WO2008026764A1 - Capteur piézoélectrique et dispositif de détection - Google Patents
Capteur piézoélectrique et dispositif de détection Download PDFInfo
- Publication number
- WO2008026764A1 WO2008026764A1 PCT/JP2007/067243 JP2007067243W WO2008026764A1 WO 2008026764 A1 WO2008026764 A1 WO 2008026764A1 JP 2007067243 W JP2007067243 W JP 2007067243W WO 2008026764 A1 WO2008026764 A1 WO 2008026764A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- wiring board
- piezoelectric
- piezoelectric vibrator
- pressing member
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/022—Fluid sensors based on microsensors, e.g. quartz crystal-microbalance [QCM], surface acoustic wave [SAW] devices, tuning forks, cantilevers, flexural plate wave [FPW] devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/222—Constructional or flow details for analysing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/025—Change of phase or condition
- G01N2291/0256—Adsorption, desorption, surface mass change, e.g. on biosensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0426—Bulk waves, e.g. quartz crystal microbalance, torsional waves
Definitions
- the present invention includes a piezoelectric vibrator configured such that an excitation electrode provided on one surface side of a piezoelectric piece comes into contact with a measurement atmosphere and an excitation electrode provided on the other surface side faces an airtight space.
- the present invention relates to a piezoelectric sensor that senses an object to be measured by detecting a change in the natural frequency of a child and a sensing device that uses this piezoelectric sensor.
- Detect the presence of trace substances in the sample solution for example, environmental pollutants such as dioxin, disease markers such as hepatitis C virus and C-reactive protein (CRP), and measure the concentration of these substances.
- environmental pollutants such as dioxin
- disease markers such as hepatitis C virus and C-reactive protein (CRP)
- CRP C-reactive protein
- a piezoelectric sensor such as a crystal sensor including a crystal oscillator and a measuring instrument including an oscillation circuit that is electrically connected to the crystal sensor to oscillate the crystal oscillator are used. Measurement methods are widely known.
- the measurement method includes, for example, a crystal piece that is a plate-like piezoelectric piece and a pair of foil-like excitations provided so that the crystal piece is sandwiched between one side and the other side of the crystal piece.
- a quartz crystal sensor including a crystal resonator called a Langevin type with an electrode for excitation (excitation electrode)
- the electrode on one side is in contact with the measurement atmosphere (sample liquid) and the electrode on the other side is in an airtight space
- the measurement target substance in the sample liquid comes into contact with the electrode on one side, the natural frequency of the quartz piece changes according to the mass of the contacted substance. .
- an electrode on one side of the quartz crystal resonator is provided with an adsorption layer in which, for example, an antibody is attached to the surface.
- This antibody is designed to selectively adsorb, for example, one to three of the measurement target as described above by the antigen-antibody reaction, and the measurement target is adsorbed on the adsorption layer.
- the frequency of the crystal piece changes according to the amount of adsorption of the object to be measured.
- the surface of the crystal unit is measured without providing the adsorption layer on the surface of the crystal unit in order to analyze how the antibody adheres to the measurement target.
- the antibody is physically attached to the crystal resonator by contacting the electrode.
- FIG. 15 shows an example of the configuration around the crystal unit provided in the crystal sensor.
- reference numeral 1 1 denotes a wiring board
- a crystal resonator 1 2 is placed on the wiring board 1 1.
- the excitation electrodes provided on the front and back surfaces of the crystal unit 12 are electrically connected to the electrodes provided on the wiring board 11 side, so that the crystal unit 12 is Wiring board 1 1 is electrically connected.
- reference numeral 13 denotes a through hole formed in the wiring board 11 in the thickness direction
- reference numeral 14 in the figure denotes a sealing member that closes the through hole 13 from the back side of the board 11.
- a region surrounded by the sealing member 14, the through-hole 11, and the crystal resonator 12 constitutes an airtight space, and the excitation electrode on the back side of the crystal resonator 12 is in this airtight space. Facing.
- reference numeral 15 denotes a plate-shaped crystal pressing member made of, for example, rubber, and the crystal resonator 12 is pressed against the substrate 11 to fix its position.
- 16 is an opening provided so as to penetrate the crystal pressing member 15 in the thickness direction, and faces the excitation electrode on the surface side of the crystal resonator 12.
- reference numeral 17 denotes an annular protrusion of the crystal pressing member 15, which will be described later.
- a predetermined amount of sample liquid is stored in a liquid storage space 18 surrounded by the opening 16 and the annular protrusion 17 so that the excitation electrode is in contact with the measurement atmosphere.
- the oscillation of the crystal unit 12 is hindered.
- the oscillation of the child 12 is stable, and high-precision measurement can be performed. Therefore, it has been studied to suppress the stress by reducing the area of the quartz pressing member 15 that contacts the quartz crystal resonator 12 and presses it.
- the annular protrusion 1 so as to surround the periphery of the opening 16 on the back surface of the pressing member 15. 7 is formed, and the crystal resonator 12 is pressed against the wiring board 11 by the tip of the protrusion 17 to fix the position.
- Patent Document 1 and Patent Document 2 also describe a quartz sensor using a Langevin type crystal resonator, this does not solve the above-mentioned problems.
- Patent Document 2 JP 2 0 0 6-0 2 9 8 7 3 (Paragraph 0 0 2 0, Paragraph 0 0 2 1 and FIG. 1) Patent Document 2
- the present invention has been made based on the above situation, and the problem is that the piezoelectric vibrator includes a piezoelectric vibrator, and the object to be measured comes into contact with the excitation electrode on one side of the piezoelectric vibrator.
- the present invention provides a technique for performing highly accurate measurement in a piezoelectric sensor that detects a measurement object in a sample liquid based on a change in the natural frequency and a sensor using the piezoelectric sensor.
- the piezoelectric sensor of the present invention is a piezoelectric sensor that is electrically connected to a measuring instrument body in order to detect an object to be measured in a sample liquid.
- connection terminal portion connected to the measuring instrument main body, and a wiring board provided on one side thereof with an electrode electrically connected to the connection terminal portion and a recess for forming an airtight space;
- the plate-like piezoelectric piece is provided on one side and the other side of the piezoelectric piece, and includes an excitation electrode electrically connected to the electrode, and the depression on the other side is closed so that the excitation electrode faces the recess.
- a piezoelectric vibrator provided on the wiring board in a state, a liquid containing space having a bottom surface on one side of the piezoelectric vibrator, and a pressing member made of an elastic material provided to surround the liquid containing space;
- a cover for liquid injection which covers the pressing member facing the wiring board, communicates with the liquid storage space on the surface thereof, and is provided with an injection port for injecting a sample liquid into the liquid storage space;
- the pressing member includes an annular protrusion for fixing the position of the piezoelectric vibrator by pressing an outer portion of the concave portion on one surface side of the piezoelectric vibrator to the wiring board side,
- the annular protrusion is configured such that the diameter decreases as the inner peripheral surface and the outer peripheral surface both move downward, and decreases as the distance between both peripheral surfaces decreases, and the tip has an acute angle.
- the characteristic frequency of the piezoelectric vibrator changes when the object to be measured in the sample liquid contained in the housing space contacts one surface of the piezoelectric vibrator.
- a claw portion bent inward is provided at an edge portion of the liquid injection cover, a notch portion is provided in the wiring board, and the claw portion has a restoring force toward the inner side in the notch portion.
- the liquid injection cover may be attached to the wiring board in a state where the pressing member is pressed against the wiring board by being locked to the peripheral edge of the wiring board.
- Another aspect of the invention is a piezoelectric sensor that is electrically connected to a measuring instrument body to detect an object to be measured in a sample liquid.
- connection terminal portion connected to the measuring instrument main body is provided, and an electrode and an airtight space electrically connected to the connection terminal portion are formed on one side thereof.
- the plate-like piezoelectric piece is provided on one side and the other side of the piezoelectric piece, and includes an excitation electrode electrically connected to the electrode, and the depression on the other side is closed so that the excitation electrode faces the recess.
- a piezoelectric vibrator provided on the wiring board in a state, a liquid containing space having a bottom surface on one side of the piezoelectric vibrator, and a pressing member made of an elastic material provided so as to surround the liquid containing space;
- the pressing member includes an annular protrusion for fixing the position of the piezoelectric vibrator by pressing an outer portion of the concave portion on one surface side of the piezoelectric vibrator to the wiring board side,
- the annular protrusion is configured such that the diameter decreases as both the inner peripheral surface and the outer peripheral surface go downward, and the distance between both peripheral surfaces goes downward, and the tip forms an acute angle.
- the natural frequency of the piezoelectric vibrator changes when a liquid flow is formed in the liquid storage space by supplying and discharging the sample liquid, and the object to be measured in the sample liquid is brought into contact with one surface of the piezoelectric vibrator. It is characterized by.
- a lower portion of the liquid supply / discharge cover is provided with a protrusion that enters the liquid storage space and regulates the vertical liquid flow in the liquid storage space.
- the board and the pressing member are provided with holes that overlap each other, and the support is provided with a protrusion for positioning the wiring board and the pressing member on the support corresponding to each hole. Good.
- the injection path includes, for example, a liquid supply pipe that is detachable with respect to the liquid supply / discharge cover
- the discharge path includes a liquid discharge pipe that is detachable with respect to the liquid supply / discharge cover.
- the pipe and the liquid discharge pipe are configured to be attached to the liquid supply / discharge cover via a connector that is detachable from the liquid supply / discharge cover.
- an annular protrusion arranges a piezoelectric vibrator.
- the excitation electrode of the piezoelectric vibrator and the electrode of the wiring substrate are electrically connected.
- the sensing device of the present invention includes the above-described piezoelectric sensor, detects a change in the natural frequency of the piezoelectric vibrator, and detects a measurement object in the sample liquid based on the detection result. It is equipped with.
- the piezoelectric sensor of the present invention forms a liquid storage space having a bottom surface on one surface side of a piezoelectric vibrator provided so as to close the concave portion of the wiring board, and is provided so as to surround the liquid storage space.
- a pressing member made of an elastic material having an annular protrusion for pressing the outer portion of the concave portion on one surface side of the vibrator against the wiring board side to fix the position of the piezoelectric vibrator; Both the peripheral surface and the outer peripheral surface are configured such that the diameter decreases as it goes downward, and the distance between both peripheral surfaces decreases as it goes downward.
- the area of the pressing member that contacts the piezoelectric vibrator is suppressed, the pressure applied to the piezoelectric vibrator is suppressed, and accordingly, the oscillation of the piezoelectric vibrator can be prevented from being disturbed.
- the side surface of the liquid storage space forms an obtuse angle with respect to the bottom surface, and at the corners formed by these surfaces, Since the upper side is open as viewed from the air bubbles, the air bubbles can float up and go out of the liquid storage space, and can be prevented from staying in the space. Therefore, the air bubbles are stored in the liquid storage space. It is possible to prevent the amount of sample solution to be reduced by the volume of the bubbles. As a result, highly accurate measurement can be performed.
- FIG. 1 is a perspective view of a crystal sensor according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the crystal sensor.
- FIG. 3 is a longitudinal front view of the crystal sensor.
- FIG. 4 is a longitudinal side view of the crystal sensor.
- FIG. 5 is a perspective view of the back surface side of the crystal pressing member constituting the crystal sensor.
- FIG. 6 is an explanatory diagram showing the state of bubbles in the sample liquid contained in the crystal sensor.
- FIG. 7 is a block diagram of a sensing device including the crystal sensor.
- FIG. 8 is a perspective view of the sensing device.
- FIG. 9 is a perspective view of a crystal sensor according to another embodiment of the present invention.
- FIG. 10 is an exploded perspective view of the crystal sensor.
- FIG. 11 is a vertical side view of the crystal sensor.
- FIG. 12 is a perspective view showing the internal structure of the liquid supply / discharge cover constituting the crystal sensor.
- FIG. 13 is an explanatory diagram showing the state of bubbles in the sample liquid contained in the crystal sensor.
- FIG. 14 is an explanatory view showing another configuration of the liquid supply / discharge cover.
- FIG. 15 is an explanatory diagram showing the state of bubbles in the sample liquid contained in the conventional quartz sensor.
- FIG. 1 is a perspective view showing a quartz sensor 20 as an example of a piezoelectric sensor according to the present invention.
- FIG. 2 is an exploded perspective view showing the upper surface side of each component of the quartz sensor 20.
- the quartz sensor 20 is composed of a sealing member 3A, a wiring board 3, and a quartz crystal that is a piezoelectric vibrator.
- Each component of the vibrator 2, the crystal pressing member 4, and the liquid injecting cover 5 is superposed from the bottom in this order.
- 3 and 4 are a longitudinal front view and a longitudinal side view of the quartz sensor 20, respectively.
- the crystal resonator 2 is composed of a crystal piece 2 1 which is a piezoelectric piece, excitation electrodes 2 2 and 2 3, and lead electrodes 2 4 and 2 5.
- the crystal piece 2 1 has an equivalent thickness of 1 ⁇ ! It is ⁇ 300 m, preferably 1 85 m, and is formed in a plate shape in which a part of the circumferential line is notched linearly.
- One excitation electrode 22 and the other excitation electrode 23 are attached to each other to form a circular shape having a smaller diameter than the crystal piece 21.
- one end side of one of the foil-like lead electrodes 24 is connected to the one excitation electrode 22, and this lead electrode 24 is connected to the end face of the crystal piece 21. And bent to the other side of the crystal piece 21.
- one end side of the other lead electrode 25 in the form of a foil is connected to the other excitation electrode 22 with the same layout as the one lead electrode 24.
- the layout of the excitation electrode 2 2 (2 3) and the output electrode 2 4 (2 5) is the same on both sides of the crystal piece 21.
- the equivalent thicknesses of the excitation electrodes 2 2 and 2 3 and the lead-out electrodes 2 4 and 25 are, for example, 0.2111, and gold is used as an electrode material, for example.
- FIG. 3 illustration of each electrode of the crystal unit 2 is omitted for convenience.
- an antibody is attached to the surface of the excitation electrode 22 (not shown).
- An adsorption layer is provided. This antibody is selectively adsorbed by an antigen-antibody reaction with a measurement object, such as dioxin. The frequency of fragment 2 1 changes.
- the wiring board 3 is formed of, for example, a printed board, and an electrode 31 and an electrode 32 are provided at an interval from the front end side to the rear end side of the surface. Between the electrodes 3 1 and 3 2, a through hole 3 3 is formed which is perforated in the thickness direction of the wiring board 3 with a space from the electrodes 3 1 and 3 2. As will be described later, the through-hole 33 forms a recess that forms an airtight space where the excitation electrode 23 on the back side of the crystal unit 2 faces, and its aperture is large enough to accommodate the excitation electrode 23. Is formed.
- connection terminal portions 34 and 35 are formed as connection terminal portions 34 and 35, respectively, closer to the rear end side than the portion where the electrode 32 is formed.
- One connection terminal 3 4 is electrically connected to electrode 3 1 via pattern 3 4a, and the other connection terminal 3 5 is electrically connected to electrode 3 2 via pattern 3 5a.
- connection terminal 3 4 is electrically connected to electrode 3 1 via pattern 3 4a
- connection terminal 3 5 is electrically connected to electrode 3 2 via pattern 3 5a.
- Has been. 3 and 4 are shown. For convenience, each electrode and pattern of the substrate 3 are omitted.
- 36 is a weir formed by photolithography using a resist, for example, and is formed along the outer shape of the crystal unit 2. Otherwise, the weir 36 may be formed by silk printing, for example.
- the weir 36 has a role to align the crystal resonator 2, and the crystal resonator 2 is placed in a region surrounded by the weir 36.
- 3 7 a, 3 7 b, and 3 7 c are engaging holes, and are drilled in the thickness direction of the wiring board 3. These engagement holes 3 7 a, 3 7 b, 3 7 c are engaged with engagement protrusions 51 a, 51 b, 51 c provided on the lower surface of the cover 5, respectively.
- 3 8 a, 3 8 b, and 3 8 c are notches formed on the periphery of the wiring board 3.
- claw portions 5 2 a, 5 2 b, 5 2 c bent inward are provided on the peripheral edge of the lower surface of the cover 5, and notches 3 8 a, 3 8 b,
- the 3 8 c engages with the claw portions 5 2 a, 5 2 b, and 5 2 c, respectively.
- the sealing member 3 A is a film-like member and constitutes a recess that forms an airtight space together with the through-hole 33.
- the crystal pressing member 4 is made of, for example, silicon rubber, and has a shape corresponding to the wiring board 3. More specifically, the crystal pressing member 4 has rectangular cutout portions 4 1 a, 4 1 b and 4 1 c corresponding to the cutout portions 3 8 a, 3 8 b and 3 8 c, respectively. It is formed in the plate shape provided. The notches 4 1 b and 4 1 c are formed at adjacent corners of the crystal pressing member 4. Further, when the side where these notches 4 1 b and 4 1 c are formed is the rear side, the notch 4 1 a is formed at the center of one edge of the front side of the crystal holding member 4.
- FIG. 5 is a perspective view showing the lower surface side of the crystal pressing member 4, and the configuration of the pressing member 4 will be described with reference to this figure.
- a recess 42 that accommodates the crystal unit 2 is formed on the lower surface of the pressing member 4.
- the annular protrusion 4 3 has a role of pressing the crystal unit 2 against a region surrounding the through hole 3 3 and fixing the position of the crystal unit 2. As shown in Fig. 2, Fig. 3 and Fig. 4, the crystal holding member 4 is not open on the surface side. An opening 44 is formed, and the opening 44 communicates with a space surrounded by the annular protrusion 43.
- the peripheral surface 4 4 a of the opening 4 4 and the inner peripheral surface 4 3 a of the annular protrusion 4 3 are inclined inward and downward. That is, the diameters of the opening 44 and the annular protrusion 43 are getting smaller as they go downward.
- a region surrounded by the peripheral surfaces 4 3 a and 4 4 a and the crystal resonator 2 constitutes a liquid storage space 45 for storing the sample liquid.
- the outer peripheral surface 4 3 b of the annular protrusion 43 is also formed so as to be inclined inward and downward.
- the width of the annular protrusion 4 3 (distance between the peripheral surfaces 4 3 a and 4 3 b) becomes smaller as it goes downward, and its tip forms an acute angle.
- the tip of the ring-shaped protrusion has an acute angle.
- the contact portion between the crystal unit and the ring-shaped protrusion (the size of width 1 shown in Fig. 3) is 0.2 ⁇ m-O. 4 m. Say.
- reference numerals 4 6 a and 4 6 denote engagement holes that are formed so as to penetrate the pressing member 4 in the thickness direction, and the engagement holes 3 7 a and 3 7 b of the wiring board 3 and liquid injection It is formed so as to correspond to the engaging protrusions 5 1 a and 5 1 b of the entrance cover 5.
- 4 6 c is an arc-shaped notch formed at the center of one edge on the rear side, and is formed on the engagement hole 3 7 c of the wiring board 3 and the engagement protrusion 5 1 c of the liquid injection cover 5. Yes.
- the cover 5 is made of, for example, polycarbonate, and a sample solution inlet 53 and a confirmation port 54 are formed on the front side and the rear side of the upper surface, respectively.
- the lower surface of the cover 5 is formed with an injection path 55 which is a groove along the length direction of the cover 5, and one end and the other end of the injection path 5 5 are the inlet 5 3, connected to confirmation port 5 4 respectively.
- the injection path 55 is provided so as to face the opening 44, and the sample liquid injected into the inlet 53 is introduced into the liquid storage space 45 via the injection path 55. It comes to be supplied.
- the crystal sensor 20 is assembled as follows. First, the through-hole 33 of the wiring board 3 is closed with the sealing member 3 A, and a flange portion is formed on the board 3. Subsequently, the lead electrodes 24, 25 on the crystal resonator 2 side overlap with the electrodes 31, 32 on the wiring board 3 side, and the excitation electrode 23 on the back surface side of the crystal resonator 2 overlaps the recess. Thus, the quartz crystal M mover 2 is placed on the wiring board 3.
- the engagement protrusions 5 1 a to 5 1 c of the liquid injection cover 5 are engaged with the engagement holes 4 6 a, 4 6 b and the notch portion 4 6 c of the crystal pressing member 4, and the liquid injection cover 5 and the holding member 4 are overlapped, and then the claw portions 5 2 a, 5 2 b, 5 2 c of the liquid injection cover 5 and the notches 3 8 a, 3 8 b, 3 8 of the wiring board 3 Cover c to fit it and press it toward the wiring board 3.
- the claw portions 5 2 a to 5 2 c of the liquid injection cover 5 bend to the outside of the wiring board 3, and the claw portions 5 2 a to 5 2 c are notched portions 3 8 a to 3 8.
- the claw part 5 2 a to 5 2 c force is restored to the inner side at the same time as it wraps around the lower surface of the peripheral edge of the wiring board 3 through c.
- the pressing member 4 sandwiched between the wiring board 3 and the cover 5 is pressed between the parts 52a to 52c and locked together.
- the annular protrusion 4 3 presses the outer portion of the recess on the surface of the crystal unit 2 against the wiring board 3 side, thereby fixing the position of the crystal unit 2.
- the peripheral edge is tightly bonded to the wiring board 3, and the concave portion formed by the through hole 33 and the sealing member 3A becomes an airtight space, and the excitation electrode 23 on the back side of the crystal resonator 2 is Facing the airtight space, the crystal oscillator 2 side extraction electrodes 2 4 and 2 5 are in close contact with the wiring board 3 side electrodes 3 1 and 3 2, and the crystal oscillator 2 and the wiring board 3 are electrically connected. Is done.
- the injection port 5 3 and the confirmation port 5 4 are covered with a protective film sheet.
- the sample solution 101 is injected into the inlet 53 of the liquid injection cover 5 by an injector.
- the sample liquid 10 01 injected into the inlet 53 is supplied to the liquid storage space 45 of the sample liquid constituted by the opening 4 4 and the annular protrusion 4 3, and is supplied to the surface side of the crystal unit 2.
- the excitation electrode 2 2 is in contact with the sample solution 10 1.
- the quartz sensor 20 described above contains liquid with the inner peripheral surface 44 a having a bottom surface on one surface side of the crystal resonator 2 provided so as to close the concave portion of the wiring board 3 together with the opening 44 toward the inner side.
- a space 4 5 is formed, and the position of the crystal unit 2 is fixed by pressing the outer part of the concave portion on one side of the crystal unit 2 against the wiring board 3 side so as to surround the liquid storage space 45
- the area of the crystal holding member 3 that contacts the crystal unit 2 can be suppressed, the pressure applied to the crystal unit 2 can be suppressed, and thus oscillation of the crystal unit 2 can be prevented.
- the peripheral surfaces 4 3 a and 4 4 a of the liquid storage space 45 are not affected even if bubbles enter the liquid storage space 45 when supplying the sample liquid to the liquid storage space 45.
- the crystal resonator 2 has an obtuse angle with respect to the surface, and since the upper side as viewed from the bubbles is open at the corners formed by these surfaces, the bubbles rise and contain the liquid.
- the position of the crystal unit 2 is fixed by the annular protrusion 4 3, so that the electrodes 3 1, 3 2 on the wiring board 3 side and the crystal Vibrator W
- the two electrodes 2 4 and 2 5 are in close contact with each other and are electrically connected, for example, there is no need to use a conductive adhesive to make this electrical connection, thus simplifying the manufacturing process. Can be achieved.
- the above-described crystal sensor 20 is used as a detection unit of a sensing device by being connected to a measuring device body 7 having a configuration as shown in FIG. 7 which is a block diagram, for example.
- 62 is an oscillation circuit for oscillating the crystal piece 21 of the crystal sensor 20
- 63 is a reference clock generator for generating a reference frequency signal
- 64 is a frequency difference detection means comprising, for example, a heterodyne detector.
- 6 5 is an amplifying unit
- 6 6 is a counter for counting the frequency of the output signal from the amplifying unit 65
- 6 7 is a data processing unit.
- the frequency difference detecting means 6 4 uses the frequency from the quartz sensor side and the reference ring.
- FIG. 8 is a diagram showing an example of the measuring instrument main body 6 described above.
- the measuring instrument main body 6 includes a main body portion 68 and an openable / closable lid portion 69 formed on the front surface of the main body portion 68.
- the lid 69 When the lid 69 is opened, the front surface of the main body 68 appears as shown in FIG. 8 (b).
- a plurality of insertion openings 60 of the crystal sensor are formed on the front surface of the main body 68, and for example, eight insertion openings are formed in a straight line with a constant interval.
- each crystal sensor 2 By inserting the rear end side of the wiring board 3 of each crystal sensor 2 horizontally to a certain depth into each insertion port 60 of the measuring instrument main body 6, the connection terminal part 3 4 of the board 3 When the electrodes formed in the inside of the insertion port 60 are electrically connected, the inside of the insertion port 60 holds the wiring board 3 so that the crystal sensor 20 is horizontal. It is fixed to the measuring instrument body 6 while keeping
- the quartz pressing member 4 may be constituted by an elastic body other than rubber.
- FIG. 9 is a perspective view of the crystal sensor 7
- FIG. 10 is an exploded perspective view showing the upper surface side of each member constituting the crystal sensor 7.
- FIG. 11 is a longitudinal side view of the crystal sensor 7.
- the electrodes of the crystal resonator 2 are not shown for convenience.
- reference numeral 71 denotes a support, on the surface of which is provided a recess 72 that accommodates and holds the wiring board 3.
- reference numeral 7 3 denotes an engaging protrusion provided in the recess 72.
- Each of the engaging protrusions 7 3 engages with the engaging holes 3 7 a and 3 7 b of the wiring board 3 and the engaging holes 4 7 a and 4 7 b of the crystal pressing member 4 in order to fix these positions.
- 7 4 is a hole, and its peripheral side surface is threaded.
- 8 1 is a cover for supplying and discharging liquid.
- a concave portion 8 2 is provided on the lower surface thereof, and the concave portion 8 2 is fitted into a projection 75 provided on the support 71 1 side, whereby a liquid supply / discharge cover 8 is provided.
- 1 is positioned relative to the support 7 1 and is secured by screws 8 3 corresponding to the holes 7 4.
- the liquid supply / discharge cover 81 attached to the support 71 in this way presses the crystal pressing member 4 against the wiring board 3 accommodated in the recess 8 2, so that the annular protrusion 4 3 is crystallized. Press the vibrator 2 against the wiring board 3 and fix the position.
- a protrusion 8 4 corresponding to the opening portion 4 4 of the pressing member 4 is provided on the lower surface side of the liquid supply / discharge cover 81, and the cover 81 is supported by the support body as described above. 7 In the state of being fixed to 1, this protrusion 84 enters into the opening 43.
- the protrusion 84 has a role of regulating the flow of the sample liquid in the vertical direction when supplying the sample liquid to the liquid storage space 45 as will be described later.
- the distance h from the excitation electrode 22 on the surface side of 2 is, for example, about 0.2 mm to 0.7 mm.
- the liquid supply / discharge cover 81 has a flow path of sample liquid 85a and And the flow path 85 b are formed so as to communicate with the liquid storage space 45 at an angle.
- the liquid supply / discharge cover 8 1 is provided with recesses 8 6 and 8 6, the peripheral surface of these recesses 86 is threaded, and the bottom surface has a flow path 8 5 a and a flow path 8 6.
- One end of a is open.
- 8 7 and 8 7 are cylindrical connectors, and the outer periphery thereof is threaded so as to correspond to the screw of the concave portion 86, and is detachable with respect to the liquid supply / discharge cover 81. It is configured.
- 8 8 a and 8 8 b are a sample liquid supply pipe and a sample liquid discharge pipe, respectively, which are detachably attached to each connector 8 7.
- the sample liquid supply pipe 8 8 a and the sample liquid discharge pipe 8 8b is supported diagonally by the inner wall of the connector 87, and communicates with the flow path 85a and the flow path 85b, respectively.
- the liquid supply pipe 88a and the flow path 85a constitute a supply path in the claims, and the liquid discharge pipe 88b and the flow path 85b constitute a discharge path.
- FIG. 10 for convenience of illustration, one connector 87 and the sample solution discharge pipe 8 7b are shown attached to the cover 81, but the other connector 87 and the sample solution supply pipe are shown. Can be removed from the cover 8 1 in the same way as 8 7 a.
- the quartz sensor 7 supplies the sample liquid 1001 to the liquid storage space 45 via the sample liquid supply pipe 8 8 a and the flow path 85 a, and at the same time the flow path 85 b and sample liquid discharge pipe 8 8 b
- the sample liquid 10 1 is drawn on the excitation electrode 2 2 at a rate of, for example, 50 L / min.
- the measurement substance in the sample solution is adsorbed on the excitation electrode 2 2.
- the upper part is viewed from the air bubble 10 2 at the corner formed by the annular protrusion 4 3 and the crystal unit 2.
- the bubbles 10 0 2 are restrained from staying at the corners, and are easily pushed away by the sample solution 10 5 flows into b and is removed from the liquid storage space 45.
- high-accuracy measurement can be performed in the same manner as the crystal sensor 20 described above.
- the sample liquid flows directly above the excitation electrode 22 due to the protrusions 84, so that the adsorptivity of the measurement substance to the excitation electrode 22 is increased, and a more accurate measurement can be performed.
- the projection 84 may not be provided.
- the connectors 8 7 and 8 7, the sample liquid supply pipe 8 8 a, and the sample liquid discharge pipe 8 8 b are configured to be detachable from the liquid supply / discharge cover 8 1. 8 Since it can be removed easily from 1 and can be easily cleaned, the labor and cost required for cleaning can be reduced. As a result, measurement costs can be reduced.
- the wiring board 3 and the crystal pressing member 4 are connected to the support body 7 1 through the engagement holes 4 6 a, 4 6, 3 7 a, 3 7 b and the protrusions 7 3 of the support body 7 1 provided in these. Therefore, it is possible to prevent the liquid storage space 45 of the sample liquid and the liquid flow path 8 5 a and the liquid flow path 8 5 b of the liquid supply / discharge cover 81 from being displaced. Therefore, the liquid flow in the liquid storage space 45 can be prevented from varying from measurement to measurement, and measurement errors due to variations in the liquid flow can be suppressed.
- the surface of the excitation electrode 22 on the side facing the liquid storage space 45 of the crystal resonator 2 is provided with an adsorption layer made of an antibody against the substance to be measured. It can also be applied when no such antibody is provided. For example, when performing measurements for research aimed at analyzing how the antibody adheres to the excitation electrode 2 2 of the crystal resonator 2, physically measure the excitation electrode 22 without providing an antibody. In some cases, a target is adsorbed and measured to detect a substance.
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- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07806698A EP2058642A4 (en) | 2006-08-30 | 2007-08-29 | PIEZOELECTRIC SENSOR AND PERCEPTION DEVICE |
CN2007800362871A CN101523186B (zh) | 2006-08-30 | 2007-08-29 | 压电传感器和感测装置 |
US12/310,377 US8176772B2 (en) | 2006-08-30 | 2007-08-29 | Piezoelectric sensor and sensing instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-233963 | 2006-08-30 | ||
JP2006233963A JP4299325B2 (ja) | 2006-08-30 | 2006-08-30 | 水晶センサ及び感知装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008026764A1 true WO2008026764A1 (fr) | 2008-03-06 |
Family
ID=39136039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/067243 WO2008026764A1 (fr) | 2006-08-30 | 2007-08-29 | Capteur piézoélectrique et dispositif de détection |
Country Status (5)
Country | Link |
---|---|
US (1) | US8176772B2 (ja) |
EP (2) | EP2669654A2 (ja) |
JP (1) | JP4299325B2 (ja) |
CN (1) | CN101523186B (ja) |
WO (1) | WO2008026764A1 (ja) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4299325B2 (ja) * | 2006-08-30 | 2009-07-22 | 日本電波工業株式会社 | 水晶センサ及び感知装置 |
GB0708346D0 (en) * | 2007-04-30 | 2007-06-06 | Attana Ab | Sensor |
JP5066442B2 (ja) * | 2007-12-28 | 2012-11-07 | 日本電波工業株式会社 | 圧電センサ及び感知装置 |
JP5069094B2 (ja) * | 2007-12-28 | 2012-11-07 | 日本電波工業株式会社 | 圧電センサ及び感知装置 |
JP5160583B2 (ja) * | 2009-06-16 | 2013-03-13 | 日本電波工業株式会社 | 感知装置及び感知方法 |
JP5160584B2 (ja) * | 2009-06-24 | 2013-03-13 | 日本電波工業株式会社 | 感知装置 |
JP5240794B2 (ja) | 2009-06-30 | 2013-07-17 | 日本電波工業株式会社 | 感知装置 |
JP2011189795A (ja) * | 2010-03-12 | 2011-09-29 | Pacific Ind Co Ltd | タイヤ摩耗検出装置 |
JP5051798B2 (ja) * | 2010-06-30 | 2012-10-17 | 日本電波工業株式会社 | 感知装置 |
JP5051799B2 (ja) * | 2010-06-30 | 2012-10-17 | 日本電波工業株式会社 | 感知装置 |
US9086338B2 (en) | 2010-06-25 | 2015-07-21 | Nihon Dempa Kogyo Co., Ltd. | Sensing device |
JP5102334B2 (ja) * | 2010-06-25 | 2012-12-19 | 日本電波工業株式会社 | 感知装置 |
JP6227219B2 (ja) * | 2010-12-24 | 2017-11-08 | 日本電波工業株式会社 | 感知センサー及び感知装置 |
US9435767B2 (en) * | 2012-09-04 | 2016-09-06 | Syracuse University | Sensor for sensing substances in an environment |
JP6106446B2 (ja) * | 2013-01-29 | 2017-03-29 | 日本電波工業株式会社 | 感知センサー及び感知装置 |
JP2013145249A (ja) * | 2013-04-25 | 2013-07-25 | Shimizu Corp | ガスモニタリング装置 |
RU2632997C1 (ru) * | 2016-05-24 | 2017-10-11 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Пьезорезонансный датчик для определения относительной влажности воздуха |
JP2018004456A (ja) * | 2016-07-01 | 2018-01-11 | 株式会社日立製作所 | 油分分析装置及び油分測定方法 |
CN107881087B (zh) * | 2017-12-26 | 2023-08-08 | 华测检测认证集团股份有限公司 | 用于食品微生物的检测装置 |
CN111384921B (zh) * | 2018-12-29 | 2022-07-19 | 中芯集成电路(宁波)有限公司上海分公司 | 晶体谐振器与控制电路的集成结构及其集成方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09145583A (ja) * | 1995-11-14 | 1997-06-06 | Dev Center For Biotechnol | カートリッジ状の圧電センサチップ |
JPH11183479A (ja) | 1997-10-16 | 1999-07-09 | Fuji Electric Co Ltd | 溶液測定用センサ及び溶液成分測定方法 |
JP2006029873A (ja) | 2004-07-13 | 2006-02-02 | Nippon Dempa Kogyo Co Ltd | 水晶センサ及び感知装置 |
JP2006194866A (ja) * | 2004-12-15 | 2006-07-27 | Nippon Dempa Kogyo Co Ltd | 水晶センサ及び感知装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3700559B2 (ja) * | 1999-12-16 | 2005-09-28 | 株式会社村田製作所 | 圧電音響部品およびその製造方法 |
AU2001283977B2 (en) * | 2000-08-08 | 2005-03-10 | Inverness Medical Switzerland Gmbh | Quartz crystal microbalance |
WO2004001392A1 (en) * | 2002-06-19 | 2003-12-31 | Biosensor Applications Sweden Ab (Publ) | System, device and method for detection of several individual analytes in a solution, and a disposible flow cell for use therein |
USD540700S1 (en) * | 2005-03-18 | 2007-04-17 | Nihon Dempa Kogyo Co., Ltd. | Crystal resonator for QCM measurement of toxic materials |
CN1815176A (zh) * | 2006-02-10 | 2006-08-09 | 张超 | 在线监测液体粘度和颗粒量的压电传感器和测量方法 |
JP4299325B2 (ja) * | 2006-08-30 | 2009-07-22 | 日本電波工業株式会社 | 水晶センサ及び感知装置 |
-
2006
- 2006-08-30 JP JP2006233963A patent/JP4299325B2/ja active Active
-
2007
- 2007-08-29 WO PCT/JP2007/067243 patent/WO2008026764A1/ja active Application Filing
- 2007-08-29 EP EP13182132.4A patent/EP2669654A2/en not_active Withdrawn
- 2007-08-29 CN CN2007800362871A patent/CN101523186B/zh not_active Expired - Fee Related
- 2007-08-29 EP EP07806698A patent/EP2058642A4/en not_active Withdrawn
- 2007-08-29 US US12/310,377 patent/US8176772B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09145583A (ja) * | 1995-11-14 | 1997-06-06 | Dev Center For Biotechnol | カートリッジ状の圧電センサチップ |
JPH11183479A (ja) | 1997-10-16 | 1999-07-09 | Fuji Electric Co Ltd | 溶液測定用センサ及び溶液成分測定方法 |
JP2006029873A (ja) | 2004-07-13 | 2006-02-02 | Nippon Dempa Kogyo Co Ltd | 水晶センサ及び感知装置 |
JP2006194866A (ja) * | 2004-12-15 | 2006-07-27 | Nippon Dempa Kogyo Co Ltd | 水晶センサ及び感知装置 |
Also Published As
Publication number | Publication date |
---|---|
CN101523186A (zh) | 2009-09-02 |
EP2058642A4 (en) | 2013-02-27 |
JP2008058086A (ja) | 2008-03-13 |
JP4299325B2 (ja) | 2009-07-22 |
EP2669654A2 (en) | 2013-12-04 |
CN101523186B (zh) | 2011-07-20 |
US20100236331A1 (en) | 2010-09-23 |
EP2058642A1 (en) | 2009-05-13 |
US8176772B2 (en) | 2012-05-15 |
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