CN211528463U - Temperature impact composite sensor - Google Patents
Temperature impact composite sensor Download PDFInfo
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- CN211528463U CN211528463U CN201921630533.2U CN201921630533U CN211528463U CN 211528463 U CN211528463 U CN 211528463U CN 201921630533 U CN201921630533 U CN 201921630533U CN 211528463 U CN211528463 U CN 211528463U
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Abstract
The utility model relates to a temperature impact composite sensor, which comprises a temperature probe, a shell, an impact sensitive element base, a signal processing unit, a side cover plate and a cable assembly, wherein the shell is of a hollow structure, and the temperature probe is fixed on the shell and is used for acquiring temperature information in the sensitive range and transmitting the temperature information to the signal processing unit; the impact sensitive element base is arranged on the inner wall of the shell, and the impact sensitive element is arranged on the impact sensitive element base, is arranged in the shell and is used for collecting vibration impact information in a sensitive range and transmitting the vibration impact information to the signal processing unit. The utility model is used for on railway train or other large-scale mechanical vehicle, have simple structure, reliable operation, integrated level height, light in weight, installation convenient to use's characteristics.
Description
Technical Field
The utility model relates to a temperature strikes compound sensor belongs to the sensor field.
Background
The temperature and impact parameters are important indexes which need to be monitored in a power system in a large-sized vehicle, and the index parameters are important conditions for judging the working condition of the power system. The temperature sensors and the impact sensitive elements (3) are various and are widely applied to various large-scale test systems.
The impact sensitive element mainly comprises an impact sensitive element for measuring acceleration signals and a signal processing unit, and the temperature sensor mainly comprises a thermal resistor and a signal processing unit thereof. The impact sensitive element is generally made of piezoelectric ceramics; the thermal resistor is mainly made of related materials of which the resistance value and the ambient temperature are in a linear relation; the signal processing unit is used for processing and transmitting signals, and reliable recognition of the signals by external equipment after the signals are sent is guaranteed.
The temperature sensor and the impact sensor of the old split type product are respectively arranged in different products, and simultaneously, each sensor is respectively matched with and provided with a signal converter comprising a signal processing unit. The sensors and the transducers need to be connected to each other by cables. The volume and the mass of the whole set of product are large; for users, the split design is adopted, the defects of inconvenience in use, relatively complex installation steps and the like exist, meanwhile, the split structure has a cable connection link between the sensor and the signal converter, unreliable factors are increased, faults can be caused by the problems of poor contact of a connector, redundancy, connector failure and the like in use, and the influence of interference brought by the low-noise cable connection is also inevitable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's above-mentioned defect, provide integration temperature and strike compound sensor, can pick up temperature and impact signal and convert the signal of telecommunication that follow-up equipment can directly read into, can be applied to the civilian field that high reliability required.
The above object of the present invention is achieved by the following technical solutions:
a temperature impact composite sensor comprises a temperature probe, a shell, an impact sensitive element base, a signal processing unit, a side cover plate and a cable assembly, wherein the shell is of a hollow structure, and the temperature probe is fixed on the shell and used for acquiring temperature information within a sensitive range and transmitting the temperature information to the signal processing unit;
the shock sensitive element base is arranged on the inner wall of the shell, the shock sensitive element is arranged on the shock sensitive element base and is arranged in the shell and used for collecting vibration shock information in the sensitive range of the shock sensitive element base and transmitting the vibration shock information to the signal processing unit;
the side cover plate is arranged at the opening end of the shell to form a closed space;
the cable assembly is installed on the side cover plate, the signal processing unit converts the charge signal of the vibration impact information into a current signal, and the signal processing unit transmits the temperature information and the current signal to external equipment through the cable assembly.
Preferably, the temperature probe is formed by combining one or more temperature sensitive elements with a metal tube closed at one end.
Further, the open end of the metal pipe is fixedly connected with the shell through a thread or a welding mode.
Further, the inner surface of the case is chemically or physically insulated so as not to be broken down at 2500V ac voltage.
Further, the impact sensitive element is a piezoelectric ceramic component capable of converting an acceleration signal into an electric charge.
Furthermore, the contact surface of the shock sensitive element base and the shock sensitive element is completely or partially insulated, so that the shock sensitive element base is not broken down under 2500V alternating voltage.
Further, the included angle between the cable assembly and the contact surface of the side cover plate ranges from 90 degrees to 125 degrees.
Furthermore, one end of the cable assembly is connected with the side cover plate through threads, and the other end of the cable assembly is a free end with a connector used for transmitting electric signals.
Furthermore, the side cover plate and the contact side inside the shell are insulated, so that the side cover plate is not broken down under 2500V alternating voltage.
Further, the impact vibration information includes frequency and amplitude information of the acceleration.
Compared with the prior art, the utility model have following advantage:
(1) the utility model discloses carried out innovative design to sensor structure, made temperature probe, impact sensing element and signal processing unit as an organic whole, reduced holistic volume and quality greatly, simultaneously because remove the connecting cable between traditional sensor and the signal converter, eliminated because various interference that the cable brought and reduced the loss of original signal by a wide margin;
(2) the utility model discloses adopt multiple mode to the inside mechanism of sensor to carry out insulation treatment to solved the circuit protection problem of this product under high voltage impact operational environment.
(3) The utility model discloses at the in-process of equipment, multiple equipment modes such as threaded fastener or laser welding can be adopted to the combined sensor main part, combines ordinary cable or watertight cable, assembles applicable in various test environment behind the complete machine.
(4) The utility model discloses the temperature strikes composite sensor structure and adopts the integral type design, and the product has characteristics such as the reliability is high, the response is fast, small, light in weight, can be applied to military use, civilian field that high reliability required.
Drawings
FIG. 1 is a sectional view of the temperature impact composite sensor structure of the present invention;
FIG. 2 is a schematic structural diagram of a signal processing unit module in the temperature impact composite sensor of the present invention;
FIG. 3 is a schematic circuit diagram of the power circuit of the present invention;
fig. 4 is a schematic circuit diagram of the charge amplifying circuit of the present invention;
fig. 5 is a schematic circuit diagram of the bias amplifier circuit of the present invention;
fig. 6 is a schematic circuit diagram of the V/I conversion circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows a sectional view of the temperature impact composite sensor structure of the present invention, the temperature impact composite sensor of the present invention comprises a temperature probe 1, a housing 2, an impact sensitive element 3, an impact sensitive element base 4, a signal processing unit 5, a side cover plate 6 and a cable assembly 7, wherein the housing 2 is a hollow structure, the temperature probe 1 is fixed on the housing 2 for collecting temperature information within the sensitive range thereof and transmitting the temperature information to the signal processing unit 5;
the impact sensitive element base 4 is arranged on the inner wall of the shell 2, the impact sensitive element 3 is arranged on the impact sensitive element base 4 and is arranged in the shell 2, and the impact sensitive element is used for collecting vibration impact information in a sensitive range and transmitting the vibration impact information to the signal processing unit 5;
the side cover plate 6 is arranged at the opening end of the shell 2, so that the shell 2 forms a closed space;
the cable assembly 7 is installed on the side cover plate 6, the signal processing unit 5 converts the charge signal of the vibration impact information into a current signal, and the signal processing unit 5 transmits the temperature information and the current signal to external equipment through the cable assembly 7.
Further, the inner surfaces of the case 2 and the side cover 6 are all insulated by plating, spraying or other means before assembly. The function of the protective circuit is to protect the internal circuit of the product from being damaged when the product is subjected to high voltage impact.
One or more temperature-sensitive resistors which are subjected to insulation treatment can be placed in the temperature probe 1, and the insulating material can be non-conductive adhesive which provides a fastening function. The function of the temperature-sensitive resistor is to convert the temperature change sensed by the temperature-sensitive resistor into an equal-ratio resistance change signal. The lead of the temperature sensitive resistor is led out from the opening end of the temperature probe 1 and then penetrates into the shell 2, and finally the temperature probe 1 is installed below the shell 2 in a threaded or welded mode.
The impact sensitive element base 4 can adopt various modes such as ceramic sintering, glue solution filling and sealing, base surface coating and the like to realize surface insulation treatment according to the difference of the selected impact sensitive elements, and has the function of isolating electric signals generated by the impact sensitive element 3 from other metal parts and the like to prevent charge signals from leaking. After the processing, the impact sensor 3 and the impact sensor base 4 are assembled into a combination, which functions to convert the sensed acceleration signal into an electrical charge signal that can be recognized by the signal processing unit 5. After the outgoing line penetrates into the shell 2, the outgoing line is finally installed above the shell 2 in a threaded or welded mode.
After the wire bonding of the signal processing unit 5, the impact sensor 3, and the temperature probe 1 is completed, the signal processing unit is mounted on the side surface inside the case 2 using a fastener. Meanwhile, a signal output cable is welded on the outgoing line surface of the cable.
The signal output cable is led out through a threaded hole of the side cover plate 6 and then is installed on the side surface of the shell 2 in a threaded or welded mode.
The connectors on the cable assembly 7 are mounted on the side cover plate 6 after the completion of the soldering and the soldering of the signal output lines.
The structure of the signal processing unit of the temperature impact composite sensor of the present invention is schematically shown in fig. 2, and the signal processing unit is composed of a power circuit, a charge amplifying circuit, a bias amplifying circuit and a V/I conversion circuit. The function is to process and adjust the charge signal input by the impact sensitive element 3 and output a current signal meeting the requirements of a subsequent signal processing unit. The power supply circuit has the functions ofThe internal circuit provides stable power supply; the charge amplifier circuit converts a high internal resistance charge source to a low internal resistance voltage source, and the output voltage is proportional to the input charge, the input impedance of which is typically up to 1010～1012Omega, the output impedance is generally less than 100 omega. The voltage signal processed by the charge amplifying circuit is continuously conditioned by the bias amplifying circuit, and the sensitivity of the sensor is adjusted to a proper range. The voltage/current V/I conversion circuit converts the voltage signal into a current signal meeting the requirements of a subsequent signal processing unit.
Fig. 3, fig. 4, fig. 5, and fig. 6 are schematic circuit diagrams of various modules of the signal processing unit module of the temperature impact composite sensor of the present invention, in which fig. 3 is a schematic circuit diagram of a power circuit using a high-precision reference source, the input terminal has a protection resistor R1, and the output terminal has a decoupling capacitor C10. Fig. 4 is a charge amplifying circuit, which uses an operational amplifier with high input impedance, and uses a +2.5V reference voltage to convert the zero crossing point of the vibration signal to the midpoint of the output range of the operational amplifier, so as to satisfy the dynamic range of the charge amplifying circuit when the single power supply supplies power. Fig. 5 shows that the bias amplifying circuit adjusts the voltage sensitivity of the charge amplifying circuit after conversion to a proper range to meet the technical requirements. With the inverse amplification circuit, the amplification factor can be adjusted through the R9 and the R7. Fig. 6 shows a voltage-current V/I conversion circuit, in which R10-R13 have the same resistance, and the conversion relationship is I-U/R14.
The above description is only for the best embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention.
The details of the present invention not described in detail in the specification are well known to those skilled in the art.
Claims (10)
1. A temperature impact composite sensor is characterized in that: the temperature sensor comprises a temperature probe (1), a shell (2), an impact sensitive element (3), an impact sensitive element base (4), a signal processing unit (5), a side cover plate (6) and a cable assembly (7), wherein the shell (2) is of a hollow structure, and the temperature probe (1) is fixed on the shell (2) and used for acquiring temperature information within a sensitive range of the temperature probe and transmitting the temperature information to the signal processing unit (5);
the shock sensitive element base (4) is arranged on the inner wall of the shell (2), the shock sensitive element (3) is arranged on the shock sensitive element base (4) and is arranged in the shell (2) and used for collecting vibration shock information in a sensitive range of the shock sensitive element and transmitting the vibration shock information to the signal processing unit (5);
the side cover plate (6) is arranged at the opening end of the shell (2) to ensure that the shell (2) forms a closed space;
the cable assembly (7) is installed on the side cover plate (6), the signal processing unit (5) converts charge signals of vibration impact information into current signals, and the signal processing unit (5) transmits the temperature information and the current signals to external equipment through the cable assembly (7).
2. A temperature impact composite sensor according to claim 1, wherein: the temperature probe (1) is formed by combining one or more temperature sensitive elements and a metal pipe with one closed end.
3. A temperature impact composite sensor according to claim 2, wherein: the open end of the metal pipe is fixedly connected with the shell (2) through threads or welding.
4. A temperature impact composite sensor according to claim 1, wherein: the inner surface of the shell (2) is insulated by chemical or physical method, so that the shell is not broken down under 2500V alternating voltage.
5. A temperature impact composite sensor according to claim 1, wherein: the shock sensitive element (3) is a piezoelectric ceramic component capable of converting an acceleration signal into electric charges.
6. A temperature impact composite sensor according to claim 1, wherein: the contact surface of the shock sensitive element base (4) and the shock sensitive element (3) is completely or partially insulated, so that the shock sensitive element base is not broken down under 2500V alternating voltage.
7. A temperature impact composite sensor according to claim 1, wherein: the included angle of the contact surface of the cable component (7) and the side cover plate (6) ranges from 90 degrees to 125 degrees.
8. A temperature impact composite sensor according to claim 1, wherein: one end of the cable component (7) is connected with the side cover plate (6) through threads, and the other end of the cable component is a free end with a connector used for transmitting electric signals.
9. A temperature impact composite sensor according to claim 1, wherein: the side cover plate (6) and the inner contact side of the shell (2) are insulated, so that the side cover plate is not broken down under 2500V alternating voltage.
10. A temperature impact composite sensor according to claim 1, wherein: the shock vibration information includes frequency and amplitude information of the acceleration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921630533.2U CN211528463U (en) | 2019-09-27 | 2019-09-27 | Temperature impact composite sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921630533.2U CN211528463U (en) | 2019-09-27 | 2019-09-27 | Temperature impact composite sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211528463U true CN211528463U (en) | 2020-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921630533.2U Active CN211528463U (en) | 2019-09-27 | 2019-09-27 | Temperature impact composite sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211528463U (en) |
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2019
- 2019-09-27 CN CN201921630533.2U patent/CN211528463U/en active Active
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