CN204008896U - Automobile instrument EMC test auxiliary test unit - Google Patents
Automobile instrument EMC test auxiliary test unit Download PDFInfo
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- CN204008896U CN204008896U CN201420384190.7U CN201420384190U CN204008896U CN 204008896 U CN204008896 U CN 204008896U CN 201420384190 U CN201420384190 U CN 201420384190U CN 204008896 U CN204008896 U CN 204008896U
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 230000011664 signaling Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 11
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000011161 development Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to electronic automobile meter Electromagnetic Compatibity Test Technology field, be particularly related to a kind of automobile instrument EMC test auxiliary test unit, comprise the housing and the D.C. regulated power supply that are square box shape, housing forms electro-magnetic screen layer, in housing, be provided with signal generating circuit, adjustable resistance, the adjusting knob of signal generating circuit and adjustable resistance is revealed in housing and is convenient to outward regulate, on housing, be provided with tri-state switch, splicing ear, the output terminal of D.C. regulated power supply and tri-state switch, signal generating circuit is connected, signal generating circuit, adjustable resistance, tri-state switch provides pwm signal by splicing ear for instrument to be tested respectively, resistance signal, low and high level signal.Housing can be isolated from the outside this device effectively, prevent that this device and laboratory environment are interfering with each other, the setting of splicing ear, facilitates the wiring of instrument to be tested, this device is easy to operate, integrated level is high, practical, avoided described in background technology and problem.
Description
Technical field
The utility model relates to electronic automobile meter Electromagnetic Compatibity Test Technology field, particularly a kind of automobile instrument EMC test auxiliary test unit.
Background technology
Electromagnetic compatibility technology is called for short EMC technology, and electromagnetic compatibility technology is the brand new technical rising along with electronic technology development in recent years, relates to numerous specialties such as physics, microwave technology, computing machine, information analysis processing, and multidisciplinary synthesis is staggered, and technical sophistication degree is high.Along with the widespread use of electronic technology on automobile, automotive EMC problem also becomes increasingly conspicuous, and jointly becomes vehicle three pollute greatly with discharge, noise.Along with the development of automotive electronics, automotive electronics device electromagnetic compatibility problem has been subjected to increasing concern, automobile instrument is as the important electron device on automobile, its electromagnetic compatibility problem directly has influence on vehicle safety problem, therefore to carry out electromagnetic compatibility test to instrument, be called for short EMC test.
Because instrument will be carried out function debugging before and after EMC test, the pin wire harness of instrument own is too many, and the part pinout of different instrument is different, and these just, for the larger trouble that in debugging and test process, wiring brings, cause the waste of test period.In instrument EMC test process, will get rid of in addition all loads outside instrument and the EMC problem of utility appliance, this will negate carries and utility appliance also will reach the EMC class requirement of instrument.Need to design a kind of utility appliance that can change instrument EMC test mode for these problems, can solve loaded down with trivial details wiring problem, can definitely test again class requirement, can not impact test findings.
Utility model content
The purpose of this utility model is to provide a kind of automobile instrument EMC test auxiliary test unit, facilitate instrument carry out EMC test and test result accurate.
For realizing above object, the technical solution adopted in the utility model is: a kind of automobile instrument EMC test auxiliary test unit, comprise the housing and the D.C. regulated power supply that are square box shape, housing forms electro-magnetic screen layer, in housing, be provided with signal generating circuit, adjustable resistance, the adjusting knob of signal generating circuit and adjustable resistance is revealed in housing and is convenient to outward regulate, on housing, be provided with tri-state switch, splicing ear, the output terminal of D.C. regulated power supply and tri-state switch, signal generating circuit is connected, signal generating circuit, adjustable resistance, tri-state switch provides pwm signal by splicing ear for instrument to be tested respectively, resistance signal, low and high level signal.
Compared with prior art, there is following technique effect in the utility model: housing can be isolated from the outside this device effectively, prevent that this device and laboratory environment are interfering with each other, the setting of splicing ear, facilitate the wiring of instrument to be tested, this device is easy to operate, integrated level is high, practical, avoided described in background technology and problem.
Brief description of the drawings
Fig. 1 is this apparatus structure schematic diagram, and figure comprises instrument to be detected;
Fig. 2 is tri-state switch and other unit connection diagrams, and the tri-state switch being wherein connected with D.C. regulated power supply only illustrates one;
Fig. 3 is the circuit diagram of signal generating circuit.
Embodiment
Below in conjunction with Fig. 1 to Fig. 3, the utility model is described in further detail.
Consult Fig. 1, a kind of automobile instrument EMC test auxiliary test unit, comprises the housing 10 and the D.C. regulated power supply 20 that are square box shape, and housing 10 forms electro-magnetic screen layer, avoids in test the circuit of housing 10 inside and the mutual interference of surrounding environment phase.In housing 10, be provided with signal generating circuit 11, adjustable resistance 12, signal generating circuit 11 is revealed in outer being convenient to of housing 10 with the adjusting knob of adjustable resistance 12 and regulates, on housing 10, be provided with tri-state switch 13, splicing ear 14, the output terminal of D.C. regulated power supply 20 is connected with tri-state switch 13, signal generating circuit 11, and signal generating circuit 11, adjustable resistance 12, tri-state switch 13 provide pwm signal, resistance signal, low and high level signal by splicing ear 14 for instrument to be tested respectively.Here by splicing ear 14 is set, be convenient to being connected between this device and instrument to be tested, after instrument to be tested is determined, the needed signal of each pin of splicing ear 14 is also just determined, before test, each pin of splicing ear 14 is connected with tri-state switch 13, signal generating circuit 11, adjustable resistance respectively.
As preferred version of the present utility model, described housing 10 is made of metal or housing 10 is made of plastics and the inside surface of plastic casing 10 is coated with electro-magnetic screen layer, housing 10 shield effectivenesses that all-metal is made are good, the interior plating electro-magnetic screen layer of plastic casing 10 is lower from cost, is convenient to batch machining and produces.The selection of splicing ear 14 is relevant with instrument to be tested, in the present embodiment, the wire harness of instrument to be tested has 32 pins, described splicing ear 14 is D connector, D connector is also referred to as D type interface, arrange after D connector, instrument to be tested forms plug-in type with this device and coordinates, convenient connection.
Consult Fig. 2, in the time of test, some pin of instrument to be tested need to receive low and high level signal, and some pin need to receive pwm signal, also some pin need to receive resistance signal, for the ease of the input of these signals, multiple tri-state switch 13 are set here, described tri-state switch 13 has four pins, there are three positions at the driving lever place of tri-state switch 13, upwards stir pin 1,2 and be communicated with, in the time that neutral gear is centre position, pin 1,3 is communicated with, and stirs pin 1,4 downwards and is communicated with; The pin 1 of each tri-state switch 13 is linked respectively on the each pin of splicing ear 14, the pin 2 that receives the corresponding tri-state switch 13 of splicing ear 14 pin of pwm signal is connected with the output terminal of signal generating circuit 11, this tri-state switch 13 is only equivalent to the effect of switch, upwards stir as opening, neutral gear or stir downwards into close; The pin 2 that receives the corresponding tri-state switch 13 of splicing ear 14 pin of resistance signal is connected with adjustable resistance 12, the common formation switch of two tri-state switch 13 here, and when two tri-state switch are all upwards stirred, adjustable resistance 12 is connected with instrument to be tested; The pin 2 that receives the corresponding tri-state switch 13 of splicing ear 14 pin of low and high level signal is connected with the positive and negative electrode of D.C. regulated power supply 20 respectively with pin 4, when these tri-state switch 13 are upwards stirred, what export is high level, no signal output when neutral, while stirring downwards, output be low level.
Preferably, on described housing 10, be also provided with power light 15, power interface 16, the output terminal of D.C. regulated power supply 20 forms grafting with power interface 16 and coordinates, D.C. regulated power supply 20 is connected with tri-state switch 13, signal generating circuit 11 by power interface 16, and power light 15 is lighted/extinguished and represents that D.C. regulated power supply 20 is with/without Voltage-output.Power interface 16 and power light 15 are set, are convenient to be connected with external power supply and can know that power supply has or not input.
For some instrument to be tested, it need to connect CAN network signal, therefore further, on described housing 10, is also provided with CAN signaling interface 17, splicing ear 14 pins that receive CAN network signal are connected with CAN signaling interface 17, and CAN signaling interface 17 is for connecting PC or CAN card.
Existing automobile have 12V system and 24V system point, 12V system is with the difference of 24V system: be applied in the required low and high level voltage of instrument to be tested in two systems different.Here provide respectively two schemes for two kinds of systems: one, described instrument to be tested is for the automobile of 12V system, and the output voltage of D.C. regulated power supply 20 is 13.5V.Instrument to be tested is for the automobile of 24V system described in two for it, and the output voltage of D.C. regulated power supply 20 is 24V, between D.C. regulated power supply 20 and signal generating circuit 11, is provided with pressure unit, and the output voltage of pressure unit is 13.5V.
Consult Fig. 3, the design proposal of signal generating circuit 11 has a variety of, provides a kind of circuit for reference here, and described signal generating circuit 11 comprises chip BTS730, NPN type triode Q1; Between the pin 1 of chip BTS730 and pin 18, be connected with capacitor C 1, between pin 2 and pin 3, be connected with capacitor C 2, pin 4-7 and pin 14-17 are connected with the positive pole of voltage of direct-flow voltage regulation, pin 8,9,10 is connected and passes through resistance R 3 and is connected with the base stage of triode Q1, pin 11,12,13 is connected and passes through light emitting diode ground connection, between pin 14 and pin 18, be parallel with capacitor C 3, C4, pin 18 is by resistance R 1 ground connection, pin 18 is connected with two stiff ends of adjustable resistance R2 respectively with pin 20, and pin 19 is connected with the mobile terminal of adjustable resistance R2; Base stage, the emitter of triode Q1 pass through respectively resistance R 4, resistance R 5 ground connection, the collector of triode Q1 is connected with the positive pole of D.C. regulated power supply 20 by resistance R 6, and the collector of triode Q1 is drawn a branch road and is connected as the output terminal of signal generating circuit 11 and the pin 2 of tri-state switch 13.
In use, (1) is connected the splicing ear of instrument exemplar to be tested and this device 14 to this device; (2) open the cover plate of box body 10, with reference to concrete instrument pinout, the both positive and negative polarity of the output pin of signal generating circuit 11, adjustable resistance 12, CAN signaling interface 17 and power interface 16 is received respectively on corresponding tri-state switch; (3) all tri-state switch 13 are pushed on neutral gear, while preventing from powering on, occur abnormal; (4) voltage of direct-flow voltage regulation 20 is connected with power interface 16, and checks whether power light 15 is lighted, if power light 15 is lighted, carries out next step, if power light 15 is not lighted, needs device to check; (5) contrast instrument pinout, stirs corresponding tri-state switch 13 to suitable gear, watches the variation of pilot lamp on instrument face plate simultaneously; (6) regulate respectively the adjusting knob of the resistance R 2 in adjustable resistance 12, signal generating circuit 11 that fuel oil pointer and water temperature pointer are changed; (7) again PC or CAN are linked and received on testing cassete CAN signaling interface if need to connect CAN network signal; (8) this device, D.C. regulated power supply 20 and instrument to be tested being placed into laboratory together tests, in test process, record the variation of pointer in instrument to be tested, if change the scope that exceedes regulation, illustrate that product is defective, if change in admissible scope, illustrate that product is qualified; (9), after being completed, the instrument that disconnects D.C. regulated power supply 20 and tested, changes an instrument and continues to measure by step 1,3-8.
Claims (8)
1. an automobile instrument EMC test auxiliary test unit, it is characterized in that: comprise the housing (10) and the D.C. regulated power supply (20) that are square box shape, housing (10) forms electro-magnetic screen layer, in housing (10), be provided with signal generating circuit (11), adjustable resistance (12), signal generating circuit (11) is revealed in outer being convenient to of housing (10) with the adjusting knob of adjustable resistance (12) and regulates, on housing (10), be provided with tri-state switch (13), splicing ear (14), the output terminal of D.C. regulated power supply (20) and tri-state switch (13), signal generating circuit (11) is connected, signal generating circuit (11), adjustable resistance (12), tri-state switch (13) provides pwm signal by splicing ear (14) for instrument to be tested respectively, resistance signal, low and high level signal.
2. automobile instrument EMC test auxiliary test unit as claimed in claim 1, is characterized in that: described housing (10) is made of metal or housing (10) is made of plastics and the inside surface of plastic casing (10) is coated with electro-magnetic screen layer; Described splicing ear (14) is D connector.
3. automobile instrument EMC test auxiliary test unit as claimed in claim 1, it is characterized in that: described tri-state switch (13) has four pins, when the driving lever of tri-state switch (13) is in three positions, pin 1,2 is communicated with or pin 1,3 connections or pin 1,4 connections; The pin 1 of each tri-state switch (13) is linked respectively on the each pin of splicing ear (14), and the pin 2 that receives the corresponding tri-state switch of splicing ear (14) pin (13) of pwm signal is connected with the output terminal of signal generating circuit (11); The pin 2 that receives the corresponding tri-state switch of splicing ear (14) pin (13) of resistance signal is connected with adjustable resistance (12); The pin 2 that receives the corresponding tri-state switch of splicing ear (14) pin (13) of low and high level signal is connected with the positive and negative electrode of D.C. regulated power supply (20) respectively with pin 4.
4. automobile instrument EMC test auxiliary test unit as claimed in claim 1, it is characterized in that: on described housing (10), be also provided with power light (15), power interface (16), the output terminal of D.C. regulated power supply (20) forms grafting with power interface (16) and coordinates, D.C. regulated power supply (20) is connected with tri-state switch (13), signal generating circuit (11) by power interface (16), and power light (15) is lighted/extinguished and represents that D.C. regulated power supply (20) is with/without Voltage-output.
5. automobile instrument EMC test auxiliary test unit as claimed in claim 1, it is characterized in that: on described housing (10), be also provided with CAN signaling interface (17), splicing ear (14) pin that receives CAN network signal is connected with CAN signaling interface (17), and CAN signaling interface (17) is for connecting PC or CAN card.
6. automobile instrument EMC test auxiliary test unit as claimed in claim 3, is characterized in that: described instrument to be tested is for the automobile of 12V system, and the output voltage of D.C. regulated power supply (20) is 13.5V.
7. automobile instrument EMC test auxiliary test unit as claimed in claim 3, it is characterized in that: described instrument to be tested is for the automobile of 24V system, the output voltage of D.C. regulated power supply (20) is 24V, between D.C. regulated power supply (20) and signal generating circuit (11), be provided with pressure unit, the output voltage of pressure unit is 13.5V.
8. automobile instrument EMC test auxiliary test unit as claimed in claim 6, is characterized in that: described signal generating circuit (11) comprises chip BTS730, NPN type triode Q1;
Between the pin 1 of chip BTS730 and pin 18, be connected with capacitor C 1, between pin 2 and pin 3, be connected with capacitor C 2, pin 4-7 and pin 14-17 are connected with the positive pole of voltage of direct-flow voltage regulation, pin 8,9,10 is connected and passes through resistance R 3 and is connected with the base stage of triode Q1, pin 11,12,13 is connected and passes through light emitting diode ground connection, between pin 14 and pin 18, be parallel with capacitor C 3, C4, pin 18 is by resistance R 1 ground connection, pin 18 is connected with two stiff ends of adjustable resistance R2 respectively with pin 20, and pin 19 is connected with the mobile terminal of adjustable resistance R2;
Base stage, the emitter of triode Q1 pass through respectively resistance R 4, resistance R 5 ground connection, the collector of triode Q1 is connected with the positive pole of D.C. regulated power supply (20) by resistance R 6, and the collector of triode Q1 is drawn a branch road and is connected with the pin 2 of tri-state switch (13) as the output terminal of signal generating circuit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420384190.7U CN204008896U (en) | 2014-07-11 | 2014-07-11 | Automobile instrument EMC test auxiliary test unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420384190.7U CN204008896U (en) | 2014-07-11 | 2014-07-11 | Automobile instrument EMC test auxiliary test unit |
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| CN204008896U true CN204008896U (en) | 2014-12-10 |
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| CN201420384190.7U Active CN204008896U (en) | 2014-07-11 | 2014-07-11 | Automobile instrument EMC test auxiliary test unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515317A (en) * | 2017-08-25 | 2017-12-26 | 郑州云海信息技术有限公司 | A kind of power supply test tool and method of testing |
| CN109189040A (en) * | 2018-08-06 | 2019-01-11 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of louver controller testing equipment for EMC test |
| CN109444573A (en) * | 2018-10-09 | 2019-03-08 | 国网湖南省电力有限公司 | A kind of terminal electromagnetism compatibility testing device, test method and system |
| CN109459714A (en) * | 2018-10-09 | 2019-03-12 | 国网湖南省电力有限公司 | A kind of fault detector electromagnetism compatibility testing device, test method and system |
| CN110058090A (en) * | 2019-06-05 | 2019-07-26 | 衢州代宇商务咨询有限公司 | A kind of detection device for reducing electromagnetic radiation and electromagnetic radiation being detected |
| CN112415320A (en) * | 2020-12-02 | 2021-02-26 | 一汽解放汽车有限公司 | Radiation anti-interference degree testing system and method based on automobile instrument |
-
2014
- 2014-07-11 CN CN201420384190.7U patent/CN204008896U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515317A (en) * | 2017-08-25 | 2017-12-26 | 郑州云海信息技术有限公司 | A kind of power supply test tool and method of testing |
| CN109189040A (en) * | 2018-08-06 | 2019-01-11 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of louver controller testing equipment for EMC test |
| CN109444573A (en) * | 2018-10-09 | 2019-03-08 | 国网湖南省电力有限公司 | A kind of terminal electromagnetism compatibility testing device, test method and system |
| CN109459714A (en) * | 2018-10-09 | 2019-03-12 | 国网湖南省电力有限公司 | A kind of fault detector electromagnetism compatibility testing device, test method and system |
| CN109459714B (en) * | 2018-10-09 | 2021-06-08 | 国网湖南省电力有限公司 | Electromagnetic compatibility testing equipment, testing method and system for fault indicator |
| CN110058090A (en) * | 2019-06-05 | 2019-07-26 | 衢州代宇商务咨询有限公司 | A kind of detection device for reducing electromagnetic radiation and electromagnetic radiation being detected |
| CN110058090B (en) * | 2019-06-05 | 2019-12-03 | 诸暨市圣元塑胶材料有限公司 | A kind of detection device for reducing electromagnetic radiation and electromagnetic radiation being detected |
| CN112415320A (en) * | 2020-12-02 | 2021-02-26 | 一汽解放汽车有限公司 | Radiation anti-interference degree testing system and method based on automobile instrument |
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