CN108955762B - Composite sensor - Google Patents
Composite sensor Download PDFInfo
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- CN108955762B CN108955762B CN201810565541.7A CN201810565541A CN108955762B CN 108955762 B CN108955762 B CN 108955762B CN 201810565541 A CN201810565541 A CN 201810565541A CN 108955762 B CN108955762 B CN 108955762B
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- 239000000523 sample Substances 0.000 claims abstract description 39
- 230000008054 signal transmission Effects 0.000 claims abstract description 37
- 238000009434 installation Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 18
- 229920001971 elastomer Polymers 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 230000035939 shock Effects 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 5
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- 238000013461 design Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 5
- 206010012411 Derailment Diseases 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a composite sensor, which comprises a base, wherein a first circuit board is arranged in an inner cavity of the base and is used for receiving and transmitting vibration and impact signals, a vibration impact sensitive device is arranged on the first circuit board, a temperature probe is arranged on the side part of the base, a temperature sensitive device is arranged in the temperature probe, and a signal transmission line is connected with the first circuit board and the temperature sensitive device. Through the structural design of the composite sensor, the monitoring of the temperature and vibration impact parameters of the running rotating part of the motor train unit can be effectively realized, and the running safety of the motor train unit is greatly improved.
Description
Technical Field
The invention relates to the field of monitoring equipment, in particular to a composite sensor.
Background
The motor train unit is also called as Multiple Units (MU electric motor train unit is called as EMU internal combustion motor train unit, for example, KIHA series of Japan is called as DMU) and is one type of railway train. At present, a motor train unit mainly has two traction power distribution modes, namely power dispersion and power concentration, wherein the power dispersion type motor train unit is truly modern. The power efficiency of the motor train unit is higher, particularly on a slope, and the weight of the motor train unit truck is placed on each wheel with power, so that the motor train unit truck cannot become unnecessary load dragged behind a locomotive; meanwhile, the requirement of a power shaft on the motor train unit on the rail adhesion force is low, and the load of each shaft is also low, so that the high-speed railway route of the motor train unit is selected, and the requirements on the civil engineering of the route and the rail are low; in addition, the motor train unit has high regenerative braking efficiency, good speed regulation performance and large braking deceleration because of more motors, and is particularly suitable for a line with more speed limiting sections, so the motor train unit is gradually one of the modern popular rapid transportation means.
In actual operation, as the running speed of the motor train unit is extremely high, the fault of the running rotating component of the motor train unit moving at high speed easily causes overhigh temperature and overlarge vibration impact; the wheel rail is worn, out of round, derailed and the like to cause vibration and impact changes, and the driving safety of the motor train unit is affected by the vibration and impact changes. In order to realize the diagnosis of the fault of the running rotating component, the wheel rail fault, the derailment and the like of the high-speed motor train unit and prevent the running component of the motor train unit from being faulty so as to influence the running safety, in the prior art, special sensors are often arranged at the running component of the motor train unit so as to monitor the working state of the special sensors in real time.
Fig. 1 provides a high-sealing platinum resistance temperature sensor with the bulletin number of CN202974488U, a signal transmission cable 08 of the sensor passes through a fixed seat and is electrically connected with a platinum resistance sensing core arranged at the inner end of a metal protection tube 02, a heat-conducting insulating resin adhesive 03 is encapsulated in the metal protection tube, and the sensor is fixedly connected on the fixed seat in a sealing way; the fixing seat penetrating section of the signal transmission cable is sealed, the process installation hole of the fixing seat is a screw hole, a plug 05 made of the same material as the fixing seat is screwed into the process installation hole, and the inner cavity of the fixing seat in the plug is filled with flexible insulating temperature-resistant silicon rubber. The high-sealing platinum resistance temperature sensor can realize temperature monitoring, but cannot monitor vibration impact causing faults at all.
Disclosure of Invention
The invention aims to provide a composite sensor, which can effectively monitor the temperature and vibration impact parameters of a running rotating part of a motor train unit through the structural design of the composite sensor, and greatly improve the running safety of the motor train unit.
The utility model provides a compound sensor, includes the base, the base inner chamber is provided with first circuit board, first circuit board is used for vibration and shock signal's receipt transmission, install vibration shock sensitive device on the first circuit board, the base lateral part is provided with temperature probe, be provided with temperature sensitive device in the temperature probe, first circuit board with be connected with the signal transmission line on the temperature sensitive device.
Preferably, the other end of the signal transmission line is connected with a second circuit board, the second circuit board is used for receiving, transmitting and normalizing vibration, impact and temperature signals, and an electric connector is sleeved outside the second circuit board.
Preferably, an installation cavity for installing the first circuit board and the vibration impact sensitive device is formed in the base, a first installation hole for penetrating the signal transmission line and a second installation hole for penetrating the temperature probe are formed in the side wall of the base, and the first installation hole and the second installation hole are communicated with the installation cavity.
Preferably, the first circuit board is connected with the base through screws, wherein a process hole is formed in the side wall of the base, screws used for fixing and limiting the first circuit board are arranged in the process hole, a round cover plate is arranged outside the screws, an opening is formed in the side wall of the other position of the base, and a square cover plate is arranged on the opening.
Preferably, the first circuit board is welded with the base, wherein clamping grooves are formed in two sides and the front end of the installation cavity, the first circuit board comprises a sensitive device part and a conditioning plate part, the sensitive device part is matched with the clamping grooves in two sides of the installation cavity, and the conditioning plate part is matched with the clamping grooves in the front end of the installation cavity.
Preferably, the first circuit board comprises a substrate, a circuit block is arranged on the substrate, and a shielding cover is arranged on the outer part of the circuit block in a surrounding mode.
Preferably, the vibration impact sensing device is a triaxial vibration impact sensing device, and the triaxial vibration impact sensing device can detect vibration impact of X, Y, Z three dimensions in a three-dimensional space.
Preferably, the signal transmission line is externally sleeved with a sheath, the sheath is an armored metal hose sheath or a rubber hose sheath, a threaded plug or a locking cap is arranged between the sheath and the base, and an adapter seat or an embedding tube is arranged outside the threaded plug or the locking cap.
Preferably, the signal transmission line comprises a first cable and a second cable, the first cable and the second cable are mutually shielded and insulated, the first cable is a silver-plated copper wire cable and is connected with a temperature sensitive device in the temperature probe, and the second cable is a tin-plated copper wire cable and is connected with the first circuit board.
Preferably, the temperature probe is in a rod-shaped structure, at least two temperature sensitive devices are arranged at the top end of the inner cavity of the temperature probe, and pressure-resistant insulating films are arranged between the temperature sensitive devices and the inner wall of the temperature probe and between different temperature sensitive devices.
Preferably, the temperature sensitive device is provided with a thermal resistor or a thermocouple with remote temperature measurement capability.
Preferably, a fixing seat is arranged between the second circuit board and the electric connector, and a double-hole rubber plug used for sealing and isolating the inside and the outside of the electric connector is arranged outside the electric connector.
Preferably, the electrical connector is a circular electrical connector or a rectangular connector.
The beneficial effects of the invention are as follows: when the composite sensor is specifically implemented, the equipment is arranged at the running rotating part of the motor train unit to be monitored, the vibration impact value is monitored through the vibration impact sensing device, then the relevant signals are transmitted to the first circuit board, the first circuit board further transmits the relevant information to the signal transmission line, meanwhile, the temperature sensing device synchronously monitors the external temperature value and transmits the relevant information to the signal transmission line, and finally, the signal transmission line transmits the relevant signals to the external controller to realize the output judgment of the signals, so that the temperature and vibration impact parameters of the running rotating part of the motor train unit can be effectively monitored, and the running safety of the motor train unit is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art high seal platinum resistance temperature sensor;
FIG. 2 is a schematic diagram of the overall structure of a composite sensor according to embodiment 1 of the present invention;
FIG. 3 is an axial cross-sectional view of a composite sensor as disclosed in example 1 of the present invention;
FIG. 4 is a sectional view showing the inside of the base when the screw of embodiment 2 of the present invention is attached;
FIG. 5 is an exploded view of the composite sensor of example 2 of the present invention when the screws are connected;
fig. 6 is a schematic structural diagram of a first circuit board in the case of soldering connection according to embodiment 3 of the present invention;
FIG. 7 is a sectional view showing the inside of the base when the welding is performed in accordance with embodiment 3 of the present invention;
FIG. 8 is an explosion diagram of the composite sensor in the case of welded connection according to embodiment 3 of the present invention;
fig. 9 is a top view of a first circuit board according to embodiment 4 of the present invention;
fig. 10 is a front view of a first circuit board according to embodiment 4 of the present invention;
fig. 11 is a schematic structural view of an armoured metal hose sheath according to embodiment 5 of the present invention;
FIG. 12 is a schematic view of a rubber hose jacket according to embodiment 5 of the present invention;
fig. 13 is a radial sectional view of a signal transmission line disclosed in embodiment 6 of the present invention;
FIG. 14 is a schematic view showing the structure of a temperature probe according to embodiment 7 of the present invention;
fig. 15 and 16 are schematic views showing connection between a second circuit board and an electrical connector according to embodiment 8 of the present invention.
Detailed Description
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
Example 1:
referring to fig. 2 to 3, fig. 2 to 3 provide a specific embodiment of the composite sensor according to the present invention, wherein fig. 2 is a schematic diagram of the overall structure of the composite sensor disclosed in embodiment 1 of the present invention; fig. 3 is an axial sectional view of a composite sensor disclosed in embodiment 1 of the present invention.
As shown in fig. 2 to 3, the composite sensor provided in this embodiment can realize monitoring of vibration impact and temperature at the same time. The composite sensor provided by the embodiment comprises a base 1, a first circuit board 2, a vibration impact sensing device 3, a temperature probe 4, a temperature sensing device 5 and a signal transmission line 6.
In this scheme, compound sensor includes base 1, and base 1 is used for providing the support space for the installation of first circuit board 2 and temperature probe 4 etc. and the specific structure of base 1 carries out the selection design as required, and the base 1 that this embodiment figure provided has selected the hexagonal base. In particular use, the base 1 is typically mounted at an external site to be monitored. For example, on the points to be monitored of the running rotary member of the motor train unit to be monitored.
The inner cavity of the base 1 is provided with a first circuit board 2, and the first circuit board 2 is used for receiving and transmitting vibration and impact signals.
The first circuit board 2 is mounted with a vibration shock sensor 3, and the vibration shock sensor 3 is used for sensing external vibration shock physical quantity and transmitting related signals to the first circuit board 2. Specifically, mechanical vibration generated by the fault of the running part of the motor train unit is transmitted to the mounting surface of the base 1 through the mounting interface and then transmitted to the first circuit board 2 and the vibration impact sensitive device 3 thereon, so that the vibration impact sensitive device 3 is excited to sense corresponding vibration and impact output caused by generalized resonance.
The vibration impact sensing device 3 can utilize the sensing principles of piezoelectricity, capacitance, piezoresistance and the like, the mounting mode of the vibration impact sensing device is welded on the first circuit board 2 by adopting a surface mounting process, the requirement of vibration impact detection in multiple mounting directions (such as a temperature probe 4 perpendicular to the sensing direction of an axle box end and a temperature probe 4 parallel to the sensing direction of a gear box and a motor end) can be realized by adjusting the bonding pad direction of the first circuit board 2, and the vibration impact sensing device 3 can adopt a multiaxial device to simultaneously perform multiaxial detection, so that the requirements of vibration and impact signal extraction such as running part fault monitoring diagnosis, derailment diagnosis, rail surface detection and the like are met. In this embodiment, the vibration impact sensor 3 is preferably a triaxial vibration impact sensor, and the triaxial vibration impact sensor can detect the vibration impact in three dimensions X, Y, Z in the three-dimensional space. Of course, it is also possible to selectively mount a single-axis vibration shock-sensitive device that can detect only one-direction vibration shock at each of the different axial detection positions.
The side of the base 1 is provided with a temperature probe 4, a temperature sensitive device 5 is arranged in the temperature probe 4, and the temperature sensitive device 5 is used for measuring external temperature.
The first circuit board 2 and the temperature sensitive device 5 are connected with a signal transmission line 6, and the signal transmission line 6 is used for transmitting signals.
Therefore, after the signal transmission line 6 receives the signals transmitted by the first circuit board 2 and the temperature sensing device 5, the signal transmission line 6 can transmit the related signals to an external controller to realize signal output judgment, so that monitoring of the temperature, vibration and impact parameters of the running rotating part of the motor train unit, and monitoring of the working condition of a wheel track, vibration and impact parameters required by derailment prevention can be effectively realized.
In this embodiment, the other end of the signal transmission line 6 is connected with a second circuit board 7, and the second circuit board 7 is used for receiving, transmitting and normalizing vibration, impact and temperature signals. Normalization is a way to simplify the computation, i.e., an expression with dimension is transformed into a non-dimensional expression, which becomes a scalar. Normalization is a dimensionless processing means, which changes the absolute value of the numerical value of a physical system into a certain relative value relation, thereby simplifying calculation and reducing the magnitude. After various operations of the external calculator are finished, all can be restored by real-time inverse normalization processing. Specifically, the second circuit board 7 can adjust the sensitivity of vibration, impact, etc. to the same range, that is, has the same output response to the same fault, and can effectively satisfy the interchange of the field installation of the composite sensor.
In this embodiment, in order to further facilitate connection and signal transmission of the device, the second circuit board 7 is externally sleeved with an electrical connector 8, and the electrical connector 8 is generally connected with an external controller or a calculator, so that the vibration impact signal and the temperature signal monitored by the composite sensor are transmitted outwards, and the external controller or the calculator judges the operation condition of the device to be monitored. Specifically, the temperature, vibration and impact signals may be directly output through the signal transmission line 6 (e.g., a cable), or may be output by a circular electrical connector or a rectangular electrical connector, or may be directly input into the external sampling system terminal row by a connection terminal.
When the scheme is specifically implemented, the composite sensor is arranged at a running rotating part of the motor train unit to be monitored or an axle box bearing large vibration, an external vibration impact value is monitored through the vibration impact sensing device 3, then related signals are transmitted to the first circuit board 2, the first circuit board 2 further transmits related information to the second circuit board 7, meanwhile, the temperature sensing device 5 synchronously monitors the external temperature value and transmits the related information to the second circuit board 7, the second circuit board 7 receives, transmits and normalizes the vibration, impact and temperature signals, and finally, the electric connector 8 is connected with an external controller to realize output judgment of the signals, so that the temperature of the running rotating part of the motor train unit, the vibration impact parameter, the wheel track working condition and the vibration impact parameter of the track required by anti-drop can be effectively monitored. The driving safety of the motor train unit is greatly improved.
Example 2:
referring to fig. 4 and 5, fig. 4 and 5 provide specific embodiments of the composite sensor in which the interior of the composite sensor is screwed, and fig. 4 is a sectional view of the interior of the base when screwed according to embodiment 2 of the present invention; fig. 5 is an exploded view of the composite sensor in the screw connection according to embodiment 2 of the present invention.
As shown in fig. 4 and 5, in this embodiment, to further facilitate the connection between the base 1 and the external device to be monitored, and also facilitate the connection between the base 1 and the first circuit board 2, the base 1 is preferably a hexagonal base, and the hexagonal base and the first circuit board 2 are rigidly connected by a screw connection. Of course, a soldered connection or other rigid connection may be used between the hexagonal base and the first circuit board 2.
In the following, take screw connection as the concrete introduction this scheme of example, this mode can realize the ingenious overall arrangement of multisystem in narrow and small base inner chamber to with vibration, impact, the required chip of temperature measurement in the high-speed motor car motion all integrate a little base, solved the limited problem of sensor installation among the prior art.
In this embodiment, an installation cavity 101 for installing the first circuit board 2 and the vibration impact sensitive device 3 is provided in the base 1 of the composite sensor, a first installation hole 102 for inserting the signal transmission line 6 and a second installation hole 103 for inserting the temperature probe 4 are provided on the side wall of the base 1, and the first installation hole 102 and the second installation hole 103 are both in conduction with the installation cavity 101.
When the first circuit board 2 is in screw connection with the base 1, a process hole 104 is formed in the side wall of the base 1, a screw 105 for fixing and limiting the first circuit board 2 is arranged in the process hole 104, a round cover plate 106 is arranged outside the screw 105, an opening 107 is formed in the side wall of the other part of the base 1, and a square cover plate 108 is arranged on the opening 107.
Example 3:
referring to fig. 6 to 8, fig. 6 is a schematic structural diagram of a first circuit board in the case of soldering connection according to embodiment 3 of the present invention; FIG. 7 is a sectional view showing the inside of the base when the welding is performed in accordance with embodiment 3 of the present invention; FIG. 8 is an explosion diagram of the composite sensor in the case of welded connection according to embodiment 3 of the present invention;
as shown in fig. 6 to 8, in this embodiment, in order to further facilitate the connection between the base 1 and the external device to be monitored, and also facilitate the connection between the base 1 and the first circuit board 2, the base 1 may preferably be a hexagonal base, and the hexagonal base and the first circuit board 2 are rigidly connected by welding. Of course, screw connection or other rigid connection methods can be adopted between the hexagonal base and the first circuit board 2.
In the following, take welded connection as the concrete introduction this scheme of example, this mode can realize the ingenious overall arrangement of multisystem in narrow and small base inner chamber to with vibration, impact, the required chip of temperature measurement in the high-speed motor car motion all integrate a little base, solved the limited problem of sensor installation among the prior art.
In this embodiment, when the first circuit board 2 is in welded connection with the base 1, the clamping grooves 109 are formed on both sides and the front end of the mounting cavity 101, the first circuit board 2 includes a sensing device portion 201 and a conditioning plate portion 202, the sensing device portion 201 is matched with the clamping grooves 109 on both sides of the mounting cavity 101, and the conditioning plate portion 202 is matched with the clamping grooves 109 on the front end of the mounting cavity 101.
Example 4:
referring to fig. 9 and 10, fig. 9 and 10 provide a specific embodiment of the first circuit board, wherein fig. 9 is a top view of the first circuit board disclosed in embodiment 4 of the present invention; fig. 10 is a front view of a first circuit board according to embodiment 4 of the present invention.
As shown in fig. 9 and 10, in this embodiment, in order to further facilitate the receiving and transmitting of the vibration and impact signals by the first circuit board 2, preferably, the first circuit board 2 includes a substrate 201, a circuit block 202 is disposed on the substrate 201, and a shielding cover 203 is disposed around the circuit block 202. In this way, the first circuit board 2 provided by the invention can be conducted with the shielding braid of the signal transmission line 6 (cable is selected in the embodiment), so that the whole shielding of the circuit of the first circuit board 2 and the cable core wire can be realized, in addition, the vibration impact sensitive device 3, the shielding cover 203 of the first circuit board 2 and the signal transmission line 6 are formed into a whole by adopting a potting process, and the extremely high reliability and the relatively strong electromagnetic interference resistance shielding function can be realized.
Example 5:
referring to fig. 11 and 12, fig. 11 and 12 provide two specific embodiments of the sheath, wherein fig. 11 is a schematic structural diagram of the armoured metal hose sheath disclosed in embodiment 5 of the present invention; FIG. 12 is a schematic view of a rubber hose jacket according to embodiment 5 of the present invention;
as shown in fig. 11 and 12, in this embodiment, to further ensure stability of signal transmission and prevent interference of signal transmission, preferably, a sheath 9 is sleeved outside the signal transmission line 6, the sheath 9 is an armored metal hose sheath or a rubber hose sheath, a locking cap 10 is disposed between the sheath 9 and the base 1, and a tube embedding 11 is disposed outside the locking cap 10. Of course, the locking cap 10 may be replaced by a threaded plug or other similar functional structure, and the embedded tube 11 may be replaced by an adapter or other similar functional structure.
Specifically, in fig. 11, the sheath 9 is an armored metal hose sheath, and a metal hose and armored connection process is adopted. In fig. 12, the sheath 9 is a rubber hose sheath, and a rubber hose pressurizing and connecting process is adopted. Wherein the threaded plug or locking cap 10 is used for reliably connecting a metal hose or a rubber hose respectively; the adapter or the embedded pipe 11 is used for reliably connecting the sheath 9 and the base 1, and through the connecting process, the tensile strength of the composite sensor provided by the invention can reach more than 500N, so that the signal transmission line 6 (such as a cable) in the sheath 9 can be effectively protected.
Example 6:
referring to fig. 13, fig. 13 provides a specific embodiment of a signal transmission line, where fig. 13 is a radial sectional view of the signal transmission line disclosed in embodiment 6 of the present invention.
As shown in fig. 13, in this embodiment, to further facilitate efficient signal transmission, prevent mutual interference between signals, and enhance signal transmission capability, preferably, the signal transmission line 6 includes a first cable 601 and a second cable 602, where the first cable 601 and the second cable 602 are individually shielded and insulated from each other, the first cable 601 is a silver-plated copper wire cable and the first cable 601 is connected to the temperature sensor 5 in the temperature probe 4, and the second cable 602 is a tin-plated copper wire cable and the second cable 602 is connected to the first circuit board 2.
Specifically, the first cable 601 and the second cable 602 in this embodiment are multicore shielded cables, in which the core conductor of the first cable 601 connected to the temperature sensitive device 5 in the temperature probe 4 is silver-plated copper wire, so that the cable impedance can be effectively reduced. The core conductor of the second cable 602 connected with the first circuit board 2 adopts tin-plated copper wires, so that vibration and impact signals can be effectively transmitted. The two cables are separated in the hexagonal base 1 and combined in the sheath 9 for output, so as to facilitate operation and withstand strong vibration impact; the two cables are respectively and independently shielded, are connected to the grounding end of the rear shielding layer in a conducting manner at the connector end of the composite sensor, and are combined with the shielding structure of the second circuit board 7 to have stronger shielding on electromagnetic interference.
Example 7:
referring to fig. 14, fig. 14 provides a specific embodiment of a temperature probe, wherein fig. 14 is a schematic structural diagram of the temperature probe disclosed in embodiment 7 of the present invention.
In this embodiment, as shown in fig. 14, preferably, the temperature probe 4 has a rod-shaped structure, at least two temperature sensing devices 5 are disposed at the top end of the inner cavity of the temperature probe 4, and pressure-resistant insulating films are disposed between the temperature sensing devices 5 and the inner wall of the temperature probe 4 and between different temperature sensing devices 5. The temperature sensing device 5 is provided with a thermal resistor or a thermocouple with remote temperature measuring capability.
Specifically, the temperature probe 4 in the scheme is preferably an elongated rod-shaped structure with a flange, the top end inside the temperature probe 4 comprises 1 or more medium-high temperature sensitive devices 5, and the temperature sensitive devices 5 adopt devices with remote temperature measurement such as thermal resistors or thermocouples and the like to sense the temperature in the range of-55 ℃ to 250 ℃. The temperature sensitive device 5 and the temperature probe 4 shell or a plurality of temperature sensitive devices 5 can be isolated by a thin barrel type high-withstand voltage insulating film, and are encapsulated by adopting heat conduction insulating glue, so that good temperature response and high insulation property can be effectively realized; the temperature sensitive device 5 and the cable are in compression joint or welding, the cable shielding braided layer and the sheath 9 outside the cable extend to the top of the temperature probe 4, and the cable and the middle part of the temperature probe 4 and the root (flange end) shell are encapsulated by high-strength sealant, so that tight sealing and strong tensile resistance are realized.
In addition, the temperature probe 4 can flexibly configure various probe lengths, detect multiple paths of temperatures and output multiple wiring modes, and meet the requirements of different installation position depths to be detected, the number of temperature detection paths and fixed lengths. The temperature sensor has the advantages of wide temperature measuring range, good thermal response, high insulation and sealing, strong tensile strength, flexible output configuration and high reliability.
Example 8:
referring to fig. 15 and 16, fig. 15 and 16 provide a specific embodiment of the connection between the second circuit board and the electrical connector, wherein fig. 15 and 16 are schematic diagrams of the connection between the second circuit board and the electrical connector disclosed in embodiment 8 of the present invention.
As shown in fig. 15 and 16, in the present embodiment, in cooperation with fig. 3, preferably, a fixing seat 12 is disposed between the second circuit 7 and the electrical connector 8, and a double-hole rubber plug 13 for sealing and isolating the inside and the outside of the electrical connector 8 is disposed outside the electrical connector 8. The electrical connector 8 is preferably a circular electrical connector or a rectangular connector.
Specifically, the electrical connector 8 provided in the present embodiment may be a circular electrical connector or a rectangular connector, and the second circuit board 7 is mounted inside the electrical connector 8, so as to implement normalized adjustment of vibration impact.
The second circuit board 7 is installed mainly in two types: the first type, the second circuit board 7 is welded on the welding seat, so that not only can the electric connection between the contact pin of the electric connector 8 and the second circuit board 7 be realized, but also the second circuit board 7 can be fixed, and the process is simple, convenient and high in reliability; second, the second circuit board 7 is fixed in the fixing base 12, wherein the second circuit board 7 is electrically connected with the pins of the electric connector 8 through a plurality of flexible wires, and then is installed in the clamping groove of the fixing base 12 embedded in the upper shell. Therefore, on the basis of realizing the pin communication between the second circuit board 7 and the electric connector 8, the internal insulation strength of the electric connector 8 can be improved by more than 2 times.
Overall, the composite sensor provided by the invention has the following beneficial effects:
1. the composite sensor shell provided by the invention is of a hexagonal base and probe structure, can effectively meet the requirement of the existing temperature sensor mounting interface, is internally provided with a temperature sensitive device which can detect high temperature of-55 ℃ to 250 ℃, is simultaneously provided with a vibration impact sensitive device to detect vibration generated by faults of a running part and impact caused by generalized resonance, and is a sensor for integrating temperature, vibration and impact composite detection;
2. the composite sensor provided by the invention can realize multi-axial vibration impact detection in different directions through different principles and different mounting modes of the first circuit board and the vibration impact sensitive device, and meets the requirements of running part fault monitoring diagnosis, derailment diagnosis and rail surface detection on vibration impact extraction;
3. the composite sensor provided by the invention can be connected and conducted through the first circuit board shielding structure and the double-shielding cable, and has stronger shielding on electromagnetic interference;
4. the composite sensor provided by the invention can be manufactured through the manufacturing processes of screw installation, laser welding, encapsulation, mechanical connection and the like, and has high reliability; the composite sensor is made of general materials such as stainless steel, low-smoke halogen-free cable, cable sheath, connector and the like, and has higher cost performance under the condition of realizing various configurations by combining an assembly process easy to manufacture.
The above describes in detail a compound sensor provided by the present invention. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (9)
1. The composite sensor is characterized by comprising a base, wherein a first circuit board is arranged in an inner cavity of the base and used for receiving and transmitting vibration and impact signals, a vibration impact sensitive device is arranged on the first circuit board and welded on the first circuit board by adopting a surface mounting process, a temperature probe is arranged on the side part of the base, a temperature sensitive device is arranged in the temperature probe, and signal transmission lines are respectively connected on the first circuit board and the temperature sensitive device;
the other end of the signal transmission line is connected with a second circuit board, the second circuit board is used for receiving, transmitting and normalizing vibration, impact and temperature signals, and an electric connector is sleeved outside the second circuit board;
the base is internally provided with a mounting cavity for mounting the first circuit board and the vibration impact sensitive device, the side wall of the base is provided with a first mounting hole for penetrating the signal transmission line and a second mounting hole for penetrating the temperature probe, and the first mounting hole and the second mounting hole are communicated with the mounting cavity;
the signal transmission line comprises a first cable and a second cable, the first cable and the second cable are mutually shielded and insulated, the first cable is connected with a temperature sensitive device in the temperature probe, and the second cable is connected with the first circuit board;
the first circuit board is rigidly connected with the base, and specifically comprises:
the first circuit board is connected with the base through screws, wherein a process hole is formed in the side wall of the base, screws used for fixing and limiting the first circuit board are arranged in the process hole, a round cover plate is arranged outside the screws, an opening is formed in the side wall of the other position of the base, and a square cover plate is arranged on the opening;
or, the first circuit board is in welded connection with the base, wherein clamping grooves are formed in the two sides and the front end of the installation cavity, the first circuit board comprises a sensitive device part and a conditioning plate part, the sensitive device part is matched with the clamping grooves in the two sides of the installation cavity, and the conditioning plate part is matched with the clamping grooves in the front end of the installation cavity.
2. The composite sensor of claim 1, wherein the first circuit board comprises a substrate, a circuit block is disposed on the substrate, and a shield is disposed around the circuit block.
3. The composite sensor of claim 1, wherein the vibration-shock-sensitive device is a triaxial vibration-shock-sensitive device that can detect vibration shocks in three dimensions of X, Y, Z in three-dimensional space.
4. The composite sensor according to claim 1, wherein a sheath is sleeved outside the signal transmission line, the sheath is an armored metal hose sheath or a rubber hose sheath, a threaded plug or a locking cap is arranged between the sheath and the base, and an adapter or an embedded pipe is arranged outside the threaded plug or the locking cap.
5. The composite sensor of claim 1, wherein the first cable is a silver-plated copper wire cable and the second cable is a tin-plated copper wire cable.
6. The composite sensor according to claim 1, wherein the temperature probe has a rod-shaped structure, at least two temperature sensitive devices are arranged at the top end of the inner cavity of the temperature probe, and pressure-resistant insulating films are arranged between the temperature sensitive devices and the inner wall of the temperature probe and between different temperature sensitive devices.
7. The composite sensor of claim 1, wherein a thermal resistor or thermocouple with remote temperature measurement capability is provided on the temperature sensitive device.
8. The composite sensor of claim 1, wherein a fixing seat is arranged between the second circuit board and the electric connector, and a double-hole rubber plug for sealing and isolating the inside and the outside of the electric connector is arranged outside the electric connector.
9. The composite sensor of claim 1, wherein the electrical connector is a circular electrical connector or a rectangular connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565541.7A CN108955762B (en) | 2018-06-04 | 2018-06-04 | Composite sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565541.7A CN108955762B (en) | 2018-06-04 | 2018-06-04 | Composite sensor |
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| CN108955762A CN108955762A (en) | 2018-12-07 |
| CN108955762B true CN108955762B (en) | 2024-03-22 |
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| CN201810565541.7A Active CN108955762B (en) | 2018-06-04 | 2018-06-04 | Composite sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112067059B (en) * | 2020-11-13 | 2021-04-20 | 宁波中车时代传感技术有限公司 | Temperature vibration composite sensor and manufacturing method thereof |
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| CN102844648A (en) * | 2010-04-12 | 2012-12-26 | 斯奈克玛 | Device for measuring the temperature in a flow channel of the primary flow of a bypass turbojet engine |
| DE212016000001U1 (en) * | 2015-06-08 | 2016-09-29 | Ema Precision Electronics (Suzhou) Co., Ltd. | Flow temperature sensor with acid-proof, alkali-resistant and fully metallic housing |
| CN205691307U (en) * | 2016-06-01 | 2016-11-16 | 唐智科技湖南发展有限公司 | A kind of compound sensor detecting vibration, impact, temperature in high temperature environments |
| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
| CN208282863U (en) * | 2018-06-04 | 2018-12-25 | 唐智科技湖南发展有限公司 | A kind of compound sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7665890B2 (en) * | 2006-06-22 | 2010-02-23 | Watlow Electric Manufacturing Company | Temperature sensor assembly and method of manufacturing thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102844648A (en) * | 2010-04-12 | 2012-12-26 | 斯奈克玛 | Device for measuring the temperature in a flow channel of the primary flow of a bypass turbojet engine |
| DE212016000001U1 (en) * | 2015-06-08 | 2016-09-29 | Ema Precision Electronics (Suzhou) Co., Ltd. | Flow temperature sensor with acid-proof, alkali-resistant and fully metallic housing |
| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
| CN205691307U (en) * | 2016-06-01 | 2016-11-16 | 唐智科技湖南发展有限公司 | A kind of compound sensor detecting vibration, impact, temperature in high temperature environments |
| CN208282863U (en) * | 2018-06-04 | 2018-12-25 | 唐智科技湖南发展有限公司 | A kind of compound sensor |
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| CN108955762A (en) | 2018-12-07 |
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