CN209692741U - A kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device - Google Patents
A kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device Download PDFInfo
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- CN209692741U CN209692741U CN201920628224.5U CN201920628224U CN209692741U CN 209692741 U CN209692741 U CN 209692741U CN 201920628224 U CN201920628224 U CN 201920628224U CN 209692741 U CN209692741 U CN 209692741U
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Abstract
The utility model provides a kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device.The vehicle-mounted radio-frequency antenna diagnostic circuit includes power supply, bleeder circuit, low-pass filter and MCU controller, it is divided by the reference voltage that the bleeder circuit being made of resistance R1 and resistance R2 and radio-frequency antenna component to be measured jointly provide power supply, and the voltage of the output of bleeder circuit is acquired by MCU controller, the state of radio-frequency antenna component is detected according to the voltage of the acquisition, is realized without easily and quickly being diagnosed to the failure of vehicle-mounted radio-frequency antenna in the case where carrying out tearing vehicle open.Simultaneously, the radiofrequency signal from radio-frequency antenna component is prevented to pass through by the low-pass filter being connected between radio-frequency antenna component and bleeder circuit, it prevents the received rf communication signal of radio-frequency antenna component institute to be diagnosed circuit decay, can be realized and carry out radio-frequency antenna condition diagnosing in the case where not interfering vehicle-mounted radio-frequency antenna to work normally.
Description
Technical field
The utility model relates to vehicle networking technical field, especially a kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronics
Equipment.
Background technique
Car networking equipment provides the data communication services in local and cloud in such a way that 4G is communicated.When 4G antenna is asked
When topic, will lead to local can not connect with cloud network, and mobile unit be cannot get online at this time, can not provide car networking service.So
And in practical applications, it may result in the problem of 4G cannot get online appearance because having a lot of reasons all, investigation is true
Failure cause can be very cumbersome.Traditional method needs special repair shop, carries out by the maintenance personal of profession and tool
Tear vehicle open, that is, car networking equipment is disassembled, the connection shape of harness and equipment is checked using multimeter or oscillograph etc.
State, this expends a large amount of man power and material.
Therefore, it needs a kind of to can avoid tearing vehicle open and can be with the technology of the quick diagnosis 4G failure cause that cannot get online.
Utility model content
In view of the above problems, the utility model is proposed to overcome the above problem in order to provide one kind or at least partly solve
The certainly vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device of the above problem.
According to the one side of the utility model embodiment, a kind of vehicle-mounted radio-frequency antenna diagnostic circuit is provided, comprising:
Power supply is configured to provide reference voltage for the diagnostic circuit；
Bleeder circuit is configured to divide the reference voltage together with radio-frequency antenna component to be measured, including；Electricity
One end and the power supply of resistance R1 and resistance R2, the resistance R1 are connected to the input terminal of the bleeder circuit, another
End is connected to the output end of the bleeder circuit with the resistance R2, and the resistance R2 is not connected with a termination of the resistance R1
Ground；
Low-pass filter has input terminal and output end, and input terminal is connect with the output end of the bleeder circuit, exports
End is connect with the radio-frequency antenna component of vehicle electronic device, and being configured to will be through the reference voltage after bleeder circuit partial pressure
Signal exports after being filtered to the radio-frequency antenna component, and prevents the radiofrequency signal from the radio-frequency antenna component logical
It crosses；
MCU controller is connect with the output end of the bleeder circuit, is configured to acquire the output of the bleeder circuit
Voltage, and judge according to voltage collected the state of the radio-frequency antenna component.
Optionally, the MCU controller is additionally configured to:
According to the predetermined relationship of the voltage of the output of the bleeder circuit collected and the reference voltage, judgement
The state of the radio-frequency antenna component.
Optionally, the MCU controller is additionally configured to:
When the bleeder circuit collected output voltage in [VCC*R4/ (R4+R1)-x, VCC*R4/ (R4+
R1)+x] in range when, judge the state of the radio-frequency antenna component for normal connection；
When the bleeder circuit collected output voltage in [VCC*R2/ (R1+R2)-x, VCC*R2/ (R1+
R2)+x] in range when, judge the state of the radio-frequency antenna component for open circuit；
When the voltage of the output of the bleeder circuit collected is greater than VCC*R2/ (R1+R2)+x, described in judgement
The state of radio-frequency antenna component is to be shorted to power supply；
When the voltage of the output of the bleeder circuit collected is less than VCC*R4/ (R4+R1)-x, described in judgement
The state of radio-frequency antenna component is to be shorted to ground terminal；
Wherein, VCC indicates the reference voltage；R4 be the resistance R2 and the radio-frequency antenna component internal resistance R3's and
Join resistance, R4=(R3*R2)/(R3+R2)；X is the design margin of the diagnostic circuit.
Optionally, the low-pass filter includes: one end connection radio frequency of inductance L1 and capacitor C1, the inductance L1
Antenna module, the other end are separately connected the output end of the capacitor C1 and the bleeder circuit, and the capacitor C1 is not connected described
One end of inductance L1 is grounded.
Optionally, the vehicle-mounted radio-frequency antenna diagnostic circuit further include:
High-pass filter, has input terminal and output end, and input terminal connects the radio-frequency antenna component, output end connection
The radio-frequency signal processing module of the vehicle electronic device is configured to carry out the radiofrequency signal from the radio-frequency antenna component
It exports after filtering to the radio-frequency signal processing module.
Optionally, the high-pass filter includes: capacitor C2, inductance L2, capacitor C3, inductance L3 and capacitor C4；
The capacitor C2, inductance L3 and capacitor C4 sequential series are handled in the radio-frequency antenna component and the radiofrequency signal
Between module；
One end of the inductance L2 is connected at the tie point between the capacitor C2 and the inductance L3, another termination
Ground；
One end of the capacitor C3 is connected at the tie point between the inductance L3 and the capacitor C4, another termination
Ground.
Optionally, the MCU controller is connect by the AD thief hatch of itself with the output end of the bleeder circuit.
Optionally, the radio-frequency antenna component includes 4G antenna.
According to the another aspect of the utility model embodiment, a kind of vehicle electronic device, including vehicle electronics are additionally provided
Apparatus body and vehicle-mounted radio-frequency antenna diagnosis electricity described in any of the above embodiments applied to the vehicle electronic device ontology
Road.
The vehicle-mounted radio-frequency antenna diagnostic circuit that the utility model embodiment proposes, passes through what is be made of resistance R1 and resistance R2
The reference voltage that bleeder circuit and radio-frequency antenna component to be measured jointly provide power supply divides, and is controlled by MCU
The voltage of the output of device acquisition bleeder circuit processed, examines the state of radio-frequency antenna component according to the voltage of the acquisition
It surveys, realizes without easily and quickly being diagnosed to the failure of vehicle-mounted radio-frequency antenna in the case where carrying out tearing vehicle open.Meanwhile
The radio frequency letter from radio-frequency antenna component is prevented by the low-pass filter being connected between radio-frequency antenna component and bleeder circuit
Number pass through, prevents the received rf communication signal of radio-frequency antenna component institute to be diagnosed circuit decay, can be realized and do not interfering vehicle
It carries in the case that radio-frequency antenna works normally and carries out radio-frequency antenna condition diagnosing.
Further, according to the predetermined relationship of the voltage of the output of bleeder circuit collected and reference voltage, sentence
Normally connecting, open a way, be shorted to power supply, be shorted to four kinds of states of ground terminal for disconnected radio frequency antenna module out, realizes radio-frequency antenna
Quick, the accurate positionin of failure cause.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model
It can be more clearly understood with advantage, it is special below to lift specific embodiment of the present utility model.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Add the above-mentioned and other purposes, advantages and features of clear the utility model.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows the structural representation of the vehicle-mounted radio-frequency antenna diagnostic circuit provided according to an embodiment of the present invention
Figure；
Fig. 2 shows the electrical block diagrams of the vehicle electronic device provided according to an embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.In order to solve the above technical problems, the utility model embodiment provides a kind of vehicle
Radio-frequency antenna diagnostic circuit is carried, vehicle electronic device is can be applied to, radio-frequency antenna component is installed on vehicle electronic device, is used
It is communicated in cloud.Fig. 1 shows the knot of the vehicle-mounted radio-frequency antenna diagnostic circuit 100 according to an embodiment of the present invention
Structure schematic diagram.Referring to Fig. 1, which at least may include: that power supply 110 (is shown as in Fig. 1
The end VCC), bleeder circuit 120, low-pass filter 130 and MCU microcontroller 140 (C-terminal is shown as in Fig. 1).
Power supply 110 is used to provide reference voltage VCC for this diagnostic circuit.In practical applications, power supply 110 can
Using DC voltage source.
Bleeder circuit 120 includes resistance R1 and resistance R2.One end of resistance R1 is connect with power supply 110, as partial pressure
The other end of the input terminal of circuit 120, resistance R1 is connect with resistance R2, the output end as bleeder circuit 120.Resistance R2 does not connect
One end of connecting resistance R1 is grounded.
Low-pass filter 130 has input terminal and output end.The input terminal of low-pass filter 130 and bleeder circuit 120
Output end connection, the output end of low-pass filter 130 and the radio-frequency antenna component 150 (end A is shown as in Fig. 1) of vehicle electronic device
Connection.Low-pass filter 130 exports after being filtered the reference voltage signal after the partial pressure of bleeder circuit 120 to radio-frequency antenna
Component 150, and the radiofrequency signal from radio-frequency antenna component 150 is prevented to pass through.
MCU controller 140 is connect with the output end of bleeder circuit 120, it acquires the electricity of the output of bleeder circuit 120
Pressure.
According to above-mentioned connection relationship it is found that when being diagnosed, the diagnostic signal of radio-frequency antenna is by radio-frequency antenna component 150
(end A) flows to MCU controller 140 (C-terminal) by low-pass filter 130.
In a kind of specific embodiment of the utility model, AD thief hatch and partial pressure that MCU controller 140 passes through itself
The output end of circuit 120 connects, to acquire the voltage of the output of bleeder circuit 120 by AD thief hatch.
There is radio-frequency antenna internal driving (being set as R3) can regard radio-frequency antenna component 150 then when carrying out day radiodiagnosis x
One end for resistance a R3, R3 is connect with the output end of low-pass filter 130, other end ground connection.It is mentioned connecting power supply 110
When being diagnosed for DC reference voltage, since pressure drop is almost 0 when direct current passes through inductance, radio-frequency antenna component 150 it is interior
Resistance R3 is equivalent in parallel with resistance R2.That is, after resistance R2 is in parallel with the internal resistance R3 of radio-frequency antenna component 150 again with resistance
R1 series connection, three jointly divide reference voltage.The output of bleeder circuit 120 is acquired by MCU controller 140
Voltage can detecte out reference voltage VCC by the voltage after R1, R2 and R3 partial pressure, and then can be sentenced according to the voltage after partial pressure
The state of disconnected radio frequency antenna module 150 out, determines failure cause.
The utility model embodiment passes through the bleeder circuit being made of resistance R1 and resistance R2 and radio-frequency antenna group to be measured
The reference voltage that part jointly provides power supply divides, and the output of bleeder circuit is acquired by MCU controller
Voltage, the state of radio-frequency antenna component is detected according to the voltage of the acquisition, is realized without carrying out tearing vehicle open
In the case of easily and quickly the failure of vehicle-mounted radio-frequency antenna is diagnosed.
In addition, being more than the high-frequency signal for setting critical value since low-pass filter can obstruct, weaken, by suitably setting
Surely it is connected to the cutoff frequency of the low-pass filter 130 between radio-frequency antenna component 150 and bleeder circuit 120, the end A can be prevented
Radiofrequency signal (such as radio-frequency antenna component 150 is from the received radiofrequency signal in cloud or radio-frequency antenna component 150 from vehicle electronics
The received radiofrequency signal that will emit to cloud of equipment) by low-pass filter 130, to prevent 150 institute of radio-frequency antenna component
Received rf communication signal is diagnosed circuit decay, can be realized in the case where not interfering vehicle-mounted radio-frequency antenna to work normally
Carry out radio-frequency antenna condition diagnosing.
In an embodiment of the utility model, electricity of the MCU controller 140 in the output for collecting bleeder circuit 120
After pressure, the state of radio-frequency antenna component 150 can be judged according to the voltage of the acquisition and the predetermined relationship of reference voltage VCC.
With continued reference to Fig. 1, when radio-frequency antenna component 150 normally connects, the internal resistance R3 of radio-frequency antenna component 150 is equivalent to
Resistance R2 is in parallel.Assuming that the parallel resistance of internal resistance R3 and resistance R2 are R4, then R4=(R3*R2)/(R3+R2).Resistance R4 again with
Resistance R1 series connection, divides reference voltage VCC.At this point, the voltage of the output of bleeder circuit 120 should be VCC*R4/
(R4+R1)。
When radio-frequency antenna component 150 is opened a way, no current flows through in radio-frequency antenna component 150, then only by resistance R2 and electricity
Resistance R1 series connection divides reference voltage VCC.At this point, the voltage of the output of bleeder circuit 120 should be VCC*R2/ (R1+
R2)。
When radio-frequency antenna component 150 is shorted to power supply, it is equivalent to by resistance R1 short circuit, at this point, bleeder circuit 120 is defeated
Voltage at outlet is naturally larger than corresponding voltage VCC*R2/ when being divided jointly to reference voltage by resistance R1 and resistance R2
(R1+R2)。
When radio-frequency antenna component 150 is shorted to ground terminal (GND), it is equivalent to by resistance R2 short circuit, at this point, bleeder circuit
The voltage of 120 output carries out partial pressure phase to reference voltage jointly certainly less than by internal resistance R3, resistance R2 and resistance R1
The voltage VCC*R4/ (R4+R1) answered.
Therefore, according to the voltage value of the output of the collected bleeder circuit 120 of MCU controller 140 meet it is above-mentioned which
Kind of predetermined relationship, can judge four kinds of states of radio-frequency antenna component 150, including the normal connection status of radio-frequency antenna component,
Radio-frequency antenna component open-circuit condition, radio-frequency antenna component are shorted to the state of power supply, radio-frequency antenna component is shorted to the shape of GND
State.
In the utility model embodiment, due to the influence of the precision (such as resistance precision) of the component of circuit itself, electricity
Unavoidably there are some errors between the measured value and calculated value of pressure.Therefore, in practical applications, MCU controller 140
When by state of the voltage value to judge radio-frequency antenna component 150 of the output for acquiring bleeder circuit 120, it can set and adopt
Tolerance x (referred to herein as design margin) between the voltage value and calculated value collected, the value of design margin x is by examining
The precision (precision etc. of precision, reference voltage including resistance) of component in deenergizing determines.
In one preferred embodiment of the utility model, MCU controller 140 is according to the output of bleeder circuit 120 collected
When the predetermined relationship of voltage and reference voltage VCC at end judges the state of radio-frequency antenna component 150, the diagnositc decision side of use
Case is as follows:
When bleeder circuit 120 collected output voltage in [VCC*R4/ (R4+R1)-x, VCC*R4/ (R4+
R1)+x] in range when, judge the state of radio-frequency antenna component 150 for normal connection.
When bleeder circuit 120 collected output voltage in [VCC*R2/ (R1+R2)-x, VCC*R2/ (R1+
R2)+x] in range when, judge the state of radio-frequency antenna component 150 for open circuit.
When the voltage of the output of bleeder circuit 120 collected is greater than VCC*R2/ (R1+R2)+x, radio frequency is judged
The state of antenna module 150 is to be shorted to power supply.
When the voltage of the output of bleeder circuit 120 collected is less than VCC*R4/ (R4+R1)-x, radio frequency is judged
The state of antenna module 150 is to be shorted to GND.
Herein, reference voltage VCC, resistance R1, R2, R4 are defined as described above, and x is this diagnostic circuit described above
Design margin.
By judging to be emitted according to the voltage of the output of bleeder circuit collected and the predetermined relationship of reference voltage
Normally connecting, open a way, be shorted to power supply, be shorted to four kinds of states of ground terminal for frequency antenna module, it is former to realize radio-frequency antenna failure
Quick, the accurate positionin of cause.
With continued reference to Fig. 1, in an embodiment of the utility model, the low-pass filtering in this vehicle-mounted radio-frequency antenna diagnostic circuit
Device 130 may include inductance L1 and capacitor C1.One end of inductance L1 connects radio-frequency antenna component 150, and the other end is separately connected electricity
Hold the output end of C1 and bleeder circuit 120.Capacitor C1 is not connected with one end ground connection of inductance L1.The utility model embodiment is to inductance
The value of L1 and capacitor C1 are not especially limited, can cutoff frequency according to actual needs set.Additionally need explanation
It is that other low-pass filters, such as RC low-pass filter can also be used in the utility model embodiment, as long as it allows signal
In low frequency or DC component pass through.
With continued reference to Fig. 1, in an embodiment of the utility model, this vehicle-mounted radio-frequency antenna diagnostic circuit can also include height
Bandpass filter 160.High-pass filter 160 has input terminal and output end, and input terminal connects radio-frequency antenna component 150, output
The radio-frequency signal processing module 170 (end B is shown as in Fig. 1) of end connection vehicle electronic device.Radiofrequency signal is by radio-frequency antenna component
150 (ends A) enter high-pass filter 160, and high-pass filter 160 filters the radiofrequency signal from radio-frequency antenna component 150
After wave, export through output end to radio-frequency signal processing module 170 (end B).Specifically, radio-frequency signal processing module 170 passes through certainly
The aerial signal input port of body is connect with the output end of high-pass filter 160, after the filtering to receive the output of high-pass filter 160
Radiofrequency signal.By the way that high-pass filtering is arranged between radio-frequency antenna component and the radio-frequency signal processing module of vehicle electronic device
Device can prevent the interference of the direct current or low frequency diagnostic signal of diagnostic circuit to radiofrequency signal, thereby may be ensured that radiofrequency signal
Communication quality.
With continued reference to Fig. 1, in an embodiment of the utility model, the high-pass filtering in this vehicle-mounted radio-frequency antenna diagnostic circuit
Device 160 may include: capacitor C2, inductance L2, capacitor C3, inductance L3 and capacitor C4.Capacitor C2, inductance L3 and capacitor C4 sequence are gone here and there
It is associated between radio-frequency antenna component 150 and radio-frequency signal processing module 170.One end of inductance L2 is connected to capacitor C2 and inductance L3
Between tie point at, the other end ground connection.One end of capacitor C3 is connected at the tie point between inductance L3 and capacitor C4, another
End ground connection.The utility model embodiment does not limit the value of capacitor C2, inductance L2, capacitor C3, inductance L3 and capacitor C4 specifically
It is fixed, can cutoff frequency according to actual needs set.It is further to note that listed herewith is only high-pass filter
A kind of embodiment, other high-pass filters can also be used in the utility model embodiment.
In an embodiment of the utility model, radio-frequency antenna component 150 may include 4G antenna.Correspondingly, vehicle electronics
The radio-frequency signal processing module 170 of equipment can be 4G module.Pass through the defeated of 140 automatic collection bleeder circuit 120 of MCU controller
The voltage of (C point) at outlet, according to above-mentioned diagnositc decision scheme, it is easy to it may determine that the connection shape of vehicle-mounted 4G antenna out
State, without tearing vehicle open it is known that whether 4G antenna is installed normally, when the problem of 4G cannot get online occurs, it is easy to
Orient specific problem.
In the utility model embodiment, MCU controller is detecting that radio-frequency antenna component 150 there are when failure, may be used also
Corresponding fault message (or defect content) to be displayed on the screen of the navigator, alternatively, CAN can also be passed through
The vehicles buses such as (Controller Area Network, controller local area network) bus, diagnostic trouble code are sent to vehicle-mounted
Instrument or other nodes, facilitate engineering technology or maintenance personal to quickly locate the problem of being out of order, and improve radio-frequency antenna component
150 diagnosis and maintenance efficiency.
Based on same design, the utility model additionally provides a kind of vehicle electronic device.Fig. 2 shows practical new according to this
The structural schematic diagram of the vehicle electronic device 200 of one embodiment of type, referring to fig. 2, vehicle electronic device 200 is set including vehicle electronics
For ontology 210 and applied to vehicle electronic device ontology such as the vehicle-mounted radio-frequency antenna diagnosis electricity in any embodiment above
Road 100.
It should be noted that above-mentioned all optional embodiments can be any group by the way of combining in practical application
It closes, forms the alternative embodiment of the utility model, this is no longer going to repeat them.
According to the combination of any one above-mentioned alternative embodiment or multiple alternative embodiments, the utility model embodiment can
Reach it is following the utility model has the advantages that
The vehicle-mounted radio-frequency antenna diagnostic circuit that the utility model embodiment proposes, passes through what is be made of resistance R1 and resistance R2
The reference voltage that bleeder circuit and radio-frequency antenna component to be measured jointly provide power supply divides, and is controlled by MCU
The voltage of the output of device acquisition bleeder circuit processed, examines the state of radio-frequency antenna component according to the voltage of the acquisition
It surveys, realizes without easily and quickly being diagnosed to the failure of vehicle-mounted radio-frequency antenna in the case where carrying out tearing vehicle open.Meanwhile
The radio frequency letter from radio-frequency antenna component is prevented by the low-pass filter being connected between radio-frequency antenna component and bleeder circuit
Number pass through, prevents the received rf communication signal of radio-frequency antenna component institute to be diagnosed circuit decay, can be realized and do not interfering vehicle
It carries in the case that radio-frequency antenna works normally and carries out radio-frequency antenna condition diagnosing.
Further, according to the predetermined relationship of the voltage of the output of bleeder circuit collected and reference voltage, sentence
Normally connecting, open a way, be shorted to power supply, be shorted to four kinds of states of ground terminal for disconnected radio frequency antenna module out, realizes radio-frequency antenna
Quick, the accurate positionin of failure cause.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the utility model
Embodiment can be practiced without these specific details.In some instances, be not been shown in detail well known method,
Structure and technology, so as not to obscure the understanding of this specification.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: within the spirit and principles of the present invention, still can to technical solution documented by foregoing embodiments into
Row modification, or equivalent substitution of some or all of the technical features；And these are modified or replaceed, and do not make phase
Technical solution is answered to be detached from the protection scope of the utility model.
Claims (9)
1. a kind of vehicle-mounted radio-frequency antenna diagnostic circuit characterized by comprising
Power supply is configured to provide reference voltage for the diagnostic circuit；
Bleeder circuit is configured to divide the reference voltage together with radio-frequency antenna component to be measured, including；Resistance R1
With resistance R2, one end of the resistance R1 and the power supply are connected to the input terminal of the bleeder circuit, the other end with
The resistance R2 is connected to the output end of the bleeder circuit, and the resistance R2 is not connected with one end ground connection of the resistance R1；
Low-pass filter has input terminal and output end, and input terminal connect with the output end of the bleeder circuit, output end and
The radio-frequency antenna component of vehicle electronic device connects, and being configured to will be through the reference voltage signal after bleeder circuit partial pressure
It exports after being filtered to the radio-frequency antenna component, and the radiofrequency signal from the radio-frequency antenna component is prevented to pass through；
MCU controller is connect with the output end of the bleeder circuit, is configured to acquire the electricity of the output of the bleeder circuit
It presses, and judges the state of the radio-frequency antenna component according to voltage collected.
2. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 1, which is characterized in that the MCU controller also configures
Are as follows:
According to the predetermined relationship of the voltage of the output of the bleeder circuit collected and the reference voltage, described in judgement
The state of radio-frequency antenna component.
3. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 2, which is characterized in that the MCU controller also configures
Are as follows:
When the bleeder circuit collected output voltage [VCC*R4/ (R4+R1)-x, VCC*R4/ (R4+R1)+
X] in range when, judge the state of the radio-frequency antenna component for normal connection；
When the bleeder circuit collected output voltage [VCC*R2/ (R1+R2)-x, VCC*R2/ (R1+R2)+
X] in range when, judge the state of the radio-frequency antenna component for open circuit；
When the voltage of the output of the bleeder circuit collected is greater than VCC*R2/ (R1+R2)+x, the radio frequency is judged
The state of antenna module is to be shorted to power supply；
When the voltage of the output of the bleeder circuit collected is less than VCC*R4/ (R4+R1)-x, the radio frequency is judged
The state of antenna module is to be shorted to ground terminal；
Wherein, VCC indicates the reference voltage；R4 is resistance R2 electricity in parallel with the internal resistance R3 of the radio-frequency antenna component
Resistance, R4=(R3*R2)/(R3+R2)；X is the design margin of the diagnostic circuit.
4. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 1, which is characterized in that
The low-pass filter includes: one end connection radio-frequency antenna component of inductance L1 and capacitor C1, the inductance L1, separately
One end is separately connected the output end of the capacitor C1 and the bleeder circuit, and the capacitor C1 is not connected with one end of the inductance L1
Ground connection.
5. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 1, which is characterized in that further include:
High-pass filter, has input terminal and an output end, and input terminal connects the radio-frequency antenna component, described in output end connection
The radio-frequency signal processing module of vehicle electronic device is configured to be filtered to from the radiofrequency signal of the radio-frequency antenna component
After export to the radio-frequency signal processing module.
6. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 5, which is characterized in that
The high-pass filter includes: capacitor C2, inductance L2, capacitor C3, inductance L3 and capacitor C4；
The capacitor C2, inductance L3 and capacitor C4 sequential series are in the radio-frequency antenna component and the radio-frequency signal processing module
Between；
One end of the inductance L2 is connected at the tie point between the capacitor C2 and the inductance L3, other end ground connection；
One end of the capacitor C3 is connected at the tie point between the inductance L3 and the capacitor C4, other end ground connection.
7. vehicle-mounted radio-frequency antenna diagnostic circuit according to claim 1, which is characterized in that the MCU controller passes through certainly
The AD thief hatch of body is connect with the output end of the bleeder circuit.
8. vehicle-mounted radio-frequency antenna diagnostic circuit described in any one of -7 according to claim 1, which is characterized in that the radio frequency day
Line component includes 4G antenna.
9. a kind of vehicle electronic device characterized by comprising vehicle electronic device ontology and be applied to the vehicle mounted electric
Vehicle-mounted radio-frequency antenna diagnostic circuit described in any one of the claims 1-8 of sub- apparatus body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920628224.5U CN209692741U (en) | 2019-05-05 | 2019-05-05 | A kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920628224.5U CN209692741U (en) | 2019-05-05 | 2019-05-05 | A kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209692741U true CN209692741U (en) | 2019-11-26 |
Family
ID=68608417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920628224.5U Active CN209692741U (en) | 2019-05-05 | 2019-05-05 | A kind of vehicle-mounted radio-frequency antenna diagnostic circuit and vehicle electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987413A (en) * | 2020-07-03 | 2020-11-24 | 惠州市德赛西威智能交通技术研究院有限公司 | Vehicle-mounted antenna device and detection method thereof |
| CN113820531A (en) * | 2020-06-19 | 2021-12-21 | 拓荆科技股份有限公司 | Semiconductor equipment with radio frequency system state controlled |
-
2019
- 2019-05-05 CN CN201920628224.5U patent/CN209692741U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820531A (en) * | 2020-06-19 | 2021-12-21 | 拓荆科技股份有限公司 | Semiconductor equipment with radio frequency system state controlled |
| CN111987413A (en) * | 2020-07-03 | 2020-11-24 | 惠州市德赛西威智能交通技术研究院有限公司 | Vehicle-mounted antenna device and detection method thereof |
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Effective date of registration: 20220330 Address after: 430051 No. b1336, chuanggu startup area, taizihu cultural Digital Creative Industry Park, No. 18, Shenlong Avenue, Wuhan Economic and Technological Development Zone, Wuhan, Hubei Province Patentee after: Yikatong (Hubei) Technology Co.,Ltd. Address before: No.c101, chuanggu start up area, taizihu cultural Digital Industrial Park, No.18 Shenlong Avenue, Wuhan Economic Development Zone, Hubei Province Patentee before: HUBEI ECARX TECHNOLOGY Co.,Ltd. |