CN207081990U - Wheel speed sensors signal imitation device - Google Patents
Wheel speed sensors signal imitation device Download PDFInfo
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- CN207081990U CN207081990U CN201720907472.4U CN201720907472U CN207081990U CN 207081990 U CN207081990 U CN 207081990U CN 201720907472 U CN201720907472 U CN 201720907472U CN 207081990 U CN207081990 U CN 207081990U
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- signal
- wheel speed
- latch
- speed sensors
- control chip
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 abstract description 2
- 230000002463 transducing effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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Abstract
The utility model discloses a kind of wheel speed sensors signal imitation device, including turn knob potentiometer, modulus conversion chip, signal generating circuit, latch, with the one-to-one LED charactrons of latch and circuit output current square-wave signal occurs based on digital voltage signal control signal and controls latch and LED charactrons to show the main control chip of current square-wave signal frequency；Turn knob potentiometer electrically connects with modulus conversion chip, modulus conversion chip electrically connects with main control chip, main control chip and signal generating circuit are electrically connected, electrically connected by latch with corresponding LED charactrons, the input source of the output end of signal generating circuit as auto parts and components bench test.Accurate wheel speed transducing signal modeling scheme is provided for vehicle bench test, while hardware cost is saved, has saved the time built needed for stand so that the simulation of wheel speed signal becomes easy；Supported without PC host computers, small volume is simple in construction.
Description
Technical field
Auto parts and components engine bench test technical field is the utility model is related to, more particularly to a kind of wheel speed sensors signal
Analogue means.
Background technology
Wheel speed sensors signal is the essential input source of auto parts and components bench test, the production of wheel speed sensors signal
It is raw to need wheel speed sensors body to produce relative motion with target wheel.
At present, substantially there is two ways for wheel speed sensors signal imitation in vehicle or parts testboard bay：
First way：Build dynamic environment, using transmission system drive target wheel, so as to fixed wheel speed sensors
Produce relative rotation, the operating mode that simulating wheel rotates, wheel speed sensors is produced signal output.Program environmental structure is extremely numerous
It is trivial, it is necessary to transmission system, stationary fixture and peripheral component etc., time-consuming for overall plan design, hardware consumables cost is high.
The second way：Directly simulated by PC in test software, skip physical layer Acquisition Circuit, wheel speed signal with
Variable format is exported to upper layer software (applications).PC host computers need to be relied on using the program, be not suitable for using outside the venue, and different controls
The software of module must customize the modeling scheme of wheel speed signal again, can not directly continue to use, poor for applicability.
Utility model content
The utility model is directed to problem and shortage existing for prior art, there is provided a kind of new wheel speed sensors signal mode
Intend device.
The utility model is that solve above-mentioned technical problem by following technical proposals：
The utility model provides a kind of wheel speed sensors signal imitation device, and its feature is, it include one for for
Family sets the turn knob potentiometer of varying voltage signal, one to be used to the analog voltage signal of reception being converted to digital voltage signal
Modulus conversion chip, a signal generating circuit, multiple latch and the one-to-one LED charactrons of those latch, Yi Jiyi
For controlling the signal generating circuit to export a current square-wave signal based on the digital voltage signal and controlling the latch and be somebody's turn to do
LED charactrons show the main control chip of the frequency of the current square-wave signal；
The turn knob potentiometer electrically connects with the modulus conversion chip, and the modulus conversion chip electrically connects with the main control chip,
The main control chip is electrically connected with the signal generating circuit, also electrically connected by the latch with corresponding LED charactrons, the signal
Input source of the output end of circuit as auto parts and components bench test occurs.
It is preferred that the signal generating circuit includes a LM317 chips, a first resistor, an analog switch and one second electricity
Resistance；
The main control chip electrically connects with the control source pin of the LM317 chips, and the voltage output pin of the LM317 chips passes through
The first resistor and the analog switch electrically connect with the output end of the signal generating circuit, also by the second resistance and the signal
The output end electrical connection of circuit occurs, the voltage-regulation pin of the LM317 chips electrically connects with the output end of the signal generating circuit,
The main control chip electrically connects with the analog switch.
It is preferred that the analog switch uses CD4052.
It is preferred that the main control chip uses 51 AT89S52 single board computers.
It is preferred that the modulus conversion chip uses AD0804.
It is preferred that the wheel speed sensors signal imitation device includes 4 latch and 4 LED charactrons, the main control chip
Electrically connected respectively with the Enable Pin of those latch.
It is preferred that the latch uses 74HC573.
On the basis of common sense in the field is met, above-mentioned each optimum condition, can be combined, produce the utility model respectively compared with
Good example.
Positive effect of the present utility model is：
1st, signal imitation device provides accurate wheel speed transducing signal modeling scheme for vehicle bench test, hard saving
While part cost, the time built originally needed for stand is also saved so that the simulation of wheel speed signal becomes easy.
2nd, support that small volume is simple in construction, is convenient for carrying without PC host computers.
3rd, signal output frequency is visual, adjustable.
Brief description of the drawings
Fig. 1 is the structured flowchart of the wheel speed sensors signal imitation device of the utility model preferred embodiment.
Fig. 2 is the circuit theory diagrams of the signal generating circuit of the utility model preferred embodiment.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all belongs to
In the scope of the utility model protection.
As illustrated in fig. 1 and 2, the present embodiment provides a kind of wheel speed sensors signal imitation device, it include one for for
Family sets the turn knob potentiometer 1, one of varying voltage signal to be used to the analog voltage signal of reception being converted to digital voltage signal
Modulus conversion chip 2,3,4 latch 4 of a signal generating circuit, with the one-to-one LED charactrons 5 of those latch 4,
And one be used to control the signal generating circuit 3 one current square-wave signal of output based on the digital voltage signal and control the latch
Device 4 and the LED charactrons 5 show the main control chip 6 of the frequency of the current square-wave signal.
Wherein, the modulus conversion chip 2 uses AD0804, and the latch 4 uses 74HC573, and the main control chip 6 uses 51
AT89S52 single board computer.
The turn knob potentiometer 1 electrically connects with the modulus conversion chip 2, and the modulus conversion chip 2 is electrically connected with the main control chip 6
Connect, the main control chip 6 electrically connects with the signal generating circuit 3, is also electrically connected by the latch 4 with corresponding LED charactrons 5
Connect, the input source of the output end of the signal generating circuit 3 as auto parts and components bench test.
Moreover, as shown in Fig. 2 the signal generating circuit 3 includes a LM317 chips, a first resistor R1, an analog switch
A S and second resistance R2, analog switch S use CD4052.
The main control chip 6 electrically connects with the control source pin IN of the LM317 chips, the voltage output pin of the LM317 chips
OUT electrically connected by first resistor R1 and analog switch S with the output end of the signal generating circuit 3, also by this second
Resistance R2 electrically connects with the output end of the signal generating circuit 3, and voltage-regulation pin ADJ and the signal of the LM317 chips occur
The output end electrical connection of circuit 3, the main control chip 6 electrically connect with analog switch S.
At present, the wheel speed sensors of passenger car select Hall-type chip more, and it exports 7mA low levels, 14mA high level
Current square-wave signal.Wheel speed sensors signal simulator, which must export high-precision constant current, can just meet above-mentioned Hall-type wheel
The physical features of fast sensor signal.It is 1.25V using the adjustable side and output end voltage perseverance of LM317 chips in the present embodiment
Physical characteristic, by main control chip 6 gate analog switch S, to match different resistance, signal generating circuit 3 is exported
Meet desired current signal.
Wheel speed sensors output signal frequency scope is 0-3000Hz, and the frequency requirement of resistors match is high, therefore, this implementation
Resistors match is realized using CD4052 analog switches in example, it is opened sluggish 600ns, closes sluggish 210ns, disclosure satisfy that signal
Frequency requirement.
Wheel speed sensors signal imitation device requires that output signal can adjust, and the knot of turn knob potentiometer 1 is used in the present embodiment
Input of the modulus conversion chip 2 as main control chip 6 is closed, thus can realize the output that circuit 3 occurs by knob Regulate signal.
Using 51 AT89S52 single board computers as main control chip, the P1.0-P1.7 data ports of main control chip 6 in the present embodiment
Modulus conversion chip AD0804 P11-P18 mouths are respectively electrically connected to, realize the collection of the magnitude of voltage of turn knob potentiometer 1.
To realize visualization that analog signal output enters, 4 real-time displays of LED charactrons 5 electricity are employed in the present embodiment
Flow the rate-adaptive pacemaker value of square-wave signal.The driving of charactron can be divided into static state display and Dynamic Announce, because this programme needs to realize
Accurate rate-adaptive pacemaker, thus static state display is used, 4 74HC573 latch 4 are selected, the Q0-Q7 of latch 4 joins respectively
It is connected to the a-h ends of LED charactrons 5.P2.1-the P2.4 of main control chip 6 are respectively coupled to the Enable Pin of 4 latch 4, so as to real
The static state display of existing output frequency.
The core of wheel speed sensors signal imitation device is the generation of current signal, and the present embodiment utilizes LM317
Adjustable side and the permanent physical characteristic for 1.25V of output voltage, with reference to active wheel speed sensor 7mA low levels, 14mA high level
Demand signals, the first resistor R1 in Fig. 2 and second resistance R2 are matched to the resistance of about 180 ohm and 90 ohm respectively；Will
CD4052 analog switches are used for resistors match, and pin P6, P9, P10 of CD4052 analog switches are respectively electrically connected to main control chip 6
P2.5, P2.6, P2.7 data port, to control the break-make of analog switch.CD4052 is a double-pole four throw switch, the present apparatus
It only have chosen P13 and P12 access circuits and realize resistors match as switch.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
Member can make numerous variations or repair to these embodiments on the premise of without departing substantially from principle of the present utility model and essence
Change, but these changes and modification each fall within the scope of protection of the utility model.
Claims (7)
1. a kind of wheel speed sensors signal imitation device, it is characterised in that it includes one and is used to set different voltage letters for user
Number turn knob potentiometer, one be used for by the analog voltage signal of reception be converted to digital voltage signal modulus conversion chip, one
Signal generating circuit, multiple latch and the one-to-one LED charactrons of those latch and one are for being based on the numeral
Voltage signal controls the signal generating circuit to export a current square-wave signal and controls the latch and the LED charactrons to show this
The main control chip of the frequency of current square-wave signal；
The turn knob potentiometer electrically connects with the modulus conversion chip, and the modulus conversion chip electrically connects with the main control chip, the master
Control chip is electrically connected with the signal generating circuit, also electrically connected by the latch with corresponding LED charactrons, and the signal occurs
Input source of the output end of circuit as auto parts and components bench test.
2. wheel speed sensors signal imitation device as claimed in claim 1, it is characterised in that the signal generating circuit includes one
LM317 chips, a first resistor, an analog switch and a second resistance；
The main control chip electrically connects with the control source pin of the LM317 chips, the voltage output pin of the LM317 chips by this
One resistance and the analog switch are electrically connected with the output end of the signal generating circuit, also occurred by the second resistance and the signal
The output end electrical connection of circuit, the voltage-regulation pin of the LM317 chips electrically connect with the output end of the signal generating circuit, the master
Control chip electrically connects with the analog switch.
3. wheel speed sensors signal imitation device as claimed in claim 2, it is characterised in that the analog switch uses
CD4052。
4. wheel speed sensors signal imitation device as claimed in claim 1, it is characterised in that the main control chip uses 51 monolithics
Machine AT89S52.
5. wheel speed sensors signal imitation device as claimed in claim 1, it is characterised in that the modulus conversion chip uses
AD0804。
6. wheel speed sensors signal imitation device as claimed in claim 1, it is characterised in that the wheel speed sensors signal imitation
Device includes 4 latch and 4 LED charactrons, the main control chip electrically connect with the Enable Pin of those latch respectively.
7. wheel speed sensors signal imitation device as claimed in claim 6, it is characterised in that the latch uses 74HC573.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907472.4U CN207081990U (en) | 2017-07-25 | 2017-07-25 | Wheel speed sensors signal imitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907472.4U CN207081990U (en) | 2017-07-25 | 2017-07-25 | Wheel speed sensors signal imitation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207081990U true CN207081990U (en) | 2018-03-09 |
Family
ID=61424103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720907472.4U Expired - Fee Related CN207081990U (en) | 2017-07-25 | 2017-07-25 | Wheel speed sensors signal imitation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207081990U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963073A (en) * | 2019-12-24 | 2020-04-07 | 中航贵州飞机有限责任公司 | Multipurpose airplane wheel speed signal simulation system |
| CN111308919A (en) * | 2018-12-12 | 2020-06-19 | 广州汽车集团股份有限公司 | Wheel speed signal transmission method, device, terminal and computer readable storage medium |
| CN112051838A (en) * | 2020-09-16 | 2020-12-08 | 奇瑞汽车股份有限公司 | Test system and method of EPS controller |
| CN112147976A (en) * | 2020-08-12 | 2020-12-29 | 上汽通用五菱汽车股份有限公司 | Wheel speed simulation system and method |
-
2017
- 2017-07-25 CN CN201720907472.4U patent/CN207081990U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308919A (en) * | 2018-12-12 | 2020-06-19 | 广州汽车集团股份有限公司 | Wheel speed signal transmission method, device, terminal and computer readable storage medium |
| CN111308919B (en) * | 2018-12-12 | 2021-07-27 | 广州汽车集团股份有限公司 | Wheel speed signal transmission method, device, terminal and computer readable storage medium |
| CN110963073A (en) * | 2019-12-24 | 2020-04-07 | 中航贵州飞机有限责任公司 | Multipurpose airplane wheel speed signal simulation system |
| CN110963073B (en) * | 2019-12-24 | 2022-12-09 | 中航贵州飞机有限责任公司 | Multipurpose airplane wheel speed signal simulation system |
| CN112147976A (en) * | 2020-08-12 | 2020-12-29 | 上汽通用五菱汽车股份有限公司 | Wheel speed simulation system and method |
| CN112147976B (en) * | 2020-08-12 | 2023-03-28 | 上汽通用五菱汽车股份有限公司 | Wheel speed simulation system and method |
| CN112051838A (en) * | 2020-09-16 | 2020-12-08 | 奇瑞汽车股份有限公司 | Test system and method of EPS controller |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180309 |
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| CF01 | Termination of patent right due to non-payment of annual fee |