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公开(公告)号：US10671103B2
公开(公告)日：2020-06-02
申请号：US15914321
申请日：2018-03-07
发明人： Yuzo Higuchi
摘要： A voltage supply apparatus for supplying a voltage to a detection circuit, including a power supply filter (4) and a control section (5) which supply a sensor drive voltage Vbg to a sensor device (2) having a ratiometric characteristic. The power supply filter (4) has supply paths PL1 and PL2. The control section (5) determines whether or not a switching determination time has elapsed after startup. In the case where the switching determination time has not yet elapsed, the power supply filter (4) supplies the sensor drive voltage Vbg through supply path PL1. In the case where the switching determination time has elapsed, the power supply filter (4) supplies the sensor drive voltage Vbg through supply path PL2. The response of the sensor drive voltage Vbg to a variation in power supply voltage Vcc is slower when supplied through the supply path PL2 than through the supply path PL1.
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公开(公告)号：US10261060B2
公开(公告)日：2019-04-16
申请号：US15168927
申请日：2016-05-31
发明人： Yuzo Higuchi
IPC分类号： G01N33/00 , G01N27/406 , G01N27/419
摘要： A sensor control apparatus controls a gas sensor including an electromotive force cell (a detection cell) and an oxygen pump cell. The sensor control apparatus includes an AD conversion section (31); a PID computation section (61); a first signal generation section (63) which generates a DAC control signal S1 (a pump current control signal) based on the results of PID performed by the PID computation section (61); a current DA conversion section (35); and a first signal generation section (63), a second signal generation section (65), and a signal output section (67) configured to selectively set a combination of the results of the computations performed by the PID computation section (61) and to generate a gas detection signal S2 based on the set combination of the computation results.
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公开(公告)号：US10139359B2
公开(公告)日：2018-11-27
申请号：US14965457
申请日：2015-12-10
发明人： Yuzo Higuchi , Tomonori Uemura
IPC分类号： G01N27/04 , G01N33/00 , F02D41/14 , F02D41/28 , G01N27/406
摘要： In a sensor control apparatus of a gas detection system, a multiplexer having received an instruction from a digital computation section outputs analog signals in the order of, for example, “signal 1, signal 2, signal 1, signal 3, signal 1, signal 4.” By outputting the analog signals while classifying each of them as a high occurrence-frequency signal which is high in output frequency or a low occurrence-frequency signal which is low in output frequency, the multiplexer can increase the sampling frequency of signal (analog signal of Vs+-COM voltage) which is the high occurrence-frequency signal. The sensor control apparatus can increase the sampling frequency in AD conversion of signal to a digital value, while suppressing an increase in the cost of an AD conversion section.
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4.发明授权Sensor control apparatus, sensor control system, and sensor control method 有权传感器控制装置，传感器控制系统和传感器控制方法公开(公告)号：US09448136B2
公开(公告)日：2016-09-20
申请号：US14224154
申请日：2014-03-25
发明人： Yuzo Higuchi , Hiroshi Inagaki
CPC分类号： G01M15/106
摘要： A sensor control apparatus which receives from a gas sensor (10) a sensor output signal Ip corresponding to the concentration of a specific gas component, and a pressure signal P output from a pressure sensor (20). The sensor control apparatus includes a computation section (38) which computes a specific component concentration which is corrected based on the pressure signal P so as to eliminate the influence of the pressure of the gas. The sensor control apparatus includes response adjustment sections (34) and (36) for adjusting the response rates of the sensor output signal Ip and the pressure signal P before being input to the computation section (38), the response rate exhibiting a time variation of the corresponding signal to a change in the pressure of the gas, such that the response rate of the sensor output signal Ip or the response rate of the pressure signal P, whichever is faster, approaches the slower of the two.
摘要翻译： 从气体传感器（10）接收与特定气体成分的浓度对应的传感器输出信号Ip和从压力传感器（20）输出的压力信号P的传感器控制装置。 传感器控制装置包括计算部，其计算基于压力信号P而校正的特定成分浓度，以消除气体的压力的影响。 传感器控制装置包括响应调节部分（34）和（36），用于在输入到计算部分（38）之前调节传感器输出信号Ip和压力信号P的响应速率，响应速率呈现时间变化 对应于气体压力变化的信号，使得传感器输出信号Ip的响应速率或压力信号P的响应速率（以较快速度为准）接近两者的较慢。
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公开(公告)号：US09541523B2
公开(公告)日：2017-01-10
申请号：US14224349
申请日：2014-03-25
发明人： Yuzo Higuchi , Tomonori Uemura
IPC分类号： G01N27/417
CPC分类号： G01N27/417
摘要： A sensor control apparatus (2) of a gas detection system (1) includes a first low-pass filter (46), a second low-pass filter (48), and a multiplexer (50) so as to provide different time constants for detection of a sensor output signal Vs1 and for detection of a response signal Vs2. When the sensor output signal Vs1 is detected, a signal whose frequency band is the same as that of Vs1 is input to the analog-to-digital conversion section (31) through the first low-pass filter (46). Therefore, the detection accuracy of Vs1 is increased. When Vs2 is detected, a signal whose frequency band is the same as that of Vs2 is input to the analog-to-digital conversion section (31) through the second low-pass filter (48).
摘要翻译： 气体检测系统（1）的传感器控制装置（2）包括第一低通滤波器（46），第二低通滤波器（48）和多路复用器（50），以便为 检测传感器输出信号Vs1并检测响应信号Vs2。 当检测出传感器输出信号Vs1时，其频带与Vs1相同的信号通过第一低通滤波器（46）被输入到模数转换部分（31）。 因此，Vs1的检测精度提高。 当检测到Vs2时，其频带与Vs2的频带相同的信号通过第二低通滤波器（48）输入到模数转换部（31）。
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公开(公告)号：US20140290337A1
公开(公告)日：2014-10-02
申请号：US14224349
申请日：2014-03-25
发明人： Yuzo Higuchi , Tomonori Uemura
IPC分类号： G01N27/417
CPC分类号： G01N27/417
摘要： A sensor control apparatus (2) of a gas detection system (1) includes a first low-pass filter (46), a second low-pass filter (48), and a multiplexer (50) so as to provide different time constants for detection of a sensor output signal Vs1 and for detection of a response signal Vs2. When the sensor output signal Vs1 is detected, a signal whose frequency band is the same as that of Vs1 is input to the analog-to-digital conversion section (31) through the first low-pass filter (46). Therefore, the detection accuracy of Vs1 is increased. When Vs2 is detected, a signal whose frequency band is the same as that of Vs2 is input to the analog-to-digital conversion section (31) through the second low-pass filter (48).
摘要翻译： 气体检测系统（1）的传感器控制装置（2）包括第一低通滤波器（46），第二低通滤波器（48）和多路复用器（50），以便为 检测传感器输出信号Vs1并检测响应信号Vs2。 当检测出传感器输出信号Vs1时，其频带与Vs1相同的信号通过第一低通滤波器（46）被输入到模数转换部分（31）。 因此，Vs1的检测精度提高。 当检测到Vs2时，其频带与Vs2的频带相同的信号通过第二低通滤波器（48）输入到模数转换部（31）。
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公开(公告)号：US10928357B2
公开(公告)日：2021-02-23
申请号：US16137172
申请日：2018-09-20
发明人： Yuzo Higuchi
IPC分类号： G01N27/417 , G01N27/406 , G01N27/409 , G01N27/41 , G01N27/419
摘要： A sensor control apparatus includes a current control section, a first condition judgment section, a second condition judgment section, a deterioration detection energization section, and a deterioration voltage detection section. The current control section controls pump current such that electromotive force cell voltage becomes equal to a control target voltage. The first condition judgment section judges whether or not a first deterioration detection condition is satisfied. The second condition judgment section judges whether or not a second deterioration detection condition is satisfied when the first deterioration detection condition is satisfied. The deterioration detection energization section supplies deterioration detection current to the oxygen concentration detection cell when the second deterioration detection condition is satisfied. The deterioration voltage detection section detects a deterioration detection voltage generated in the oxygen concentration detection cell after a deterioration detection time following the supply of the deterioration detection current has been started.
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公开(公告)号：US10746689B2
公开(公告)日：2020-08-18
申请号：US15899184
申请日：2018-02-19
发明人： Yuzo Higuchi , Satoru Abe , Koji Ishibashi
IPC分类号： G01N27/406 , G01N27/419 , G01N27/407 , G01N27/417 , G01N33/00 , G01N27/414 , G01N27/12
摘要： A sensor element drive circuit is a circuit including a plurality of semiconductor elements formed on a semiconductor substrate for realizing a current control function and a switching function. The current control function is a function of controlling the current flowing between electrodes such that the potential difference between electrodes becomes constant. The switching function is a function for switching between a connected state in which the electrodes are electrically connected to a sensor control apparatus and a cut-off state in which electrical continuity therebetween is broken. When one of an Ip+ terminal, a COM terminal, and a Vs+ terminal is determined to have an anomalous potential, the sensor control apparatus causes the sensor element drive circuit to perform switching from the connected state to the cut-off state, and connects the semiconductor substrate to a negative voltage lower than a ground potential applied to the sensor element drive circuit.
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公开(公告)号：US10557841B2
公开(公告)日：2020-02-11
申请号：US14990535
申请日：2016-01-07
发明人： Yuzo Higuchi
IPC分类号： G01N33/00
摘要： A sensor control apparatus controls a gas sensor which measures the concentration of oxygen contained in exhaust gas. A current DA converter of the sensor control apparatus supplies a current having a current value designated by a control section (hereinafter referred to as the designated current value) to a label resistor having a resistance previously set so as to represent the characteristic of the gas sensor (hereinafter referred to as the characteristic resistance). Further, the control section of the sensor control apparatus sets the designated current value to a plurality of values in accordance with the characteristic resistance of the label resistor.
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公开(公告)号：US10451586B2
公开(公告)日：2019-10-22
申请号：US14870398
申请日：2015-09-30
发明人： Yuzo Higuchi , Tomonori Uemura
IPC分类号： G01N27/41 , G01N27/406 , G01N27/409 , G01N27/417 , G01N27/419 , G01N27/407 , G01N27/416
摘要： A gas sensor system (1) including a gas sensor (2) and a sensor control section (40) including detection circuits (41), (42) and (43) for detecting the terminal potentials V1, V2, and V3 of first to third terminal T1 through T3. The sensor control section (40) includes a circuit (44) for applying an examination potential Vex to the second terminal T2, a first circuit (45) which has a predetermined resistance R1c and disconnectably connects the first terminal T1 and the second terminal T2, a second circuit (46) which has a predetermined resistance R2c and disconnectably connects the second terminal T2 and the third terminal T3, and terminal potential detection means S5 for detecting the terminal potentials V1, V2, and V3 using the detection circuits in a state in which the examination potential Vex is applied to the second terminal T2 and switches SW1 and SW2 are turned on.
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