Summary of the invention
The objective of the invention is to have the problem that instrument is heavy, installation is complicated, cost is high in order to solve existing pick-up unit and method, a kind of tunnel environment wireless sensing pick-up unit and method are provided.
Tunnel environment wireless sensing pick-up unit, it is comprised of N wireless sensing transmitting node and wireless messages collector node, and N is the integer greater than 2, the exchange data using wireless mode communication of described N wireless sensing transmitting node and wireless messages collector node; The wireless sensing transmitting node is comprised of sensor, a single-chip microcomputer processing unit, a power supply unit and a wireless communication unit, the output terminal of sensor signal is communicated with the input end of the transducing signal of a single-chip microcomputer processing unit, the power output end of a power supply unit is communicated with the input end of the power supply of a single-chip microcomputer processing unit, a data exchange end of a wireless communication unit is communicated with the exchanges data end that another exchanges data end of a wireless communication unit is the wireless sensing transmitting node with the communication data exchange end of a single-chip microcomputer processing unit; The wireless messages collector node is by No. two single-chip microcomputer processing units, indicative control unit, alarm unit, No. two power supply units and No. two wireless communication units consist of, the exchanges data end that a data exchange end of No. two wireless communication units is the wireless messages collector node, another exchanges data end of No. two wireless communication units is communicated with the communication data exchange end of No. two single-chip microcomputer processing units, the power output end of No. two power supply units is communicated with the input end of the power supply of No. two single-chip microcomputer processing units, the exchanges data end of indicative control unit is communicated with the demonstration of No. two single-chip microcomputer processing units control exchanges data end, and the output terminal that the warning of No. two single-chip microcomputer processing units starts control is communicated with the startup control input end of alarm unit.
Tunnel environment wireless sensing detection method, it comprises that concrete steps are as follows:
N wireless sensing transmitting node is mounted in respectively in the N place cement layer of tunnel vault, and the wireless messages collector node exposes or is buried in tunnel ground;
A single-chip microcomputer processing unit in step 1, the wireless sensing transmitting node begins frequency sweep to sensor with a fixed frequency pumping signal fL;
Step 2, judge sensor whether occur resonance: be that then execution in step four; No, then execution in step three;
Step 3, f
L+ Δ is judged f
L+ Δ<f
m, be that then execution in step two; No, then execution in step one; f
mBe the highest frequency sweep frequency, Δ is the step-length of sweep frequency;
Step 4, testing circuit pass to the single-chip microcomputer processing unit No. one with the signal that detects, the sensing data handling procedure of a single-chip microcomputer processing unit is processed described signal, be transferred to wireless communication unit No. one by the wireless transmission programmed control, send to the wireless messages collector node by electromagnetic wave;
Step 5, wireless messages collector node receive information to two single-chip microcomputer processing unit and process, show and judge; It is dangerous values that No. two single-chip microcomputer processing units are judged the tunnel environment parameter, then starts alarm unit and reports to the police.
The present invention detects the tunnel environment parameter and comprises strain, multi-point displacement and soil pressure parameter by N wireless sensing transmitting node being arranged in the N place cement layer of tunnel one section; When resonance appearred in detecting sensor, the wireless sensing transmitting node sent to the wireless messages collector node by electromagnetic wave with described signal, and the docking of wireless sensing information node is collected mail and ceased the information of processing, show and judge the tunnel environment parameter.The characteristics of wireless sensing pick-up unit comprise that volume is little, be convenient to install lay, cost is low and low-power consumption; Comprise that also construction threatens minimum, easy to use and safe and reliable.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 to Fig. 8, the described tunnel environment wireless sensing of present embodiment pick-up unit, it is comprised of N wireless sensing transmitting node 1 and wireless messages collector node 2, N is the integer greater than 2, the exchange data using wireless mode communication of described N wireless sensing transmitting node 1 and wireless messages collector node 2; Wireless sensing transmitting node 1 is by sensor 1-2, a single-chip microcomputer processing unit 1-1, a power supply unit 1-5 and a wireless communication unit 1-6 form, the output terminal of the signal of sensor 1-2 is communicated with the input end of the transducing signal of a single-chip microcomputer processing unit 1-1, the power output end of a power supply unit 1-5 is communicated with the input end of the power supply of a single-chip microcomputer processing unit 1-1, the data exchange end of a wireless communication unit 1-6 is communicated with the exchanges data end that another exchanges data end of a wireless communication unit 1-6 is wireless sensing transmitting node 1 with the communication data exchange end of a single-chip microcomputer processing unit 1-1; Wireless messages collector node 2 is by No. two single-chip microcomputer processing unit 2-1, indicative control unit 2-3, alarm unit 2-4, No. two power supply unit 2-5 and No. two wireless communication unit 2-6 consist of, the exchanges data end that the data exchange end of No. two wireless communication unit 2-6 is wireless messages collector node 2, another exchanges data end of No. two wireless communication unit 2-6 is communicated with the communication data exchange end of No. two single-chip microcomputer processing unit 2-1, the power output end of No. two power supply unit 2-5 is communicated with the input end of the power supply of No. two single-chip microcomputer processing unit 2-1, the exchanges data end of indicative control unit 2-3 is communicated with the demonstration control exchanges data end of No. two single-chip microcomputer processing unit 2-1, and the output terminal that the warning of No. two single-chip microcomputer processing unit 2-1 starts control is communicated with the startup control input end of alarm unit 2-4.
The schematic diagram of a single-chip microcomputer processing unit 1-1 as shown in Figure 4, the signal drive circuit of sensor 1-2 and testing circuit are as shown in Figure 5, the schematic diagram of a wireless communication unit 1-6 as shown in Figure 8, the power supply of a power supply unit 1-5 is provided by the 3.3V chargeable lithium cell;
The ultimate principle of No. two single-chip microcomputer processing unit 2-1 as shown in Figure 4, indicative control unit 2-3 principle as shown in Figure 6, alarm unit 2-4 principle as shown in Figure 7, the schematic diagram of No. two wireless communication unit 2-6 as shown in Figure 8, the power supply of No. two power supply unit 21-5 is provided by the 3.3V chargeable lithium cell.
The present invention detects the tunnel environment parameter by N wireless sensing transmitting node being arranged in the N place cement layer of tunnel vault; When monitoring physical quantity, the wireless sensing transmitting node sends to the wireless messages collector node by electromagnetic wave with described signal, the docking of wireless sensing information node is collected mail and is ceased the information of processing, show and judge the tunnel environment parameter, if surpass the tunnel safety value, namely send the early warning alarm.The characteristics of wireless sensing pick-up unit comprise that volume is little, be convenient to install lay, cost is low and low in energy consumption; Simultaneously work progress damage is little, easy to use and the sensor survival rate is high.
Embodiment two: present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, No. one single-chip microcomputer processing unit 1-1 comprises single-chip microcomputer, sensor driving and testing circuit and program software, sensor drives and the output terminal of testing circuit is communicated with the input end of sensor 1-2, sensor drives and the input end of testing circuit signal is communicated with the output terminal of the signal of sensor 1-2, sensor drives and the input end of testing circuit control signal is communicated with the sensing of single-chip microcomputer and the output terminal of detection control signal, described program software is by the frequency sweep program, the frequency measurement program, sensing data handling procedure and wireless transmission program form, and program software is solidificated in the storer of single-chip microcomputer.
Embodiment three: present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, No. two single-chip microcomputer processing unit 2-1 comprises single-chip microcomputer and program software, program software is solidificated in the storer of single-chip microcomputer, and described program software is comprised of sensing data handling procedure, wireless transmission program and display control program.
Embodiment four: present embodiment is described in conjunction with Fig. 2, present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, sensor 1-2 adopts the sensor of vibrating string joint meter, vibrating wire piezometer or type vibration wire soil pressure cell, finishes the monitoring of tunnel environment.
Vibrating string joint meter is comprised of the precision spring that vibrating string type sensor measuring unit and process heat treatment stress discharge, one end of spring is connected with the vibration string wire, and the other end is connected on the extension bar, when extension bar is subjected to displacement, changed the tension force of precision spring and string wire, correspondingly cause the change of the vibration frequency of string wire, this frequency signal arrives the single-chip microcomputer processing unit by cable transmission, the single-chip microcomputer processing unit can be processed out its frequency data, and frequency data are launched by wireless communication unit.
The vibration string wire of vibrating wire piezometer links to each other with a sensitive diaphragm, is located near the solenoid of string wire and can stirs string wire, the vibration string wire can be converted into electric weight again.The frequency of this electric weight can reflect its string wire natural reonant frequency.The variation of pressure causes the distortion of diaphragm, changes tension force and the resonant frequency thereof of string wire, and each pressure has a corresponding frequency output like this.
The type vibration wire soil pressure cell belongs to static, unidirectional, Boundary-Type power sensor.It adopts the thin board type structure, after the stressed deflection of its inner elastic sheet, by being mounted in two string wire posts on the thin plate, string wire stress is changed, and respective change also occurs the natural frequency of vibration of string.Utilize pulse excitation, make the string wire starting of oscillation, and receive its frequency.Can draw force value according to pressure-frequency relation curve.
The physical quantity of appealing three kinds of sensor impressions changes the resonant frequency that can change string wire, just can record tunnel environment information by the resonant frequency of measuring string wire.Its principle of work is as follows, the frequency sweep program of a single-chip microcomputer processing unit 1-1 curing drives with sensor by processor and is connected with the testing circuit input end, behind 2 triodes composition driving circuits, be connected to the driving input end of sensor 1-2, the frequency consistent with the string resonant frequency will produce larger vibration, then input detecting circuit, testing circuit is comprised of two-stage active filter and 1 amplifier.Its monitoring information is finished the string resonant frequency monitoring of shaking by being solidificated in sensor trace routine in the single-chip microcomputer in single-chip microcomputer processing unit 1-1 of input, sensor trace routine block diagram as shown in Figure 9.The resonance information of the vibration of string instrument that detects is launched by wireless communication unit 1-6 of wireless information machine transmitting node.
Embodiment five: present embodiment is described in conjunction with Fig. 3, present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, and the radio communication of wireless sensing transmitting node 1 and wireless messages collector node 2 adopts the frequency communication of 433MHz.
A wireless communication unit 1-6 and No. two wireless communication unit 2-6 are transmission and receptions of adopting radio frequency chip fulfillment information on the 433MHZ frequency.The information of a plurality of wireless sensing transmitting nodes is pooled on the wireless messages collector node, and described communication adopts wireless chip to communicate by letter at 433MHz, can see through 8 centimetres cement layer, realizes effective transmission of wireless sensing communication.But be not limited to the radio communication of 433MHz frequency, as long as can satisfy frequency that radio communication requires all at protection domain of the present invention.
Embodiment six: present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, and described alarm unit 2-4 adopts loudspeaker or hummer to realize.
Will be by loudspeaker or buzzer warning if the tunnel environment parameter is dangerous values.But alarm unit 2-4 is not limited to loudspeaker or hummer, as long as other devices that can satisfy alarm function are all at protection domain of the present invention.
Embodiment seven: present embodiment is the further restriction to embodiment one described tunnel environment wireless sensing pick-up unit, and a power supply unit 1-5 or No. two power supply unit 2-5 adopt battery to realize.
The staff can read the data of wireless messages collector node 2 at any time, and can allow wireless sensing transmitting node 1 and wireless messages collector node 2 be in the sleep electricity-saving state; When its work of needs, open again.A power supply unit 1-5 or No. two power supply unit 2-5 adopt the 3.3V chargeable lithium cell to provide.
Embodiment eight: the described tunnel environment wireless sensing of present embodiment detection method, it comprises that concrete steps are as follows:
N wireless sensing transmitting node 1 is mounted in respectively in the N place cement layer of tunnel vault, and wireless messages collector node 2 exposes or is buried in tunnel ground;
A single-chip microcomputer processing unit 1-1 in step 1, the wireless sensing transmitting node 1 begins frequency sweep to sensor 1-2 with a fixed frequency pumping signal fL;
Step 2, judge sensor 1-2 whether occur resonance: be that then execution in step four; No, then execution in step three;
Step 3, f
L+ Δ is judged f
L+ Δ<f
m, be that then execution in step two; No, then execution in step one; f
mBe the highest frequency sweep frequency, Δ is the step-length of sweep frequency;
Step 4, testing circuit pass to single-chip microcomputer processing unit 1-1 No. one with the signal that detects, the sensing data handling procedure of a single-chip microcomputer processing unit 1-1 is processed described signal, be transferred to wireless communication unit 1-6 No. one by the wireless transmission programmed control, send to wireless messages collector node 2 by electromagnetic wave;
Step 5, wireless messages collector node 2 reception information to two single-chip microcomputer processing unit 2-1 process, show and judge; It is dangerous values that No. two single-chip microcomputer processing unit 2-1 judge the tunnel environment parameter, then starts alarm unit 2-4 and reports to the police.
Embodiment nine: present embodiment is the further restriction to embodiment eight described tunnel environment wireless sensing detection methods, and wireless sensing transmitting node 1 is mounted in and is no more than in 8 centimetres of dark cement layers.
N wireless sensing transmitting node 1 is mounted in the cement layer on the top, tunnel as required, wireless sensing transmitting node 1 can dried up mud outer 8 centimetres dark; Wireless messages collector node 2 can expose or be buried in tunnel ground.A single-chip microcomputer processing unit 1-1 in the wireless sensing transmitting node 1 begins frequency sweep to sensor 1-2 with a fixed frequency pumping signal fL, when appearring in sensor 1-2, resonance effect then stops frequency sweep, by testing circuit the information that perceives is passed to single-chip microcomputer processing unit 1-1 core No. one, single-chip microcomputer processing unit 1-1 processes and transmits in the program of finishing according to internal system; Be transferred to a wireless communication unit 1-6 and send to wireless sensing information node 2 by electromagnetic wave.Wireless sensing information node 2 reception information to two single-chip microcomputer processing unit 2-1 process, show and judge.The information that any place, tunnel, which kind of tunnel environment parameter on the liquid crystal display of indicative control unit 2-3, will occur.Will be by loudspeaker or buzzer warning if the tunnel environment parameter is dangerous values.