CN108510909A - Emergency exit sign board and the method for building indoor Internet of Things using emergency exit sign board - Google Patents

Abstract

A kind of method for building indoor Internet of Things the invention discloses emergency exit sign board and using emergency exit sign board, it is laid using the circuit that interior has the emergency exit sign board of installing existing, the Sub 1GHz communication modules with relay function of low cost are installed in direction board, not only its fault message can be uploaded to host computer, the control signal of host computer can also be received, the relay station of each indoor Internet of Things can be become, once needing some indoor terminal accessing the Internet of Things, the Sub 1GHz communication modules by being arranged in terminal are only needed to carry out communication interaction with emergency exit sign board, it can network.Indoor security exit indication plate itself, which is dexterously utilized, in the present invention has position significantly and can cover the speciality of full room, by installing Sub 1GHz communication modules additional, plays the role of indoor Internet of Things relay station, the input without increasing additional trunking.

Description

Safety exit signs and the use of safety exit signs to build indoor Internet of things method

technical field

The invention relates to the technical field of building the Internet of Things, in particular to a safety exit sign and a method for constructing a low-cost indoor Internet of Things by using the safety exit sign.

Background technique

LPWAN (Low-Power Wide-Area Network low-power wide-area Internet of Things) is optimized for M2M (Machine to Machine communication) communication scenarios in Internet of Things applications, powered by batteries, low-speed, ultra-low power consumption , Low duty cycle, covered by a star network, supporting the remote wireless network communication technology of the cellular aggregation gateway with a maximum coverage of up to 100 kilometers for a single node. This technology is a revolutionary Internet of Things access technology in the world in recent years. It has the characteristics of long distance, low power consumption, and low operation and maintenance costs. Compared with existing technologies such as Wi-Fi, Bluetooth, and ZigBee, LPWAN truly realizes Low-cost coverage of the Internet of Things in large areas.

At present, the narrowband Internet of Things (NB-IoT) promoted by operators and the long-range wide area network (LoRaWAN) promoted by enterprises in China are widely used in the field of low-power wireless remote communication, and may become two important LPWAN ( Low Power Wide Area Network) standard. Both use a star network architecture in which terminals are directly connected to base stations. Although a single base station covers a large amount of equipment, because of the high cost of base stations, complex urban environments, especially blind areas such as inside buildings, cannot be covered or require high cost.

Sub-1GHz wireless communication refers to wireless communication operating below the 1GHz frequency band, such as 315MHz, 433MHz, 868MHz, 915MHz, etc. Others also include 300MHz, 387MHz, 470MHz, 779MHz, etc. Different countries have different planning configurations. The advantage of low frequency is that it can obtain a longer transmission distance under the same transmission power. If 315MHz is used, the gap is about 8 times that of Wi-Fi 2.4GHz. If Wi-Fi can reach 100 meters, 315MHz can reach 800 meters. In addition, Sub-1GHz does not require high transmission rate, complex modulation such as 16QAM, 64QAM, etc. The result of simple modulation (such as ASK, FSK, etc.) is that the transmission distance is longer Far, up to several kilometers. As a comparison, under the same transmission power, the traditional wireless communication mode working at 2.4G HZ has a recognized transmission distance: ZigBee is about 70m, Bluetooth is within 10m, and Wi-Fi is about 50m. The overall Sub-1GHz wireless communication technology is a technology that exchanges the communication rate for the communication distance. Compared with the traditional communication method, the communication distance of the single-hop node is extended by more than 20 times under the same transmission power, although its communication rate is only the traditional wireless communication. One-thousandth of that or even lower, but it is enough for most current IoT applications.

Relay technology is to add one or more relay nodes between the base station and the terminal, responsible for one or more forwarding of the wireless signal, that is, the wireless signal needs to go through multiple hops to reach the base station. Taking the simple two-hop relay as an example, a base station-terminal link is divided into two links: base station-relay station and relay station-terminal, so that there is an opportunity to replace a link with poor quality with two links of lower quality. Good link for higher link capacity and better coverage. In the ZigBee network, in addition to the base station equipment, each device node is a relay; in the Wi-Fi network, in order to improve the network coverage, a Wi-Fi repeater will be added to amplify and forward the signal on the line. Wi-Fi Terminals such as mobile phone users can access the IP network by accessing the main router (base station) or repeater. Sub-1GHz relay function is similar to it, its core hardware component is MCU+RF (radio frequency chip) transceiver, RF receives air wireless signals, MCU processes data according to the predefined communication protocol format, if it is a message sent to itself Execute the corresponding instructions, if it is a message from other nodes, it will either amplify the wireless signal or select the corresponding target node according to the route to transmit it through RF. Networking networks with relays generally adopt tree/cluster and mesh (MESH) networking methods.

In order to quickly and safely evacuate people and remove valuables and reduce fire losses in the event of a fire, a sufficient number of safety exits must be designed when designing buildings. Safety exits should be scattered and easy to find, and should be clearly marked. The fire safety exit sign is an important device that can clearly indicate the location of the safety exit, guide people to escape along the correct escape route, control the escape time, and reduce the loss of life and property. At present, the signs based on GB17945-2000/2010 fire emergency standards commonly used in the market have the advantages of reliable operation, high stability, and long life, and are widely used in various public places such as shopping malls, hotels, factories, office buildings, and residential buildings.

At present, there are still some shortcomings in the fire safety exit signs on the market:

(1) The sign is not connected to the Internet of Things and is a completely isolated device that can only be operated locally and cannot report status or remote control. Some signages connected to the Internet of Things also have high network access costs due to the choice of communication methods (the reason is that the base station needs to connect to the Internet of Things and the IP layer network at the same time, the cost is relatively high, and the coverage of a single base station is too small to be shared equally among each The high cost of signs) cannot be promoted.

(2) Due to the above reasons, although there are fault detection circuits and local fault LED lights to display the status of the signs, professional maintenance personnel are still required to regularly inspect and check equipment failures. It is a waste of manpower and prone to sign failures without timely maintenance Case.

(3) The current safety signs basically work around the clock, but in many scenarios, such as shopping malls outside of business hours or schools closing after school, the safety signs can be completely turned off to save energy consumption.

At present, many manufacturers specializing in wireless communication solutions on the market have their own communication solutions for Sub-1GHz ad hoc networks. The repeater is an independent device. Due to the current battery technology limitations, most of the repeaters cannot If it works for a long time (more than half a year) in a battery-powered environment, it needs to be connected to the mains power supply. The mains power supply wiring needs to be planned and reported to the fire safety inspection review before the building is completed. Even if there are ready-made lines, there are still responsibility issues such as the safety of the relay equipment (damage, anti-theft) and the cost of power consumption (although not much). .

Contents of the invention

The purpose of the present invention is to solve the deficiencies in the prior art and provide a safety exit sign with a wireless communication network relay function and a method for constructing a low-cost indoor Internet of Things using the safety exit sign as an indoor Internet of Things relay station.

In order to achieve the above object, the solution of the present invention is:

A safety exit indicator board with a wireless communication network relay function, which includes a signboard housing, a frame arranged on the edge of the indicator board housing, a Sub-1GHz antenna interface and an antenna arranged on the side of the frame, the indication The sub-1GHz communication module, MCU, MOS tube control switch, LED light, fault detection circuit, fault indication light-emitting diode and power supply are arranged in the brand housing. The Sub-1GHz communication module has an RF chip, and the fault detection circuit is connected to a fault The LED is connected to the MCU, the MOS tube control switch and the Sub-1GHz communication module are connected to the MCU, and the power supply and the LED light are connected to the MOS tube control switch.

Further, the RF chips of the Sub-1GHz communication module are CC1120, CC1200, CC1125, CC110L chips produced by TI Company, Si4463/61/60-C, Si4430/31/32-B1, Si4438 chips produced by Silicon Labs, Any one of SX1208, SX1276/77/78/79 and their subsequent upgrade chips produced by Semtech.

The present invention also comprises a kind of method utilizing safe exit indicator board to construct indoor Internet of things, comprises the following steps:

Step A: use the existing circuit layout of the safety exit sign installed in the room to install the Sub-1GHz communication module with relay function in the safety exit sign;

Step B: Use the safety exit sign as the relay station of each indoor Internet of Things. Once a terminal in a certain room needs to be connected to the Internet of Things, it only needs to communicate with the indoor terminal through the Sub-1GHz communication module set on the terminal. The Sub-1GHz communication module of the safety exit sign communicates and interacts to access the network.

Further, the Sub-1GHz communication module of the safety exit sign is connected to the base station or the upper-level relay through the Sub-1GHz networking network, and finally accesses the IP network through the base station to reach the upper computer, so as to realize the purpose of uplink and downlink interaction with the upper computer .

Furthermore, the terminal or the lower-level relay connects to the Sub-1GHz communication module of the safety exit sign through the Sub-1GHz network network, and finally achieves the purpose of uplink and downlink interaction with the upper computer.

After adopting the above scheme, the safety exit signboard of the present invention and the method for constructing the indoor Internet of Things by using the safety exit signboard have the following beneficial effects:

(1) The present invention adopts the Sub-1GHz communication module as the wireless communication mode, and its single-hop coverage is large. At the same time, the relay route forwards the information of the internal equipment of the same Sub-1GHz network, and utilizes the characteristics of the wide distribution of safety exit signs. On-demand deployment, the use of existing power lines can achieve full coverage of the Sub-1GHz network in indoor buildings, and can be used as an important entrance for indoor devices to access the Internet of Things, with low network access costs;

(2) The present invention embeds the Sub-1GHz communication module in a modular form into the widely distributed safety sign housing, which solves the biggest pain point of Sub-1GHz networking - the deployment of repeaters;

(3) The present invention collects safety exit signs to detect faults and pushes them to the host computer through the Sub-1GHz wireless network, so that maintenance personnel can find faults at the first time, and at the same time save manpower for inspections;

(4) The user can remotely control the on/off time of any one/group/all of the LED lights of the safety exit signs, so as to realize on-demand work and reduce unnecessary power consumption. At present, the power of safety exit signs on the market is between 3 and 5W, and the working power of the added Sub-1GHz communication module is 0.1W. Assuming that the working time of a sign is reduced by 10 hours a day, a single device can save 30 per day. ~50W power consumption;

The present invention integrates a Sub-1GHz communication module in the housing of the sign, which can be used as a networking relay node in addition to self-communication, and can be used as an important entrance for other devices to access the Internet of Things. Using the existing circuit layout of the safety exit signs installed indoors, a low-cost Sub-1GHz communication module with relay function is installed on the safety exit signs, not only can it upload its fault information to the host computer , can also receive the control signal of the upper computer, and further make it a relay station for each indoor Internet of Things. Once a certain indoor terminal needs to be connected to the Internet of Things, it only needs to pass the Sub-1GHz communication module set on the terminal Communicate and interact with the safety exit sign in the room to access the network. The invention cleverly utilizes the characteristic that the indoor safety exit sign itself has a prominent position and can cover the whole room. By adding a Sub-1GHz communication module, it plays the role of an indoor Internet of Things relay station without adding additional relay equipment. The input does not affect the appearance.

Description of drawings

Figure 1 is a schematic view of the appearance of the present invention.

Fig. 2 is a schematic diagram of the internal modules of the present invention.

Fig. 3 is a frame diagram of the implementation of the present invention.

Detailed ways

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

As shown in Figures 1 to 3, the present invention discloses a safety exit signboard with a wireless communication networking relay function, which includes a signboard housing 1, a frame 11 arranged on the edge of the signboard housing 1, a set Sub-1GHz antenna interface 12 and antenna 2 on the side of frame 11, Sub-1GHz communication module 3, MCU4, MOS tube control switch 5, LED lamp 6, fault detection circuit 7, Fault indication light emitting diode 8 and power supply 9, the Sub-1GHz communication module 3 has an RF chip, the fault detection circuit 7 is connected to the fault light emitting diode 8, and is connected to the MCU4, and the MOS tube controls the switch 5 and the Sub-1GHz communication The module 5 is connected with the MCU 4 , and the power supply 9 and the LED light 6 are connected with the MOS tube control switch 5 .

Wherein, MCU4 can obtain the current working status of the safety exit sign through the IO port, and send it to the remote host computer through the relay communication module 3, and the MCU4 can control the switch of the LED5 of the safety exit sign through the IO output.

Sub-1GHz refers to the wireless technology that works in the frequency band less than 1GHz, and is mainly distinguished by the selected wireless RF (radio frequency) chip. The RF chip pointed to by the Sub-1GHz communication module 3 of the present invention includes but is not limited to CC1120 produced by TI Company , CC1200, CC1125, CC110L Si4463/61/60-C, Si4430/31/32-B1, Si4438 produced by Silicon Labs, SX1208, SX1276/77/78/79 produced by Semtech and their subsequent upgrade chips.

As shown in Figure 3, the safety exit sign with wireless communication network relay function of the present invention is integrated with a Sub-1GHz communication module 3, which is connected to the base station or superior relay through the Sub-1GHz network network in the uplink, and finally passes through the base station Access the IP network to reach the upper computer, and finally achieve the purpose of uplink and downlink interaction with the upper computer. The terminal or the lower-level relay accesses the relay through the Sub-1GHz networking network to finally achieve the purpose of uplink and downlink interaction of the upper computer.

Still as shown in Figure 3, the safe exit indicator board of the present invention is provided with fault detection circuit 7 inside housing 1, and the ordinary IO or ADC port of MCU4 is connected to fault detection circuit 7 output, can obtain the working condition of current indicator board, Send to the remote host computer through the Sub-1GHz communication module 3.

A MOS tube control switch 5 is connected between the power supply 9 and the LED lamp 6, the switch of the LED lamp 6 is controlled by the MOS tube control switch 5, and the MCU4 controls the switch of the MOS tube through the IO output to achieve the purpose of controlling the switch of the LED lamp.

The present invention also discloses a method for constructing an indoor internet of things utilizing a safe exit sign, comprising the following steps:

Step A: use the existing circuit layout of the safety exit sign installed in the room to install the Sub-1GHz communication module with relay function in the safety exit sign;

Step B: Use the safety exit sign as the relay station of each indoor Internet of Things. Once a terminal in a certain room needs to be connected to the Internet of Things, it only needs to communicate with the indoor terminal through the Sub-1GHz communication module set on the terminal. The Sub-1GHz communication module of the safety exit sign communicates and interacts to access the network.

The Sub-1GHz communication module of the safety exit sign is connected to the base station or the superior relay through the Sub-1GHz networking network, and finally accesses the IP network through the base station to reach the upper computer, so as to realize the purpose of uplink and downlink interaction with the upper computer.

The terminal or the lower-level relay is connected to the Sub-1GHz communication module of the safety exit sign through the Sub-1GHz network network, and finally achieves the purpose of uplink and downlink interaction with the upper computer.

The present invention enables the user to remotely issue commands such as "on/off/query status/group information" to the MCU4 of the safety exit sign through the communication protocol format of the pre-defined safety exit sign equipment and the upper computer, and the MCU4 receives the Execute the corresponding operation after the instruction and feed back the result to the host computer. The user can also send the command of the scheduled task to the MCU4 of the safety exit sign. After receiving the command, the MCU4 saves the scheduled task in the local MCU4, and performs the corresponding operation when the time arrives.

The present invention integrates a Sub-1GHz communication module in the housing of the sign, which can be used as a networking relay node in addition to self-communication, and can be used as an important entrance for other devices to access the Internet of Things. Using the existing circuit layout of the safety exit signs installed indoors, a low-cost Sub-1GHz communication module with relay function is installed on the safety exit signs, which can not only upload the fault information to the host computer, It can also receive the control signal of the upper computer, and further, it can become a relay station of each indoor Internet of Things. Once a certain indoor terminal needs to be connected to the Internet of Things, it only needs to pass through the Sub-1GHz communication module set on the terminal. Communicate and interact with the safety exit sign in the room to access the network. The present invention cleverly utilizes the characteristic that the indoor safety exit sign itself has a prominent position and can cover the whole room. By adding a Sub-1GHz communication module, it plays the role of an indoor Internet of Things relay station without adding additional relay equipment. The input does not affect the appearance.

The above-mentioned embodiments and drawings do not limit the form and style of the product of the present invention, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims (5)

1. a kind of emergency exit sign board, which is characterized in that including：Direction board shell is arranged on the side of direction board shell rim Sub-1GHz antennal interfaces and antenna in frame side is arranged in frame, and being equipped with Sub-1GHz in the direction board shell communicates mould Block, MCU, metal-oxide-semiconductor control switch, LED light, fault detection circuit, indicating fault light emitting diode and power supply, the Sub-1GHz Communication module has RF chips, the fault detection circuit connecting fault light emitting diode, and is connect with MCU, the metal-oxide-semiconductor control System switch and Sub-1GHz communication modules are connect with MCU, and the power supply and LED light switch connection with metal-oxide-semiconductor control.

2. emergency exit sign board as described in claim 1, it is characterised in that：The RF chips of the Sub-1GHz communication modules The Si4463/ to produce for CC1120, CC1200, CC1125, CC110L chip that TI companies produce, Silicon Labs companies 61/60-C, Si4430/31/32-B1, Si4438 chip, Semtech companies produce SX1208, SX1276/77/78/79 and Any one in its subsequent upgrade chip.

3. a kind of method building indoor Internet of Things using emergency exit sign board, includes the following steps:

Step A：The circuit for having the emergency exit sign board of installing existing using interior is laid in the emergency exit sign board Install the Sub-1GHz communication modules with relay function；

Step B：Using the emergency exit sign board as the relay station of each indoor Internet of Things, once it needs some is indoor Terminal is linked into the Internet of Things, it is only necessary to be referred to by the Sub-1GHz communication modules and indoor security outlet that are arranged in the terminal Show that the Sub-1GHz communication modules of board carry out communication interaction, you can network.

4. the method for building indoor Internet of Things using emergency exit sign board as claimed in claim 3, it is characterised in that：It is described The Sub-1GHz communication modules uplink of emergency exit sign board is relayed by Sub-1GHz ad-hoc networks access base station or higher level, Host computer is reached eventually by base station access IP network, realizes the purpose interacted with host computer uplink and downlink.

5. the method for building indoor Internet of Things using emergency exit sign board as claimed in claim 3, it is characterised in that：Terminal Or subordinate relay accesses the Sub-1GHz communication modules of emergency exit sign board by Sub-1GHz ad-hoc networks, is finally reached The purpose interacted with host computer uplink and downlink.