CN210513344U - Magnetostrictive liquid level meter sensor with self-calibration function - Google Patents
Magnetostrictive liquid level meter sensor with self-calibration function Download PDFInfo
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- CN210513344U CN210513344U CN201920190238.3U CN201920190238U CN210513344U CN 210513344 U CN210513344 U CN 210513344U CN 201920190238 U CN201920190238 U CN 201920190238U CN 210513344 U CN210513344 U CN 210513344U
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Abstract
The utility model provides a magnetostrictive liquid level meter sensor with self calibration function improves and has added the self calibration function. The magnetostrictive liquid level sensor is widely applied to petrochemical engineering and places needing liquid level measurement due to the characteristics of high precision and high stability. Magnetostriction has the characteristic of high precision, but because the guided wave wire material is influenced by high and low temperatures, the echo transmission speed of the sensor has certain difference on different temperature occasions, so that the sensor measurement has errors, and in order to reduce the errors, the patent introduces a magnetostriction liquid level sensor with a self-calibration function, and has the characteristics of being more reliable and more stable compared with the traditional magnetostriction liquid level meter sensor.
Description
Technical Field
The utility model relates to a need level measurement's device with trades such as petrochemical industry, smelting, food, specifically relate to magnetostrictive level gauge sensor, this equipment is equipped with automatic calibration device, has more reliable and more stable than traditional level gauge, reduces the level gauge precision and receives the temperature influence, functions such as non-maintaining automatic calibration.
Background
The magnetostrictive liquid level sensors in the industry today monitor the moving magnet with a non-contact measurement technique, and because the magnet and sensor are not in direct contact, the sensor can work properly even in harsh industrial environments, such as those susceptible to contamination from oil, solution, dust, or other contaminants, and in addition, can withstand high temperatures, pressures, and high vibration environments. The output signal of the sensor is absolute value, so that if the power supply is interrupted and reconnected, the problem of data receiving can not be caused, and the zero position does not need to be adjusted again. Such sensors are suitable for use in a variety of different industrial automation environments, such as: mechanical control and liquid level measurement, etc. Since the sensing elements are all non-contacting, there is no wear on the sensor, even if the sensing process is repeated. However, due to the influence of high and low temperatures on the sensor, the magnetostrictive effect echo propagation speed generated by the floating ball has a certain difference, so that the magnetostrictive liquid level sensors on different temperature occasions have certain measurement errors.
The utility model discloses increased self calibration induction unit based on traditional level gauge basis, can realize single-point or multiple spot calibration to the sensor in whole range, reduce sensor measuring error, have more reliable more stable characteristics for traditional magnetostrictive liquid level gauge sensor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure is compact, the stable performance, and it is convenient to maintain, can carry out self-calibration's sensor arrangement to traditional magnetostrictive level gauge sensor. The method solves the problem of measurement error caused by no automatic calibration in the prior art. The technical scheme for solving the technical problem is as follows: a magnetostrictive liquid level meter sensor with a self-calibration function comprises a self-calibration induction unit, wherein the self-calibration induction unit is connected to an electronic measurement unit through a cable, and adopts a magnetic sensitive electronic component to sense the position of a magnetic floating ball, feed back the position to the electronic measurement unit through a high level electric signal, and compare the position with prestored data for calibration. The single or a plurality of self-calibration sensing units are fixedly arranged in the sensor, single-point or multi-point calibration of the liquid level meter sensor can be realized, the whole process is automatically realized by the electronic unit, manual participation is not needed, the workload is greatly reduced, the labor cost is reduced, and the measurement precision of the magnetostrictive liquid level meter sensor is improved.
Drawings
Fig. 1 is a schematic diagram of the components of a magnetostrictive liquid level gauge sensor according to the present invention with self-calibration.
Fig. 2 is a schematic structural diagram of a self-calibration sensing unit of the magnetostrictive liquid level meter sensor with a self-calibration function according to the present invention.
Detailed Description
Example 1
As shown in fig. 1 and 2, the present invention relates to a magnetostrictive liquid level gauge sensor with self-calibration function. The self-calibration sensing unit (4) is fixed at a proper position in the range of the magnetostrictive liquid level sensor, single-point or multi-point distribution can be selected according to the accuracy requirement of the sensor, when single-point calibration is selected, the self-calibration sensing unit (4) is fixed at the middle position of the sensor, and uniform distribution is adopted at multiple points.
Taking the three-point calibration in fig. 1 as an example, after the magnetostrictive sensor is produced and calibrated, the magnetic floating balls (6) are respectively placed at the positions of the self-calibration sensing units (207/208/209), and the data measured by the sensor is recorded and stored in the storage device of the electronic measuring unit (201). When the magnetostrictive liquid level meter sensor works normally, every time the magnetic floating ball (6) reaches the position of the self-calibration sensing unit (207/208/209), the self-calibration sensing unit (207/208/209) feeds back a high-level signal to the electronic measuring unit (201) through the feedback signal wire (202/203/204); the electronic measurement unit (201) compares the current test value with factory calibration stored data. And when the current measurement data exceeds the sensor error requirement, the propagation speed of the echo is calibrated again to realize automatic calibration.
The utility model discloses to magnetostrictive liquid level meter sensor many times, multiple spot, check-up or calibration repeatedly, reduced traditional magnetostrictive liquid level meter measuring error in the very big degree, it is simple to use reliable, need not artificial operation.
Claims (7)
1. A magnetostrictive level gauge sensor with self-calibration, comprising: the device comprises six parts, namely a cable joint (1), a sensor shell (5), an electronic measuring unit (2), a magnetostrictive detection sensor (3), a self-calibration induction unit (4) and a magnetic floating ball (6), wherein the electronic measuring unit, the magnetostrictive detection sensor and the self-calibration induction unit are highly integrated in the sensor shell through connecting cables and a circuit board.
2. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: the magnetostrictive detection sensor (3) is a mechanical part which converts a measurement inquiry pulse generated by the electronic measuring unit (2) and an induction echo generated by the magnetic floating ball (6) into an electric pulse signal through a measuring coil based on the magnetostrictive effect.
3. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: the self-calibration induction unit (4) is internally provided with a magnetic sensitive switch electronic component and can induce the position of the magnetic floating ball (6), when the magnetic floating ball (6) reaches the position of the magnetic sensitive switch, the magnetic sensitive switch component can generate a high-level signal, and the signal is fed back to the electronic measurement unit (2) through a cable.
4. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: the electronic measuring unit (2) uses a singlechip as a main control electronic device, and a matched power supply and a signal amplifying circuit form a detection magnetostrictive detection sensor (3) to detect the mechanical wave fed back, thereby achieving the purpose of liquid level measurement.
5. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: the sensor shell (5) is a mechanical shell for loading the magnetostrictive detection sensor (3), the self-calibration sensing unit (4) and the electronic measuring unit (2), and plays a role in supporting and protecting the internal structure.
6. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: the magnetic floating ball (6) is fixed inside the floating ball by a plurality of pieces of magnetic steel, is equal to the density of the liquid to be detected, can move up and down in the sensor shell (5) along with the liquid level of the liquid to be detected, and generates a corresponding magnetic signal to be supplied to the magnetostrictive detection sensor (3) when moving through the self-calibration induction unit (4).
7. A magnetostrictive level gauge sensor having a self-calibration function according to claim 1, characterized in that: and one or more self-calibration induction units (4) can be arranged inside the sensor shell and are connected with the electronic measurement unit (2) through cables, and when the magnetic floating ball (6) passes by, one or more magnetic signals can be formed, so that one-point or multi-point calibration is realized, and the self-calibration function of the sensor is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920190238.3U CN210513344U (en) | 2019-02-12 | 2019-02-12 | Magnetostrictive liquid level meter sensor with self-calibration function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920190238.3U CN210513344U (en) | 2019-02-12 | 2019-02-12 | Magnetostrictive liquid level meter sensor with self-calibration function |
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| CN210513344U true CN210513344U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457832A (en) * | 2020-05-18 | 2020-07-28 | 上海凯佛自动化仪表有限公司 | Lifting type magnetostrictive displacement transmitter |
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2019
- 2019-02-12 CN CN201920190238.3U patent/CN210513344U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457832A (en) * | 2020-05-18 | 2020-07-28 | 上海凯佛自动化仪表有限公司 | Lifting type magnetostrictive displacement transmitter |
| CN111457832B (en) * | 2020-05-18 | 2021-06-29 | 上海凯佛自动化仪表有限公司 | Lifting type magnetostrictive displacement transmitter |
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