Integrated multi-probe pressure sensor and pressure detection device

Abstract

The utility model discloses an integrated multi-probe pressure sensor, comprising a base plate provided with an air inlet and a plurality of mounting grooves, the air inlet is communicated with the mounting grooves through an internal air cavity; the detection assembly comprises a plurality of pressure probes, each pressure probe is correspondingly arranged in one mounting groove and is in sealed connection with the mounting groove, and the detection end of each pressure probe is communicated with the air cavity; the circuit board is fixedly arranged on one side of the foundation plate and is connected with a lead of the pressure probe; according to the utility model, errors possibly caused by single-point measurement can be effectively eliminated, the flexibility and expandability are strong, the structure is compact, the integration level is high, and leakage points and maintenance difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to an integrated multi-probe pressure sensor and a pressure detection device. Background Art

[0002] In the field of pressure measurement, traditional pressure sensors mainly rely on single-point measurement. Although this method is relatively simple to implement, its limitations are also very obvious. Single-point measurement is easily interfered by environmental factors, such as temperature fluctuations and vibrations, which may lead to deviations in measurement results. More importantly, once this single point fails, the entire measurement system may fail and cannot continue to provide accurate pressure data, which seriously affects the accuracy of the measurement and the stability of the system.

[0003] In key industries such as energy and chemicals, equipment in the production process needs to accurately collect and measure pressure, and complete the corresponding control and external output tasks at the same time. In order to ensure the accuracy of measurement and control, a large number of sensors are usually required to work at the same time, and the accuracy of the data is verified by mutual comparison to ensure the normal operation of the equipment. However, this method not only increases the complexity of the system, but also increases the cost and difficulty of maintenance.

[0004] Therefore, the market urgently needs a pressure sensor that can overcome the limitations of single-point measurement and has low cost and maintenance difficulty. Utility Model Content

[0005] The purpose of the utility model is to provide an integrated multi-probe pressure sensor and pressure detection device to address the problems existing in the prior art, which can effectively eliminate the errors that may be caused by single-point measurement, have strong flexibility and scalability, compact structure and high integration, and reduce leakage points and maintenance difficulties.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An integrated multi-probe pressure sensor comprises: a base plate, provided with an air inlet and a plurality of mounting slots, wherein the air inlet is connected to the mounting slots through an internal air cavity; a detection component, comprising a plurality of pressure probes, each of which is correspondingly arranged in one of the mounting slots and sealed to the mounting slots, and the detection end of the pressure probe is connected to the air cavity; a circuit board, fixedly arranged on one side of the base plate and connected to the lead of the pressure probe.

[0008] The mounting groove is arranged on the upper end surface of the base plate, and the air inlet is an air pipe joint seat arranged on the lower end surface of the base plate.

[0009] The mounting groove is provided with an internal thread, the pressure probe is fixed in the mounting groove through a gland, the gland is connected to the mounting groove through threads, and the lead of the pressure probe extends from the inner hole of the gland and is connected to the circuit board.

[0010] The circuit board is detachably connected with a plurality of operation and communication modules, which are used for performing comparative operations on the measurement values ​​of the plurality of pressure probes, communicating between the modules and communicating with the outside.

[0011] The circuit board is provided with a plurality of slots, and each of the computing and communication modules is correspondingly plugged into one of the slots.

[0012] The circuit board is provided with three cable interfaces, which are respectively used to connect the lead wires of the pressure probe, an external power supply and an external communication device.

[0013] The circuit board is provided with a relay module, which outputs corresponding switch quantity signals to control external devices.

[0014] A pressure detection device includes the above-mentioned pressure sensor; and also includes: a shell, installed on the outside of the pressure sensor and fixed to the base plate by screws; the air inlet extends out of the shell and is used to connect to the detection air source; a touch screen is fixed on one side of the shell and is electrically connected to the circuit board, and is used to display the operating status and measurement data of the pressure probe, and send control instructions to the circuit board.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By integrating multiple pressure probes, multi-point simultaneous measurement is achieved. Multi-point measurements can be compared with each other to eliminate errors caused by environmental factors, effectively overcoming the limitation of traditional single-point measurement methods that are easily affected by the environment, and significantly improving measurement accuracy and system stability.

[0017] Multiple pressure probes work independently. Even if one of the probes fails, the other probes can continue to provide measurement data, reducing the impact of single-point failures on the entire system and improving system stability and safety.

[0018] The slot design on the circuit board allows the computing and communication modules to be easily inserted or removed, and modules can be added or reduced as needed without making complex changes to the circuit board, allowing the sensor to adapt to different application scenarios and achieve functional expansion and upgrades;

[0019] By integrating multiple pressure probes on a base plate, the structure is compact and highly integrated, which reduces leakage points and maintenance difficulties. In addition, the modular design makes maintenance and replacement of parts easier and faster, further reducing maintenance costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of a pressure sensor in one embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the split structure of the pressure sensor in one embodiment of the present application;

[0023] In the figure: 1. Base plate; 2. Air inlet; 3. Mounting slot; 4. Pressure probe; 5. Circuit board; 6. Pressure cover; 7. Operation and communication module. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the first aspect of this application, Figure 1 and Figure 2 As shown, an integrated multi-probe pressure sensor is provided, including: a base plate 1, provided with an air inlet 2 and a plurality of mounting grooves 3, the air inlet 2 and the mounting grooves 3 are connected through an internal air cavity; a detection component, including a plurality of pressure probes 4, each pressure probe 4 is correspondingly arranged in a mounting groove 3 and is sealed and connected to the mounting groove 3, and the detection end of the pressure probe 4 is connected to the air cavity; a circuit board 5, fixedly arranged on one side of the base plate 1, and connected to the lead of the pressure probe 4.

[0029] Specifically, this sensor is mainly based on the sensitive response of the pressure probe to the gas pressure. When the gas enters the air cavity inside the base plate 1 through the air inlet 2, the pressure in the air cavity will be evenly distributed to each mounting groove 3. A pressure probe 4 is installed in each mounting groove 3. The detection ends of these pressure probes 4 are connected to the air cavity, so the pressure changes in the air cavity can be sensed in real time.

[0030] When the pressure in the air cavity changes, the pressure probe will convert it into an electrical signal and transmit it to the circuit board 5 through the lead wire. The circuit on the circuit board 5 will process these electrical signals to obtain accurate pressure measurement values.

[0031] Among them, the pressure probe 4 can adopt the isolation diaphragm electrical measurement principle. When pressure acts on the isolation diaphragm, the deformation of the diaphragm may be transmitted to the strain gauge through the guide rod, causing the strain gauge to deform, and then change its resistance value. The change in resistance value is converted into a voltage or current signal through a Wheatstone bridge, and then amplified and filtered, and finally output as a standard digital signal. This is the existing technology.

[0032] In this embodiment, by having multiple pressure probes 4 working simultaneously and comparing with each other, the sensor can effectively eliminate the error that may be caused by single-point measurement, thereby improving the accuracy of measurement.

[0033] The multiple pressure probes of this sensor work independently. Even if one of the probes fails, the other probes can continue to provide measurement data, reducing the impact of single-point failures on the entire system and improving the stability and safety of the system.

[0034] The sensor integrates multiple pressure probes 4 on a base plate 1 and realizes uniform pressure distribution through an internal air cavity. It has a compact structure and a high degree of integration, and reduces leakage points and maintenance difficulties.

[0035] Preferably, the number of mounting slots 3 and pressure probes 4 is set to three, as a balanced choice, neither too many, resulting in increased system complexity and cost, nor too few, so as to fail to provide sufficient redundancy and comparison information.

[0036] In some embodiments, the mounting groove 3 is provided on the upper end surface of the base plate 1, and the air inlet 2 is a trachea joint seat provided on the lower end surface of the base plate 1. Through the above design, the gas to be measured can be evenly distributed in the air cavity, thereby ensuring that each pressure probe 4 can receive a consistent pressure signal, thereby improving the accuracy of the measurement.

[0037] In some embodiments, the mounting groove 3 is provided with an internal thread, the pressure probe 4 is fixed in the mounting groove 3 through a gland 6, the gland 6 is connected to the mounting groove 3 through a thread, and the lead of the pressure probe 4 extends from the inner hole of the gland 6 and is connected to the circuit board 5. This connection method provides sufficient fastening force to ensure that the pressure probe 4 will not be displaced or loosened during the measurement process. The lead of the pressure probe 4 extends from the inner hole of the gland 6, ensuring that the connection between the lead and the circuit board 5 is stable and reliable.

[0038] In some embodiments, the circuit board 5 is detachably connected with several operation and communication modules 7, which are used to perform comparative operations on the measurement values ​​of several pressure probes 4, communicate between modules, and communicate with the outside. The operation and communication module 7 has the following functions: used to process the original measurement data; convert the generated analog signal into a digital signal; exchange data and information, multi-point measurement and data comparison to detect and correct deviations or errors; correct the measurement data to improve the overall measurement accuracy; if a fault is detected in the pressure probe 4, generate an alarm signal; drive the digital display screen to intuitively display the measurement data and system status information.

[0039] Preferably, the number of operation and communication modules 7 is set to three. After power-on, the three operation and communication modules will communicate with each other, randomly generate a master operation module, and the other two will serve as slave operation modules; when any of the operation modules fails, it will automatically exit operation, and at the same time, it will issue an alarm message to prompt the user that a module has failed; the three operation modules will measure and calculate the pressure values ​​of the three pressure probes at the same time, and the master operation module is responsible for comparing the three measurement data to verify the correctness of the data and finally output the correct digital quantity data. The three operation modules provide redundancy, and even if one of the modules fails, the other two modules can still continue to work to ensure the continuity of the measurement.

[0040] In some embodiments, the circuit board 5 is provided with a plurality of slots, and each computing and communication module 7 is correspondingly plugged into a slot. The slot design improves the scalability and flexibility, and when it is necessary to increase or decrease the computing and communication module 7, it is only necessary to simply insert or remove the module without making complicated changes to the circuit board 5.

[0041] In some embodiments, the circuit board 5 is provided with three cable interfaces, which are respectively used to connect the leads of the pressure probe 4, the external power supply, and the external communication device. The three cable interface designs provide a convenient and orderly connection method to ensure effective communication and power supply between the pressure probe 4, the external power supply, and the external communication device.

[0042] In some embodiments, the circuit board 5 is provided with a relay module for outputting corresponding switch signals to control external devices. The relay module is used to receive signal instructions from the circuit board 5. When the measured pressure data exceeds the set range, the relay module sends a warning signal to control the action of the external device.

[0043] In a second aspect of the present application, a pressure detection device is provided, comprising the above-mentioned pressure sensor; and further comprising:

[0044] The housing is installed on the outside of the pressure sensor and fixed to the base plate 1 by screws; the air inlet 2 extends out of the housing and is used to connect to the detection air source;

[0045] The touch screen is fixedly arranged on one side of the housing and is electrically connected to the circuit board 5 , and is used to display the operating status and measurement data of the pressure probe 4 , providing intuitive and immediate feedback.

[0046] In addition, the touch screen, as a human-computer interaction tool, allows the operator to send control instructions and flexibly operate and manage the pressure detection device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated multi-probe pressure sensor, characterized in that: include: A base plate (1) is provided with an air inlet (2) and a plurality of mounting grooves (3), wherein the air inlet (2) is connected to the mounting grooves (3) via an internal air cavity; A detection component, comprising a plurality of pressure probes (4), each of the pressure probes (4) being arranged in a corresponding installation groove (3) and being sealedly connected to the installation groove (3), and a detection end of the pressure probe (4) being in communication with the air cavity; A circuit board (5) is fixedly arranged on one side of the base plate (1) and is connected to the lead wire of the pressure probe (4).

2. The integrated multi-probe pressure sensor according to claim 1, characterized in that: The mounting groove (3) is arranged on the upper end surface of the base plate (1), and the air inlet (2) is an air pipe joint seat arranged on the lower end surface of the base plate (1).

3. The integrated multi-probe pressure sensor according to claim 1, characterized in that: The mounting groove (3) is provided with an internal thread, the pressure probe (4) is fixed in the mounting groove (3) via a pressure cover (6), the pressure cover (6) and the mounting groove (3) are connected via threads, and the lead of the pressure probe (4) extends from the inner hole of the pressure cover (6) and is connected to the circuit board (5).

4. The integrated multi-probe pressure sensor according to claim 1, characterized in that: The circuit board (5) is detachably connected to a plurality of operation and communication modules (7) for performing comparative operations on the measurement values ​​of the plurality of pressure probes (4), communicating between the modules and communicating with the outside.

5. The integrated multi-probe pressure sensor according to claim 4, characterized in that: The circuit board (5) is provided with a plurality of slots, and each of the operation and communication modules (7) is correspondingly plugged into one of the slots.

6. The integrated multi-probe pressure sensor according to claim 1, characterized in that: The circuit board (5) is provided with three wiring interfaces, which are respectively used to connect the lead wires of the pressure probe (4), an external power supply and an external communication device.

7. The integrated multi-probe pressure sensor according to claim 1, characterized in that: The circuit board (5) is provided with a relay module for outputting corresponding switch quantity signals to control external equipment.

8. A pressure detection device, characterized in that: A pressure sensor comprising any one of claims 1 to 7; and further comprising: A shell is installed on the outside of the pressure sensor and fixed to the base plate (1) by screws; the air inlet (2) extends out of the shell and is used to connect to a detection air source; A touch screen is fixedly arranged on one side of the housing and is electrically connected to the circuit board (5), and is used to display the operating status and measurement data of the pressure probe (4), and to send control instructions to the circuit board (5).

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