CN216819810U - Trigger strain control amplifier - Google Patents
Trigger strain control amplifier Download PDFInfo
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- CN216819810U CN216819810U CN202123203371.4U CN202123203371U CN216819810U CN 216819810 U CN216819810 U CN 216819810U CN 202123203371 U CN202123203371 U CN 202123203371U CN 216819810 U CN216819810 U CN 216819810U
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- pass filter
- bridge voltage
- comparator
- gain amplifier
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- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000001960 triggered effect Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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Abstract
The utility model discloses a trigger strain control amplifier which comprises a supply bridge voltage, wherein the supply bridge voltage, a signal input, a gain amplifier, a high-pass filter, a low-pass filter, a comparator, FPGA signal processing and drive output are connected in sequence; the signal input comprises a resistor R1, the resistor R1, the resistor R2, the resistor R3 and the resistor Rt form a closed loop in an end-to-end connection mode, the connection end of the resistor R1 and the resistor R2 is connected with a negative electrode-EG of a bridge voltage, and the connection end of the resistor R3 and the resistor Rt is connected with a positive electrode + EG of the bridge voltage. The utility model carries out measurement based on very small physical quantity, and the measurement threshold value can reach +/-200 mu epsilon; the high bandwidth has greatly promoted transmission speed, and the interference killing feature is stronger, realizes real-time, continuous, accurate measurement to the material deformation, has advantages such as real-time, continuous, high accuracy, job stabilization, nondestructive measurement.
Description
Technical Field
The utility model relates to the technical field of control systems, in particular to a trigger strain control amplifier.
Background
With the rapid development of the traffic industry in China, the bridge plays an important role in the process of developing economy as an important part in traffic. However, in the using process of the bridge, the performance is reduced or the quality is hidden danger is caused by aging or unpredictable factors, and collapse accidents happen seriously. In order to ensure the safety of the bridge in the using process, the bearing capacity of the bridge is periodically detected and evaluated or important parameters of the bridge are monitored in real time for a long time. In the control system in the prior art, the controller has small measurement threshold, low bandwidth, low transmission speed and weak anti-interference capability, so that the control system is unstable in work and cannot realize real-time, continuous and accurate measurement of material deformation.
Disclosure of Invention
The present invention is to solve the above-mentioned problems and to provide a triggered strain control amplifier.
In order to achieve the technical purpose and achieve the technical requirements, the utility model adopts the technical scheme that: trigger strain control amplifier, including supplying bridge voltage, its characterized in that: the bridge voltage, the signal input, the gain amplifier, the high-pass filter, the low-pass filter, the comparator, the FPGA signal processing and the drive output are connected in sequence; the signal input comprises a resistor R1, a resistor R1, a resistor R2, a resistor R3 and a resistor Rt form a closed loop according to a head-tail connection mode, the connection end of the resistor R1 and the resistor R2 is connected with a negative electrode-EG of a bridge voltage, the connection end of the resistor R3 and the resistor Rt is connected with a positive electrode + EG of the bridge voltage, the connection end of the resistor R1 and the resistor Rt is connected with a non-inverting input end of a gain amplifier, the connection end of the resistor R2 and the resistor R3 is connected with an inverting input end of the gain amplifier, a gain resistor Rg is arranged on the gain amplifier, the output end of the gain amplifier is connected with the input end of a high-pass filter after being connected with a capacitor, the output end of the high-pass filter is connected with the input end of a low-pass filter, and the output end of the low-pass filter is connected with the input end of a comparator after being connected with the resistor.
Preferably: the supply bridge voltage provides a stable supply bridge voltage of 2.048V.
Preferably: the gain amplifier model is set to AD8226, the low pass filter model is set to THS4551, and the comparator model is set to LM 358.
Preferably: when the strain value is less than 200 mu epsilon, the output of the comparator is 12V; when the strain value is greater than 200 mu epsilon, the comparator output is 0V.
Compared with the traditional structure, the utility model has the beneficial effects that:
1. the utility model carries out measurement based on very small physical quantity, and the measurement threshold value can reach +/-200 mu epsilon; the high bandwidth has greatly promoted transmission speed, and the interference killing feature is stronger, realizes real-time, continuous, accurate measurement to the material deformation, has advantages such as real-time, continuous, high accuracy, job stabilization, nondestructive measurement.
2. The utility model can complete the measurement of various physical quantities such as strain stress, vibration, impact, explosion and the like, converts the various physical quantities into electric signals and switching value output, completes the functions of alarming, interlocking protection, switch control and the like, and is widely applied to industrial control systems in the fields of bridges, aviation, power stations and the like.
Drawings
FIG. 1 is a schematic diagram of a circuit structure according to the present invention;
in the figure: 1. the method comprises the steps of bridge voltage supply, signal input 2, gain amplifier 3, high-pass filter 4, low-pass filter 5, comparator 6, FPGA signal processing 7 and drive output 8.
Detailed Description
The present invention is further described below.
Referring to the drawings, a triggered strain controlled amplifier, comprising a supply bridge voltage 1, is characterized in that: the bridge supply voltage 1, the signal input 2, the gain amplifier 3, the high-pass filter 4, the low-pass filter 5, the comparator 6, the FPGA signal processing 7 and the drive output 8 are connected in sequence; the signal input 2 comprises a resistor R1, the resistor R1, a resistor R2, a resistor R3 and a resistor Rt form a closed loop in a head-to-tail connection mode, the connection end of the resistor R1 and the resistor R2 is connected with the negative pole-EG for the bridge voltage 1, the connection end of the resistor R3 and the resistor Rt is connected with the anode + EG of the bridge voltage 1, the connection end of the resistor R1 and the resistor Rt is connected with the non-inverting input end of the gain amplifier 3, the connection end of the resistor R2 and the resistor R3 is connected with the inverting input end of the gain amplifier 3, a gain resistor Rg is arranged on the gain amplifier 3, the output end of the gain amplifier 3 is connected with the capacitor and then is connected with the input end of the high-pass filter 4, the output end of the high-pass filter 4 is connected with the input end of the low-pass filter 5, and the output end of the low-pass filter 5 is connected with the input end of the comparator 6 after being connected with the resistor.
In the preferred embodiment, the supply bridge voltage 1 provides a stable supply bridge voltage of 2.048V.
In the preferred embodiment, the model of the gain amplifier 3 is set as AD8226, the model of the low-pass filter 5 is set as THS4551, and the model of the comparator 6 is set as LM 358.
In the preferred embodiment, when the strain value is less than 200 μ ∈, the output of the comparator 6 is 12V; when the strain value is greater than 200 mu epsilon, the output of the comparator 6 is 0V.
In specific implementation, the utility model provides a strain-triggered drive output, which comprises a strain gauge, a bridge voltage, an amplifying circuit, a filter circuit, a single chip microcomputer, an execution component and the like which are arranged on metal, wherein according to the change of the strain quantity of the strain gauge, an electric signal of an input signal changes along with the change of the strain quantity, the electric signal is converted into a signal which can be identified by a comparator through the amplifying circuit and the filter circuit, the comparator is used for comparing the received signal with a threshold value, and when an instrument measures that the input strain value is less than 200 mu epsilon, the output of the comparator is 12V; when the strain value is larger than 200 mu epsilon, the comparator is inverted and outputs a 0V pulse. The external devices are connected through the drive output, and functions of alarming, interlocking protection, switch control and the like can be completed.
Supply bridge voltage: the module uses a high-stability voltage chip, and the function of the high-stability voltage chip is to provide a stable supply bridge voltage with the size of 2.048V; signal input: the working mode can select different bridge modes through program control according to actual requirements, and stable and reliable signal input is provided; a gain amplification circuit: the instrument amplifier with the wide power supply voltage range is adopted, only one external resistor is needed to set the gain, and the measuring range of the instrument reaches +/-1000 mu epsilon by changing the size of the gain resistor; a high-pass filter: a filter which allows frequencies above 100Hz to pass, but attenuates frequencies below 100Hz significantly, and which functions to remove unwanted low frequency components or low frequency interference from the signal; a low-pass filter: allowing frequencies lower than 1MHz to pass, and when the frequency is higher than the cut-off frequency, not allowing the frequency to pass, wherein the effect is to remove unnecessary high-frequency components in the signal or remove high-frequency interference; a comparator: a circuit for comparing an analog voltage signal with a reference voltage, in the present invention, when the strain value is less than 200 mu epsilon, the comparator output is 12V; when the strain value is larger than 200 mu epsilon, the comparator is turned over, and the output is 0V; FPGA signal processing: the FPGA has the obvious advantages of a serial and parallel working mode, high integration level, high speed, high reliability and the like, meanwhile, the number of chips can be reduced in the chip-based design, the system volume is reduced, the energy consumption is reduced, the performance index and the reliability of the system are improved, and the FPGA signal processing aims at removing interference signals and preventing false triggering; a drive circuit: the purpose is to improve the output capacity of signals, and achieve the functions of alarming, switching value control and the like according to the output of a driving circuit through an external device.
The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (4)
1. Triggered strain controlled amplifier comprising a supply bridge voltage (1), characterized in that: the bridge supply voltage (1), the signal input (2), the gain amplifier (3), the high-pass filter (4), the low-pass filter (5), the comparator (6), the FPGA signal processing (7) and the drive output (8) are connected in sequence; the signal input (2) comprises a resistor R1, the resistor R1, a resistor R2, a resistor R3 and a resistor Rt form a closed loop in a head-to-tail connection mode, the connection end of the resistor R1 and the resistor R2 is connected with the negative electrode-EG of the bridge voltage (1), the connecting end of the resistor R3 and the resistor Rt is connected with the anode + EG of the bridge voltage (1), the connection end of the resistor R1 and the resistor Rt is connected with the non-inverting input end of the gain amplifier (3), the connection end of the resistor R2 and the resistor R3 is connected with the inverting input end of the gain amplifier (3), a gain resistor Rg is arranged on the gain amplifier (3), the output end of the gain amplifier (3) is connected with a capacitor and then is connected with the input end of the high-pass filter (4), the output end of the high-pass filter (4) is connected with the input end of the low-pass filter (5), and the output end of the low-pass filter (5) is connected with the input end of the comparator (6) after being connected with the resistor.
2. The triggered strain control amplifier of claim 1, wherein: the supply bridge voltage (1) provides a stable supply bridge voltage of 2.048V.
3. The triggered strain control amplifier of claim 1, wherein: the gain amplifier (3) is set to be AD8226 in model, the low-pass filter (5) is set to be THS4551 in model, and the comparator (6) is set to be LM358 in model.
4. The triggered strain control amplifier of claim 1, wherein: when the measured input strain value is less than 200 mu epsilon, the output of the comparator (6) is 12V; when the strain value is larger than 200 mu epsilon, the output of the comparator (6) is 0V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123203371.4U CN216819810U (en) | 2021-12-20 | 2021-12-20 | Trigger strain control amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123203371.4U CN216819810U (en) | 2021-12-20 | 2021-12-20 | Trigger strain control amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216819810U true CN216819810U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123203371.4U Expired - Fee Related CN216819810U (en) | 2021-12-20 | 2021-12-20 | Trigger strain control amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216819810U (en) |
-
2021
- 2021-12-20 CN CN202123203371.4U patent/CN216819810U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220624 |