阅读说明：本技术 室内氢气监测方法及监测系统 (Indoor hydrogen monitoring method and monitoring system ) 是由 曾广彬 彭旭 郭玉平 于 2019-11-01 设计创作，主要内容包括：本发明公开一种室内氢气监测方法,包括检测室内停车区域的氢气浓度；判断所述氢气浓度是否大于或等于第一预设阈值；若所述氢气浓度大于或等于第一预设阈值,则生成报警指令；根据所述报警指令,驱动报警器发出报警信号,并将报警信息发送至用户终端。同时,本发明还公开了一种室内氢气监测系统。本发明的技术方案通过实现对室内车辆停放区域的氢气浓度进行实时监测,保证泄露的氢气在发生危险之前,实现报警器报警和远程报警信息传递的功能。(The invention discloses an indoor hydrogen monitoring method, which comprises the steps of detecting the hydrogen concentration of an indoor parking area; judging whether the hydrogen concentration is greater than or equal to a first preset threshold value or not; if the hydrogen concentration is greater than or equal to a first preset threshold value, generating an alarm instruction; and driving an alarm to send an alarm signal according to the alarm instruction, and sending the alarm information to the user terminal. Meanwhile, the invention also discloses an indoor hydrogen monitoring system. According to the technical scheme, the hydrogen concentration of the indoor vehicle parking area is monitored in real time, and the functions of alarm of the alarm and remote alarm information transmission are realized before danger occurs to leaked hydrogen.)

1. An indoor hydrogen monitoring method, comprising:

detecting the hydrogen concentration of an indoor parking area;

judging whether the hydrogen concentration is greater than or equal to a first preset threshold value or not;

if the hydrogen concentration is greater than or equal to a first preset threshold value, generating an alarm instruction;

and driving an alarm to send an alarm signal according to the alarm instruction, and sending the alarm information to the user terminal.

2. An indoor hydrogen monitoring method according to claim 1, wherein before the step of detecting the hydrogen concentration of an indoor parking area, the method further comprises: when the vehicle is sensed to enter the monitoring area, the hydrogen monitoring device in the dormant state is awakened.

3. A method of indoor hydrogen monitoring according to claim 1, further comprising: and driving the air exhaust device to operate according to the alarm instruction.

4. A method of indoor hydrogen monitoring according to claim 3, further comprising:

and if the hydrogen concentration is less than or equal to a second preset threshold value, closing the alarm and the exhaust device, and sending safety information to the user terminal.

5. An indoor hydrogen monitoring method according to claim 1, wherein the step of driving an alarm to send an alarm signal according to the alarm instruction and sending the alarm information to a user terminal comprises:

generating an alarm grade instruction according to the hydrogen concentration;

and driving the alarm to send out a corresponding alarm signal according to the alarm grade instruction, and sending the corresponding alarm information to the user terminal.

6. The utility model provides an indoor hydrogen monitoring system, its characterized in that, including controlling means and with first sensor, alarm, the wireless device that the controlling means electricity is connected, first sensor is used for detecting indoor air parking area's hydrogen concentration, controlling means includes:

the processing module is used for judging whether the hydrogen concentration is greater than or equal to a first preset threshold value or not and generating an alarm instruction when the hydrogen concentration is greater than or equal to the first preset threshold value;

and the control module is used for driving the alarm to send an alarm signal according to the alarm instruction and controlling the wireless device to send the alarm information to the user terminal.

7. An indoor hydrogen monitoring system according to claim 6, wherein the first sensor and the control device are connected by a CAN bus to enable data transmission.

8. An indoor hydrogen monitoring system according to claim 6, further comprising a second sensor electrically connected to the control device, the second sensor being configured to detect whether a vehicle enters the monitored area, the control module being further configured to wake up the hydrogen monitoring device in a dormant state when the second sensor senses that a vehicle enters the monitored area.

9. An indoor hydrogen monitoring system according to claim 6, further comprising an exhaust device electrically connected to the control device, wherein the control module is further configured to drive the exhaust device to operate according to the alarm command.

10. An indoor hydrogen monitoring system according to claim 6, wherein the alarm comprises a buzzer and a warning light.

Technical Field

The invention relates to the field of hydrogen fuel cell automobiles, in particular to an indoor hydrogen monitoring method and system.

Background

With the continuous improvement of the material life of people, the automobile keeping quantity in the world is rapidly increasing, but the increase of the automobile keeping quantity not only causes energy crisis, but also the harmful substances discharged by the automobile become important sources of air pollution, people have to look to the development and utilization of new energy automobiles, and the hydrogen fuel cell automobile becomes a new energy environment-friendly automobile with the market prospect in the 21 st century by virtue of the advantages of cleanness and high efficiency.

Hydrogen used by a hydrogen fuel cell automobile is flammable and explosive gas, so that the hydrogen concentration in the surrounding environment of the automobile is strictly monitored, most of the hydrogen fuel automobiles are parked outdoors at present, the hydrogen can be discharged through the circulation of outdoor air when being leaked, a hydrogen monitoring and alarming system is arranged in the automobile, the hydrogen concentration in the automobile can be detected, but at present, most houses where owners live are equipped with indoor garages downstairs, if the hydrogen fuel cell automobile is parked outside for a long time, not only the aging speed of the automobile is accelerated, but also wastes garage resources, if the hydrogen fuel automobile is parked in an indoor garage, the indoor garage belongs to a closed or semi-closed building, the circulation of air is not smooth, hydrogen is easy to accumulate, so that explosion occurs, therefore, the current hydrogen fuel cell automobile lacks a hydrogen alarm system suitable for indoor monitoring and emergency treatment.

Disclosure of Invention

The invention mainly aims to provide an indoor hydrogen monitoring method, and aims to solve the problem that the conventional hydrogen fuel cell automobile lacks a scheme suitable for indoor hydrogen monitoring and emergency treatment.

In order to achieve the above object, the present invention provides an indoor hydrogen monitoring method, including:

detecting the hydrogen concentration of an indoor parking area;

judging whether the hydrogen concentration is greater than or equal to a first preset threshold value or not;

if the hydrogen concentration is greater than or equal to a first preset threshold value, generating an alarm instruction;

and driving an alarm to send an alarm signal according to the alarm instruction, and sending the alarm information to the user terminal.

Preferably, before the step of detecting the hydrogen concentration of the indoor parking area, the method further includes: when the vehicle is sensed to enter the monitoring area, the hydrogen monitoring device in the dormant state is awakened.

Preferably, the indoor hydrogen monitoring method further includes: and driving the air exhaust device to operate according to the alarm instruction.

Preferably, the indoor hydrogen monitoring method further includes:

and if the hydrogen concentration is less than or equal to a second preset threshold value, closing the alarm and the exhaust device, and sending safety information to the user terminal.

Preferably, the step of driving the alarm to send an alarm signal according to the alarm instruction and sending the alarm information to the user terminal includes:

generating an alarm grade instruction according to the hydrogen concentration;

and driving the alarm to send out a corresponding alarm signal according to the alarm grade instruction, and sending the corresponding alarm information to the user terminal.

In order to achieve the above object, the present invention further provides an indoor hydrogen monitoring system, which includes a control device, and a first sensor, an alarm, and a wireless device electrically connected to the control device, wherein the first sensor is used for detecting a hydrogen concentration in an indoor air parking area, and the control device includes:

the processing module is used for judging whether the hydrogen concentration is greater than or equal to a first preset threshold value or not and generating an alarm instruction when the hydrogen concentration is greater than or equal to the first preset threshold value;

and the control module is used for driving the alarm to send an alarm signal according to the alarm instruction and controlling the wireless device to send the alarm information to the user terminal.

Preferably, the first sensor and the control device are connected by a CAN bus to realize data transmission.

Preferably, the system further comprises a second sensor electrically connected to the control device, the second sensor is configured to detect whether a vehicle enters a monitoring area, and the control module is further configured to wake up the hydrogen monitoring device in a dormant state when the second sensor senses that the vehicle enters the monitoring area.

Preferably, the system further comprises an air exhaust device electrically connected with the control device, and the control module is further used for driving the air exhaust device to operate according to the alarm instruction.

Preferably, the alarm comprises a buzzer and a warning lamp.

The invention has the beneficial effects that: according to the indoor hydrogen monitoring method, the first sensor is used for acquiring the indoor hydrogen concentration in real time, the hydrogen concentration is compared with the preset threshold value of the system, if the hydrogen concentration is larger than the preset threshold value, the alarm is started to give an alarm, the safety of surrounding personnel is guaranteed, the alarm information is sent through the wireless network, remote alarm is achieved, a user is reminded to process the alarm, danger is further avoided, and the safety of the system is improved.

Drawings

FIG. 1 is a flow chart of a first embodiment of a method for monitoring hydrogen in a chamber according to the present invention;

FIG. 2 is a flow chart of a second embodiment of the method for detecting hydrogen in a chamber according to the present invention;

FIG. 3 is a flow chart of a third embodiment of the method for detecting hydrogen in a room according to the present invention;

FIG. 4 is a flow chart of a fourth embodiment of the method for detecting hydrogen in a chamber according to the present invention;

fig. 5 is a functional block diagram of an embodiment of an indoor hydrogen monitoring system according to the present invention.

Detailed Description

In the following, the embodiments of the present invention will be described in detail with reference to the drawings in the following, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an indoor hydrogen monitoring method and a monitoring system, and aims to solve the problem that the conventional hydrogen fuel cell automobile lacks a hydrogen alarm system suitable for indoor monitoring and emergency treatment. By adopting the method and the system, the hydrogen concentration in the garage can be detected, alarm and emergency treatment are realized, and the safety of the hydrogen fuel cell automobile and related personnel is ensured.

In a preferred embodiment, as shown in fig. 1, the present invention provides an indoor hydrogen monitoring method, which includes:

step S10, detecting the hydrogen concentration of the indoor parking area;

specifically, in step S10, there are various hydrogen sensors for detecting hydrogen concentration, such as semiconductor-type sensor, thermoelectric-type sensor, fuel cell-type hydrogen sensor, etc., in this embodiment, a fuel cell-type hydrogen sensor is selected, and the fuel cell-type hydrogen sensor is installed on the ceiling corresponding to each parking space in the garage, and its working principle is to filter the interference gas in the air by using a permselective membrane and a catalytic filter layer, the filtered hydrogen molecules are catalytically decomposed into hydrogen ions and electrons by a working electrode, the electrons are transmitted to a reference electrode by an electrolyte, so that an electromotive force is formed between the two electrodes, each hydrogen sensor transmits an electromotive force signal corresponding to the detected hydrogen concentration to a control device, so as to realize the functions of sensing hydrogen and detecting hydrogen concentration, the hydrogen sensor collects the hydrogen concentration of the air in real time until the vehicle leaves the monitoring range, and the whole-course monitoring of the vehicle is realized.

Step S20, judging whether the hydrogen concentration is larger than or equal to a first preset threshold value;

step S30, if the hydrogen concentration is larger than or equal to a first preset threshold value, generating an alarm instruction;

specifically, the preset threshold is a critical value which is prestored in the system and used for representing that the hydrogen concentration is possibly dangerous, and when the hydrogen concentration is greater than or equal to the preset threshold, it indicates that the hydrogen leakage exists in the hydrogen fuel cell vehicle and the hydrogen fuel cell vehicle is possibly dangerous. The first preset threshold may be set to 2%, after the control device receives the hydrogen concentration obtained by the method in step S10, the control device compares the hydrogen concentration with the first preset threshold through the comparator, when hydrogen leaks and accumulates to a certain concentration, the comparator determines that the hydrogen concentration is greater than or equal to the first preset threshold, and the system generates an alarm instruction according to an internal storage program and transmits the alarm instruction to the controller.

And step S40, driving an alarm to send out an alarm signal according to the alarm instruction, and sending the alarm information to the user terminal.

The controller receives the alarm instruction obtained by the method in the step S30, the alarm is driven to give an alarm, the alarm can select an audible and visual alarm, the audible and visual alarm is installed on a ceiling or other more obvious positions, a better safety reminding effect can be achieved, the attention of surrounding personnel can be effectively attracted through double stimulation of hearing and vision, a user or a garage manager accesses a terminal of the user or the garage manager into the system in advance, when the controller receives the alarm instruction, the system generates and sends alarm information to a mobile phone end or other communication equipment of the user, and even if relevant personnel are not near a vehicle, the danger can be timely discovered, and the remote monitoring function is achieved.

Further, as shown in fig. 2, step S40 specifically includes:

s41, generating an alarm grade instruction according to the hydrogen concentration;

and S42, driving the alarm to send out a corresponding alarm signal according to the alarm grade instruction, and sending the corresponding alarm information to the user terminal.

The limit concentration of hydrogen explosion is 4% -75.6%, if the system only sets up a threshold value and carries out danger identification, the vehicle still takes place danger easily after hydrogen reveals, so carry out the warning of different grades according to hydrogen concentration, can make the security of system higher, as a possible mode, in this embodiment the warning rank divide into two-stage, first preset threshold value corresponds and divide into one-level warning threshold value and second grade warning threshold value, and audible-visual annunciator's buzzer and warning light's alarm mode also correspond and set up to two kinds, when the warning rank is the second grade, audible-visual annunciator sends longer sound, the warning light is yellow, when the warning rank is the one-level, audible-visual annunciator sends continuous sound, the warning light is red. The primary alarm threshold value can be set to 2%, the secondary alarm threshold value can be set to 1%, when the control device reads that the hydrogen concentration is greater than the secondary alarm threshold value and is less than the primary alarm threshold value, secondary alarm is started, secondary alarm information is sent, a user or an administrator is reminded to send a vehicle to a maintenance shop nearby for maintenance, when the read hydrogen concentration is greater than or equal to the primary alarm threshold value, primary alarm is started, primary alarm information is generated and sent to the user or the administrator, and system alarm is enabled to be more intelligent.

As shown in fig. 3, before the step S10, the indoor hydrogen monitoring method further includes the step S1: when the vehicle is sensed to enter the monitoring area, the hydrogen monitoring device in the dormant state is awakened.

Specifically, in step S1, in order to reduce the waste of energy, the system maintains the energy-saving standby state when it is not detected that the vehicle enters the monitored area in the garage, when the vehicle is sensed to enter the monitoring area, a signal is sent to the control interface to wake up the system to enter a monitoring state, step S1 functions as an on button, and various sensors such as a radar sensor, an ultrasonic sensor, an infrared sensor, etc. can be used in this embodiment, as a possible option, in the embodiment, an infrared sensor is selected, an infrared sensor is mounted on a ceiling detection point corresponding to each parking space in the garage, when a vehicle enters the area, infrared rays emitted by the infrared transmitting tube are reflected to the infrared receiving tube due to shielding of the vehicle, and a signal that the vehicle enters the monitoring area is sent to the control device through the integrated circuit.

Further, as shown in fig. 4, the indoor hydrogen monitoring method further includes step S50: and driving the air exhaust device to operate according to the alarm instruction. Particularly, if the system judges that hydrogen concentration is higher than or equal to the predetermined threshold value, then carry out emergency treatment through exhaust device, exhaust device can be the exhaust fan that sets up on indoor wall, and hydrogen is according to the gas diffusion principle when the exhaust fan rotates, constantly follows the air current and discharges outdoors to reduce indoor hydrogen concentration gradually, prevent the emergence of dangerous events such as explosion, make the protection function of system stronger.

Further, as shown in fig. 4, after the above step S50, the indoor hydrogen monitoring method further includes S60: and if the hydrogen concentration is less than or equal to the second preset threshold value, closing the alarm and the exhaust device, and sending the safety information to the user terminal. The second preset threshold is lower than the first preset threshold, so that the system controls the hydrogen concentration in a safer range, as a possible selection mode, the first preset threshold is 2%, the second preset threshold in the embodiment can be selected to be 0.5%, hydrogen is continuously discharged outwards after the exhaust device is started, and if the hydrogen sensor senses that the hydrogen concentration is less than or equal to 0.5%, the hydrogen sensor sends safety information to remind a user through a wireless device, so that the remote monitoring function of the system is further enhanced, and the design is more humanized.

As shown in fig. 5, the present invention further provides an indoor hydrogen monitoring system, which includes a control device 30, and a first sensor 20 electrically connected to the control device 30, an alarm 40, and a wireless device 50, wherein the first sensor 20 is used for detecting the hydrogen concentration in an indoor air parking area. There are many hydrogen sensors for detecting hydrogen concentration, such as semiconductor type sensor, thermoelectric type sensor, fuel cell type hydrogen sensor, etc., in this embodiment, the first sensor 20 can be a fuel cell type hydrogen sensor, which works by filtering interfering gas through a selective permeable membrane and a catalytic filter layer, the filtered hydrogen molecules are catalytically decomposed into hydrogen ions and electrons by a working electrode, the electrons are transmitted to a reference electrode by an electrolyte, and an electromotive force is formed between the two electrodes, and the electromotive force signal corresponds to a signal of hydrogen concentration.

Specifically, hydrogen is the lightest gas known in the world, and therefore tends to accumulate on the ceiling after leakage, and according to the principle of gas diffusion, the accumulated hydrogen gradually diffuses from a high concentration location to a low concentration location. In order to avoid the vehicle when parking, the check point of hydrogen accumulation point and hydrogen sensor does not correspond, can all install the hydrogen sensor on the ceiling that the preceding, middle, back three points of every parking stall correspond, make the system carry out accurate detection to the hydrogen concentration in every parking stall region, further strengthen the security and the practicality of system, at the in-process that the vehicle parked, the hydrogen concentration of the air was gathered in real time to the hydrogen sensor leaves monitoring range until the vehicle, the realization is to the whole control of vehicle parking in-process.

The control device 30 described above includes:

the processing module 31 is configured to determine whether the hydrogen concentration is greater than or equal to a first preset threshold, and generate an alarm instruction when the hydrogen concentration is greater than or equal to the first preset threshold;

and the control module 33 is configured to drive the alarm 40 to send an alarm signal according to the alarm instruction, and control the wireless device 50 to send the alarm information to the user terminal.

Specifically, the preset threshold is a critical value pre-stored by the system and used for representing that the hydrogen concentration is possibly dangerous, when the hydrogen concentration is greater than or equal to a first preset threshold, it is indicated that the hydrogen fuel cell vehicle has hydrogen leakage and is possibly dangerous, the processing module 31 compares the hydrogen concentration obtained by the hydrogen sensor with the first preset threshold in sequence, if at least one hydrogen concentration is found to be greater than or equal to the first preset threshold, the system generates an alarm instruction according to an internal program and sends the alarm instruction to the control module 33, the control module 33 drives the alarm 40 to alarm through the controller, so as to effectively attract the attention of an administrator and evacuate the relevant personnel in time, ensure the safety of the relevant personnel, the system generates an alarm message, and sends the alarm message to a mobile phone terminal of a user or a garage administrator or other communication devices through the wireless device 50, the wireless device 50 may be a network operator, so that the user can find out danger in time even if not near the automobile, thereby realizing a remote alarm function.

In another preferred embodiment, the first sensor 20 and the control device 30 are connected by a CAN bus to achieve data transmission. The garage occupies a large area, the hydrogen sensors are correspondingly arranged on each parking space, the hydrogen sensors are easy to lose or have errors in the process of transmitting data remotely, in order to enhance the accuracy of data transmission, the data CAN be transmitted through the CAN bus, the communication distance of the CAN bus CAN reach as far as 10km, so that the hydrogen sensors and the control device 30 CAN well realize data interaction under the condition of long distance, the CAN bus cable generally adopts a twisted pair shielded cable with characteristic impedance of 120 omega, the anti-interference performance in the data transmission process is enhanced, the control device 30 CAN receive more accurate hydrogen concentration, the CAN protocol eliminates station address coding, the communication data is coded, different nodes CAN receive the same data at the same time, the data communication real-time performance between the nodes of the network formed by the CAN bus is strong, and a redundant structure is easy to form, the reliability and flexibility of the system are improved.

In another preferred embodiment, the indoor hydrogen monitoring system further comprises a second sensor 10 electrically connected to the control device 30, the second sensor 10 is used for detecting whether a vehicle enters the monitoring area, and the control module 33 is further used for waking up the hydrogen monitoring device in a dormant state when the second sensor 10 senses that the vehicle enters the monitoring area. In order to reduce the energy waste, the system keeps an energy-saving standby state when the system does not detect that the vehicle enters a monitoring area in the garage, when the system senses that the vehicle enters the monitoring area, a signal is sent to the control interface to wake up the system, the system starts the first sensor 20 to enter the monitoring state, and a plurality of sensors used for sensing that the vehicle enters the monitoring area in the market are available, such as a radar sensor, an ultrasonic sensor, an infrared sensor and the like.

In another preferred embodiment, the alarm 40 includes a buzzer and a warning light. If the controller receives an alarm instruction, the alarm 40 is driven to give an alarm, the alarm 40 is an audible and visual alarm with a buzzer and a warning lamp, and the audible and visual alarm is arranged on a ceiling or other more obvious positions, so that a better safety reminding effect can be achieved, the attention of related personnel can be effectively attracted through double stimulation of hearing sense and vision, because the limit concentration of hydrogen explosion is 4.0% -75.6%, if only one threshold is set for alarming, a vehicle is still easy to generate danger after hydrogen leakage, and therefore, the safety of the system is higher by setting alarms of different levels, as a possible mode, the alarm level is divided into two levels in the embodiment, the first preset threshold is correspondingly divided into a first-level alarm threshold and a second-level alarm threshold, the alarm modes of the buzzer and the warning lamp of the audible and visual alarm are correspondingly set into two levels, and when the alarm level is the second level, the audible and visual alarm gives out a long sound, the warning lamp is yellow, when the warning level is first level, the audible and visual alarm gives out continuous sound, and the warning lamp is red. As a possible mode, the primary alarm threshold value is set to 2%, the secondary alarm threshold value is set to 1%, when the control device 30 reads that the hydrogen concentration is greater than the secondary alarm threshold value and less than the primary alarm threshold value, the secondary alarm is activated, and when the read hydrogen concentration is greater than or equal to the primary alarm threshold value, the primary alarm is activated.

In another preferred embodiment, the indoor hydrogen monitoring system further comprises an air exhaust device 60 electrically connected to the control device 30, and the control module 33 is further configured to drive the air exhaust device 60 to operate according to the alarm command. As a possible alternative, the exhaust device 60 may be an exhaust fan disposed on the wall surface of the garage, and if the hydrogen concentration is higher than or equal to a first preset threshold, the system drives the exhaust fan to perform emergency treatment, and when the exhaust fan rotates, the hydrogen continuously follows the air flow to be discharged outdoors according to the principle of gas diffusion, thereby gradually reducing the hydrogen concentration indoors, preventing the occurrence of dangerous events such as explosion, and making the protection function of the system stronger. In this embodiment, the exhaust device 60 may include a plurality of wind speed gears, and according to the above-mentioned alarm level, the air flow is driven by different rotation speeds, and when the alarm level information is read as a second level, the control device 30 controls the exhaust fan to rotate at a lower rotation speed to exhaust the low-concentration hydrogen; when reading alarm level information and being the one-level, controlling means 30 improves the rotational speed of exhaust fan, reduces hydrogen concentration fast, and the rotational speed of control exhaust fan not only can be discharged hydrogen, realizes the control to hydrogen concentration, can reduce energy loss moreover.

The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes, which are made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.