CN110220630A - A kind of portable bridge cable force detecting device - Google Patents
A kind of portable bridge cable force detecting device Download PDFInfo
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- CN110220630A CN110220630A CN201910602581.9A CN201910602581A CN110220630A CN 110220630 A CN110220630 A CN 110220630A CN 201910602581 A CN201910602581 A CN 201910602581A CN 110220630 A CN110220630 A CN 110220630A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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Abstract
The invention discloses a kind of portable bridge cable force detecting devices, including JSL100-1 Suo Li acceleration transducer, analog signal conditioner device, modulus signal converter, data latches, master cpu controller, USB interface and power conversion module.The present invention is according to the actual conditions of engineering structure Suo Li on-the-spot test, directly Suo Li structural vibration fundamental frequency is directly extracted by CPU powerful data calculation processing function, it is quickly obtained bridge cable force, real-time judge Suo Li situation, bridge cable situation can be judged quickly, it is ensured that bridge operational safety is of crucial importance.The present invention directly provides power supply using+5 power supplys that notebook computer USB interface provides for device, does not need additional power source, more increases the portability of device.The present invention can be that other civil infrastructure health monitorings and the monomer structure having a large capacity and a wide range carry out health Evaluation by changing algorithm.
Description
Technical field
The present invention relates to bridge cable force detection technique, in particular to a kind of portable bridge cable force detecting device.
Background technique
In modern Longspan Bridge, cable-stayed bridge is a kind of important bridge type.Suspension cable is as main in Cable-Stayed Bridge Structure
Load-carrying member plays a crucial role the safe operation of bridge, thus also seems especially heavy to the test of cord force of cable-stayed bridge
It wants.A variety of methods, such as magnetic flux method, pressure application, fundamental frequency method etc. are developed for bridge cable force test, engineers and technicians；
Wherein, fundamental frequency method is widely used in force of bridge inclined cable detection and monitoring with its low cost, convenience.Cable-stayed bridge in reality
Suspension cable quantity it is very big, bridge cable force detection in due to cost etc. can not all carry out real-time cable force monitoring, this is just
A kind of portable bridge cable force detecting device is needed, bridge maintenance personnel can be according to the situation real-time perfoming bridge at bridge scene
Suo Li detection.
Summary of the invention
The present invention will design a kind of portable bridge cable force detecting device, solve bridge maintenance personnel according to the specific of bridge
Situation carries out the demand of stay cable force detection, reduces stay cable force testing cost, it is ensured that bridge security.
To achieve the goals above, technical scheme is as follows:
A kind of portable bridge cable force detecting device, including JSL100-1 Suo Li acceleration transducer, analog signal conditioner
Device, modulus signal converter, data latches, master cpu controller, USB interface and power conversion module；
The output end of the JSL100-1 Suo Li acceleration transducer is through analog signal conditioner device, modulus signal converter
Connect master cpu controller with data latches, the output end of the master cpu controller respectively with modulus signal converter
It is connected with data latches；The master cpu controller is bi-directionally connected with USB interface；
The power conversion module respectively with JSL100-1 Suo Li acceleration transducer, analog signal conditioner device, modulus
Signal adapter, data latches, master cpu controller are connected with USB interface；
The JSL100-1 Suo Li acceleration transducer use MEMS micro-acceleration chip, by signal modulation, filtering,
After signal processing, acceleration signal is converted into voltage signal output.JSL100-1 Suo Li acceleration transducer microchip is micro-
The newest fruits of electronics advanced manufacturing technology.Its basic material be monocrystalline silicon, using micrometer-nanometer processing technology (thin-film deposition, photoetching,
Burn into ion implanting etc.) it is process, using accelerometer made of microchip in sensitivity, resolution ratio, precision, linear, dynamic
All various aspects such as state range and stability have good behaviour, more there is absolute predominance in the ratio of performance to price.Its output end and mould
Quasi- signal conditioner connection.
The acceleration signal conditioning that the analog signal conditioner device obtains JSL100-1 Suo Li acceleration transducer at
Meet the signal of modulus signal converter requirement；
The modulus signal converter realizes the digitlization conversion of analog signal, passes through the logic of master cpu controller
The digital signal converted is latched into data latches by control；
Numerical data of the modulus signal after ADC digitizing is latched into data latches by the data latches, is connect
It is acquired by the data of master control cpu controller, calculates and analyze to carry out data in master cpu controller；
The master cpu controller realizes the data acquisition of JSL100-1 Suo Li acceleration transducer, data computer tube
Reason and data communication；
The USB interface realizes the interface conversion of master cpu controller and host computer communication, i.e., by Transistor-Transistor Logic level signal
It is converted into the USB interface signal of computer identification while realizing data communication facility.
Further, the analog signal conditioner device includes operational amplifier U1, U2, the JSL100-1 Suo Lijia
Velocity sensor output end is connected with 3 feet of operational amplifier U1, synchronous signal input connection signal amplitude limitation protection over the ground
Pipe D1 carries out the limitation protection of discharge voltage amplitude；2 feet of operational amplifier U1 and 6 feet bridging resistance R2 and accurate multi-turn current potential
Device T1, while connecting resistance R1 makees 2 times of in-phase amplifiers to 2 feet over the ground；Since JSL100-1 Suo Li acceleration transducer full scale is defeated
Signal is ± 5V, modulus signal converter full scale input signal ± 10V out, realizes full scale by operational amplifier U1 here
The matching of signal, accurate multiturn potentiometer T1 are used to adjust the amplification factor of operational amplifier U1 in-phase amplifier circuit, it is ensured that
Measurement accuracy satisfaction ± 10V requirement；
4 feet of operational amplifier U1 connect the RC power filter network of -12V power supply, and 7 feet connect the RC power filter of+12V power supply
Network；+ 12V power supply connects with 7 feet of operational amplifier U1 by resistance R3 and connect filter capacitor C1 over the ground simultaneously, resistance R3 with
The RC power filter network of filter capacitor C1 composition+12V power supply guarantees the power good of operational amplifier U1；- 12V power supply warp
It crossing resistance R3 and connects with 4 feet of operational amplifier U1 and connect filter capacitor C1 over the ground simultaneously, resistance R3 and filter capacitor C1 constitute-
The RC power filter network of 12V power supply guarantees the power good of operational amplifier U1.
The 6 feet output of operational amplifier U1 connects 3 feet of operational amplifier U2, and operational amplifier U2 makees follower, and operation is put
1 foot and 5 feet of big device U2 meets accurate multiturn potentiometer T2, carries out circuit advance signal zeroising and handles, and the 4 of operational amplifier U2
The power source treatment method of foot and 7 feet is the same as operational amplifier U1.
1 foot and 8 feet of operational amplifier U2 meets accurate multiturn potentiometer T2, for adjusting the zero of advance signal processing circuit
Point offset.
The modulus signal converter includes modulus signal converter chip U3；6 feet of operational amplifier U2 are through resistance
R4 is connected to 1 foot of modulus signal converter chip U3, and modulus signal converter chip U3 is a 16 high-precisions, high speed, low
Power consumption modulus signal converter, using successive approximation working principle, single+5V power supply, single channel input, input voltage range
±10V；1 foot of modulus signal converter chip U3 and 4 foot connecting resistance R5,4 feet meet capacitor C2 over the ground, and 3 feet connect electricity over the ground
Hold C2；2,5,14,23 and 25 feet are grounded, and 27 and 28 feet meet power supply VCC while connecing filtering decoupling capacitance C1,26 feet over the ground
For data conversion state output pulse signal foot, connects data and latch timing foot CLK_BUSY, 24 feet are modulus signal conversions
Device chip U3 working control signal foot AD_RC；Modulus signal converter chip U3 is turned by the control starting of master cpu controller
It changes, converts the data that data latches needs occurs in rear CLK_BUSY foot and latch clock signal, modulus signal is converted at this time
16 position digital signals that device chip U3 is converted send data latches.
The data latches include two panels data latches chip U4；Two panels data latches chip U4 is 8
Data latches chip is completed 16 data together and is latched；The CLK foot of two panels data latches chip U4 turns with modulus signal
26 feet, that is, CLK_BUSY of parallel operation chip U3 connects；The data input pin of two panels data latches chip U4 respectively with modulus signal
The corresponding least-significant byte of converter chip U3 and most-significant byte connect, the core cpu plate module of data output end and master cpu controller
Low 16 position datawire of U5 connects.What it is due to modulus signal converter chip U3 output is 5V level, and master cpu controller is
3.3V level, the data interaction between them cannot be carried out directly, and data latches need to select LVT family chip here
It is used so that 5V level is become 3.3V level for master cpu controller.Control of the master cpu controller to the chip output of 5V level
Signal processed can be carried out directly.
The working method of the data latches is as follows:
Master cpu controller issues the work of starting modulus signal converter chip U3 by internal processes logic to AD_RC
Make signal；After modulus signal converter chip U3 completes conversion, data will be issued on working state control line CLK_BUSY and will be turned
It changes and completes pulse, directly issue the CLK of data latches chip U4, data latches chip U4 is by modulus signal converter chip
The data that U3 is converted are latched into data latches chip U4；Core cpu plate module U5 is again by internal processes logic control
The data of OC_LV574 read data latch processed are to complete the read-write operation of data；
The master cpu controller includes core cpu plate module U5, is the core devices of whole device, controls institute
There is the work of logic function chip, while carrying out the system administration of data algorithm and data storage.Core cpu plate module U5 itself
With the problem of debugging interface, user is without the concern for artificial debugging and program downloading.The main control chip of core cpu plate module U5
The kernel of STM32f429 is with FPU32- M4CPU, zero etc. is realized in flash storage
Adaptive real-time accelerator (ART accelerator to state runnabilityTM), dominant frequency be up to the MPU of 180MHz, can be realized up to
225DMIPS/1.25DMIPS/MHz the performance of (Dhrystone 2.1) has DSP instruction set；Its memory is up to 2MB
Flash, memory space are the area Liang Ge, and read-write synchronization includes the up to SRAM of 256+4KB, CCM (the kernel coupling including 64-KB
Close memory) data RAM, the flexible external storage control with up to 32 bit data bus: SRAM, PSRAM, SDRAM/
LPSDRSDRAM, CompactFlash/NOR/NAND memory etc..
The reset circuit of the core cpu plate module U5 is made of resistance R1 and capacitor C3, is connected to core cpu template die
The end NRST of block U5, resistance R1 mono- terminate 3.3V, and the one end capacitor C3 ground connection powers on and drags down reset.BOOT load mode selects end
Sub- J1 carries out selection using short-circuit son and connects 3.3V or ground connection, and BOOT0 and BOOT1 loading connect current-limiting resistance R1, program load mode
Short circuit son setting is used according to practical debugging and full speed running situation.
The USB interface includes USB Communication Interface Converter U6, completes Transistor-Transistor Logic level signal and is converted into computer identification
USB interface signal.7,8 feet of USB Communication Interface Converter U6 meet crystal oscillator Y1, while 7,8 feet meet Qi Zhen electricity over the ground
Hold C4；16 supply pins of USB Communication Interface Converter U6 meet decoupling capacitor C1, C2 over the ground；4 feet meet capacitor C1 over the ground；2 feet and 3
Foot connects with the UART1_RX and UART1_RX of core cpu plate module U5 respectively；5 feet and 6 feet connect the 3 of USB interface plug-in unit respectively
Foot and 2 feet；1 foot of USB interface plug-in unit connects+5V power supply, 4 feet ground connection；Realize the usb data of computer and master cpu controller
Communication.
For whole device in view of portable, on-the-spot test is convenient and simple, directly using the 5V of the USB interface of laptop
Power supply power supply, then by the conversion of various power supplys needed for power conversion module realization device inside device, to meet dress
Set power demands.
The power conversion module includes power conversion chip U7 and DC/DC module DS1；Core cpu plate module U5, number
It powers according to latch needs+3.3V, circuit design selects power conversion chip U7 to complete, by the USB interface supply input of device
+ 5V be directly changed into+3.3V power supply required for core cpu plate module U5, data latches, in the input/output terminal of power supply
Using filter capacitor C1 and C2, decoupling operation is carried out.Analog-digital converter needs+5V power supply, directly provided using USB interface+
5V power supply is analog-digital converter power supply.Sensor and the operational amplifier chip needs ± 12V dual power supply of device, circuit are set
Meter selects DC/DC module DS1 to complete, and+the 12V of the supply input of device is directly changed into ± 12V, puts for sensor and operation
Big device power supply.
Further, the core cpu plate module U5 is STM32F429 core board module.
Further, the circuit of whole device is designed using multilayer circuit board.
Further, whole device selects the electronic component of super low-power consumption universal industrial grade.
Further, whole device uses virtual instrument design of electronic circuits technology.
Working principle of the present invention is as follows:
Called portable is exactly that the device that designs is easy to use, is needed since scene carries out cable tension test using upper calculating
Machine, on-the-spot test directly use laptop as host computer, directly use the USB interface of notebook computer here
The power supply of+5V power supply as device.The USB interface maximum output current of notebook computer is 500mA, therefore device
Circuit design requirements strictly consider power problems, selectively electronic device total power consumption cannot be greater than 400mA (cannot expire
It carries and exports electric current using USB interface, be otherwise easily damaged the USB port of notebook computer).
Bridge stay cable vibration signal is the composite signal of multi resonant vibration signal composition, be will appear in spectrum analysis figure multiple
Crest frequency point, the corresponding natural frequency of vibration of each peak point.Portable bridge cable force detecting device is to quick after signal acquisition
It is automatic to carry out Fourier transformation, while being master oscillator frequenc by the highest frequency record of peak value, it is denoted as fn.Due in bridge stay cable
When actual vibration, certain order vibration signals are extremely faint, can not observe in spectrogram, so that certain adjacent peaks point
It, therefore, will be using minimum value in adjacent peak point distance as fundamental frequency f apart from unequal1.Ratio fn/f1It is used as master oscillator frequenc fn
Corresponding order.Portable bridge cable force detecting device calculates automatically provides n value, and external environment restricts when tested person, may
Standard frequency spectrum figure can not be obtained and lead to the n value inaccuracy calculated.Since the inaccuracy of n value causes Suo Li calculated result to be just not allowed
Really.At this point it is possible to carry out multiple Suo Li detection according to the actual situation on site.Portable bridge cable force detecting device will be according to rope
Power fundamental frequency method calculation formula and the parameter W and L of input calculate cable tension power F automatically.Suo Li detects fundamental frequency method calculation formula
It is as follows:
F=4WL2fn 2/n2
Compared with prior art, the invention has the following advantages:
1, the present invention is directly calculated by CPU powerful data according to the actual conditions of engineering structure Suo Li on-the-spot test
Processing function directly extracts Suo Li structural vibration fundamental frequency, and Suo Li fundamental frequency is bridge cable most important parameters, is quickly obtained
Bridge cable force, real-time judge Suo Li situation can quickly judge bridge cable situation, it is ensured that bridge operational safety is extremely
It is important.The present invention directly provides power supply using+5 power supplys that notebook computer USB interface provides for device, does not need outer
It powers up, more increases the portability of device；The vibration signal amplitude of bridge cable itself is bigger with respect to general results, phase
To the easy fundamental frequency signal that can take drag-line itself, device selects JSL100-1 Suo Li acceleration transducer, 16 conversion accuracies
Analog-digital converter can satisfy the requirement of bridge cable force vibration signal completely；High-performance master cpu controller use so that
Device can be stablized, quickly carry out data calculating, to obtain Cable force data；Finally it is achieved that the quick, high-precision of device
Degree, portable cable tension test.
2, its completely new 32 based on ARMv7 framework that master cpu controller of the invention is released using ARM company
MCU-STM32 of Cortex-M3 microcontroller core.Diversified, high cost performance, simple of the STM32 by its product line
Easy-to-use library development scheme, shows one's talent in numerous Cortex-M3MCU rapidly, becomes a most glittering nova.The present invention
It selects the STM32429 that performance is more excellent in STM32 family to carry out control to calculate with data, collected structured data passes through
STM32 powerful data-signal processing tally function directly quickly carries out the works such as the calculating of Suo Li fundamental frequency fft algorithm, data communication
Make.
3, Suo Li acceleration transducer of the invention is the rope selected to obtain fully effective structure monitoring data
The dedicated acceleration transducer of power, sensor itself are a kind of microchip formula acceleration transducers, low-power consumption, it is small and exquisite, be suitable for scene
Installation and removal are the outstanding representatives of bridge cable force test sensor.
4, the monomer that the present invention can be other civil infrastructure health monitorings and have a large capacity and a wide range by changing algorithm
Structure carries out health Evaluation.
5, circuit of the invention is designed using multilayer circuit board, and multilayer circuit board packaging density is high, small in size, light weight,
Due to packaging density height, the line between each component (including component) is reduced, and improves reliability；Increase the wiring number of plies, increasing is set
Count flexibility；The circuit with a constant impedance can be constituted；High speed transmission circuit can be formed；Settable circuit, magnetic circuit shielded layer, also
Settable metal core heat dissipating layer is to meet the functions needs such as shielding, heat dissipation；Debugging is simple, high reliablity.
6, the present invention selects the electronic component of super low-power consumption universal industrial grade.Low-power electronic devices can reduce system
Requirement to power supply can reduce the requirement generated heat and led to the problem of；Technical grade electronic device can increase the practical work of device
Make temperature space, improves the stability of device.
If 7, bridge carries out cable force monitoring using the mode monitored on-line for a long time, need every bar rope that real-time rope will be installed
The appearance of the problems such as power monitoring device, the aging of the drag-line of general bridge is one long-term very long process, a large amount of number in real time
According to really without too big use, this monitoring mode wastes a large amount of manpower and material resources, greatly increases the maintenance of bridge and support
Shield expense.The general bridge block of portable bridge cable force detecting device is equipped with the function that can complete regular visit, fixed
Quickly true bridge cable force situation may be implemented in phase inspection process completely, is greatly lowered the maintenance cost of bridge in this way.
Detailed description of the invention
Fig. 1 is composition schematic diagram of the invention.
Fig. 2 is Suo Li acceleration transducer of the invention, analog signal conditioner device, modulus signal conversion and data latches
Circuit, master cpu controller circuitry schematic diagram.
Fig. 3 is USB interface, power conversion module circuit diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.As shown in Figure 1, including JSL100-1 Suo Li acceleration sensing
Device, analog signal conditioner device, modulus signal converter, data latches, master cpu controller, USB interface and power supply modulus of conversion
Block；The output end of the JSL100-1 Suo Li acceleration transducer is through analog signal conditioner device, modulus signal converter sum number
According to latch connect master cpu controller, the output end of the master cpu controller respectively with modulus signal converter sum number
It is connected according to latch；The master cpu controller is bi-directionally connected with USB interface；The power conversion module respectively with
JSL100-1 Suo Li acceleration transducer, analog signal conditioner device, modulus signal converter, data latches, master cpu control
Device is connected with USB interface.
The modulus signal converter includes modulus signal converter U3, and two sheet data of data latches latches
Device U4, physical circuit are as shown in Figure 2.The master cpu controller includes cpu chip core cpu plate module U5, cpu chip
Reset circuit, physical circuit are as shown in Figure 2.The USB interface includes USB interface chip U6, and physical circuit is as shown in Figure 3.
The power conversion module includes power conversion chip U7 and power module DS1, and physical circuit is as shown in Figure 3.
All components of the present invention and connector can be bought from electronic market, and see Table 1 for details, is conducive to substantially reduce
Manufacturing cost, and improve the performance of device.
Table 1: the unified sequence (one piece of circuit board) in the front and back sides of component label circuit board
The present invention is not limited to the present embodiment, any equivalent concepts within the technical scope of the present disclosure or changes
Become, is classified as protection scope of the present invention.
Claims (7)
1. a kind of portable bridge cable force detecting device, it is characterised in that: including JSL100-1 Suo Li acceleration transducer, simulation
Signal conditioner, modulus signal converter, data latches, master cpu controller, USB interface and power conversion module；
The output end of the JSL100-1 Suo Li acceleration transducer is through analog signal conditioner device, modulus signal converter sum number
According to latch connect master cpu controller, the output end of the master cpu controller respectively with modulus signal converter sum number
It is connected according to latch；The master cpu controller is bi-directionally connected with USB interface；
The power conversion module respectively with JSL100-1 Suo Li acceleration transducer, analog signal conditioner device, modulus signal
Converter, data latches, master cpu controller are connected with USB interface；
The JSL100-1 Suo Li acceleration transducer uses MEMS micro-acceleration chip, by signal modulation, filtering, signal
After processing, acceleration signal is converted into voltage signal output；
The acceleration signal that the analog signal conditioner device obtains JSL100-1 Suo Li acceleration transducer is improved into satisfaction
The signal that modulus signal converter requires；
The modulus signal converter realizes the digitlization conversion of analog signal, passes through the logic control of master cpu controller
The digital signal converted is latched into data latches；
Numerical data of the modulus signal after ADC digitizing is latched into data latches by the data latches, receives master
The data acquisition of cpu controller is controlled, is calculated and analysis to carry out data in master cpu controller；
The master cpu controller realize the data acquisition of JSL100-1 Suo Li acceleration transducer, data management of computing and
Data communication；
The USB interface realizes the interface conversion of master cpu controller and host computer communication, i.e., converts Transistor-Transistor Logic level signal
Data communication facility is realized simultaneously at the USB interface signal of computer identification.
2. a kind of portable bridge cable force detecting device according to claim 1, it is characterised in that: the analog signal
Conditioner includes operational amplifier U1, U2, the JSL100-1 Suo Li acceleration transducer output end and operational amplifier U1
3 feet be connected, synchronous signal input over the ground connection signal amplitude limit protection pipe D1, carry out discharge voltage amplitude limitation protection；
2 feet of operational amplifier U1 and 6 feet bridging resistance R2 and accurate multiturn potentiometer T1, while connecting resistance R1 does 2 times together to 2 feet over the ground
Phase amplifier；
4 feet of operational amplifier U1 connect the RC power filter network of -12V power supply, and 7 feet connect the RC power filter net of+12V power supply
Network；+ 12V power supply connects by resistance R3 with 7 feet of operational amplifier U1 connect filter capacitor C1 over the ground simultaneously, resistance R3 and filter
The RC power filter network of wave capacitor C1 composition+12V power supply；- 12V power supply passes through the 4 foot phases of resistance R3 and operational amplifier U1
It connects while connecting filter capacitor C1, the RC power filter network of resistance R3 and filter capacitor C1 composition -12V power supply over the ground；
The 6 feet output of operational amplifier U1 connects 3 feet of operational amplifier U2, and operational amplifier U2 does follower, operational amplifier
1 foot and 5 feet of U2 meets accurate multiturn potentiometer T2, carries out the processing of circuit advance signal zeroising, 4 feet of operational amplifier U2 and
The power source treatment method of 7 feet is the same as operational amplifier U1；
1 foot and 8 feet of operational amplifier U2 meets accurate multiturn potentiometer T2, and the zero point for adjusting advance signal processing circuit is inclined
It moves；
The modulus signal converter includes modulus signal converter chip U3；6 feet of operational amplifier U2 connect through resistance R4
To 1 foot of modulus signal converter chip U3；1 foot of modulus signal converter chip U3 and 4 foot connecting resistance R5,4 feet are over the ground
Capacitor C2 is met, 3 feet meet capacitor C2 over the ground；2,5,14,23 and 25 feet are grounded, and 27 and 28 feet meet power supply VCC while over the ground
Filtering decoupling capacitance C1 is met, 26 feet are data conversion state output pulse signal foot, and connection data latch timing foot CLK_
BUSY, 24 feet are modulus signal converter chip U3 working control signal foot AD_RC；Modulus signal converter chip U3 passes through
Master cpu controller control starting conversion, convert rear CLK_BUSY foot occur data latches needs data latch when
Sequential signal, 16 position digital signals that modulus signal converter chip U3 is converted at this time send data latches；
The data latches include two panels data latches chip U4；Two panels data latches chip U4 is 8 data
Latch chip is completed 16 data together and is latched；The CLK foot of two panels data latches chip U4 with modulus signal converter
26 feet of chip U3, that is, CLK_BUSY connects；The data input pin of two panels data latches chip U4 is converted with modulus signal respectively
The corresponding least-significant byte of device chip U3 and most-significant byte connect, the core cpu plate module U5's of data output end and master cpu controller
Low 16 position datawire connects；
The working method of the data latches is as follows:
Master cpu controller believes the AD_RC work for issuing starting modulus signal converter chip U3 by internal processes logic
Number；After modulus signal converter chip U3 completes conversion, it is complete data conversion will to be issued on working state control line CLK_BUSY
At pulse, the CLK of data latches chip U4 is directly issued, data latches chip U4 turns modulus signal converter chip U3
The data for changing completion are latched into data latches chip U4；Core cpu plate module U5 is again by internal processes logic control OC_
The data of LV574 read data latch are to complete the read-write operation of data；
The master cpu controller includes core cpu plate module U5, is the core devices of whole device, controls all patrol
The work of functional chip is collected, while carrying out the system administration of data algorithm and data storage；Core cpu plate module U5 itself has
Debugging interface；
The reset circuit of the core cpu plate module U5 is made of resistance R1 and capacitor C3, is connected to core cpu plate module U5
The end NRST, resistance R1 mono- terminate 3.3V, the one end capacitor C3 ground connection, power on and drag down reset；BOOT load mode selects terminal J1,
Carry out selection using short-circuit son and connect 3.3V or ground connection, BOOT0 and BOOT1 loading meet current-limiting resistance R1, program load mode according to
Practical debugging and full speed running situation use short circuit son setting；
The USB interface includes USB Communication Interface Converter U6, completes the USB that Transistor-Transistor Logic level signal is converted into computer identification
Interface signal；7,8 feet of USB Communication Interface Converter U6 meet crystal oscillator Y1, while 7,8 feet connect open vibration capacitor C4 over the ground；
16 supply pins of USB Communication Interface Converter U6 meet decoupling capacitor C1, C2 over the ground；4 feet meet capacitor C1 over the ground；2 feet and 3 feet difference
Connect with the UART1_RX and UART1_RX of core cpu plate module U5；5 feet and 6 feet connect 3 feet and 2 of USB interface plug-in unit respectively
Foot；1 foot of USB interface plug-in unit connects+5V power supply, 4 feet ground connection；Realize that the usb data of computer and master cpu controller communicates；
Whole device directly uses the 5V power supply power supply of the USB interface of laptop, is then realized by power conversion module
The conversion of various power supplys needed for device.
3. a kind of portable bridge cable force detecting device according to claim 2, it is characterised in that: the power supply conversion
Module includes power conversion chip U7 and DC/DC module DS1；Core cpu plate module U5, data latches needs+3.3V power supply,
Circuit design selects power conversion chip U7 to complete, and+the 5V of the USB interface supply input of device is directly changed into core cpu
+ 3.3V power supply required for plate module U5, data latches uses filter capacitor C1 and C2 in the input/output terminal of power supply, into
Row decoupling operation；Analog-digital converter needs+5V power supply is directly analog-digital converter confession using the+5V power supply that USB interface provides
Electricity；Sensor and the operational amplifier chip needs ± 12V dual power supply of device, circuit design select DC/DC module DS1 complete
At+the 12V of the supply input of device is directly changed into ± 12V, is that sensor and operational amplifier are powered.
4. a kind of portable bridge cable force detecting device according to claim 1, it is characterised in that: the core cpu
Plate module U5 is STM32F429 core board module.
5. a kind of portable bridge cable force detecting device according to claim 1, it is characterised in that: the circuit of whole device
It is designed using multilayer circuit board.
6. a kind of portable bridge cable force detecting device according to claim 1, it is characterised in that: whole device is selected super
The electronic component of low-power consumption universal industrial grade.
7. a kind of portable bridge cable force detecting device according to claim 1, it is characterised in that: whole device is using empty
Quasi- electronics circuit design technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910602581.9A CN110220630A (en) | 2019-07-05 | 2019-07-05 | A kind of portable bridge cable force detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910602581.9A CN110220630A (en) | 2019-07-05 | 2019-07-05 | A kind of portable bridge cable force detecting device |
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| Publication Number | Publication Date |
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| CN110220630A true CN110220630A (en) | 2019-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910602581.9A Pending CN110220630A (en) | 2019-07-05 | 2019-07-05 | A kind of portable bridge cable force detecting device |
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| CN (1) | CN110220630A (en) |
Cited By (3)
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Application publication date: 20190910 |