CN106533423A - Pulse interface circuit - Google Patents
Pulse interface circuit Download PDFInfo
- Publication number
- CN106533423A CN106533423A CN201610839804.XA CN201610839804A CN106533423A CN 106533423 A CN106533423 A CN 106533423A CN 201610839804 A CN201610839804 A CN 201610839804A CN 106533423 A CN106533423 A CN 106533423A
- Authority
- CN
- China
- Prior art keywords
- control module
- interface circuit
- resistor
- branch road
- pulse interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000000523 sample Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017509—Interface arrangements
-
- 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
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a pulse interface circuit, including a comparison control module, a measurement branch and a voltage division branch. After the measurement branch and the voltage division branch are connected in parallel, one end is used for connecting with an output signal of a current-type sensor, and the other end is grounded. The measurement branch comprises a first resistor and a switch tube connected with the first resistor in series. The voltage division branch comprises a second resistor and a third resistor connected with the second resistor in series. The output end of the comparison control module is connected to the control end of the switch tube. By driving the switch tube by an operational amplifier, a current signal detected by the sensor is converted into a voltage signal to be measured through a low-power resistor, and the signal detection is realized. The overvoltage protection function is achieved, the interface circuit is prevented from being overheated, and the safety of the interface circuit is ensured.
Description
Technical field
The present invention relates to a kind of pulse interface circuit, belongs to electric and electronic technical field.
Background technology
In prior art, speed probe is generally current type, its signal deteching circuit as shown in figure 1, usually, this turn
The signal of fast sensor output needs series resistance in detection, due to the electric current very little of speed probe output, for avoiding passing
Defeated signal is too little to be flooded by noise, and the resistance of the testing resistance that needs to connect can not be very big, and being finally converted to current signal can
With the voltage signal for measuring.Require in automobile-used detection circuit that circuit can not be damaged in the case of power supply short circuit, this requires
Testing resistance must improve power, and to protect detection circuit, therefore the testing resistance of speed probe must be high-power little resistance
Resistance, but the shortcoming of high-power resistance is that caloric value is high, raises the environment temperature around the high-power resistance, this docking port
Circuit is unfavorable, and high-power resistance is sufficiently bulky, and inconvenience is integrated in the circuit board so that circuit board increases in processing
The difficulty of wiring is added.
The content of the invention
It is an object of the invention to provide a kind of pulse interface circuit, for solving existing interface electric circuit inspection resistor power
Greatly, the high problem of heating.
For solving above-mentioned technical problem, the present invention proposes a kind of pulse interface circuit, props up including control module, measurement is compared
Road, partial pressure branch road, after wherein measuring branch road and partial pressure branch circuit parallel connection, one end is used for connecting the output end of current type sensor, another
End ground connection；Measurement branch road includes the switching tube of first resistor and series connection with it, and the switching tube includes three pins, i.e., one control
End and two connection ends, described first resistor one end are used for connecting the output signal of current type sensor, and other end connection is compared
The comparison input of control module；Partial pressure branch road includes the 3rd resistor of second resistance and series connection with it, wherein second resistance two
Hold for connecting the output signal of current type sensor and comparing the reference input of control module；The control module of comparing
Output end connects the control end of the switching tube.
Further, the partial pressure branch road includes Zener diode, and control module is compared in the positive pole connection of Zener diode
Reference input, the negative pole of Zener diode is used for connecting the output end of current type sensor.
Further, the switching tube is triode or metal-oxide-semiconductor.
Further, the control module that compares includes operational amplifier.
The invention has the beneficial effects as follows：The present invention proposes a kind of pulse interface circuit, and the interface circuit principle is simple, passes through
The current signal that sensor is detected is converted to voltage signal to be measured via small-power resistance by amplifier driving switch pipe, is realized
Signal detection, both with over-voltage protecting function, will not make interface circuit heating too high, it is ensured that the safety of interface circuit again.
Description of the drawings
Fig. 1 is the signal deteching circuit of speed probe；
A kind of schematic diagram of pulse interface circuit of Fig. 2 present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is further described.
A kind of embodiment of the pulse interface circuit of the present invention：
The present invention pulse interface circuit as shown in Fig. 2 include compare control module, measure branch road, partial pressure branch road, wherein
After measurement branch road and partial pressure branch circuit parallel connection, one end is used for connecting the output signal of current type sensor, other end ground connection.Electricity in figure
Streaming sensor is automobile-used speed probe S1, and comparing control module includes operational amplifier U1, and measurement branch road includes first
Resistance R1 and triode Q1, wherein the two series connection, first resistor R1 connect the output end of speed probe S1, triode Q1 emitter-base bandgap gradings
Ground connection, the comparison input of colelctor electrode concatenation operation amplifier U1, base stage connect the output end of the speed probe S1, partial pressure
Branch road includes second resistance R2 and 3rd resistor R3, and wherein second resistance R2 connects the output end of speed probe S1, and the 3rd is electric
Resistance R3 one end ground connection, the reference input of other end concatenation operation amplifier U1.
The signal transmission module also includes Zener diode D1, the positive pole concatenation operation amplifier U1 of Zener diode D1
Reference input, the negative pole of Zener diode D1 connects the output end of speed probe S1.
The present invention provide the pulse interface circuit course of work be：As shown in Fig. 2 speed probe S1 output current pulses
Signal, triode Q1 are cut-off state, and measurement branch road disconnection, described current signal are carried out by resistance R2 and R3 in partial pressure branch road
Partial pressure, is converted to voltage signal, and the concatenation point of the resistance R2 and R3 of partial pressure branch road is connected with operational amplifier U1 reference inputs,
The partial pressure produced in 3rd resistor R3 is the reference voltage signal on operational amplifier U1 reference inputs.On the other hand, by
In measurement branch circuit break, voltage during triode Q1 cut-off states is the voltage letter that operational amplifier U1 compares on input
Number, the voltage signal for now comparing the voltage signal and reference input of input is compared via control module U1 is compared,
When voltage when triode Q1 cut-off states is more than the partial pressure on resistance R3, operational amplifier U1 output high level excites three
Pole pipe base stage, makes triode Q1 conductings in magnifying state.
Triode Q1 measures branch road conducting in magnifying state, makes the intrinsic standoff ratio of triode Q1 and resistance R1 be equal to R3 and R2
On intrinsic standoff ratio, wherein, for adjusting resistance, resistance is larger for R2, R3, and the resistance of resistance R1, R2, R3 is chosen in advance, with full
The output of sufficient sensor S1 requires that the voltage that now need to only measure R1 two ends can just detect the signal of sensor S1 outputs.
If short circuit sensor or the circuit misconnection power supply, what the voltage for being added to Zener diode D1 reached diode punctures bar
Part, makes diode D1 puncture conducting, causes the short-circuit power supply of operational amplifier U1 reference inputs connection, makes input reference voltage
Higher than the comparison input terminal voltage of amplifier U1, it is known that, operational amplifier U1 output low levels make triode Q1 in cut-off shape
State, disconnects measurement branch road, realizes the over-voltage protecting function of interface circuit.
Switching tube described in above example is the situation of triode, and the switching tube can also be metal-oxide-semiconductor.
Comparison control module described in above example is the situation of operational amplifier, and the control module that compares can be with
It is circuit that other have comparing function.
Claims (5)
1. a kind of pulse interface circuit, it is characterised in that include：Relatively control module, measurement branch road, partial pressure branch road, wherein survey
After amount branch road and partial pressure branch circuit parallel connection, one end is used for connecting the output end of current type sensor, other end ground connection；Measurement branch road bag
The switching tube of first resistor and series connection with it is included, the switching tube includes three pins, i.e., one control end and two connection ends, institute
First resistor one end is stated for connecting the output signal of current type sensor, the comparison input of control module is compared in other end connection
End；Partial pressure branch road includes the 3rd resistor of second resistance and series connection with it, and wherein second resistance two ends are used for connecting current type biography
The output signal of sensor and the reference input for comparing control module；The output end for comparing control module connects the switch
The control end of pipe.
2. pulse interface circuit according to claim 1, it is characterised in that the partial pressure branch road includes Zener diode,
The reference input of control module is compared in the positive pole connection of Zener diode, and the negative pole of Zener diode is used for connecting current type biography
The output end of sensor.
3. pulse interface circuit according to claim 1 and 2, it is characterised in that the switching tube is triode or MOS
Pipe.
4. pulse interface circuit according to claim 1 and 2, it is characterised in that the control module that compares includes computing
Amplifier.
5. pulse interface circuit according to claim 3, it is characterised in that the control module that compares includes operation amplifier
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610839804.XA CN106533423B (en) | 2016-09-21 | 2016-09-21 | Pulse interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610839804.XA CN106533423B (en) | 2016-09-21 | 2016-09-21 | Pulse interface circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106533423A true CN106533423A (en) | 2017-03-22 |
| CN106533423B CN106533423B (en) | 2024-04-19 |
Family
ID=58343929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610839804.XA Active CN106533423B (en) | 2016-09-21 | 2016-09-21 | Pulse interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106533423B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603308A (en) * | 1994-11-04 | 1997-02-18 | Nippondenso Co., Ltd. | IGBT driving circuit and ignition device |
| JP2006020441A (en) * | 2004-07-02 | 2006-01-19 | Yasuhiro Sugimoto | Dc/dc converter |
| CN1825761A (en) * | 2005-02-21 | 2006-08-30 | 矢崎总业株式会社 | Overcurrent detecting device |
| JP2006236392A (en) * | 2006-06-01 | 2006-09-07 | Ricoh Co Ltd | Voltage generation system, voltage generation circuit, voltage regulator and portable terminal using them |
| US20100244797A1 (en) * | 2009-03-31 | 2010-09-30 | Katsuyuki Tabata | Current limiting circuit |
| CN202217486U (en) * | 2011-07-20 | 2012-05-09 | 青岛海信电器股份有限公司 | Protection circuit, backlight module and liquid crystal display (LCD) device |
| CN105182138A (en) * | 2015-09-28 | 2015-12-23 | 国网甘肃省电力公司 | Power inductor element inductance and saturation current measurement circuit |
| CN206164501U (en) * | 2016-09-21 | 2017-05-10 | 郑州宇通客车股份有限公司 | Pulse interface circuit |
-
2016
- 2016-09-21 CN CN201610839804.XA patent/CN106533423B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603308A (en) * | 1994-11-04 | 1997-02-18 | Nippondenso Co., Ltd. | IGBT driving circuit and ignition device |
| JP2006020441A (en) * | 2004-07-02 | 2006-01-19 | Yasuhiro Sugimoto | Dc/dc converter |
| CN1825761A (en) * | 2005-02-21 | 2006-08-30 | 矢崎总业株式会社 | Overcurrent detecting device |
| JP2006236392A (en) * | 2006-06-01 | 2006-09-07 | Ricoh Co Ltd | Voltage generation system, voltage generation circuit, voltage regulator and portable terminal using them |
| US20100244797A1 (en) * | 2009-03-31 | 2010-09-30 | Katsuyuki Tabata | Current limiting circuit |
| CN202217486U (en) * | 2011-07-20 | 2012-05-09 | 青岛海信电器股份有限公司 | Protection circuit, backlight module and liquid crystal display (LCD) device |
| CN105182138A (en) * | 2015-09-28 | 2015-12-23 | 国网甘肃省电力公司 | Power inductor element inductance and saturation current measurement circuit |
| CN206164501U (en) * | 2016-09-21 | 2017-05-10 | 郑州宇通客车股份有限公司 | Pulse interface circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106533423B (en) | 2024-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102928726A (en) | Short circuit detection circuit | |
| CN106299180B (en) | The combination of electric tool and battery pack | |
| CN206164501U (en) | Pulse interface circuit | |
| CN202149937U (en) | Electric energy meter calibrating device and calibrating system | |
| CN109932673A (en) | A kind of transformer disconnection detection circuit of breaker | |
| CN104166035A (en) | Negative voltage detection apparatus | |
| CN106533423A (en) | Pulse interface circuit | |
| CN207557390U (en) | MBUS bus short circuit detection circuits | |
| CN101706564A (en) | Cable failure flash detector calibrating device | |
| CN104577961B (en) | Over-pressed power-off protecting circuit | |
| CN102931631B (en) | Output earth leakage protection device for high-voltage and direct-current power supply system | |
| CN205749797U (en) | Audion reverse characteristic tester | |
| CN107884666A (en) | MBUS bus short circuits detect circuit and its detection method | |
| CN206440799U (en) | A kind of circuit checker | |
| CN204719122U (en) | A kind of voltage detecting warning circuit | |
| CN104181370A (en) | Load current detection circuit and detection device | |
| CN210742306U (en) | Short-circuit prevention makeup testing device | |
| CN103743942A (en) | Detection method for initiating explosive device leakage current of power distribution module with solid relay | |
| CN106602512A (en) | Overheating protection circuit based on p-n junction forward voltage drop temperature characteristic | |
| CN208537614U (en) | Current detection means | |
| CN203130575U (en) | Alternating-current fan fault detecting circuit | |
| CN208548756U (en) | Induction-type high-voltage charges indicators for switching condition | |
| CN207588428U (en) | A kind of power-off automatic protection circuit | |
| CN106026054A (en) | Digital output self-inspection circuit | |
| CN201945622U (en) | Current detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |