Electromagnetic pressure measuring device and pressure measuring method

Abstract

The present invention relates to an electromagnetic pressure measuring device and a pressure measurement method. The device includes a power supply, a control sensing display system, a protective shell, a limit sensor, and an electromagnet. An electric wire is connected between the power supply and the control sensing display system, a displacement information wire is connected between the control sensing display system and the limit sensor, and an electromagnetic control wire is connected between the control sensing display system and the electromagnet. A protective film is connected to the top of the protective shell, and permanent magnet protection brackets are connected to the left and right sides of the bottom of the protective film. A permanent magnet is connected between the two permanent magnet protection brackets. The permanent magnet protection brackets are provided with grooves. The limit sensor is located within the groove with a gap between the limit sensor and the groove. The electromagnet is connected to the bottom surface of the protective shell. The device combines limit sensing technology, magnetic levitation technology, and electromagnetic control technology. By repeatedly controlling the tiny displacement of the permanent magnet and the permanent magnet protection bracket, it achieves accurate pressure measurement.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure measurement, and in particular relates to an electromagnetic pressure measuring device and a pressure measuring method. Background Art

[0002] Pressure is a critical parameter in industrial production and engineering construction. The measurement accuracy and range of pressure measurement devices are directly related to production safety and product quality. Currently, numerous pressure measurement methods exist, categorized by their signal conversion principles: liquid column pressure measurement, elastic pressure measurement, electrical pressure measurement, and piston pressure measurement. The most commonly used of these methods is elastic pressure measurement, which utilizes an elastic element as a pressure sensor to convert a pressure signal into its displacement or force. This method offers advantages such as simple structure, ease of use, low cost, and wide application. However, elastic pressure measurement can only measure static pressure and can only compromise between accuracy and measurement range: high accuracy results in a narrow measurement range, while a wide measurement range results in reduced accuracy. Furthermore, elastic pressure measurement requires deformation, and in the field of engineering measurement, excessive deformation can compromise measurement accuracy. Therefore, there is an urgent need to develop a new elastic pressure measurement device that can meet the requirements of pressure measurement while maintaining minimal deformation or displacement of the measuring surface, further improving measurement accuracy and increasing the measurement range. Summary of the Invention

[0003] The object of the present invention is to provide an electromagnetic pressure measuring device and a pressure measuring method to solve the technical problem in the prior art that elastic pressure measuring devices cannot achieve both measurement accuracy and measurement range width.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] An electromagnetic pressure measuring device is provided, comprising a power supply, a control sensing and display system, and a protective shell, wherein an electric wire is connected between the power supply and the control sensing and display system, and the control sensing and display system is also respectively connected to a displacement information wire and an electromagnetic control wire, a protective film is fixedly connected to the top of the protective shell, and symmetrically arranged permanent magnet protection brackets are fixedly connected to the left and right sides of the bottom end of the protective film, a permanent magnet is fixedly connected between the two permanent magnet protection brackets, and grooves are provided on the two permanent magnet protection brackets, a limit sensor that cooperates with the groove is fixedly connected to the inside of the protective shell, a gap is left between the limit sensor and the groove, an electromagnet is fixedly connected to the bottom surface of the protective shell, the end of the displacement information wire facing away from the control sensing and display system is connected to the limit sensor, and the end of the electromagnetic control wire facing away from the control sensing and display system is connected to the electromagnet.

[0006] The material of the protective shell is a high-strength non-magnetic material, the outer surface of the protective shell is coated with an anti-corrosion and waterproof material, and the inner surface of the protective shell is smooth.

[0007] The material of the protective film is a high-strength fiber film or a high-strength plastic film, and the protective film is elastic.

[0008] The protective film is bonded or hot-pressed on the top of the protective shell.

[0009] The left and right ends of the permanent magnet are bonded or hot-pressed on the permanent magnet protection bracket.

[0010] The material of the permanent magnet protection bracket is a high-strength non-magnetic material, and the portion of the permanent magnet protection bracket close to the protection shell is smoothly arranged.

[0011] The permanent magnet is in the shape of a cylinder with a semicircular end.

[0012] The electromagnet is in the shape of a groove with a downward depression in the middle.

[0013] The limit sensor is a non-contact displacement sensor.

[0014] The present invention also provides a method for measuring pressure using an electromagnetic pressure measuring device, the method comprising the following steps:

[0015] (1) Install the pressure measuring device at the location where pressure measurement is required, so that the pressure part to be measured contacts the protective film of the pressure measuring device. Turn on the power supply, and after the control sensor display system outputs a stable value, reset the value to zero.

[0016] (2) When the pressure at the pressure part to be measured changes, the protective film is deformed by the force, and the protective film drives the permanent magnet protection bracket and the permanent magnet to produce a slight downward displacement.

[0017] (3) The control sensing display system collects the displacement information transmitted by the limit sensor through the displacement information wire, and uses the electromagnetic control wire to increase the magnetic force of the electromagnet, so as to cause the permanent magnet and the permanent magnet protection bracket to return to the equilibrium position.

[0018] (4) The limit sensor collects information about the equilibrium position and transmits this information to the control sensor display system. The control sensor display system stabilizes the current of the electromagnet through the electromagnetic control wire. The stable measurement value output by the control sensor display system is the current pressure value.

[0019] The beneficial effects of the present invention are as follows: (1) The structure is simple. By arranging a limit sensor, a permanent magnet and an electromagnet in the shell, the limit sensor is combined with the control sensor display system to accurately control the current of the electromagnet, thereby adjusting the magnetic force of the electromagnet. When the magnetic force of the electromagnet increases, the electromagnet causes the permanent magnet to produce an upward displacement, thereby resetting the permanent magnet, so as to ensure that the positions of the permanent magnet, the permanent magnet protection bracket and the protective film relative to the protective shell and the electromagnet are relatively fixed, ensuring that the relative position of the measuring surface is consistent with the initial position when the measurement is completed, avoiding the measurement error caused by elastic deformation, not only realizing the adjustment of microcurrent and increasing the width of the measurement range, but also improving the measurement accuracy, effectively solving the technical problem that the measurement range width and measurement accuracy of the traditional elastic pressure measuring device cannot be achieved at the same time; (2) The present invention monitors the displacement information by arranging a limit sensor, thereby improving the accuracy of the relative fixed position of the permanent magnet and the permanent magnet protection bracket, thereby improving the accuracy of the electromagnet control and reducing the pressure measurement error caused by the measurement accuracy; (3) The present invention adopts electromagnet technology and magnetic levitation technology, which can be widely used in high temperature, high pressure, humid and underwater environments, expanding the application range of pressure measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure numerals: 1—power supply, 2—electrical wire, 3—control sensing display system, 4—displacement information wire, 5—electromagnetic control wire, 6—protective shell, 7—protective film, 8—permanent magnet protection bracket, 9—permanent magnet, 10—groove, 11—limit sensor, 12—electromagnet. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "up", "down", "top", "bottom", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0024] like Figure 1 As shown, the electromagnetic pressure measuring device of the present invention includes a power supply 1, a control sensor display system 3, and a protective shell 6. The material of the protective shell 6 is a high-strength non-magnetic material, and the compressive strength of the protective shell 6 is 60kg / m 2As described above, the outer surface of the protective shell 6 is coated with anti-corrosion and waterproof materials, and the inner surface of the protective shell 6 is smoothed. An electric wire 2 is connected between the power supply 1 and the control sensor display system 3. The control sensor display system 3 is also connected to a displacement information wire 4 and an electromagnetic control wire 5, respectively. The control sensor display system 3 can adopt a servo control system in the prior art. The control sensor display system 3 is a pressure, current and voltage monitoring recorder with a model number of MIK-R200D manufactured by Hangzhou Meikong Automation Technology Co., Ltd. The control sensor display system 3 has the function of processing the information transmitted by the limit sensor 11, and can regulate the output current of the electromagnet 12, and can display real-time pressure. A protective film 7 is fixedly connected to the top of the protective shell 6. The material of the protective film 7 can be a high-strength fiber film or a high-strength plastic film. The compressive strength of the protective film 7 is 45kg / m 2 The above can withstand great pressure, and the protective film 7 is elastic and will deform under pressure. The protective film 7 is bonded or hot-pressed on the top of the protective shell 6, and the left and right sides of the bottom of the protective film 7 are fixedly connected with symmetrically arranged permanent magnet protection brackets 8. The material of the permanent magnet protection bracket 8 is a high-strength non-magnetic material. The part of the permanent magnet protection bracket 8 close to the protective shell 6 is surface-smoothed. A permanent magnet 9 is fixedly connected between the two permanent magnet protection brackets 8. The left and right ends of the permanent magnet 9 are bonded or hot-pressed on the permanent magnet protection bracket 8. The shape of the permanent magnet 9 is a cylinder with a semicircular end, but the shape of the permanent magnet 9 is not limited to this. It can also be a cylinder, a cube or a sphere. The permanent magnet protection bracket 8 is located inside the protective shell 6. A groove 10 is provided on both permanent magnet protection brackets 8. The left and right sides of the upper part of the protective shell 6 are fixedly connected with symmetrically arranged limit sensors 1. 1. The limit sensor 11 is a non-contact displacement sensor, but its form is not limited to non-contact displacement. The technical solution of the present invention can also be implemented by using a contact displacement sensor, a laser displacement sensor, an optical fiber displacement sensor, or a photoelectric displacement sensor. The limit sensor 11 is located in the groove 10 and a gap is left between it and the groove 10. An electromagnet 12 is fixedly connected to the bottom surface of the interior of the protective shell 6. The shape of the electromagnet 12 is a groove with a downward depression in the middle. However, the shape of the electromagnet 12 is not limited to a groove with a downward depression in the middle. It can also be a cylinder or a cube. The end of the displacement information wire 4 facing away from the control sensor display system 3 is connected to the limit sensor 11, and the end of the electromagnetic control wire 5 facing away from the control sensor display system 3 is connected to the electromagnet 12. The power supply 1, the permanent magnet 9, the limit sensor 11, and the electromagnet 12 are all conventional designs. The electric wire 2, the displacement information wire 4, and the electromagnetic control wire 5 can be conventional wires in the existing technology. Therefore, the specific structure will not be described in detail.

[0025] The method for measuring pressure using the electromagnetic pressure measuring device provided by the present invention comprises the following steps:

[0026] (1) Install the pressure measuring device at the location where pressure measurement is required, so that the pressure portion to be measured contacts the protective film 7 of the pressure measuring device. Turn on the power supply 1. After the control sensor display system 3 outputs a stable value, reset the value to zero.

[0027] (2) When the pressure at the pressure part to be measured changes, the protective film 7 is deformed by the force, and the protective film 7 drives the permanent magnet protection bracket 8 and the permanent magnet 9 to produce a slight downward displacement.

[0028] (3) The control sensing display system 3 collects the displacement information transmitted by the limit sensor 11 through the displacement information wire 4, and uses the electromagnetic control wire 5 to increase the magnetic force of the electromagnet 12, so as to cause the permanent magnet 9 and the permanent magnet protection bracket 8 to return to the equilibrium position.

[0029] (4) The limit sensor 11 collects information about the equilibrium position and transmits this information to the control sensor display system 3. The control sensor display system 3 stabilizes the current of the electromagnet 12 through the electromagnetic control wire 5. The stable measurement value output by the control sensor display system 3 is the current pressure value.

[0030] Working principle of the present invention:

[0031] Under non-working conditions, the permanent magnet 9 and the permanent magnet protection bracket 8 are in a state of equilibrium under the joint action of the protective film 7 and the electromagnet 12. When pressure measurement is performed, pressure is applied above the protective film 7. Since the permanent magnet 9 and the permanent magnet protection bracket 8 and the protective film 7 are fixedly connected, the permanent magnet protection bracket 8 and the permanent magnet 9 will produce a slight downward displacement under the action of pressure. The limit sensor 11 transmits the measured displacement information to the control sensing display system 3 through the displacement information wire 4. The control sensing display system 3 controls the electromagnet through the electromagnetic control wire 5. The current of 12 increases, and the magnetic force of the electromagnet 12 increases with the increase of the current. The increase of the magnetic force of the electromagnet 12 prompts the permanent magnet 9 and the permanent magnet protection bracket 8 to produce an upward displacement, thereby restoring them to the initial equilibrium position. When they restore the initial equilibrium position, the limit sensor 11 transmits the information of the equilibrium position to the control sensing display system 3 through the displacement information wire 4. The control sensing display system 3 stabilizes the current of the electromagnet 12 through the electromagnetic control wire 5, and at the same time, the control sensing display system 3 gives a stable current pressure value.

[0032] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. An electromagnetic pressure measuring device, characterized in that: The invention comprises a power supply, a control sensing display system, and a protective shell. An electric wire is connected between the power supply and the control sensing display system. The control sensing display system is also respectively connected to a displacement information wire and an electromagnetic control wire. A protective film is fixedly connected to the top of the protective shell. The left and right sides of the bottom of the protective film are fixedly connected to symmetrically arranged permanent magnet protection brackets. A permanent magnet is fixedly connected between the two permanent magnet protection brackets. Both permanent magnet protection brackets are provided with grooves. A limit sensor that cooperates with the groove is fixedly connected to the inside of the protective shell. A gap is left between the limit sensor and the groove. An electromagnet is fixedly connected to the bottom surface of the protective shell. The end of the displacement information wire facing away from the control sensing display system is connected to the limit sensor, and the end of the electromagnetic control wire facing away from the control sensing display system is connected to the electromagnet. The material of the protective shell is high-strength non-magnetic material, the outer surface of the protective shell is coated with anti-corrosion and waterproof material, and the inner surface of the protective shell is smooth. The material of the protective film is high-strength fiber film or high-strength plastic film, and the protective film is elastic.

2. The electromagnetic pressure measuring device according to claim 1, characterized in that: The protective film is bonded or hot-pressed on the top of the protective shell.

3. The electromagnetic pressure measuring device according to claim 1, wherein: The left and right ends of the permanent magnet are bonded or hot-pressed on the permanent magnet protection bracket.

4. The electromagnetic pressure measuring device according to claim 1, wherein: The material of the permanent magnet protection bracket is a high-strength non-magnetic material, and the portion of the permanent magnet protection bracket close to the protection shell is smoothly arranged.

5. The electromagnetic pressure measuring device according to any one of claims 1 to 4, characterized in that: The permanent magnet is in the shape of a cylinder with a semicircular end.

6. The electromagnetic pressure measuring device according to any one of claims 1 to 4, characterized in that: The electromagnet is in the shape of a groove with a downward depression in the middle.

7. The electromagnetic pressure measuring device according to any one of claims 1 to 4, characterized in that: The limit sensor is a non-contact displacement sensor.

8. A method for measuring pressure using the electromagnetic pressure measuring device according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Install the pressure measuring device at the location where pressure measurement is required, so that the pressure part to be measured contacts the protective film of the pressure measuring device. Turn on the power supply, and after the control sensor display system outputs a stable value, reset the value to zero. (2) When the pressure at the pressure part to be measured changes, the protective film is deformed by the force, and the protective film drives the permanent magnet protection bracket and the permanent magnet to produce a slight downward displacement; (3) The control sensing display system collects the displacement information transmitted by the limit sensor through the displacement information wire, and uses the electromagnetic control wire to increase the magnetic force of the electromagnet, so as to cause the permanent magnet and the permanent magnet protection bracket to return to the equilibrium position; (4) The limit sensor collects information about the equilibrium position and transmits this information to the control sensor display system. The control sensor display system stabilizes the current of the electromagnet through the electromagnetic control wire. The stable measurement value output by the control sensor display system is the current pressure value.

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