CN204831644U - Steel shotcrete stress detecting system - Google Patents
Steel shotcrete stress detecting system Download PDFInfo
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- CN204831644U CN204831644U CN201520615796.1U CN201520615796U CN204831644U CN 204831644 U CN204831644 U CN 204831644U CN 201520615796 U CN201520615796 U CN 201520615796U CN 204831644 U CN204831644 U CN 204831644U
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Abstract
The utility model discloses a steel shotcrete stress detecting system, include a plurality of stress monitor cell that lay respectively in a plurality of steel shotcretes of monitoring and lay at the indoor master control equipment of monitoring that include microcontroller, voltage conversion circuit and the wireless transceiver who meets with microcontroller, a plurality of stress monitor cell all meet with microcontroller, every stress monitor cell all includes vibration wire formula axle power meter, picks up the circuit that shakes, drive circuit and relay protection circuit, and drive circuit's input termination has the optical coupling isolation circuit, picks up the circuit that shakes and includes preamplification circuit, bandwidth -limited circuit and the voltage comparater who connects gradually, and preamplification circuit, bandwidth -limited circuit, voltage comparater, drive circuit 1 and drive circuit 2 all meet with drive circuit 3, the utility model relates to a novelty can be gathered its "Frequency" and then know a plurality of steel shotcrete atress condition through driving each vibration wire formula axle power meter simultaneously, and control accuracy is high, and the practicality is strong.
Description
Technical field
The utility model belongs to frequency detecting technical field, is specifically related to a kind of bracing members stress mornitoring system.
Background technology
Bracing members is a kind of connecting elements playing support action, the Tu Bi in culvert tunnel is kept off in foundation ditch, prevent foundation ditch from collapsing, be widely used in building, tunnel, the construction works such as subway, need to accomplish effective monitoring to steel shotcrete support quality in work progress, avoid the generation of collapse accident, in prior art, the type vibration wire axle power measurement dimension that uses supports stressing conditions more, type vibration wire axle power meter is a kind of load measuring sensor, quantitative relation is had between its stressed and output frequency, can actual monitoring steel shotcrete support quality, to building, tunnel, the construction works such as subway play a very important role safely, the surge frequency range that existing type vibration wire axle power meter has it intrinsic, by the string wire of microcontroller excitation type vibration wire axle power meter, the frequency exported when microcontroller identically with the natural oscillation frequency of string wire will produce resonance, now pick-up circuit just can record the frequency of the string wire resonance of type vibration wire axle power meter, visible, the good and bad performance of pick-up circuit directly affects the acquisition precision of oscillation frequency, and existing pick-up control circui precision is low, filtering performance is poor, circuit structure is complicated, collection surge frequency range is wide, error is large, because the string wire output signal of type vibration wire axle power meter is very faint, need to amplify signal and process, in order to reduce the signal to noise ratio (S/N ratio) of amplifying, prime amplifier needs the extremely low end and makes an uproar, and the bandwidth-limited circuit being equipped with precision carries out screening oscillation frequency, in addition, existing bracing members stress mornitoring system many employings hyperchannel gating measures each bracing members stressing conditions, control complicated, anti-interference is poor, therefore, nowadays a kind of structure is lacked simple, reasonable in design, error is little, the bracing members stress mornitoring system of strong interference immunity, its frequency range is learnt by the handbook of type vibration wire axle power meter, microcontroller is used to export this frequency range, to reduce the loss to the string wire of type vibration wire axle power, high Fold signal amplification is carried out by pre-amplification circuit, fourth-order band-pass filtering circuit is adopted effectively to screen oscillation frequency, filtering performance is good, and drive each type vibration wire axle power meter to gather its oscillation frequency and then understand multiple bracing members stressing conditions simultaneously, wirelessly quick data transfering, efficiency is high.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of bracing members stress mornitoring system is provided, it is rationally novel in design, structure is simple, can by driving each type vibration wire axle power meter to gather its oscillation frequency and then understand multiple bracing members stressing conditions simultaneously, control accuracy is high, practical, is convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of bracing members stress mornitoring system, it is characterized in that: comprise multiple main control equipment being laid in the stress monitoring unit on monitored multiple bracing members respectively and being laid in monitoring indoor, the wireless transceiver that described main control equipment comprises microcontroller, voltage conversion circuit and connects with described microcontroller, multiple described stress monitoring unit all connects with microcontroller, each described stress monitoring unit includes type vibration wire axle power meter, the pick-up circuit connected with described type vibration wire axle power meter output terminal, and the driving circuit to connect with described type vibration wire axle power meter input end and relay protection circuit, the input end of described driving circuit is connected to optical coupling isolation circuit, described pick-up circuit comprises the pre-amplification circuit connected successively, bandwidth-limited circuit and voltage comparator, the input end of described pre-amplification circuit connects with described type vibration wire axle power meter output terminal, the output terminal of described voltage comparator connects with the input end of described microcontroller, the input end of described optical coupling isolation circuit and the input end of relay protection circuit all connect with the output terminal of described microcontroller, described pre-amplification circuit, bandwidth-limited circuit, voltage comparator, microcontroller and wireless transceiver all connect with described voltage conversion circuit,
Described optical coupling isolation circuit comprises chip TLP250, described driving circuit comprises chip TPS2812 and connectivity port Port1,2nd pin of described chip TLP250 connects with microcontroller, 3rd pin of chip TLP250 is through resistance R10 ground connection, 8th pin of chip TLP250 divides two-way, one tunnel connects with+12V voltage output end, and another road is through electric capacity C4 ground connection; The 5th pin ground connection of chip TLP250,6th pin of chip TLP250 and the 7th pin all connect with the 2nd pin of chip TPS2812, the 3rd pin ground connection of chip TPS2812,6th pin of chip TPS2812 divides two-way, one tunnel connects with+12V voltage output end, and another road is through the electric capacity C13 of parallel connection and electric capacity C13 ground connection; 7th pin of chip TPS2812 connects with connectivity port Port1.
Above-mentioned a kind of bracing members stress mornitoring system, is characterized in that: described voltage conversion circuit comprises and+12V direct current is converted to galvanic first voltage conversion circuit of+5V ,+12V direct current is converted to galvanic second voltage conversion circuit of-5V and connects with described first voltage conversion circuit and be used for+5V direct current being converted to the galvanic tertiary voltage change-over circuit of+3.3V;
Described first voltage conversion circuit comprises the chip U4 that model is MC34063,6th pin of chip U4, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U4 divides two-way, one tunnel connects with the negative electrode of diode D1, and another road connects with one end of inductance L 1; The plus earth of diode D1, the other end of inductance L 1 is+5V voltage output end;
Described second voltage conversion circuit comprises the chip U5 that model is MC34063,6th pin of chip U5, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U5 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through inductance L 2 ground connection; The anode of diode D1 is-5V voltage output end;
Described tertiary voltage change-over circuit comprises chip REG1117-3.3, and the IN pin of chip REG1117-3.3 connects with+5V the voltage output end of described first voltage conversion circuit, and the OUT pin of chip REG1117-3.3 is+3.3V voltage output end.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: described relay protection circuit comprises relay G6S-2, 8th pin of relay G6S-2 and the collector of triode Q1, the collector of triode Q2, the link of the anode of diode D3 and the negative electrode of light emitting diode D4 connects, the base stage of triode Q2 connects with the emitter of triode Q1, the grounded emitter of triode Q2, the base stage of triode Q1 connects with microcontroller, the negative electrode of diode D3 connects with the 1st pin of relay G6S-2, the anode of light emitting diode D4 connects with the 1st pin of relay G6S-2 through resistance R26, 1st pin of relay G6S-2 connects with+5V the voltage output end of the first voltage conversion circuit, the 3rd pin ground connection of relay G6S-2, 6th pin of relay G6S-2 connects with connectivity port Port1.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: described pre-amplification circuit comprises amplifier AD623, the reverse inter-input-ing ending grounding of described amplifier AD623, the in-phase input end of amplifier AD623 connects with connectivity port Port1, 1st pin of amplifier AD623 connects a stiff end of swept resistance R3, another stiff end of swept resistance R3 and the sliding end of swept resistance R3 all connect with the 8th pin of amplifier AD623, 7th pin of amplifier AD623 connects with+5V the voltage output end of the first voltage conversion circuit, 4th pin of amplifier AD623 connects with-5V the voltage output end of the second voltage conversion circuit.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: described bandwidth-limited circuit comprises amplifier U1 that model is OP-16 and model is the amplifier U2 of OP-16, the inverting input of described amplifier U1 is through resistance R19 ground connection, the in-phase input end of amplifier U1 connects with the output terminal of amplifier AD623 through electric capacity C21 and resistance R21, the link of electric capacity C21 and resistance R21 is through electric capacity C23 ground connection, the in-phase input end of amplifier U1 and the link of electric capacity C21 are through resistance R23 ground connection, the output terminal of amplifier U1 divides two-way, one tunnel connects with the inverting input of amplifier U1 through resistance R17, another road connects with the link of electric capacity C21 and resistance R21 through resistance R25, the inverting input of described amplifier U2 is through resistance R18 ground connection, the in-phase input end of amplifier U2 connects with the output terminal of amplifier U1 through electric capacity C20 and resistance R20, the link of electric capacity C20 and resistance R20 is through electric capacity C22 ground connection, the in-phase input end of amplifier U2 and the link of electric capacity C20 are through resistance R22 ground connection, the output terminal of amplifier U2 divides two-way, one tunnel connects with the inverting input of amplifier U2 through resistance R16, and another road connects with the link of electric capacity C20 and resistance R20 through resistance R24.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: described voltage comparator comprises the amplifier U3 and amplifier LM311 that model is OP-16, the inverting input of described amplifier U3 is through resistance R7 ground connection, the in-phase input end of amplifier U3 connects with the output terminal of amplifier U2, the output terminal of amplifier U3 connects with the inverting input of amplifier U3 through resistance R2, the in-phase input end of described amplifier LM311 connects with the output terminal of amplifier U3, the reverse inter-input-ing ending grounding of amplifier LM311, 4th pin of amplifier LM311 connects with-5V the voltage output end of the second voltage conversion circuit, 8th pin of amplifier LM311 connects with+5V the voltage output end of the first voltage conversion circuit, 5th pin of amplifier LM311 connects with the 6th pin of amplifier LM311, 7th pin of amplifier LM311 divides two-way, one tunnel connects with+5V the voltage output end of the first voltage conversion circuit through resistance R4, another road connects with one end of resistance R8, the other end of resistance R8 divides two-way, and a road connects with+5V the voltage output end of the first voltage conversion circuit through resistance R5, and another road is through resistance R11 and resistance R14 ground connection, and the link of resistance R11 and resistance R14 connects with microcontroller.
Above-mentioned a kind of bracing members stress mornitoring system, is characterized in that: described type vibration wire axle power meter comprises type vibration wire load measuring sensor WD.24-50.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: described wireless transceiver comprises chip nRF905, the VDD pin of described chip nRF905 connects with+3.3V the voltage output end of tertiary voltage change-over circuit, 1st pin of chip nRF905, the 3rd pin, the 10th pin, the 11st pin, the 12nd pin and the 32nd pin all connect with microcontroller, 20th pin of chip nRF905 is through inductance L 5 and electric capacity C34 ground connection, and the 21st pin of chip nRF905 connects through inductance L 3 one end with electric capacity C30.
Above-mentioned a kind of bracing members stress mornitoring system, it is characterized in that: also comprise antenna, described antenna is connected with the other end of electric capacity C30.
Above-mentioned a kind of bracing members stress mornitoring system, is characterized in that: described microcontroller comprises ARM microcontroller or single-chip microcomputer.
The utility model compared with prior art has the following advantages:
1, the utility model is by arranging multiple stress monitoring unit, drives each type vibration wire axle power meter gather oscillation frequency and then understand multiple bracing members stressing conditions simultaneously, and wirelessly data transmission, service efficiency is high.
2, the utility model is changed multiple voltage meet pick-up circuit, microcontroller and wireless transceiver power demands by being arranged voltage conversion circuit, and reliable and stable, result of use is good.
3, the pre-amplification circuit in the utility model pick-up circuit amplifies feeble signal and processes, and adopt precision instrument amplifier AD623, control accuracy is high, and signal amplification factor is high, and carry out enlargement factor change by regulating circuit loop resistance, dirigibility is high; Bandwidth-limited circuit in pick-up circuit screens effective oscillation frequency, and the fourth-order band-pass filtering circuit adopting two-stage Two-orders mode to form, guarantees the reservation of useful signal, gathers resonance frequency range accurate, practical.
4, the utility model is rationally novel in design, and volume is little, and remove and install convenient, flexible, fast response time, precision is high, practical, is convenient to promote the use of.
In sum, the utility model is rationally novel in design, and structure is simple, and can gather oscillation frequency by driving each type vibration wire axle power meter simultaneously and then understand multiple bracing members stressing conditions, control accuracy be high, practical, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit connecting relation schematic diagram of the utility model optical coupling isolation circuit and driving circuit.
Fig. 3 is the circuit theory diagrams of the utility model relay protection circuit.
Fig. 4 is the circuit connecting relation schematic diagram of the utility model first voltage conversion circuit and the second voltage conversion circuit.
Fig. 5 is the circuit theory diagrams of the utility model tertiary voltage change-over circuit.
Fig. 6 is the circuit connecting relation schematic diagram of the utility model pre-amplification circuit.
Fig. 7 is the circuit theory diagrams of the utility model bandwidth-limited circuit.
Fig. 8 is the circuit theory diagrams of the utility model voltage comparator.
Fig. 9 is the circuit theory diagrams of the utility model wireless transceiver.
Description of reference numerals:
1-microcontroller; 2-wireless transceiver; 3-voltage conversion circuit;
4-stress monitoring unit; 4-1-optical coupling isolation circuit; 4-2-driving circuit;
4-3-type vibration wire axle power meter; 4-4-relay protection circuit; 4-5-pre-amplification circuit;
4-6-bandwidth-limited circuit; 4-7-voltage comparator.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises multiple main control equipment being laid in the stress monitoring unit 4 on monitored multiple bracing members respectively and being laid in monitoring indoor, the wireless transceiver 2 that described main control equipment comprises microcontroller 1, voltage conversion circuit 3 and connects with described microcontroller 1, multiple described stress monitoring unit 4 all connects with microcontroller 1, each described stress monitoring unit 4 includes type vibration wire axle power meter 4-3, the pick-up circuit connected with described type vibration wire axle power meter 4-3 output terminal, and the driving circuit 4-2 to connect with described type vibration wire axle power meter 4-3 input end and relay protection circuit 4-4, the input end of described driving circuit 4-2 is connected to optical coupling isolation circuit 4-1, described pick-up circuit comprises the pre-amplification circuit 4-5 connected successively, bandwidth-limited circuit 4-6 and voltage comparator 4-7, the input end of described pre-amplification circuit 4-5 connects with described type vibration wire axle power meter 4-3 output terminal, the output terminal of described voltage comparator 4-7 connects with the input end of described microcontroller 1, the input end of described optical coupling isolation circuit 4-1 and the input end of relay protection circuit 4-4 all connect with the output terminal of described microcontroller 1, described pre-amplification circuit 4-5, bandwidth-limited circuit 4-6, voltage comparator 4-7, microcontroller 1 and wireless transceiver 2 all connect with described voltage conversion circuit 3.
Described optical coupling isolation circuit 4-1 comprises chip TLP250, described driving circuit 4-2 comprises chip TPS2812 and connectivity port Port1,2nd pin of described chip TLP250 connects with microcontroller 1,3rd pin of chip TLP250 is through resistance R10 ground connection, 8th pin of chip TLP250 divides two-way, one tunnel connects with+12V voltage output end, and another road is through electric capacity C4 ground connection; The 5th pin ground connection of chip TLP250,6th pin of chip TLP250 and the 7th pin all connect with the 2nd pin of chip TPS2812, the 3rd pin ground connection of chip TPS2812,6th pin of chip TPS2812 divides two-way, one tunnel connects with+12V voltage output end, and another road is through the electric capacity C13 of parallel connection and electric capacity C13 ground connection; 7th pin of chip TPS2812 connects with connectivity port Port1.
In actual use, connectivity port Port1 connects the signal end of type vibration wire axle power meter 4-3, string wire vibration in excitation type vibration wire axle power meter 4-3.
As shown in Figure 4 and Figure 5, in the present embodiment, described voltage conversion circuit 3 comprises and+12V direct current is converted to galvanic first voltage conversion circuit of+5V ,+12V direct current is converted to galvanic second voltage conversion circuit of-5V and connects with described first voltage conversion circuit and be used for+5V direct current being converted to the galvanic tertiary voltage change-over circuit of+3.3V.
Described first voltage conversion circuit comprises the chip U4 that model is MC34063,6th pin of chip U4, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U4 divides two-way, one tunnel connects with the negative electrode of diode D1, and another road connects with one end of inductance L 1; The plus earth of diode D1, the other end of inductance L 1 is+5V voltage output end.
Described second voltage conversion circuit comprises the chip U5 that model is MC34063,6th pin of chip U5, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U5 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through inductance L 2 ground connection; The anode of diode D1 is-5V voltage output end.
Described tertiary voltage change-over circuit comprises chip REG1117-3.3, and the IN pin of chip REG1117-3.3 connects with+5V the voltage output end of described first voltage conversion circuit, and the OUT pin of chip REG1117-3.3 is+3.3V voltage output end.
As shown in Figure 3, in the present embodiment, described relay protection circuit 4-4 comprises relay G6S-2, 8th pin of relay G6S-2 and the collector of triode Q1, the collector of triode Q2, the link of the anode of diode D3 and the negative electrode of light emitting diode D4 connects, the base stage of triode Q2 connects with the emitter of triode Q1, the grounded emitter of triode Q2, the base stage of triode Q1 connects with microcontroller 1, the negative electrode of diode D3 connects with the 1st pin of relay G6S-2, the anode of light emitting diode D4 connects with the 1st pin of relay G6S-2 through resistance R26, 1st pin of relay G6S-2 connects with+5V the voltage output end of the first voltage conversion circuit, the 3rd pin ground connection of relay G6S-2, 6th pin of relay G6S-2 connects with connectivity port Port1.
In actual use, connectivity port Port1 connects the signal end of type vibration wire axle power meter 4-3, string wire vibration in this type vibration wire axle power meter of gating 4-3.
As shown in Figure 6, in the present embodiment, described pre-amplification circuit 4-5 comprises amplifier AD623, the reverse inter-input-ing ending grounding of described amplifier AD623, the in-phase input end of amplifier AD623 connects with connectivity port Port1, 1st pin of amplifier AD623 connects a stiff end of swept resistance R3, another stiff end of swept resistance R3 and the sliding end of swept resistance R3 all connect with the 8th pin of amplifier AD623, 7th pin of amplifier AD623 connects with+5V the voltage output end of the first voltage conversion circuit, 4th pin of amplifier AD623 connects with-5V the voltage output end of the second voltage conversion circuit.
In actual use, connectivity port Port1 connects the signal end of type vibration wire axle power meter 4-3, gathers the oscillation frequency of string wire in type vibration wire axle power meter 4-3.
As shown in Figure 7, in the present embodiment, described bandwidth-limited circuit 4-6 comprises amplifier U1 that model is OP-16 and model is the amplifier U2 of OP-16, the inverting input of described amplifier U1 is through resistance R19 ground connection, the in-phase input end of amplifier U1 connects with the output terminal of amplifier AD623 through electric capacity C21 and resistance R21, the link of electric capacity C21 and resistance R21 is through electric capacity C23 ground connection, the in-phase input end of amplifier U1 and the link of electric capacity C21 are through resistance R23 ground connection, the output terminal of amplifier U1 divides two-way, one tunnel connects with the inverting input of amplifier U1 through resistance R17, another road connects with the link of electric capacity C21 and resistance R21 through resistance R25, the inverting input of described amplifier U2 is through resistance R18 ground connection, the in-phase input end of amplifier U2 connects with the output terminal of amplifier U1 through electric capacity C20 and resistance R20, the link of electric capacity C20 and resistance R20 is through electric capacity C22 ground connection, the in-phase input end of amplifier U2 and the link of electric capacity C20 are through resistance R22 ground connection, the output terminal of amplifier U2 divides two-way, one tunnel connects with the inverting input of amplifier U2 through resistance R16, and another road connects with the link of electric capacity C20 and resistance R20 through resistance R24.
As shown in Figure 8, in the present embodiment, described voltage comparator 4-7 comprises the amplifier U3 and amplifier LM311 that model is OP-16, the inverting input of described amplifier U3 is through resistance R7 ground connection, the in-phase input end of amplifier U3 connects with the output terminal of amplifier U2, the output terminal of amplifier U3 connects with the inverting input of amplifier U3 through resistance R2, the in-phase input end of described amplifier LM311 connects with the output terminal of amplifier U3, the reverse inter-input-ing ending grounding of amplifier LM311, 4th pin of amplifier LM311 connects with-5V the voltage output end of the second voltage conversion circuit, 8th pin of amplifier LM311 connects with+5V the voltage output end of the first voltage conversion circuit, 5th pin of amplifier LM311 connects with the 6th pin of amplifier LM311, 7th pin of amplifier LM311 divides two-way, one tunnel connects with+5V the voltage output end of the first voltage conversion circuit through resistance R4, another road connects with one end of resistance R8, the other end of resistance R8 divides two-way, and a road connects with+5V the voltage output end of the first voltage conversion circuit through resistance R5, and another road is through resistance R11 and resistance R14 ground connection, and the link of resistance R11 and resistance R14 connects with microcontroller 1.
In the present embodiment, described type vibration wire axle power meter 4-3 comprises type vibration wire load measuring sensor WD.24-50.
As shown in Figure 9, in the present embodiment, described wireless transceiver 2 comprises chip nRF905, the VDD pin of described chip nRF905 connects with+3.3V the voltage output end of tertiary voltage change-over circuit, 1st pin of chip nRF905, the 3rd pin, the 10th pin, the 11st pin, the 12nd pin and the 32nd pin all connect with microcontroller 1,20th pin of chip nRF905 is through inductance L 5 and electric capacity C34 ground connection, and the 21st pin of chip nRF905 connects through inductance L 3 one end with electric capacity C30.
In the present embodiment, also comprise antenna, described antenna is connected with the other end of electric capacity C30.
In the present embodiment, described microcontroller 1 comprises ARM microcontroller or single-chip microcomputer.
When the utility model uses, voltage conversion circuit 3 changes the dual power supply demand that multiple voltage meets pre-amplification circuit 4-5, bandwidth-limited circuit 4-6 and voltage comparator 4-7, and the low voltage power supply demand of microcontroller 1 and wireless transceiver 2, multiple stress monitoring unit 4 is arranged on respectively each steel shotcrete support quality of Real-time Collection on each bracing members, type vibration wire axle power meter 4-3 work gating is controlled by relay protection circuit 4-4, the natural frequency scope of type vibration wire axle power meter 4-3 is learnt by the handbook of type vibration wire axle power meter 4-3, microcontroller 1 is used to export this frequency range, microcontroller 1 sends pumping signal and avoids microcontroller 1 to be broken down by high-voltage by optical coupling isolation circuit 4-1 protection circuit work safety, signal drives the string wire vibration in type vibration wire axle power meter 4-3 through overdrive circuit 4-2, faint type vibration wire axle power meter 4-3 oscillation frequency signal is gathered by pre-amplification circuit 4-5, and carry out the amplification of high power number signal, signal after amplification is sent in the bandwidth-limited circuit 4-6 of two-stage Two-orders, oscillation frequency is effectively screened, the signal screened is sent in voltage comparator 4-7 and again amplifies rear voltage compare feeding microcontroller 1, the signal of collection is monitored in indoor host computer by real-time the sending it back of wireless transceiver 2 by microcontroller 1, because type vibration wire axle power meter oscillation frequency signal and its stress have quantitative relation, its stressing conditions can be learnt according to gathering the frequency signal of returning, and multiple bracing members using state can be detected simultaneously, strong interference immunity, result of use is good.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. a bracing members stress mornitoring system, it is characterized in that: comprise multiple main control equipment being laid in the stress monitoring unit (4) on monitored multiple bracing members respectively and being laid in monitoring indoor, the wireless transceiver (2) that described main control equipment comprises microcontroller (1), voltage conversion circuit (3) and connects with described microcontroller (1), multiple described stress monitoring unit (4) all connects with microcontroller (1), each described stress monitoring unit (4) includes type vibration wire axle power meter (4-3), the pick-up circuit connected with described type vibration wire axle power meter (4-3) output terminal, and the driving circuit (4-2) to connect with described type vibration wire axle power meter (4-3) input end and relay protection circuit (4-4), the input end of described driving circuit (4-2) is connected to optical coupling isolation circuit (4-1), described pick-up circuit comprises the pre-amplification circuit (4-5) connected successively, bandwidth-limited circuit (4-6) and voltage comparator (4-7), the input end of described pre-amplification circuit (4-5) connects with described type vibration wire axle power meter (4-3) output terminal, the output terminal of described voltage comparator (4-7) connects with the input end of described microcontroller (1), the input end of described optical coupling isolation circuit (4-1) and the input end of relay protection circuit (4-4) all connect with the output terminal of described microcontroller (1), described pre-amplification circuit (4-5), bandwidth-limited circuit (4-6), voltage comparator (4-7), microcontroller (1) and wireless transceiver (2) all connect with described voltage conversion circuit (3),
Described optical coupling isolation circuit (4-1) comprises chip TLP250, described driving circuit (4-2) comprises chip TPS2812 and connectivity port Port1,2nd pin of described chip TLP250 connects with microcontroller (1), 3rd pin of chip TLP250 is through resistance R10 ground connection, 8th pin of chip TLP250 divides two-way, one tunnel connects with+12V voltage output end, and another road is through electric capacity C4 ground connection; The 5th pin ground connection of chip TLP250,6th pin of chip TLP250 and the 7th pin all connect with the 2nd pin of chip TPS2812, the 3rd pin ground connection of chip TPS2812,6th pin of chip TPS2812 divides two-way, one tunnel connects with+12V voltage output end, and another road is through the electric capacity C13 of parallel connection and electric capacity C13 ground connection; 7th pin of chip TPS2812 connects with connectivity port Port1.
2. according to a kind of bracing members stress mornitoring system according to claim 1, it is characterized in that: described voltage conversion circuit (3) comprises and+12V direct current is converted to galvanic first voltage conversion circuit of+5V ,+12V direct current is converted to galvanic second voltage conversion circuit of-5V and connects with described first voltage conversion circuit and be used for+5V direct current being converted to the galvanic tertiary voltage change-over circuit of+3.3V;
Described first voltage conversion circuit comprises the chip U4 that model is MC34063,6th pin of chip U4, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U4 divides two-way, one tunnel connects with the negative electrode of diode D1, and another road connects with one end of inductance L 1; The plus earth of diode D1, the other end of inductance L 1 is+5V voltage output end;
Described second voltage conversion circuit comprises the chip U5 that model is MC34063,6th pin of chip U5, the 7th pin, the 8th pin and the 1st pin all connect with+12V voltage output end, 2nd pin of chip U5 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through inductance L 2 ground connection; The anode of diode D1 is-5V voltage output end;
Described tertiary voltage change-over circuit comprises chip REG1117-3.3, and the IN pin of chip REG1117-3.3 connects with+5V the voltage output end of described first voltage conversion circuit, and the OUT pin of chip REG1117-3.3 is+3.3V voltage output end.
3. according to a kind of bracing members stress mornitoring system according to claim 2, it is characterized in that: described relay protection circuit (4-4) comprises relay G6S-2, 8th pin of relay G6S-2 and the collector of triode Q1, the collector of triode Q2, the link of the anode of diode D3 and the negative electrode of light emitting diode D4 connects, the base stage of triode Q2 connects with the emitter of triode Q1, the grounded emitter of triode Q2, the base stage of triode Q1 connects with microcontroller (1), the negative electrode of diode D3 connects with the 1st pin of relay G6S-2, the anode of light emitting diode D4 connects with the 1st pin of relay G6S-2 through resistance R26, 1st pin of relay G6S-2 connects with+5V the voltage output end of the first voltage conversion circuit, the 3rd pin ground connection of relay G6S-2, 6th pin of relay G6S-2 connects with connectivity port Port1.
4. according to a kind of bracing members stress mornitoring system according to claim 2, it is characterized in that: described pre-amplification circuit (4-5) comprises amplifier AD623, the reverse inter-input-ing ending grounding of described amplifier AD623, the in-phase input end of amplifier AD623 connects with connectivity port Port1, 1st pin of amplifier AD623 connects a stiff end of swept resistance R3, another stiff end of swept resistance R3 and the sliding end of swept resistance R3 all connect with the 8th pin of amplifier AD623, 7th pin of amplifier AD623 connects with+5V the voltage output end of the first voltage conversion circuit, 4th pin of amplifier AD623 connects with-5V the voltage output end of the second voltage conversion circuit.
5. according to a kind of bracing members stress mornitoring system according to claim 4, it is characterized in that: described bandwidth-limited circuit (4-6) comprises amplifier U1 that model is OP-16 and model is the amplifier U2 of OP-16, the inverting input of described amplifier U1 is through resistance R19 ground connection, the in-phase input end of amplifier U1 connects with the output terminal of amplifier AD623 through electric capacity C21 and resistance R21, the link of electric capacity C21 and resistance R21 is through electric capacity C23 ground connection, the in-phase input end of amplifier U1 and the link of electric capacity C21 are through resistance R23 ground connection, the output terminal of amplifier U1 divides two-way, one tunnel connects with the inverting input of amplifier U1 through resistance R17, another road connects with the link of electric capacity C21 and resistance R21 through resistance R25, the inverting input of described amplifier U2 is through resistance R18 ground connection, the in-phase input end of amplifier U2 connects with the output terminal of amplifier U1 through electric capacity C20 and resistance R20, the link of electric capacity C20 and resistance R20 is through electric capacity C22 ground connection, the in-phase input end of amplifier U2 and the link of electric capacity C20 are through resistance R22 ground connection, the output terminal of amplifier U2 divides two-way, one tunnel connects with the inverting input of amplifier U2 through resistance R16, and another road connects with the link of electric capacity C20 and resistance R20 through resistance R24.
6. according to a kind of bracing members stress mornitoring system according to claim 5, it is characterized in that: described voltage comparator (4-7) comprises the amplifier U3 and amplifier LM311 that model is OP-16, the inverting input of described amplifier U3 is through resistance R7 ground connection, the in-phase input end of amplifier U3 connects with the output terminal of amplifier U2, the output terminal of amplifier U3 connects with the inverting input of amplifier U3 through resistance R2, the in-phase input end of described amplifier LM311 connects with the output terminal of amplifier U3, the reverse inter-input-ing ending grounding of amplifier LM311, 4th pin of amplifier LM311 connects with-5V the voltage output end of the second voltage conversion circuit, 8th pin of amplifier LM311 connects with+5V the voltage output end of the first voltage conversion circuit, 5th pin of amplifier LM311 connects with the 6th pin of amplifier LM311, 7th pin of amplifier LM311 divides two-way, one tunnel connects with+5V the voltage output end of the first voltage conversion circuit through resistance R4, another road connects with one end of resistance R8, the other end of resistance R8 divides two-way, and a road connects with+5V the voltage output end of the first voltage conversion circuit through resistance R5, and another road is through resistance R11 and resistance R14 ground connection, and the link of resistance R11 and resistance R14 connects with microcontroller (1).
7. according to a kind of bracing members stress mornitoring system according to claim 1, it is characterized in that: described type vibration wire axle power meter (4-3) comprises type vibration wire load measuring sensor WD.24-50.
8. according to a kind of bracing members stress mornitoring system according to claim 1, it is characterized in that: described wireless transceiver (2) comprises chip nRF905, the VDD pin of described chip nRF905 connects with+3.3V the voltage output end of tertiary voltage change-over circuit, 1st pin of chip nRF905, the 3rd pin, the 10th pin, the 11st pin, the 12nd pin and the 32nd pin all connect with microcontroller (1), 20th pin of chip nRF905 is through inductance L 5 and electric capacity C34 ground connection, and the 21st pin of chip nRF905 connects through inductance L 3 one end with electric capacity C30.
9., according to a kind of bracing members stress mornitoring system according to claim 8, it is characterized in that: also comprise antenna, described antenna is connected with the other end of electric capacity C30.
10., according to a kind of bracing members stress mornitoring system according to claim 1, it is characterized in that: described microcontroller (1) comprises ARM microcontroller or single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520615796.1U CN204831644U (en) | 2015-08-14 | 2015-08-14 | Steel shotcrete stress detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520615796.1U CN204831644U (en) | 2015-08-14 | 2015-08-14 | Steel shotcrete stress detecting system |
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|---|---|
| CN204831644U true CN204831644U (en) | 2015-12-02 |
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| CN201520615796.1U Expired - Fee Related CN204831644U (en) | 2015-08-14 | 2015-08-14 | Steel shotcrete stress detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452203A (en) * | 2022-11-08 | 2022-12-09 | 常州金土木工程仪器有限公司 | Dynamic measuring circuit of vibrating wire sensor |
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- 2015-08-14 CN CN201520615796.1U patent/CN204831644U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452203A (en) * | 2022-11-08 | 2022-12-09 | 常州金土木工程仪器有限公司 | Dynamic measuring circuit of vibrating wire sensor |
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