CN107064537B - Engine speed indicator signal processing apparatus - Google Patents
Engine speed indicator signal processing apparatus Download PDFInfo
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- CN107064537B CN107064537B CN201710143973.4A CN201710143973A CN107064537B CN 107064537 B CN107064537 B CN 107064537B CN 201710143973 A CN201710143973 A CN 201710143973A CN 107064537 B CN107064537 B CN 107064537B
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- Prior art keywords
- foot
- operational amplifier
- resistance
- high speed
- photo coupling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
Abstract
The present invention relates to a kind of engine pack, specifically engine speed indicator signal processing apparatus.It includes operational amplifier, high speed photo coupling and phase inverter.Its main feature is that the operational amplifier is single supply operational amplifier, and it has positive input pin, cathode input pin, the first grounding leg, power input foot and output pin, the high speed photo coupling has the first empty foot, the second empty foot, input anode foot, input cathode foot, output end power foot, enabled foot, open-drain output foot and the second grounding leg.The processing unit can guarantee that the processing result of generator central processing unit is accurate, and manufacturing cost is lower.
Description
Technical field
The present invention relates to a kind of engine pack, specifically engine speed indicator signal processing apparatus.
Background technique
It is well known that can all configure engine speed indicator in the equipment such as automobile, motorcycle is used to refer to engine speed model
It encloses, and engine is reacted whether normal operation with this.Can all it be arranged in engine speed indicator for handling engine speed sensing
The tach signal of device detection, and by the device of treated signal passes to engine central processing unit.
Currently, the revolution counter signal processing apparatus in engine includes dual power supply operational amplifier and high speed photo coupling.For
Guarantee the precision of the signal output of dual power supply operational amplifier, dual power supply operational amplifier needs to connect current potential at work
Device, potentiometer that is, in the case where no external signal inputs, transport dual power supply for carrying out zeroing processing to dual power supply amplifier
Calculating amplifier out voltage is zero.However, potentiometer in different environments (temperature, humidity different) to will appear resistance value inclined
Difference, so that zeroing inaccuracy, to influence the processing of signal, leading to that treated, signal is fluctuated, and then influences engine
The processing result of central processing unit, so that processing result is inaccurate.Moreover, dual power supply operational amplifier needs two power supply moulds
Block, power module is more, and manufacturing cost is high.
Summary of the invention
The present invention is to solve a kind of engine speed indicator signal processing apparatus, which can guarantee generator
The processing result of central processing unit is accurate, and manufacturing cost is lower.
To solve the above problems, the following technical schemes are provided:
Engine speed indicator signal processing apparatus of the invention includes operational amplifier and high speed photo coupling.Its main feature is that institute
Stating operational amplifier is single supply operational amplifier, and it has positive input pin, cathode input pin, the first grounding leg, power supply defeated
Enter foot and output pin, the high speed photo coupling has the first empty foot, the second empty foot, input anode foot, input cathode foot, output end
Supply pin, enabled foot, open-drain output foot and the second grounding leg.The cathode input pin of the operational amplifier is successively gone here and there by conducting wire
For being connected with the speed probe of engine after connection first resistor, second resistance and the first transformer, operational amplifier is just
Pole input pin is grounded after being sequentially connected in series 3rd resistor, the 4th resistance and the second transformer by conducting wire, from second resistance to first
That section lead between resistance and it is parallel with first capacitor and two one after another from the second transformer between that section lead the 4th resistance
Grade pipe, the first grounding leg ground connection of operational amplifier, the power input foot of operational amplifier are connected with the first power supply, operation amplifier
The power input foot of device is connected by the 5th resistance with second source by the second capacity earth, the output pin of operational amplifier,
The 6th resistance and the 7th resistance, the output pin of operational amplifier are sequentially connected in series between the output pin of operational amplifier and positive input pin
It is connected by the 8th resistance with the input cathode foot of high speed photo coupling, the input cathode foot of high speed photo coupling is connected with third capacitor
After be grounded, the input anode foot of high speed photo coupling is connected by the 9th resistance with third power supply, the second grounding leg of high speed photo coupling
Ground connection, the output end power foot of high speed photo coupling are connected with the 4th power supply, and the enabled foot of high speed photo coupling passes through the tenth resistance and the 4th
Power supply is connected, and the open-drain output foot of high speed photo coupling is connected by eleventh resistor with the 4th power supply, and the 4th power supply passes through the 4th electricity
Hold ground connection, the open-drain output foot of high speed photo coupling is sequentially connected in series twelfth resistor, the first phase inverter and the second phase inverter by conducting wire
Afterwards for being connected with the central processing unit of engine, that section lead between the first phase inverter and twelfth resistor passes through the 5th electricity
Hold ground connection.
Wherein, first phase inverter and the second phase inverter are schmitt inverter.
The resistance that 5th resistance is 1000 ohm, the capacity of second capacitor are 0.1uf.
The above scheme has the following advantages:
Since the operational amplifier of engine speed indicator of the invention signal processing apparatus is single supply operational amplifier,
And it has positive input pin, cathode input pin, the first grounding leg, power input foot and output pin, the high speed photo coupling has first
Empty foot, the second empty foot, input anode foot, input cathode foot, output end power foot, enabled foot, open-drain output foot and second
Grounding leg.Zeroing processing is carried out without point device using single supply operational amplifier, so as to avoid due to environmental factor
The zeroing inaccuracy of appearance can guarantee at its after passing to engine central processing unit so that tach signal is stablized after processing
It is completely correct to manage result.Moreover, the power module that single supply operational amplifier needs is less, manufacturing cost is lower.
Detailed description of the invention
Fig. 1 is the structure principle chart of engine speed indicator signal processing apparatus of the invention.
Specific embodiment
Below in conjunction with attached drawing, present invention is further described in detail.
As shown in Figure 1, engine speed indicator signal processing apparatus of the invention includes operational amplifier 9 and high speed photo coupling
23.The operational amplifier 9 is single supply operational amplifier, and it has positive input pin E, cathode input pin A, the first grounding leg
D, power input foot B and output pin C, the high speed photo coupling 23 have the first empty foot N1, the second empty foot N2, input anode foot V1,
Input cathode foot V2, output end power foot VCC, enabled foot VE, open-drain output foot Vo and the second grounding leg N2.The operation is put
The cathode input pin A of big device 9 is used for and hair after being sequentially connected in series first resistor 7, second resistance 3 and the first transformer 1 by conducting wire
The speed probe of motivation is connected, and the positive input pin E of operational amplifier 9 is sequentially connected in series the 8, the 4th electricity of 3rd resistor by conducting wire
Resistance 6 and second is grounded after transformer 2, from second resistance 3 to first resistor 7 that section lead with from the second transformer 2 to the
First capacitor 4 and diode 5 are parallel between that section lead between four resistance 6 one after another, the first grounding leg D of operational amplifier 9 connects
Ground, the power input foot B of operational amplifier 9 are connected with the first power supply 24, and the power input foot B of operational amplifier 9 passes through second
Capacitor 10 is grounded, and the output pin C of operational amplifier 9 is connected by the 5th resistance 11 with second source 25, operational amplifier 9 it is defeated
It is sequentially connected in series the 6th resistance 12 and the 7th resistance 13 between foot C and positive input pin E out, the output pin C of operational amplifier 9 passes through the
Eight resistance 18 are connected with the input cathode foot V2 of high speed photo coupling 23, the input cathode foot V2 and third capacitor of high speed photo coupling 23
19 be connected after be grounded, the input anode foot V1 of high speed photo coupling 23 is connected by the 9th resistance 17 with third power supply 27, high-speed light
Second grounding leg N2 of coupling 23 is grounded, and the output end power foot VCC of high speed photo coupling 23 is connected with the 4th power supply 26, high speed photo coupling 23
Enabled foot VE be connected with the 4th power supply 26 by the tenth resistance 16, it is electric that the open-drain output foot Vo of high speed photo coupling 23 passes through the 11st
Resistance 15 is connected with the 4th power supply 26, and the 4th power supply 26 is grounded by the 4th capacitor 14, and the open-drain output foot Vo of high speed photo coupling 23 is logical
Conducting wire is crossed to be sequentially connected in series after twelfth resistor 20, the first phase inverter 21 and the second phase inverter 22 for the central processing with engine
Unit is connected, that section lead between the first phase inverter 21 and twelfth resistor 20 is grounded by the 5th capacitor 28.
First phase inverter 21 and the second phase inverter 22 are schmitt inverter.
The resistance that 5th resistance 11 is 1000 ohm, the capacity of second capacitor 10 are 0.1uf.
In use, the cathode input pin A of operational amplifier 9 is sequentially connected in series first resistor 7, second resistance 3 and first becomes
It is connected after depressor 1 with the speed probe of engine, the open-drain output foot Vo of high speed photo coupling 23 is led to and is sequentially connected in series the 12nd electricity
It is connected after the 20, first phase inverter 21 of resistance and the second phase inverter 22 with the central processing unit of engine.To the revolving speed of engine into
When row measurement, firstly, the speed probe of engine incudes the revolving speed of engine, and the tach signal sensed is passed through
Operational amplifier 9 is passed to after crossing the filtering of first capacitor 4 and diode pressure stabilizing.Then, operational amplifier 9 carries out tach signal
Processing, and pass to high speed photo coupling 23.Then, tach signal is isolated in high speed photo coupling 23, to reduce external signal pair
The influence of tach signal.Later, high speed photo coupling 23 switches at high speed treated tach signal by schmitt inverter reduction
When oscillation after, pass to central processing unit.Finally, calculating and adjustment by central processing unit, final measurement is set out
The revolving speed of motivation.
Claims (3)
1. engine speed indicator signal processing apparatus, including operational amplifier (9) and high speed photo coupling (23)；It is characterized in that institute
Stating operational amplifier (9) is single supply operational amplifier, and it has positive input pin (E), cathode input pin (A), the first ground connection
Foot (D), power input foot (B) and output pin (C), the high speed photo coupling (23) have the first empty foot (N1), the second empty foot (N2), defeated
Enter proper pole foot (V1), input cathode foot (V2), output end power foot (VCC), enabled foot (VE), open-drain output foot (Vo) and
Second grounding leg (N2)；The cathode input pin (A) of the operational amplifier (9) is sequentially connected in series first resistor (7), by conducting wire
Afterwards for being connected with the speed probe of engine, the anode of operational amplifier (9) is defeated for two resistance (3) and the first transformer (1)
Enter foot (E) 3rd resistor (8), the 4th resistance (6) and the second transformer (2) are sequentially connected in series by conducting wire and be grounded afterwards, from the second electricity
Hinder (3) between first resistor (7) that section lead with from the second transformer (2) to elder generation between that section lead the 4th resistance (6),
After be parallel with first capacitor (4) and diode (5), the first grounding leg (D) ground connection of operational amplifier (9), operational amplifier (9)
Power input foot (B) be connected with the first power supply (24), the power input foot (B) of operational amplifier (9) passes through the second capacitor
(10) it is grounded, the output pin (C) of operational amplifier (9) is connected by the 5th resistance (11) with second source (25), operation amplifier
The 6th resistance (12) and the 7th resistance (13), operation amplifier are sequentially connected in series between the output pin (C) of device (9) and positive input pin (E)
The output pin (C) of device (9) is connected by the 8th resistance (18) with the input cathode foot (V2) of high speed photo coupling (23), high speed photo coupling
(23) input cathode foot (V2) is grounded after being connected with third capacitor (19), the input anode foot (V1) of high speed photo coupling (23)
It is connected by the 9th resistance (17) with third power supply (27), the second grounding leg (N2) ground connection of high speed photo coupling (23), high speed photo coupling
(23) output end power foot (VCC) is connected with the 4th power supply (26), and the enabled foot (VE) of high speed photo coupling (23) passes through the tenth electricity
Resistance (16) is connected with the 4th power supply (26), and the open-drain output foot (Vo) of high speed photo coupling (23) passes through eleventh resistor (15) and the 4th
Power supply (26) is connected, and the 4th power supply (26) is grounded by the 4th capacitor (14), and the open-drain output foot (Vo) of high speed photo coupling (23) is logical
Cross conducting wire be sequentially connected in series twelfth resistor (20), the first phase inverter (21) and the second phase inverter (22) afterwards for in engine
Central Processing Unit is connected, that section lead between the first phase inverter (21) and twelfth resistor (20) is connect by the 5th capacitor (28)
Ground.
2. engine speed indicator signal processing apparatus as described in claim 1, it is characterised in that first phase inverter
(21) and the second phase inverter (22) is schmitt inverter.
3. engine speed indicator signal processing apparatus as claimed in claim 1 or 2, it is characterised in that the 5th resistance
(11) resistance for being 1000 ohm, the capacity of second capacitor (10) are 0.1uf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710143973.4A CN107064537B (en) | 2017-03-13 | 2017-03-13 | Engine speed indicator signal processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710143973.4A CN107064537B (en) | 2017-03-13 | 2017-03-13 | Engine speed indicator signal processing apparatus |
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| Publication Number | Publication Date |
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| CN107064537A CN107064537A (en) | 2017-08-18 |
| CN107064537B true CN107064537B (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710143973.4A Active CN107064537B (en) | 2017-03-13 | 2017-03-13 | Engine speed indicator signal processing apparatus |
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| CN101177848A (en) * | 2007-10-19 | 2008-05-14 | 西安交通大学 | Direct-driving single needle industrial sewing machine control system |
| CN101214795A (en) * | 2008-01-07 | 2008-07-09 | 清华大学 | Electronic air control shutter automatically controlling device |
| CN102069686A (en) * | 2010-12-14 | 2011-05-25 | 吉林大学 | Automobile tire monitoring device based on organic piezoelectric material |
| CN102263536A (en) * | 2011-07-25 | 2011-11-30 | 李军科 | Stepping motor subdivided driving device for current vector constant amplitude control |
| CN202553925U (en) * | 2012-05-07 | 2012-11-28 | 上海理工大学 | Simple wireless electrocardiogram detecting apparatus |
| CN103326739A (en) * | 2013-05-22 | 2013-09-25 | 南京英埃格传感网络科技有限公司 | Aquaculture wireless sensor network node device and operation method |
| CN206818738U (en) * | 2017-03-13 | 2017-12-29 | 无锡天任电子有限公司 | Engine speed indicator signal processing apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8583100B2 (en) * | 2007-01-25 | 2013-11-12 | Adc Telecommunications, Inc. | Distributed remote base station system |
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2017
- 2017-03-13 CN CN201710143973.4A patent/CN107064537B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1151792A (en) * | 1997-07-31 | 1999-02-26 | Matsushita Electric Works Ltd | Sensor signal circuit |
| CN1557664A (en) * | 2004-01-16 | 2004-12-29 | 湖南科技大学 | Bus type intelligent sensor set for state monitoring |
| CN101177848A (en) * | 2007-10-19 | 2008-05-14 | 西安交通大学 | Direct-driving single needle industrial sewing machine control system |
| CN101214795A (en) * | 2008-01-07 | 2008-07-09 | 清华大学 | Electronic air control shutter automatically controlling device |
| CN102069686A (en) * | 2010-12-14 | 2011-05-25 | 吉林大学 | Automobile tire monitoring device based on organic piezoelectric material |
| CN102263536A (en) * | 2011-07-25 | 2011-11-30 | 李军科 | Stepping motor subdivided driving device for current vector constant amplitude control |
| CN202553925U (en) * | 2012-05-07 | 2012-11-28 | 上海理工大学 | Simple wireless electrocardiogram detecting apparatus |
| CN103326739A (en) * | 2013-05-22 | 2013-09-25 | 南京英埃格传感网络科技有限公司 | Aquaculture wireless sensor network node device and operation method |
| CN206818738U (en) * | 2017-03-13 | 2017-12-29 | 无锡天任电子有限公司 | Engine speed indicator signal processing apparatus |
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