Dual-mode vibration transmitter for low sampling rate occasion

Abstract

The utility model discloses a dual-mode vibration transmitter for low-sampling-rate occasions, which comprises a shell, and an initial vibration signal pickup unit, a signal conditioning board, a first mode circuit board, a second mode circuit board and an EMC (Electro Magnetic Compatibility) circuit board are sequentially arranged in the shell from bottom to top; and a sealing strip and a mounting frame for mounting each unit and the circuit board are also arranged in the shell. The device adopts a two-mode output mode to reduce cost and configuration requirements, the signal conditioning and amplifying circuit receives a vibration signal of the initial vibration signal pickup unit, an acceleration signal picked up by the single sensitive body unit is divided into two paths, the two paths of signals are processed into slow signals, and the slow signals are transmitted to the single sensitive body unit. The requirement for the sampling rate of a rear-end acquisition system is low, the two paths of signals are both 4-20 mA signal output, the anti-interference capability is high, the vibration monitoring requirement of a complex industrial site is met, the required hardware resource configuration is low, and the cost overhead is low.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of vibration sensors, in particular to a dual-mode vibration transmitter used in low sampling rate situations. Background Art

[0002] In the prior art, among the sensors currently used to monitor mechanical rotating equipment and vibrating equipment, vibration sensors are the mainstream to achieve monitoring.

[0003] Existing vibration sensors are mainly divided into three types: displacement sensors, velocity sensors and acceleration sensors. In a specific engineering application environment, to monitor whether the equipment is faulty, the effective value of the velocity is generally used to characterize the energy or intensity of the equipment vibration, and the peak value of the acceleration is used to characterize the magnitude of the impact force in the equipment vibration.

[0004] Most of the vibration sensors currently used output a single physical quantity when outputting signals. However, obtaining multiple physical quantities requires extremely high sampling rate acquisition equipment and data storage units. By picking up uncontaminated high-frequency acceleration signals and then performing corresponding calculus and diagnostic algorithm calculations based on the relationship between the three physical quantities, the physical quantity values ​​corresponding to the required mechanical fault information can be obtained.

[0005] However, the algorithm in the above technical solution is complex, and when it is deployed on a large scale for a group of units, the required hardware resource configuration requirements are very high, which increases cost expenditure and operational difficulty.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a dual-mode vibration transmitter for low sampling rate occasions which has a reasonable structure and can effectively reduce hardware resource configuration and cost overhead. Summary of the invention

[0007] The purpose of the utility model is to provide a dual-mode vibration transmitter for low sampling rate occasions in view of the shortcomings of the prior art; its technical solution is as follows:

[0008] A dual-mode vibration transmitter for low sampling rate applications comprises a shell, in which an initial vibration signal pickup unit, a signal conditioning board, a first mode circuit board, a second mode circuit board and an EMC circuit board are sequentially installed from bottom to top; and a sealing strip and a mounting frame for installing each unit and the circuit board are also arranged in the shell.

[0009] Furthermore, the signal conditioning board is provided with a signal conditioning amplifier circuit; the first mode circuit board is provided with a peak detection processing module; the second mode circuit board is provided with an RMS processing module;

[0010] The signal conditioning and amplification circuit receives the signal from the initial vibration signal pickup unit and performs signal conditioning and amplification, and then divides the signal into two paths, one of which is connected to the peak detection processing module; and the other is connected to the RMS processing module.

[0011] Furthermore, a current signal processing module 71 is also provided in the shell; an EMC circuit is provided on the EMC circuit board; the peak detection processing module is connected to one current signal processing module 71; the RMS processing module is connected to another current signal processing module; and the two current signal processing modules are respectively connected to the EMC circuits, and the two EMC circuits are correspondingly connected to the data acquisition system.

[0012] Furthermore, the current signal processing module processes the received signal into a 4-20mA current signal.

[0013] Furthermore, a mounting seat is also provided at the lower end of the shell, and the mounting seat is detachably mounted with an external device by means of a snap-fit.

[0014] Furthermore, a socket assembly is installed at the upper end of the shell, and the socket assembly is detachably installed corresponding to the external device.

[0015] Beneficial effects: The utility model has the following beneficial effects:

[0016] 1) The structural design of the device is reasonable. The initial vibration signal pickup unit, signal conditioning board, first mode circuit board, second mode circuit board and EMC circuit board are designed from top to bottom in the shell; and a sealing strip and a mounting frame for installing each unit and circuit board are also provided in the shell, and a mounting seat and socket assembly are designed to facilitate disassembly and installation with external equipment. The structural design is very reasonable;

[0017] 2) This device uses two modes of output to reduce costs and configuration requirements. The signal conditioning and amplification circuit receives the vibration signal of the initial vibration signal pickup unit, and divides the acceleration signal picked up by the single sensitive unit into two paths. Both signals are processed into slow signals, which has low sampling rate requirements for the back-end acquisition system. Both signals use 4-20mA signal output, have strong anti-interference ability, are more suitable for complex industrial site vibration monitoring needs, require low hardware resource configuration, and have low cost overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the structural diagram of the utility model;

[0019] Figure 2 This is a working principle diagram of the utility model. DETAILED DESCRIPTION

[0020] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, a dual-mode vibration transmitter for low sampling rate applications includes a housing 1, in which an initial vibration signal pickup unit 2, a signal conditioning board 3, a first mode circuit board 4, a second mode circuit board 5 and an EMC circuit board 6 are installed in sequence from bottom to top; and a sealing strip 7 and a mounting frame 8 for mounting each unit and the circuit board are also provided in the housing 1.

[0022] The signal conditioning board 3 is provided with a signal conditioning amplifier circuit 31; the first mode circuit board 4 is provided with a peak detection processing module 41; the second mode circuit board 5 is provided with an RMS processing module 51;

[0023] like Figure 2 As shown, after the signal conditioning and amplification circuit 31 receives the signal from the initial vibration signal pickup unit 2 and performs signal conditioning and amplification, the signal is divided into two paths, one of which is connected to the peak detection processing module 41 ; and the other is connected to the RMS processing module 51 .

[0024] A current signal processing module 71 is also provided in the housing 1; an EMC circuit 61 is provided on the EMC circuit board 6; the peak detection processing module 41 is connected to one current signal processing module 71; the RMS processing module 51 is connected to another current signal processing module 71; and the two current signal processing modules 71 are respectively connected to the EMC circuit 61, and the two EMC circuits 61 are correspondingly connected to the data acquisition system 81.

[0025] The current signal processing module 71 processes the received signal into a 4-20 mA current signal.

[0026] A mounting seat 9 is also provided at the lower end of the shell 1, and the mounting seat 9 is detachably mounted with an external device by means of a snap-fit; a socket assembly 10 is installed at the upper end of the shell 1, and is detachably mounted with the external device by means of the socket assembly 10.

[0027] The working principle of the device is as follows: In the vibration transmitter of the device, the signal conditioning and amplification circuit receives the vibration signal of the initial vibration signal pickup unit, and divides the acceleration signal picked up by the single sensitive body unit into two paths;

[0028] One path is sent to the peak detection processing module; the other path is sent to the RMS processing module for peak detection and RMS processing to obtain two signals, namely the acceleration peak signal and the speed RMS signal. Finally, the VI signal is converted into a 4-20mA current signal through the current signal processing module. After this design, since the acceleration and speed signals are respectively processed by peak detection and RMS conversion and finally become slow signals, the sampling rate requirement for the data acquisition system is extremely low.

[0029] A single vibration sensor can be used to achieve two modes of 4-20mA signal output. While obtaining both the peak acceleration value and the true effective value of velocity, it reduces the high hardware resource configuration, algorithm complexity, and cost overhead of the sensor's backend.

[0030] The above-mentioned specific implementation mode is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A dual-mode vibration transmitter for low sampling rate applications, characterized in that: The invention comprises a housing (1), wherein an initial vibration signal pickup unit (2), a signal conditioning board (3), a first mode circuit board (4), a second mode circuit board (5) and an EMC circuit board (6) are installed in sequence from bottom to top in the housing (1); and a sealing strip (7) and a mounting frame (8) for mounting the units and the circuit boards are also provided in the housing (1).

2. A dual-mode vibration transmitter for low sampling rate applications according to claim 1, characterized in that: The signal conditioning board (3) is provided with a signal conditioning amplification circuit (31); the first mode circuit board (4) is provided with a peak detection processing module (41); and the second mode circuit board (5) is provided with an RMS processing module (51); The signal conditioning and amplifying circuit (31) receives the signal from the initial vibration signal pickup unit (2) and performs signal conditioning and amplification, and then divides the signal into two paths, one of which is connected to the peak detection processing module (41); and the other is connected to the RMS processing module (51).

3. A dual-mode vibration transmitter for low sampling rate applications according to claim 2, characterized in that: A current signal processing module (71) is also provided in the housing (1); an EMC circuit (61) is provided on the EMC circuit board (6); the peak detection processing module (41) is connected to a current signal processing module (71); the RMS processing module (51) is connected to another current signal processing module (71); and the two current signal processing modules (71) are respectively connected to the EMC circuit (61), and the two EMC circuits (61) are respectively connected to the data acquisition system (81).

4. A dual-mode vibration transmitter for low sampling rate applications according to claim 3, characterized in that: The current signal processing module (71) processes the received signal into a 4-20 mA current signal.

5. A dual-mode vibration transmitter for low sampling rate applications according to claim 1, characterized in that: A mounting seat (9) is also provided at the lower end of the housing (1), and the mounting seat (9) is detachably mounted to an external device in a snap-fit ​​manner.

6. A dual-mode vibration transmitter for low sampling rate applications according to claim 1, characterized in that: A socket assembly (10) is mounted on the upper end of the housing (1), and is detachably mounted corresponding to an external device via the socket assembly (10).

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