CN201955056U - Gap detecting circuit of engine rotation speed sensor - Google Patents
Gap detecting circuit of engine rotation speed sensor Download PDFInfo
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- CN201955056U CN201955056U CN201120053554XU CN201120053554U CN201955056U CN 201955056 U CN201955056 U CN 201955056U CN 201120053554X U CN201120053554X U CN 201120053554XU CN 201120053554 U CN201120053554 U CN 201120053554U CN 201955056 U CN201955056 U CN 201955056U
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Abstract
The utility model discloses a gap detecting circuit of an engine rotation speed sensor, which comprises a main control chip. The gap detecting circuit is characterized in that a rotation speed signal voltage processing circuit is connected to a voltage detecting end of the main control chip, a rotation speed signal pulse processing circuit is connected to a frequency detecting end of the main control chip, and an LCD (Liquid Crystal Display) monitor is connected to a display end module of the main control chip. The utility model has effects of precisely detecting the gap between a rotation speed sensor and a magnetic pack without opening the engine, and realizing the loading detection and no-load detection of the engine. The utility model has the advantages of simple detection operation and flexible project, can be produced as a portable instrument, and can provide high-efficiency support for after-sale service.
Description
Technical field
The utility model belongs to a kind of engine speed sensor gap detection technology, the engine speed sensor gap detection circuit that especially a kind of motorcycle is used.
Background technology
When in-engine magneto generator turned round, its surperficial boss cutting was fixed on the magnetic line of force of the speed probe on next door, has produced the corresponding rotating speeds signal, and this tach signal is the important sensor signal foundation of engine management system.Described speed probe is a magneto-electric.Speed probe is mounted on engine housing or the side cover, adjust when assembled engines in the gap of it and magneto generator, but some alignment error can cause the deviation of signal in actual applications, especially the engine after keeping in repair, tend to have very big skew with initial value, thereby influenced the performance of engine, particularly influenced ignition advance angle and tach signal error in judgement rate.
But the shortcoming of prior art is: the engine speed sensor gap detection circuit that does not also have a kind of motorcycle to use can't detect the gap between speed probe and disk pack rapidly and accurately.
The utility model content
Problem to be solved in the utility model is to provide a kind of engine speed sensor gap detection circuit, under the situation of not opening engine, detects the gap between speed probe and disk pack exactly.
For achieving the above object, the utility model provides a kind of engine speed sensor gap detection circuit, comprise main control chip, its key is, the voltage detecting end of described main control chip is connected with tach signal voltage treatment circuit, the frequency detecting end of main control chip is connected with the tach signal pulse processing circuit, and the display end group of main control chip is connected with LCD display.
Utilizing signals of rotational speed sensor calculated gap size and demonstration. the user only need be drawn out to engine rotational speed signal on the engine speed sensor gap detection circuit, and engine remained under certain rotating speed, get final product its speed probe of real time inspection and magneto generator convex closure gap, need not open engine housing, detecting operation is simple, scheme is flexible, can make portable instrument, provides efficient support to detecting and work after sale before the engine installation.
Voltage of signals and frequency with rotary speed signal sensor in this programme are foundation, the gap length that data form that gets according to experiment and experience are calculated speed probe and magneto generator convex closure, and after by temperature signal this gap length being carried out the coefficient correction, obtain final theoretical gap width, and show gap length, current rotating speed, voltage and Current Temperatures with the LCD1 display screen.
Described tach signal voltage treatment circuit is provided with first amplifier, and the negative input of this first amplifier is connected on an end of the 3rd resistance, and the other end of the 3rd resistance is connected on the reference voltage;
The positive input of described first amplifier is connected on an end of second resistance, and the other end of this second resistance is connected on the tach signal A end of speed probe;
Be serially connected with first resistance between the positive input of described first amplifier and the output terminal, this output terminal also connects the voltage detecting end of described main control chip.
Tach signal voltage treatment circuit is used to detect current magnitude of voltage.
Described tach signal pulse processing circuit is provided with second amplifier, the negative input of this second amplifier is connected on an end of the 7th resistance, the other end of the 7th resistance is connected on the tach signal A end of speed probe, and this tach signal A end is connected on the reference voltage by the 4th resistance;
The positive input of described second amplifier is connected on an end of the 8th resistance, and the other end of the 8th resistance is connected on the tach signal B end of speed probe, and this tach signal B end is connected on the reference voltage by the 5th resistance;
Be serially connected with the 6th resistance between the positive input of described second amplifier and the output terminal, this output terminal also connects the frequency detecting end of described main control chip.
The tach signal pulse processing circuit is used to detect current tachometer value.
The temperature detection end of described main control chip is connected with temperature sensor.
Temperature sensor is used to detect current temperature value.
The display end group of described main control chip is made up of first display end, second display end, the 3rd display end, the 4th display end, and described first display end, second display end, the 3rd display end, the 4th display end are connected on the same LCD display.
The entrucking detection method of described engine speed sensor gap detection circuit: its key is:
At first, the tach signal A of engine speed sensor gap detection circuit and tach signal B are connected respectively to first tap and second tap of speed probe output winding;
Secondly, starting engine and idle;
Main control chip carries out according to the following steps:
Initialization, counter T1=0, T2=0 sets idling speed value speed, sets first set point number and second set point number;
Gather for the first time tach signal cycle t1;
After time-delay a period of time, gather tach signal cycle t2 for the second time;
Whether the absolute value of judging difference between t1 and the t2 in allowed band, judges promptly whether the current rotation of engine is steady;
If the absolute value of difference is outside allowed band between t1 and the t2, i.e. the current rotation of engine is not steady, need return described initialization, and the step of counter T1=0 is gathered once more again;
If the absolute value of difference is in allowed band between t1 and the t2, i.e. the current stability of rotation of engine, then T1=T1+1;
Judge that whether T1 is greater than first set point number;
If T1 is not more than first set point number, then return the step of gathering tach signal cycle t1 the described first time, gather once more;
If T1 is greater than first set point number, then by gathering the value calculation engine rotating speed R of tach signal cycle t2 the described second time;
Judge that whether engine speed R is greater than minimum idle speed value speed;
If engine speed R is not more than minimum idle speed value speed, then return described initialization, the step of counter T1=0 is gathered once more again;
If engine speed R is greater than minimum idle speed value speed;
Gather and write down and read tach signal voltage Vc, the value of gathering tach signal cycle t3 once more, calculation engine rotating speed R;
T2=T2+1
Judge that whether T2 is greater than second set point number;
If T2 is not more than second set point number, then returns described collection and record and read tach signal voltage Vc, the value of gathering tach signal cycle t3 once more, the step of calculation engine rotating speed R;
If T2 greater than second set point number, then averages respectively and record to Vc and the R that obtains in second set point number;
Gather engine Current Temperatures C;
Whether judge Current Temperatures C greater than ceiling temperature value c1, if Current Temperatures C greater than the ceiling temperature value, temperature coefficient K=k1 then;
If Current Temperatures C is less than or equal to the ceiling temperature value, whether judge Current Temperatures C greater than lower-limit temperature value c2,
If Current Temperatures C arrives between the ceiling temperature value in lower-limit temperature value, then temperature coefficient K=k2;
If Current Temperatures C is less than or equal to lower-limit temperature value, temperature coefficient K=k3 then;
The c1=30 degree, c2=5 degree, k1=1.05, k2=1, k3=0.94.
The value of described tach signal voltage Vc is: Vc=Vc * K;
Call rotating speed-voltage-gap table, look into gap S between speed probe and disk pack by Vc, R;
Main control chip drives LCD display and shows S, Vc and R;
Finish.
The unloaded detection method of described engine speed sensor gap detection circuit: its key is:
At first, the tach signal A of engine speed sensor gap detection circuit and tach signal B are connected respectively to first tap and second tap of speed probe output winding;
Secondly, unloaded rolling motor; Pedal or external force mode such as manual make engine rotation.
Main control chip is realized according to the following steps:
Idling speed value speed is set in initialization;
Gather for the first time tach signal cycle t1;
After time-delay a period of time, gather tach signal cycle t2 for the second time;
Judge that whether t2 is greater than t1;
If t2 greater than t1, then writes down t2, and read tach signal voltage Vc, make t1=t2, return the described t2 of judgement whether greater than the step of t1;
If t2 is not more than t1, then pass through the value calculation engine rotating speed R of t2;
Judge that whether R is greater than speed;
If R is less than or equal to speed, then return the step of gathering tach signal cycle t1 the described first time;
If R, then gathers engine Current Temperatures C greater than speed;
Whether judge Current Temperatures C greater than ceiling temperature value c1, if Current Temperatures C greater than the ceiling temperature value, temperature coefficient K=k1 then;
If Current Temperatures C is less than or equal to the ceiling temperature value, whether judge Current Temperatures C greater than lower-limit temperature value c2,
If Current Temperatures C arrives between the ceiling temperature value in lower-limit temperature value, then temperature coefficient K=k2;
If Current Temperatures C equals lower-limit temperature value less than obtaining, then temperature coefficient K=k3;
The c1=30 degree, c2=5 degree, k1=1.05, k2=1, k3=0.94.
The value of described tach signal voltage Vc is: Vc=Vc * K;
Call rotating speed-voltage-gap table, look into gap S between speed probe and disk pack by Vc, R;
Main control chip drives LCD display and shows S, Vc and R;
Return the step of gathering tach signal cycle t1 the described first time.
This program major function is engine need not be sent out combustion, directly starts with pin startup or electricity to make engine rotation once, and the engine speed sensor gap detection circuit will catch sensor gap and show automatically.
Be basis for estimation with the maximum (top) speed and the voltage of catching in this flow process,, read actual speed probe and magneto generator convex closure gap according to the unloaded relation table that detects rotating speed R-voltage Vc-gap S of engine.
Effect of the present utility model is: a kind of engine speed sensor gap detection circuit under the situation of not opening engine, detects the gap between speed probe and disk pack exactly.Realize the unloaded detection of engine entrucking detection and engine.The utility model detecting operation is simple, and scheme is flexible, can make portable instrument, and efficient support is provided working after sale.
Description of drawings
Fig. 1 is the circuit diagram of engine speed sensor gap detection circuit;
The process flow diagram that Fig. 2 detects for the utility model entrucking;
Fig. 3 is the unloaded process flow diagram that detects of the utility model;
Fig. 4 detects the relation table synoptic diagram of rotating speed R-voltage Vc-gap S for the engine entrucking;
Fig. 5 is the unloaded relation table synoptic diagram that detects rotating speed R-voltage Vc-gap S of engine.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of engine speed sensor gap detection circuit, comprise main control chip U1, its key is, the voltage detecting end of described main control chip U1 is connected with tach signal voltage treatment circuit, the frequency detecting end of main control chip U1 is connected with the tach signal pulse processing circuit, and the display end group of main control chip U1 is connected with LCD display.
Utilizing signals of rotational speed sensor calculated gap size and demonstration. the user only need be drawn out to engine rotational speed signal on the engine speed sensor gap detection circuit, and engine remained under certain rotating speed, get final product its speed probe of real time inspection and magneto generator convex closure gap, need not open engine housing, detecting operation is simple, scheme is flexible, can make portable instrument, provides efficient support to detecting and work after sale before the engine installation.
Voltage of signals and frequency with rotary speed signal sensor in this programme are foundation, the gap length that data form that gets according to experiment and experience are calculated speed probe and magneto generator convex closure, and after by temperature signal this gap length being carried out the coefficient correction, obtain final theoretical gap width, and show gap length, current rotating speed, voltage and Current Temperatures with the LCD1 display screen.
Described tach signal voltage treatment circuit is provided with the first amplifier IC1, and the negative input of this first amplifier IC1 is connected on an end of the 3rd resistance R 3, and the other end of the 3rd resistance R 3 is connected on the reference voltage;
The positive input of the described first amplifier IC1 is connected on an end of second resistance R 2, and the other end of this second resistance R 2 is connected on the tach signal A end of speed probe;
Be serially connected with first resistance R 1 between the positive input of the described first amplifier IC1 and the output terminal, this output terminal also connects the voltage detecting end of described main control chip U1.
Tach signal voltage treatment circuit is used to detect current magnitude of voltage.
Described tach signal pulse processing circuit is provided with the second amplifier IC2, the negative input of this second amplifier IC2 is connected on an end of the 7th resistance R 7, the other end of the 7th resistance R 7 is connected on the tach signal A end of speed probe, and this tach signal A end is connected on the reference voltage by the 4th resistance R 4;
The positive input of the described second amplifier IC2 is connected on an end of the 8th resistance R 8, and the other end of the 8th resistance R 8 is connected on the tach signal B end of speed probe, and this tach signal B end is connected on the reference voltage by the 5th resistance R 5;
Be serially connected with the 6th resistance R 6 between the positive input of the described second amplifier IC2 and the output terminal, this output terminal also connects the frequency detecting end of described main control chip U1.
The tach signal pulse processing circuit is used to detect current tachometer value.
The temperature detection end of described main control chip U1 is connected with temperature sensor.
Temperature sensor is used to detect current temperature value.
The display end group of described main control chip U1 is made up of the first display end LCD1, the second display end LCD2, the 3rd display end LCD3, the 4th display end LCD4, and the described first display end LCD1, the second display end LCD2, the 3rd display end LCD3, the 4th display end LCD4 are connected on the same LCD display.
Shown in Fig. 2,4, the entrucking detection method of described engine speed sensor gap detection circuit: its key is:
At first, the tach signal A of engine speed sensor gap detection circuit and tach signal B are connected respectively to first tap and second tap of speed probe output winding;
Secondly, idling starting engine;
Main control chip U1 carries out according to the following steps:
Initialization, counter T1=0, T2=0 sets idling speed value speed, sets first set point number and second set point number;
Gather for the first time tach signal cycle t1;
After time-delay a period of time, gather tach signal cycle t2 for the second time;
Whether the absolute value of judging difference between t1 and the t2 in allowed band, judges promptly whether the current rotation of engine is steady;
If the absolute value of difference is outside allowed band between t1 and the t2, i.e. the current rotation of engine is not steady, need return described initialization, and the step of counter T1=0 is gathered once more again;
If the absolute value of difference is in allowed band between t1 and the t2, i.e. the current stability of rotation of engine, then T1=T1+1;
Judge that whether T1 is greater than first set point number;
If T1 is not more than first set point number, then return the step of gathering tach signal cycle t1 the described first time, gather once more;
If T1 is greater than first set point number, then by gathering the value calculation engine rotating speed R of tach signal cycle t2 the described second time;
Judge that whether engine speed R is greater than minimum idle speed value speed;
If engine speed R is not more than minimum idle speed value speed, then return described initialization, the step of counter T1=0 is gathered once more again;
If engine speed R is greater than minimum idle speed value speed;
Gather and write down and read tach signal voltage Vc, the value of gathering tach signal cycle t3 once more, calculation engine rotating speed R;
T2=T2+1
Judge that whether T2 is greater than second set point number;
If T2 is not more than second set point number, then returns described collection and record and read tach signal voltage Vc, the value of gathering tach signal cycle t3 once more, the step of calculation engine rotating speed R;
If T2 greater than second set point number, then averages respectively and record to Vc and the R that obtains in second set point number;
Gather engine Current Temperatures C;
Whether judge Current Temperatures C greater than ceiling temperature value c1, if Current Temperatures C greater than the ceiling temperature value, temperature coefficient K=k1 then;
If Current Temperatures C is less than or equal to the ceiling temperature value, whether judge Current Temperatures C greater than lower-limit temperature value c2,
If Current Temperatures C arrives between the ceiling temperature value in lower-limit temperature value, then temperature coefficient K=k2;
If Current Temperatures C is less than or equal to lower-limit temperature value, temperature coefficient K=k3 then;
The c1=30 degree, c2=5 degree, k1=1.05, k2=1, k3=0.94.
The value of described tach signal voltage Vc is: Vc=Vc * K;
Call rotating speed-voltage-gap table, look into gap S between speed probe and disk pack by Vc, R;
Main control chip U1 drives LCD display and shows S, Vc and R;
Finish.
Shown in Fig. 3,5, the unloaded detection method of described engine speed sensor gap detection circuit: its key is:
At first, the tach signal A of engine speed sensor gap detection circuit and tach signal B are connected respectively to first tap and second tap of speed probe output winding;
Secondly, unloaded rolling motor; Pedal or external force mode such as manual make engine rotation.
Main control chip U1 realizes according to the following steps:
Idling speed value speed is set in initialization;
Gather for the first time tach signal cycle t1;
After time-delay a period of time, gather tach signal cycle t2 for the second time;
Judge that whether t2 is greater than t1;
If t2 greater than t1, then writes down t2, and read tach signal voltage Vc, make t1=t2, return the described t2 of judgement whether greater than the step of t1;
If t2 is not more than t1, then pass through the value calculation engine rotating speed R of t2;
Judge that whether R is greater than speed;
If R is less than or equal to speed, then return the step of gathering tach signal cycle t1 the described first time;
If R, then gathers engine Current Temperatures C greater than speed;
Whether judge Current Temperatures C greater than ceiling temperature value c1, if Current Temperatures C greater than the ceiling temperature value, temperature coefficient K=k1 then;
If Current Temperatures C is less than or equal to the ceiling temperature value, whether judge Current Temperatures C greater than lower-limit temperature value c2,
If Current Temperatures C arrives between the ceiling temperature value in lower-limit temperature value, then temperature coefficient K=k2;
If Current Temperatures C equals lower-limit temperature value less than obtaining, then temperature coefficient K=k3;
The c1=30 degree, c2=5 degree, k1=1.05, k2=1, k3=0.94.
The value of described tach signal voltage Vc is: Vc=Vc * K;
Call rotating speed-voltage-gap table, look into gap S between speed probe and disk pack by Vc, R;
Main control chip U1 drives LCD display and shows S, Vc and R;
Return the step of gathering tach signal cycle t1 the described first time.
Claims (5)
1. engine speed sensor gap detection circuit, comprise main control chip (U1), it is characterized in that, the voltage detecting end of described main control chip (U1) is connected with tach signal voltage treatment circuit, the frequency detecting end of main control chip (U1) is connected with the tach signal pulse processing circuit, and the display end group of main control chip (U1) is connected with LCD display.
2. according to the described engine speed sensor gap detection circuit of claim 1, it is characterized in that: described tach signal voltage treatment circuit is provided with first amplifier (IC1), the negative input of this first amplifier (IC1) is connected on an end of the 3rd resistance (R3), and the other end of the 3rd resistance (R3) is connected on the reference voltage;
The positive input of described first amplifier (IC1) is connected on an end of second resistance (R2), and the other end of this second resistance (R2) is connected on the tach signal A end of speed probe;
Be serially connected with first resistance (R1) between the positive input of described first amplifier (IC1) and the output terminal, this output terminal also connects the voltage detecting end of described main control chip (U1).
3. according to the described engine speed sensor gap detection circuit of claim 1, it is characterized in that: described tach signal pulse processing circuit is provided with second amplifier (IC2), the negative input of this second amplifier (IC2) is connected on an end of the 7th resistance (R7), the other end of the 7th resistance (R7) is connected on the tach signal A end of speed probe, and this tach signal A end is connected on the reference voltage by the 4th resistance (R4);
The positive input of described second amplifier (IC2) is connected on an end of the 8th resistance (R8), and the other end of the 8th resistance (R8) is connected on the tach signal B end of speed probe, and this tach signal B end is connected on the reference voltage by the 5th resistance (R5);
Be serially connected with the 6th resistance (R6) between the positive input of described second amplifier (IC2) and the output terminal, this output terminal also connects the frequency detecting end of described main control chip (U1).
4. according to the described engine speed sensor gap detection circuit of claim 1, it is characterized in that: the temperature detection end of described main control chip (U1) is connected with temperature sensor.
5. according to the described engine speed sensor gap detection circuit of claim 1, it is characterized in that: the display end group of described main control chip (U1) is made up of first display end (LCD1), second display end (LCD2), the 3rd display end (LCD3), the 4th display end (LCD4), and described first display end (LCD1), second display end (LCD2), the 3rd display end (LCD3), the 4th display end (LCD4) are connected on the same LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120053554XU CN201955056U (en) | 2011-03-03 | 2011-03-03 | Gap detecting circuit of engine rotation speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120053554XU CN201955056U (en) | 2011-03-03 | 2011-03-03 | Gap detecting circuit of engine rotation speed sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201955056U true CN201955056U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120053554XU Expired - Lifetime CN201955056U (en) | 2011-03-03 | 2011-03-03 | Gap detecting circuit of engine rotation speed sensor |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183199A (en) * | 2011-03-03 | 2011-09-14 | 力帆实业(集团)股份有限公司 | Engine speed sensor gap detection circuit and loading detection method |
| CN102183200A (en) * | 2011-03-03 | 2011-09-14 | 力帆实业(集团)股份有限公司 | Gap detecting circuit for engine speed sensor and no-load detecting method thereof |
-
2011
- 2011-03-03 CN CN201120053554XU patent/CN201955056U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183199A (en) * | 2011-03-03 | 2011-09-14 | 力帆实业(集团)股份有限公司 | Engine speed sensor gap detection circuit and loading detection method |
| CN102183200A (en) * | 2011-03-03 | 2011-09-14 | 力帆实业(集团)股份有限公司 | Gap detecting circuit for engine speed sensor and no-load detecting method thereof |
| CN102183199B (en) * | 2011-03-03 | 2013-03-20 | 力帆实业(集团)股份有限公司 | Engine speed sensor gap detection circuit and loading detection method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110831 Effective date of abandoning: 20130320 |
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| RGAV | Abandon patent right to avoid regrant |