CN217563729U

CN217563729U - Low-power consumption wireless mechanical state monitor

Info

Publication number: CN217563729U
Application number: CN202221044239.5U
Authority: CN
Inventors: 刘桂景; 张玉斌; 陈静诗
Original assignee: Suzhou Dhms Information Technology Co ltd
Current assignee: Suzhou Dhms Information Technology Co ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-10-11
Anticipated expiration: 2032-05-05

Abstract

The utility model provides a wireless mechanical state monitor of low-power consumption, including integrated a plurality of circuits's monitor main circuit board, and with the piezoelectric sensor that monitor main circuit board is connected, the monitor still is provided with the battery that is used for providing the power, the battery with power supply circuit in the monitor main circuit board connects, integrated on the monitor main circuit board have with circuit connection's board antenna of carrying. The beneficial effects of the utility model are embodied in: the monitor has low power consumption, reduces the frequency of battery replacement, is beneficial to field maintenance, and effectively reduces the enterprise cost. Through bluetooth 5.1 agreement, effectively promoted data transmission rate.

Description

Low-power consumption wireless mechanical state monitor

Technical Field

The utility model belongs to the technical field of wireless transmission, concretely relates to low-power consumption wireless mechanical state monitor.

Background

At present, there are many types of mechanical equipment in the world, and rotating parts inside the mechanical equipment, such as gear bearings, etc., are common, and vibration phenomena are generated in the rotating process. Mechanical equipment can also produce the phenomenon such as the rotator is unbalanced, axle and axle are not centering, bearing trouble in the operation process to arouse the vibration of various degree, especially high rotational speed mechanical rotating part vibration surpasss the safety limit value, this will produce serious influence to mechanical equipment's normal operating, cause mechanical equipment's damage even, mechanical equipment's outage can bring very big loss for the enterprise. The vibrations of the mechanical device may to some extent reflect the operating state of the mechanical device and possible malfunctions. The condition monitoring and fault diagnosis of the mechanical equipment are greatly beneficial to reducing the faults of the mechanical equipment and improving the enterprise benefit. The failure of the mechanical equipment can be predicted to a certain extent by monitoring the vibration of the mechanical equipment.

In the past, machine condition detection was typically performed manually. The operation state of the mechanical equipment can be judged by sensing vibration by hands and noise by ears of experienced engineers. However, the rotating speed of the existing mechanical equipment is high, and more alarming vibration signals appear in a high frequency band, so that an engineer can detect the vibration signals only by detecting the mechanical equipment by using handheld vibration detection equipment. However, manual detection of vibration signals is only time-based, and cannot perform long-term fixed-time fixed-point detection on mechanical equipment, collect data, and perform data correlation analysis.

The wired or wireless vibration monitoring device can overcome the defect of manual detection of vibration signals. Currently, elements for detecting vibration signals can be roughly classified into piezoelectric ceramic type, capacitive type, strain type, MEMS, and the like.

The wired temperature vibration monitoring device is inconvenient to apply due to reasons such as wiring, and the wireless temperature vibration monitor is convenient to use, flexible in monitoring point arrangement and widely popularized in recent years. The wireless temperature vibration monitor is divided into communication protocols such as zigbee, lora, wifi, nbiot and bluetooth. Zigbee, lora communication distance is long, but communication speed is not high, zigbee is 250kbps at most, and lora37.5kbps. wifi communication speed is high, but hardly adopts battery powered, nbiot need not equipment such as network management, but communication speed is not high, and is the highest 250kbps, can't place in environment such as under the mine moreover, and current wireless monitor power consumption is fast, need constantly to change the battery.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a low-power wireless mechanical state monitor.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a wireless mechanical state monitor of low-power consumption, including the monitor main circuit board of integrated a plurality of circuits, and with the piezoelectric sensor that monitor main circuit board is connected, the monitor still is provided with the battery that is used for providing the power, the battery with power supply circuit in the monitor main circuit board is connected, integrated on the monitor main circuit board have with circuit connection's board antenna.

Preferably, an MCU circuit connected with the power circuit is integrated in the monitor main circuit board, the MCU circuit is respectively connected with the flash storage circuit, the RTC clock circuit and the temperature detection circuit, and the MCU circuit is connected with the onboard antenna through a radio frequency circuit with an impedance conditioning effect.

Preferably, the MCU circuit is further connected with the ADC circuit, the ADC circuit is connected with the piezoelectric sensor, and a power supply control circuit is further arranged between the MCU circuit and the ADC acquisition circuit.

Preferably, the battery is a lithium thionyl chloride or lithium manganese dioxide based battery.

Preferably, a low-power-consumption Bluetooth system-on-chip is arranged in the MCU circuit.

Preferably, an IIC protocol temperature detection chip is arranged in the temperature detection circuit, and a data bus of the IIC protocol temperature detection chip is connected with a low-power-consumption bluetooth system-on-chip.

Preferably, the bluetooth low energy system-on-chip adopts a bluetooth 5.1 protocol.

Preferably, the on-board antenna is a PCB on-board printed antenna.

Preferably, the piezoelectric sensor is a shear type piezoelectric sensor.

The beneficial effects of the utility model are embodied in: the monitor has low power consumption, reduces the frequency of battery replacement, is beneficial to field maintenance, and effectively reduces the enterprise cost. Through bluetooth 5.1 agreement, effectively promoted data transmission rate.

Drawings

FIG. 1: the utility model discloses a connection structure schematic diagram.

FIG. 2: the utility model discloses a power supply circuit's realization principle topological diagram.

FIG. 3: the utility model discloses a power control circuit's realization principle topological diagram.

FIG. 4: the utility model discloses the realization principle sketch map of well radio frequency circuit impedance recuperation.

Detailed Description

The utility model discloses a low-power consumption wireless mechanical state monitor, the monitor is used for monitoring temperature and vibration. During practical use, the monitor can be connected with the wireless gateway and uploads data to the cloud. The number of the monitors can reach 256-512 at most. Referring to fig. 1, the monitor includes a monitor main circuit board integrating a plurality of circuits, and a piezoelectric sensor connected to the monitor main circuit board, the monitor is further provided with a battery for providing a power supply, the battery is connected to a power supply circuit in the monitor main circuit board, and an onboard antenna connected to the circuit is integrated on the monitor main circuit board. The onboard antenna is a PCB onboard printed antenna.

The plurality of circuits comprise MCU circuits connected with the power circuit, the MCU circuits are respectively connected with the flash storage circuit, the RTC clock circuit and the temperature detection circuit, and the MCU circuits are connected with the onboard antenna through the radio frequency circuit with the impedance conditioning function. The MCU circuit is further connected with the ADC circuit, the ADC circuit is connected with the piezoelectric sensor, and a power supply control circuit is further arranged between the MCU circuit and the ADC acquisition circuit. Through power supply circuit and power control circuit, can change the power of battery into the power of adaptation in other circuits to via MCU control, reach the purpose of power control between different circuits.

The utility model discloses in, the battery supplies power for whole monitor, adopts lithium thionyl chloride or lithium manganese dioxide class battery, and this type of battery is small and the electric quantity is high to provide the long-time duration of the monitor. The piezoelectric sensor is a shear type piezoelectric sensor which can convert vibration energy of mechanical equipment into an electric signal.

And a low-power consumption Bluetooth system on chip (SoC) chip is arranged in the MCU circuit. The low-power-consumption Bluetooth system on chip takes an ARM-Cortex-M4 CPU as a core and integrates a Bluetooth 5.1 protocol stack, a 2.4 GHz RF transceiver, an on-chip programmable memory Flash, an RAM and various peripherals.

The temperature detection circuit is internally provided with an IIC protocol temperature detection chip, and a data bus of the IIC protocol temperature detection chip is connected with a low-power-consumption Bluetooth system-on-chip. The temperature detection chip of the IIC protocol can detect the temperature information of the mechanical equipment body in time.

At a certain moment, the monitor MCU needs to collect temperature and vibration information, the MCU can start the signal of the ADC collecting circuit power supply for the power supply control circuit, and after the ADC circuit and the piezoelectric sensor are powered on, the piezoelectric sensor collects mechanical equipment vibration and outputs an analog vibration signal to the ADC circuit. The ADC circuit converts the analog signal into a digital signal, and then the digital signal is sent to the MCU through the digital bus, the MCU can perform a series of processing, for example, FFT operation is performed on vibration data, and the calculated result is transmitted through the radio frequency circuit and the antenna until the result is received by the wireless gateway.

Furthermore, as shown in fig. 2, the implementation principle of the power supply circuit is combined, the battery voltage is 3.6V, the battery power supply directly supplies power to the RTC clock circuit, the MCU circuit and the piezoelectric sensor, and the bluetooth SoC chip in the MCU circuit outputs 1.8V voltage power to supply power to the low-power flash chip in the flash memory circuit. The battery power is supplied to a linear voltage reduction device DC-DC on the main circuit board to be reduced to 1.8V and supplied to the digital circuit side of the ADC circuit. The other path is boosted to 5.0V and 5.0V by a charge pump, and then is supplied to a linear voltage-reducing device for DC-DC voltage reduction to 3.3V, and then the 3.3V voltage is finally supplied to the temperature detection circuit and the analog circuit side of the ADC circuit. Therefore, the electric quantity stored in the battery can be utilized to the maximum, and when the voltage of the battery is reduced to 2.6V, the monitor can still work normally.

Combine fig. 3 shown, the utility model discloses well power control circuit principle structure, MCU's IO mouth has the IO mouth of the same kind to be connected to power control circuit, when this way IO is the high level, ADC chip in the ADC circuit, ADC front-end circuit, piezoelectric sensor power is put through, MCU begins to communicate with the ADC chip, and the collection work of monitor begins to go on. As shown in fig. 4, an output impedance circuit matched with the bluetooth rf port is formed in the rf circuit through C22, C28, L1, and C29. C21, C30, L2 to match the antenna impedance circuit.

The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A low-power consumption wireless mechanical state monitor, characterized in that: the monitor comprises a monitor main circuit board integrating a plurality of circuits and a piezoelectric sensor connected with the monitor main circuit board, wherein a battery used for providing a power supply is further arranged on the monitor, the battery is connected with a power circuit in the monitor main circuit board, and an onboard antenna connected with the circuit is integrated on the monitor main circuit board.

2. A low power consumption wireless mechanical condition monitor as defined in claim 1, wherein: the monitor is characterized in that an MCU circuit connected with the power circuit is integrated in the main circuit board of the monitor, the MCU circuit is respectively connected with the flash storage circuit, the RTC clock circuit and the temperature detection circuit, and the MCU circuit is connected with the onboard antenna through a radio frequency circuit with an impedance conditioning effect.

3. A low power consumption wireless mechanical condition monitor as defined in claim 2, wherein: the MCU circuit is further connected with the ADC circuit, the ADC circuit is connected with the piezoelectric sensor, and a power supply control circuit is further arranged between the MCU circuit and the ADC acquisition circuit.

4. A low power consumption wireless mechanical condition monitor as defined in claim 1, wherein: the battery is a lithium thionyl chloride or lithium manganese dioxide battery.

5. A low power consumption wireless mechanical condition monitor as defined in claim 2, wherein: and a low-power consumption Bluetooth system-on-chip is arranged in the MCU circuit.

6. A low power consumption wireless mechanical condition monitor as recited in claim 5, wherein: the temperature detection circuit is internally provided with an IIC protocol temperature detection chip, and a data bus of the IIC protocol temperature detection chip is connected with a low-power-consumption Bluetooth system-on-chip.

7. A low power consumption wireless mechanical condition monitor as recited in claim 5, wherein: the low-power-consumption Bluetooth system-on-chip adopts a Bluetooth 5.1 protocol.

8. A low power consumption wireless mechanical condition monitor as defined in claim 2, wherein: the on-board antenna is a PCB on-board printed antenna.

9. A low power consumption wireless mechanical condition monitor as defined in claim 1, wherein: the piezoelectric sensor is a shear type piezoelectric sensor.