normal processing result to determine whether the detected signal is abnormal or not, so that interference signals generated by factors such as gear abrasion and the like are eliminated, the accurate judgment of the rotating speed of the engine and the position information of the crankshaft is facilitated, and the possibility of the normal running of the vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a circuit diagram of a signal processing device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a signal processing device, which comprises an isolation circuit, a voltage division circuit, a voltage stabilizing circuit, a filter circuit, a coupling circuit and a control chip U1, as shown in figure 1.
The first end of the isolation circuit is electrically connected with the signal input end, and the second end of the isolation circuit is electrically connected with the first end of the voltage division circuit;
the second end of the voltage division circuit is electrically connected with a first node N1, and the third end of the voltage division circuit is electrically connected with a second node N2;
the first end of the voltage stabilizing circuit is electrically connected with the first node N1, and the second end of the voltage stabilizing circuit is electrically connected with the second node N2;
a first end of the filter circuit is electrically connected with a first node N1, and a second end of the filter circuit is electrically connected with a second node N2;
the first end of the coupling circuit is electrically connected with the first node N1, and the second end of the coupling circuit is electrically connected with the input end of the control chip U1;
the control chip U1 is electrically connected with the second node N2, and the output end of the control chip U1 is used for outputting a filtered signal;
the second node N2 is grounded.
The control chip U1 is configured to collect and output amplitude information of the signal, and when the signal is implemented, a suitable chip may be selected according to actual needs.
The signal processing device provided by the invention can process the signals by arranging the isolation circuit, the voltage division circuit, the voltage stabilizing circuit, the filter circuit, the coupling circuit and the control chip U1, and then compares the processing result with the normal processing result to determine whether the detected signals are abnormal or not, so that interference signals generated by factors such as gear abrasion and the like are eliminated, the accurate judgment of the engine speed and the crankshaft position information is facilitated, and the possibility of the normal running of the vehicle is improved.
Optionally, the isolation circuit includes a first diode D1, an anode of the first diode D1 is electrically connected to the signal input terminal, and a cathode of the first diode D1 is electrically connected to the first terminal of the voltage divider circuit. The first diode D1 is mainly used to isolate the negative voltage of the 7X signal, that is, the negative voltage of the input signal.
Optionally, the voltage divider circuit includes a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is electrically connected to a second end of the isolation circuit, a first end of the second resistor R2 is electrically connected to a first node N1, and a third end of the second resistor R2 is electrically connected to a second node N2. The voltage division circuit mainly has the function of voltage division so as to realize the adjustment of the voltage of the electric signal input into the subsequent circuit.
Optionally, the voltage stabilizing circuit includes a second diode D2, a cathode of the second diode D2 is electrically connected to the first node N1, and an anode second terminal of the second diode D2 is electrically connected to the second node N2. The voltage stabilizing circuit is connected with a ground wire to play a role in stabilizing voltage and can control the maximum voltage amplitude input to the control chip U1.
Optionally, the filter circuit includes a first capacitor C1, and two ends of the first capacitor C1 are electrically connected to the first node N1 and the second node N2, respectively.
Optionally, the coupling circuit includes a third resistor R3, a first end of the third resistor R3 is electrically connected to the first node N1, and a second end of the third resistor R3 is electrically connected to an input terminal of the control chip U1.
By arranging the circuits, the amplitude of the signal input to the control chip U1 can be controlled within a specified range, for example, between 0 and 5V, and the control chip U1 can effectively acquire the amplitude information of the 7X signal.
In a second aspect, the present invention provides a signal processing apparatus, including a crankshaft signal sensor, a crankshaft signal processing device, and a main control chip, where the crankshaft signal sensor is configured to acquire a crankshaft signal, the crankshaft signal sensor, the crankshaft signal processing device, and the main control chip are sequentially and electrically connected, and further including a signal error detection device, where the error signal detection device is any one of the signal processing devices, the error signal detection device is respectively and electrically connected with the crankshaft signal sensor and the main control chip, and the main control chip is configured to generate a crankshaft position information signal according to the crankshaft signal detected by the crankshaft signal processing device and the error signal detection device.
The structures not described in detail in this embodiment can refer to related technologies, and are not described herein again.
The invention is mainly different from the related art in that the invention is also provided with an error detection device to identify the interference signal by comparing the amplitude relation of adjacent pulse signals, and reduce the adverse effect caused by the interference signal due to the gear wear.
In a third aspect, the invention provides a vehicle comprising a signal processing apparatus as described above.
Since the technical solution of this embodiment includes all technical solutions of the above embodiments, at least all technical effects can be achieved, and details are not described here.
In a fourth aspect, the present invention provides a signal processing method applied to the vehicle described above, including the steps of:
obtaining a first signal by using a crankshaft signal detected by the crankshaft signal sensor of the crankshaft signal processing device;
processing the crankshaft signal detected by the crankshaft signal sensor by using the signal error detection device to obtain a second signal;
comparing the amplitudes of the first and second signals;
if the amplitude difference value of the first signal and the second signal is smaller than a preset threshold value, confirming that the crankshaft signal detected by the crankshaft signal sensor is normal;
and if the amplitude difference value of the first signal and the second signal is not smaller than the preset threshold value, confirming that the crankshaft signal detected by the crankshaft signal sensor is an interference signal and eliminating the interference signal.
It can be summarized that the technical solution of the present embodiment obtains a first signal by processing the crank signal detected by the crank signal sensor by the crank signal processing device, obtains a second signal by processing the crank signal detected by the crank signal sensor by the signal error detecting device, and further verifies whether the detected crank signal is the interference signal by comparing the first signal with the second signal.
Specifically, after receiving the signal, the signal amplitude at each moment is captured continuously, and the maximum amplitude of the signal is determined according to the captured amplitude. Specifically, if the signal amplitude at a certain time is greater than the historical maximum amplitude, the value is given to the historical maximum amplitude, and thus, the final historical maximum amplitude is determined as the signal amplitude.
And then determining whether the current signal is a rising edge or a falling edge, if so, filtering the signal, copying a flag bit of the current edge of the signal after successful filtering, and further capturing the falling edge signal.
When a falling edge signal is collected, firstly, filtering the signal, reading the amplitude of the signal after the filtering is successful to determine whether the signal is an abnormal signal, if the amplitude is in a normal range, the signal is a normal signal, and if the amplitude is in a reverse range, the signal is an abnormal signal. And if the acquired signals are all abnormal signals in one period, updating the comparison sample. Finally, the acquired normal signal enables the ignition logic, at which point the possibility of normal engine operation can be increased, and if not the normal signal is acquired, at which point further testing is required until the normal signal is detected.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A signal processing method is characterized by being applied to a vehicle, the vehicle comprises a signal processing device, the signal processing device comprises a crankshaft signal sensor, a crankshaft signal processing device and a main control chip, the crankshaft signal sensor is used for collecting crankshaft signals, the crankshaft signal sensor, the crankshaft signal processing device and the main control chip are sequentially and electrically connected, the signal processing device further comprises a signal error detection device, the error signal detection device is respectively and electrically connected with the crankshaft signal sensor and the main control chip, the main control chip is used for generating crankshaft position information signals according to the crankshaft signals detected by the crankshaft signal processing device and the error signal detection device,
the method comprises the following steps:
obtaining a first signal by using a crankshaft signal detected by the crankshaft signal sensor;
processing the crankshaft signal detected by the crankshaft signal sensor by using the signal error detection device to obtain a second signal;
comparing the amplitudes of the first and second signals;
confirming the crankshaft signal sensing if the amplitude difference of the first signal and the second signal is less than a preset threshold value
The crankshaft signal detected by the device is normal;
and if the amplitude difference value of the first signal and the second signal is not smaller than the preset threshold value, confirming that the crankshaft signal detected by the crankshaft signal sensor is an interference signal and eliminating the interference signal.
2. The signal processing method of claim 1, wherein the error signal detecting means includes an isolation circuit, a voltage dividing circuit, a voltage stabilizing circuit, a filter circuit, a coupling circuit, and a control chip;
the first end of the isolation circuit is electrically connected with the signal input end, and the second end of the isolation circuit is electrically connected with the first end of the voltage division circuit;
the second end of the voltage division circuit is electrically connected with the first node, and the third end of the voltage division circuit is electrically connected with the second node;
the first end of the voltage stabilizing circuit is electrically connected with the first node, and the second end of the voltage stabilizing circuit is electrically connected with the second node;
a first end of the filter circuit is electrically connected with the first node, and a second end of the filter circuit is electrically connected with the second node;
a first end of the coupling circuit is electrically connected with the first node, and a second end of the coupling circuit is electrically connected with an input end of the control chip;
the control chip is electrically connected with the second node, and the output end of the control chip is used for outputting a filtered signal;
the second node is grounded.
3. The signal processing method of claim 2, wherein the isolation circuit comprises a first diode, an anode of the first diode is electrically connected to the signal input terminal, and a cathode of the first diode is electrically connected to the first terminal of the voltage divider circuit.
4. The signal processing method of claim 2, wherein the voltage divider circuit comprises a first resistor and a second resistor, a first end of the first resistor is electrically connected to the second end of the isolation circuit, a first end of the second resistor is electrically connected to a first node, and a third end of the second resistor is electrically connected to a second node.
5. The signal processing method of claim 2, wherein the voltage regulator circuit includes a second diode, a cathode of the second diode being electrically connected to the first node, and an anode of the second diode being electrically connected to the second node.
6. The signal processing method according to claim 2, wherein the filter circuit includes a first capacitor, and both ends of the first capacitor are electrically connected to the first node and the second node, respectively.
7. The signal processing method of claim 2, wherein the coupling circuit comprises a third resistor, a first end of the third resistor is electrically connected to the first node, and a second end of the third resistor is electrically connected to the input terminal of the control chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010482956.5A CN111636990B (en) | 2020-06-01 | 2020-06-01 | Signal processing device, signal processing apparatus, vehicle, and signal processing method |
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| CN202010482956.5A CN111636990B (en) | 2020-06-01 | 2020-06-01 | Signal processing device, signal processing apparatus, vehicle, and signal processing method |
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| CN111636990A CN111636990A (en) | 2020-09-08 |
| CN111636990B true CN111636990B (en) | 2022-03-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62151705A (en) * | 1985-12-26 | 1987-07-06 | Fujitsu Ten Ltd | Processing circuit for crank angle sensor signal |
| CN1190701A (en) * | 1996-12-27 | 1998-08-19 | 本田技研工业株式会社 | Ignition controller for vehicle |
| US5815827A (en) * | 1995-05-15 | 1998-09-29 | Unisia Jecs Corporation | Crank angle signal processing apparatus |
| CN201137527Y (en) * | 2008-01-07 | 2008-10-22 | 华夏龙晖（北京）汽车电子科技有限公司 | Engine electric control unit |
| CN201292889Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Crankshaft signal processor |
| CN201687588U (en) * | 2010-03-03 | 2010-12-29 | 中国一拖集团有限公司 | Signal processing circuit of diesel engine monoblock pump |
| CN104088711A (en) * | 2014-06-12 | 2014-10-08 | 北京立诚方源汽车科技有限公司 | Electrical control management unit for engine fuel gas |
-
2020
- 2020-06-01 CN CN202010482956.5A patent/CN111636990B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62151705A (en) * | 1985-12-26 | 1987-07-06 | Fujitsu Ten Ltd | Processing circuit for crank angle sensor signal |
| US5815827A (en) * | 1995-05-15 | 1998-09-29 | Unisia Jecs Corporation | Crank angle signal processing apparatus |
| CN1190701A (en) * | 1996-12-27 | 1998-08-19 | 本田技研工业株式会社 | Ignition controller for vehicle |
| CN201137527Y (en) * | 2008-01-07 | 2008-10-22 | 华夏龙晖（北京）汽车电子科技有限公司 | Engine electric control unit |
| CN201292889Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Crankshaft signal processor |
| CN201687588U (en) * | 2010-03-03 | 2010-12-29 | 中国一拖集团有限公司 | Signal processing circuit of diesel engine monoblock pump |
| CN104088711A (en) * | 2014-06-12 | 2014-10-08 | 北京立诚方源汽车科技有限公司 | Electrical control management unit for engine fuel gas |
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Effective date of registration: 20220211 Address after: 518000 6th floor, building 3, Beishan Industrial Zone, Beishan Avenue, Yantian District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN JIANKE ELECTRONICS Co.,Ltd. Address before: No.10 Hangkong Road, Wangcheng economic and Technological Development Zone, Changsha, Hunan 410000 Applicant before: SHENZHEN JIANKE ELECTRONICS CO.,LTD. |
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