CN201947265U - Wireless signal security device for an Internet of things remote meter reading system - Google Patents
Wireless signal security device for an Internet of things remote meter reading system Download PDFInfo
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- CN201947265U CN201947265U CN2011200715078U CN201120071507U CN201947265U CN 201947265 U CN201947265 U CN 201947265U CN 2011200715078 U CN2011200715078 U CN 2011200715078U CN 201120071507 U CN201120071507 U CN 201120071507U CN 201947265 U CN201947265 U CN 201947265U
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Abstract
A wireless signal security device for an Internet of things remote meter reading system relates to an integrated antenna or comprises the integrated antenna and an added amplifying circuit. The integrated antenna is formed by directly connecting a radio frequency cable and an antenna, downgoing signals from a base station are received by the antenna and transmitted to a communication module of a meter reading system collection terminal through the radio frequency cable, and simultaneously, upgoing signals of the communication module of the meter reading system collection terminal are transmitted to the antenna through the radio frequency cable and transmitted to the base station through the antenna. The wireless signal security device for the Internet of things remote meter reading system guarantees that the wireless communication of the meter reading system collection terminal is good and barrier-free, resolves the problem of unstable wireless signals thoroughly, and improves the wireless-signal service capability of terminal equipment.
Description
Technical field
The utility model relates to communicating wireless signals and Internet of Things field, especially Internet of Things long-distance meter-reading system wireless signal ensuring equipment.
Background technology
At present, the power information acquisition system project of checking meter is one of Utilities Electric Co. intelligent grid key project of building, also be country's largest Internet of Things project, this system mainly is made up of the acquisition terminal of checking meter, communication module (the external sucker antenna of this module) and background monitoring center.The acquisition terminal of checking meter mainly is responsible for inquiry, collection and the monitoring of power information; Transmission, the control information that communication module mainly is responsible for information data issues etc.
Check meter acquisition terminal and electric supply meter is interconnected, realizes wireless dialing-up internet by communication module, carries out the transmission and the control of information data by the mobile communications network of telecom operators, thereby ensures collection and the inquiry of acquisition terminal to user power utilization information.Owing to check meter the acquisition terminal installation site many in the corridor depths, basement, the comparatively serious zone of the medium wireless signal shielding of ammeter box, rate is low maybe can't reach the standard grade so very easily cause the acquisition terminal of checking meter to reach the standard grade, and directly causes electric power background monitoring center to carry out long-rangely effectively controlling to acquisition terminal.
According to electric power correlation technique data feedback, the receiving sensitivity index of acquisition terminal communication module be-92dBm, less than general mobile phone-102dBm, acquisition terminal signal strength signal intensity indicator light criterion is:
1. red colored lamp: less than-89dbm; 2. orange lamp :-89dbm～-65dbm between; 3. green light: greater than-65dbm;
Signal strength can satisfy information gathering basically greater than after-the 89dBm, but also has a condition here, and communication module is the signal quality of detection signal also.If the error rate is less than 0.4% o'clock (signal quality 0-1 level), communication is very reliable; The error rate is (signal quality 2-4 level) between 0.4%～3.2%, can guarantee the module dial-up success; The error rate is (5 grades of signal qualitys) between 3.2%～6.4%, and module is in logical and obstructed critical condition; The error rate can't communication in (signal quality 6-7 level) more than 6.4%.
Antenna that communication module carries and cable parameter are as follows:
| The external sucker antenna of name of product Name | Model Type DDA-T900/1800-307 |
| Frequency range 890-960/1710-1880MHz | Height H eight 173 ± 3mm |
| Gain G ain 3.0/3.5dBi | Wire length Cable Length 3m ± 3cm |
| Antenna cable (MHz) | 200 | 400 | 900 | 1800 | 2500 |
| Decay (dB/m) | 0.1862 | 0.3254 | 0.4249 | 0.6652 | 0.9480 |
As seen from the above table, the communication module antenna gain is 3dBi, and the attenuation of cable (is example with GSM) is 0.4249dB/m, long 3 meters of cable, and loss is 1.3dB, the gain of then whole external sucker antenna only is 1.7dBi.The sensitivity of the received signal of communication module in the acquisition terminal equipment of checking meter own is lower, the up-downgoing gain is too little, can't satisfy the communication requirement under the complex environment, usually the equipment requirements wireless signal strength could long-term stable operation about-75dBm, and it is best that operating state just can reach.
In sum, existing power information is checked meter about the low 10dBm of the general mobile phone of communication module incoming level thresholding in the acquisition system, and sensitivity is lower, and existing communication module up-downgoing gain is less, the antijamming capability deficiency can't satisfy the communication requirement under the complex environment; External sucker antenna gain is too little, and cable decay is too big, the wire length deficiency, and in the corridor depths, basement, the serious zone of the medium wireless signal shielding of ammeter box, communication module at all can't operate as normal.Existing common improvement project is with high-gain aerial and is welded to connect at the construction field (site) with the low-loss radio frequency cable, wireless signal can have part to improve, but new fault point and workload have also been increased simultaneously, and the words that blank area is not handled well, be easy to generate the big problem of signal attenuation, the acquisition terminal that causes checking meter can't be uploaded.
Summary of the invention
The purpose of this utility model is the deficiency at the existing acquisition terminal system that checks meter, a kind of Internet of Things long-distance meter-reading system wireless signal ensuring equipment is provided, this device can with prior terminal success ' shaking hands ', thoroughly solve the not enough problem of wireless signal of the prior art, can effectively improve channel gain, signal strength signal intensity and the signal quality of the acquisition terminal equipment of checking meter, ensure power information acquisition system steady operation, the lifting means service ability.
The technical solution of the utility model is:
A kind of Internet of Things long-distance meter-reading system wireless signal ensuring equipment, its integrated antenna, directly be formed by connecting by radio frequency cable line and antenna, antenna receives the downstream signal from the base station, through the communication module of radio frequency cable transmission of downlink signal to the kilowatt meter reading-out system acquisition terminal, simultaneously radio frequency cable with the uplink signal transmissions of kilowatt meter reading-out system acquisition terminal communication module to antenna, by antenna transmission to the base station.
Internet of Things long-distance meter-reading system of the present utility model is a wired connection with the interface of the communication module of wireless signal ensuring equipment and kilowatt meter reading-out system acquisition terminal.
The utility model comprises integral antenna and the unidirectional amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the unidirectional amplifying circuit of transmitted in both directions, transfer to the communication module of kilowatt meter reading-out system acquisition terminal behind the unidirectional amplifying circuit amplification of the transmitted in both directions downstream signal, the unidirectional amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, is sent to the base station by integral antenna.
The unidirectional amplifying circuit of transmitted in both directions of the present utility model comprises the first duplexer S1, the second duplexer S2 and first low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
In the unidirectional amplifying circuit of transmitted in both directions of the present utility model, concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
The utility model comprises integral antenna and the two-way amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the two-way amplifying circuit of transmitted in both directions, transfer to the communication module of kilowatt meter reading-out system acquisition terminal behind the two-way amplifying circuit amplification of the transmitted in both directions downstream signal, the two-way amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, is sent to the base station by integral antenna.
The two-way amplifying circuit of transmitted in both directions of the present utility model comprises the first duplexer S1, the second duplexer S2, first low noise amplifier and second low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the signal input part of second low noise amplifier, the signal output part of second low noise amplifier links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
In the two-way amplifying circuit of transmitted in both directions of the present utility model, concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
The two-way amplifying circuit of transmitted in both directions of the present utility model comprises two duplexers, two low noise amplifiers, two filter and two power amplifiers, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX output of the first duplexer S1 is successively by first low noise amplifier, the downstream signal input TX of the input second duplexer S2 behind first filter and first power amplifier, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX output of the second duplexer S2 is successively by second low noise amplifier, the upward signal input RX of the input first duplexer S1 behind second filter and second power amplifier, the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
Internet of Things long-distance meter-reading system of the present utility model is wired connection or wireless connections with the interface of the communication module of wireless signal ensuring equipment and kilowatt meter reading-out system acquisition terminal.
Antenna of the present utility model is the small-sized whip antenna of high-gain.
The communication module of kilowatt meter reading-out system acquisition terminal of the present utility model is the communication module of GSM, CDMA, WCDMA, CDMA2000 communication standard; For example: the communication module of GSM standard adopts the GPRS communication module.
The beneficial effects of the utility model:
Wireless signal ensuring equipment of the present utility model is to the power information increased functionality of communication module unit in the acquisition system and perfect of checking meter, improve communication module unit up-downgoing radio communication quality, ensure signal to noise ratio, the acquisition terminal radio communication of guaranteeing to check meter is good, and information gathering is accessible.
The utility model has improved channel gain, signal strength signal intensity and the signal quality of the acquisition terminal equipment of checking meter, make that the communication module online is accessible, thoroughly solve power information acquisition system wireless signal instability problem, improved the wireless signal service ability of terminal equipment.
The utility model mainly is to have added the wireless signal ensuring equipment in existing power information is checked meter acquisition system, this device has adopted advanced microelectronic circuit integrated technology, full duplex, integral antenna design; Have the linear power enlarging function, can effectively suppress intermodulation and clutter interference; Equipment adopts the ALC technology, and output level is adjustable continuously, auto_steady amplitude; Built-in automatic gain control, plug and play, and provide power supply indication and uplink and downlink power output just to indicate.The utility model also can be used for water meter, environment protection digital collection, gas meter copying, and the heat supply heating is checked meter, the data acquisition of hydrology water conservancy, fields such as earthquake prediction data acquisition.
The integrated high-gain aerial that the utility model adopts, it is the small-sized whip antenna combination of radio frequency cable line and high-gain, be equipped with 5 meters/15 meters/30 meters/50 meters integral antennas that equal length differs, the installation under the reply varying environment, this antenna is the uplink and downlink signals gain of intensifier equipment effectively.
Device of the present utility model adopts the microminiature design, and volume is little, and is in light weight; Maximum electric power has only 3 watts, and is low in energy consumption, long service life.The device output interface is flexible and changeable, and adaptation ability is strong, goes for any information acquisition system of other industry, and for example the informationization of industries such as Running-water Company, gas company, heat supply heating company is used.
Wireless signal ensuring equipment of the present utility model links to each other with communication module interface in the acquisition terminal of checking meter by SMA elbow interface, integrated high-gain aerial cloth is put into outdoor, the appliance arrangement power supply directly sky from the acquisition terminal casing box of checking meter is opened power taking, and is convenient and simple.
Long-distance meter-reading system of the present utility model can adopt multiple communication standard, such as GSM, CDMA, and WCDMA, other communication standard such as CDMA2000.
Description of drawings
Fig. 1 is the theory diagram of the integrated antenna of ensuring equipment of the present utility model.
Fig. 2 is one of theory diagram of integrated antenna of ensuring equipment of the present utility model and the two-way amplifying circuit of setting up of one-way transmission.
Fig. 3 be integrated antenna of ensuring equipment of the present utility model and the two-way amplifying circuit of one-way transmission set up theory diagram two.
Fig. 4 is one of theory diagram of integrated antenna of ensuring equipment of the present utility model and the two-way amplifying circuit of setting up of transmitted in both directions.
Fig. 5 be integrated antenna of ensuring equipment of the present utility model and the two-way amplifying circuit of transmitted in both directions set up theory diagram two.
Fig. 6 be integrated antenna of ensuring equipment of the present utility model and the two-way amplifying circuit of transmitted in both directions set up theory diagram three.
Fig. 7 is the circuit diagram of Fig. 2.
Fig. 8 is the circuit diagram of Fig. 4.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, be example with GSM communication standard; The communication module of kilowatt meter reading-out system acquisition terminal adopts the GPRS communication module; A kind of Internet of Things long-distance meter-reading system wireless signal ensuring equipment, its integrated antenna, directly be formed by connecting by radio frequency cable line and antenna, antenna receives the downstream signal from the base station, through the GPRS communication module of radio frequency cable transmission of downlink signal to the kilowatt meter reading-out system acquisition terminal, simultaneously radio frequency cable with the uplink signal transmissions of kilowatt meter reading-out system acquisition terminal GPRS communication module to antenna, by antenna transmission to the base station.Described antenna is the small-sized whip antenna of high-gain.During concrete the use, be equipped with 5 meters/15 meters/30 meters/50 meters integral antennas that equal length differs, the installation under the reply varying environment, this antenna is the uplink and downlink signals gain of intensifier equipment effectively.Wherein: the base station is that the public mobile communication base station is a kind of form of radio station, is meant in certain area of radio coverage, and by mobile switching center, and the radio station is believed in the transceiving that the information of carrying out between the mobile telephone terminal is transmitted.
Adopt two kinds of circuit design modes according to being applied to different scenes, promptly 1. a kind of is the equal linear power amplification of uplink and downlink signals, and 2. a kind of is that upward signal does not amplify, the downstream signal linear power amplifies.
According to radio signal propagation characteristic and base station distribution situation, roughly be divided into two kinds of application scenarioss: one, urban applications scene, two, the rural area application scenarios.For the urban applications scene, because the base station, city is intensive, various interference phenomenons are serious, adopt 2. mode can effectively avoid uplink interference to the base station, eliminate and use the influence to big net base station that might produce behind this device.For the rural area application scenarios, because the rural area base station distribution is inhomogeneous, station spacing is big, not as the intensive and signal in base station, city disturbs few, 1. mode is proper so adopt, when improving the upward signal gain, also reduced the limited of up link, also smaller to the influence surface of base station interference simultaneously.
In the urban applications scene: as shown in Figure 2, ensuring equipment of the present utility model comprises integral antenna and the unidirectional amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the unidirectional amplifying circuit of transmitted in both directions, transfer to the GPRS communication module of kilowatt meter reading-out system acquisition terminal behind the unidirectional amplifying circuit amplification of the transmitted in both directions downstream signal, the unidirectional amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal GPRS communication module simultaneously, is sent to the base station by integral antenna.
As shown in Figure 7, the unidirectional amplifying circuit of transmitted in both directions of the present utility model comprises the first duplexer S1, the second duplexer S2 and first low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the GPRS communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal GPRS module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
Described first low noise amplifier comprises triode G1, divider resistance R1, R2 (see figure 7).
As shown in Figure 3, in the unidirectional amplifying circuit of transmitted in both directions of the present utility model, concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
In the application scenarios of rural area: as shown in Figure 4, the utility model comprises integral antenna and the two-way amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the two-way amplifying circuit of transmitted in both directions, transfer to the GPRS communication module of kilowatt meter reading-out system acquisition terminal behind the two-way amplifying circuit amplification of the transmitted in both directions downstream signal, the two-way amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal GPRS communication module simultaneously, is sent to the base station by integral antenna.
As shown in Figure 8, the two-way amplifying circuit of transmitted in both directions of the present utility model comprises the first duplexer S1, the second duplexer S2, first low noise amplifier and second low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the GPRS communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal GPRS module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the signal input part of second low noise amplifier, the signal output part of second low noise amplifier links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
Described first low noise amplifier comprises triode G1, divider resistance R1, R2 (see figure 8).
Described second low noise amplifier comprises triode G2, divider resistance R3, R4 (see figure 8).
As shown in Figure 5, in the two-way amplifying circuit of transmitted in both directions of the present utility model, concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
Internet of Things long-distance meter-reading system of the present utility model links to each other with the interface of the GPRS communication module of kilowatt meter reading-out system acquisition terminal by SMA elbow interface with the wireless signal ensuring equipment.
When the Internet of Things long-distance meter-reading system was used the integrated antenna of wireless signal ensuring equipment, integral antenna linked to each other with the interface of the GPRS communication module of kilowatt meter reading-out system acquisition terminal by SMA elbow interface.
When the Internet of Things long-distance meter-reading system with integrated antenna of wireless signal ensuring equipment and the one-way/two-way transfer of unidirectional amplifying circuit set up, the interface of the common port ANT of the second duplexer S2 of the one-way/two-way transfer of unidirectional amplifying circuit of setting up and the GPRS communication module of kilowatt meter reading-out system acquisition terminal is wired connection or wireless connections; The wired connection mode can be: link to each other by the interface of SMA elbow interface with the GPRS communication module of kilowatt meter reading-out system acquisition terminal.
As shown in Figure 6, the two-way amplifying circuit of transmitted in both directions of the present utility model comprises two duplexers, two low noise amplifiers, two filter and two power amplifiers, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX output of the first duplexer S1 is successively by first low noise amplifier, the downstream signal input TX of the input second duplexer S2 behind first filter and first power amplifier, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the GPRS communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal GPRS module simultaneously, the upward signal output RX output of the second duplexer S2 is successively by second low noise amplifier, the upward signal input RX of the input first duplexer S1 behind second filter and second power amplifier, the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.Two low noise amplifiers of the present utility model are connected corresponding automatic level control circuit ALC and automatic gain control circuit MGC respectively with two power amplifiers.
Two low noise amplifiers of the present utility model are connected corresponding automatic level control circuit ALC and automatic gain control circuit MGC respectively with two power amplifiers; Adopt the ALC technology, output level is adjustable continuously, auto_steady amplitude; Built-in automatic gain control MGC, plug and play, and provide power supply indication and uplink and downlink power output just to indicate.
When the wireless signal ensuring equipment receives downstream signal from the base station, amplify through low noise, filter passes through the amplifirer amplifying power after filtering out the outer clutter of band again, output to the acquisition terminal GPRS communication module of checking meter through duplexer, finish the signal downlink channel function; The wireless signal ensuring equipment through low noise amplification, filtering and power amplification, is sent to the base station by duplexer with upward signal after receiving the upward signal of the acquisition terminal GPRS communication module output of checking meter, and finishes the signal uplink channel function.Consider the fading effect of spacing wave transmission course, in the uplink and downlink passage, be added with MGC and alc circuit respectively, reach channel gain balance and output auto_steady amplitude function.
Before the wireless signal ensuring equipment is installed, check meter the acquisition terminal incoming level-more than the 95dbm, terminal signaling intensity indicator light sends out a warning, electric power background net management center display terminal is not reached the standard grade, and can't carry out remote monitoring; After the wireless signal ensuring equipment is installed, under the situation that all parameters of network remain unchanged, the acquisition terminal signal level of checking meter reaches-80dbm about, signal quality is 1 grade, the bright orange lamp of terminal signaling intensity indicator light, remote monitoring can be effectively carried out in line stabilization on the display terminal of electric power background net management center.
In the application scenarios of rural area: test as can be seen, the wireless signal ensuring equipment uses at overlay area (less than 10 square metres) among a small circle can not cause substantial effect to the operator base station.Mainly be because: the up maximum gain of wireless signal ensuring equipment (10dBm) is GRX=15dB, and descending maximum gain is GTX=20dB, and the maximum noise coefficient is NF=5dB.Suppose that the base station power output is 43dBm, when ensuring equipment reaches maximum output, the downlink port signal is Pout-GTX=10dBm (10mW)-20dB=-10dBm to the maximum, the minimal path loss of this moment from the base station to the ensuring equipment be Ls=PBTS-(10dBm)=43-(10)=53dB.The last line output low noise level of ensuring equipment be PNRX=PN+GRX+NF=-124+15+5=-104dBm (wherein, PN is the environment white noise-124dBm) of 200kHz bandwidth under the normal temperature, then the noise power of the up input in line output low noise arrival base station is on the ensuring equipment: PNBTS=PNRX-Ls=-104dBm-53dB=-157dBm＜-124dBm, the ensuring equipment noise level is submerged under the ambient noise.The RX noise level of a plurality of wireless signal ensuring equipments can produce the power stack, when the quantity of ensuring equipment reaches more than 500 in the sector, the low noise level of its stack is approaching-124dBm, just the critical condition that base station communication is exerted an influence can be reached, the RX receiving sensitivity of base station could be influenced with the sector; Generally speaking, much smaller than 500, therefore can not cause interference with the ensuring equipment of being installed under the sector signals covering to the operator base station.
In the urban applications scene: test as can be seen, because of this contrive equipment adopts no up amplification module, can not produce any external disturbance to the up of base station, so the employed quantity of equipment is unrestricted, and the up interference of macro base station mainly comes from the interference of launching of acquisition terminal GPRS communication module itself, and the size of its interference is only relevant with the employed quantity of the acquisition terminal of checking meter.
Appliance arrangement technical performance reliability of the present invention meets the GB6993-86 standard, and Electro Magnetic Compatibility meets the ETS300694-4 standard.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (10)
1. Internet of Things long-distance meter-reading system wireless signal ensuring equipment, it is characterized in that its integrated antenna, directly be formed by connecting by radio frequency cable line and antenna, antenna receives the downstream signal from the base station, through the communication module of radio frequency cable transmission of downlink signal to the kilowatt meter reading-out system acquisition terminal, simultaneously radio frequency cable with the uplink signal transmissions of kilowatt meter reading-out system acquisition terminal communication module to antenna, by antenna transmission to the base station.
2. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 1 is characterized in that described Internet of Things long-distance meter-reading system is a wired connection with the interface of the communication module of wireless signal ensuring equipment and kilowatt meter reading-out system acquisition terminal.
3. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 1, it is characterized in that it comprises integral antenna and the unidirectional amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the unidirectional amplifying circuit of transmitted in both directions, transfer to the communication module of kilowatt meter reading-out system acquisition terminal behind the unidirectional amplifying circuit amplification of the transmitted in both directions downstream signal, the unidirectional amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, is sent to the base station by integral antenna.
4. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 3, it is characterized in that the unidirectional amplifying circuit of described transmitted in both directions comprises the first duplexer S1, the second duplexer S2 and first low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
5. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 4, it is characterized in that in the unidirectional amplifying circuit of described transmitted in both directions concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
6. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 1, it is characterized in that it comprises integral antenna and the two-way amplifying circuit of the transmitted in both directions of setting up, described integral antenna receives the downstream signal from the base station, integral antenna links to each other with the two-way amplifying circuit of transmitted in both directions, transfer to the communication module of kilowatt meter reading-out system acquisition terminal behind the two-way amplifying circuit amplification of the transmitted in both directions downstream signal, the two-way amplifying circuit of this transmitted in both directions receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, is sent to the base station by integral antenna.
7. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 6, it is characterized in that the two-way amplifying circuit of described transmitted in both directions comprises the first duplexer S1, the second duplexer S2, first low noise amplifier and second low noise amplifier, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX of the first duplexer S1 links to each other with the signal input part of first low noise amplifier, the signal output part of first low noise amplifier links to each other with the downstream signal input TX of the second duplexer S2, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX of the second duplexer S2 links to each other with the signal input part of second low noise amplifier, the signal output part of second low noise amplifier links to each other with the upward signal input RX of the first duplexer S1, and the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
8. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 7, it is characterized in that in the two-way amplifying circuit of described transmitted in both directions concatenated filter or concatenated filter respectively simultaneously on the uplink and downlink signal transmssion line between the first duplexer S1 and the second duplexer S2.
9. Internet of Things long-distance meter-reading system wireless signal ensuring equipment according to claim 6, it is characterized in that the two-way amplifying circuit of described transmitted in both directions comprises two duplexers, two low noise amplifiers, two filter and two power amplifiers, described integral antenna receives the downstream signal from the base station, transfer to the common port ANT of the first duplexer S1, the downstream signal output TX output of the first duplexer S1 is successively by first low noise amplifier, the downstream signal input TX of the input second duplexer S2 behind first filter and first power amplifier, the common port ANT output downstream signal of the second duplexer S2 is through the interface of radio frequency cable to the communication module of kilowatt meter reading-out system acquisition terminal, the common port ANT of this second duplexer S2 receives the upward signal from kilowatt meter reading-out system acquisition terminal communication module simultaneously, the upward signal output RX output of the second duplexer S2 is successively by second low noise amplifier, the upward signal input RX of the input first duplexer S1 behind second filter and second power amplifier, the common port ANT of the first duplexer S1 sends upward signal to the base station by integral antenna.
10. according to the described Internet of Things long-distance meter-reading system wireless signal ensuring equipment of one of claim 3-9, it is characterized in that described Internet of Things long-distance meter-reading system is wired connection or wireless connections with the interface of the communication module of wireless signal ensuring equipment and kilowatt meter reading-out system acquisition terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200715078U CN201947265U (en) | 2011-01-06 | 2011-03-17 | Wireless signal security device for an Internet of things remote meter reading system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120002864.9 | 2011-01-06 | ||
| CN201120002864 | 2011-01-06 | ||
| CN2011200715078U CN201947265U (en) | 2011-01-06 | 2011-03-17 | Wireless signal security device for an Internet of things remote meter reading system |
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| CN201947265U true CN201947265U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200296604U Expired - Fee Related CN201947264U (en) | 2011-01-06 | 2011-01-28 | Wireless signal protection device for remote meter-reading system of internet of things |
| CN2011200715078U Expired - Fee Related CN201947265U (en) | 2011-01-06 | 2011-03-17 | Wireless signal security device for an Internet of things remote meter reading system |
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| CN2011200296604U Expired - Fee Related CN201947264U (en) | 2011-01-06 | 2011-01-28 | Wireless signal protection device for remote meter-reading system of internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372262A (en) * | 2020-02-16 | 2020-07-03 | 山东华箭科工创新科技有限公司 | 5G remote communication relay equipment and communication method thereof |
| CN113676239A (en) * | 2021-08-29 | 2021-11-19 | 广州华成微波技术有限公司 | High-reliability coverage unit of public safety wireless network active distribution system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320437A (en) * | 2014-09-23 | 2015-01-28 | 大唐长春热力有限责任公司 | Uploading method for trade measurement data |
| CN112510345B (en) * | 2019-09-16 | 2023-07-18 | 北京小米移动软件有限公司 | External antenna device, control method and device thereof and storage medium |
-
2011
- 2011-01-28 CN CN2011200296604U patent/CN201947264U/en not_active Expired - Fee Related
- 2011-03-17 CN CN2011200715078U patent/CN201947265U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372262A (en) * | 2020-02-16 | 2020-07-03 | 山东华箭科工创新科技有限公司 | 5G remote communication relay equipment and communication method thereof |
| CN113676239A (en) * | 2021-08-29 | 2021-11-19 | 广州华成微波技术有限公司 | High-reliability coverage unit of public safety wireless network active distribution system |
| CN113676239B (en) * | 2021-08-29 | 2022-07-12 | 广州市瀚云信息技术有限公司 | High-reliability coverage unit of public safety wireless network active distribution system |
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| CN201947264U (en) | 2011-08-24 |
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