CN208488215U - A kind of fuel-cell vehicle hydrogen gas leakage detector - Google Patents
A kind of fuel-cell vehicle hydrogen gas leakage detector Download PDFInfo
- Publication number
- CN208488215U CN208488215U CN201821240196.1U CN201821240196U CN208488215U CN 208488215 U CN208488215 U CN 208488215U CN 201821240196 U CN201821240196 U CN 201821240196U CN 208488215 U CN208488215 U CN 208488215U
- Authority
- CN
- China
- Prior art keywords
- circuit
- hydrogen gas
- hydrogen
- power supply
- gas leakage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fuel Cell (AREA)
Abstract
A kind of fuel-cell vehicle hydrogen gas leakage detector, comprising: hydrogen gas sensor and its signal processing circuit, for detecting density of hydrogen in environment and density of hydrogen being converted to electric signal；Amplifying circuit is connect with hydrogen gas sensor and its signal processing circuit output end, for electric signal to be amplified simultaneously output voltage signal；Level shifting circuit is connect with the output end of amplifying circuit, and the voltage signal specification for that will amplify is the analog voltage signal of linear corresponding density of hydrogen, and externally exports；Isolated power supply module is that each functional module and circuit in hydrogen gas detector are powered for vehicle power supply to be isolated with hydrogen gas leakage detector and car power supply voltage is converted to normal voltage.Due to being powered using isolated power supply module, the common mode interference of vehicle power supply is reduced, the accuracy and timeliness of analog quantity output signals are improved.
Description
Technical field
The present invention relates to a kind of hydrogen gas leakage detection devices of hydrogen cell automobile.
Background technique
Hydrogen cell automobile is a kind of electric power for using vehicle-mounted hydrogen fuel cell device to generate as the automobile of power, is had
Efficiently, the advantages that cleaning, comfortable, zero-emission.
Hydrogen cell automobile uses hydrogen as fuel, and hydrogen is a kind of incendivity, may explode in closed environment
Gas, therefore be the necessary condition for ensureing entire car of fuel cell car safety to the real-time reliably monitoring whether hydrogen leaks.When
Preceding hydrogen gas leakage detector characterizes environment density of hydrogen value using analog output is linearly corresponding, but is carried out using vehicle power supply
Whether power supply, hydrogen gas leakage detector output signal unfavorable reliable recognition with density of hydrogen and leak effective vulnerable to interference
Judgement.
Summary of the invention
The application provides a kind of fuel-cell vehicle hydrogen gas leakage detector, so that detector timely and accurately exports letter
Number.
According in a first aspect, providing a kind of fuel-cell vehicle hydrogen gas leakage detector in a kind of embodiment, comprising: hydrogen
Sensor and its signal processing circuit, for detecting density of hydrogen in environment and density of hydrogen being converted to electric signal；Amplification electricity
Road is connect with hydrogen gas sensor and its signal processing circuit output end, is believed for electric signal to be amplified simultaneously output voltage
Number；Level shifting circuit is connect with the output end of amplifying circuit, and the voltage signal specification for that will amplify is linear corresponding hydrogen
The analog voltage signal of gas concentration, and externally export；Isolated power supply module, for by vehicle power supply and hydrogen gas leakage detector every
Being converted to normal voltage from and by car power supply voltage is each functional module and circuit power supply in hydrogen gas detector.
It preferably, further include sample circuit and MCU, the output end connection of the sample circuit and amplifying circuit, being used for will
The analog voltage signal of amplifying circuit output is converted to digital signal；The MCU is connect with sample circuit, is used for sample circuit
The digital signal of output is converted to density of hydrogen value.
It preferably, further include CAN module, CAN module is connect with MCU, total for density of hydrogen value to be output to CAN communication
Line.
Preferably, the amplifying circuit is differential amplifier circuit.
Preferably, the level shifting circuit is addition output circuit.
Preferably, the sample circuit is AD sample circuit.
Preferably, the isolated power supply module uses isolation circuit structure.
According to the fuel-cell vehicle hydrogen gas leakage detector of above-described embodiment, due to being supplied using isolated power supply module
Electricity reduces the common mode interference of vehicle power supply, improves the accuracy and timeliness of analog quantity output signals.It further, should be every
Isolation circuit structure is used from power module, effectively improves the anti-interference ability of output analog signal.Further, electricity is not used only
The analog voltage signal that circuit output corresponds to density of hydrogen is changed in flat turn, also increase sample circuit and MCU, exports corresponding density of hydrogen
Digital signal, two kinds of signal transmission passages are independent of one another, and damage will not influence the work of another way all the way, it is ensured that in environment
The reliable output of hydrogen signal, ensures the safety of fuel cell car.
Detailed description of the invention
Fig. 1 is an embodiment functional block diagram；
Fig. 2 is another embodiment functional block diagram.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Hydrogen gas leakage detection device needs to power to it at work, directlys adopt vehicle power supply in the prior art and supplies it
Electricity is easy to interfere the component in hydrogen gas leakage detection device, to reduce the accuracy of output signal.
Embodiment one:
The present embodiment uses isolated power supply module, vehicle power supply and hydrogen gas leakage detection device is kept apart, so that hydrogen
The interference reduction that gas leakage detection device is subject to guarantees the accuracy of output.
Referring to FIG. 1, fuel-cell vehicle hydrogen gas leakage detector 10 includes:
Hydrogen gas sensor and its signal processing circuit 1, for detecting density of hydrogen in environment and being converted to density of hydrogen
Weak voltage signals.
Differential amplifier circuit 2 is connect with 1 output end of hydrogen gas sensor and its signal processing circuit, is used for hydrogen
The weak voltage signal amplification that sensor and its signal processing circuit 1 export, makes the voltage signal of output convenient for detection processing.
Level shifting circuit 3 is connect with the output end of differential amplifier circuit 2, the voltage signal specification for that will amplify
For the standard voltage signal of 0.5~4.5V, and the standard voltage signal after specification is made linearly to correspond to the analog voltage of density of hydrogen
Signal, and externally export density of hydrogen information.
Isolated power supply module 4,12V the or 24V voltage for exporting vehicle power supply 5 are converted to 5V voltage, and will be vehicle-mounted
Power supply 5 in hydrogen gas leakage detector other functional modules and circuit keep apart, reduce vehicle power supply common mode interference, mention
The accuracy of high analog quantity output signals.Isolated power supply module 4 convert after 5V voltage into each function in hydrogen gas detector
Module and circuit power supply.
In a preferred embodiment, level shifting circuit 3 uses addition output circuit.
In a preferred embodiment, isolated power supply module 4 uses isolation circuit structure, effectively improves output analog signal
Anti-interference ability.
Embodiment two:
Referring to FIG. 2, fuel-cell vehicle hydrogen gas leakage detector includes:
Hydrogen gas sensor and its signal processing circuit 1, for detecting density of hydrogen in environment and being converted to density of hydrogen
Weak voltage signals.
Differential amplifier circuit 2 is connect with 1 output end of hydrogen gas sensor and its signal processing circuit, is used for hydrogen
The weak voltage signal amplification that sensor and its signal processing circuit 1 export makes the voltage signal of output convenient for being detected and used.
Level shifting circuit 3 is connect with the output end of differential amplifier circuit 2, the voltage signal specification for that will amplify
For the standard voltage signal of 0.5~4.5V, and the standard voltage signal after specification is made linearly to correspond to the analog voltage of density of hydrogen
Signal, and externally export density of hydrogen information.
Isolated power supply module 4,12V the or 24V voltage for exporting vehicle power supply 5 are converted to 5V voltage, and will be vehicle-mounted
Power supply 5 in hydrogen gas leakage detector other functional modules and circuit keep apart, reduce vehicle power supply common mode interference, mention
The reliability of high analog quantity output signals.Isolated power supply module 4 convert after 5V voltage into each function in hydrogen gas detector
Module and circuit power supply.
AD sample circuit 6 is connect with the output end of differential amplifier circuit 2, the mould for exporting differential amplifier circuit 2
Quasi- voltage signal is converted to digital signal；
MCU 7 is connect with AD sample circuit 6, and the digital signal for exporting sample circuit, which is computed, is converted to ring
Border density of hydrogen information.
CAN module 8, CAN module 8 are connect with MCU 7, for density of hydrogen value to be output to vehicle-mounted CAN communication bus.Its
In, CAN is to controller local area network (Controller Area Network, CAN).
The present embodiment uses voltage signal sampling of the single-chip microcontroller to hydrogen gas sensor after processing circuit, calculates and passes through
CAN bus exports density of hydrogen information, has further ensured the accuracy and anti-interference ability of information.
The embodiment has two kinds of information output modes of CAN and analog signal output, and two kinds of signal transmission passages are only each other
Vertical, damage will not influence the work of another way all the way, it is ensured that the reliable output of hydrogen signal in environment ensures fuel cell vapour
The safety of vehicle.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (7)
1. a kind of fuel-cell vehicle hydrogen gas leakage detector, characterized by comprising:
Hydrogen gas sensor and its signal processing circuit, for detecting density of hydrogen in environment and density of hydrogen being converted to telecommunications
Number；
Amplifying circuit is connect with hydrogen gas sensor and its signal processing circuit output end, for amplifying simultaneously electric signal
Output voltage signal；
Level shifting circuit is connect with the output end of amplifying circuit, and the voltage signal specification for that will amplify is linear corresponding
The analog voltage signal of density of hydrogen, and externally export；
Isolated power supply module, for being isolated vehicle power supply with hydrogen gas leakage detector and car power supply voltage being converted to standard
Voltage is each functional module and circuit power supply in hydrogen gas detector.
2. hydrogen gas leakage detector as described in claim 1, which is characterized in that further include sample circuit and MCU, the sampling
The connection of the output end of circuit and amplifying circuit, the analog voltage signal for exporting amplifying circuit are converted to digital signal；Institute
It states MCU to connect with sample circuit, the digital signal for exporting sample circuit is converted to density of hydrogen value.
3. hydrogen gas leakage detector as claimed in claim 2, which is characterized in that further include CAN module, CAN module and MCU connect
It connects, for density of hydrogen value to be output to CAN communication bus.
4. hydrogen gas leakage detector as described in claim 1, which is characterized in that the amplifying circuit is differential amplifier circuit.
5. hydrogen gas leakage detector as described in claim 1, which is characterized in that the level shifting circuit is addition output electricity
Road.
6. hydrogen gas leakage detector as claimed in claim 2, which is characterized in that the sample circuit is AD sample circuit.
7. hydrogen gas leakage detector as described in claim 1, which is characterized in that the isolated power supply module uses isolation circuit
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821240196.1U CN208488215U (en) | 2018-08-02 | 2018-08-02 | A kind of fuel-cell vehicle hydrogen gas leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821240196.1U CN208488215U (en) | 2018-08-02 | 2018-08-02 | A kind of fuel-cell vehicle hydrogen gas leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208488215U true CN208488215U (en) | 2019-02-12 |
Family
ID=65246817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821240196.1U Active CN208488215U (en) | 2018-08-02 | 2018-08-02 | A kind of fuel-cell vehicle hydrogen gas leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208488215U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657920A (en) * | 2019-08-23 | 2020-01-07 | 武汉格罗夫氢能汽车有限公司 | Method for detecting concentration of hydrogen in vehicle based on T-BOX |
| CN110658303A (en) * | 2019-08-23 | 2020-01-07 | 武汉格罗夫氢能汽车有限公司 | T-BOX-based in-vehicle hydrogen concentration detection processing method |
| CN112857684A (en) * | 2021-02-20 | 2021-05-28 | 合肥工业大学 | Private garage hydrogen leakage simulation test device and test method |
-
2018
- 2018-08-02 CN CN201821240196.1U patent/CN208488215U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657920A (en) * | 2019-08-23 | 2020-01-07 | 武汉格罗夫氢能汽车有限公司 | Method for detecting concentration of hydrogen in vehicle based on T-BOX |
| CN110658303A (en) * | 2019-08-23 | 2020-01-07 | 武汉格罗夫氢能汽车有限公司 | T-BOX-based in-vehicle hydrogen concentration detection processing method |
| CN110658303B (en) * | 2019-08-23 | 2021-04-23 | 武汉格罗夫氢能汽车有限公司 | T-BOX-based in-vehicle hydrogen concentration detection processing method |
| CN110657920B (en) * | 2019-08-23 | 2021-04-27 | 武汉格罗夫氢能汽车有限公司 | Method for detecting concentration of hydrogen in vehicle based on T-BOX |
| CN112857684A (en) * | 2021-02-20 | 2021-05-28 | 合肥工业大学 | Private garage hydrogen leakage simulation test device and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208488215U (en) | A kind of fuel-cell vehicle hydrogen gas leakage detector | |
| CN206579491U (en) | A kind of low-power consumption Vehicular charger charging system | |
| US11796578B2 (en) | Insulation detection circuit for voltage balance | |
| CN107422218A (en) | Bad load recognizer and recognition methods | |
| CN202057719U (en) | High-side current detecting system | |
| CN208367144U (en) | connection state diagnostic circuit and vehicle | |
| CN204641546U (en) | Natural gas vehicle gas leakage monitoring system | |
| CN102854366A (en) | Low current measuring device and low current measuring method in direct-current power distribution and consumption system | |
| CN103347060A (en) | System and method for collecting long-distance carbon emission data based on vehicle-mounted diagnostic system | |
| CN202748906U (en) | Single-ultraviolet double-infrared compound flame detector | |
| CN109632124B (en) | Onboard monitoring system and method for tethered unmanned aerial vehicle | |
| CN102854372A (en) | High-voltage bus current detection device and battery management system | |
| CN106846825A (en) | Earth magnetism wagon detector, earth magnetism vehicle detecting system and method | |
| CN112051463B (en) | Plug detection circuit of vehicle-mounted diagnosis system and vehicle management system | |
| CN207742316U (en) | Battery detection circuit and battery management system | |
| CN102200562A (en) | Power-supply ground detection device | |
| CN206132836U (en) | Current inspecting circuit and device | |
| CN208847250U (en) | A kind of signal collecting device of batteries of electric automobile packet heat management system test-bed | |
| CN206725670U (en) | Detection means for filter capacitor in PLC module | |
| CN108956061A (en) | A kind of battery case air-tightness intelligent checking system and its detection method | |
| CN104897954A (en) | Multipath intelligent gas meter quiescent current automatic detection device | |
| CN205618271U (en) | Detect dirty stifled instrument of automotive air filter | |
| CN105158626B (en) | A kind of offshore engineering equipment signal deteching circuit | |
| CN204679099U (en) | A kind of vehicle oil controlling/monitoring device | |
| CN204855637U (en) | Battery management system's current sampling circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |