WO2022123886A1 - 圧力センサ - Google Patents
圧力センサ Download PDFInfo
- Publication number
- WO2022123886A1 WO2022123886A1 PCT/JP2021/037129 JP2021037129W WO2022123886A1 WO 2022123886 A1 WO2022123886 A1 WO 2022123886A1 JP 2021037129 W JP2021037129 W JP 2021037129W WO 2022123886 A1 WO2022123886 A1 WO 2022123886A1
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- WO
- WIPO (PCT)
- Prior art keywords
- unit
- pressure
- output
- pressure sensor
- temperature
- Prior art date
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- 238000001514 detection method Methods 0.000 claims abstract description 70
- 238000006243 chemical reaction Methods 0.000 claims abstract description 58
- 238000012937 correction Methods 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
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- 238000004519 manufacturing process Methods 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- 230000001681 protective effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 101710194330 Acetyl-coenzyme A synthetase 2 Proteins 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 101000892301 Phomopsis amygdali Geranylgeranyl diphosphate synthase Proteins 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
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Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
Definitions
- the present invention relates to a pressure sensor.
- the sensor unit built into the liquid-sealed semiconductor pressure sensor has a diaphragm that is supported inside the joint and separates the pressure detection chamber from the liquid-sealed chamber, which will be described later, and silicone oil that is formed above the diaphragm and serves as a pressure transmission medium.
- the liquid sealing chamber to be stored, the sensor chip arranged in the liquid sealing chamber to detect the pressure fluctuation of silicone oil via the diaphragm, the chip mount member supporting the sensor chip, and the circumference of the chip mount member in the through hole of the housing are sealed.
- Hermetic glass and a group of terminals for transmitting an output signal from the sensor chip and supplying power to the sensor chip are included as main elements.
- a relay board so as to be compatible with various control circuits of an air conditioning system connected to a semiconductor pressure sensor.
- a relay board has a conversion circuit in which the terminal group of the above-mentioned sensor unit is connected via a plurality of electric wires to which the terminal group is electrically connected.
- the conversion circuit includes a step-up circuit section or a step-down circuit section for boosting or stepping down the drive voltage of the control circuit to the drive voltage of the sensor unit.
- the sensor chip of the sensor unit is subjected to, for example, span adjustment (use) of the output characteristics of the sensor chip under the atmosphere in a constant temperature bath maintained at a predetermined internal temperature. After the adjustment of the output characteristics in the temperature range) etc. is performed, the setting data representing them may be written in the storage unit in the sensor chip, and then, for example, an aging test may be performed on the sensor chip of the sensor unit alone. ..
- the sensor chip of the sensor unit judged to be a non-defective product may be connected to the relay board as described above depending on the destination in the post-process of the manufacturing process.
- the sensor chip of the sensor unit connected to the relay board is again inspected at room temperature to see if the characteristics of the output signal output from the output section of the relay board are within the predetermined allowable range. It is done in.
- the resolution of the sensor chip and the characteristics of the output signal output from the output section of the relay board due to the manufacturing variation of the electronic components used in the conversion circuit of the relay board have a predetermined allowable range. Some of the items may not be accurate.
- the manufacturing cost of the electronic components constituting the semiconductor pressure sensor is high and it is not a good idea.
- the present invention is a pressure sensor, and the output characteristics of the sensor chip of the sensor unit connected to the conversion circuit of the relay board without being affected by the manufacturing error of the electronic component. It is an object of the present invention to provide a pressure sensor capable of suppressing variation. Means to solve problems
- the pressure sensor according to the present invention includes a metal diaphragm that receives the pressure of a liquid, a housing member that forms a liquid sealing chamber for sealing oil together with the diaphragm, and a liquid sealing chamber. From the pressure sensor chip, which is fixed to the housing member and integrally formed with the pressure detection unit that detects the pressure in the liquid sealing chamber and the integrated electronic circuit that corrects the output signal of the pressure detection unit, and the pressure sensor chip. It is a liquid-sealed pressure sensor equipped with a lead pin for deriving an electric signal to the outside, and is characterized by being provided with a conversion board connected to an input unit and an output unit of a pressure sensor chip to convert electrical input / output. And.
- the pressure sensor chip further adjusts the span between the output unit that sends out the detection output from the pressure detection unit and the detection output of the pressure detection unit, and also adjusts the span of the detection output from the pressure detection unit, and also adjusts the detection signal from the temperature detection unit that forms part of the pressure detection unit. It may include a correction unit that performs temperature compensation for span adjustment according to a temperature change of the detection output of the pressure detection unit, and a storage unit that stores data representing the adjustment amount and the temperature compensation amount from the correction unit. ..
- the correction unit is a pressure span adjustment unit that adjusts the span of the detection output of the pressure detection unit, and a temperature change of the detection output of the pressure detection unit based on the detection signal from the temperature detection unit that forms a part of the pressure detection unit. It may include a temperature span adjusting unit that performs temperature compensation for span adjustment according to the above, and a temperature offset adjusting unit that adjusts an offset amount to be added to the detected output of the output unit based on a detection signal from the temperature detecting unit.
- the storage unit may store data representing the adjustment amount of the pressure span adjustment unit, the temperature compensation amount of the temperature span adjustment unit, and data representing the offset amount of the temperature offset adjustment unit.
- the sensor chip is arranged in the liquid sealing chamber of the sensor unit that detects the pressure in the pressure chamber and sends out the detection output
- the conversion substrate is formed in the sensor unit accommodating portion accommodating the sensor unit so as to be isolated from the liquid sealing chamber. It may be arranged in the internal space.
- the conversion board may be one that steps down the power supply voltage and supplies it to the input portion of the pressure sensor chip, or the conversion board may be one that boosts the power supply voltage and supplies it to the input section of the pressure sensor chip. Further, the conversion board may be one that converts the signal of the output unit of the pressure sensor chip into a current signal. Further, the conversion board may be one that converts the signal of the output unit of the pressure sensor chip into a digital signal. Effect of the invention
- the correction unit of the sensor chip operates so as to match the target value of the output of the output conversion unit of the conversion board with the output characteristics of the output unit. It is possible to suppress variations in the output characteristics of the sensor chip of the sensor unit connected to the conversion circuit of the relay board without being affected by the error.
- FIG. 1 is a block diagram showing a configuration of a sensor chip and a conversion board used in an example of a pressure sensor according to the present invention.
- FIG. 2 is a block diagram schematically showing the configuration of the correction unit and the storage unit shown in FIG.
- FIG. 3 is a cross-sectional view schematically showing an overall configuration of an example of a pressure sensor according to the present invention.
- FIG. 3 shows the overall configuration of an example of the pressure sensor according to the present invention, and is, for example, a liquid-sealed semiconductor pressure sensor. It was
- the pressure sensor defines a detection output signal from a sensor chip 16 described later, which is connected to a joint member 30 connected to a pipe to which a fluid for which pressure should be detected is guided and a base plate 28 of the joint member 30 to accommodate a sensor unit. It is configured to include a sensor unit accommodating portion for supplying to the measuring device 42 (see FIG. 1).
- the metal joint member 30 has an internal female threaded portion 30 fs screwed into the male threaded portion of the above-mentioned pipe connection portion.
- the female threaded portion 30fs communicates with the port 30a of the joint member 30 that guides the fluid supplied from the direction indicated by the arrow P to the pressure chamber 28A described later.
- One open end of the port 30a is open toward the pressure chamber 28A formed between the base plate 28 of the joint member 30 and the diaphragm 32 of the sensor unit described later.
- a gas or liquid as a fluid is supplied into the pressure chamber 28A through the port 30a of the joint member 30.
- the lower end surface of the housing 62 of the sensor unit is mounted on the base plate 28.
- the sensor unit that detects the pressure in the pressure chamber 28A and sends out the detection output signal is a cylindrical housing 62, a metal diaphragm 32 that separates the pressure chamber 28A and the inner peripheral portion of the housing 62, and a sensor chip 16.
- the outer peripheral edge of the diaphragm 32 is supported by one lower end surface of the housing 62 facing the pressure chamber 28A described above.
- the diaphragm protective cover 34 that protects the diaphragm 32 arranged in the pressure chamber 28A has a plurality of communication holes.
- the peripheral edge of the diaphragm protective cover 34 is joined to the lower end surface of the stainless steel housing 62 by welding together with the outer peripheral edge of the diaphragm 32.
- a predetermined amount of silicone oil or a fluorine-based inert liquid is used as the pressure transfer medium PM. Is filled via the oil filling pipe 58. One end of the oil filling pipe 58 is crushed and closed after being filled with oil.
- a metal potential adjusting member 37 is further supported on the lower end surface of the hermetic glass 64 between the sensor chip 16 and the diaphragm 32 arranged in the recess formed at the end of the hermetic glass 64 as an insulating member. ing.
- the potential adjusting member 37 is connected to, for example, a terminal connected to the zero potential of the circuit of the sensor chip 16.
- the insulating member for fixing the input / output terminal group and the oil filling pipe 58 between the outer peripheral surface of the chip mount member 68 and the inner peripheral surface of the housing 62 is not limited to such an example, and the input / output member is, for example, input / output. It may be a ceramic, a heat-resistant resin, or the like that ensures the airtightness of the liquid sealing chamber 33 while insulating the terminal group or the like.
- the lead pin 60LP6 and the lead pin 60LP7 are, for example, two power supply terminals (Vcc, GND), and the lead pin 60LP8 is, for example, an external output terminal (Vout) for transmitting an output signal from the sensor chip 16.
- the other lead pins 60LP1 to 60LP5 each have five adjustment terminals. Both ends of the lead pins 60LP1 to 60LP5 project toward the recess formed at the end of the hermetic glass 64 described above and the conversion substrate 24 described later, respectively.
- Both ends of the lead pin 60LP6, the lead pin 60LP7, and the lead pin 60LP8 project toward the recess formed at the end of the hermetic glass 64 and the conversion substrate 24, respectively.
- One ends of the lead pin 60LP6, the lead pin 60LP7, and the lead pin 60LP8 are each connected to the lower end portion of the flexible wiring material 56.
- the sensor chip 16 and the lead pins 60LP1 to 60LP5, the lead pins 60LP6, the lead pins 60LP7, and the other ends of the lead pins 60LP8 are connected by a bonding wire Wi.
- the number of lead pins is not limited to such an example, and may be appropriately set according to the number of input / output ports of the sensor chip 16, for example.
- connection terminal 54ai 1 to 3
- the plurality of connection terminals 54ai penetrate the slits of the conversion board 24 described later and are provided on the terminal block 52a described later.
- Each connection terminal 54ai is, for example, an external output connection terminal (Vout) connected to one end of the above-mentioned lead pin 60LP6, lead pin 60LP7, and lead pin 60LP8 via a flexible wiring material 56, and a drive voltage supply connection terminal. (Vcc), a grounding connection terminal (GND).
- the outer shell of the sensor unit accommodating portion sandwiches the above-mentioned housing 62 between the cylindrical waterproof case 50 constituting the male connector 52, the base plate 28 of the joint member 30, and the connecting end of the waterproof case 50. It is formed by a connecting member 70 that connects the base plate 28 and the waterproof case 50.
- An opening 50a communicating with the internal space 50A is formed on the end surface of the connecting end of the resin waterproof case 50.
- the recessed internal space 50A is formed from an inner side surface of the waterproof case 50 forming the opening 50a and an uppermost end surface connected to the inner side surface.
- the conversion substrate 24 is adhered to the uppermost surface by the adhesive 27.
- a plurality of electronic components 25 are mounted on the mounting surface of the conversion board 24 facing the end of the hermetic glass 64.
- the upper end surface of the housing 62 is in contact with the peripheral edge of the opening 50a at the end surface of the connecting end of the waterproof case 50. Further, an O-ring groove 50G into which the O-ring 72 is inserted is formed on the peripheral edge of the opening 50a of the waterproof case 50.
- the waterproof case 50 of the male connector 52 is made of, for example, a resin material.
- the male connector 52 is a terminal block 52a that is integrally formed with a connection port 52FC that can be attached to and detached from a female connector (not shown) and a base of the connection port 52FC to support the above-mentioned connection terminal 54ai. It is composed of and.
- the conversion board 24 and the connection terminal 54ai are arranged on the above-mentioned uppermost end surface forming a part of the internal space 50A in the terminal block 52a.
- connection terminal 54ai The fixed terminal portion of the connection terminal 54ai is supported by a terminal block 52a formed at the lower end of the connection port portion 52FC.
- the engaging terminals of the connection terminals 54ai protruding from the terminal block 52a extend into the small diameter portion 52b that opens toward the connection port 52FC so as to be parallel to the central axis C of the connection port 52FC.
- FIG. 1 shows a system configuration including a sensor chip 16 composed of the above-mentioned one-chip IC and a conversion board (conversion circuit) 24.
- Such a semiconductor pressure sensor is configured to include a sensor unit that detects the pressure in the pressure chamber 28A and sends out a detection output signal.
- the sensor unit is made of metal, for example, as shown in FIG. 3, which separates the cylindrical stainless steel housing 62 from the pressure chamber 28A into which the fluid to be detected is introduced and the inner circumference of the housing 62.
- the sensor chip 16 has a diaphragm 32, a sensor chip 16 having a pressure detecting portion arranged in a liquid sealing chamber 33 at the inner peripheral portion of the housing 62 partitioned by the diaphragm 32, and the sensor chip 16 at one end via an adhesive layer.
- the hermetic glass 64 fixed between the outer peripheral surface of the member 68 and the inner peripheral surface of the housing 62 is included as a main element.
- the conversion board 24 is detachably connected to a predetermined measuring device 42 in the final step of the manufacturing process of the sensor unit described above.
- the conversion board 24 has a power supply voltage conversion unit 24A that lowers or boosts the voltage supplied from the output port of the measuring device 42 to the port 24b1 to a predetermined voltage and outputs the voltage to the port 16P1 of the sensor chip 16 through the port 24a1.
- the sensor output (DC 0.5V to 4.5V) sent from the port 16P2 of the sensor chip 16 to the port 24a2 is boosted (amplified) to a predetermined voltage (DC 0V to 10V), or a predetermined voltage (DC 0.3V to 3). It is configured to include an output conversion unit 24B that steps down (attenuates) to 0.0V) and sends the voltage down to the input port of the measuring device 42 via the port 24b2.
- the power supply voltage conversion unit 24A steps down the input power supply voltage (DC12V to 24V) supplied to the port 24b1 to the power supply voltage DC5V of the pressure detection element, or the input power supply voltage (DC3.3V) supplied to the port 24b1. ) Is boosted to the power supply voltage DC5V of the pressure detecting element.
- the output conversion unit 24B may, for example, convert the sensor output into a predetermined current (DC 4 mA to 20 mA) and output it. Further, the output conversion unit 24B may have a serial interface device such as UART: Universal Asynchronous Receiver Transmitter or I2C: Inter-Integrated Circuit, and may have a serial communication function.
- a serial interface device such as UART: Universal Asynchronous Receiver Transmitter or I2C: Inter-Integrated Circuit
- the sensor chip 16 is composed of, for example, a one-chip IC, and sends a detection output representing the fluid pressure from a gauge resistor for detecting the pressure to the signal processing unit 16B, and the pressure from the correction unit 16D described later with respect to the detection output.
- a pressure detection unit 16A that reflects the temperature span adjustment amount and the pressure span adjustment amount in the detection output based on the adjustment signal Acs1 that represents the span adjustment amount and the adjustment signal Acs2 that represents the temperature span adjustment amount, and data to be described later.
- a pressure detection unit so that the output voltage output from the output conversion unit 24B of the conversion board 24 becomes a predetermined target voltage according to a predetermined test temperature in a predetermined test constant temperature bath (not shown) based on the group Ca1.
- the correction unit 16D that adjusts the pressure span for the pressure detection output in 16A and adjusts the temperature offset according to the predetermined temperature characteristics for the output signal in the output unit 16C, and the predetermined temperature described later from the correction unit 16D.
- Each offset amount is added to the temperature offset adjustment signal Avs1 representing the offset amount according to the characteristics and the output signal representing the voltage value proportional to the pressure from the signal processing unit 16B based on Avs2 to form the output voltage. It is configured to include an output unit 16C.
- the sensor chip 16 sequentially transmits and stores updated data Dp, Dt, DS1 and DS2 from each register 16DR (RAM) of the correction unit 16D described later. It is equipped with a storage unit (EPROM) 16M.
- EPROM storage unit
- the storage unit 16M sequentially stores each data of each register 16DR (RAM) described later based on the write control signal CW1 that commands writing while updating, which is supplied to the port 16P5, at a predetermined memory address.
- the correction unit 16D includes, for example, as shown in FIG. 2, a temperature detection unit (gauge resistance unit) 16Dt that forms a part of the pressure detection unit 16A described above.
- the output signal St representing the current value flowing through the gauge resistance unit that changes according to the temperature from the temperature detection unit 16Dt is transmitted to the temperature span adjustment unit 16DT and the temperature offset adjustment unit 16Ds1, which will be described later, respectively.
- the correction unit 16D also includes a pressure span adjustment unit 16DP that adjusts the inclination of the characteristic line (linear function) representing the pressure detection output described above to set a range from the detected minimum pressure to the maximum pressure, and the temperature.
- the temperature span adjustment unit 16DT that adjusts the inclination of the characteristic line (first-order function) that represents the pressure detection output that changes according to the temperature, and the section (offset amount) of the characteristic line (first-order function) of the pressure detection output that changes according to the temperature. It is provided with a temperature offset adjusting unit 16Ds1 for adjusting (referred to as) and an offset adjusting unit 16Ds2.
- the adjustment of the correction unit 16D is performed based on the pressure span adjustment unit 16DP, the temperature span adjustment unit 16DT, the temperature detection unit 16Dt, and the offset adjustment unit 16Ds2 in the correction unit 16D.
- the adjusting units 16DP, 16DT, and 16Ds2 make adjustments based on the data group Ca1, the enable signal Ca2, and the clock signal Ca3 transmitted from the adjustment circuit (not shown) to the ports 16P8, 16P7, and 16P6, respectively.
- the sensor chip 16 and the conversion board 24 are placed in a constant temperature bath (not shown), the temperature of the constant temperature bath is controlled so that the sensor chip 16 and the conversion board 24 reach a predetermined temperature, and the pressure in the pressure chamber 28A becomes a predetermined pressure.
- the pressure is controlled so as to be.
- the adjustment of the correction unit 16D so that the output signal of the conversion board 24 becomes the target voltage is the pressure span adjustment unit 16DP, the temperature span adjustment unit DT, the temperature detection unit Dt, the offset adjustment unit 16Ds2, and the temperature offset adjustment unit in the correction unit 16D. Operate 16Ds1 to make adjustments.
- the adjustment is performed so that the output of the conversion board 24 becomes the target voltage for each combination of the temperature of one condition or more and the pressure of one condition or more.
- the final adjustment data of each adjustment unit 16DP, 16DT, 16Ds1 and 16Ds2 is stored in the storage unit (EPROM).
- the outputs of the output unit 16C of the sensor chip 16 and the output conversion unit 24B of the conversion board 24 are paired and adjusted by the correction unit 16D, which causes an error in the manufacture of electronic components. It is possible to suppress variations in the output characteristics of the sensor chip 16 of the sensor unit connected to the conversion circuit of the conversion board 24 without being affected.
- the sensor chip 16 and the conversion substrate 24 are connected to the sensor chip 16 by the measuring device 42 connected in the final step of the manufacturing process of the sensor unit after the aging test of the sensor chip 16. It is inspected whether or not the output from the output conversion unit 24B of the conversion board 24 connected to the sensor chip 16 which is regarded as a good product has a predetermined normal voltage value.
- the adjustment equipment of the pressure detection element can be standardized, and therefore the equipment cost can be saved. Further, even if the pressure detection element and the conversion board are manufactured with high accuracy, there is a problem that the error generated by combining them cannot be eliminated. On the other hand, as in the above example, by correcting the output of the output unit in a state where the pressure detecting element and the conversion board are combined, such a combination error can be eliminated. When the current consumption of the pressure detection element changes, the internal power supply state of the conversion board fluctuates, which causes an error, but this cannot be known until the pressure detection element and the conversion board are combined.
- each temperature offset amount is added to the output signal from the signal processing unit 16B to form an output voltage, but the output voltage is not limited to such an example.
- the signal processing unit 16B may form an output voltage based on the temperature offset adjustment signals from the temperature offset adjustment unit 16Ds1 and the offset adjustment unit 16Ds2.
Abstract
Description
課題を解決するための手段
発明の効果
16A 圧力検出部
16B 信号処理部
16C 出力部
16D 補正部
16M 記憶部
16DP 圧力スパン調整部
16DT 温度スパン調整部
16Ds1 温度オフセット調整部
16Ds2 オフセット調整部
24 変換基板
33 液封室
50 防水ケース
50A 内部空間
70 接続部材
Claims (9)
- 液体の圧力を受圧する金属製のダイヤフラムと、前記ダイヤフラムとともにオイルを封止する液封室を形成するハウジング部材と、前記液封室内で前記ハウジング部材に固着され、前記液封室内の圧力を検出する圧力検出部と前記圧力検出部の出力信号を補正する集積化された電子回路とが一体に形成された圧力センサチップと、前記圧力センサチップからの電気信号を外部に導出するためのリードピンとを備える液封型の圧力センサであって、
前記圧力センサチップの入力部および出力部に接続され電気的な入出力を変換する変換基板を備えることを特徴とする圧力センサ。 - 前記圧力センサチップは、さらに、前記圧力検出部からの検出出力を送出する出力部と、前記圧力検出部の検出出力のスパン調整を行うとともに、前記圧力検出部の一部を形成する温度検出部からの検出信号に基づいて前記圧力検出部の検出出力の温度変化に応じた前記スパン調整の温度補償を行う補正部と、前記補正部からの調整量および温度補償量をあらわすデータを格納する記憶部と、を含むことを特徴とする請求項1記載の圧力センサ。
- 前記補正部は、前記圧力検出部の検出出力のスパン調整を行う圧力のスパン調整部と、前記圧力検出部の一部を形成する温度検出部からの検出信号に基づいて前記圧力検出部の検出出力の温度変化に応じた前記スパン調整の温度補償を行う温度スパン調整部と、前記温度検出部からの検出信号に基づいて前記出力部の検出出力に対し加算するオフセット量を調整する温度オフセット調整部とを含むことを特徴とする請求項2記載の圧力センサ。
- 前記記憶部は、前記圧力のスパン調整部の調整量、および、温度スパン調整部の温度補償量をあらわすデータと、温度オフセット調整部のオフセット量をあらわすデータとを格納することを特徴とする請求項3記載の圧力センサ。
- 前記センサチップは、圧力室内の圧力を検出し検出出力を送出するセンサユニットの液封室内に配置され、前記変換基板は、該センサユニットを収容するセンサユニット収容部内に前記液封室と隔絶されて形成された内部空間に配置されることを特徴とする請求項1記載の圧力センサ。
- 前記変換基板は、電源電圧を降圧して前記圧力センサチップの前記入力部に供給することを特徴とする請求項1記載の圧力センサ。
- 前記変換基板は、電源電圧を昇圧して圧力センサチップの前記入力部に供給することを特徴とする請求項1記載の圧力センサ。
- 前記変換基板は、圧力センサチップの前記出力部の信号を電流信号に変換することを特徴とする請求項1記載の圧力センサ。
- 前記変換基板は、圧力センサチップの前記出力部の信号をデジタル信号に変換することを特徴とする請求項1記載の圧力センサ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN202180078702.XA CN116472444A (zh) | 2020-12-11 | 2021-10-07 | 压力传感器 |
JP2022568069A JP7395021B2 (ja) | 2020-12-11 | 2021-10-07 | 圧力センサ |
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JP2020205919 | 2020-12-11 | ||
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH10325772A (ja) * | 1997-05-27 | 1998-12-08 | Nissan Motor Co Ltd | 半導体圧力センサおよびその製造方法 |
JP2000214029A (ja) * | 1999-01-26 | 2000-08-04 | Matsushita Electric Works Ltd | 圧力センサ回路 |
JP2003130747A (ja) * | 2001-10-23 | 2003-05-08 | Nok Corp | 圧力センサ |
US20130285167A1 (en) * | 2012-04-27 | 2013-10-31 | Melexis Technologies Nv | Tmap sensor systems and methods for manufacturing those |
JP2018040758A (ja) * | 2016-09-09 | 2018-03-15 | 株式会社鷺宮製作所 | 圧力センサ、その中継基板、及び、その中継基板ユニット |
JP2019174382A (ja) * | 2018-03-29 | 2019-10-10 | 株式会社鷺宮製作所 | 圧力センサ |
-
2021
- 2021-10-07 WO PCT/JP2021/037129 patent/WO2022123886A1/ja active Application Filing
- 2021-10-07 JP JP2022568069A patent/JP7395021B2/ja active Active
- 2021-10-07 CN CN202180078702.XA patent/CN116472444A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10325772A (ja) * | 1997-05-27 | 1998-12-08 | Nissan Motor Co Ltd | 半導体圧力センサおよびその製造方法 |
JP2000214029A (ja) * | 1999-01-26 | 2000-08-04 | Matsushita Electric Works Ltd | 圧力センサ回路 |
JP2003130747A (ja) * | 2001-10-23 | 2003-05-08 | Nok Corp | 圧力センサ |
US20130285167A1 (en) * | 2012-04-27 | 2013-10-31 | Melexis Technologies Nv | Tmap sensor systems and methods for manufacturing those |
JP2018040758A (ja) * | 2016-09-09 | 2018-03-15 | 株式会社鷺宮製作所 | 圧力センサ、その中継基板、及び、その中継基板ユニット |
JP2019174382A (ja) * | 2018-03-29 | 2019-10-10 | 株式会社鷺宮製作所 | 圧力センサ |
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CN116472444A (zh) | 2023-07-21 |
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