CN218633914U - Sensor data acquisition device - Google Patents
Sensor data acquisition device Download PDFInfo
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- CN218633914U CN218633914U CN202222855901.1U CN202222855901U CN218633914U CN 218633914 U CN218633914 U CN 218633914U CN 202222855901 U CN202222855901 U CN 202222855901U CN 218633914 U CN218633914 U CN 218633914U
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Abstract
The application discloses sensor data acquisition device. The device comprises: the processor, at least one AD synchronous acquisition chip, and the operational amplifier circuits which are in one-to-one correspondence with the plurality of sensors; the processor is connected with at least one AD synchronous acquisition chip through a preset communication bus; the AD synchronous acquisition chip is connected with the corresponding sensors through the operational amplifier circuits; and the clocks of at least one AD synchronous acquisition chip are synchronous. The problem of in the correlation technique under the more condition of sensor, not only inefficiency is gathered alone, can't guarantee synchronous collection moreover is solved.
Description
Technical Field
The application relates to the field of industrial vibration collection, in particular to a sensor data collection device.
Background
In the field of industrial acquisition testing, the most common test item is the testing of machine vibration. Therefore, the testing of vibration on an industrial production line directly affects the efficiency of industrial production. The common vibration test method in the prior art comprises single-path and multi-path measurement, the analysis of multiple measuring points cannot be well realized, and the measurement of the multiple measuring points needs to be provided with a plurality of test devices, so that the realization cost is high.
Aiming at the problems that in the prior art, under the condition that the number of sensors is large, the single acquisition is low in efficiency and synchronous acquisition cannot be guaranteed, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The main objective of this application provides a sensor data acquisition device to under the more condition of quantity of sensor among the solution correlation technique, gather not only inefficiency alone, can't guarantee the problem of synchronous collection moreover.
In order to achieve the above object, according to one aspect of the present application, there is provided a sensor data acquisition apparatus including: the processor, at least one AD synchronous acquisition chip, and the operational amplifier circuits which are in one-to-one correspondence with the sensors; the processor is connected with at least one AD synchronous acquisition chip through a preset communication bus; the AD synchronous acquisition chip is connected with the corresponding sensors through a plurality of operational amplifier circuits; and the clock of at least one AD synchronous acquisition chip is synchronous.
Optionally, the operational amplifier circuit includes: the positive input end of the operational amplifier is connected with the positive output end of the sensor; and the output end of the operational amplifier is connected with the corresponding AD synchronous acquisition chip through a voltage stabilizing resistor.
Optionally, the operational amplifier circuit further includes: the positive power supply input end and the negative power supply input end of the operational amplifier are respectively connected with the positive output end and the negative output end of the power supply; the positive power supply input end of the operational amplifier is grounded through a first voltage-stabilizing capacitor; and the negative power supply input end of the operational amplifier is grounded through a second voltage-stabilizing capacitor.
Optionally, the output end of the operational amplifier is connected to the negative input end.
Optionally, the output end of the operational amplifier is connected to the negative input end through a constant value resistor.
Optionally, the operational amplifier circuit further includes: a protection capacitor; one end of the protective capacitor is connected with the positive electrode output end of the sensor, and the other end of the protective capacitor is connected with the positive electrode input end of the operational amplifier.
Optionally, the operational amplifier circuit further includes: a voltage regulator diode; and the anode of the voltage stabilizing diode is connected with the other end of the protection capacitor, and the cathode of the voltage stabilizing diode is grounded.
Optionally, the operational amplifier circuit further includes: a ground resistor; one end of the grounding resistor is connected with the other end of the protection capacitor, and the other end of the grounding resistor is grounded.
Optionally, the number of the sensors is 16, and the number of the AD synchronous acquisition chips is 2; each AD synchronous acquisition chip is connected with 8 sensors; the sensor is arranged on a measured object of the vibration test.
Optionally, the AD synchronous acquisition chip is an AD7606 chip; the preset communication bus is a Flexible Memory Controller (FMC) bus.
This application is put the circuit through fortune and is enlargied and filtering treatment the signal of sensor output, and carry out synchronous collection through AD synchronous acquisition chip to the fortune of a plurality of sensors and put the circuit, the acquisition signal of synchronous acquisition multichannel sensor has been reached, the vibration test in-process has been realized having improved, the technological effect of the collection efficiency of the acquisition signal of a plurality of sensors of multiple spot test, the vibration test in-process has been avoided, need adopt many sets of acquisition circuit, gather alone single or a small amount of sensor, the cost that exists is high, low efficiency, and can't guarantee synchronous problem, and then under the more condition of quantity of sensor in the correlation technique, gather not only inefficiency alone, and can't guarantee synchronous acquisition's problem.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic diagram of a sensor data acquisition device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an operational amplifier circuit provided in accordance with an embodiment of the present application;
fig. 3 is a schematic diagram of a 16-way sensor synchronous acquisition flow provided according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention is described below with reference to preferred implementation steps, and fig. 1 is a schematic diagram of a sensor data acquisition device provided in an embodiment of the present application, as shown in fig. 1, to achieve the above object, according to an aspect of the present application, there is provided a sensor data acquisition device, including:
the system comprises a processor 11, at least one AD synchronous acquisition chip 12 and operational amplifier circuits 14 which correspond to a plurality of sensors 13 one by one; the processor 11 is connected with at least one AD synchronous acquisition chip 12 through a preset communication bus 15; the AD synchronous acquisition chip 12 is connected with a plurality of corresponding sensors 13 through a plurality of operational amplifier circuits; wherein, the clocks of at least one AD synchronous acquisition chip 12 are synchronous.
The device, amplify and filtering the signal of sensor output through the fortune circuit, and carry out synchronous collection to the fortune circuit of a plurality of sensors through AD synchronous acquisition chip, the acquisition signal of synchronous acquisition multi-channel sensor has been reached, the vibration test in-process has been realized having improved, the technological effect of the collection efficiency of the acquisition signal of a plurality of sensors of multiple spot test, the vibration test in-process has been avoided, need adopt many sets of acquisition circuit, gather alone single or a small amount of sensor, the cost that exists is high, low efficiency, and can't guarantee synchronous problem, and then under the more condition of quantity of sensor in the correlation technique has been solved, gather not only inefficiency alone, and can't guarantee synchronous acquisition's problem.
The multiple sensors are connected with the AD synchronous acquisition chip to realize synchronous acquisition of data of multiple sensors, so that the acquisition efficiency is improved, synchronous acquisition is guaranteed, the operation of time alignment alone is not needed, and multiple groups of obtained signals are synchronous in time. Compare all need gather in prior art every sensor, then carry out time alignment to the data of a plurality of sensors of gathering, degree of automation is higher, and efficiency is higher, and the rate of accuracy is higher. An operational amplifier circuit is arranged between each sensor and the AD synchronous acquisition chip
The AD synchronous acquisition chip is an analog-to-digital conversion AD chip with a synchronous acquisition function. The chip is provided with a plurality of pins to be connected with a plurality of sensors to realize synchronous acquisition of the sensors.
The AD synchronous acquisition chips can be multiple, and due to the fact that the number of pins of one AD synchronous acquisition chip is limited, the number of the sensors capable of synchronously acquiring is also limited, therefore, under the condition that the number of the sensors needing to be synchronously acquired is large, a plurality of AD synchronous acquisition chips can be adopted. At this time, it should be noted that when there are a plurality of AD synchronous acquisition chips, the clocks of the plurality of AD synchronous acquisition chips are consistent, so as to ensure clock synchronization between different AD synchronous acquisition chips.
In other embodiments, if the time difference of different AD synchronous acquisition chips can be detected, it is also not required that the clocks of multiple AD synchronous acquisition chips are consistent, and when different AD synchronous acquisition chips are subsequently analyzed, the clock alignment can be realized by combining the time difference, so as to realize clock synchronization of different AD synchronous acquisition chips.
The operational amplifier circuit is used for carrying out operations such as filtering, denoising and amplifying on analog signals directly output by the sensor, namely, preprocessing the analog signals directly output by the sensor so as to facilitate subsequent processing operations.
The communication bus can establish a fast and stable data transmission channel between the AD synchronous acquisition chip and the processor. The data between the AD synchronous acquisition chip and the processor can be transmitted quickly and efficiently.
Optionally, the operational amplifier circuit includes: the positive input end of the operational amplifier is connected with the positive output end of the sensor; the output end of the operational amplifier is connected with the corresponding AD synchronous acquisition chip through a voltage stabilizing resistor; the output end of the operational amplifier is connected with the negative input end.
The core of the operational amplifier circuit is an operational amplifier, the anode input end of the operational amplifier is connected with the anode output end of the sensor, and the analog signal output by the sensor can be transmitted to the anode input end of the operational amplifier from the anode output end. It should be noted that the positive input terminal of the operational amplifier is also the non-inverting input terminal, and the negative input terminal is also the inverting input terminal.
The output end of the operational amplifier is connected with the corresponding AD synchronous acquisition chip through a voltage stabilizing resistor, and the processed analog signal is sent to the AD synchronous acquisition chip. The voltage stabilizing resistor is used for outputting a signal with stable voltage and avoiding the impact on an AD chip caused by large signal change amplitude.
The output end of the operational amplifier is connected with the negative electrode input end to form a negative feedback circuit, so that the gain stability is improved: under the condition of negative feedback, the closed-loop gain is not influenced or slightly influenced by the parameter change of peripheral components, so that the gain stability is improved; reduction of non-linear distortion: the negative feedback is independent of the open loop gain, i.e., has little relation to the non-linear variation in the open loop transmission, thereby reducing the non-linear distortion. Noise can also be suppressed: peripheral device noise is mainly suppressed. Bandwidth expansion: less affected by frequency variations.
The basic performance of the circuit is greatly improved after negative feedback is introduced, but the amplification factor is reduced; the negative feedback can suppress the nonlinear influence caused by the temperature to a large extent. The deeper the feedback depth is, the smaller the voltage amplification factor is, and the stronger the regulation capacity of the circuit is; under certain conditions, negative feedback may become positive feedback that destroys the normal performance of the amplifier circuit.
Optionally, the operational amplifier circuit further includes: the voltage stabilizing capacitor, the positive power supply input end and the negative power supply input end of the operational amplifier are respectively connected with the positive output end and the negative output end of the power supply; the positive power supply input end of the operational amplifier is grounded through a first voltage-stabilizing capacitor; and the negative power supply input end of the operational amplifier is grounded through a second voltage-stabilizing capacitor.
The operational amplifier further comprises two power supply ends for supplying power to the operational amplifier, namely a positive power supply input end and a negative power supply input end. And the positive power supply input end and the negative power supply input end are respectively connected with the positive output end and the negative output end of the power supply.
It should be noted that the power supply of the operational amplifier may be a plurality of power supplies, and in the process of not continuously supplying power to the operational amplifier, there is likely electric power shock, and in order to avoid such electric power shock, the positive power input end of the operational amplifier is grounded through the first voltage-stabilizing capacitor, and the negative power input end of the operational amplifier is grounded through the second voltage-stabilizing capacitor, so as to buffer the electric power shock, and improve the power supply stability and safety.
Optionally, the output end of the operational amplifier is connected with the negative input end through a constant value resistor. And the current feedback of the output end is changed into voltage feedback through the fixed value resistor.
Optionally, the operational amplifier circuit further includes: a protection capacitor; one end of the protective capacitor is connected with the positive electrode output end of the sensor, and the other end of the protective capacitor is connected with the positive electrode input end of the operational amplifier.
The protective capacitor is used for blocking interference direct current output by the sensor, blocking interference current in an analog signal output by the sensor and having a certain filtering function. One end of the protective capacitor is connected with the positive electrode output end of the sensor, and the other end of the protective capacitor is connected with the positive electrode input end of the operational amplifier.
Optionally, the operational amplifier circuit further includes: a voltage regulator diode; the anode of the voltage stabilizing diode is connected with the other end of the protective capacitor, and the cathode of the voltage stabilizing diode is grounded.
The voltage stabilizing diode is used for stabilizing the voltage of a circuit between the sensor and the operational amplifier, and avoids the voltage from generating large fluctuation to cause the faults and damages of components on the circuit. The anode of the voltage stabilizing diode is connected with the other end of the protective capacitor, and the cathode of the voltage stabilizing diode is grounded, so that the circuit voltage is stabilized.
Optionally, the operational amplifier circuit further includes: a ground resistor; one end of the grounding resistor is connected with the other end of the protective capacitor, and the other end of the grounding resistor is grounded.
The ground resistor can be used for avoiding electric shock accidents, preventing static electricity and preventing lightning. One end of the grounding resistor is connected with the other end of the protective capacitor, and the other end of the grounding resistor is grounded.
Optionally, the number of the sensors is 16, and the number of the AD synchronous acquisition chips is 2; each AD synchronous acquisition chip is connected with 8 sensors; the sensor is arranged on a measured object of the vibration test.
Optionally, the AD synchronous acquisition chip is an AD7606 chip; the preset communication bus is a Flexible Memory Controller (FMC) bus.
Each AD7606 chip is connected with 8 sensor circuits, and the two AD7606 sensors are connected with 16 sensor circuits in total, and 16 sensors are synchronously acquired. The sensors are arranged at a plurality of different positions on a measured object of the vibration test.
It should be noted that this embodiment also provides an optional implementation, and details of this implementation are described below.
The purpose of this embodiment is to overcome the deficiency and defect of the prior art, and provide a device for realizing multi-channel and synchronous acquisition. The method is realized by the following technical scheme:
FIG. 2 is a schematic diagram of an operational amplifier circuit provided in accordance with an embodiment of the present application; fig. 3 is a schematic diagram of a synchronous acquisition process of 16-channel sensors according to an embodiment of the present application, and as shown in fig. 2 and fig. 3, an acceleration 16-channel synchronous acquisition device includes a power supply Vcc, a 16-channel acceleration signal acquisition circuit, an operational amplifier circuit, a 16-channel AD synchronous acquisition circuit, and a processor circuit. The device is provided with 16 paths of acceleration sensors, enters an AD synchronous acquisition circuit for analog-to-digital conversion after shaping and filtering of an acceleration acquisition circuit, and can quickly transmit values to a processor for processing through an FMC bus.
The multi-path synchronous acquisition of the embodiment realizes the synchronous acquisition of multiple measuring points, realizes the synchronous analysis of multiple points, more accurately masters the running state of a machine, reduces the arrangement of multiple sets of vibration acquisition equipment and reduces the arrangement cost.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A sensor data acquisition device, comprising: the processor, at least one AD synchronous acquisition chip, and the operational amplifier circuits which are in one-to-one correspondence with the sensors;
the processor is connected with at least one AD synchronous acquisition chip through a preset communication bus;
the AD synchronous acquisition chip is connected with the corresponding sensors through a plurality of operational amplifier circuits;
and the clock of at least one AD synchronous acquisition chip is synchronous.
2. The apparatus of claim 1, wherein the op-amp circuit comprises: an operational amplifier is provided for the first time,
the positive input end of the operational amplifier is connected with the positive output end of the sensor;
and the output end of the operational amplifier is connected with the corresponding AD synchronous acquisition chip through a voltage stabilizing resistor.
3. The apparatus of claim 2, wherein the op-amp circuit further comprises: a voltage-stabilizing capacitor,
the positive power supply input end and the negative power supply input end of the operational amplifier are respectively connected with the positive output end and the negative output end of the power supply;
the positive power supply input end of the operational amplifier is grounded through a first voltage stabilizing capacitor; and the negative power supply input end of the operational amplifier is grounded through a second voltage-stabilizing capacitor.
4. The apparatus of claim 2,
and the output end of the operational amplifier is connected with the negative electrode input end.
5. The apparatus of claim 4,
and the output end of the operational amplifier is connected with the negative electrode input end through a constant value resistor.
6. The apparatus of claim 2, wherein the op-amp circuit further comprises: a protection capacitor;
one end of the protective capacitor is connected with the positive electrode output end of the sensor, and the other end of the protective capacitor is connected with the positive electrode input end of the operational amplifier.
7. The apparatus of claim 6, wherein the op-amp circuit further comprises: a voltage regulator diode;
and the anode of the voltage stabilizing diode is connected with the other end of the protection capacitor, and the cathode of the voltage stabilizing diode is grounded.
8. The apparatus of claim 7, wherein the op-amp circuit further comprises: a ground resistor;
one end of the grounding resistor is connected with the other end of the protective capacitor, and the other end of the grounding resistor is grounded.
9. The device according to any one of claims 1 to 8,
the number of the sensors is 16, and the number of the AD synchronous acquisition chips is 2;
each AD synchronous acquisition chip is connected with 8 sensors;
the sensor is arranged on a measured object of the vibration test.
10. The apparatus of claim 9,
the AD synchronous acquisition chip is an AD7606 chip;
the preset communication bus is a Flexible Memory Controller (FMC) bus.
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| CN202222855901.1U CN218633914U (en) | 2022-10-27 | 2022-10-27 | Sensor data acquisition device |
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| CN202222855901.1U CN218633914U (en) | 2022-10-27 | 2022-10-27 | Sensor data acquisition device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116124133A (en) * | 2023-04-18 | 2023-05-16 | 中国船舶集团有限公司第七〇七研究所 | Multi-channel synchronous accelerometer measurement method and device and inertial navigation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116124133A (en) * | 2023-04-18 | 2023-05-16 | 中国船舶集团有限公司第七〇七研究所 | Multi-channel synchronous accelerometer measurement method and device and inertial navigation system |
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