KR100950387B1 - Sensor apparatus - Google Patents

Abstract

The sensor device has a time measuring unit that measures the viewpoint information and adds the viewpoint information to an output relating to the generation of the failure detection signal output from the failure diagnosis unit and an output relating to the generation of the sense signal. As a result, the failure detection signal and the sense signal can be associated with the viewpoint information. Or it has an output circuit part which outputs a failure detection signal and the sense signal at the same time as the failure detection signal in a time division manner.

Description

Sensor device {SENSOR APPARATUS}

The present invention relates to a sensor device for use in automobiles, various electronic devices, and the like.

9 is a block diagram of an inertial sensor that is an example of a conventional sensor device. The sensor device includes drive circuit sections 1A and 1B, detection elements 2, detection circuit sections 3A and 3B, processing circuit sections 4A and 4B, output circuit sections 5A and 5B, and fault diagnosis. Has a circuit (6). The drive circuit sections 1A and 1B output drive signals. The drive signal from the drive circuit parts 1A and 1B is input to the detection element 2. The detecting element 2 includes an angular velocity detector and an acceleration detector. The detection circuit sections 3A and 3B take out a response signal from the detection element 2. The processing circuit sections 4A and 4B extract the sense signals from the response signals from the detection circuit sections 3A and 3B. The output circuit sections 5A and 5B output the sense signals from the processing circuit sections 4A and 4B. The fault diagnosis circuit 6 determines whether the fault diagnosis unit is normal or abnormal, and outputs a fault detection signal based on the result. Here, at least one of the detection circuit sections 3A, 3B, the processing circuit sections 4A, 4B, and the output circuit sections 5A, 5B becomes a failure diagnosis section. Moreover, patent document 1 is known as prior art document information which concerns on this application.

In such a conventional sensor device, there is a problem in improving the reliability. That is, in the above configuration, since the sense signal and the failure detection signal are not correlated in time, it is impossible to accurately determine instantaneously whether the output sense signal is normal or failure. Therefore, there is a possibility that a control target such as a car controlled based on the output of this sensor device is controlled using a sense signal at the time of failure.

[Patent Document 1] Japanese Patent Application Laid-Open No. 8-327363

The present invention is a sensor device with improved reliability. The sensor device of the present invention has a time measuring unit that measures the viewpoint information and adds the viewpoint information to the output relating to the generation of the failure detection signal output from the failure diagnosis unit and the output relating to the generation of the sense signal. As a result, the failure detection signal and the sense signal can be associated with the viewpoint information. Or it has an output circuit part which outputs a failure detection signal and the sense signal at the same time as the failure detection signal in a time division manner.

By either of these configurations, it is possible to correlate the failure detection signal and the sense signal in time. Therefore, it is possible to accurately determine whether the output sense signal is normal or at fault. As a result, the reliability of the control based on the sense signal can be improved.

1 is a block diagram of a sensor device according to Embodiment 1 of the present invention.

FIG. 2 is a diagram illustrating a response signal to which viewpoint information is added in the sensor device shown in FIG. 1.

3 is a diagram illustrating a failure detection signal to which viewpoint information is added in the sensor device shown in FIG. 1.

4 is a block diagram of another sensor device according to Embodiment 1 of the present invention.

5 is a block diagram of a sensor device according to Embodiment 2 of the present invention.

FIG. 6 is a diagram illustrating a change of an output signal of the sensor device shown in FIG. 5.

7 is a block diagram of another sensor device according to Embodiment 2 of the present invention.

FIG. 8 is a diagram illustrating a change in an output signal of the sensor device shown in FIG. 7.

9 is a block diagram of a conventional sensor device.

[Description of the code]

11A: first drive circuit section (drive circuit section)

11B: second drive circuit section (drive circuit section)

12: detection element

12A: angular velocity detecting element (first detecting element)

12B: acceleration detection element (second detection element)

13A, 113A: 1st detection circuit part (detection circuit part)

13B, 113B: 2nd detection circuit part (detection circuit part)

14A, 114A: first processing circuit portion (processing circuit portion)

14B and 114B: second processing circuit section (processing circuit section)

15A: first output circuit portion (output circuit portion)

15B: second output circuit portion (output circuit portion)

16: fault diagnosis circuit

16A: 1st failure diagnosis circuit (fault diagnosis circuit)

16B: second failure diagnosis circuit (fault diagnosis circuit)

17: time measuring unit

18, 19, 20: output circuit

30: terminal

50A, 51A: first control circuit

50B, 51B: second control circuit

(Embodiment 1)

1 is a block diagram of a sensor device according to Embodiment 1 of the present invention. The sensor device in the present embodiment includes the first control circuit 50A, the second control circuit 50B, the detection element unit 12, the failure diagnosis circuit 16, and the time measurement unit 17. Has The first control circuit 50A includes a first drive circuit section (hereinafter referred to as a drive circuit section) 11A, a first detection circuit section (hereinafter referred to as a detection circuit section) 13A, and a first processing circuit section (hereinafter referred to as a processing circuit section) 14A. ) And a first output circuit section (hereinafter, referred to as an output circuit section) 15A. Similarly, the second control circuit 50B includes a second drive circuit section (hereinafter referred to as a driving circuit section) 11B, a second detection circuit section (hereinafter referred to as a detection circuit section) 13B, and a second processing circuit section (hereinafter referred to as a processing circuit section). 14B and a second output circuit section (hereinafter, referred to as an output circuit section) 15B.

The drive circuit sections 11A and 11B output drive signals. The drive signal from the drive circuit portion 11A is input to the angular velocity detecting element 12A, which is the first detecting element of the detecting element portion 12. Moreover, the drive signal from the drive circuit part 11B is input into the acceleration detection element 12B which is the 2nd detection element of the detection element part 12. As shown in FIG. The detection circuit sections 13A and 13B take out a response signal from the detection element section 12. The processing circuit sections 14A and 14B take out the first and second sense signals from the response signals from the detection circuit sections 13A and 13B. The first and second monitor signals may be taken out at the same time. The output circuit sections 15A and 15B output the sense signals from the processing circuit sections 14A and 14B. The fault diagnosis circuit 16 determines whether the fault diagnosis unit is normal or abnormal, and outputs a fault detection signal based on the result. Here, at least one of the detection circuit sections 13A and 13B, the processing circuit sections 14A and 14B, and the output circuit sections 15A and 15B is a failure diagnosis section.

When the processing circuit sections 14A and 14B extract the monitor signal, the driving circuit section 11A can adjust the vibration amplitude of the first driving signal based on the first monitor signal from the processing circuit section 14A. Similarly, the drive circuit part 11B can adjust the vibration amplitude of a 2nd drive signal based on the 2nd monitor signal from the process circuit part 14B.

Then, the time measuring unit 17 measures the viewpoint information and adds the viewpoint information to the output from the failure diagnosis unit to associate the failure detection signal with the sense signal by the viewpoint information.

As an example, the case where the detection circuit parts 13A and 13B are the fault diagnosis part is demonstrated, referring FIGS. 2 is a diagram illustrating a response signal to which viewpoint information is added in the sensor device shown in FIG. 1, and FIG. 3 is a diagram illustrating a failure detection signal to which viewpoint information is added.

First, the time measuring unit 17 is electrically connected to the detection circuit units 13A and 13B. As a result, the time measuring unit 17 transmits the measured time point information to the detection circuit units 13A and 13B. And as shown in FIG. 2, when outputting response signal r011-r998 from detection circuit part 13A, 13B, viewpoint information t01-t99 is added. Then, the response signals r011 to r998 to which the viewpoint information t01 to t99 are added are output as the sense signals from the output circuit units 15A and 15B via the processing circuit units 14A and 14B. Also in this case, the viewpoint information t01 to t99 is added to the sense signal.

On the other hand, the fault diagnosis circuit 16 determines whether the detection circuit parts 13A and 13B which are the fault diagnosis parts are normal or abnormal. The fault diagnosis circuit 16 outputs a fault detection signal based on the result. Also, when the detection circuits 13A and 13B output the information on the failure detection toward the failure diagnosis circuit 16, the same viewpoint information t01 to t99 as the response signals r011 to r998 described above are added. Therefore, even when the fault diagnosis circuit 16 generates and outputs the fault detection signals f011 to f998 from the fault detection information, as shown in Fig. 3, the time information is provided to the fault detection signals f011 to f998. (t01 to t99) are added.

With this configuration, it is possible to associate the failure detection signals f011 to f998 with the sense signals in time using the viewpoint information t01 to t99. That is, the time measuring unit 17 adds viewpoint information to the output relating to the generation of the failure detection signal output from the failure diagnosis unit and the output relating to the generation of the sense signal. As a result, the failure detection signal and the sense signal are associated with the viewpoint information. Therefore, it is possible to accurately determine whether the output sense signal is normal or at fault. As a result, it is possible to reduce the likelihood that a control target such as a car controlled based on the output of the sensor device is controlled using the sense signal at the time of failure. In this manner, reliability is improved.

In the present embodiment, two of the angular velocity detection element 12A and the acceleration detection element 12B are used as the detection element portion 12. And as a circuit structure corresponding to these, it demonstrated using the structure which has drive circuit part 11A, 11B, detection circuit part 13A, 13B, and processing circuit part 14A, 14B. However, it is good also as a structure which makes one detection element and installs only one drive circuit part, a detection circuit part, and a processing circuit part as a circuit structure corresponding to this.

In addition, in this embodiment, although the fault diagnosis part was made into the detection circuit parts 13A and 13B, the example which used the same part in each of the angular velocity detector and the acceleration detector as the fault diagnosis part was demonstrated, but it is not limited to this structure. . The two failure diagnosis sections are the same in each of the angular velocity detector and the acceleration detector, as the first failure diagnosis section is the output circuit section 15A and the second failure diagnosis section is the processing circuit section 14B. It does not matter even if it is set as the structure which is not. In this case, first sense information common to both the sense signal from the output circuit unit 15A and the information related to the failure detection outputted by the output circuit unit 15A toward the failure diagnosis circuit 16 may be obtained. It is necessary to add to the information regarding the failure detection. On the other hand, the second time information common to both the sense signal from the processing circuit unit 14B and the information related to the failure detection outputted by the processing circuit unit 14B toward the failure diagnosis circuit 16 is sensed and the failure detection. It needs to be added to the information about.

In the present embodiment, any part of each of the angular velocity detection system and the acceleration detection system is a failure diagnosis unit, but the failure diagnosis circuit 16 may be configured to have a plurality of failure diagnosis units. . Specifically, for example, the failure diagnosis circuit 16 is electrically connected to all of the detection circuit sections 13A, 13B, the processing circuit sections 14A, 14B, and the output circuit sections 15A, 15B, and the respective failure detection signals. It is possible to make the configuration to output the. By such a configuration, a failure that cannot be detected by one failure diagnosis unit can be detected by a failure diagnosis by a plurality of failure diagnosis units, and the accuracy of the failure detection can be improved.

In addition, in this embodiment, although demonstrated using the angular velocity detection element 12A, the acceleration detection element 12B, etc., it is possible to implement also about other various sensor apparatuses, such as a pressure sensor and a temperature sensor.

In addition, when the fault diagnosis circuit 16 outputs a fault detection signal indicating that the fault is abnormal, the fault diagnosis unit outputs a sense signal having the time point information at the same time point as that of the fault detection signal. It is preferable to set it as the structure which does not output. That is, when receiving a sense signal having the viewpoint information at the same time as the viewpoint information of the failure detection signal, the output circuits 15A and 15B prohibit outputting the sense signal to the output circuit units 15A and 15B itself. . Alternatively, a control unit (not shown) may be provided to prohibit output of the sense signal to the output circuit units 15A and 15B. Moreover, you may output the signal of the level which cannot be detected by the control object side of an automobile etc. to the output circuit part 15A, 15B by the output circuit part 15A, 15B itself or the control part mentioned above. The output circuits 15A and 15B do not have to substantially output the sense signal, and the method is not limited.

This control eliminates the necessity of judging whether or not the sense signal associated with it is used on the basis of the failure detection signal from the sensor device on the control target side such as an automobile. That is, it is possible to prevent the control target from being controlled by using the sense signal corresponding to the failure detection signal.

As a specific structure, the output circuit part control circuit (not shown) is provided electrically connected to the fault diagnosis circuit 16, or in the fault diagnosis circuit 16 or in the output circuit parts 15A and 15B. The output circuit section control circuit judges whether or not the failure diagnosis circuit 16 outputs a failure detection signal indicating an abnormality of the failure diagnosis section. When the output circuit section control circuit judges the output of the failure detection signal, the output circuit section control circuit does not output from the output circuit sections 15A and 15B a sense signal having the viewpoint information at the same time as the viewpoint information of the failure detection signal. In this way, it is possible to prevent the sense signal having the viewpoint information at the same time as the failure detection signal.

Next, another example of the sensor device according to the present embodiment will be described with reference to FIG. 4. 4 is a block diagram of another sensor device in the present embodiment. In this structure, the output circuit part 18 which outputs the 1st, 2nd sense signal from the process circuit part 14A, 14B and the fault detection signal from the fault diagnosis circuit 16 is common. The output circuit 18 digitally outputs the sense signal and the failure detection signal in a time division manner. By such a configuration, the number of terminals 30 can be reduced, and the sensor device can be miniaturized.

In addition, the output circuit unit 18 outputs the first and second sense signals and the failure detection signals associated with each other based on the viewpoint information in a time division manner. Therefore, the control object side is preferable because the processing for linking the sense signal and the failure detection signal associated with each other based on the viewpoint information can be omitted.

In addition, even in the configuration shown in FIG. 4, when the failure diagnosis circuit 16 outputs a failure detection signal indicating that the failure diagnosis unit is abnormal, a sense signal having viewpoint information at the same time point as that of the failure detection signal. It is preferable that the output circuit section 18 does not output. This control eliminates the necessity of judging whether or not the sense signal corresponding to the control signal side is used based on the failure detection signal from the sensor device. That is, it is possible to prevent the control target from being controlled by using the sense signal corresponding to the failure detection signal.

As a specific structure, an output circuit part control circuit (not shown) is provided electrically connected to the fault diagnosis circuit 16 or in the fault diagnosis circuit 16 or in the output circuit part 18. The output circuit section control circuit judges whether or not the failure diagnosis circuit 16 outputs a failure detection signal indicating an abnormality of the failure diagnosis section. When the output circuit section control circuit judges the output of the failure detection signal, the output circuit section control circuit does not output from the output circuit section 18 a sense signal having the viewpoint information at the same time as the viewpoint information of the failure detection signal. In this way, it is possible to prevent the sense signal having the viewpoint information at the same time as the failure detection signal.

In addition, also in the structure shown in FIG. 4, a fault diagnosis part may make any part in each of an angular velocity detector and an acceleration detector a fault diagnosis part. Moreover, it is good also as a structure which has a some trouble diagnosis part. In the configuration having a plurality of failure diagnosis units, a failure that cannot be detected by one failure diagnosis unit can be detected by a failure diagnosis by a plurality of failure diagnosis units, thereby improving the accuracy of the failure detection.

In addition, in this embodiment, since it is necessary to add viewpoint information, the trouble diagnosis part needs to be a digital circuit. Therefore, the drive circuit sections 11A and 11B are not included in the failure diagnosis section. In addition, in the configuration of FIG. 4, since the failure diagnosis circuit 16 is located in front of the output circuit section 18, when the output circuit section 18 is broken, the output of the sense signal in an abnormal state is abnormal or not. It is indistinguishable. Therefore, in the configuration of FIG. 4, the failure diagnosis unit does not include the output circuit unit 18.

(Embodiment 2)

5 is a block diagram of a sensor device according to Embodiment 2 of the present invention. The sensor device in this embodiment differs from the configuration shown in FIG. 4 in that the first control circuit 51A and the second control circuit 51B are replaced with the first control circuit 50A and the second control circuit 50B. ), There is no time measuring unit 17. In addition, the output circuit unit 18 is provided instead of the output circuit unit 18. Since the other structure is the same as that of Embodiment 1, description is abbreviate | omitted.

The first control circuit 51A includes a first drive circuit section (hereinafter referred to as a drive circuit section) 11A, a first detection circuit section (hereinafter referred to as a detection circuit section) 113A, and a first processing circuit section (hereinafter referred to as a processing circuit section) 114A. Has The second control circuit 51B includes a second driving circuit section (hereinafter referred to as a driving circuit section) 11B, a second detection circuit section (hereinafter referred to as a detection circuit section) 113B, and a second processing circuit section (hereinafter referred to as a processing circuit section) 114B. Has

The detection circuit unit 113A extracts the first response signal from the angular velocity detecting element 12A. The detection circuit portion 113B extracts the second response signal from the acceleration detection element 12B. The first response signal from the detection circuit portion 113A is input to the processing circuit portion 114A. The processing circuit unit 114A extracts the first sense signal from the first response signal. At the same time, the first monitor signal may be taken out. The second response signal from the detection circuit portion 113B is input to the processing circuit portion 114B. The processing circuit section 114B extracts the second sense signal from the second response signal. At the same time, the second monitor signal may be taken out.

When the processing circuit sections 114A and 114B extract the monitor signal, the driving circuit section 11A can adjust the vibration amplitude of the first driving signal based on the first monitor signal from the processing circuit section 114A. Similarly, the drive circuit part 11B can adjust the vibration amplitude of a 2nd drive signal based on the 2nd monitor signal from the process circuit part 114B.

The failure diagnosis circuit 16 is electrically connected to at least one of the drive circuit portion 11A, the detection circuit portion 113A, and the processing circuit portion 114A. The failure diagnosis circuit 16 is also electrically connected to at least one of the drive circuit section 11B, the detection circuit section 113B, and the processing circuit section 114B. That is, at least one of the drive circuit portion 11A, the detection circuit portion 113A, and the processing circuit portion 114A is a first failure diagnosis portion. At least one of the drive circuit portion 11B, the detection circuit portion 113B, and the processing circuit portion 114B is a second failure diagnosis portion. The output circuit unit 19 digitally outputs the failure detection signal from the failure diagnosis circuit 16 and the first and second sense signals from the processing circuit units 114A and 114B in a time division manner.

6 is a diagram showing the shape of the digital output from the output circuit unit 19. FIG. The first and second sense signals output from the processing circuits 114A and 114B are changing with time. Similarly, the failure detection signal output from the failure diagnosis circuit 16 also changes with time. When the first and second sense signals and the failure detection signal are input to the output circuit unit 19, the output circuit unit 19 outputs the information of the first and second sense signals and the failure detection signals corresponding thereto at each timing. Digital output in time division.

In this way, the output circuit unit 19 digitally outputs the failure detection signal and the first and second sense signals at the same time as the failure detection signal in a time division manner. As a result, it is possible to determine whether the first and second sense signals are the results at normal or abnormal conditions.

In the example shown in FIG. 6, the determination by the failure detection signal is "normal" at the time t _s1 , but is "abnormal" at the time t _s2 . The output by the first and second sense signals associated with the failure detection signal information determined to be abnormal is treated as a "result at the time of abnormality". Therefore, for example, when the sensor apparatus shown in this embodiment is used for control of an automobile, the first and second sense signals at the time t _s2 determined as "the result of abnormality" are not used for control, or the like. The determination is made by the control unit (not shown) of the vehicle. By this determination, it is possible to suppress the occurrence of malfunction of the vehicle itself due to controlling the vehicle based on the first and second sense signals at the time t _s2 .

With such a configuration, the failure detection signal corresponding to the sense signal one-to-one can be output from the output terminal 30 of the output circuit unit 19 without providing an output terminal in the failure diagnosis circuit 16. As a result, the sensor device can be miniaturized.

Moreover, also in this embodiment, it is good also as a structure which makes one detection element one, and provides only one drive circuit part, a detection circuit part, and a processing circuit part as a circuit structure corresponding to this.

For example, only the drive circuit portion 11A, the detection circuit portion 113A, and the processing circuit portion 114A are provided. In this case, the output circuit unit 19 digitally outputs the failure detection signal from the failure diagnosis circuit 16 and the sense signal from the processing circuit unit 114A at the same time as this failure detection signal. As a result, it is possible to determine whether the sense signal is a result of normal time or an abnormal time.

Moreover, also in this embodiment, the fault diagnosis circuit 16 may consist of a some fault diagnosis circuit. Each of the plurality of fault diagnosis circuits may be electrically connected to at least one of the driving circuit sections 11A and 11B, the detection circuit sections 113A and 113B, and the processing circuit sections 114A and 114B. In this case, the output circuit unit digitally outputs the plurality of failure detection signals from the plurality of failure diagnosis circuits and the sense signals from the processing circuit units 114A and 114B in a time division manner. Such a configuration is also possible. This configuration will be described with reference to FIG. 7. 7 is a block diagram of another sensor device according to Embodiment 2 of the present invention.

In this configuration example, instead of the failure diagnosis circuit 16, the first failure diagnosis circuit 16A and the second failure diagnosis circuit 16B (hereinafter, both failure diagnosis circuits) are provided. They are electrically connected to the output circuit section 20. The failure diagnosis circuit 16A is electrically connected to the detection circuit sections 113A and 113B, and the failure diagnosis circuit 16B is electrically connected to the drive circuit sections 11A and 11B.

In such a configuration, the output signal from the output circuit section 20 is as shown in FIG. In other words, the first and second sense signals output from the processing circuit units 114A and 114B are changing with time. Similarly, the first failure detection signal output from the failure diagnosis circuit 16A electrically connected to the detection circuit sections 113A and 113B is also changing with time. The second failure detection signal output from the failure diagnosis circuit 16B electrically connected to the drive circuit portions 11A and 11B is also changing with time. The first and second sense signals and the first and second failure detection signals are input to the output circuit unit 20. The output circuit unit 20 digitally outputs, in time division, the information of the first and second sense signals and the information of the first and second failure detection signals corresponding thereto at each timing.

In the example shown in FIG. 8, the determination by the failure detection signal is "normal" at the time t _s1. At the time t _s2 , the first failure detection signal is normal but the second failure detection signal is abnormal. Therefore, the judgment of "abnormal" is made as a whole, and the output by the 1st, 2nd sense signal matched with the 2nd failure detection signal information determined as this abnormality is handled as a "result at the time of abnormality."

Therefore, for example, when the sensor apparatus shown in this embodiment is used for control of an automobile, the first and second sense signals at the time t _s2 determined as "the result of abnormality" are not used for control, or the like. The determination is made by the control unit (not shown) of the vehicle. By this determination, it is possible to suppress the occurrence of malfunction of the vehicle itself due to controlling the vehicle based on the first and second sense signals at the time t _s2 .

With such a configuration, it is possible to output the failure detection signal corresponding to the sense signal one-to-one from the output terminal 30 of the output circuit unit 20 without providing an output terminal in the failure diagnosis circuits 16A and 16B. . As a result, the sensor device can be miniaturized.

Further, even when a plurality of fault diagnosis circuits 16A and 16B are used, the number of output terminals 30 does not increase in proportion to the number of fault diagnosis circuits. As a result, the sensor device can be miniaturized. In addition, the use of the plurality of failure diagnosis circuits 16A and 16B increases the number of failure diagnosis sections, further improving reliability.

In addition, a plurality of failure diagnosis circuits may be provided for a configuration in which only one detection element is provided, and only one driving circuit section, one detection circuit section, and one processing circuit section are provided. For example, in the structure shown in FIG. 7, the 2nd control circuit 51B and the acceleration detection element 12B are removed, and the fault diagnosis circuit 16A is driven to the detection circuit part 113A, and the fault diagnosis circuit 16B is driven. You may connect to the circuit part 11A, respectively.

In this case, the detection circuit section 113A is the first failure diagnosis section, and the drive circuit section 11A is the second failure diagnosis section. The failure diagnosis circuit 16A determines whether the detection circuit portion 113A is normal or abnormal, and outputs a first failure detection signal based on the determination result. On the other hand, the failure diagnosis circuit 16B determines whether the drive circuit portion 11A is normal or abnormal, and outputs a second failure detection signal based on the determination result. The output circuit unit 20 time-divisions the first failure detection signal from the failure diagnosis circuit 16A, the second failure detection signal from the failure diagnosis circuit 16B, and the first sense signal from the processing circuit unit 114A. Digital output. Thus, by providing the fault diagnosis circuits corresponding to two or more of the circuit parts which comprise the 1st control circuit 51A separately, the reliability of fault diagnosis further improves.

In addition, in the present embodiment, like the first embodiment, the viewpoint information does not need to be added to the response signal or the like. Thus, as shown in Figs. 6 and 8, the sense signal may not be a digital signal. That is, the fault diagnosis unit may be the driving circuit units 11A and 11B in addition to the detection circuit units 113A and 113B and the processing circuit units 114A and 114B. Moreover, these circuit parts may be analog circuits. The output circuits 19 and 20 that output signals in a time division manner to the outside may be digital circuits.

The sensor device of the present invention has the effect of improving the reliability and is useful in various electronic devices such as digital cameras and car navigation systems and automobiles.

Claims (8)

delete delete delete delete A first driving circuit unit for outputting a first driving signal; A first detecting element to which the first driving signal from the driving circuit portion is input; A first detection circuit portion for taking out a response signal from the first detection element; A first processing circuit section for extracting a first sense signal from the response signal from the detection circuit section; The at least one of the first drive circuit portion, the first detection circuit portion, and the first processing circuit portion is electrically connected to the first failure diagnosis portion using a first failure diagnosis portion to diagnose the first failure diagnosis. A first failure diagnosis circuit which determines whether the addition is normal or abnormal and outputs a first failure detection signal based on the determination result; The first failure detection signal from the first failure diagnosis circuit and the first point at the same time as the first failure detection signal so as to determine whether the first sense signal is a result of a normal time or an abnormal time. 1. A sensor device comprising an output circuit section for digitally outputting the first sense signal from the processing circuit section in a time division manner. The method according to claim 5, At least one of the first drive circuit portion, the first detection circuit portion, and the first processing circuit portion is a second failure diagnosis portion, and is electrically connected to the second failure diagnosis portion to diagnose the second failure diagnosis. And a second failure diagnosis circuit for determining whether the addition is normal or abnormal and outputting a second failure detection signal based on the determination result. The output circuit unit is configured to receive the first failure detection signal from the first failure diagnosis circuit, the second failure detection signal from the second failure diagnosis circuit, and the first sense signal from the first processing circuit part. A sensor device for digitally outputting in a time division manner. The method according to claim 5, A second driving circuit unit for outputting a second driving signal; A second detecting element to which the second driving signal from the second driving circuit portion is input; A second detection circuit section for taking out a second response signal from the second detection element; A second processing circuit portion for inputting the second response signal from the second detection circuit portion and extracting a second sense signal from the second response signal; The at least one of the second drive circuit portion, the second detection circuit portion, and the second processing circuit portion is electrically connected to the second failure diagnosis portion using a second failure diagnosis portion to diagnose the second failure diagnosis. And a second failure diagnosis circuit for determining whether the addition is normal or abnormal and outputting a second failure detection signal based on the determination result. The output circuit section includes the first failure detection signal from the first failure diagnosis circuit, the second failure detection signal from the second failure diagnosis circuit, and the first from the first and second processing circuit sections. And digitally output the second sense signal in a time division manner. A first driving circuit unit for outputting a first driving signal; A first detecting element to which the first driving signal from the driving circuit portion is input; A first detection circuit portion for taking out a response signal from the first detection element; A first processing circuit section for extracting a first sense signal from the response signal from the detection circuit section; A second driving circuit unit for outputting a second driving signal; A second detecting element to which the second driving signal from the second driving circuit portion is input; A second detection circuit section for taking out a second response signal from the second detection element; A second processing circuit portion for inputting the second response signal from the second detection circuit portion and extracting a second sense signal from the second response signal; At least one of the first driving circuit unit, the first detection circuit unit, and the first processing circuit unit is a first failure diagnosis unit, and among the second driving circuit unit, the second detection circuit unit, and the second processing circuit unit. At least one of the first and second diagnostic parts is electrically connected to the first and second diagnostic parts, and the second and second diagnostic parts are normally connected. A failure diagnosis circuit for determining whether at least one of the first failure diagnosis unit and the second failure diagnosis unit is abnormal, and outputting a failure detection signal based on the determination result; The first and second sense signals from the fault diagnosis circuit and the first and second points at the same time as the fault detection signal so as to determine whether the first and second sense signals are a result of a normal state or an abnormal state. And an output circuit section for digitally outputting the first and second sense signals from the second processing circuit section in a time division manner.

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