CN202143000U - Piezoelectric ceramic driver module and direct current solid-state relay - Google Patents
Piezoelectric ceramic driver module and direct current solid-state relay Download PDFInfo
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- CN202143000U CN202143000U CN201120234146U CN201120234146U CN202143000U CN 202143000 U CN202143000 U CN 202143000U CN 201120234146 U CN201120234146 U CN 201120234146U CN 201120234146 U CN201120234146 U CN 201120234146U CN 202143000 U CN202143000 U CN 202143000U
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Abstract
The utility model discloses a piezoelectric ceramic driver module and a direct current solid-state relay, and the technical problem to be solved is that a filed effect transistor of a power output element MOS (metal oxide semiconductor) in a direct current solid-state relay is driven so as to work stably. The piezoelectric ceramic driver module comprises a piezoelectric ceramic transformer with a strip rectangular flat-plate shaped isolation element, and a driver circuit, he piezoelectric ceramic transformer is provided with a driver part and an electricity generation part, areas corresponding to the driver part and the electricity generation part are respectively provided with a silver electrode and are welded with an elastic cooper line leading-out, and the silver electrodes and the elastic cooper line leading-outs are respectively taken as the output ends and the input ends of the piezoelectric transformer. The piezoelectric ceramic driver module outputs high voltage so as to drive the field effect transistor of the power output element MOS of the direct current solid-state relay to work normally in the range being minus 50 DEG C and 90 DEG C and enable the field effect transistor to have good temperature property. The piezoelectric ceramic driver module and the direct current solid-state relay have simple structures, low cost and strong ability of interference resistance and impact resistance.
Description
Technical field
The utility model relates to a kind of Piezoelectric Driving module and has the relay of this Piezoelectric Ceramic module, particularly a kind of Piezoelectric Ceramic module and have the solid state relay of this Piezoelectric Ceramic module.
Background technology
Contactless solid-state relay has two kinds of AC load (title ac solid relay) and DC loads (title direct-current solid-state relay).Present ac solid relay is to adopt to exchange photoelectrical coupler, Piezoelectric Ceramic Coupling device and isolation of differential piezoelectric ceramic transformer do and pushing member, and the isolation and the pushing member that are used as direct-current solid-state relay have only the direct current photoelectrical coupler.
Piezoelectric Ceramic Coupling device and differential piezoelectric ceramic transformer are as the isolation and the pushing member of ac solid relay; Process solid state relay with it; Have performance and price advantage though exchange photoelectricity coupling solid state relay; But still be in laboratory stage at present, and from the product to market, still have a bigger segment distance.And exchange photoelectrical coupler, Piezoelectric Ceramic Coupling device and differential piezoelectric ceramic transformer because output voltage is lower; If isolation and pushing member as direct-current solid-state relay; Then be not enough to promote the power output element MOS field-effect transistor work in the direct-current solid-state relay; Though adopt the direct current photoelectrical coupler can improve output voltage as the isolation and the pushing member of direct-current solid-state relay, its temperature characterisitic is poor, manufacturing cost is very big.
Summary of the invention
The purpose of the utility model provides a kind of Piezoelectric Ceramic module and direct-current solid-state relay, and the technical problem that solve is to drive the power output element MOS field-effect transistor in the direct-current solid-state relay and make it steady operation.
The technical scheme that the utility model adopted:
The Piezoelectric Ceramic module of the utility model; Comprise isolated component and drive circuit; Said isolated component is the piezoelectric ceramic transformer of elongated rectangular shape writing board shape; On described piezoelectric ceramic transformer, be respectively equipped with drive part that links to each other with its input and the power generation part that links to each other with its output, described drive circuit links to each other with the input of described piezoelectric ceramic transformer.
Described drive part is located at described elongated rectangular shape flat board along in the intermediate range of long side direction; Its shared volume is the half the of the dull and stereotyped volume of elongated rectangular shape; Prepare silver electrode in the dull and stereotyped corresponding zone of upper and lower surface drive part of elongated rectangular shape and the elasticity copper cash of burn-oning is respectively drawn; As two inputs of described piezoelectric ceramic transformer, described power generation part is symmetrically distributed in the drive part both sides, and the shared volume of its every side is 1/4 of the dull and stereotyped volume of elongated rectangular shape; Be positioned at power generation part that two dull and stereotyped end faces of elongated rectangular shape prepare silver electrode and the elasticity copper cash of burn-oning is respectively drawn, as two outputs of piezoelectric ceramic transformer.
Said drive circuit is made up of input circuit, bridge-type sine wave oscillation circuit, wherein;
The 1st electric capacity in the input circuit is connected between input power supply and the earth terminal, and one of the 2nd resistance is terminated at the input power supply, and its other end is through the parallelly connected ground connection of the 6th resistance with the 3rd electric capacity, and the 1st resistance inserts between the output of input power supply and operational amplifier;
The bridge-type sine wave oscillation circuit mainly is made up of the bridge circuit that operational amplifier, coupled 4 support arms that connect constitute; One of the 1st support arm is terminated at the output of operational amplifier, and the other end is through the in-phase input end that is connected in series in operational amplifier of the input of the 7th resistance and piezoelectric ceramic transformer; One of the 2nd support arm is terminated at the in-phase input end of operational amplifier, and the other end is through an end that is connected in the 6th resistance, the parallel connection of the 3rd electric capacity of the 5th resistance, the 2nd electric capacity, and the parallelly connected ground connection of passing through the 6th resistance, the 3rd electric capacity; One of the 3rd support arm is terminated at the inverting input of operational amplifier, and the other end is connected to the output of operational amplifier through the 3rd resistance; One of the 4th support arm is terminated at the inverting input of operational amplifier, and the other end is through the 4th resistance, the 6th resistance parallelly connected ground connection with the 3rd electric capacity.
The direct-current solid-state relay of the utility model; Comprise piezoelectric ceramic transformer driver module, MOS field-effect transistor and input thereof, output circuit; Described piezoelectric ceramic transformer driver module comprises isolated component and drive circuit; Said isolated component is the piezoelectric ceramic transformer of elongated rectangular shape writing board shape; On described piezoelectric ceramic transformer, be respectively equipped with drive part that links to each other with its input and the power generation part that links to each other with its output; Described drive circuit links to each other with the input of described piezoelectric ceramic transformer, and the output of said piezoelectric ceramic transformer links to each other with two inputs of the bridge rectifier be made up of two double diodes in the input circuit of described MOS field-effect transistor respectively.
The input circuit of described MOS field-effect transistor is by two double diodes, the 8th resistance, the 4th electric capacity, voltage-stabiliser tube, and rectification, filtering and voltage stabilizing circuit that kenotron, PNP transistor, the 9th resistance constitute are formed.
The utility model compared with prior art; Adopt the both ends of the surface output voltage of piezoelectric ceramic transformer; Can make the Piezoelectric Ceramic module obtain the higher voltage signal, the output voltage that the Piezoelectric Ceramic module is higher is enough to drive the steady operation of the MOS field-effect transistor of direct current relay output circuit; Overcome the low shortcoming of output voltage that exchanges photoelectrical coupler, Piezoelectric Ceramic Coupling device and differential piezoelectric ceramic transformer; And good temperature characterisitic is arranged, direct-current solid-state relay can be in-50 ℃ to 90 ℃ scope operate as normal, in addition the utility model simple in structure, with low cost, have stronger anti-interference and an impact resistance.
Description of drawings
Fig. 1 is the piezoelectric ceramic transformer structure chart of the utility model.
Fig. 2 is the Piezoelectric Ceramic modular circuit schematic diagram of the utility model.
Fig. 3 is the direct-current solid-state relay block diagram of the utility model.
Fig. 4 is the direct-current solid-state relay circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.Like Fig. 1, shown in 2; The Piezoelectric Ceramic module of the utility model; Comprise isolated component and drive circuit 5; Described isolated component is the piezoelectric ceramic transformer 6 of elongated rectangular shape writing board shape, on described piezoelectric ceramic transformer 6, is respectively equipped with drive part 61 that links to each other with its input 1,2 and the power generation part 62 that links to each other with its output 3,4, and described drive circuit 5 links to each other with the input 1,2 of described piezoelectric ceramic transformer 6.
Described drive part 61 is located at described elongated rectangular shape flat board along in the intermediate range of long side direction; Its shared volume is the half the of the dull and stereotyped volume of elongated rectangular shape; Prepare silver electrode in the dull and stereotyped upper and lower surface drive part 61 corresponding zones of elongated rectangular shape and the elasticity copper cash of burn-oning is respectively drawn; Two inputs 1,2 as described piezoelectric ceramic transformer 6; Described power generation part 62 is symmetrically distributed in drive part 61 both sides; The shared volume of its every side is 1/4 of the dull and stereotyped volume of elongated rectangular shape, is positioned at power generation part 62 that two dull and stereotyped end faces of elongated rectangular shape prepare silver electrode and the elasticity copper cash of burn-oning is respectively drawn, as two outputs 3,4 of piezoelectric ceramic transformer 6.
Said drive circuit 5 is made up of input circuit, bridge-type sine wave oscillation circuit, wherein;
The 1st capacitor C 1 in the input circuit is connected between input power supply and the earth terminal; One of the 2nd resistance R 2 is terminated at the input power supply; Its other end is through the parallelly connected ground connection of the 6th resistance R 6 with the 3rd capacitor C 3, and the 1st resistance R 1 inserts between the output of input power supply and operational amplifier U1;
The bridge-type sine wave oscillation circuit mainly is made up of the bridge circuit that operational amplifier U1, coupled 4 support arms that connect constitute; One of the 1st support arm is terminated at the output of operational amplifier U1, the in-phase input end that be connected in series in operational amplifier U1 of the other end through the 7th resistance R 7 and the input 1,2 of piezoelectric ceramic transformer 6+; One of the 2nd support arm be terminated at the in-phase input end of operational amplifier U1+, the other end is through an end that is connected in 3 parallel connections of the 6th resistance R the 6, the 3rd capacitor C of the 5th resistance R the 5, the 2nd capacitor C 2, and the parallelly connected ground connection through the 6th resistance R the 6, the 3rd capacitor C 3; One of the 3rd support arm be terminated at the inverting input of operational amplifier U1-, the other end connects the output of operational amplifier U1 through the 3rd resistance R 3; One of the 4th support arm be terminated at the inverting input of operational amplifier U1-, the other end is through the parallelly connected ground connection of the 4th resistance R the 4, the 6th resistance R 6 with the 3rd capacitor C 3.
The direct-current solid-state relay of the utility model; Comprise piezoelectric ceramic transformer driver module, MOS field-effect transistor Q1 and input thereof, output circuit 7,8; Wherein, Described piezoelectric ceramic transformer driver module comprises isolated component and drive circuit 5; Said isolated component is the piezoelectric ceramic transformer 6 of elongated rectangular shape writing board shape; On described piezoelectric ceramic transformer 6, be respectively equipped with drive part 61 that links to each other with its input 1,2 and the power generation part 62 that links to each other with its output 3,4, described drive circuit 5 links to each other with the input 1,2 of described piezoelectric ceramic transformer 6, and the output 3,4 of said piezoelectric ceramic transformer 6 links to each other with two inputs of the bridge rectifier be made up of two double diode D1, D2 in the input circuit 7 of described MOS field-effect transistor Q1 respectively.
The input circuit 7 of described MOS field-effect transistor Q1 is by two double diode D1, D2, the 8th resistance R the 8, the 4th capacitor C 4, voltage-stabiliser tube D3; Rectification, filtering and voltage stabilizing circuit that kenotron D4, PNP transistor Q2, the 9th resistance R 9 constitute are formed, and the output circuit of described MOS field-effect transistor Q1 is load R
LLoop with load DC power supply composition.
The Piezoelectric Ceramic module of the direct-current solid-state relay of the utility model is made up of with its drive circuit 5 piezoelectric ceramic transformer 6 that boosts; Piezoelectric ceramic transformer 6 is made the isolation and the pushing member of direct current relay; Its drive circuit 5 adopts operational amplifier U1 bridge-type sine wave oscillation circuit, and it act as excitation piezoelectric ceramic transformer 6 steady operations.
Piezoelectric ceramic transformer 6 is dull and stereotyped (Rosen) structure of elongated rectangular shape, and its volume is 10 (length) * 3 (wide) * 1 (thick) mm
3, material therefor is the magnesium niobium lead zirconate titanate [Pb (Mg of doping vario-property
1/3Nb
2/3)
xZ
RgTi
1-x-yO
3] ternary system piezoelectric ceramic, material major parameter: planar electromechanical coupling factor Kp=60%, piezoelectric constant d33=320C/N, mechanical quality factor Qm＞1500, DIELECTRIC CONSTANTS
r 33/ ε
0＞1250, dielectric loss tg δ＜1%.
This piezoelectric ceramic transformer drove and generating two parts in 6 minutes, and drive part 61 is located at the elongated rectangular shape flat board along in the intermediate range of long side direction, and the dull and stereotyped volume of its shared elongated rectangular shape is 5 (length) * 3 (wide) * 1 (thick) mm
3, prepare silver electrode in the dull and stereotyped upper and lower surface drive part 61 corresponding zones of elongated rectangular shape, the elasticity of burn-oning copper cash is also drawn the input 1,2 as piezoelectric ceramic transformer 6, area is 5 * 3mm
2, the power generation part 62 of piezoelectric ceramic transformer 6 is symmetrically distributed in drive part 61 both sides, and the dull and stereotyped volume of its shared elongated rectangular shape is respectively 2.5 (length) * 3 (wide) * 1 (thick) mm
3, two end faces that are positioned at rectangular flat board at power generation part 62 prepare silver electrode, and the elasticity of burn-oning copper cash is also drawn the output 3,4 as piezoelectric ceramic transformer 6, and its both ends of the surface area is respectively 3 * 1mm
2
The piezoelectric ceramic transformer 6 of the utility model adopts along piezoelectric ceramic transformer 6 length directions (being the dull and stereotyped length direction of described elongated rectangular shape) vibration resonance pattern; Its drive part 61 is along (b direction) polarization along its length of thickness direction (a direction) polarization, power generation part 62; When load resistance is 2M Ω, resonance frequency fr ≈ 168KHz, ratio Vout/Vin＞20 of output voltage V out and input voltage vin; Temperature from-30 ℃ rise to+30 ℃ the time; Resonance frequency changes less than 0.2KHz, and the insulation resistance between input and the output is greater than 10G Ω, and piezoelectric ceramic transformer 6 has the high isolation performance.
Adopt the piezoelectric ceramic transformer 6 of this structure not only to strengthen the input and output isolation resistance, and improved piezoelectric ceramic transformer 6 output voltages greatly, help promoting the metal-oxide-semiconductor field effect transistor Q1 steady operation in the direct current relay.
As shown in Figure 2; The utility model adopts the drive circuit 5 of operational amplifier U1 bridge-type sine wave oscillation circuit (hereinafter to be referred as oscillating circuit) as piezoelectric ceramic transformer 6; Input 1,2 parts with piezoelectric ceramic transformer 6 as the oscillating circuit frequency-selective network; To guarantee oscillating circuit when the piezoelectric ceramic transformer 6 resonance frequency starting of oscillations, the frequency of its output voltage and piezoelectric ceramic transformer 6 resonance frequencys are synchronous.
Because piezoelectric ceramic transformer 6 is capacitive character near resonance frequency; Therefore; The part of the drive part 61 of piezoelectric ceramic transformer 6 as operational amplifier U1 capacitance-resistance connection in series-parallel frequency-selective network; Make oscillating circuit in the resonance frequency starting of oscillation of piezoelectric ceramic transformer 6, and make the output voltage frequency of oscillating circuit have the effect that piezoelectric ceramic transformer 6 resonance frequencys change of following the tracks of.Therefore; When piezoelectric ceramic transformer 6 resonance frequencys change because of load or variation of ambient temperature; In the push module course of work; The electric voltage frequency of excitation piezoelectric ceramic transformer 6 work of drive circuit 61 outputs of piezoelectric ceramic transformer 6 always can change with piezoelectric ceramic transformer 6 resonance frequencys synchronously, thereby has guaranteed the stable of piezoelectric ceramic transformer 6 power outputs.
Operational amplifier U1; Series connection, the 5th resistance R 5 and 2 parallel connections of the 2nd capacitor C and degenerative the 3rd resistance R the 3, the 4th resistance R 4 of the 7th resistance R 7 of positive feedback frequency-selective network and the input 1,2 of piezoelectric ceramic transformer 6; This four part respectively is that an arm constitutes oscillating circuit; The frequency of oscillation of this oscillating circuit is decided by frequency-selective network; Suitably the 7th resistance R the 7, the 5th resistance R 5 in the adjustment frequency-selective network and the parameter value of the 2nd capacitor C 2 make the oscillating circuit can only be in piezoelectric ceramic transformer 6 resonance frequency starting of oscillations.This oscillating circuit has stronger frequency-tracking ability, has guaranteed the stable of piezoelectric ceramic transformer 6 output voltages.The two ends of the 1st resistance R 1 are connected to input power supply and operational amplifier U1 output respectively; The 2nd resistance R 2 and the 6th resistance R 6 are formed bleeder circuit; Through the 5th resistance R 5 voltage be added to operational amplifier U1 in-phase input end+; The 1st capacitor C 1 and the 3rd capacitor C 3 are as filter circuit, to reduce the interference of high frequency clutter to the drive circuit 5 of piezoelectric ceramic transformer 6.
Like Fig. 3, shown in 4; The direct-current solid-state relay of the utility model; Form by the described Piezoelectric Ceramic module of direct-current solid-state relay, the input circuit 7 of MOS field-effect transistor Q1 and the output circuit 8 of MOS field-effect transistor Q1 of being used for; To be input to MOS field-effect transistor Q1 input circuit 7 by the standard sine wave voltage signal of Piezoelectric Ceramic module output 3,4 outputs; And the input circuit 7 of MOS field-effect transistor Q1 obtains the sine wave of described sine voltage input signal after rectification, filtering and voltage stabilizing d. c. voltage signal is input to the input of MOS field-effect transistor Q1; And combine with the output circuit of MOS field-effect transistor Q1 8; Promote the complete conducting of MOS field-effect transistor Q1, thereby make the Piezoelectric Ceramic module of direct-current solid-state relay realize the task that driven MOS field-effect transistor Q1 works, make the direct-current solid-state relay operate as normal.
As shown in Figure 4; The sine voltage signal of piezoelectric ceramic transformer 6 outputs 3,4 outputs in the described Piezoelectric Ceramic module; The VD signal that obtains after the voltage stabilizing of the rectification of the bridge rectifier that two double diode D1 in MOS field-effect transistor Q1 input circuit, D2 form, the 8th resistance R the 8, the 4th capacitor C 4, voltage-stabiliser tube D3; Be input to grid-source electrode of MOS field-effect transistor Q1 through kenotron D4, PNP transistor Q2 and the 9th resistance R 9, and pass through the load power source Vout and the load resistance R of the output loop 8 of composition MOS field-effect transistor Q1
L, be linked into the drain electrode of field effect Q1, excite MOS field-effect transistor Q1 conducting.The load current size is decided by DC power supply voltage and load resistance R
L
Wherein the model specification of voltage-stabiliser tube D3 and MOS field-effect transistor Q1 can be confirmed according to the size of the required load voltage of direct-current solid-state relay, load current, thereby can produce the piezoelectric ceramic direct-current solid-state relay of plurality of specifications, different loads voltage and load current.
The direct-current solid-state relay of the utility model; Its input voltage is that 3-30VDC, load voltage are that 0-55VDC, load current are 5A, and operational amplifier U1 adopts TS391-A, and D1 and D2 adopt the double diode of BAV99; Voltage-stabiliser tube D3 adopts the 12V voltage-stabiliser tube; Kenotron D4 adopts 1N4148, and PNP triode transistor Q2 adopts 4403, and MOS field-effect transistor Q1 adopts IRF6930.
Claims (7)
1. Piezoelectric Ceramic module; Comprise isolated component and drive circuit (5); It is characterized in that: said isolated component is the piezoelectric ceramic transformer (6) of elongated rectangular shape writing board shape; On described piezoelectric ceramic transformer (6), be respectively equipped with drive part (61) that links to each other with its input (1,2) and the power generation part (62) that links to each other with its output (3,4), described drive circuit (5) links to each other with the input (1,2) of described piezoelectric ceramic transformer (6).
2. Piezoelectric Ceramic module according to claim 1; It is characterized in that: described drive part (61) is located at described elongated rectangular shape flat board along in the intermediate range of long side direction; Its shared volume is the half the of the dull and stereotyped volume of elongated rectangular shape; Prepare silver electrode in the dull and stereotyped corresponding zone of upper and lower surface drive part (61) of elongated rectangular shape and the elasticity copper cash of burn-oning is respectively drawn; As two inputs (1,2) of described piezoelectric ceramic transformer (6), described power generation part (62) is symmetrically distributed in drive part (61) both sides, and the shared volume of its every side is 1/4 of the dull and stereotyped volume of elongated rectangular shape; Be positioned at power generation part (62) that two dull and stereotyped end faces of elongated rectangular shape prepare silver electrode and the elasticity copper cash of burn-oning is respectively drawn, as two outputs (3,4) of piezoelectric ceramic transformer (6).
3. Piezoelectric Ceramic module according to claim 1 is characterized in that: said drive circuit (5) is made up of input circuit, bridge-type sine wave oscillation circuit, wherein;
The 1st electric capacity (C1) in the input circuit is connected between input power supply and the earth terminal; One of the 2nd resistance (R2) is terminated at the input power supply; Its other end is through the parallelly connected ground connection of the 6th resistance (R6) with the 3rd electric capacity (C3), and the 1st resistance (R1) inserts between the output of input power supply and operational amplifier (U1);
The bridge-type sine wave oscillation circuit mainly is made up of the bridge circuit that operational amplifier (U1), coupled 4 support arms that connect constitute; One of the 1st support arm is terminated at the output of operational amplifier (U1), and the other end is through the in-phase input end (+) that be connected in series in operational amplifier (U1) of the 7th resistance (R7) with the input (1,2) of piezoelectric ceramic transformer; One of the 2nd support arm is terminated at the in-phase input end (+) of operational amplifier (U1); The other end is through an end that is connected in the 6th resistance (R6), the 3rd electric capacity (C3) parallel connection of the 5th resistance (R5), the 2nd electric capacity (C2), and the parallelly connected ground connection of passing through the 6th resistance (R6), the 3rd electric capacity (C3); One of the 3rd support arm is terminated at the inverting input (-) of operational amplifier (U1), and the other end is connected to the output of operational amplifier (U1) through the 3rd resistance (R3); One of the 4th support arm is terminated at the inverting input (-) of operational amplifier (U1), and the other end is through the 4th resistance (R4), the 6th resistance (R6) the parallelly connected ground connection with the 3rd electric capacity (C3).
4. according to right 3 described Piezoelectric Ceramic modules, it is characterized in that: the model of described operational amplifier (U1) is TS391-A.
5. direct-current solid-state relay; Comprise piezoelectric ceramic transformer driver module, MOS field-effect transistor (Q1) and input thereof, output circuit (7,8); It is characterized in that: described piezoelectric ceramic transformer driver module comprises isolated component and drive circuit (5); Said isolated component is the piezoelectric ceramic transformer (6) of elongated rectangular shape writing board shape; On described piezoelectric ceramic transformer (6), be respectively equipped with drive part (61) that links to each other with its input (1,2) and the power generation part (62) that links to each other with its output (3,4); Described drive circuit (5) links to each other with the input (1,2) of described piezoelectric ceramic transformer (6), and the output of said piezoelectric ceramic transformer (6) (3,4) links to each other with two inputs of the bridge rectifier be made up of two double diodes (D1, D2) in the input circuit (7) of described MOS field-effect transistor (Q1) respectively.
6. direct-current solid-state relay according to claim 5; It is characterized in that: the input circuit (7) of described MOS field-effect transistor (Q1) is by two double diodes (D1, D2), the 8th resistance (R8), the 4th electric capacity (C4), voltage-stabiliser tube (D3), and rectification, filtering and voltage stabilizing circuit that kenotron (D4), PNP transistor (Q2), the 9th resistance (R9) constitute are formed.
7. direct-current solid-state relay according to claim 6; It is characterized in that: described double diode (D1, D2) model is BAV99; Kenotron (D4) model is 1N4148, and PNP transistor (Q2) model is 4403, and MOS field-effect transistor (Q1) model is IRF6930.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120234146U CN202143000U (en) | 2011-07-05 | 2011-07-05 | Piezoelectric ceramic driver module and direct current solid-state relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120234146U CN202143000U (en) | 2011-07-05 | 2011-07-05 | Piezoelectric ceramic driver module and direct current solid-state relay |
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| Publication Number | Publication Date |
|---|---|
| CN202143000U true CN202143000U (en) | 2012-02-08 |
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| CN201120234146U Expired - Fee Related CN202143000U (en) | 2011-07-05 | 2011-07-05 | Piezoelectric ceramic driver module and direct current solid-state relay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467818A (en) * | 2014-12-09 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Piezoelectric ceramic drive signal source circuit |
| CN106817025A (en) * | 2015-11-27 | 2017-06-09 | 中国科学院沈阳自动化研究所 | It is a kind of to be electrically coupled disconnecting relay suitable for what is used under oil-filled hyperbaric environment |
-
2011
- 2011-07-05 CN CN201120234146U patent/CN202143000U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467818A (en) * | 2014-12-09 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Piezoelectric ceramic drive signal source circuit |
| CN104467818B (en) * | 2014-12-09 | 2017-09-29 | 中国科学院苏州生物医学工程技术研究所 | A kind of piezoelectric ceramic drive signal source circuit |
| CN106817025A (en) * | 2015-11-27 | 2017-06-09 | 中国科学院沈阳自动化研究所 | It is a kind of to be electrically coupled disconnecting relay suitable for what is used under oil-filled hyperbaric environment |
| CN106817025B (en) * | 2015-11-27 | 2018-11-20 | 中国科学院沈阳自动化研究所 | It is a kind of to be electrically coupled disconnecting relay suitable for what is used under oil-filled hyperbaric environment |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20180705 |