CN203606379U - A vehicle speed sensor test and control system - Google Patents
A vehicle speed sensor test and control system Download PDFInfo
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- CN203606379U CN203606379U CN201320676203.3U CN201320676203U CN203606379U CN 203606379 U CN203606379 U CN 203606379U CN 201320676203 U CN201320676203 U CN 201320676203U CN 203606379 U CN203606379 U CN 203606379U
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- vehicle speed
- speed sensor
- slave computer
- motor
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Abstract
The utility model provides a vehicle speed sensor test and control system comprising a vehicle speed working condition simulation unit, a Hall vehicle speed sensor, a slave computer unit and a principal personal computer human-computer interface unit. The vehicle speed working condition simulation unit comprises a vehicle speed motor connected with the Hall vehicle speed sensor. The slave computer unit comprises a slave computer DSP system board and a vehicle speed sensor conditioning circuit. The vehicle speed sensor conditioning circuit is formed by connecting resistors R51-R54, a diode D5, capacitors C51-C52, an inverting amplifier U3 and a switch optocoupler U5, wherein the R51 and the C51 form an RC low-pass filtering circuit for filtering noise wave jamming, the reversely series-connected diode D5 is used for filtering jamming caused by peak glitches, the inverting amplifier U3 overcomes noise and hump jamming phenomena, and the switch optocoupler U5 is used for optoelectronic isolation. The vehicle speed sensor test and control system is simple and reasonable in structural design. The vehicle speed sensor conditioning circuit is high in antijamming capability and vehicle speed sensor signals are steep without noise wave after shaping, so that the measurement of the slave computer unit is accurate and reliable.
Description
Technical field
The utility model relates to vehicle speed sensor technical field, relates in particular to a kind of TT&C system of vehicle speed sensor.
Background technology
Sensor laboratory table in the market can not meet the practical teaching requirement of sensing vehicle technical elements targetedly.For example " Hall-type vehicle speed sensor " experiment, can only be simply fixing sensor rear external power supply, after manual rotation input shaft, the form of observation output pulse is carried out recognizing sensor characteristic, understanding that cannot be more deep and application, and test process is very inconvenient, be not easy to scale, repetition experiment; Speed information dependence test exists and tests directly perceived not and demarcation inconvenience, accurate not with demarcation simultaneously.Although existing document has proposed the development plan of Hall-type vehicle speed sensor test macro, because it is the project of the supporting development of motor corporation, bias toward test performance quality, have certain limitation as practical teaching, inconvenience is as test and control the platform of developing.Especially,, in prior art, if environmental interference is little, generally Hall element signal is directly taken and without modulate circuit; If there is interference, the modulate circuit of taking is generally independent filtering circuit or general zero-crossing comparator circuit, these modes all cause shaping effect good not, poor anti jamming capability, vehicle speed sensor signal is subject to clutter impact, not only have a strong impact on science, the accuracy of speed information dependence test and demarcation, nor be beneficial to the research and development of speed information test, control platform.
Above-mentioned known, be necessary prior art further to improve.
Summary of the invention
The utility model be for solve existing based on car speed sensor carry out speed information dependence test and demarcate in a little less than poor, the antijamming capability of the shaping effect of vehicle speed sensor modulate circuit, sensor signal is subject to the problems such as clutter impact and proposes a kind of structural design simply, rationally, vehicle speed sensor modulate circuit antijamming capability is strong, the TT&C system of the vehicle speed sensor that sensor signal shaping effect is good.
The utility model is achieved through the following technical solutions:
The TT&C system of above-mentioned vehicle speed sensor, the upper PC human and machine interface unit that comprises slave computer unit and be connected with described slave computer unit; Described TT&C system includes speed of a motor vehicle Work condition analogue unit and Hall-type vehicle speed sensor; Described speed of a motor vehicle Work condition analogue unit comprises speed of a motor vehicle motor; Described Hall-type vehicle speed sensor connects the speed of a motor vehicle motor of described speed of a motor vehicle Work condition analogue unit; Described slave computer unit comprises slave computer dsp system plate and vehicle speed sensor modulate circuit; Described vehicle speed sensor modulate circuit is connected to form by resistance R 51 ~ R54, diode D5, capacitor C 51 ~ C52, polarity-inverting amplifier U3 and switch optocoupler U5; One end of described resistance R 51 connects the input end of polarity-inverting amplifier U3 by diode D5, the other end is connected with terminal B5; Described resistance R 51 connects the cathode terminal of described diode D5, and the anode tap of described diode D5 connects the input end of described polarity-inverting amplifier U3; Described resistance R 52 one end connection+5V power supplys, the other end is connected in the tie point of described diode D5 anode tap and polarity-inverting amplifier U3 input end; Described capacitor C 51 one end ground connection, the other end is connected in the tie point of described resistance R 51 and diode D5 cathode terminal; The input end grounding of described polarity-inverting amplifier U3, output terminal connects the anode of described switch optocoupler U5 by described resistance R 53; The plus earth of described switch optocoupler U5, collector connects power supply, emitter by described resistance R 54 ground connection and the one end that is also connected described capacitor C 52 with described slave computer dsp system plate connect the emitter of described switch optocoupler U5, other end ground connection.
The TT&C system of described vehicle speed sensor, wherein: described resistance R 51 is by the described terminal B5 of input terminal CS-IN coupling grafting.
The TT&C system of described vehicle speed sensor, wherein: described slave computer dsp system plate has the output pin PWM3 of signal capture port CAP5 and PWM waveform; The emitter of described switch optocoupler U5 is to be connected with described signal capture port CAP5 by described resistance R 54.
The TT&C system of described vehicle speed sensor, wherein: described TT&C system also comprises automobile speed instrument pack; Described automobile speed instrument pack connects described Hall-type vehicle speed sensor, simultaneously by slave computer dsp system plate described in described vehicle speed sensor modulate circuit feedback link.
The TT&C system of described vehicle speed sensor, wherein: described slave computer unit also comprises speed of a motor vehicle motor-drive circuit; One end two-way communication of described slave computer dsp system plate connects described upper PC human and machine interface unit, speed of a motor vehicle motor-drive circuit connect driving described speed of a motor vehicle Work condition analogue unit by described speed of a motor vehicle motor-drive circuit described in other end control linkage.
The TT&C system of described vehicle speed sensor, wherein: described automobile speed instrument pack is by connect+24V of terminal B13 power supply, simultaneously by terminal B1 ground connection; Described Hall-type vehicle speed sensor connects operating voltage by terminal B17, connects described automobile speed instrument pack by terminal B16 simultaneously.
The TT&C system of described vehicle speed sensor, wherein: between described automobile speed instrument pack and described vehicle speed sensor modulate circuit, be also provided with measurement port; Described measurement port is also connected with oscillograph.
The TT&C system of described vehicle speed sensor, wherein: described speed of a motor vehicle motor is exported corresponding PWM drive waveform by described slave computer dsp system plate in real time by described output pin PWM3; Described speed of a motor vehicle motor adopts DC micro-motor.
Beneficial effect:
The TT&C system structural design of the utility model vehicle speed sensor is simple, reasonable, and simple, convenient, cost is low, and man-machine interface close friend tests directly perceived and demarcates accurately; Especially, vehicle speed sensor modulate circuit anti-electromagnetic interference capability is strong, and vehicle speed sensor signal is precipitous and without clutter after shaping, strengthen shaping effect, made the measurement of slave computer unit accurately and reliably, wherein, the RC low-pass filter circuit that adopts R51, C51 to form, effectively filtering clutter disturbs; While mainly appearing at high level input due to spike burr, adopt the diode D5 playing a reversed role just conducting in the time that input signal is low level, the interference that when the further filtering high level input of energy, spike burr causes; Employing is polarity-inverting amplifier U3 with the hysteresis comparator schmitt inverter of positive feedback, can further overcome noise and hump interference phenomenon; Adopt switch optocoupler U5 to carry out photoelectricity isolation, avoid sensor and digitally between crosstalk.
Moreover speed of a motor vehicle motor-drive circuit is strengthened job stability by optimization drive circuit works effect, exact matching circuit parameter; Adopt the features such as the vehicle speed sensor of Hall-type has, stable output signal high to Magnetic susceptibility, frequency response is high, anti-electromagnetic interference capability is strong, simple in structure, easy to use, low speed is respond well, falls pulse phenomenon while not there is not low speed; Meanwhile, vehicle speed sensor signal measurement accurately and reliably, is simulated speed of a motor vehicle operating conditions quick and stable; Modular design flexibly and plug connect, and can facilitate practical application, can not only meet relevant practical teaching, are also the Practice Platforms of good graduation project and Electronic Design application extracurriliar.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the TT&C system of the utility model vehicle speed sensor;
Fig. 2 is the control circuit structural drawing of the TT&C system of the utility model vehicle speed sensor;
Fig. 3 is the electrical schematic diagram of the automobile speed instrument of the TT&C system of the utility model vehicle speed sensor.
Embodiment
As shown in Figures 1 to 3, the TT&C system of the utility model vehicle speed sensor, be the TT&C system based on Hall-type vehicle speed sensor, comprise speed of a motor vehicle Work condition analogue unit 1, Hall-type vehicle speed sensor 2, automobile speed instrument pack 3, slave computer unit 4 and upper PC human and machine interface unit 5.Wherein, this slave computer unit 4 comprises slave computer dsp system plate 41, vehicle speed sensor modulate circuit 42 and speed of a motor vehicle motor-drive circuit 43.
This 1 one end, speed of a motor vehicle Work condition analogue unit connects Hall-type vehicle speed sensor 2, and the other end is connected with slave computer dsp system plate 41 by speed of a motor vehicle motor-drive circuit 43; Wherein, this speed of a motor vehicle Work condition analogue unit 1 comprises speed of a motor vehicle motor 11, and this speed of a motor vehicle motor adopts DC micro-motor and connects by shaft coupling and Hall-type vehicle speed sensor 2.
These Hall-type vehicle speed sensor 2 one end connect automobile speed instrument pack 3, and its automobile instrument panel that vehicle speed signal is sent to automobile speed instrument pack 3 shows.
This automobile speed instrument pack 3 connects slave computer dsp system plate 41 by vehicle speed sensor modulate circuit 42, the vehicle speed signal being transmitted by Hall-type vehicle speed sensor 2 is sent to slave computer dsp system plate 41 through automobile speed instrument pack 3 by vehicle speed sensor modulate circuit 42 and is measured in real time, and carries out FEEDBACK CONTROL with setting after the speed of a motor vehicle.Wherein, between automobile speed instrument pack 3 and vehicle speed sensor modulate circuit 42, be also provided with measurement port, this measurement port is also connected with oscillograph 6, by can measure in real time current actual waveform and the shaping waveform of Hall-type vehicle speed sensor 2 with oscillograph 6.
One end of this slave computer dsp system plate 41 is carried out two-way communication by serial ports and is connected upper PC man-machine interface 5, and the other end connects regulation speed motor-drive circuit 43 and driven and connected speed of a motor vehicle Work condition analogue unit 1 by speed of a motor vehicle motor-drive circuit 43.This slave computer dsp system plate 41 has the output pin PWM3 of signal capture port CAP5 and PWM waveform.
This vehicle speed sensor modulate circuit 42 is connected to form by resistance R 51 ~ R54, diode D5, capacitor C 51 ~ C52, polarity-inverting amplifier U3 and switch optocoupler U5; Wherein, one end of resistance R 51 is plugged with terminal B5 by input terminal CS-IN coupling, and the other end connects the input end of polarity-inverting amplifier U3 by diode D5; Wherein, the cathode terminal contact resistance R51 of diode D5, anode tap is the input end that connects polarity-inverting amplifier U3; Resistance R 52 one end are connected in the tie point of diode D5 anode tap and polarity-inverting amplifier U3 input end, be connected in+5V of the other end of resistance 52 power supply; Capacitor C 51 one end ground connection (in analog), the other end is connected in the tie point of resistance R 51 and diode D5 cathode terminal, and capacitor C 51 forms RC filtering circuit together with resistance R 51; The input end grounding (in analog) of polarity-inverting amplifier U3, output terminal is by the anode of resistance R 53 connecting valve optocoupler U5; The plus earth (in analog) of switch optocoupler U5, collector connection+3.3V power supply, emitter passes through resistance R 54 ground connection (digitally) and also catches port with the CAP5 of slave computer unit 4 to be connected; The emitter of one end connecting valve optocoupler U5 of capacitor C 52, other end ground connection (digitally).
Because vehicle speed sensor modulate circuit 42 is subject to speed of a motor vehicle motor 11 brushes and other is as the impact of the factors such as magnetoelectric tachometric transducer space electromagnetic interference (EMI), so be not the square-wave signal of standard from automobile speed instrument pack 3 through the signal of terminal B5 output, but be mingled with a large amount of spikes and burr, so need further processing just can be sent to the signal capture port CAP5 of slave computer dsp system plate 41.First output pulse signal carries out filtering, filtering high-frequency interferencing signal through the RC filtering circuit being made up of resistance R 51 and capacitor C 51.Then through a diode D5 pull-up circuit of playing a reversed role, diode D5 conducting output low level signal when input terminal CS-IN is low level, diode D5 cut-off output high level signal when input end is high level.While mainly appearing at high level input due to spike burr, therefore the interference that further filtering spike burr causes.For making output waveform more precipitous, output signal again process is polarity-inverting amplifier U3 with the hysteresis comparator schmitt inverter of positive feedback, and can further overcome noise and hump interference phenomenon.And then after switch optocoupler carries out photoelectricity isolation, be sent to the signal capture port CAP5 of slave computer dsp system plate 41, avoid sensor and digitally between crosstalk.
In the present embodiment, this speed of a motor vehicle motor-drive circuit 43 is connected to form by resistance R 91 ~ R94, a pair of polarity-inverting amplifier U4, switch optocoupler U9, field effect transistor Q9, diode D9 and polar capacitor C91; Wherein, these resistance R 91 one end ground connection (digitally), the other end is connected in the output pin PWM3 of slave computer dsp system plate 41; This pair of polarity-inverting amplifier U4 is serially connected, be the input end of one of them polarity-inverting amplifier U4 connects slave computer dsp system plate 6 output pin PWM3 by resistance R 92, output terminal is connected in the input end of another polarity-inverting amplifier U4, and the output terminal of another polarity-inverting amplifier U4 is connected in the anode of switch optocoupler U9 by resistance R 93; The plus earth (digitally) of switch optocoupler U9, emitter is connected in the grid of field effect transistor Q9, collector by the coupling plug of lead-out terminal CS-OUT ﹢ terminal be connected in speed of a motor vehicle motor 11 one end and with another+5V power supply is connected; The drain electrode of field effect transistor Q9 is connected in speed of a motor vehicle motor 11 other ends by another lead-out terminal CS-OUT ﹣, and source ground (in analog) also connects the grid of field effect transistor Q9 by resistance R 94; Diode D9 is silicon diode, and it is connected between the collector of switch optocoupler U9 and the drain electrode of field effect transistor Q9, and the anode tap of diode D9 connects the drain electrode of field effect transistor Q9, the collector of the cathode terminal connecting valve optocoupler U9 of diode D9; Polar capacitor C91 is parallel to the two ends of speed of a motor vehicle motor 11, and the positive pole of polar capacitor C91 is connected with the cathode terminal of diode D9, and the negative pole of polar capacitor C91 is connected with the anode tap of diode D9.
When the real-time measurement speed of a motor vehicle and set the speed of a motor vehicle relatively after, slave computer unit 4 by after software control algorithm through output pin PWM3 in real time the corresponding PWM waveform of output to drive speed of a motor vehicle motor 11.PWM waveform is after polarity-inverting amplifier U4 drives, to be sent to switch optocoupler U9 to carry out after isolation drive through two-stage phase inverter, removes to control the grid of IRF540N type field effect transistor Q9, makes loading vehicle speed motor 11 and the path on ground carry out break-make control.Anti-diode D9 also plays the effect of fly-wheel diode, and the induced potential energy generating after speed of a motor vehicle motor 11 slows down suddenly discharges by diode D9, avoids puncturing field effect transistor Q9.Speed of a motor vehicle motor 11 two ends polar capacitor C91 in parallel, smoothly PWM waveform, moves speed of a motor vehicle motor 11 more steady.
Wherein, as shown in Figure 2,3, automobile speed instrument pack 3 is by connect+24V of terminal B13 power supply, simultaneously also by terminal B1 ground connection (in analog).Hall-type vehicle speed sensor 2 connects operating voltage (+8.6V) by terminal B17, also by terminal B16, vehicle speed sensor signal input automobile speed instrument pack 3 inside is shown simultaneously, and exports through terminal B5.Therefore can directly utilize terminal B5, the speed of a motor vehicle square-wave signal that automobile speed instrument pack 3 is exported is directly sent to rear class vehicle speed sensor modulate circuit 42 and slave computer dsp system plate 41 as vehicle speed signal source.
After the vehicle speed measurement data that upper PC human and machine interface unit 5 is accepted to transmit slave computer unit 4, synchronously show, the speed of a motor vehicle that while setting operation person is desired also sends to slave computer unit 4.
The utility model structural design is simple, rationally, especially vehicle speed sensor modulate circuit anti-electromagnetic interference capability is strong, vehicle speed sensor signal is precipitous and without clutter, strengthened shaping effect after shaping, makes the measurement of slave computer unit accurately and reliably; Meanwhile, modular design flexibly and plug connect, and can facilitate practical application, can not only meet relevant practical teaching, are also the Practice Platforms of good graduation project and Electronic Design application extracurriliar.
Claims (8)
1. a TT&C system for vehicle speed sensor, the upper PC human and machine interface unit that comprises slave computer unit and be connected with described slave computer unit; It is characterized in that: described TT&C system includes speed of a motor vehicle Work condition analogue unit and Hall-type vehicle speed sensor; Described speed of a motor vehicle Work condition analogue unit comprises speed of a motor vehicle motor; Described Hall-type vehicle speed sensor connects the speed of a motor vehicle motor of described speed of a motor vehicle Work condition analogue unit;
Described slave computer unit comprises slave computer dsp system plate and vehicle speed sensor modulate circuit;
Described vehicle speed sensor modulate circuit is connected to form by resistance R 51 ~ R54, diode D5, capacitor C 51 ~ C52, polarity-inverting amplifier U3 and switch optocoupler U5;
One end of described resistance R 51 connects the input end of polarity-inverting amplifier U3 by diode D5, the other end is connected with terminal B5; Described resistance R 51 connects the cathode terminal of described diode D5, and the anode tap of described diode D5 connects the input end of described polarity-inverting amplifier U3; Described resistance R 52 one end connection+5V power supplys, the other end is connected in the tie point of described diode D5 anode tap and polarity-inverting amplifier U3 input end; Described capacitor C 51 one end ground connection, the other end is connected in the tie point of described resistance R 51 and diode D5 cathode terminal; The input end grounding of described polarity-inverting amplifier U3, output terminal connects the anode of described switch optocoupler U5 by described resistance R 53; The plus earth of described switch optocoupler U5, collector connects power supply, emitter by described resistance R 54 ground connection and the one end that is also connected described capacitor C 52 with described slave computer dsp system plate connect the emitter of described switch optocoupler U5, other end ground connection.
2. the TT&C system of vehicle speed sensor as claimed in claim 1, is characterized in that: described resistance R 51 is by the described terminal B5 of input terminal CS-IN coupling grafting.
3. the TT&C system of vehicle speed sensor as claimed in claim 1, is characterized in that: described slave computer dsp system plate has the output pin PWM3 of signal capture port CAP5 and PWM waveform
The emitter of described switch optocoupler U5 is to be connected with described signal capture port CAP5 by described resistance R 54.
4. the TT&C system of vehicle speed sensor as claimed in claim 3, is characterized in that: described TT&C system also comprises automobile speed instrument pack;
Described automobile speed instrument pack connects described Hall-type vehicle speed sensor, simultaneously by slave computer dsp system plate described in described vehicle speed sensor modulate circuit feedback link.
5. the TT&C system of vehicle speed sensor as claimed in claim 1, is characterized in that: described slave computer unit also comprises speed of a motor vehicle motor-drive circuit; One end two-way communication of described slave computer dsp system plate connects described upper PC human and machine interface unit, speed of a motor vehicle motor-drive circuit connect driving described speed of a motor vehicle Work condition analogue unit by described speed of a motor vehicle motor-drive circuit described in other end control linkage.
6. the TT&C system of vehicle speed sensor as claimed in claim 4, is characterized in that:
Described automobile speed instrument pack is by connect+24V of terminal B13 power supply, simultaneously by terminal B1 ground connection;
Described Hall-type vehicle speed sensor connects operating voltage by terminal B17, connects described automobile speed instrument pack by terminal B16 simultaneously.
7. the TT&C system of vehicle speed sensor as claimed in claim 4, is characterized in that: between described automobile speed instrument pack and described vehicle speed sensor modulate circuit, be also provided with measurement port; Described measurement port is also connected with oscillograph.
8. the TT&C system of vehicle speed sensor as claimed in claim 3, is characterized in that: described speed of a motor vehicle motor is exported corresponding PWM drive waveform by described slave computer dsp system plate in real time by described output pin PWM3; Described speed of a motor vehicle motor adopts DC micro-motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320676203.3U CN203606379U (en) | 2013-10-30 | 2013-10-30 | A vehicle speed sensor test and control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320676203.3U CN203606379U (en) | 2013-10-30 | 2013-10-30 | A vehicle speed sensor test and control system |
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| CN203606379U true CN203606379U (en) | 2014-05-21 |
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| CN201320676203.3U Expired - Fee Related CN203606379U (en) | 2013-10-30 | 2013-10-30 | A vehicle speed sensor test and control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569473A (en) * | 2014-12-19 | 2015-04-29 | 广西南宁市精祥仪表有限责任公司 | Method for measuring rotation speed of industrial diesel engine |
| CN104590209A (en) * | 2014-12-19 | 2015-05-06 | 湖南科技大学 | Car anti-theft alarming device |
| CN107068171A (en) * | 2017-03-24 | 2017-08-18 | 成都云材智慧数据科技有限公司 | A kind of electromagnetism interference type data storage system |
| CN109194205A (en) * | 2018-07-25 | 2019-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of HALL input signal conditioning circuit |
-
2013
- 2013-10-30 CN CN201320676203.3U patent/CN203606379U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569473A (en) * | 2014-12-19 | 2015-04-29 | 广西南宁市精祥仪表有限责任公司 | Method for measuring rotation speed of industrial diesel engine |
| CN104590209A (en) * | 2014-12-19 | 2015-05-06 | 湖南科技大学 | Car anti-theft alarming device |
| CN107068171A (en) * | 2017-03-24 | 2017-08-18 | 成都云材智慧数据科技有限公司 | A kind of electromagnetism interference type data storage system |
| CN109194205A (en) * | 2018-07-25 | 2019-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of HALL input signal conditioning circuit |
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Granted publication date: 20140521 Termination date: 20161030 |