High-temperature-resistant and high-voltage-resistant displacement sensor suitable for magnetic field environment
By using ceramic or nickel-based alloy materials and rear-end circuit devices, the problem of instability of existing displacement sensors in high temperature, high pressure and magnetic field environments is solved, and higher stability and measurement accuracy are achieved.
Patent Information
- Application Number
- CN202420871274.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-04-25
AI Technical Summary
Existing displacement sensors are unstable in high temperature, high pressure and magnetic field environments and are susceptible to environmental impacts, resulting in reduced measurement accuracy and equipment failure.
A high-temperature and high-voltage displacement sensor suitable for magnetic field environments is designed, and ceramic or nickel-based alloy materials are used to avoid environmentally-influenced electronic components such as resistance, capacitor and inductor. The rear-end circuit device is used to measure the displacement through the voltage changes of resistors A and B.
The sensor shows higher stability and reliability in high temperature, high pressure and magnetic field environments, and the measurement results are more accurate, and are suitable for experimental use with strict environmental requirements.
Smart Images
Figure CN223005488U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of linear displacement sensor devices, and specifically provides a high-temperature and high-voltage displacement sensor applicable to a magnetic field environment. Background Technique
[0002] With the continuous development of the economic society, the industrialization process in China has been accelerating, and the demand for displacement sensors is also increasing. At the same time, it is also required that displacement sensors continuously carry out technological innovation and use new technologies and new materials to meet the needs of different occasions and different environmental conditions, thus bringing new challenges. In extreme environments, we must consider the impact of the environment on the materials of displacement sensors to ensure that it will not have too much impact on the working conditions of displacement sensors. Currently, we will discuss the environments of high temperature, high voltage, and magnetic field. The high-temperature, high-voltage, and magnetic field environments have a great impact on electronic components. High temperature will increase the resistance value, making the dielectric inside the capacitor more likely to break down. Based on the working principles, the displacement sensors currently on the market can be divided into potentiometric displacement sensors, magnetostrictive displacement sensors, etc.
[0003] 1. The potentiometric displacement sensor converts mechanical displacement into a resistance or voltage output that is linear or has an arbitrary functional relationship with it through a potentiometer element. Ordinary linear potentiometers and circular potentiometers can be used as linear displacement and angular displacement sensors respectively. However, for a potentiometer designed to measure displacement, a definite relationship is required between the displacement change and the resistance change. The movable brush of the potentiometric displacement sensor is connected to the object to be measured. The displacement of the object causes a change in the resistance of the movable end of the potentiometer. The amount of change in the resistance value reflects the magnitude of the displacement, and whether the resistance value increases or decreases indicates the direction of the displacement. Usually, a power supply voltage is applied to the potentiometer to convert the resistance change into a voltage output. However, usually, the higher the temperature of a metal conductor, the greater the resistance; the lower the temperature, the smaller the resistance.
[0004] 2. The magnetostrictive displacement sensor measures the actual displacement value of the product to be detected by accurately detecting the absolute position of the moving magnetic ring through an internal non-contact measurement and control technology. It utilizes the magnetostrictive principle and generates a strain pulse signal through the intersection of two different magnetic fields to accurately measure the position. The measuring element is a waveguide, and the sensitive element inside the waveguide is made of a special magnetostrictive material. The measuring process is that an electric current pulse is generated in the electronic chamber of the sensor. This electric current pulse is transmitted in the waveguide, thereby generating a circumferential magnetic field outside the waveguide. When this magnetic field intersects with the magnetic field generated by the moving magnetic ring used as the position change sleeved on the waveguide, due to the magnetostrictive effect, a strain mechanical wave pulse signal will be generated inside the waveguide. This strain mechanical wave pulse signal is transmitted at a fixed sound speed and is quickly detected by the electronic chamber.
[0005] The transmission time of this strain mechanical wave pulse signal in the waveguide is proportional to the distance between the moving magnetic ring and the electronic chamber. By measuring the time, this distance can be determined with high precision. Since the output signal is a true absolute value, rather than a proportional or amplified signal, there is no signal drift or variation, and there is no need for regular recalibration.
[0006] However, the magnetostrictive displacement sensor has slightly poor anti-interference ability and is generally not recommended for use in places with strong electromagnetic radiation such as power plants. Utility Model Content
[0007] To overcome the above-mentioned existing technical deficiencies, the present utility model provides a displacement sensor that can be applied to extreme environments. This sensor avoids using electronic components such as resistors, capacitors, and inductors at the front end that are vulnerable to environmental influences, thereby making the measurement of the displacement sensor more stable.
[0008] The present utility model can be achieved through the following technical solutions:
[0009] A high-temperature and high-voltage displacement sensor applicable to a magnetic field environment, comprising a housing device, a slider device, a base device, a probe A device, a probe B device, and a rear-end circuit device. It is characterized in that the housing base screw cooperates with the threaded holes at the bottom of the base to fix the housing device and the base device together; the slider device and the base device are fitted together through the sliding grooves of the slider and the guide rails on both sides of the base to ensure that the probe A device and the probe B device slide parallel on the base device; the probe housings of the probe A device and the probe B device are placed at the through holes of the slider, and then gaskets are stacked on the probe housings. The probe fixing screws cooperate with the threaded holes on the slider to connect and fix the three together, so that the probe A device and the probe B device are fixed on the slider device.
[0010] Further, four through holes extend from the bottom of the housing in the housing device for four external screws to fix the housing and the placement table together, and four through holes on the lid are for four fixing screws to fix the lid and the housing together; a threaded jack extending from the lid is for the positive electrode plug to be inserted to ensure the access of the positive power supply, and the positive electrode nut cooperates with the thread on the jack to make the positive electrode plug contact the conductor block.
[0011] Further, the slider device is assembled from probe wires, a slider, slider screws, an external slider fixing block, and external screws; there is a threaded hole on the side of each of the two pull rods extending from the slider for two slider screws to fix the external slider fixing block and the slider together; there are four through holes at the bottom of the external slider fixing block for four external screws to fix the external slider fixing block and the object to be measured together.
[0012] Further, after the serrations of the first ceramic block and the second ceramic block in the base device are combined and spliced with the grooves of the conductor block, they are placed in the grooves of the base; the protruding joint part of the conductor block is inserted into the threaded jacks protruding from the lid and contacts the positive electrode plug on the other side of the lid.
[0013] Further, in the probe housings of the probe A device and the probe B device, the overall assembly of the spring, the probe base and the probe is placed successively, and then the gasket is covered. The two probe fixing screws pass through the through holes on the gasket and the probe housing and cooperate with the screw holes on the slider, and the probe adjusting screw cooperates with the screw holes on the gasket; by adjusting the probe adjusting screw, the deformation of the spring is increased, thereby increasing the elastic force on the probe base, so that the probe contacts the base device; the probe wire is welded at the interface of the gasket, so that the internal circuit of the sensor forms a loop, and the on-off signals of the probe A device and the probe B device can be output.
[0014] Further, the rear-end circuit device is composed of a power supply, a resistor A and a resistor B connected together; when the rear-end circuit device starts to be used, the displacement value can be obtained only after measuring the voltages at both ends of the resistor A and the resistor B and through comparison and calculation.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] 1. The structure of the present utility model is simple, the volume is small, and it is convenient for integration and multi-function.
[0017] 2. Except for the rear-end circuit device part, the present utility model is composed of ceramic or nickel-based alloy materials, without resistors, capacitors, inductors, etc. Therefore, it can adapt to magnetic field environments, high-temperature and high-pressure environments, and can be used for experiments with harsh environmental requirements. Description of the Drawings
[0018] Figure 1 Isometric view of the whole device
[0019] Figure 2 Isometric view of the whole inside of the device
[0020] Figure 3 Exploded view of the housing device
[0021] Figure 4 Exploded view of the slider device
[0022] Figure 5 Exploded view of the base device
[0023] Figure 6 Exploded view of the probe device
[0024] Figure 7 External installation drawing
[0025] Figure 8Circuit diagram for the backend device Detailed implementation
[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0027] A displacement sensor applicable to high temperature, high pressure and high magnetic fields is composed of a housing device 1, a slider device 2, a base device 3, a probe A device 4, a probe B device 5 and a backend circuit device 33, as shown in the figure.
[0028] The housing device 1 is composed of a housing 6, external screws 7, housing base screws 8, lid fixing screws 9, a positive electrode nut 10, a positive electrode plug 11 and a lid 12. The housing 6 and the lid 12 are connected together by four lid fixing screws 9. Four squares with circular holes protruding from both sides of the housing 6 are connected to a placement table 28 through external screws 7. The housing base screws 8 fix the internal base 18 and the housing 6 together through two circular holes at the bottom of the housing 6. The positive electrode plug 11 is inserted into the single-pole power jack protruding from the lid 12 and connected to the internal conductor block 20. The wire at the rear end of the positive electrode plug 11 will pass through the positive electrode nut 10 and be connected to the positive electrode of the power supply 30. The positive electrode nut 10 cooperates with the single-pole power jack protruding from the lid 12 to fix the positive electrode plug 11 on the lid 12.
[0029] The slider device 2 is composed of a probe wire 13, a slider 14, slider screws 15, an external slider fixing block 16 and external screws 7. The probe wire 13 passes through the internal hollow channel of the slider 14, with one end connected to a gasket 22 and the other end connected to a resistor and then connected to the negative electrode of the power supply 30. The external slider fixing block 16 is sleeved on the rod of the slider 14, and the two slider screws 15 fix them together from the side. Four external screws 7 pass through the four circular holes at the bottom of the external slider fixing block and are connected to an external measuring object 29. The slider 14 cooperates with the card slot of the base 18. When the external measuring object 29 moves, it will apply a pulling force to the slider 14, causing the slider 14 to slide on the base 18.
[0030] The base device 3 is composed of a first ceramic block 17, a base 18, a second ceramic block 19 and a conductor block 20. The ceramic block 17, the second ceramic block 19 and the conductor block 20 are assembled together and placed in the slot of the base 18.
[0031] The structures of the described probe A device 4 and probe B device 5 are exactly the same, and they are composed of a probe adjustment screw 21, a probe fixing screw 22, a gasket 23, a probe base 24, a probe head 25, a spring 26, and a probe housing 27. First, place the spring 26 into the probe housing 27, and then fit the probe base 24 and the probe head 25 together and put them into the probe housing 27. The gasket 23 covers the probe housing 27, and align the two holes on the gasket 23 with the two holes on the probe housing 27, and let the probe fixing screw 22 pass through the holes and connect to the slider 14. The probe adjustment screw 21 cooperates with the gasket 23. When it is adjusted downward, its bottom contacts the probe base 24 and applies pressure. Through the contact between the probe base 24 and the spring 26, this pressure will also be transmitted to the spring 26, and the spring 26 will correspondingly give an upward elastic force to the probe base 24. To make the probe head 25 in good contact with the base device 3, the base device 3 will surely give a certain supporting force to the probe head 25, and this force will also be transmitted to the probe base 24. Therefore, by adjusting the probe adjustment screw 21, the probe base 24 can be in a certain good balance state and in good contact with the base device 3.
[0032] The described rear-end circuit device 33 is composed of a resistor A 31, a resistor B 32, and a power supply 30. The voltage of the power supply 30 is 12V, and the resistance values of both the resistor A 31 and the resistor B 32 are 1kΩ. The gasket 23 on the probe A device 4 is connected in series with the resistor A 31 through the probe wire 13 and then connected to the negative pole of the power supply 30. The gasket 23 on the probe B device 5 is connected in series with the resistor B 32 through the probe wire 13 and then connected to the negative pole of the power supply 30. The wire at the rear end of the positive plug 11 is connected to the positive pole of the power supply 30.
[0033] The result of the displacement requires testing the voltages of resistor A and resistor B. Set the situation of no voltage to 0 and the situation of having voltage to 1. Set the state of probe A as A and the next state as A*. Set the state of probe B as B and the next state as B*. When the moving direction of the probe is the positive direction, AB will cycle as 00→01→11→10→00; when the moving direction of the probe is the negative direction, AB will cycle as 00→10→11→01→00. If there are situations of 00→11, 01→10, 10→01, 11→00, it indicates that there is a problem with the sensor and the operation needs to be stopped and the device checked. If there are situations of 00→00, 01→01, 10→10, 11→11, it means that the probe remains unchanged and the object to be measured stops moving. However, if the states of probe A and probe B do not change simultaneously, it indicates that there is a problem inside the sensor, and there may be a problem of poor contact. When moving in the positive direction, the displacement increases by one unit each time the AB state changes; correspondingly, when moving in the negative direction, the displacement decreases by one unit each time the AB state changes. The width of each sawtooth on the first ceramic block 17, the second ceramic block 19, and the conductor block 20 is one unit, and in this utility model, one unit is designed as 2 millimeters. The error is the same as the sawtooth width, which is ±2 millimeters.
[0034] The above shows and describes the basic principles, main features, and advantages of the present disclosure. Those skilled in the art of this industry should understand that the present disclosure is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure will have various changes and improvements, and these changes and improvements all fall within the scope of the present disclosure claimed.
Claims
1. A high temperature resistant high voltage displacement sensor suitable for use in a magnetic field environment, comprising a housing device (1), a slider device (2), a base device (3), a probe A device (4), a probe B device (5), and a back-end circuit device (33), characterized in that: The housing base screw (8) cooperates with the threaded hole at the bottom of the base (18) to fix the housing device (1) and the base device (3) together; the slider device (2) and the base device (3) cooperate with the guide rails on both sides of the base (18) through the sliding groove of the slider (14) to ensure that the probe A device (4) and the probe B device (5) slide in parallel on the base device (3); the probe housing (27) of the probe A device (4) and the probe B device (5) is placed at the through hole of the slider (14), and then the gasket (23) is stacked on the probe housing (27), and the probe fixing screw (22) cooperates with the threaded hole on the slider (14) to connect and fix the three together, so that the probe A device (4) and the probe B device (5) are fixed on the slider device (2).
2. The high temperature resistant and high voltage displacement sensor suitable for use in a magnetic field environment according to claim 1, characterized in that: The shell (6) in the shell device (1) has four through holes extending from the bottom thereof for four external screws (7) to fix the shell (6) and the placement table (28) together, and the four through holes on the cover (12) are provided for four fixing screws (9) to fix the cover (12) and the shell (6) together; the threaded socket extending from the cover (12) is provided for the positive plug (11) to be inserted to ensure the access of the positive power supply, and the positive nut (10) cooperates with the thread on the socket so that the positive plug (11) contacts the conductor block (20).
3. The high temperature resistant and high voltage displacement sensor suitable for use in a magnetic field environment according to claim 1, characterized in that: The slider device (2) is assembled from a probe wire (13), a slider (14), a slider screw (15), a slider external fixing block (16) and an external screw (7); the two pull rods extending from the slider (14) have a threaded hole on their sides respectively, for two slider screws (15) to fix the slider external fixing block (16) and the slider (14) together; the bottom of the slider external fixing block (16) has four through holes, for four external screws (7) to fix the slider external fixing block (16) and the object to be measured (29) together.
4. The high temperature resistant and high voltage displacement sensor suitable for use in a magnetic field environment according to claim 1, characterized in that: The saw teeth of the first ceramic block (17) and the second ceramic block (19) in the base device (3) are combined and spliced with the groove of the conductor block (20), and then placed in the groove of the base (18); the connector part extending from the conductor block (20) is inserted into the threaded socket extending from the cover (12), and connected with the positive plug on the other side of the cover (12). (11) Contact.
5. The high temperature resistant and high voltage displacement sensor suitable for use in a magnetic field environment according to claim 1, characterized in that: The probe housing (27) of the probe A device (4) and the probe B device (5) is successively placed with a spring (26), a probe base (24) and a probe (25) as a whole, and then covered with a gasket (23). Two probe fixing screws (22) pass through the gasket (23) and the through holes on the probe housing (27) and the screw holes on the slider (14), and the probe adjusting screw (21) cooperates with the screw hole on the gasket (23); by adjusting the probe adjusting screw (21), the deformation of the spring (26) is increased, thereby increasing its elastic force on the probe base (24), so that the probe (25) contacts the base device (3); the probe wire (13) is welded at the interface of the gasket, so that the circuit in the sensor forms a loop, and the on-off signals of the probe A device (4) and the probe B device (5) can be output.
6. The high temperature resistant and high voltage displacement sensor suitable for use in a magnetic field environment according to claim 1, characterized in that: The back-end circuit device (33) is formed by connecting a power supply (30), a resistor A (31) and a resistor B (32).