Wind pressure sensor
By using a photoelectric sensor in a wind pressure sensor to detect the displacement distance of the diaphragm, combined with the design of push plate and pressure spring, the problem of the core self-weight affecting data accuracy is solved, and higher detection accuracy and accuracy are achieved.
Patent Information
- Application Number
- CN202420850288.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The self-weight of the magnetic core in the wind pressure sensor affects the true displacement data of the diaphragm inaccurate, resulting in the accuracy of the output data being affected.
The photoelectric sensor is used to detect the displacement distance of the diaphragm. By fixing the push plate and the pressure spring on the diaphragm, the photoelectric sensor is used to detect the pressure spring at the end away from the push plate, which avoids interference with the data output by the core self-weight, and Online pressure regulating calibration is performed through software data algorithm, and the mechanical calibration structure is cancelled.
The detection accuracy of the wind pressure sensor is improved, the influence of mechanical errors and system errors is avoided, and the accuracy of data output is ensured.
Smart Images
Figure CN222188625U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wind pressure sensors, and in particular to a wind pressure sensor. Background Art
[0002] Wind pressure sensors are widely used in various industrial automatic control environments. They use air pressure to directly act on the diaphragm of the sensor to cause the diaphragm to move. Specifically, the diaphragm will produce a displacement proportional to the medium pressure, causing the induction of the coil to change. The electronic circuit detects this change and converts and outputs a corresponding standard signal to detect the change in wind pressure.
[0003] At present, most wind pressure sensors are equipped with a magnetic core. The pressure change pushes the diaphragm and the diaphragm bracket to move, causing the magnetic core to move longitudinally in the magnetic core channel. The coil is arranged on the outside of the magnetic core channel, causing the magnetic core to move on the inside of the coil, causing the output signal of the circuit board to change, and after being amplified by the amplifier circuit on the circuit board, the detection signal is output; however, the magnetic core itself has a certain weight, so when the magnetic core is fixed on the diaphragm bracket and the pressure change pushes the diaphragm down, the moving distance of the diaphragm will be affected by the weight of the magnetic core, affecting the accuracy of the output data. Summary of the invention
[0004] The embodiment of the present application provides a wind pressure sensor to solve the problem in the related art that, due to the magnetic core disposed in the wind pressure sensor, the actual displacement data of the diaphragm is inaccurate due to the self-weight of the magnetic core, thus affecting the accuracy of the output data.
[0005] The present application provides a wind pressure sensor, including:
[0006] A diaphragm, a push plate is fixedly arranged on the diaphragm, and a pressure spring is arranged on one side of the push plate;
[0007] A photoelectric sensor is fixedly arranged at one end of the pressure spring away from the push plate, and is used to detect the displacement distance of the diaphragm.
[0008] In some embodiments, a circuit board assembly is further included, and the photoelectric sensor is connected to the circuit board assembly to transmit the displacement distance data of the diaphragm to the circuit board assembly.
[0009] In some embodiments, a boss for positioning the pressure spring is protruded from one side of the push plate close to the pressure spring.
[0010] In some embodiments, it also includes an upper shell and a lower shell connected to the upper shell, the upper shell is provided with an upper air intake pipe, the lower shell is provided with a lower air intake pipe, and one end of the pressure spring away from the push plate abuts against the lower shell.
[0011] In some embodiments, the circuit board assembly is snap-fitted and fixed to the lower housing, a snap-fit block is protruding from the bottom of the lower housing, and a fixing groove matching the snap-fit block is provided on the circuit board assembly.
[0012] In some embodiments, a bottom cover is detachably provided at the bottom of the lower shell, a snap-in section is protruding from one end of the circuit board assembly, and a snap-in groove matching the snap-in section is provided on the bottom cover.
[0013] In some embodiments, a circular arc opening for avoiding the lower shell is provided on one side of the circuit board assembly.
[0014] In some embodiments, an annular space for limiting the pressure spring is provided in the lower shell.
[0015] In some embodiments, an arc-shaped chamfer is provided at the edge of the end of the bottom cover.
[0016] In some embodiments, a fixing bracket is detachably provided on the lower shell, and the fixing bracket is in an "L" shape. The fixing bracket includes a first connecting plate connected to the lower shell and a second connecting plate vertically arranged on the first connecting plate, and bolt holes are provided on the first connecting plate and the second connecting plate.
[0017] The beneficial effects of the technical solution provided by this application include:
[0018] An embodiment of the present application provides a wind pressure sensor, including a diaphragm and a photoelectric sensor, wherein a push plate is fixedly arranged on the diaphragm, and a pressure spring is arranged on one side of the push plate; the photoelectric sensor is fixedly arranged at one end of the pressure spring away from the push plate, and is used to detect the displacement distance of the diaphragm.
[0019] In actual use, the displacement distance of the push plate can be detected by using a photoelectric sensor. Since the push plate is fixed to the diaphragm, the displacement distance of the diaphragm itself can be indirectly detected by the photoelectric sensor. A pressure spring is provided on one side of the push plate. The pressure spring is used to automatically reset the diaphragm and the push plate after being pushed by the medium. The photoelectric sensor is fixedly arranged at one end of the pressure spring away from the push plate. This arrangement replaces the original method of outputting signals using a magnetic core and a coil. The magnetic core is arranged on the push plate, so that when the medium pressure pushes the diaphragm and the push plate to move, it will be disturbed by the weight of the magnetic core, thereby affecting the accuracy of the data output. The present application uses a photoelectric sensor to detect the displacement distance of the diaphragm. The photoelectric sensor is not arranged on the same side of the diaphragm, so the self-weight of the photoelectric sensor will not interfere with the displacement distance of the diaphragm itself, thereby ensuring the accuracy of the data output. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 It is the overall schematic diagram of the wind pressure sensor;
[0022] Figure 2 is a side view of the wind pressure sensor;
[0023] Figure 3 is a cross-sectional view of a wind pressure sensor;
[0024] Figure 4 A schematic diagram of the assembly of the circuit board assembly and the lower housing;
[0025] Figure 5 is a schematic diagram of a circuit board assembly and a bottom cover;
[0026] Figure 6 Schematic diagram of push plate and pressure spring;
[0027] Figure 7 A schematic diagram of a circuit board assembly.
[0028] Reference numerals:
[0029] 1. Upper shell; 2. Lower shell; 3. Diaphragm; 4. Push plate; 5. Circuit board assembly; 6. Bottom cover; 7. Photoelectric sensor; 8. Pressure spring; 9. Fixed bracket; 11. Upper air inlet pipe; 21. Lower air inlet pipe; 22. Snap-in block; 41. Boss; 51. Fixed groove; 52. Snap-in section; 61. Snap-in groove; 91. First connecting plate; 92. Second connecting plate. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0031] The embodiment of the present application provides a wind pressure sensor, which can solve the problem in the related art that due to the provision of a magnetic core in the wind pressure sensor, the actual displacement data of the diaphragm is inaccurate due to the self-weight of the magnetic core, thus affecting the accuracy of the output data.
[0032] See also Figures 1 to 3 As shown, an embodiment of the present application provides a wind pressure sensor, including a diaphragm 3 and a photoelectric sensor 7. A push plate 4 is fixedly arranged on the diaphragm 3, and a pressure spring 8 is arranged on one side of the push plate 4; the photoelectric sensor 7 is fixedly arranged at one end of the pressure spring 8 away from the push plate 4, and is used to detect the displacement distance of the diaphragm 3.
[0033] In actual use, the displacement distance of the push plate 4 can be detected by using the photoelectric sensor 7. Since the push plate 4 is fixed to the diaphragm 3, the displacement distance of the diaphragm 3 itself can be indirectly detected by the photoelectric sensor 7. A pressure spring 8 is provided on one side of the push plate 4. The pressure spring 8 is used to automatically reset the diaphragm 3 and the push plate 4 after being pushed by the medium. The photoelectric sensor 7 is fixedly arranged at the end of the pressure spring 8 away from the push plate 4. This arrangement replaces the original method of outputting signals using a magnetic core and a coil. The magnetic core is arranged on the push plate 4, so that when the medium pressure pushes the diaphragm 3 and the push plate 4 to move, it will be disturbed by the weight of the magnetic core, thereby affecting the accuracy of the data output. However, the present application uses the photoelectric sensor 7 to detect the displacement distance of the diaphragm 3. The photoelectric sensor 7 is not arranged on the same side of the diaphragm 3, so the self-weight of the photoelectric sensor 7 will not interfere with the displacement distance of the diaphragm 3 itself, thereby ensuring the accuracy of the data output.
[0034] Specifically, Figure 3 and Figure 6 As shown, since the pressure spring 8 is hollow, the photoelectric sensor 7 is fixedly arranged at one end of the pressure spring 8 away from the push plate 4, and the photoelectric sensor 7 can be arranged in the inner circle at the bottom of the pressure spring 8 to detect the moving distance of the push plate 4. The push plate 4 is fixed together with the diaphragm 3, so the moving distance of the diaphragm 3 can be detected by the photoelectric sensor 7.
[0035] In some optional embodiments, such as Figures 3 to 5 As shown, the wind pressure sensor of the present application further includes a circuit board assembly 5, and a photoelectric sensor 7 is connected to the circuit board assembly 5, and is used to transmit the displacement distance data of the diaphragm 3 to the circuit board assembly 5. When the photoelectric sensor 7 detects the displacement distance of the push plate 4, that is, after detecting the displacement distance of the diaphragm 3, the displacement distance data of the diaphragm 3 can be transmitted to the circuit board assembly 5, and the circuit board assembly 5 processes the received displacement distance data and amplifies and outputs a standard detection signal.
[0036] The present application eliminates the mechanical calibration structure of the traditional wind pressure sensor, that is, eliminates the setting of the screw pressure regulating mechanism. The original screw pressure regulating mechanism is no longer needed to adjust the pressure spring 8. Advanced software data algorithms can be used to perform online pressure regulation calibration on the wind pressure sensor, effectively preventing the measurement data from being affected by system errors and mechanical errors, improving the detection accuracy of the wind pressure sensor, and avoiding mechanical errors caused by the nut in the mechanical calibration structure due to spring compression and the inability to release its pressure.
[0037] In some optional embodiments, such as Figure 3 and Figure 6 As shown, a boss 41 for positioning the pressure spring 8 is protruded from one side of the push plate 4 close to the pressure spring 8. The top surface of the pressure spring 8 can be arranged around the outer wall of the boss 41, and the arrangement of the boss 41 facilitates the positioning of the pressure spring 8.
[0038] In some optional embodiments, such as Figures 1 to 3 As shown, the wind pressure sensor of the present application also includes an upper shell 1 and a lower shell 2 connected to the upper shell 1, an upper air inlet pipe 11 is provided on the upper shell 1, a lower air inlet pipe 21 is provided on the lower shell 2, and one end of the pressure spring 8 away from the push plate 4 abuts against the lower shell 2. In actual use, like the original wind pressure sensor, the diaphragm 3 separates the pressure chamber into an upper pressure chamber and a lower pressure chamber, and the upper air inlet pipe 11 and the lower air inlet pipe 21 are connected to the upper pressure chamber and the lower pressure chamber respectively. When the medium enters the cavity of the sensor, the medium pressure can push the push plate 4 to drive the diaphragm 3 to move in the vertical direction in the cavity of the sensor.
[0039] In some optional embodiments, such as Figure 3 As shown, an annular space for limiting the pressure spring 8 is provided in the lower housing 2. An annular space is provided inside the lower housing 2 to limit the pressure spring 8 around and ensure the reliability of the assembly of parts.
[0040] In some optional embodiments, such as Figure 4 , Figure 5 and Figure 7 As shown, the circuit board assembly 5 is clamped and fixed to the lower housing 2, a clamping block 22 is protruding from the bottom of the lower housing 2, and a fixing groove 51 matching the clamping block 22 is provided on the circuit board assembly 5. The clamping block 22 is protruding from the bottom of the lower housing 2. In actual use, two clamping blocks 22 can be symmetrically provided along the length direction of the circuit board assembly 5, and a fixing groove 51 matching the clamping block 22 is provided on the circuit board assembly 5. The clamping block 22 is clamped in the fixing groove 51, so that the lower housing 2 fixes the circuit board assembly 5.
[0041] In some optional embodiments, such as Figure 1As shown, the bottom of the lower housing 2 is detachably provided with a bottom cover 6, one end of the circuit board assembly 5 is provided with a protruding clamping section 52, and the bottom cover 6 is provided with a clamping groove 61 matching the clamping section 52. In actual use, the circuit board assembly 5 can be clamped in the clamping groove 61 of the bottom cover 6 through the protruding clamping section 52 for assembly and fixation. In some actual use situations, an arc chamfer is provided at the edge of the end of the bottom cover 6. The setting of the arc chamfer can avoid friction damage between the bottom cover 6 and other components during assembly.
[0042] In some optional embodiments, such as Figure 5 and Figure 7 As shown, a circular arc opening is provided on one side of the circuit board assembly 5 for avoiding the lower housing 2. In actual use, the circuit board assembly 5 can be set to a "concave" shape, and a circular arc opening is provided on one side of the circuit board assembly 5 for avoiding the lower housing 2, so as to optimize the internal space layout of the sensor and avoid the sensor being too large.
[0043] In some optional embodiments, such as Figure 1 and Figure 2 As shown, a fixing bracket 9 is detachably provided on the lower housing 2, and the fixing bracket 9 is in an "L" shape. The fixing bracket 9 includes a first connecting plate 91 connected to the lower housing 2 and a second connecting plate 92 vertically arranged on the first connecting plate 91, and bolt holes are arranged on the first connecting plate 91 and the second connecting plate 92. The sensor as a whole can be fixed to external equipment by the fixing bracket 9. Specifically, the first connecting plate 91 is fixed to the lower housing 2, and the second connecting plate 92 is provided with bolt holes, which can be fixed to external equipment. The first connecting plate 91 and the second connecting plate 92 are arranged vertically, which can ensure that the sensor as a whole can be fixed to external equipment by using the fixing bracket 9 under the premise of occupying a small space.
[0044] In summary, the wind pressure sensor of the present application includes a diaphragm 3 and a photoelectric sensor 7. A push plate 4 is fixedly arranged on the diaphragm 3, and a pressure spring 8 is arranged on one side of the push plate 4; the photoelectric sensor 7 is fixedly arranged at one end of the pressure spring 8 away from the push plate 4, and is used to detect the displacement distance of the diaphragm 3.
[0045] In actual use, the displacement distance of the push plate 4 can be detected by using the photoelectric sensor 7. Since the push plate 4 is fixed to the diaphragm 3, the displacement distance of the diaphragm 3 itself can be indirectly detected by the photoelectric sensor 7. A pressure spring 8 is provided on one side of the push plate 4. The pressure spring 8 is used to automatically reset the diaphragm 3 and the push plate 4 after being pushed by the medium. The photoelectric sensor 7 is fixedly arranged at the end of the pressure spring 8 away from the push plate 4. This arrangement replaces the original method of outputting signals using a magnetic core and a coil. The magnetic core is arranged on the push plate 4, so that when the medium pressure pushes the diaphragm 3 and the push plate 4 to move, it will be disturbed by the weight of the magnetic core, thereby affecting the accuracy of the data output. However, the present application uses the photoelectric sensor 7 to detect the displacement distance of the diaphragm 3. The photoelectric sensor 7 is not arranged on the same side of the diaphragm 3, so the self-weight of the photoelectric sensor 7 will not interfere with the displacement distance of the diaphragm 3 itself, thereby ensuring the accuracy of the data output.
[0046] Specifically, since the pressure spring 8 is hollow, the photoelectric sensor 7 is fixedly arranged at one end of the pressure spring 8 away from the push plate 4, and the photoelectric sensor 7 can be arranged in the inner circle at the bottom of the pressure spring 8 to detect the moving distance of the push plate 4. The push plate 4 is fixed together with the diaphragm 3, so the moving distance of the diaphragm 3 can be detected by the photoelectric sensor 7.
[0047] The wind pressure sensor also includes a circuit board assembly 5, and a photoelectric sensor 7 is connected to the circuit board assembly 5, and is used to transmit the displacement distance data of the diaphragm 3 to the circuit board assembly 5. When the photoelectric sensor 7 detects the displacement distance of the push plate 4, that is, detects the displacement distance of the diaphragm 3, it can transmit the displacement distance data of the diaphragm 3 to the circuit board assembly 5, and the circuit board assembly 5 processes the received displacement distance data and amplifies and outputs a standard detection signal.
[0048] A boss 41 for positioning the pressure spring 8 is protruded from one side of the push plate 4 close to the pressure spring 8. The top surface of the pressure spring 8 can be arranged around the outer wall of the boss 41. The arrangement of the boss 41 facilitates the positioning of the pressure spring 8. The wind pressure sensor of the present application also includes an upper shell 1 and a lower shell 2 connected to the upper shell 1, an upper air inlet pipe 11 is arranged on the upper shell 1, a lower air inlet pipe 21 is arranged on the lower shell 2, and one end of the pressure spring 8 away from the push plate 4 abuts against the lower shell 2. In actual use, like the original wind pressure sensor, the diaphragm 3 separates the pressure chamber into an upper pressure chamber and a lower pressure chamber, and the upper air inlet pipe 11 and the lower air inlet pipe 21 are connected to the upper pressure chamber and the lower pressure chamber respectively. When the medium enters the cavity of the sensor, the medium pressure can push the push plate 4 to drive the diaphragm 3 to move in the vertical direction in the cavity of the sensor.
[0049] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0050] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0051] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. A wind pressure sensor, It is characterized in that include: A diaphragm (3), a push plate (4) being fixedly arranged on the diaphragm (3), and a pressure spring (8) being arranged on one side of the push plate (4); A photoelectric sensor (7) is fixedly arranged at one end of the pressure spring (8) away from the push plate (4) and is used to detect the displacement distance of the diaphragm (3).
2. A wind pressure sensor as claimed in claim 1, Features: It also comprises a circuit board assembly (5), and the photoelectric sensor (7) is connected to the circuit board assembly (5) and is used to transmit the displacement distance data of the diaphragm (3) to the circuit board assembly (5).
3. A wind pressure sensor as claimed in claim 1, Features: A boss (41) for positioning the pressure spring (8) is protruded from one side of the push plate (4) close to the pressure spring (8).
4. A wind pressure sensor as claimed in claim 2, Features: It also comprises an upper shell (1) and a lower shell (2) connected to the upper shell (1), the upper shell (1) being provided with an upper air intake pipe (11), the lower shell (2) being provided with a lower air intake pipe (21), and one end of the pressure spring (8) away from the push plate (4) abuts against the lower shell (2).
5. A wind pressure sensor as claimed in claim 4, Features: The circuit board assembly (5) is snap-fitted and fixed to the lower housing (2); a snap-fit block (22) is protruding from the bottom of the lower housing (2); and a fixing groove (51) matching the snap-fit block (22) is provided on the circuit board assembly (5).
6. A wind pressure sensor as claimed in claim 5, Features: The bottom of the lower housing (2) is detachably provided with a bottom cover (6), one end of the circuit board assembly (5) is protrudingly provided with a snap-fit section (52), and the bottom cover (6) is provided with a snap-fit groove (61) matching the snap-fit section (52).
7. A wind pressure sensor as claimed in claim 4, Features: A circular arc opening for avoiding the lower housing (2) is provided on one side of the circuit board assembly (5).
8. A wind pressure sensor as claimed in claim 4, Features: An annular space for limiting the pressure spring (8) is provided in the lower housing (2).
9. A wind pressure sensor as claimed in claim 6, Features: The end edge of the bottom cover (6) is provided with an arc chamfer.
10. A wind pressure sensor as claimed in claim 4, Features: A fixing bracket (9) is detachably provided on the lower shell (2), the fixing bracket (9) being in an "L" shape, and the fixing bracket (9) comprises a first connecting plate (91) connected to the lower shell (2) and a second connecting plate (92) vertically arranged on the first connecting plate (91), and bolt holes are provided on both the first connecting plate (91) and the second connecting plate (92).