JP4239577B2 - Atmospheric pressure sensor abnormality detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an atmospheric pressure sensor abnormality detection device that detects an abnormality of an atmospheric pressure sensor mounted on a vehicle.
[0002]
[Prior art]
In the engine control of a vehicle equipped with an electronically controlled fuel injection device, the fuel injection time is calculated by measuring the amount of intake air by an air flow sensor or the like, and further the fuel injection time by the atmospheric pressure detected by the atmospheric pressure sensor. Is corrected. Therefore, if there is an abnormality in the atmospheric pressure sensor and the atmospheric pressure is not normally detected, the engine cannot be controlled normally. Therefore, it is necessary to accurately detect the abnormality in the atmospheric pressure sensor. As a diagnostic device for detecting an abnormality of a pressure sensor, a pressure sensor (intake pipe pressure sensor) is obtained by comparing an actually measured pressure measured by a pressure sensor with an estimated intake pipe pressure equivalent value estimated based on a cylinder air flow rate or the like. Japanese Laid-Open Patent Publication No. 2001-159574 (Patent Document 1) discloses a diagnostic apparatus for detecting such abnormalities.
[0003]
[Patent Document 1]
JP 2001-159574 A
[0004]
[Problems to be solved by the invention]
However, in the above diagnostic device, complicated processing is required to calculate the estimated pressure equivalent value. Since the error of the estimated intake pipe pressure equivalent value also becomes large, it was not possible to detect the sensor abnormality very accurately even by comparison with the actual measurement value of the pressure sensor.
[0005]
Accordingly, the present invention provides an atmospheric pressure sensor abnormality detection device that solves the above-described problems, calculates an estimated pressure value to be compared with an actual pressure value by a simple method, and can accurately detect an abnormality in the atmospheric pressure sensor. With the goal.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the atmospheric pressure sensor abnormality detection device of the present invention detects actual atmospheric pressure by an atmospheric pressure sensor and detects actual atmospheric pressure, and present location information based on radio waves received from a satellite. An estimated atmospheric pressure calculating means for calculating an altitude of the current location from the current location information and pre-stored map information, and calculating an estimated atmospheric pressure corresponding to the altitude of the current location; The current atmospheric pressure detected by the actual atmospheric pressure detection means Measured atmospheric pressure and Calculated by the estimated atmospheric pressure calculation means By comparing the estimated atmospheric pressure At present Judgment means for judging the presence or absence of abnormality of the atmospheric pressure sensor. According to the above atmospheric pressure sensor abnormality detection device, the estimated atmospheric pressure to be compared with the actually measured atmospheric pressure is calculated from the altitude of the current location. Therefore, complicated calculation is not required and an estimated atmospheric pressure with a small error can be obtained.
[0007]
Further, in the atmospheric pressure sensor abnormality detection device of the present invention, the judging means is: At the present time Measured atmospheric pressure and At the present time It is the difference from the estimated atmospheric pressure At the present time When the atmospheric pressure deviation is not in the range between the predetermined deviation upper limit value and the predetermined deviation lower limit value, it may be determined that the atmospheric pressure sensor is abnormal. According to the above atmospheric pressure sensor abnormality detection device, in the comparison between the measured atmospheric pressure and the estimated atmospheric pressure, the upper and lower limits of the difference between the two are set. Can judge abnormalities.
[0008]
Further, in the atmospheric pressure sensor abnormality detection device of the present invention, the judging means is: At the present time Measured atmospheric pressure and At the present time It is the difference from the estimated atmospheric pressure At the present time The atmospheric pressure deviation is not in the range between the predetermined deviation upper limit value and the predetermined deviation lower limit value. Judgment more than twice consecutively If it is determined, it may be characterized that it is determined that the atmospheric pressure sensor is abnormal. According to the above atmospheric pressure sensor abnormality detection device, in comparison between the measured atmospheric pressure and the estimated atmospheric pressure, it is determined that there is an abnormality in the atmospheric pressure sensor only when the difference between the two is not within the normal range for two or more consecutive times. Therefore, even if the atmospheric pressure change due to weather conditions exceeds the planned value in the first determination, it is not immediately determined that the atmospheric pressure sensor is abnormal, and the measurement is performed one more time. Thus, the abnormality of the atmospheric pressure sensor can be detected more accurately.
[0009]
Further, the atmospheric pressure sensor abnormality detection device of the present invention calculates actual location information based on radio pressure received from a satellite, and actual location information detecting means for detecting the actual atmospheric pressure by detecting the atmospheric pressure by the atmospheric pressure sensor. An estimated atmospheric pressure calculating means for calculating an altitude of the current location from map information stored in advance and calculating an estimated atmospheric pressure that is an atmospheric pressure corresponding to the altitude of the current location; The first measured atmospheric pressure at the first time point detected at the first point by the measured atmospheric pressure detecting means and the second measured atmospheric pressure at the second time point detected at the second point by the measured atmospheric pressure detecting means. When, A measured atmospheric pressure change amount calculating means for calculating a measured atmospheric pressure change amount which is a difference between The first estimated atmospheric pressure at the first time calculated at the first point by the estimated atmospheric pressure calculating means and the second estimated atmospheric pressure at the second time calculated at the second point by the estimated atmospheric pressure calculating means. When, An estimated atmospheric pressure change amount calculating means for calculating an estimated atmospheric pressure change amount that is a difference between the measured atmospheric pressure change amount and an estimated atmospheric pressure change amount by comparing the measured atmospheric pressure change amount with the estimated atmospheric pressure change amount. And.
[0010]
According to the above atmospheric pressure sensor abnormality detection device, the measured atmospheric pressure and the estimated atmospheric pressure are calculated at two points, the first point and the second point, and the amount of change between the first point and the second point is calculated. Since the atmospheric pressure sensor abnormality is determined by comparison, the atmospheric pressure difference due to weather conditions can be offset and compared, so that the influence of the weather and the like can be reduced and the abnormality of the atmospheric pressure sensor can be accurately detected.
[0011]
Further, the atmospheric pressure sensor abnormality detection device of the present invention calculates actual location information based on radio pressure received from a satellite, and actual location information detecting means for detecting the actual atmospheric pressure by detecting the atmospheric pressure by the atmospheric pressure sensor. The altitude atmospheric pressure calculation means for calculating the altitude atmospheric pressure, which is the atmospheric pressure corresponding to the altitude of the current location, is calculated from the map information stored in advance, and the atmospheric pressure information of the current location is obtained from the outside. Estimated atmospheric pressure calculating means for calculating an estimated atmospheric pressure that is an atmospheric pressure based on the atmospheric pressure information and the altitude atmospheric pressure; The current atmospheric pressure detected by the actual atmospheric pressure detection means Measured atmospheric pressure and Calculated by the estimated atmospheric pressure calculation means By comparing the estimated atmospheric pressure At present Judgment means for judging the presence or absence of abnormality of the atmospheric pressure sensor. According to the above atmospheric pressure sensor abnormality detection device, in comparison between the measured atmospheric pressure and the estimated atmospheric pressure, the estimated atmospheric pressure is a value that takes into account not only the altitude of the current location but also the atmospheric pressure based on the current weather conditions obtained from the outside. Therefore, the abnormality of the atmospheric pressure sensor can be detected more accurately.
[0012]
Further, the atmospheric pressure sensor abnormality detection device of the present invention calculates actual location information based on radio pressure received from a satellite, and actual location information detecting means for detecting the actual atmospheric pressure by detecting the atmospheric pressure by the atmospheric pressure sensor. The altitude corresponding to the altitude of the current location is calculated by calculating the altitude of the current location from map information stored in advance. Altitude atmospheric pressure Calculate Altitude atmospheric pressure calculation means And estimated atmospheric pressure calculating means for obtaining atmospheric pressure information of the current location from the outside and calculating an estimated atmospheric pressure that is an atmospheric pressure based on the obtained atmospheric pressure information and the altitude atmospheric pressure, The first measured atmospheric pressure at the first time point detected at the first point by the measured atmospheric pressure detecting means and the second measured atmospheric pressure at the second time point detected at the second point by the measured atmospheric pressure detecting means. When, A measured atmospheric pressure change amount calculating means for calculating a measured atmospheric pressure change amount which is a difference between The first estimated atmospheric pressure at the first time calculated at the first point by the estimated atmospheric pressure calculating means and the second estimated atmospheric pressure at the second time calculated at the second point by the estimated atmospheric pressure calculating means. When, An estimated atmospheric pressure change amount calculating means for calculating an estimated atmospheric pressure change amount that is a difference between the measured atmospheric pressure change amount and an estimated atmospheric pressure change amount by comparing the measured atmospheric pressure change amount with the estimated atmospheric pressure change amount. And. According to the above atmospheric pressure sensor abnormality detection device, the measured atmospheric pressure and the estimated atmospheric pressure are calculated at two points, the first point and the second point, and the amount of change between the first point and the second point is calculated. Since the atmospheric pressure sensor abnormality is determined by comparison, abnormality of the atmospheric pressure sensor can be detected more accurately.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. In addition, the same code | symbol is used for the same element and the overlapping description is abbreviate | omitted.
[0017]
FIG. 1 shows the configuration of the atmospheric pressure sensor abnormality detection device of the first embodiment. The atmospheric pressure sensor abnormality detection device 1 of the present embodiment is for detecting an abnormality of the atmospheric pressure sensor 3 mounted on the vehicle, and detects the atmospheric pressure and obtains atmospheric pressure information of the current location, The system includes a GPS system 5 for obtaining information on the current location of the vehicle and an ECU (Electric Control Unit) 7 for controlling the entire atmospheric pressure sensor abnormality detection device. The GPS system 5 and the atmospheric pressure sensor 3 are connected to the ECU 7, respectively. Has been. The GPS system 5 includes a GPS antenna 5a for receiving radio waves from GPS satellites, a GPS system main body 5b for calculating vehicle current position coordinates from the received radio waves, and a map information storage device 5c for storing map information. Yes.
[0018]
Map information is stored in the map information storage device 5c. The map information is information in which the plane coordinates of a predetermined range of points and the altitude of the point are stored in correspondence with each other, and the altitude of the point of a certain plane coordinate can be referred to. The GPS system main body 5b calculates the plane coordinates of the current location of the vehicle from the radio waves received by the GPS antenna 5a, and obtains the elevation of the current location by referring to the obtained plane coordinates of the current location and the map information read from the map information storage device 5c. The current altitude data can be sent to the ECU 7 after calculation. Although the GPS system can directly obtain the vertical coordinate data from the received radio wave information and directly calculate the altitude, the atmospheric pressure sensor abnormality detection device according to the present embodiment is a vehicle having no three-dimensional movement unlike an aircraft or the like. It is possible to know the altitude of the current location by the method as described above.
[0019]
The ECU 7 obtains the current altitude data from the GPS system 5 and calculates the atmospheric pressure (estimated atmospheric pressure) corresponding to the current altitude. The ECU 7 stores a table associating the altitude with the atmospheric pressure, and obtains the atmospheric pressure with reference to this table. Further, the ECU 7 can obtain current atmospheric pressure data (actually measured atmospheric pressure) from the atmospheric pressure sensor 3. Further, the ECU 7 determines whether or not there is an abnormality in the atmospheric pressure sensor 3 by comparing the obtained actual atmospheric pressure and the estimated atmospheric pressure.
[0020]
An abnormality detection process of the atmospheric pressure sensor abnormality detection device according to the present embodiment will be described. First, the process in which the GPS system 5 calculates the current altitude (h) will be described with reference to FIG. First, the GPS antenna 5b receives a plurality of radio waves transmitted from GPS satellites (S12). The GPS body 5a calculates the plane coordinates (x, y) of the current location based on the information included in the received radio wave (S14). As shown in FIG. 3, the GPS main unit 5a calculates the altitude h of the current location with reference to the map information 6 stored in the map information storage device 5c for the point corresponding to the obtained plane coordinates (x, y) of the current location. (S16).
[0021]
Next, an abnormality detection process of the atmospheric pressure sensor will be described with reference to FIG. The ECU 7 reads the value (Pa_s) of the actually measured atmospheric pressure detected by the atmospheric pressure sensor 3 (S102). Next, the ECU 7 reads the current altitude (h) calculated by the processing of the GPS system 5 (S104). Based on the read current altitude, an estimated atmospheric pressure (Pa_n) estimated from the current altitude is obtained as the current atmospheric pressure by referring to the altitude / atmospheric pressure table stored in the ECU 7 (S106). Here, the altitude / atmospheric pressure table is a table representing the relationship between altitude and atmospheric pressure under standard weather conditions. The atmospheric pressure deviation (ΔPa) is obtained by subtracting the estimated atmospheric pressure from the actual atmospheric pressure obtained above (S108). That is, the atmospheric pressure deviation ΔPa is a negative value when the measured atmospheric pressure is lower than the estimated atmospheric pressure, and is a positive value when the measured atmospheric pressure is opposite (ΔPa = Pa_s−Pa_n).
[0022]
Regarding the atmospheric pressure deviation ΔPa obtained above, a range assumed as a deviation is preset, and the atmospheric pressure deviation ΔPa is a range between a preset deviation upper limit value ΔPa_max and deviation lower limit value ΔPa_min (ΔPa_min <ΔPa <ΔPa_max ) Is set as a range in which the atmospheric pressure sensor is determined to be normal (hereinafter referred to as “normal range”). It is determined whether or not ΔPa is in the range of ΔPa_min <ΔPa <ΔPa_max (S110). If it is not within the range, it is determined that the atmospheric pressure sensor is abnormal (S114). Here, the deviation upper limit value ΔPa_max and the deviation lower limit value ΔPa_min will be described. Estimated atmospheric pressure is estimated under the assumption of standard weather conditions, so the measured atmospheric pressure is normal even when the atmospheric pressure sensor is normal at high and low pressures far from standard weather conditions. And the difference becomes larger. For example, in the case of an extremely low atmospheric pressure such as when a typhoon is approaching, the measured atmospheric pressure is significantly lower than the estimated atmospheric pressure, and ΔPa_n (having a negative value) becomes small. In this case, the deviation upper limit value ΔPa_max is set based on the maximum high pressure assumed based on past weather data, etc., and the deviation lower limit value ΔPa_min is a low It is set considering the atmospheric pressure of the hour. Furthermore, in consideration of errors of the atmospheric pressure sensor 3 and the GPS system 5, etc., appropriate values are set in advance.
[0023]
For example, referring to past meteorological data, the actual atmospheric pressure at high pressure may exceed the estimated atmospheric pressure by up to p hectopascals, and the measured atmospheric pressure at low pressure may be up to q hectopascals above the estimated atmospheric pressure. If there is a possibility of lowering, the deviation upper limit value ΔPa_max = p (hectopascal) and the deviation lower limit value ΔPa_min = −q (hectopascal) may be set.
[0024]
If it is determined in S110 that ΔPa is within the normal range, it is determined that the atmospheric pressure sensor is normal (S112), and the process ends. When it is determined in S110 that the atmospheric pressure sensor is abnormal (S114), a warning is issued to the user (S116), and an action for abnormal atmospheric pressure sensor is urged.
[0025]
According to the above atmospheric pressure sensor abnormality detection device, the deviation upper limit value and the deviation lower limit value that are the upper limit of the normal range are set in consideration of the influence of the weather conditions in the determination of the atmospheric pressure deviation ΔPa. Even when the atmospheric pressure deviation increases or decreases due to low atmospheric pressure, it is not determined that the atmospheric pressure sensor is abnormal. Therefore, the atmospheric pressure sensor abnormality determination can be performed more accurately than the determination method of allowing an error from the estimated atmospheric pressure to plus or minus ○ hectopascals. In addition, since the deviation upper limit value and deviation lower limit value are set separately, even if the atmospheric pressure deviation is a positive number (high pressure) and a negative number (low pressure), the allowable limit is different. Correspondence becomes possible. For example, even when the difference between the measured atmospheric pressure and the estimated atmospheric pressure tends to be larger on the low pressure side than on the high pressure side, appropriate values can be set for both the deviation upper limit value and the deviation lower limit value. .
[0026]
In the above atmospheric pressure sensor abnormality detection device, the atmospheric pressure sensor abnormality is determined by determining whether or not the atmospheric pressure deviation ΔPa is in the normal range only once, but as in the atmospheric pressure sensor abnormality detection device shown in FIG. It may be determined that the atmospheric pressure sensor is abnormal only when it is out of the normal range twice in succession. The processing in S102 to S110 in FIG. 5 is the same as the processing in S102 to S110 in FIG. According to the atmospheric pressure sensor abnormality detection device shown in FIG. 5, even if ΔPa is determined not to be in the normal range in S110, if it is determined that it is not in the normal range for the first time. It is not determined that the atmospheric pressure sensor is abnormal. Specifically, it is determined whether or not the trip counter is 0 in S120. Here, the trip counter is a flag on the processing program indicating whether or not a temporary abnormality was determined when the atmospheric pressure abnormality sensor abnormality detection process was performed last time. The trip counter always takes a value of 1 or 0. It is like that. When the trip counter = 0, the atmospheric pressure sensor abnormality estimation is the first time, so a temporary abnormality determination is made (S122), the value of ΔPa is stored as ΔPa_x (S124), and the trip counter = 1 is set (S126). finish. If the trip counter = 1 in S120, the atmospheric pressure sensor abnormality estimation is the second time, so it is determined that the atmospheric pressure sensor is abnormal (S128), a warning is issued to the user (S130), and the trip counter is reset to 0. (S132) and the process ends.
[0027]
If ΔPa is determined to be within the normal range in S110, it is determined that the atmospheric pressure sensor is normal (S112), and it is determined whether trip counter = 1 or 0 (S140). The trip counter = 1 is a case where a temporary abnormality determination is made in the previous atmospheric pressure sensor abnormality detection process (S122) and the previous ΔPa value is already stored as ΔPa_x (S124). In this case, it is determined whether the stored ΔPa_x is ΔPa_x> ΔPa_max or ΔPa_x <ΔPa_min (S142). When ΔPa_x> ΔPa_max, the value of ΔPa_x is updated as a new ΔPa_max (S144), and when ΔPa_x <ΔPa_min, the value of ΔPa_x is updated as a new ΔPa_min (S146). Then, the trip counter is reset to 0 (S148), and the process is terminated. If the trip counter = 0 in S140, the process ends.
[0028]
According to this atmospheric pressure sensor abnormality detection device, even if the atmospheric pressure deviation ΔPa exceeds the normal range due to high pressure or low pressure exceeding the range of the assumed weather conditions, the atmospheric pressure sensor is uniform. It can prevent being determined as abnormal. Further, when ΔPa exceeds the normal range twice in succession, it is determined that the atmospheric pressure sensor is abnormal, so that it is possible to prevent overlooking the true atmospheric pressure sensor abnormality. In addition, the deviation upper limit value ΔPa_max and deviation lower limit value ΔPa_min are automatically updated when placed in an environment of high or low pressure exceeding the range of currently assumed weather conditions. The latest data can be kept up to date.
[0029]
Next, a second embodiment of the atmospheric pressure sensor abnormality detection device of the present invention will be described. The atmospheric pressure sensor abnormality detection device of the present embodiment is composed of the atmospheric pressure sensor 3, the GPS system 5, and the ECU 7 as in the first embodiment, and the configuration of each device is the same as in the first embodiment. Description is omitted.
[0030]
An abnormality detection process of the atmospheric pressure sensor abnormality detection device according to the present embodiment will be described. As shown in FIG. 6, in the abnormality detection device of the present embodiment, the measured atmospheric pressure Pa_s and the estimated atmospheric pressure Pa_n are calculated at two points at different altitudes while the vehicle is moving. The change amount ΔPa_n of the atmospheric pressure Pa_n is compared to determine whether the atmospheric pressure sensor is abnormal. Hereinafter, the abnormality detection process will be described with reference to FIG. 7. First, the ECU 7 determines the first measured atmospheric pressure Pa_s1 (S202) and the first estimated atmospheric pressure Pa_n1 (S204) at the first moving point in the first embodiment. It is calculated by the same process. Further, after moving to the second point, the second measured atmospheric pressure Pa_s2 (S206) and the second estimated atmospheric pressure Pa_n2 (S208) are calculated by the same process. A large difference in elevation between the first point and the second point is desirable for improving the accuracy of abnormality detection.
[0031]
The actual atmospheric pressure change ΔPa_s (ΔPa_s = Pa_s2−Pa_s1), which is the difference between the first actual atmospheric pressure Pa_s1 and the second actual atmospheric pressure Pa_s2 measured above, is calculated (S210). Next, an actual atmospheric pressure change amount ΔPa_n (ΔPa_n = Pa_n2−Pa_n1), which is a difference between the measured first estimated atmospheric pressure Pa_n1 and the second estimated atmospheric pressure Pa_n2, is calculated (S212). The absolute value (| ΔPa_s−ΔPa_n |) of the difference between the calculated actual atmospheric pressure change amount and the estimated atmospheric pressure change amount is calculated, and the magnitude compared with the predetermined value is determined (S214). If it is larger than the predetermined value, it is determined that the atmospheric pressure sensor is abnormal (S218), a warning is issued to the user (S220), and a measure for abnormal atmospheric pressure sensor is urged to end the process. In other cases, it is determined that the atmospheric pressure sensor is normal (S222), and the process is terminated.
[0032]
The measured atmospheric pressure ΔPa_s is the estimated atmospheric pressure ΔPa_n estimated based on the current altitude, plus the atmospheric pressure difference Δp due to weather conditions, that is, if the atmospheric pressure sensor is normal
ΔPa_s = ΔPa_n + Δp + δ (1)
Can be considered to hold. Here, δ represents a measurement error. Since the atmospheric pressure difference Δp due to weather conditions hardly changes depending on the distance and time the vehicle has moved, it can be considered to be the same at the first and second points. Therefore, when the formula (1) is applied at the first point and the second point, the following formulas (2) and (3) are obtained.
ΔPa_s1 = ΔPa_n1 + Δp + δ1 (2)
ΔPa_s2 = ΔPa_n2 + Δp + δ2 (3)
[0033]
If (3)-(2) is calculated here, Δp is erased,
ΔPa_s2−ΔPa_s1 = ΔPa_n2−ΔPa_n1 + δ2−δ1 (4)
Since ΔPa_s2−ΔPa_s1 = ΔPa_s, ΔPa_n2−ΔPa_n1 = ΔPa_n2
ΔPa_s−ΔPa_n = δ (5)
Where δ = δ2−δ1. As a result, if (5) is satisfied, it can be determined that the atmospheric pressure sensor is normal, and if it is not satisfied, it is determined to be abnormal. Therefore, taking measurement errors into account
When | ΔPa_s−ΔPa_n | is larger than a predetermined value, it can be determined that the atmospheric pressure sensor is normal, and otherwise it is abnormal.
[0034]
According to the atmospheric pressure sensor abnormality detection device, the abnormality of the atmospheric pressure sensor is determined by comparing the measured atmospheric pressure change amount with the estimated atmospheric pressure change amount. Therefore, it is possible to detect an abnormality in the atmospheric pressure sensor with higher accuracy than in determining by directly comparing the measured atmospheric pressure and the estimated atmospheric pressure. In addition, as described above, the normality / abnormality of the atmospheric pressure sensor is determined based on the magnitude of | ΔPa_s−ΔPa_n |. However, since Δp is not included in | ΔPa_s−ΔPa_n | The normality / abnormality of the atmospheric pressure sensor can be determined without considering the difference (Δp). Therefore, it is possible to accurately detect an abnormality in the atmospheric pressure sensor regardless of weather conditions.
[0035]
Next, a third embodiment of the atmospheric pressure sensor abnormality detection device of the present invention will be described. The atmospheric pressure sensor abnormality detection device of the present embodiment is configured by the atmospheric pressure sensor 3, the GPS system 5, and the ECU 7 as in the first embodiment, and the configurations of the atmospheric pressure sensor 3 and the ECU 7 are the same as in the first embodiment. Therefore, explanation is omitted.
[0036]
As shown in FIG. 8, the GPS system 5 constituting the atmospheric pressure sensor abnormality detection device of the present embodiment includes a GPS antenna 5a, a GPS system main body 5b, a map information storage device 5c, and a weather information acquisition device 5d. The configurations and functions of the GPS antenna 5a, the GPS system main body 5b, and the map information storage device 5c are the same as those of the GPS system according to the first embodiment. The meteorological information acquisition device 5d can receive meteorological information through a mobile phone line, for example, and can obtain information on the current atmospheric pressure at an altitude of 0 m at a point corresponding to the current location coordinates, for example. The information on the atmospheric pressure thus obtained can be sent to the ECU 7.
[0037]
The abnormality detection process of the atmospheric pressure sensor abnormality detection device according to the present embodiment will be described with reference to FIG. The ECU 7 reads the measured atmospheric pressure value (Pa_s) detected by the atmospheric pressure sensor 3 (S302). Next, the ECU 7 reads the current altitude (h) calculated by the processing of the GPS system 5 (S304). Based on the read current altitude, an altitude / atmospheric pressure table (Pa_h) estimated from the current altitude is obtained as an atmospheric pressure of the current position with reference to an altitude / atmospheric pressure table stored in the ECU 7 (S306). Here, the altitude / atmospheric pressure table is a table representing the relationship between altitude and atmospheric pressure under standard weather conditions. Next, the ECU 7 reads the atmospheric pressure (Pa_r) based on the weather information acquired by the GPS system 5 (S308).
[0038]
Next, the estimated atmospheric pressure Pa_n estimated from the altitude atmospheric pressure Pa_h and the atmospheric pressure Pa_r based on weather information is calculated (S310). First, an altitude / atmospheric pressure Pa_h0 at an altitude of 0 m is obtained with reference to the altitude / atmospheric pressure table. Since the difference (Pa_r−Pa_h0) between Pa_r and Pa_h0 is considered to be a pressure difference due to weather conditions, the estimated atmospheric pressure Pa_n is calculated by adding this pressure difference to the altitude atmospheric pressure Pa_h (Pa_n = Pa_h + Pa_r−Pa_h0). Next, an atmospheric pressure deviation (ΔPa) which is an absolute value of a difference between the actually measured atmospheric pressure and the estimated atmospheric pressure obtained above is obtained (S312). The atmospheric pressure deviation ΔPa is compared with a predetermined value (S314). If the atmospheric pressure deviation ΔPa is larger than the predetermined value, it is determined that the atmospheric pressure sensor is abnormal (S316), and a warning is given to the user. Is issued, and a measure for abnormal atmospheric pressure sensor is urged (S318), and the process is terminated. In other cases, it is determined that the atmospheric pressure sensor is normal (S320), and the process is terminated.
[0039]
According to the above atmospheric pressure sensor abnormality detection device, the estimated atmospheric pressure is obtained by adding the atmospheric pressure difference due to the weather condition to the altitude atmospheric pressure in the abnormality determination process. It will reflect the atmospheric pressure. For this reason, the estimated atmospheric pressure compared with the actually measured atmospheric pressure becomes a value obtained by more accurately estimating the atmospheric pressure, and the atmospheric pressure sensor abnormality can be detected with higher accuracy.
[0040]
Next, a fourth embodiment of the atmospheric pressure sensor abnormality detection device of the present invention will be described. The atmospheric pressure sensor abnormality detection device of the present embodiment is configured by the atmospheric pressure sensor 3, the GPS system 5, and the ECU 7 as in the third embodiment, and the configuration of each device is also the same as in the third embodiment. Description is omitted.
[0041]
The abnormality detection process of the atmospheric pressure sensor abnormality detection device according to the present embodiment will be described with reference to FIG. In the abnormality detection device of this embodiment, the actual atmospheric pressure and the estimated atmospheric pressure are calculated at two points at different altitudes while the vehicle is moving, and the abnormality of the atmospheric pressure sensor is determined based on the result. First, the ECU 7 calculates the first measured atmospheric pressure Pa_s1 (S402) and the first estimated atmospheric pressure Pa_n1 (S404) at the first moving point by the same process as in the third embodiment. Further, after moving to the second point, the second actually measured atmospheric pressure Pa_s2 (S406) and the second estimated atmospheric pressure Pa_n2 (S408) are calculated by the same processing as in the third embodiment. A large difference in elevation between the first point and the second point is desirable for improving the accuracy of abnormality detection.
[0042]
The actual atmospheric pressure change ΔPa_s (ΔPa_s = Pa_s2−Pa_s1), which is the difference between the first actual atmospheric pressure Pa_s1 and the second actual atmospheric pressure Pa_s2 measured above, is calculated (S410). Next, an actual atmospheric pressure change ΔPa_n (ΔPa_n = Pa_n2−Pa_n1) that is a difference between the first estimated atmospheric pressure Pa_n1 and the second estimated atmospheric pressure Pa_n2 measured above is calculated (S412). The absolute value (| ΔPa_s−ΔPa_n |) of the difference between the calculated actual atmospheric pressure change amount and the estimated atmospheric pressure change amount is calculated and compared with a predetermined value (S414). If it is larger than the predetermined value, it is determined that the atmospheric pressure sensor is abnormal (S418), a warning is issued to the user (S420), and a measure for abnormal atmospheric pressure sensor is urged to end the process. Otherwise, it is determined that the atmospheric pressure sensor is normal (S422), and the process is terminated.
[0043]
According to the atmospheric pressure sensor abnormality detection device, the abnormality of the atmospheric pressure sensor is determined by comparing the measured atmospheric pressure change amount with the estimated atmospheric pressure change amount. Therefore, it is possible to detect an abnormality in the atmospheric pressure sensor with higher accuracy than in determining by directly comparing the measured atmospheric pressure and the estimated atmospheric pressure.
[0044]
Next, a fifth embodiment of the atmospheric pressure sensor abnormality detection device of the present invention will be described. As shown in FIG. 11, the atmospheric pressure sensor abnormality detection device of this embodiment includes an atmospheric pressure sensor 3, an air flow meter 9, a throttle sensor 11, an intake air temperature sensor 13, and an ECU 7. The atmospheric pressure sensor 3 senses atmospheric pressure, obtains atmospheric pressure information of the current location, and sends atmospheric pressure data to the ECU 7. The air flow meter 9 is installed in an intake pipe of an engine of a vehicle, senses the weight of intake air (intake air amount), and sends data to the ECU 7. The throttle sensor 11 senses the throttle valve angle (throttle opening) and sends data to the ECU 7. The intake air temperature sensor is installed in the intake pipe of the engine of the vehicle, detects the temperature of intake air (intake air temperature), and sends data to the ECU 7. The ECU 7 is responsible for controlling these devices as a whole. The ECU 7 stores a throttle opening / intake air amount table. The throttle opening / intake air amount table is a table showing the relationship between the throttle opening and the intake air amount at the intake air temperature under the standard atmospheric pressure.
[0045]
An abnormality detection process of the atmospheric pressure sensor abnormality detection device according to the present embodiment will be described. First, a process for obtaining the estimated atmospheric pressure from the intake air amount obtained by the air flow meter 9, the throttle opening degree obtained by the throttle sensor 11 and the intake air temperature obtained by the intake air temperature sensor 13 will be described. First, the ECU 7 reads the intake air amount (m) data from the air flow meter 9, the throttle opening (d) data from the throttle sensor 11, and the intake air temperature (T) data from the intake air temperature sensor. An intake air amount m0 obtained under the conditions of the throttle opening d and the intake air temperature T is obtained from the throttle opening / intake air amount table. That is, the intake air amount m0 means the intake air amount that is expected to be obtained under the conditions of the throttle opening d and the intake air temperature T under the standard atmospheric pressure Pa_0. The ECU 7 calculates the estimated atmospheric pressure Pa_n estimated as the actual atmospheric pressure by comparing the obtained intake air amount m0 and the intake air amount m obtained by the air flow meter 9. Since the atmospheric pressure and the intake air intake amount are considered to be proportional, the estimated atmospheric pressure Pa_n is calculated as Pa_n = Pa_0 · m / m0.
[0046]
Next, an abnormality detection process of the atmospheric pressure sensor will be described with reference to FIG. The ECU 7 reads the value (Pa_s) of the actually measured atmospheric pressure detected by the atmospheric pressure sensor 3 (S502). Further, the ECU 7 calculates the estimated atmospheric pressure Pa_n from the intake air amount, the throttle opening degree, and the intake air temperature in the above-described process (S506). The atmospheric pressure deviation (ΔPa) is obtained by subtracting the estimated atmospheric pressure from the actual atmospheric pressure obtained above (S508). That is, the atmospheric pressure deviation ΔPa is a negative value when the measured atmospheric pressure is lower than the estimated atmospheric pressure, and is a positive value when the measured atmospheric pressure is opposite (ΔPa = Pa_s−Pa_n).
[0047]
The obtained atmospheric pressure deviation ΔPa is compared with a predetermined deviation upper limit value ΔPa_max and a deviation lower limit value ΔPa_min (S510). If ΔPa does not fall within the normal range set as, it is determined that there is an abnormality in the atmospheric pressure sensor (S512). Here, the deviation upper limit value ΔPa_max and the deviation lower limit value ΔPa_min are set based on past weather data and the like, as in the first embodiment.
[0048]
If it is determined in S510 that the atmospheric pressure sensor is normal (S512), the process ends. If it is determined in S510 that the atmospheric pressure sensor is abnormal (S514), a warning is issued to the user (S516), and an action for abnormal atmospheric pressure sensor is urged.
[0049]
According to the atmospheric pressure sensor abnormality detection device, since the estimated atmospheric pressure is obtained from the data of the vehicle engine, a GPS system becomes unnecessary. In addition, since the upper limit of the deviation and the lower limit of the deviation that are the lower limit of the normal range are set in consideration of the influence of the weather conditions in the determination of the atmospheric pressure deviation ΔPa, the atmospheric pressure deviation is large due to the high and low pressures. Even if it becomes smaller or smaller, it is not determined that the atmospheric pressure sensor is abnormal. Therefore, the atmospheric pressure sensor abnormality determination can be performed more accurately than the determination method of allowing an error from the estimated atmospheric pressure to plus or minus ○ hectopascals. In addition, since the deviation upper limit value and deviation lower limit value are set separately, even if the atmospheric pressure deviation is a positive number (high pressure) and a negative number (low pressure), the allowable limit is different. Correspondence becomes possible. For example, even when the difference between the measured atmospheric pressure and the estimated atmospheric pressure tends to be larger on the low pressure side than on the high pressure side, appropriate values can be set for both the deviation upper limit value and the deviation lower limit value. .
[0050]
In the above atmospheric pressure sensor abnormality detection device, the atmospheric pressure sensor abnormality is determined only by determining once whether the atmospheric pressure deviation ΔPa is in the normal range, but as in the atmospheric pressure sensor abnormality detection device shown in FIG. It may be determined that the atmospheric pressure sensor is abnormal only when it is out of the normal range twice in succession. The processes in S501 to S510 in FIG. 13 are the same as the processes in S501 to S510 in FIG. According to the atmospheric pressure sensor abnormality detection device shown in FIG. 13, even if ΔPa is determined not to be in the normal range in S510, if it is determined that it is not in the normal range for the first time. It is not determined that the atmospheric pressure sensor is abnormal. Specifically, it is determined whether or not the trip counter is 0 in S520. Here, the trip counter is a flag on the processing program indicating whether or not a temporary abnormality was determined when the atmospheric pressure abnormality sensor abnormality detection process was performed last time. The trip counter always takes a value of 1 or 0. It is like that. When the trip counter = 0, the atmospheric pressure sensor abnormality estimation is the first time, so a temporary abnormality determination is made (S522), the value of ΔPa is stored as ΔPa_x (S524), and the trip counter = 1 is set (S526). finish. If the trip counter = 1 in S520, the atmospheric pressure sensor abnormality estimation is the second time, so it is determined that the atmospheric pressure sensor is abnormal (S528), a warning is issued to the user (S530), and the trip counter is returned to 0. (S532) and the process ends.
[0051]
If ΔPa is determined to be within the normal range in S510, it is determined that the atmospheric pressure sensor is normal (S512), it is determined whether trip counter = 1 or 0 (S540), and trip counter = 1. This is a case where a temporary abnormality determination is made in the previous atmospheric pressure sensor abnormality detection process (S522) and the previous ΔPa value is already stored as ΔPa_x (S524). In this case, it is determined whether the stored ΔPa_x is ΔPa_x> ΔPa_max or ΔPa_x <ΔPa_min (S542). When ΔPa_x> ΔPa_max, the value of ΔPa_x is updated as a new ΔPa_max (S544), and when ΔPa_x <ΔPa_min, the value of ΔPa_x is updated as a new ΔPa_min (S546). Then, the trip counter is reset to 0 (S548) and the process is terminated. If the trip counter = 0 in S540, the process ends.
[0052]
According to this atmospheric pressure sensor abnormality detection device, even if the atmospheric pressure deviation ΔPa exceeds the normal range due to high pressure or low pressure exceeding the range of the assumed weather conditions, the atmospheric pressure sensor is uniform. It can prevent being determined as abnormal. Further, when ΔPa exceeds the normal range twice consecutively, it is determined that the atmospheric pressure sensor is abnormal, so that it is possible to prevent overlooking even in the case of a true atmospheric pressure sensor abnormality. In addition, the deviation upper limit value ΔPa_max and deviation lower limit value ΔPa_min are automatically updated when placed in an environment of high or low pressure exceeding the range of currently assumed weather conditions. The latest data can be kept up to date.
[0053]
Next, a sixth embodiment of the atmospheric pressure sensor abnormality detection device of the present invention will be described. As shown in FIG. 14, the atmospheric pressure sensor abnormality detection device of the present embodiment includes an atmospheric pressure sensor 3, an engine output detection device 15, and a vehicle speed sensor 19. The atmospheric pressure sensor 3 senses atmospheric pressure and sends atmospheric pressure data to the ECU 7. The engine output detection device 15 calculates the output of the engine based on data such as a throttle sensor and sends the data to the ECU 7. The vehicle speed sensor 19 senses the speed of the vehicle and sends speed data to the ECU 7.
[0054]
Next, the atmospheric pressure sensor abnormality detection process will be described with reference to FIG. The ECU 7 reads the value (Pa_s1) of the actual atmospheric pressure detected by the atmospheric pressure sensor 3 at the first point, and sets it as the first actual atmospheric pressure (S602). Next, the EUC 7 reads engine output data from the engine output detector 15. In addition, the ECU reads the vehicle speed from the vehicle speed sensor 19 and calculates the vehicle acceleration based on the vehicle speed. The ECU obtains the gradient of the current location from the relationship between the read engine output and the calculated vehicle acceleration (S606). After moving to the second point, the ECU 7 reads the value (Pa_s2) of the measured atmospheric pressure detected by the atmospheric pressure sensor 3 and sets it as the second measured atmospheric pressure (S608). Then, an actual atmospheric pressure change ΔPa_s (ΔPa_s = Pa_s2−Pa_s1) that is a difference between the first actual atmospheric pressure Pa_s1 and the second actual atmospheric pressure Pa_s2 is calculated (S610). On the other hand, an estimated elevation change Δh, which is a change in elevation from the first point to the second point, is calculated based on the obtained slope and speed data (S611), and the estimated atmospheric pressure change ΔPa_n is calculated from the estimated elevation change. Obtain (S612). An absolute value (| ΔPa_s−ΔPa_n |) of the difference between the calculated actual atmospheric pressure change amount and the estimated atmospheric pressure change amount is calculated, and the magnitude of this value is compared with a predetermined value (S614). When | ΔPa_s−ΔPa_n | is larger than a predetermined value, it is determined that the atmospheric pressure sensor is abnormal (S618), a warning is issued to the user (S620), and a measure for abnormal atmospheric pressure sensor is urged to end the processing. To do. Otherwise, it is determined that the atmospheric pressure sensor is normal (S622), and the process is terminated.
[0055]
The comparison between the measured atmospheric pressure and the estimated atmospheric pressure or the comparison between the measured atmospheric pressure change amount and the estimated atmospheric pressure change amount in each of the above embodiments is a combination of any two or more comparisons, You can also Hereinafter, as an example, an atmospheric pressure sensor abnormality determination process performed by combining the comparison in the first embodiment and the comparison in the second embodiment will be described with reference to FIG.
[0056]
First, at the first point, the ECU 7 reads the value (Pa_s1) of the first actually measured atmospheric pressure detected by the atmospheric pressure sensor 3 (S702). Next, the ECU 7 reads the current altitude (h) calculated by the processing of the GPS system 5 (S704). An estimated atmospheric pressure (Pa_n) estimated from the current altitude is calculated based on the read current altitude (S706). The atmospheric pressure deviation (ΔPa) is obtained by subtracting the estimated atmospheric pressure from the measured atmospheric pressure obtained above (S708). That is, the atmospheric pressure deviation ΔPa is a negative value when the measured atmospheric pressure is lower than the estimated atmospheric pressure, and is a positive value when the measured atmospheric pressure is opposite (ΔPa = Pa_s−Pa_n).
[0057]
It is determined whether or not the atmospheric pressure deviation ΔPa is within a normal range (ΔPa_min <ΔPa <ΔPa_max) between a predetermined upper limit deviation ΔPa_max and a lower limit deviation ΔPa_min (S710). If it is within the normal range, it is determined that the atmospheric pressure sensor is normal (S712), and the process is terminated. If it is determined in S710 that ΔPa is not in the normal range, when the vehicle moves to the second point, the second actually measured atmospheric pressure (Pa_s2) and the second estimated atmospheric pressure are the same as the processing at the first point. (Pa_n2) is obtained (S716, S718). Further, the actual measured atmospheric pressure change ΔPa_s (ΔPa_s = Pa_s2-Pa_s1) and the actual measured atmospheric pressure change ΔPa_n (ΔPa_n = Pa_n2-Pa_n1) are calculated (S720, S722), and the calculated actual atmospheric pressure change and estimated atmospheric pressure change are calculated. The absolute value (| ΔPa_s−ΔPa_n |) of the difference from the quantity is calculated, and the magnitude compared with the predetermined value is determined (S724). If the absolute value is smaller than the predetermined value, it is determined that the atmospheric pressure sensor is normal (S726). Otherwise, it is determined that the atmospheric pressure sensor is abnormal (S728), and a warning is given to the user. The originating process (S730) is terminated.
[0058]
It is possible to detect an abnormality more accurately by judging an abnormality in the atmospheric pressure sensor by combining two or three or more processes for obtaining and comparing the estimated atmospheric pressure and the estimated atmospheric pressure change amount as described above. Become.
[0059]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an atmospheric pressure sensor abnormality detection device capable of calculating an estimated value of pressure to be compared with an actual pressure value by a simple method and accurately detecting abnormality of the atmospheric pressure sensor. it can.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an atmospheric pressure sensor abnormality detection device according to a first embodiment.
FIG. 2 is a flowchart of processing for calculating a current altitude.
FIG. 3 is an image diagram of processing for calculating a current altitude.
FIG. 4 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the first embodiment.
FIG. 5 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the first embodiment.
FIG. 6 is a diagram illustrating an atmospheric pressure sensor abnormality detection process of an atmospheric pressure sensor abnormality detection device according to a second embodiment.
FIG. 7 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the second embodiment.
FIG. 8 is a configuration diagram of an atmospheric pressure sensor abnormality detection device according to a third embodiment.
FIG. 9 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the third embodiment.
FIG. 10 is a flowchart of atmospheric pressure sensor abnormality detection processing of an atmospheric pressure sensor abnormality detection device according to a fourth embodiment.
FIG. 11 is a configuration diagram of an atmospheric pressure sensor abnormality detection device according to a fifth embodiment.
FIG. 12 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the fifth embodiment.
FIG. 13 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the fifth embodiment.
FIG. 14 is a configuration diagram of an atmospheric pressure sensor abnormality detection device according to a sixth embodiment.
FIG. 15 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device according to the sixth embodiment.
FIG. 16 is a flowchart of atmospheric pressure sensor abnormality detection processing of the atmospheric pressure sensor abnormality detection device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Atmospheric pressure sensor abnormality detection device, 3 ... Atmospheric pressure sensor, 5 ... GPS system, 6 ... Map information, 7 ... ECU, 9 ... Air flow meter, 11 ... Throttle sensor, 13 ... Intake air temperature sensor, 15 ... Engine output detection Device, 19 ... speed sensor.

Claims (6)

Measured atmospheric pressure detection means for detecting the atmospheric pressure by detecting the atmospheric pressure with an atmospheric pressure sensor,
Estimate that calculates current location information based on radio waves received from satellites, calculates an altitude of the current location from the current location information and previously stored map information, and calculates an estimated atmospheric pressure that is an atmospheric pressure corresponding to the altitude of the current location Atmospheric pressure calculating means;
By comparing the current measured atmospheric pressure detected by the actual measured atmospheric pressure detecting means with the current estimated atmospheric pressure calculated by the estimated atmospheric pressure calculating means, the abnormality of the atmospheric pressure sensor at the current time is compared. A determination means for determining presence or absence;
An atmospheric pressure sensor abnormality detection device comprising: The determination means includes
Atmospheric pressure deviation current which is a difference between the estimated atmospheric pressure of the moment and the actual atmospheric pressure of the present time, the large if not in the range between a predetermined upper limit value of the deviation with a predetermined deviation lower limit The atmospheric pressure sensor abnormality detection device according to claim 1, wherein the atmospheric pressure sensor is determined to be abnormal. The determination means includes
Atmospheric pressure deviation current which is a difference between the estimated atmospheric pressure of the moment and the actual atmospheric pressure of the present time, the determination in not in the range between a predetermined upper limit value of the deviation with a predetermined deviation lower limit 2 The atmospheric pressure sensor abnormality detection device according to claim 1, wherein the atmospheric pressure sensor abnormality is determined to be abnormal if the atmospheric pressure sensor is continuously performed more than once . Measured atmospheric pressure detection means for detecting the atmospheric pressure by detecting the atmospheric pressure with an atmospheric pressure sensor,
Estimate that calculates current location information based on radio waves received from satellites, calculates an altitude of the current location from the current location information and previously stored map information, and calculates an estimated atmospheric pressure that is an atmospheric pressure corresponding to the altitude of the current location Atmospheric pressure calculating means;
A first measured atmospheric pressure at a first time point detected at the first point by the actually measured atmospheric pressure detecting means, and a second actually measured pressure value at a second time point detected at the second point by the actually measured atmospheric pressure detecting means. and atmospheric pressure, and the measured atmospheric pressure change amount calculating means for calculating a measured atmospheric pressure variation which is a difference,
The first estimated atmospheric pressure at the first time point calculated at the first point by the estimated atmospheric pressure calculating unit and the second time point calculated at the second point by the estimated atmospheric pressure calculating unit. Estimated atmospheric pressure change amount calculating means for calculating an estimated atmospheric pressure change amount that is a difference between the second estimated atmospheric pressure at
Determining means for determining whether or not the atmospheric pressure sensor is abnormal by comparing the measured atmospheric pressure change amount and the estimated atmospheric pressure change amount;
An atmospheric pressure sensor abnormality detection device comprising: Measured atmospheric pressure detection means for detecting the atmospheric pressure by detecting the atmospheric pressure with an atmospheric pressure sensor,
Elevation that calculates current location information based on radio waves received from satellites, calculates the altitude of the current location from the current location information and pre-stored map information, and calculates an altitude atmospheric pressure that is an atmospheric pressure corresponding to the altitude of the current location Atmospheric pressure calculating means;
Estimated atmospheric pressure calculating means for obtaining atmospheric pressure information of the current location from the outside and calculating an estimated atmospheric pressure that is an atmospheric pressure based on the obtained atmospheric pressure information and the altitude atmospheric pressure;
By comparing the current measured atmospheric pressure detected by the actual measured atmospheric pressure detecting means with the current estimated atmospheric pressure calculated by the estimated atmospheric pressure calculating means, the abnormality of the atmospheric pressure sensor at the current time is compared. A determination means for determining presence or absence;
An atmospheric pressure sensor abnormality detection device comprising: Measured atmospheric pressure detection means for detecting the atmospheric pressure by detecting the atmospheric pressure with an atmospheric pressure sensor,
Elevation that calculates current location information based on radio waves received from satellites, calculates the altitude of the current location from the current location information and pre-stored map information, and calculates an altitude atmospheric pressure that is an atmospheric pressure corresponding to the altitude of the current location Atmospheric pressure calculating means ;
Estimated atmospheric pressure calculating means for obtaining atmospheric pressure information of the current location from the outside and calculating an estimated atmospheric pressure that is an atmospheric pressure based on the obtained atmospheric pressure information and the altitude atmospheric pressure;
A first measured atmospheric pressure at a first time point detected at the first point by the actually measured atmospheric pressure detecting means, and a second actually measured pressure value at a second time point detected at the second point by the actually measured atmospheric pressure detecting means. and atmospheric pressure, and the measured atmospheric pressure change amount calculating means for calculating a measured atmospheric pressure variation which is a difference,
The first estimated atmospheric pressure at the first time point calculated at the first point by the estimated atmospheric pressure calculating unit and the second time point calculated at the second point by the estimated atmospheric pressure calculating unit. Estimated atmospheric pressure change amount calculating means for calculating an estimated atmospheric pressure change amount that is a difference between the second estimated atmospheric pressure at
Determining means for determining whether or not the atmospheric pressure sensor is abnormal by comparing the measured atmospheric pressure change amount and the estimated atmospheric pressure change amount;
An atmospheric pressure sensor abnormality detection device comprising:

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