CN205982426U - Building structure's frequency measurement system - Google Patents
Building structure's frequency measurement system Download PDFInfo
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- CN205982426U CN205982426U CN201620833007.6U CN201620833007U CN205982426U CN 205982426 U CN205982426 U CN 205982426U CN 201620833007 U CN201620833007 U CN 201620833007U CN 205982426 U CN205982426 U CN 205982426U
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Abstract
The utility model discloses a building structure's frequency measurement system, including main control unit, pump circuit, level control circuit, vibrating wire sensor, access detection circuitry, output signal modulate circuit and display. Main control unit is to pump circuit input PWM signal, it has inserted measurement system to detect vibrating wire sensor as access detection circuitry, main control unit sends control signal to level control circuit, the drive signal that level control circuit produced to vibrating wire sensor output drive circuit, vibrating wire sensor is generated frequency detected signal under drive signal's effect, and send the frequency detection signal to main control unit through the output signal modulate circuit, main control unit with the received data display on the display. The utility model discloses simple structure, precision height, low -cost generally are fit for current civilian and public building.
Description
Technical field
This utility model belongs to instrumentation techniques field, particularly to a kind of frequency measuring system of building structure.
Background technology
In recent years, house, bridge collapse accident occur repeatedly, and bring greatly to the person and property safety of the people
Threat.And during constructing with long span concrete bridge and become bridge operation in house, stress test is to evaluate its state
Important indicator.At present, the mostly sensor with diaphragm of strain gauge on the market, relies on American-European import mostly, expensive,
And detecting and controlling system is complicated, poor real, it is not appropriate for that China is civilian and utilities building.
Therefore, design the stress measurement system of a not only economic but also practical building structure, the safety for building is carried out
Risk assessment, becomes current problem demanding prompt solution.
Utility model content
In order to solve the technical problem that above-mentioned background technology proposes, this utility model aims to provide a kind of frequency of building structure
Rate measuring system, its structure is simple, high precision, low cost, is generally suitable for current civilian and utilities building.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is：
A kind of frequency measuring system of building structure, passes including master controller, exciting circuit, level control circuit, vibratory string
Sensor, detection circuit for access, output signal conditioning circuit and display, the input of described exciting circuit connects master controller,
The input of described level control circuit connects the outfan of exciting circuit, and the outfan of level control circuit connects vibratory string sensing
The incoming end of device, the control end of level control circuit connects master controller, and the input of described detection circuit for access connects vibratory string
The incoming end of sensor, the outfan of detection circuit for access connects master controller, the input of described output signal conditioning circuit
Connect the outfan of vibrating wire sensor, the outfan of output signal conditioning circuit connects master controller, and described display connects master
Controller；Master controller inputs pwm signal to exciting circuit, has accessed measurement when detection circuit for access detects vibrating wire sensor
System, master controller sends control signal to level control circuit, and level control circuit is to vibrating wire sensor output drive circuit
The pumping signal producing, vibrating wire sensor generates frequency detected signal in the presence of pumping signal, and by frequency detected signal
Send master controller through output signal conditioning circuit to, master controller is by the data display receiving over the display.
Based on the preferred version of technique scheme, described vibrating wire sensor includes an elastic shell, inside elastic shell
There is hollow region, in described hollow region, be provided with 1 string wire, 1 excitation coil, 1 receiving coil, excitation coil and reception line
The center of circle is equipped with Magnet, hollow region be respectively arranged at two ends with fastening chuck, for installing string wire；Described excitation coil
Receive pumping signal, so that string wire is vibrated in magnetic field, receiving coil receives the induced potential that string wire vibrates generation in magnetic field.
Based on the preferred version of technique scheme, described exciting circuit includes the first audion, the first inductance, the first electricity
Appearance, the first electrochemical capacitor, first resistor, the first diode and the second diode, the base stage of described first audion accesses master control
The pwm signal of device output processed, the base stage of the first audion is connected with supply voltage through first resistor, the emitter stage of the first audion
Ground connection, the colelctor electrode of the first audion is connected with supply voltage through the first inductance, and the two ends of the first electric capacity connect power supply electricity respectively
Pressure and ground wire, the minus earth of the first electrochemical capacitor, the negative electrode of positive pole connection first diode of the first electrochemical capacitor, the one or two
The anode of pole pipe connects the colelctor electrode of the first audion, the plus earth of the second diode, and the negative electrode of the second diode connects the
The colelctor electrode of one audion, the positive pole of the first electrochemical capacitor connects level control circuit.
Based on the preferred version of technique scheme, described level control circuit include the second audion, the 3rd audion,
3rd diode and the second～the 5th resistance, the base stage of described second audion is connected with master controller through second resistance, and second
The grounded emitter of audion, the colelctor electrode of the second audion is connected with the base stage of the 3rd audion through 3rd resistor, and the three or three
The base stage of pole pipe is connected with the emitter stage of the 3rd audion through the 4th resistance, and the negative electrode of the 3rd diode connects the 3rd audion
Colelctor electrode, the plus earth of the 3rd diode, the emitter stage of the 3rd audion is connected with exciting circuit through the 5th resistance, and the three or three
The colelctor electrode of pole pipe connects the incoming end of vibrating wire sensor.
Based on the preferred version of technique scheme, described detection circuit for access includes biserial switching diode, the first fortune
Put, the second～the 4th electric capacity and the 6th～the tenth resistance, described biserial switching diode includes the five or two pole of the 4th diode
Pipe, the anode of the 4th diode connects the negative electrode of the 5th diode respectively, and the negative electrode of the 4th diode connects supply voltage, and the 5th
The plus earth of diode, one end the 7th resistance of the 6th resistance is connected with supply voltage, and the other end of the 6th resistance is through
Two electric capacity are connected with ground wire, and one end of the 8th resistance is connected with the common port of the 6th resistance and the 7th resistance, the 8th resistance another
One end is grounded, and one end the 9th resistance of the 3rd electric capacity is connected with the common port of the 6th resistance and the 7th resistance, the 3rd electric capacity
The other end is grounded, and the positive input terminal of the first amplifier connects the 4th diode anode, and the negative input end of the first amplifier accesses benchmark electricity
Pressure, the outfan of the first amplifier connects negative input end, one end the tenth resistance of the 4th electric capacity and first amplifier of the first amplifier
Outfan be connected, the other end of the 4th electric capacity connects master controller.
Based on the preferred version of technique scheme, described master controller adopts STC12LE5A60S2 single-chip microcomputer.
The beneficial effect brought using technique scheme：
This utility model structure is simple, with low cost it is easy to produce, be widely used in currently civilian and utilities building.This
Utility model can read testing result in real time, easy to use directly perceived, suitable large-scale promotion application, and the safety for building is carried out
Risk assessment, reduces the life and property loss that architectural risks bring.
Brief description
Fig. 1 is the block diagram of system of the present utility model.
Fig. 2 is exciting circuit figure in this utility model.
Fig. 3 is level control circuit figure in this utility model.
Fig. 4 is detection circuit for access figure in this utility model.
Label declaration：R1～R10：First～the tenth resistance；C1～C4：First～the 4th electric capacity；D1～D5：The first～the
Five diodes；Q1～Q3：First～the 3rd audion；C：First electrochemical capacitor；L1：First inductance；U1：First amplifier.
Specific embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is described in detail.
As shown in figure 1, a kind of frequency measuring system of building structure, including master controller, exciting circuit, Automatic level control electricity
Road, vibrating wire sensor, detection circuit for access, output signal conditioning circuit and display.The input of described exciting circuit connects
Master controller, the input of described level control circuit connects the outfan of exciting circuit, and the outfan of level control circuit is even
Connect the incoming end of vibrating wire sensor, the control end of level control circuit connects master controller, the input of described detection circuit for access
End connects the incoming end of vibrating wire sensor, and the outfan of detection circuit for access connects master controller, described output signal conditioning electricity
The input on road connects the outfan of vibrating wire sensor, and the outfan of output signal conditioning circuit connects master controller, described aobvious
Show that device connects master controller.
In the present embodiment, vibrating wire sensor includes an elastic shell, has hollow region inside elastic shell, described hollow
It is provided with 1 string wire, 1 excitation coil, 1 receiving coil, the center of excitation coil and receiving coil is equipped with magnetic in region
Ferrum, hollow region be respectively arranged at two ends with fastening chuck, for installing string wire.
Vibrating wire sensor belongs to frequency type sensor, during use, vibrating wire sensor is embedded in building structure to be detected
In.The natural frequency of vibration of string wire is relevant with the size of its tensile force, after string wire physical dimension determines, the change of vibratory string frequency of vibration
Change amount, you can characterize the size of stress.Excitation coil receives pumping signal and produces magnetic field, and string wire vibrates in magnetic field, and string wire shakes
After dynamic in magnetic field cutting magnetic line, produced induced potential gathers and exported by receiving coil, the alternation frequency of induced potential
Rate is string wire frequency of vibration.
As shown in Fig. 2 in the present embodiment, exciting circuit includes the first audion Q1, the first inductance L1, the first electric capacity
C1, the first electrochemical capacitor C, first resistor R1, the first diode D1 and the second diode D2, the base stage of described first audion connects
Enter the pwm signal of master controller output, the base stage of the first audion is connected with supply voltage through first resistor, the first audion
Grounded emitter, the colelctor electrode of the first audion is connected with supply voltage through the first inductance, and the two ends of the first electric capacity connect respectively
Supply voltage and ground wire, the minus earth of the first electrochemical capacitor, the positive pole of the first electrochemical capacitor connects the negative electrode of the first diode,
The anode of the first diode connects the colelctor electrode of the first audion, the plus earth of the second diode, the negative electrode of the second diode
Connect the colelctor electrode of the first audion, the positive pole of the first electrochemical capacitor connects level control circuit.
As shown in figure 3, in the present embodiment, level control circuit include the second audion Q2, the 3rd audion Q3, the 3rd
Diode D3 and second～the 5th resistance R2～R5, the base stage of described second audion is connected with master controller through second resistance,
The grounded emitter of the second audion, the colelctor electrode of the second audion is connected with the base stage of the 3rd audion through 3rd resistor, the
The base stage of three audions is connected with the emitter stage of the 3rd audion through the 4th resistance, and the negative electrode of the 3rd diode connects the three or three pole
The colelctor electrode of pipe, the plus earth of the 3rd diode, the emitter stage of the 3rd audion is connected with exciting circuit through the 5th resistance, the
The colelctor electrode of three audions connects the incoming end of vibrating wire sensor.
As shown in figure 4, in the present embodiment, detection circuit for access include biserial switching diode, the first amplifier U1, second
～the four electric capacity C2～C4 and the 6th～the tenth resistance R6～R10, described biserial switching diode includes the 4th diode D4's
5th diode D5, the anode of the 4th diode connects the negative electrode of the 5th diode, and the negative electrode of the 4th diode connects power supply electricity
Pressure, the plus earth of the 5th diode, one end the 7th resistance of the 6th resistance is connected with supply voltage, the 6th resistance another
End is connected with ground wire through the second electric capacity, and one end of the 8th resistance is connected with the common port of the 6th resistance and the 7th resistance, the 8th electricity
The other end ground connection of resistance, one end the 9th resistance of the 3rd electric capacity is connected with the common port of the 6th resistance and the 7th resistance, and the 3rd
The other end ground connection of electric capacity, the positive input terminal of the first amplifier connects the 4th diode anode, and the negative input end of the first amplifier accesses
Reference voltage, the outfan of the first amplifier connects the negative input end of the first amplifier, one end the tenth resistance of the 4th electric capacity and the
The outfan of one amplifier is connected, and the other end of the 4th electric capacity connects master controller.
Master controller inputs pwm signal to exciting circuit, has accessed survey when detection circuit for access detects vibrating wire sensor
Amount system, master controller sends control signal to level control circuit, and level control circuit is to vibrating wire sensor output drive electricity
The pumping signal that road produces, vibrating wire sensor generates frequency detected signal in the presence of pumping signal, and frequency detecting is believed
Number it is amplified through output signal conditioning circuit, frequency-selecting sends master controller to after processing, master controller is by the data receiving
Display is over the display.According to building structure to be measured uniform changing load standard value and coefficient, calculate corresponding vibratory string frequency threshold
Value, when the frequency measured is more than the vibratory string frequency threshold calculating, shows that corresponding building structure is safe；When measure
Frequency is less than the vibratory string frequency threshold calculating, then show that corresponding building structure has exceeded its design load, have and greatly collapse
Risk.
Above example only illustrates technological thought of the present utility model it is impossible to limit protection model of the present utility model with this
Enclose, every according to the utility model proposes technological thought, any change done on the basis of technical scheme, each fall within this reality
Within the scope of novel protected.
Claims (6)
1. a kind of frequency measuring system of building structure it is characterised in that：Including master controller, exciting circuit, Automatic level control electricity
Road, vibrating wire sensor, detection circuit for access, output signal conditioning circuit and display, the input of described exciting circuit connects
Master controller, the input of described level control circuit connects the outfan of exciting circuit, and the outfan of level control circuit is even
Connect the incoming end of vibrating wire sensor, the control end of level control circuit connects master controller, the input of described detection circuit for access
End connects the incoming end of vibrating wire sensor, and the outfan of detection circuit for access connects master controller, described output signal conditioning electricity
The input on road connects the outfan of vibrating wire sensor, and the outfan of output signal conditioning circuit connects master controller, described aobvious
Show that device connects master controller；Master controller inputs pwm signal to exciting circuit, when detection circuit for access detects vibrating wire sensor
Access measuring system, master controller sends control signal to level control circuit, level control circuit is defeated to vibrating wire sensor
Go out the pumping signal of exciting circuit generation, vibrating wire sensor generates frequency detected signal in the presence of pumping signal, and will frequency
Rate detection signal sends master controller to through output signal conditioning circuit, and master controller is by the data display receiving in display
On.
2. according to claim 1 a kind of frequency measuring system of building structure it is characterised in that：Described vibrating wire sensor bag
Include an elastic shell, inside elastic shell, have hollow region, be provided with described hollow region 1 string wire, 1 excitation coil, 1
The center of receiving coil, excitation coil and receiving coil is equipped with Magnet, hollow region be respectively arranged at two ends with fastening chuck,
For installing string wire；Described excitation coil receives pumping signal, so that string wire is vibrated in magnetic field, and receiving coil receives string wire in magnetic
The induced potential of generation is vibrated in.
3. according to claim 1 a kind of frequency measuring system of building structure it is characterised in that：Described exciting circuit includes
First audion, the first inductance, the first electric capacity, the first electrochemical capacitor, first resistor, the first diode and the second diode, institute
The base stage stating the first audion accesses the pwm signal of master controller output, and the base stage of the first audion is through first resistor and power supply
Voltage is connected, the grounded emitter of the first audion, and the colelctor electrode of the first audion is connected with supply voltage through the first inductance, the
The two ends of one electric capacity connect supply voltage and ground wire, the minus earth of the first electrochemical capacitor, the positive pole of the first electrochemical capacitor respectively
Connect the negative electrode of the first diode, the anode of the first diode connects the colelctor electrode of the first audion, the anode of the second diode
Ground connection, the negative electrode of the second diode connects the colelctor electrode of the first audion, and the positive pole of the first electrochemical capacitor connects Automatic level control electricity
Road.
4. according to claim 1 a kind of frequency measuring system of building structure it is characterised in that：Described level control circuit
Including the second audion, the 3rd audion, the 3rd diode and the second～the 5th resistance, the base stage of described second audion is through
Two resistance are connected with master controller, the grounded emitter of the second audion, and the colelctor electrode of the second audion is through 3rd resistor and the
The base stage of three audions is connected, and the base stage of the 3rd audion is connected with the emitter stage of the 3rd audion through the 4th resistance, and the three or two
The negative electrode of pole pipe connects the colelctor electrode of the 3rd audion, the plus earth of the 3rd diode, and the emitter stage of the 3rd audion is through the
Five resistance are connected with exciting circuit, and the colelctor electrode of the 3rd audion connects the incoming end of vibrating wire sensor.
5. according to claim 1 a kind of frequency measuring system of building structure it is characterised in that：Described detection circuit for access
Including biserial switching diode, the first amplifier, the second～the 4th electric capacity and the 6th～the tenth resistance, described biserial switching diode
Including the 5th diode of the 4th diode, the anode of the 4th diode connects the negative electrode of the 5th diode, the four or two pole respectively
The negative electrode of pipe connects supply voltage, the plus earth of the 5th diode, one end the 7th resistance of the 6th resistance and supply voltage
It is connected, the other end of the 6th resistance is connected with ground wire through the second electric capacity, one end of the 8th resistance and the 6th resistance and the 7th resistance
Common port be connected, the other end of the 8th resistance ground connection, one end the 9th resistance of the 3rd electric capacity is electric with the 6th resistance and the 7th
The common port of resistance is connected, the other end ground connection of the 3rd electric capacity, positive input terminal connection the 4th diode anode of the first amplifier, and first
The negative input end of amplifier accesses reference voltage, and the outfan of the first amplifier connects the negative input end of the first amplifier, the 4th electric capacity
One end the tenth resistance is connected with the outfan of the first amplifier, and the other end of the 4th electric capacity connects master controller.
6. according to claim 1 a kind of frequency measuring system of building structure it is characterised in that：Described master controller adopts
STC12LE5A60S2 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620833007.6U CN205982426U (en) | 2016-08-03 | 2016-08-03 | Building structure's frequency measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620833007.6U CN205982426U (en) | 2016-08-03 | 2016-08-03 | Building structure's frequency measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982426U true CN205982426U (en) | 2017-02-22 |
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ID=58029707
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620833007.6U Expired - Fee Related CN205982426U (en) | 2016-08-03 | 2016-08-03 | Building structure's frequency measurement system |
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| CN (1) | CN205982426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057473A (en) * | 2019-04-30 | 2019-07-26 | 南京信息职业技术学院 | Excitation circuit of single-coil vibrating wire sensor and measuring circuit thereof |
-
2016
- 2016-08-03 CN CN201620833007.6U patent/CN205982426U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057473A (en) * | 2019-04-30 | 2019-07-26 | 南京信息职业技术学院 | Excitation circuit of single-coil vibrating wire sensor and measuring circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20170803 |
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| CF01 | Termination of patent right due to non-payment of annual fee |