CN208420236U - A kind of non-interfering formula pressure-detecting device of car room brake force rack - Google Patents

Abstract

The utility model discloses a kind of non-interfering formula pressure-detecting devices of car room brake force rack, including single-chip microcontroller, PLC exports amplifying unit, data acquisition module, pressure sensor, data processing terminal, ABS system brake force rack and DC power supply, the single-chip microcontroller is connected with PLC output amplifying unit, PLC output amplifying unit is connected with ABS system brake force rack, four pressure sensors are clipped in ABS system brake force rack respectively and lead to outside the fluid pressure line of four wheels, four pressure sensors are connected with data acquisition module respectively, data acquisition module is connect by usb bus with data processing terminal, data processing terminal is connected with single-chip microcontroller, the DC power supply is connected with PLC output amplifying unit.The pressure sensor of the utility model uses non-interfering formula fibre optical sensor, and is equipped with fuse, has the advantages that structure is simple, reusable rate is high, applied widely.

Description

A kind of non-interfering formula pressure-detecting device of car room brake force rack

Technical field

The utility model relates to field of automobile control, in particular to a kind of non-interfering formula pressure of car room brake force rack Detection device.

Background technique

Anti-blocking brake system of automobile is a kind of passively auto-safety mechanism, can shorten braking distance, improve braking When driving direction stability and operability, avoid that automobile whipping occurs in service braking operation or deviate predetermined lane. ABS is as the important measure to guarantee personal safety, and at home and abroad the entrucking rate in various types of automobile productions is higher and higher. ABS system bring safety avoids the generation of many accidents, so, the fault detection of ABS system is just become more It is important.The eye of scholar both domestic and external has focused on the fault diagnosis of ABS system at leisure, and put into a large amount of energy go it is perfect ABS system improves driving safety.

The fault detection of current ABS system both domestic and external is mainly that testing stand is built in road real train test and interior.Due to The pavement test of ABS system must be on some dedicated road surfaces, and required site area must be big, and spend high；Examination Required detection device is tested, the preparation and entire test process the time it takes that test needs to do are very long；ABS system only exists The lower progress emergency braking of high speed could open, so the risk of real train test is high；The test of ABS system is highly susceptible to ring The repeatability analysis of the influence in border, data is difficult.So the actual road test of ABS system can only be suitable for the automobile of certain model Distribution type test or part are inspected by random samples, are not suitable for the periodic detection of a large amount of automobiles, therefore, more scholars and researcher are sight Laboratory experiment platform is turned to.Using smaller occupied area, lower cost, there is detection speed, higher safety faster Property, better repeatability, and it is not affected by environment.In braking process, when (i.e. slip rate is non-close to the state of locking for wheel Stable region) when, ABS system can reduce rapidly the brake pressure in pipeline, and slip rate is made to be restored to the best (stabilization of slip rate Region), the automatic adjustment by hydraulic control unit for brake force enables slip rate to be stably held in desired slip rate Near, it is optimal braking effect, is finally reached the purpose for reducing traffic accident.

Summary of the invention

In order to solve the above-mentioned technical problem, the utility model provide a kind of structure is simple, at low cost, detection accuracy is high, peace The non-interfering formula pressure-detecting device of car room brake force rack of good perfection.

The technical solution that the utility model solves the above problems is: a kind of non-interfering formula pressure of car room brake force rack Detection device, including single-chip microcontroller, PLC export amplifying unit, data acquisition module, pressure sensor, data processing terminal, ABS Braking system power rack and DC power supply, eight inputs of eight output ports and PLC the output amplifying unit of the single-chip microcontroller End is connected, and eight output ends of PLC output amplifying unit are connected with ABS system brake force rack respectively, four pressure sensors It is clipped in ABS system brake force rack respectively to lead to outside the fluid pressure line of four wheels, the signal output of four pressure sensors End is connected with the input terminal of data acquisition module respectively, and the output end of data acquisition module is whole by usb bus and data processing End connection, data processing terminal are connected with single-chip microcontroller, and the DC power supply is connected with PLC output amplifying unit, put for PLC output Big unit provides working power.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the single-chip microcontroller is using 51 serial monolithics Machine.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the pressure sensor use non-interfering formula Fibre optical sensor.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the ABS system brake force rack are selected ABS/ASR brake system.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the data acquisition module and data processing Low first fuse is equipped between terminal.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the single-chip microcontroller and data processing terminal it Between be equipped with the second fuse.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the DC power supply and PLC output are amplified Third fuse is equipped between unit.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the DC power supply select SAIL sail to store Battery.

The above-mentioned non-interfering formula pressure-detecting device of car room brake force rack, the data acquisition module use YE6231 Data collecting instrument.

The utility model has the beneficial effects that:

1, eight output ports of the single-chip microcontroller of the utility model export amplifying unit and ABS system brake force by PLC Rack is connected, and single-chip microcontroller generates sinusoidal signal identical with ABS working frequency and is input to ABS system brake force rack, Neng Goumo Quasi- 8 different signals drive ABS system, to preferably emulate the working condition of ABS system.

2, the utility model between data acquisition module and data processing terminal, single-chip microcontroller and data processing terminal it Between, DC power supply and PLC output amplifying unit between be equipped with fuse, having filled up existing laboratory experiment platform does not have fuse Blank, ensure that the recycling rate of waterused of whole device.

3, the pressure sensor of the utility model uses non-interfering formula fibre optical sensor, and pressure sensor is clipped in ABS system Brake force rack leads to outside the fluid pressure line of wheel, does not need to twist off pipeline screw and is mounted on hydraulic pipeline, the scope of application It is wider.

Detailed description of the invention

Fig. 1 is the overall structure block diagram of the utility model.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and examples.

As shown in Figure 1, a kind of non-interfering formula pressure-detecting device of car room brake force rack, including single-chip microcontroller, PLC are defeated Amplifying unit, data acquisition module, pressure sensor, data processing terminal, ABS system brake force rack and DC power supply out, Single-chip microcontroller uses 51 series monolithics, and eight output ports of the single-chip microcontroller and the PLC in 12 channels export the eight of amplifying unit A input terminal is connected, and eight output ends of PLC output amplifying unit are connected with ABS system brake force rack respectively, four pressures Force snesor is clipped in ABS system brake force rack respectively and leads to outside the fluid pressure line of four wheels, and the pressure sensor is adopted With non-interfering formula fibre optical sensor, the ABS system brake force rack selects ABS/ASR brake system, four pressure sensors Signal output end be connected respectively with the input terminal of data acquisition module, data acquisition module use YE6231 data collecting instrument, The output end of data acquisition module is connect by usb bus with data processing terminal, and data processing terminal is PC machine, data acquisition The first fuse is equipped between module and data processing terminal；Data processing terminal is connected through the second fuse with single-chip microcontroller, institute It states DC power supply and is connected through third fuse with PLC output amplifying unit.

The ABS system brake force rack selects ABS/ASR brake system.Primary car structure bench type arrangement, if operating condition refers to Show lamp, emergency stop switch, numerical control speed adjusting motor drive, alumina metals panel carving original vehicle circuit diagram, two-way external terminal just It analyzes and detects in circuit measuring.Each wheel speed of round flowing water LED light Real time dynamic display and sensor, solenoid valve, hydraulic pump Working condition.Intelligent numerical control adjustment speed is, it can be achieved that accurately adjusting speed and showing simultaneously.It is equipped with OBD2 and detects port, it can Checkout and diagnosis is carried out with instrument, is matched, the operation such as data flow reading.

DC power supply selects SAIL sail battery, exports amplifying unit for PLC and provides working power.The ginseng of DC power supply Numerical value are as follows: voltage rating: 12V；20 hour rate capacity: 60Ah；Cold-starting electric current CCA:480A(SAE).

The parameter value of the PLC output amplifying unit are as follows: output voltage: 12-36V direct current；Input voltage: DC12-36V, Low level is effective；Export electric current: less than 3A；Mounting means: punching, PCB mould group frame；It controls the size in channel: 12 tunnels；Output side Formula: NPN and PNP.

The parameter value of pressure sensor are as follows: power supply: 24VDC；Output signal: 4~20mA, 1~5V, 0~10V, 0~ 20mA, 0~5V, RS485；Range ability: -0.1 ... 0~0.02 ... 100Mpa(0-100KPa)；Compensation temperature: -10~70 DEG C； Medium temperature: -40~125 DEG C；Environment temperature -40~85 DEG C；Watchcase protection: IP65；Pressure type: gauge pressure, absolute pressure, sealing Pressure；Synthesis precision: 0.1 grade；Zero temperature drift: ± 0.03%FS/ DEG C；Sensitivity temperature drift: ± 0.03%FS/ DEG C；Overload Pressure: 200%FS；Long-time stability :≤0.2%FS/；Intrinsic frequency: 5kHz~650kHz.

The parameter value of data acquisition module are as follows: port number: 4；A/D digit: 24；Voltage input characteristic input range :≤ ±10VP；Signal frequency range: DC-50kHz；IEPE input characteristics IEPE excitation power supply: 4mA+24VDC；Signal inputs model It encloses: -10 VP of VP to+10；Signal frequency range: 0.3Hz to 50kHz；Signal-to-noise ratio: 80dB；Amplification factor: X1, x10, x100； Signal frequency range: DC-30kHz (- 3dB ± 1dB)；Precision: ± 0.5%；Highest sample frequency: 96kHz/CH, parallel；It connects Mouthful: USB 2.0；Sample mode: real-time sampling, real-time display, continuous deposit；Outer dimension (mm) 118W × 35H × 150D；For Power supply: USB interface self-powered；Sample mode: real-time sampling, real-time display are continuous to deposit；Power supply: USB interface confession Electricity.

The utility model has built indoor automobile braking force rack non-interfering formula pressure detecting system on the basis of single-chip microcontroller It is whole to be input to 12 channel PLC output amplifying unit progress by single-chip microcontroller generation sinusoidal signal identical with ABS working frequency for system Shape amplification, is then fed into ABS system brake force rack, thus analog drive signal；By non-interfering formula pressure sensor to ABS The pipeline pressure of Braking system power rack is acquired, and is shown in PC machine by data acquisition module.In this hardware system On the basis of, brake force pedal, driving ABS system running are stepped on, and pass through the pressure of pressure sensor detection pipeline.Using number Handle according to processing terminal and then judge the working condition of ABS, the research for anti-locking system for car under indoor situations provides Hardware detection platform.

Claims (9)

1. a kind of non-interfering formula pressure-detecting device of car room brake force rack, it is characterised in that: defeated including single-chip microcontroller, PLC Amplifying unit, data acquisition module, pressure sensor, data processing terminal, ABS system brake force rack and DC power supply out, Eight output ports of the single-chip microcontroller are connected with eight input terminals of PLC output amplifying unit, and PLC exports the eight of amplifying unit A output end is connected with ABS system brake force rack respectively, and it is logical that four pressure sensors are clipped in ABS system brake force rack respectively To the outside of the fluid pressure line of four wheels, the signal output end of four pressure sensors respectively with the input terminal of data acquisition module It is connected, the output end of data acquisition module is connect by usb bus with data processing terminal, data processing terminal and single-chip microcontroller phase Even, the DC power supply is connected with PLC output amplifying unit, exports amplifying unit for PLC and provides working power.

2. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute Single-chip microcontroller is stated using 51 series monolithics.

3. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute Pressure sensor is stated using non-interfering formula fibre optical sensor.

4. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute It states ABS system brake force rack and selects ABS/ASR brake system.

5. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute It states and is equipped with low first fuse between data acquisition module and data processing terminal.

6. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute It states and is equipped with the second fuse between single-chip microcontroller and data processing terminal.

7. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute It states and is equipped with third fuse between DC power supply and PLC output amplifying unit.

8. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute It states DC power supply and selects SAIL sail battery.

9. the non-interfering formula pressure-detecting device of car room brake force rack according to claim 1, it is characterised in that: institute Data acquisition module is stated using YE6231 data collecting instrument.