CN202994824U - Intelligent three-way acceleration sensor - Google Patents
Intelligent three-way acceleration sensor Download PDFInfo
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- CN202994824U CN202994824U CN 201220570529 CN201220570529U CN202994824U CN 202994824 U CN202994824 U CN 202994824U CN 201220570529 CN201220570529 CN 201220570529 CN 201220570529 U CN201220570529 U CN 201220570529U CN 202994824 U CN202994824 U CN 202994824U
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Abstract
The utility model discloses an intelligent three-way acceleration senor which comprises a base seat, a sensitive core, an insulating isolation ring, a pressing ring, an inner cap, an outer shell, an upper cap, a circuit board, a locating supporting column, leads, an output socket and self-checking sockets. The sensitive core is arranged inside the base seat through the pressing ring. The insulating isolation ring is arranged below the pressing ring so as to enable the sensitive core to be suspended. A base seat is encapsulated and shielded inside the base seat by the inner cap. The circuit board is arranged on the base seat through the locating supporting column and is connected with the sensitive core through the leads. The outer shell is arranged on the base seat. The output socket and the self-checking sockets are arranged on the outer shell. The output socket is connected with the circuit board. The self-checking sockets are respectively connected with the sensitive core and the circuit board. The upper cap is arranged on the outer shell. The intelligent three-way acceleration sensor is high in sensitivity and the operating temperature of the intelligent three-way acceleration sensor can reach 260 DEG C. In addition, the intelligent three-way acceleration sensor is small in size, good in reliability, small in three-way interference and superior in performance, has a self-checking function and can guarantee the accuracy and the reliability of the whole sensor.
Description
Technical field
The utility model belongs to sensor technical field, is specifically related to a kind of intelligent three-dimensional acceleration transducer.
Background technology
The vibration survey principle has pressure resistance type measurement, measurement by capacitance and piezoelectric type to measure.The sensitive core body of piezoresistance type acceleration sensor is that semiconductor material is made resistance meausring bridge, and its Structural Dynamic Model remains spring mass system, and subminiaturized design is its bright spot, but shortcoming is to be subjected to the impact of temperature larger, must carry out temperature compensation.The capacitive acceleration sensor structure form also adopts spring mass system, and is more for low frequency measurement in actual use, and its versatility is not as piezoelectric acceleration transducer, and non-linear relatively poor, range is limited, and cost is higher.
Piezoelectric acceleration transducer is take piezoelectric as conversion element, the primary instrument of the quantity of electric charge that output is directly proportional to acceleration.Because it has simple in structure, the series of advantages such as position-sensing unit is passive, no-movable part, rigidity large, wide dynamic range, frequency response are wide, reliable operation, become at present and used a kind of sensor widely in the impact shock measuring technique.As the high frequency of transmission of quantity value standard and the standard acceler of middle frequency vibration benchmark, mostly adopt piezoelectric structure in the world.this shows, piezoelectric acceleration transducer has high precision, the combination property that high reliability and long-time stability etc. are good, and the piezoelectric acceleration transducer range is large, bandwidth, volume is little, lightweight, install simple, easy-to-connect, be applicable to comparatively rugged environment condition, be widely used in space flight, aviation, weapons, boats and ships, weaving, agricultural machinery, vehicle, the vibration of each system such as electrical equipment, shock-testing, signal analysis, the mechanical dynamic experiment, the environment modal test, vibration calibration, industry monitoring, model analysis, fault diagnosis, optimal design etc.Its application quantity accounts for 80% left and right of various acceleration transducer sums at present used.
The utility model content
Goal of the invention: for the deficiencies in the prior art, the purpose of this utility model is to provide a kind of intelligent three-dimensional acceleration transducer, so that it has on the basis of the reliability of guaranteeing product, reduces as far as possible volume, makes product with compact structure, firm.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of intelligent three-dimensional acceleration transducer comprises pedestal, sensitive core body, insulation cage ring, trim ring, inner cap, shell, upper cover, circuit board, positioning pillars, lead-in wire, accessory power outlet and from seizure socket; Described sensitive core body is located in pedestal by trim ring, establishes the insulation cage ring below trim ring sensitive core body is suspended; Described inner cap shields the pedestal encapsulation in pedestal; Described circuit board is located on pedestal by positioning pillars, and described circuit board is connected with sensitive core body by lead-in wire; Establish shell on described pedestal, be provided with accessory power outlet and from seizure socket on shell; Described accessory power outlet is connected with circuit board; Describedly be connected respectively with circuit board with sensitive core body from seizure socket; Establish upper cover on described shell.
Be provided with the circuit that is formed by several components and parts on described circuit board, described circuit comprises charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit, amplifier and amplitude limiter circuit, described charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit are connected with amplifier and are connected, and described amplitude limiter circuit is connected with amplifier; Described high-pass filtering circuit is connected respectively with the loading self-checking circuit with charge amplifying circuit.
Described sensitive core body comprises tight loop, centre strut, piezoelectric ceramics and mass, and described piezoelectric ceramics is established mass around the centre strut setting outside piezoelectric ceramics, and described tight loop is from outside fastening quality piece.
The piezoelectric ceramics of this sensitive core body has high-Curie-point (more than 470 ℃), high tension electricity coefficient d33 greater than characteristics such as 450 pC/N, thereby guarantees the highly sensitive of sensor core, and serviceability temperature can reach 260 ℃.In addition, this sensitive core body adopts the three-dimensional shear constitution, namely on same square centre strut, with memorial alloy ring (tight loop) with three each other piezoelectric ceramics and the mass on vertical direction tighten together, volume is little, good reliability, and the three-dimensional interphase interference is little.
Beneficial effect: compared with prior art, intelligent three-dimensional acceleration transducer of the present utility model has following advantage:
(1) the core position-sensing unit has adopted and has had high-Curie-point (more than 470 ℃), and d33 is greater than the piezoelectric ceramics of 450 pC/N high tension electricity coefficients, thereby guarantees the highly sensitive of sensor core, and serviceability temperature can reach 260 ℃;
(2) adopt the three-dimensional shear constitution, on same square centre strut, with the memorial alloy ring with three each other piezoelectric ceramics and the mass on vertical direction tighten together, technique is new, volume is little, good reliability, the three-dimensional interphase interference is little;
(3) adopt the internal insulation double-layer shielding structure, suppress to greatest extent external disturbance, obtain better interference free performance;
(4) in a sensor, on three vertical each other directions, all export the acceleration of two different sensitivity respectively;
(5) have self-checking function, the height integrated charge amplifies conversion, high low-pass filtering, displacement amplitude limiter circuit, guarantees precision and the reliability of whole sensor signal.
Description of drawings
Fig. 1 is the structural representation of intelligent three-dimensional acceleration transducer;
Fig. 2 is the circuit theory schematic diagram of intelligent three-dimensional acceleration transducer;
Fig. 3 is the structural representation of sensitive core body.
Embodiment
Further illustrate the utility model below in conjunction with accompanying drawing, this embodiment is implemented under take technical solutions of the utility model as prerequisite, should understand these modes and only be used for explanation the utility model and be not used in restriction scope of the present utility model.
as shown in Figure 1, intelligent three-dimensional acceleration transducer comprises pedestal 1, sensitive core body 2, insulation cage ring 3, trim ring 4, inner cap 5, shell 6, upper cover 7, circuit board 8, positioning pillars 10, lead-in wire 11, accessory power outlet 12 and from seizure socket 13, with trim ring 4, sensitive core body 2 is fixed in pedestal 1, the middle insulation cage ring 3 of using is with sensitive core body 2 and pedestal 1 isolation, then with inner cap with holes 5 encapsulation shielding sensitive core body 2, circuit board 8 use positioning pillars 10 are fixed on pedestal 1, the lead-in wire 11 of sensitive core body 2 is received the input end of circuit board 8 by the eyelet welding on inner cap 5, with being housed, two shells 6 from seizure socket 13 and accessory power outlet 12 are contained on pedestal 1, and self check service wire and the output lead of circuit board 8 is welded to respectively from seizure socket 13 and accessory power outlet 12, at last four screws of upper cover 7 use and shell 6 and pedestal 1 are fixed together.Wherein, sensitive core body 2 is for having high-Curie-point (more than 470 ℃), and d33 is greater than the piezoelectric ceramics of 450 pC/N high tension electricity coefficients, pedestal 1,, trim ring 4, inner cap 5 and the preferred metal material that adopts of positioning pillars 10.
On circuit board 8 by the circuit that is formed by several components and parts 9, as shown in Figure 2, comprise charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit, amplifier and amplitude limiter circuit, charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit are connected with amplifier and are connected, and amplitude limiter circuit is connected with amplifier; High-pass filtering circuit is connected with the loading self-checking circuit.Charge amplifying circuit: will be converted to voltage signal from the charge signal that the sensor piezoelectric chip transmits and amplify; The self check voltage signal is charge signal via a capacitance simulation, and whole circuit is detected.The self-test signal input end adopts the operational amplifier of low noise, high impedance (input impedance reaches more than 1012) to guarantee that whole circuit meets designing requirement fully.
High-pass filtering circuit is used for the unwanted low-frequency component of filtering.Low-pass filter circuit is used for the unwanted radio-frequency component of filtering.Biasing circuit is used for providing required total null voltage.Amplitude limiter circuit is used for setting required limiting voltage, and physical circuit can appropriately adjust according to actual needs.Amplifier is used for amplification, adjustment, output signal.
As shown in Figure 3, sensitive core body 2 comprises tight loop 21, centre strut 22, piezoelectric ceramics 23 and mass 24, and piezoelectric ceramics 23 arranges around square centre strut 22, establishes mass 24 in piezoelectric ceramics 23 outsides, and tight loop 21 is from outside fastening quality piece 24.This piezoelectric ceramics 23 has high-Curie-point (more than 470 ℃), high tension electricity coefficient d33 greater than characteristics such as 450 pC/N, thereby guarantees the highly sensitive of sensor core, and serviceability temperature can reach 260 ℃.In addition, this sensitive core body adopts the three-dimensional shear constitution, namely on same square centre strut 22, with memorial alloy ring (tight loop 21) with three each other piezoelectric ceramics 23 and the mass 24 on vertical direction tighten together, volume is little, good reliability, and the three-dimensional interphase interference is little.
the course of work of this intelligence three-dimensional acceleration transducer: install this patent sensor on object under test, the vibration of object under test passes to this sensor, mass in sensor produces inertial force and is applied to piezoelectric ceramic devices, thereby produce the high resistant charge signal that acting force therewith is directly proportional on the piezoelectric ceramics surface, this charge signal is connected to input end on circuit board by lead-in wire, then change the low-resistance voltage signal into through charge amplifying circuit respectively, through too high, the unwanted high and low frequency composition of low-pass filter circuit filtering, export by amplitude limiting amplifier circuit at last.
This intelligence three-dimensional acceleration transducer, inner sensitive core body adopt the isolation double shield, have good interference free performance; Integrated level is high, sensor quite with a hyperchannel vibration detecting system, volume is little; Save simultaneously a large amount of external cables, reliability is high; The band self-checking function guarantees that system can reliably working.
The utility model is to have made up the acceleration transducer that the three-way piezoelectric accelerometer of two different sensitivity is integrated, and on vertical direction, two kinds of sensitivity outputs of height are arranged each other three of X, Y, Z, the circuit such as in-built adjusting amplification filtering, and have self-checking function, it is on measuring simultaneously a bit, the vibration acceleration of the low frequency of vertical xyz three two kinds of ranges on axially is custom-designed each other.Three-dimensional shear constitution with innovation is convenient to Installation and Debugging structural design, internal insulation double shield structure and is improved antijamming capability, and volume is little, and integrated level is high, be a kind of novel intelligence sensor.Each all has two kinds of charge sensitivities of height and good lateral characteristics to sensor, therefore in low frequency vibration measurement, especially need measure in the experiment of component of acceleration on a plurality of different directions of same point has important use, and it also can be used for the dynamic monitoring instrument system of large scale structure large impact.
Claims (4)
1. intelligent three-dimensional acceleration transducer is characterized in that: comprise pedestal (1), sensitive core body (2), insulation cage ring (3), trim ring (4), inner cap (5), shell (6), upper cover (7), circuit board (8), positioning pillars (10), lead-in wire (11), accessory power outlet (12) and from seizure socket (13); Described sensitive core body (2) is located in pedestal (1) by trim ring (4), establishes insulation cage ring (3) in the below of trim ring (4) sensitive core body (2) is suspended; Described inner cap (5) shields pedestal (1) encapsulation in pedestal (1); Described circuit board (8) is located on pedestal (1) by positioning pillars (10), and described circuit board (8) is connected with sensitive core body (2) by lead-in wire (11); Establish shell (6) on described pedestal (1), be provided with accessory power outlet (12) and from seizure socket (13) on shell (6); Described accessory power outlet (12) is connected with circuit board (8); Describedly be connected respectively with circuit board (8) with sensitive core body (2) from seizure socket (13); Establish upper cover (7) on described shell (6).
2. intelligent three-dimensional acceleration transducer according to claim 1, it is characterized in that: be provided with the circuit that is formed by several components and parts (9) on described circuit board (8), described circuit comprises charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit, amplifier and amplitude limiter circuit, described charge amplifying circuit, high-pass filtering circuit, low-pass filter circuit, biasing circuit are connected with amplifier and are connected, and described amplitude limiter circuit is connected with amplifier; Described high-pass filtering circuit is connected respectively with the loading self-checking circuit with charge amplifying circuit.
3. intelligent three-dimensional acceleration transducer according to claim 1, it is characterized in that: described sensitive core body (2) is the piezoelectric ceramics sensitive core body.
4. according to claim 1 or 3 described intelligent three-dimensional acceleration transducers, it is characterized in that: described sensitive core body (2) comprises tight loop (21), centre strut (22), piezoelectric ceramics (23) and mass (24), described piezoelectric ceramics (23) arranges around centre strut (22), establish mass (24) outside piezoelectric ceramics (23), described tight loop (21) is from outside fastening quality piece (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570529 CN202994824U (en) | 2012-11-01 | 2012-11-01 | Intelligent three-way acceleration sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570529 CN202994824U (en) | 2012-11-01 | 2012-11-01 | Intelligent three-way acceleration sensor |
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| CN202994824U true CN202994824U (en) | 2013-06-12 |
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| CN 201220570529 Expired - Lifetime CN202994824U (en) | 2012-11-01 | 2012-11-01 | Intelligent three-way acceleration sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901841A (en) * | 2012-11-01 | 2013-01-30 | 江苏联能电子技术有限公司 | Intelligent three-direction acceleration sensor |
| CN103954795A (en) * | 2014-04-30 | 2014-07-30 | 中国科学院地质与地球物理研究所 | MEMS accelerometer capable of being engineered |
| CN109725174A (en) * | 2019-03-07 | 2019-05-07 | 中国船舶重工集团公司第七0四研究所 | Composite vibrating acceleration transducer |
| CN110133711A (en) * | 2018-02-08 | 2019-08-16 | 东营市智威石油技术有限责任公司 | A kind of piezoelectric type acceleration type wave detector machine core |
| CN112857558A (en) * | 2021-01-08 | 2021-05-28 | 山东科大机电科技股份有限公司 | Structure of vibration sensing equipment and anti-interference method of sensing equipment |
-
2012
- 2012-11-01 CN CN 201220570529 patent/CN202994824U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901841A (en) * | 2012-11-01 | 2013-01-30 | 江苏联能电子技术有限公司 | Intelligent three-direction acceleration sensor |
| CN103954795A (en) * | 2014-04-30 | 2014-07-30 | 中国科学院地质与地球物理研究所 | MEMS accelerometer capable of being engineered |
| CN110133711A (en) * | 2018-02-08 | 2019-08-16 | 东营市智威石油技术有限责任公司 | A kind of piezoelectric type acceleration type wave detector machine core |
| CN109725174A (en) * | 2019-03-07 | 2019-05-07 | 中国船舶重工集团公司第七0四研究所 | Composite vibrating acceleration transducer |
| CN109725174B (en) * | 2019-03-07 | 2024-04-30 | 中国船舶重工集团公司第七0四研究所 | Composite vibration acceleration sensor |
| CN112857558A (en) * | 2021-01-08 | 2021-05-28 | 山东科大机电科技股份有限公司 | Structure of vibration sensing equipment and anti-interference method of sensing equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |