Sensor layout structure and sensor

Abstract

The utility model belongs to the technical field of pressure sensors, and particularly relates to a sensor layout structure and a sensor, the sensor layout structure comprises a sensor internal layout assembly, the sensor internal layout assembly comprises a piezoelectric sensing probe, the bottom of the piezoelectric sensing probe is fixedly connected with a pressure transmission rod, and the pressure transmission rod is fixedly connected with the pressure transmission rod. The bottom of the pressure transmission rod is fixedly connected with a lower pressing plate, a piezoelectric element is tightly attached to the bottom of the lower pressing plate, the bottom of the piezoelectric element is fixedly connected with a bottom fixing plate, the side of the lower pressing plate is integrally connected with a limiting sliding block, and the outer portion of the limiting sliding block is slidably connected with a limiting supporting block. According to the utility model, through the reasonable layout structure in the sensor and the arrangement of the limiting block, the internal stability of the sensor is enhanced, the influence of the inclination of the lower pressing plate on pressure transmission is prevented, and the heat-dissipating shell is arranged, so that the damage of internal elements caused by excessive temperature due to internal heat accumulation is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a sensor layout structure and a sensor. Background Art

[0002] Piezoelectric sensor is a sensor based on the piezoelectric effect, which can convert mechanical strain or force into electrical signal output. The piezoelectric effect is a physical phenomenon that generates electric charge inside certain materials when they are subjected to mechanical force or pressure. This phenomenon makes piezoelectric sensors widely used in many fields.

[0003] In Chinese Patent No. 201820595598.7, the utility model discloses a pressure sensor with a heat dissipation device, including a pressure sensor body, the pressure sensor body including a pressure joint and a shell, the pressure joint is arranged below the shell, and also includes a heat dissipation device, the heat dissipation device includes a heat dissipation pipe and a water pump, the heat dissipation pipe includes a heat dissipation zone and a cooling zone, the cooling zone is located at both ends of the heat dissipation zone, the heat dissipation zone is wound around the outside of the shell, the cooling zone is respectively connected to the water inlet and the water outlet of the water pump, and a flowing medium is arranged in the heat dissipation pipe. The pressure sensor with a heat dissipation device provided by the utility model, the heat on the pressure sensor is transferred to the heat dissipation zone, the temperature of the pressure sensor is reduced, the water pump drives the medium to flow, the medium in the cooling zone and the heat dissipation zone flows alternately, the medium in the heat dissipation zone takes away the heat on the pressure sensor, the cooling zone naturally cools the medium with heat, and continuously cools the pressure sensor to prevent the pressure sensor from reducing the detection accuracy due to excessive temperature.

[0004] The existing sensor layout structure and sensor have the problem that the diaphragm or pressure plate inside the piezoelectric sensor used to transmit pressure to the piezoelectric element is directly attached to the top of the piezoelectric element, and lacks a limiting mechanism. During use, the diaphragm or pressure plate may be deflected, which may easily affect the transmission of pressure and thus affect the pressure detection result. The existing sensor uses an external heat dissipation pipe to dissipate the heat of the sensor. This method also requires the installation of a heat dissipation pipe and a water pump on the outside of the sensor, which will increase the overall volume of the sensor, may affect the installation and use of the sensor, and has a high manufacturing cost.

[0005] Therefore, in order to solve the above problems, a sensor layout structure and a sensor are proposed. Utility Model Content

[0006] In order to make up for the shortcomings of the existing technology, the problems of the existing sensor layout structure and the diaphragm or pressure plate inside the sensor used to transmit pressure to the piezoelectric element are solved. The diaphragm or pressure plate is directly attached to the top of the piezoelectric element and lacks a limiting mechanism. During use, the diaphragm or pressure plate may be deflected, which may easily affect the transmission of pressure and further affect the pressure detection result. The existing sensor uses an external heat dissipation pipe to dissipate the sensor. This method also requires a heat dissipation pipe and a water pump to be installed on the outside of the sensor, which will increase the overall volume of the sensor, may affect the installation and use of the sensor, and has a high manufacturing cost.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a sensor layout structure and a sensor described in the utility model include a sensor internal layout component, the sensor internal layout component includes a piezoelectric sensor probe, the bottom of the piezoelectric sensor probe is fixedly connected to a pressure transmission rod, and the bottom of the pressure transmission rod is fixedly connected to a lower pressure plate, the bottom of the lower pressure plate is tightly fitted with a piezoelectric element, and the bottom of the piezoelectric element is fixedly connected to a bottom fixing plate, the side of the lower pressure plate is integrally connected to a limiting slider, and the outer sliding connection of the limiting slider is a limiting support block.

[0008] Preferably, the lower pressure plate forms a sliding structure through a limiting sliding block and a limiting support block, and the limiting support block is fixedly connected to the bottom fixed plate. Two limiting support blocks are symmetrically arranged about the vertical center axis of the lower pressure plate, and the material of the limiting support blocks is plastic material.

[0009] Preferably, the material of the piezoelectric element is set to be a piezoelectric ceramic material, and the materials of the lower pressing plate and the bottom fixing plate are both set to be a PE plastic material.

[0010] Preferably, a sensor heat dissipation housing assembly is installed outside the sensor internal layout assembly, a sensor wiring port assembly is arranged on the side of the sensor heat dissipation housing assembly, a sensor mounting plate is fixedly connected to the bottom end of the sensor heat dissipation housing assembly, and a sensor fixing screw penetrates the inside of the sensor mounting plate, the sensor heat dissipation housing assembly includes a piezoelectric sensor housing, a first side air inlet is installed on one side of the outer wall of the piezoelectric sensor housing, and a first side air outlet is arranged on the side of the first side air inlet, a second side air inlet is installed on the other side of the outer wall of the piezoelectric sensor housing, and a second side air outlet is arranged on the side of the second side air inlet.

[0011] Preferably, the first side air inlet hole is shaped like a trumpet with an outer opening larger than an inner opening, and the horizontal center axis of the first side air inlet hole coincides with the horizontal center axis of the second side air outlet hole; the second side air inlet hole is shaped like a trumpet with an outer opening larger than an inner opening, and the horizontal center axis of the second side air inlet hole coincides with the horizontal center axis of the first side air outlet hole.

[0012] Preferably, the sensor wiring port assembly includes an inserted electrode, the end of the inserted electrode is welded to a conductive connecting plate, and the inside of the conductive connecting plate is electrically connected to a metal conductive wire, the end of the metal conductive wire is integrally connected to a connecting wire, and the outside of the connecting wire is fixedly connected to a protective ring, and a wire through hole is provided on the side of the protective ring.

[0013] Preferably, the outer diameter of the protective ring is larger than the inner diameter of the wire through hole, and the wire through hole and the piezoelectric sensor housing are integrated, the materials of the inserted electrode and the conductive connecting plate are both made of aluminum-copper alloy, and the end of the inserted electrode away from the conductive connecting plate is fixedly connected to the interior of the piezoelectric element.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model is provided with a sensor internal layout component, and the piezoelectric sensor probe is located outside the sensor. After being subjected to pressure, the pressure can be transmitted to the piezoelectric element through the pressure transmission rod and the lower pressure plate, and then the pressure signal is converted into a charge signal by the piezoelectric element, so as to facilitate the measurement of the pressure value, and the lower pressure plate can be limited by the limit slider and the limit support block, so that it can only move up and down on the top of the piezoelectric element without tilting or falling off, so as to facilitate preventing it from affecting the pressure detection;

[0016] 2. The utility model is provided with a sensor heat dissipation housing component, and air inlet holes and air outlet holes are correspondingly provided on both sides of the piezoelectric sensor housing, so as to form a circulation environment inside the piezoelectric sensor housing, so that the air inside the housing can be exchanged with the outside air, so as to facilitate the discharge of the internal heat, and to prevent the temperature from gradually increasing and affecting the piezoelectric material inside the housing, and the shape of the air inlet hole is set in a trumpet shape, so as to facilitate the entry of air, and in the process of entering, the circulation of air can be accelerated;

[0017] 3. The utility model is provided with a sensor wiring port assembly, and a protective ring is provided on the connecting wire located at the inner end of the piezoelectric sensor housing. When the outer end of the connecting wire is pulled by external force, the protective ring cannot pass through the wire through hole, so that the part of the connecting wire located inside the piezoelectric sensor housing will not be displaced, thereby facilitating the prevention of the metal conductive wire from falling off between the conductive connecting piece or from falling off between the inserted electrode and the piezoelectric element, thereby facilitating the protection of the components inside the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 labor.

[0019] Figure 1 It is a schematic diagram of the internal structure of the utility model as a whole;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model as a whole from the side;

[0021] Figure 3 It is a three-dimensional structural diagram of one side of the internal layout component part of the sensor of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the other side of the heat dissipation housing component of the sensor of the utility model;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the heat dissipation housing component of the sensor of the utility model;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the sensor wiring port component part of the utility model.

[0025] In the figure: 1. sensor internal layout assembly; 2. sensor heat dissipation housing assembly; 3. sensor wiring port assembly; 4. sensor mounting plate; 5. sensor fixing screw; 101. piezoelectric sensor probe; 102. pressure transmission rod; 103. lower pressure plate; 104. piezoelectric element; 105. bottom fixing plate; 106. limit slider; 107. limit support block; 201. piezoelectric sensor housing; 202. first side air inlet; 203. first side air outlet; 204. second side air inlet; 205. second side air outlet; 301. inserted electrode; 302. conductive connecting piece; 303. metal conductive wire; 304. connecting wire; 305. protective ring; 306. wire through hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments 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.

[0027] Embodiment 1

[0028] See also Figure 1 and Figure 3 As shown, a sensor layout structure includes a sensor internal layout component 1, and the sensor internal layout component 1 includes a piezoelectric sensor probe 101, the bottom of the piezoelectric sensor probe 101 is fixedly connected to a pressure transmission rod 102, and the bottom of the pressure transmission rod 102 is fixedly connected to a lower pressure plate 103, the bottom of the lower pressure plate 103 is tightly fitted with a piezoelectric element 104, and the bottom of the piezoelectric element 104 is fixedly connected to a bottom fixing plate 105, the side of the lower pressure plate 103 is integrally connected to a limiting slider 106, and the outer sliding connection of the limiting slider 106 is limited to a support block 107.

[0029] See also Figure 1 and Figure 3 As shown, a sensor layout structure is shown, the lower pressure plate 103 forms a sliding structure with a limit support block 107 through a limit slider 106, and the limit support block 107 is fixedly connected to the bottom fixed plate 105, two limit support blocks 107 are symmetrically arranged about the vertical center axis of the lower pressure plate 103, and the material of the limit support block 107 is set to plastic material, the material of the piezoelectric element 104 is set to piezoelectric ceramic material, the material of the lower pressure plate 103 and the bottom fixed plate 105 are both set to PE plastic material, the piezoelectric sensor probe 101 is located outside the sensor, and after being subjected to pressure, the pressure can be transmitted to the piezoelectric element 104 through the pressure transmission rod 102 and the lower pressure plate 103, and then the piezoelectric element 104 is used to convert the pressure signal into a charge signal, so as to facilitate the measurement of the pressure value, and the lower pressure plate 103 can be limited by the limit slider 106 and the limit support block 107, so that it can only move up and down on the top of the piezoelectric element 104 without tilting or falling off, so as to prevent it from affecting the detection of pressure.

[0030] Embodiment 2

[0031] See also Figure 1As shown, a sensor is provided with a sensor heat dissipation housing assembly outside the sensor internal layout assembly, a sensor wiring port assembly 3 is arranged on the side of the sensor heat dissipation housing assembly 2, and a sensor mounting plate 4 is fixedly connected to the bottom end of the sensor heat dissipation housing assembly 2, and a sensor fixing screw 5 passes through the interior of the sensor mounting plate 4.

[0032] See also Figure 4 and Figure 5 As shown, a sensor, a sensor heat dissipation housing assembly 2 includes a piezoelectric sensor housing 201, a first side air inlet 202 is installed on one side of the outer wall of the piezoelectric sensor housing 201, and a first side air outlet 203 is arranged on the side of the first side air inlet 202, a second side air inlet 204 is installed on the other side of the outer wall of the piezoelectric sensor housing 201, and a second side air outlet 205 is arranged on the side of the second side air inlet 204, the first side air inlet 202 is shaped like a trumpet with an outer end opening larger than an inner end opening, and the horizontal center axis of the first side air inlet 202 is coincident with the horizontal center axis of the second side air outlet 205, and the second side air inlet 204 is arranged on the side of the second side air inlet 204. The shape of the hole 204 is a trumpet-shaped setting with an outer opening larger than an inner opening, and the horizontal center axis of the second side air inlet 204 coincides with the horizontal center axis of the first side air outlet 203. Air inlet holes and air outlet holes are correspondingly provided on both sides of the piezoelectric sensor housing 201, so that a circulation environment can be formed inside the piezoelectric sensor housing 201, so that the air inside can be exchanged with the outside air, and then the heat inside can be discharged, so as to prevent the temperature from accumulating and gradually becoming too high, which will affect the piezoelectric material inside. The shape of the air inlet hole is a trumpet-shaped setting, so that air can enter easily and accelerate the circulation of air during the entry process.

[0033] See also Figure 6As shown, a sensor, the sensor wiring port assembly 3 includes an insertion electrode 301, the end of the insertion electrode 301 is welded with a conductive connecting piece 302, and the inside of the conductive connecting piece 302 is electrically connected to a metal conductive wire 303, the end of the metal conductive wire 303 is integrally connected to a connecting wire 304, and the outside of the connecting wire 304 is fixedly connected to a protective ring 305, and a wire through hole 306 is provided on the side of the protective ring 305, the outer diameter of the protective ring 305 is larger than the inner diameter of the wire through hole 306, and the wire through hole 306 is integrated with the piezoelectric sensor housing 201, and the materials of the insertion electrode 301 and the conductive connecting piece 302 are The material is an aluminum-copper alloy, and one end of the inserted electrode 301 away from the conductive connecting piece 302 is fixedly connected to the inside of the piezoelectric element 104. A protective ring 305 is provided on the connecting wire 304 located at the inner end of the piezoelectric sensor housing 201. When the outer end of the connecting wire 304 is pulled by an external force, the protective ring 305 cannot pass through the wire through hole 306, so that the part of the connecting wire 304 located inside the piezoelectric sensor housing 201 will not be displaced, thereby preventing the metal conductive wire 303 from falling off from the conductive connecting piece 302 or the inserted electrode 301 from falling off from the piezoelectric element 104, thereby facilitating protection of the components inside the sensor.

[0034] Working principle: First, use the sensor fixing screw 5 to penetrate the hole inside the sensor mounting plate 4 and screw it into the position where it needs to be installed, so that the sensor can be installed and fixed. After the installation is completed, if the outside world generates pressure on the piezoelectric sensor probe 101, the piezoelectric sensor probe 101 will press the pressure transmission rod 102 to move downward, and at the same time, the bottom end of the pressure transmission rod 102 will push the lower pressure plate 103 to move downward, and the lower pressure plate 103 will generate a pressure on the piezoelectric element 104 below it. The piezoelectric element 104 is made of piezoelectric ceramic material. After being compressed, it will deform, and the inside of the piezoelectric element 104 will generate charge polarization. The insertion electrode 301 inserted into the end of the piezoelectric element 104 will capture these charges and convert them into electrical signals, which are transmitted to the connecting wire 304 through the conductive connecting piece 302 and the metal conductive wire 303. The pressure on the pressure sensor is proportional to the generated electrical signal, and then the size of the pressure value can be obtained based on the analysis of the electrical signal;

[0035] The sensor will generate a certain amount of heat inside during operation, and the outside air can enter the interior of the piezoelectric sensor housing 201 from the first side air inlet 202 and the second side air inlet 204, and the first side air inlet 202 and the second side air inlet 204 are both horn-shaped with the outer opening larger than the inner opening. When the air enters, it will gradually shrink, which will increase the flow rate of the air inside the piezoelectric sensor housing 201. The flowing air passes through the inside of the piezoelectric sensor housing 201 and is discharged from the first side air outlet 203 and the second side air outlet 205, circulates inside the piezoelectric sensor housing 201, and brings out the heat inside it.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A sensor layout structure, characterized in that: The invention comprises a sensor internal layout component (1), wherein the sensor internal layout component (1) comprises a piezoelectric sensor probe (101), the bottom of the piezoelectric sensor probe (101) is fixedly connected to a pressure transmission rod (102), and the bottom of the pressure transmission rod (102) is fixedly connected to a lower pressure plate (103), the bottom of the lower pressure plate (103) is tightly fitted with a piezoelectric element (104), and the bottom of the piezoelectric element (104) is fixedly connected to a bottom fixing plate (105), the side of the lower pressure plate (103) is integrally connected to a limit slider (106), and the outside of the limit slider (106) is slidably connected to a limit support block (107).

2. A sensor layout structure according to claim 1, characterized in that: The lower pressure plate (103) forms a sliding structure through a limiting slider (106) and a limiting support block (107), and the limiting support block (107) is fixedly connected to the bottom fixed plate (105). Two limiting support blocks (107) are symmetrically arranged about the vertical center axis of the lower pressure plate (103), and the material of the limiting support blocks (107) is plastic material.

3. A sensor layout structure according to claim 1, characterized in that: The material of the piezoelectric element (104) is set to be a piezoelectric ceramic material, and the materials of the lower pressing plate (103) and the bottom fixing plate (105) are both set to be a PE plastic material.

4. A sensor, comprising a sensor arrangement structure according to any one of claims 1 to 3, characterized in that: A sensor heat dissipation housing component (2) is installed outside the sensor internal layout component (1), a sensor wiring port component (3) is arranged on the side of the sensor heat dissipation housing component (2), a sensor mounting plate (4) is fixedly connected to the bottom end of the sensor heat dissipation housing component (2), and a sensor fixing screw (5) is passed through the interior of the sensor mounting plate (4); The sensor heat dissipation housing assembly (2) comprises a piezoelectric sensor housing (201), wherein a first side air inlet (202) is installed on one side of an outer wall of the piezoelectric sensor housing (201), and a first side air outlet (203) is arranged on the side of the first side air inlet (202), and a second side air inlet (204) is installed on the other side of the outer wall of the piezoelectric sensor housing (201), and a second side air outlet (205) is arranged on the side of the second side air inlet (204).

5. A sensor according to claim 4, characterized in that: The first side air inlet (202) is shaped like a trumpet with an outer opening larger than an inner opening, and the horizontal center axis of the first side air inlet (202) is arranged to coincide with the horizontal center axis of the second side air outlet (205); the second side air inlet (204) is shaped like a trumpet with an outer opening larger than an inner opening, and the horizontal center axis of the second side air inlet (204) is arranged to coincide with the horizontal center axis of the first side air outlet (203).

6. A sensor according to claim 4, characterized in that: The sensor wiring port assembly (3) comprises an insertion electrode (301), the end of the insertion electrode (301) is welded to a conductive connecting piece (302), the inside of the conductive connecting piece (302) is electrically connected to a metal conductive wire (303), the end of the metal conductive wire (303) is integrally connected to a connecting wire (304), the outside of the connecting wire (304) is fixedly connected to a protective ring (305), and the side of the protective ring (305) is provided with a wire through hole (306).

7. A sensor according to claim 6, characterized in that: The outer diameter of the protective ring (305) is greater than the inner diameter of the wire through hole (306), and the wire through hole (306) and the piezoelectric sensor housing (201) are integrated. The materials of the insertion electrode (301) and the conductive connecting piece (302) are both made of aluminum-copper alloy material, and one end of the insertion electrode (301) away from the conductive connecting piece (302) is fixedly connected to the inside of the piezoelectric element (104).

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