Wireless vibration temperature sensor

Abstract

The utility model provides a wireless vibration temperature sensor, which comprises a sensor base, a sensor cylinder body arranged on the sensor base, a battery compartment arranged in the sensor cylinder body, a circuit board arranged on one side of the battery compartment, a sensor top cover arranged at the upper end of the sensor cylinder body, and a temperature sensor arranged on the sensor top cover. The sensor base comprises a base body, a piezoelectric vibration sensor and a temperature sensor are arranged on the base body, a threaded hole is formed in the center of the bottom of the base body, and the base body is arranged on external equipment in the mode that a bolt penetrates through the threaded hole. Through the characteristics of integrated design, comprehensive monitoring capability, wireless communication technology, high-precision measurement, temperature compensation capability, real-time data uploading, ultra-low power consumption and the like, an accurate and efficient monitoring solution is provided for numerous industries, and the working efficiency and the safety are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical vibration state signal collection technical field, concretely is a wireless vibration temperature sensor. BACKGROUND

[0002] The wireless vibration sensor adopts battery power supply and is directly installed on the rotating equipment. Usually, three vibration measurement parameters (acceleration, speed and displacement) are measured. The surface temperature range of the rotating equipment monitoring measurement point position is generally -40 DEG C to +125 DEG C. The wireless sensor is installed on the equipment for a long time, and the temperature of the piezoelectric vibration sensor in the wireless sensor also changes with the equipment temperature and the environment temperature. Due to the temperature drift characteristic of the piezoelectric vibration sensor, the sensitivity changes, and finally the vibration measurement value will exceed the allowable error range of ±5%.

[0003] At present, temperature compensation is used to suppress the influence of environmental temperature on the characteristics of the vibration measuring instrument. The main methods are temperature self-compensation, parallel temperature compensation, thermistor temperature compensation and feedback temperature compensation. The thermistor with negative temperature coefficient is used for compensation, which can offset a part of the error caused by temperature change. However, because the measurement value of the vibration measuring instrument and the temperature change are not completely linear, and the compensation circuit is also difficult to completely coincide with the temperature change. Therefore, in the actual temperature compensation, complete compensation cannot be achieved, and the measurement value still exceeds the accuracy at some temperatures. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem in the background art, and provides a wireless vibration temperature sensor.

[0005] The utility model solves the technical problem by adopting the following technical scheme: a wireless vibration temperature sensor, comprising: a sensor base, a sensor barrel is arranged on the sensor base, a battery compartment is arranged in the sensor barrel, a circuit board is arranged on one side of the battery compartment, a sensor top cover is arranged on the top of the sensor barrel, the sensor base comprises a base, a piezoelectric vibration sensor and a temperature sensor are arranged on the base, a threaded hole is arranged at the center of the bottom of the base, and the base is arranged on an external equipment through bolts penetrating the threaded hole.

[0006] Further, the piezoelectric vibration sensor is composed of a charge output shear type piezoelectric sensor and a piezoelectric amplification circuit, and the charge output shear type piezoelectric sensor and the piezoelectric amplification circuit are packaged in a stainless steel shell.

[0007] Further, the piezoelectric vibration sensor is provided with a mounting hole I, the base is provided with a mounting hole II, the mounting hole I is arranged correspondingly to the mounting hole II, the temperature sensor is provided with heat-conducting silicone grease around and is fixed in the mounting hole II of the base, and the upper end of the temperature sensor is mounted on the mounting hole I.

[0008] Further, two lithium sub-batteries are mounted in the battery compartment, the lithium sub-batteries have large capacity and weak self-discharge, and the battery compartment is fixed on the sensor barrel by screws.

[0009] Further, the circuit board comprises an MCU circuit, the MCU circuit is connected with an LORA wireless communication circuit and an ADC circuit, the MCU circuit is connected with a digital and analog power supply circuit, the digital and analog power supply circuit is connected with a battery, the ADC circuit is connected to the piezoelectric vibration sensor through a vibration sensor conditioning circuit on the circuit board, the ADC circuit is also connected to the temperature sensor and the battery through a conditioning circuit on the circuit board, the vibration sensor conditioning circuit mainly realizes signal filtering and hardware integration circuit, the ADC circuit can realize up to 8 channels of synchronous acquisition, realizes synchronous measurement of vibration signals A / V / D / temperature / battery voltage, and the MCU circuit realizes measurement management, vibration data temperature compensation algorithm and data wireless communication.

[0010] Compared with the prior art, the piezoelectric vibration sensor has the advantages that: the piezoelectric vibration sensor has the characteristics of integrated design, comprehensive monitoring capability, wireless communication technology, high-precision measurement, temperature compensation capability, real-time data uploading and ultra-low power consumption, and provides accurate and efficient monitoring solutions for many industries, and significantly improves work efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structural schematic view of the utility model.

[0012] Fig. 2 It is a structural schematic view of the sensor base.

[0013] Fig. 3 It is a circuit board structure principle view of the utility model.

[0014] Fig. 4 It is a working principle view of the sensor of the utility model.

[0015] In the drawing: 100-sensor base; 101-sensor barrel; 102-battery compartment; 103-circuit board; 104-sensor top cover; 201-stainless steel base; 202-piezoelectric vibration sensor; 203-temperature sensor. DETAILED DESCRIPTION

[0016] In order to make the implementation technical means, creation characteristics, achieve the purpose and easy to understand the function of the utility model, the following specific illustration, further expounds the utility model, in the description of the utility model, it is pointed out that, unless otherwise specified and limited, the term "installation", "link", "connection" should be broad understanding, for example, can be fixedly connected, can be detachably connected, or integrally connected can be mechanical connection, can be electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements.

[0017] As Figs. 1-4 Indicated, a wireless temperature sensor, comprising: sensor base 100, the sensor base 100 is provided with sensor barrel 101, the sensor barrel 101 is provided with battery compartment 102, one side of the battery compartment 102 is provided with circuit board 103, the upper end of the sensor barrel 101 is provided with sensor top cover 104, the sensor base 100 includes base 201, the base 201 is provided with piezoelectric vibration sensor 202 and temperature sensor 203, the bottom center of the base 201 is provided with threaded hole 200, the base 201 is arranged on the external device by bolt passing through the threaded hole.

[0018] Further, the piezoelectric vibration sensor 202 is composed of charge output shear type piezoelectric sensor and piezoelectric amplification circuit, the charge output shear type piezoelectric sensor and piezoelectric amplification circuit are packaged in stainless steel shell, improve the anti-interference ability.

[0019] Further, the piezoelectric vibration sensor 202 is composed of charge output shear type piezoelectric sensor and piezoelectric amplification circuit, the charge output shear type piezoelectric sensor and piezoelectric amplification circuit are packaged in stainless steel shell, improve the anti-interference ability.

[0020] Further, two lithium sub-batteries are installed in the battery compartment 102, the lithium sub-battery has large capacity and weak self-discharge, is suitable for wireless sensor power supply, the battery compartment 102 is fixed on the sensor barrel 101 by screw, ensures that no looseness occurs, so as to avoid bringing vibration measurement error.

[0021] Further, the circuit board 103 comprises an MCU circuit, the MCU circuit is connected with an LORA wireless communication circuit and an ADC circuit, the MCU circuit is connected with a digital and analog power supply circuit, the digital and analog power supply circuit is connected with a battery, the ADC circuit is connected with the piezoelectric vibration sensor 202 through a vibration sensor conditioning circuit on the circuit board, the ADC circuit is also connected with a temperature sensor 203 and the battery through a conditioning circuit on the circuit board, the vibration sensor conditioning circuit mainly realizes signal filtering, a hardware integration circuit, the ADC circuit can realize maximum 8 channels of synchronous acquisition, realizes synchronous measurement of vibration signal A / V / D / temperature / battery voltage, and the MCU circuit realizes measurement management, vibration data temperature compensation algorithm and data wireless communication.

[0022] Further, the sensor top cover 104 is made of transparent PC material, which can ensure the temperature resistance of the sensor and facilitate the user to observe the sensor state indicator light on the circuit board (103) without opening the sensor.

[0023] The wireless vibration temperature sensor first obtains a temperature correction curve. In the range of -40℃ to 125℃, the vibration temperature curve of the piezoelectric vibration sensor 202 is measured as a temperature correction curve and stored in the MCU circuit in the circuit board 103. After the wireless vibration temperature sensor obtains the vibration measurement value, the vibration measurement value is corrected by calling the temperature correction curve in the MCU circuit, so as to realize temperature compensation.

[0024] The wireless vibration temperature sensor can measure the total value of vibration and vibration waveform data. The vibration waveform data is large, so the utility model designs a time division multiplexing communication mechanism to upload the vibration waveform data in packets, which meets the limitation of LORA wireless communication, avoids communication interference between wireless vibration temperature sensors and channel long-time occupation problems.

[0025] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model. These changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A wireless temperature sensor, comprising: The utility model provides a sensor base (100), its characterized in be: the sensor base (100) be provided with sensor barrel body (101), be provided with battery compartment (102) in sensor barrel body (101), one side of battery compartment (102) is provided with circuit board (103), the upper end of sensor barrel body (101) is provided with sensor top cover (104), the sensor base (100) includes base (201), be provided with piezoelectric vibration sensor (202) and temperature sensor (203) on base (201), the bottom center of base (201) is provided with threaded hole (200), base (201) is set on external equipment through bolt passing through threaded hole, circuit board (103) includes MCU circuit, be connected with LORA wireless communication circuit and ADC circuit on MCU circuit, be connected with digital and analog power supply circuit on MCU circuit, be connected with battery on digital and analog power supply circuit, ADC circuit is connected to piezoelectric vibration sensor (202) through vibration sensor conditioning circuit on circuit board, ADC circuit is also connected to temperature sensor (203) and battery through conditioning circuit on circuit board.

2. A wireless temperature sensor as claimed in claim 1, characterized in that: Piezoelectric vibration sensor (202) is composed of charge output shear piezoelectric sensor and piezoelectric amplification circuit, and the charge output shear piezoelectric sensor and piezoelectric amplification circuit are packaged in a stainless steel shell.

3. A wireless temperature sensor as claimed in claim 1, characterized in that: One side of the piezoelectric vibration sensor (202) is provided with a mounting hole I, and the base (201) is provided with a mounting hole II, the mounting hole I is arranged corresponding to the mounting hole II, the temperature sensor (203) is fixed in the mounting hole II of the base (201) by heat-conducting silicone grease around the temperature sensor (203), and the upper end of the temperature sensor (203) is mounted on the mounting hole I.

4. A wireless temperature sensor as claimed in claim 1, characterized in that: Two lithium sub-batteries are installed in the battery compartment (102), the lithium sub-batteries have large capacity and weak self-discharge, and the battery compartment (102) is fixed on the sensor barrel body (101) by screws.

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