Integrated Acceleration, Speed and Vibration Sensor

Abstract

Disclosed is an integrated acceleration, speed and vibration sensor. The sensor includes a housing, a base, a sensing and signal processing circuit, a current loop circuit, an anti-surge PTC and an aviation plug. The housing is mounted on the base. The sensing and signal processing circuit and the current loop circuit are used to fabricate a PCB circuit board, and then the PCB circuit board is mounted in the housing. A power supply and signal line is connected to the aviation plug. An M6 threaded hole is formed in a bottom of the housing of the sensor and is used to connect with an object to be detected. A power supply is negatively connected to one end of a varistor and the other end of the varistor is connected to the housing as the anti-surge PTC to play a protective role. The M6 threaded hole formed in the bottom of the housing of the sensor is used to connect with the object to be detected and improve the stability. At the same time, after the PCB circuit board is mounted, adhesive filling is performed to improve the vibration resistance.

Claims

1. An integrated acceleration, speed and vibration sensor, wherein the integrated acceleration, speed and vibration sensor comprises a housing, a base, a sensing and signal processing circuit, a current loop circuit, an anti-surge PTC and an aviation plug; and the housing is mounted on the base, the sensing and signal processing circuit and the current loop circuit are used to fabricate a PCB circuit board, then the PCB circuit board is mounted in the housing, a power supply and signal line is connected to the aviation plug, and an M6 threaded hole is formed in a bottom of the housing of the sensor and is used to connect with an object to be detected.

2. The integrated acceleration, speed and vibration sensor according to claim 1, wherein the sensing and signal processing circuit adopts ADXL335 as a core, and an X-axis of a No. 12 pin corresponds to acceleration of vibration in a vertical direction, which is divided into two loops of signals.

3. The integrated acceleration, speed and vibration sensor according to claim 2, wherein one loop of signal 3U21N of the two loops of signals is amplified by an in-phase proportional amplifier circuit to directly output an acceleration voltage signal; the other loop of signal 3U1IN+is converted into a current signal through an integrator circuit, then transmitted to an amplifier circuit, output to a low-pass filter circuit for DC filtering, transmitted to an RES-to-DC circuit, and finally transmitted to a 4-20 mA current output circuit through an amplifier circuit to output a speed current signal.

4. The integrated acceleration, speed and vibration sensor according to claim 3, wherein a power supply is negatively connected to one end of a varistor and the other end of the varistor is connected to the housing as the anti-surge PTC to play a protective role.

Description

BRIEF DESCRIPTION OF FIGURES

[0016] FIG. 1 is a structural diagram of an ADXL335 accelerometer integrated chip.

[0017] FIG. 2 is a diagram of an in-phase proportional amplifier circuit.

[0018] FIG. 3 is a diagram of an amplifier circuit.

[0019] FIG. 4 is a diagram of a first-order active low-pass filter circuit.

[0020] FIG. 5 is a diagram of an RES-to-DC circuit.

[0021] FIG. 6 is a diagram of an amplifier circuit.

[0022] FIG. 7 is a diagram of a 4-20 mA current output circuit.

[0023] FIG. 8 is a diagram of a sensing and signal processing circuit.

[0024] FIG. 9 is a diagram of a current loop circuit.

[0025] FIG. 10 is a cross-sectional view of a housing of a sensor.

DETAILED DESCRIPTION

[0026] The disclosure will be described in detail below in combination with specific examples.

[0027] Example 1

[0028] Referring to FIG. 1 to FIG. 10, the disclosure provides an integrated acceleration, speed and vibration sensor. The integrated acceleration, speed and vibration sensor includes a housing, a base, a sensing and signal processing circuit, a current loop circuit, an anti-surge PTC and an aviation plug.

[0029] The housing is mounted on the base; the sensing and signal processing circuit and the current loop circuit are used to fabricate a PCB circuit board; then the PCB circuit board is mounted in the housing; a power supply and signal line is connected to the aviation plug; and an M6 threaded hole is formed in a bottom of the housing of the sensor and is used to connect with an object to be detected. A power supply is negatively connected to one end of a varistor and the other end of the varistor is connected to the housing as the anti-surge PTC to play a protective role.

[0030] The sensing and signal processing circuit adopts ADXL335 as a core. ADXL335 is a small, thin, low-power and complete three-axis accelerometer, which provides signal conditioned voltage output and can measure acceleration in a minimum±3 g full-scale range. It can measure static gravity acceleration in tilt detection applications and dynamic acceleration caused by motion, impact or vibration.

[0031] The sensor takes an ADXL335 accelerometer integrated chip shown in FIG. 1 as the core. The X-axis acceleration of a No. 12 pin is output. The X-axis corresponds to acceleration of vibration of the sensor in a vertical direction, which is then divided into two loops of signals. One loop of signal (3U2IN+) is amplified by an in-phase proportional amplifier circuit shown in FIG. 2 to directly output an acceleration voltage signal; the other loop of signal (3U1IN+) is converted into a current signal through an integrator circuit, then transmitted to an amplifier circuit shown in FIG. 3, output to a low-pass filter circuit shown in FIG. 4 for DC filtering, transmitted to an RES-to-DC circuit shown in FIG. 5, and finally transmitted to a 4-20 mA current output circuit shown in FIG. 7 through an amplifier circuit shown in FIG. 6 to output a speed current signal. A power supply is negatively connected to one end of a varistor and the other end of the varistor is connected to the housing as the anti-surge PTC to play a protective role.

[0032] The above is just the preferred implementation of an integrated acceleration, speed and vibration sensor. The protection scope of the integrated acceleration, speed and vibration sensor is not limited to the above example. All technical solutions under this idea belong to the protection scope of the disclosure. It should be noted that those skilled in the art can make several improvements and changes without departing from the principle of the disclosure, which, however, should also be regarded as being included in the protection scope of the disclosure.