CN209327259U - Hydrogen gas detector - Google Patents
Hydrogen gas detector Download PDFInfo
- Publication number
- CN209327259U CN209327259U CN201821804828.2U CN201821804828U CN209327259U CN 209327259 U CN209327259 U CN 209327259U CN 201821804828 U CN201821804828 U CN 201821804828U CN 209327259 U CN209327259 U CN 209327259U
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- module
- hydrogen gas
- gas detector
- mcu
- power conversion
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 239000001257 hydrogen Substances 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000011324 bead Substances 0.000 claims abstract description 9
- 230000001629 suppression Effects 0.000 claims abstract description 8
- 230000001052 transient effect Effects 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 230000001012 protector Effects 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model relates to a kind of hydrogen gas detectors, it solves the problems such as existing hydrogen detection circuit electrical stability is poor, including Vehicular hydrogen detection circuit, Vehicular hydrogen detection circuit includes supplying cell module, power conversion module, wheatstone bridge circuits, instrument amplifier and MCU module, Transient Suppression Diode and high frequency magnetic bead are connected separately between supplying cell module and power conversion module, power conversion module includes BUCK circuit and low pressure difference linear voltage regulator, wheatstone bridge circuits are connected by instrument amplifier with filter module, filter module is connected with MCU module, MCU module is connected with analog voltage output end.The utility model enhances circuit EMI performance by the way that Transient Suppression Diode and high frequency magnetic bead is added in feeder ear；Double loop power supply strong antijamming capability, the high-precision output voltage of two-way gives sensor, MCU and instrument amplifier power supply respectively, so that the more accurate stable work of system.
Description
Technical field
The utility model relates to hydrogen detection technique fields, and in particular to a kind of hydrogen gas detector.
Background technique
With the continuous development of domestic and international fuel cell car technology, it is whole that hydric safe has become fuel cell car
The content that vehicle cannot be ignored safely, and hydrogen gas sensor module becomes the key components and parts of hydrogen detection.The electricity of hydrogen detection
Road then becomes hydrogen and detects whether reliable key component.Existing fuel cell car is generally all equipped with hydrogen gas concentration sensor
To detect density of hydrogen, testing principle generally uses oxide resistor method or thermocatalytic method, by density of hydrogen detection sensor
The highest point for needing detection zone is set, hydrogen gas concentration sensor is sampled by fuel cell controller, to parse
Density of hydrogen value out.The problems such as however, this kind of detection device is deposited: accuracy is low, poor reliability, simultaneously as existing hydrogen
The hydrogen gas concentration sensor of gas detection device is usually directly to be connected with on-vehicle battery, the electrical stability of hydrogen gas concentration sensor
Difference not can guarantee the safety of vehicle in this way, deposit some potential safety problems.
In order to solve the shortcomings of the prior art, people have carried out long-term exploration, propose miscellaneous solution
Scheme.For example, Chinese patent literature discloses a kind of adaptive density of hydrogen detection circuit based on hydrogen gas sensor
Including Wheatstone bridge module, piecewise linearity amplification module, analog-to-digital conversion module, voltage signal school [201720300683.1],
Quasi-mode block, single-chip microcontroller and power module, the piecewise linearity amplification module, which can be realized, exports the Wheatstone bridge module
The amplification of voltage, and when output voltage span is larger, it can guarantee that small signal will not be interfered by other power frequency components；It is described
The electric bridge right upper arm of Wheatstone bridge module is made of digital regulation resistance CAT5113 and precision resister, and digital regulation resistance draws
Foot is connected with the single-chip microcontroller, issues control command by single-chip microcontroller, accurately controls potentiometer input resistance.
Above scheme solves the problems, such as existing hydrogen detection circuit detection accuracy difference to a certain extent, but the program according to
So there is many deficiencies, for example, the electrical stability difference etc. of the components such as hydrogen gas concentration sensor.
Summary of the invention
The purpose of this utility model be in view of the above-mentioned problems, provide it is a kind of design rationally, electrical stability it is good hydrogen inspection
Survey device.
In order to achieve the above objectives, the utility model uses following technical proposal: this hydrogen gas detector, including on-board hydrogen
Gas detection circuit, the Vehicular hydrogen detection circuit include supplying cell module, and the supplying cell module is connected with electricity
Source conversion module, the Wheatstone bridge electricity that the power conversion module is constituted respectively and by hydrogen gas sensor and several resistance
Road, instrument amplifier and MCU module are connected, and are connected separately with wink between the supplying cell module and power conversion module
State inhibits diode and high frequency magnetic bead, and the power conversion module includes BUCK circuit and low pressure difference linear voltage regulator, and
The BUCK circuit is connected with the hydrogen gas sensor in wheatstone bridge circuits, the low pressure difference linear voltage regulator respectively and
Instrument amplifier is connected with MCU module, and the wheatstone bridge circuits are connected by instrument amplifier with filter module, and institute
The filter module stated is connected with MCU module, and the MCU module is connected with analog voltage output end.This hydrogen gas detector
In Vehicular hydrogen detection circuit can integrate on pcb board, by by pcb board be arranged in a detection shell, then general
Detection shell is placed on the purpose that density of hydrogen detection in compartment is realized in compartment.
In above-mentioned hydrogen gas detector, the BUCK circuit and low pressure difference linear voltage regulator are respectively adopted reversed resistance to
Press the diode of 300V or more mutually isolated.
In above-mentioned hydrogen gas detector, the BUCK circuit is depressured chip using LMR14020.
In above-mentioned hydrogen gas detector, the low pressure difference linear voltage regulator has ENABLE pin, over-voltage and over-current
Module and overheat protector module.
In above-mentioned hydrogen gas detector, the instrument amplifier uses INA331 amplifier chip.
In above-mentioned hydrogen gas detector, there is AD sampling module and DAC converter, and institute in the MCU module
The AD sampling module stated is connected with filter module, and the DAC converter is connected with analog voltage output end.
Clamper is equipped in above-mentioned hydrogen gas detector, between the DAC converter and analog voltage output end to filter
Wave module.
In above-mentioned hydrogen gas detector, the wheatstone bridge circuits, instrument amplifier, MCU module, power supply electricity
Pond module, power conversion module and clamper filter module are integrated on pcb board.
In above-mentioned hydrogen gas detector, the MCU module is connected with the transmitting-receiving of the LIN for being connected with vehicle ECU
Device.
Compared with prior art, utility model has the advantages that
1, by the way that Transient Suppression Diode and high frequency magnetic bead is added in feeder ear, enhance circuit EMI performance；Double loop power supply
Strong antijamming capability, the high-precision output voltage of two-way gives sensor, MCU and instrument amplifier power supply respectively, so that system
More accurate stable work.
2, by building wheatstone bridge circuits, density of hydrogen is sampled, is amplified, detection accuracy is high.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram；
In figure, supplying cell module 1, Transient Suppression Diode 11, high frequency magnetic bead 12, power conversion module 2, BUCK circuit
21, low pressure difference linear voltage regulator 22, ENABLE pin 221, over-voltage and over-current module 222, overheat protector module 223, favour stone electricity
Bridge circuit 3, hydrogen gas sensor 31, resistance 32, instrument amplifier 4, MCU module 5, AD sampling module 51, DAC converter 52, filter
Wave module 6, analog voltage output end 7, clamper filter module 8, LIN transceiver 9.
Specific embodiment
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, this hydrogen gas detector, including Vehicular hydrogen detection circuit, Vehicular hydrogen detection circuit here
It can integrate on pcb board, by being arranged pcb board in a detection shell, then will test shell and being placed in compartment
Realize the purpose of compartment density of hydrogen detection, wherein Vehicular hydrogen detection circuit includes supplying cell module 1, supplying cell mould
Block 1 is connected with power conversion module 2, the favour that power conversion module 2 is constituted respectively and by hydrogen gas sensor 31 and several resistance 32
Stone bridge circuit 3, instrument amplifier 4 and MCU module 5 are connected, and divide between supplying cell module 1 and power conversion module 2
It is not connected with Transient Suppression Diode 11 and high frequency magnetic bead 12, by the way that Transient Suppression Diode 11 and height is added in feeder ear
Frequency magnetic bead 12 enhances circuit EMI performance, later respectively by BUCK circuit 21 and low pressure difference linear voltage regulator 22 to input power
Voltage conversion is carried out, power conversion module 2 here may include BUCK circuit 21 and low pressure difference linear voltage regulator 22, and BUCK
Circuit 21 is connected with the hydrogen gas sensor 31 in wheatstone bridge circuits 3, and low pressure difference linear voltage regulator 22 amplifies with instrument respectively
Device 4 is connected with MCU module 5, and wheatstone bridge circuits 3 are connected by instrument amplifier 4 with filter module 6, and filter module 6 and
MCU module 5 is connected, and MCU module 5 is connected with analog voltage output end 7.It is powered by supplying cell module 1, building favour stone electricity
Density of hydrogen value precise translation after differential voltage value, by instrument amplifier 4, is supplied MCU module 5 by bridge circuit 3 after filtering
AD acquisition is carried out, carries out analog voltage output using DAC converter 52.
Wherein, in the present embodiment the BUCK circuit 21 of two-way power supply and low pressure difference linear voltage regulator 22 be respectively adopted it is reversed resistance to
It presses the diode of 300V or more mutually isolated, prevents from interfering with each other.
Wherein, BUCK circuit 21 is depressured chip using LMR14020.BUCK circuit uses the dedicated decompression chip of TI
LMR14020 powers to sensor, supports the voltage input of wide-voltage range 4V-40V, the ultra low quiescent power consumption of 40uA internal
Included compensation and over-voltage, overheat protector and short-circuit protection, output electric current can reach 2A, and working sensor electric current is less than or equal to
400ma, which fully meets requirement and there are enough allowances.
Preferably, low pressure difference linear voltage regulator 22 here have ENABLE pin 221, over-voltage and over-current module 222 and
Overheat protector module 223.Here LDO low pressure difference linear voltage regulator 22 is steady using the low pressure difference linearity of ONsemiconductor
Depressor, output voltage 5V, electric current are exported up to 200ma, and output accuracy is ± 2%, supports the voltage of wide-voltage range 5V-40V
Input, dedicated ENABLE pin and internal watchdog function, the included over-voltage and over-current in inside and overheat protector, high-precision output
Voltage is to MCU and instrument amplifier power supply so that the more accurate stable work of system.
Further, instrument amplifier 4 here uses INA331 amplifier chip, passes through hydrogen gas sensor 31 and outside
Precision resister 32 constitutes wheatstone bridge circuits 3, density of hydrogen value is converted to accurate voltage value, by instrument amplifier
4 are amplified to the voltage of suitable MCU sampling, and instrument amplifier 4 uses the high-precision rail-to-rail amplifier INA331 of TI, and precision is
0.02%, 2ppm/ DEG C, low maladjustment voltage ± 250uV, high cmrr 94dB DC, it is ensured that do not lost by the signal of amplifier
Very.There is AD sampling module 51 and DAC converter 52, and AD sampling module 51 is connected with filter module 6, DAC in MCU module 5
Converter 52 is connected with analog voltage output end 7, wherein is equipped with clamper between DAC converter 52 and analog voltage output end 7 and filters
Wave module 8.The AD sampling module 51 of amplified signal supply MCU module 5 is sampled, and is turned using 5 inside DAC of MCU module
Parallel operation 52 exports the analog voltage signal of corresponding density of hydrogen value.
Preferably, MCU module 5 here is connected with the LIN transceiver 9 for being connected with vehicle ECU, i.e. whole process
MCU module 5 is communicated by LIN communications protocol with automobile ECU, guarantees that module safety is effectively run
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although supplying cell module 1, Transient Suppression Diode 11, high frequency magnetic bead 12, power supply is used more herein to turn
Change the mold block 2, BUCK circuit 21, low pressure difference linear voltage regulator 22, ENABLE pin 221, over-voltage and over-current module 222, overheat protector
Module 223, wheatstone bridge circuits 3, hydrogen gas sensor 31, resistance 32, instrument amplifier 4, MCU module 5, AD sampling module
51, the terms such as DAC converter 52, filter module 6, analog voltage output end 7, clamper filter module 8, LIN transceiver 9, but simultaneously
A possibility that being not excluded for using other terms.The use of these items is only for be more convenient to describe and explain the utility model
Essence；It is contrary to the spirit of the present invention to interpret them as any one of the additional limitations.
Claims (9)
1. a kind of hydrogen gas detector, including Vehicular hydrogen detection circuit, the Vehicular hydrogen detection circuit includes power supply electricity
Pond module (1), the supplying cell module (1) are connected with power conversion module (2), the power conversion module (2) point
The wheatstone bridge circuits (3) that do not constitute and by hydrogen gas sensor (31) and several resistance (32), instrument amplifier (4) and
MCU module (5) is connected, which is characterized in that is separately connected between the supplying cell module (1) and power conversion module (2)
Have Transient Suppression Diode (11) and a high frequency magnetic bead (12), the power conversion module (2) include BUCK circuit (21) and
Low pressure difference linear voltage regulator (22), and the hydrogen gas sensor in the BUCK circuit (21) and wheatstone bridge circuits (3)
(31) it is connected, the low pressure difference linear voltage regulator (22) is connected with instrument amplifier (4) with MCU module (5) respectively, described
Wheatstone bridge circuits (3) are connected by instrument amplifier (4) with filter module (6), and the filter module (6) and MCU
Module (5) is connected, and the MCU module (5) is connected with analog voltage output end (7).
2. hydrogen gas detector according to claim 1, which is characterized in that the BUCK circuit (21) and low voltage difference line
The diode that reverse withstand voltage 300V or more is respectively adopted in property voltage-stablizer (22) is mutually isolated.
3. hydrogen gas detector according to claim 2, which is characterized in that the BUCK circuit (21) uses
LMR14020 is depressured chip.
4. hydrogen gas detector according to claim 1 or 2 or 3, which is characterized in that the low pressure difference linear voltage regulator
(22) there is ENABLE pin (221), over-voltage and over-current module (222) and overheat protector module (223).
5. hydrogen gas detector according to claim 4, which is characterized in that the instrument amplifier (4) uses
INA331 amplifier chip.
6. hydrogen gas detector according to claim 4, which is characterized in that have AD sampling in the MCU module (5)
Module (51) and DAC converter (52), and the AD sampling module (51) is connected with filter module (6), the DAC conversion
Device (52) is connected with analog voltage output end (7).
7. hydrogen gas detector according to claim 6, which is characterized in that the DAC converter (52) and simulation electricity
It presses and is equipped with clamper filter module (8) between output end (7).
8. hydrogen gas detector according to claim 7, which is characterized in that the wheatstone bridge circuits (3), instrument
Amplifier (4), MCU module (5), supplying cell module (1), power conversion module (2) and clamper filter module (8) are integrated
On pcb board.
9. hydrogen gas detector according to claim 1, which is characterized in that the MCU module (5) be connected with for and
Vehicle ECU connected LIN transceiver (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821804828.2U CN209327259U (en) | 2018-11-02 | 2018-11-02 | Hydrogen gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821804828.2U CN209327259U (en) | 2018-11-02 | 2018-11-02 | Hydrogen gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209327259U true CN209327259U (en) | 2019-08-30 |
Family
ID=67709308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821804828.2U Active CN209327259U (en) | 2018-11-02 | 2018-11-02 | Hydrogen gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209327259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044573A (en) * | 2019-11-28 | 2020-04-21 | 浙江大华技术股份有限公司 | Fault detection circuit and method for gas sensor |
| CN113904593A (en) * | 2021-10-15 | 2022-01-07 | 中国空空导弹研究院 | PWM motor driving system capable of inhibiting EMI |
-
2018
- 2018-11-02 CN CN201821804828.2U patent/CN209327259U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044573A (en) * | 2019-11-28 | 2020-04-21 | 浙江大华技术股份有限公司 | Fault detection circuit and method for gas sensor |
| CN113904593A (en) * | 2021-10-15 | 2022-01-07 | 中国空空导弹研究院 | PWM motor driving system capable of inhibiting EMI |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230328 Address after: 318020 No. 128 Xinjiang Road, Chengjiang Street, Huangyan District, Taizhou City, Zhejiang Province Patentee after: Xinli automotive electronics (Taizhou) Co.,Ltd. Address before: 318020 No. 128 Xinjiang Road, Chengjiang Street, Huangyan District, Taizhou City, Zhejiang Province Patentee before: SAILING TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 2298, Central Avenue, the Taihu Lake Street, Changxing County, Huzhou City, Zhejiang Province, 313100 Patentee after: Xinli Automotive Electronics (Zhejiang) Co.,Ltd. Country or region after: China Address before: 318020 No. 128 Xinjiang Road, Chengjiang Street, Huangyan District, Taizhou City, Zhejiang Province Patentee before: Xinli automotive electronics (Taizhou) Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |