JPH0110564Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a physical quantity measuring circuit that calculates an average value per predetermined change in a physical quantity of another physical quantity calculated using a certain physical quantity as a variable.

2. Description of the Related Art Conventional physical quantity measuring circuits of this type include those shown in FIGS. 1 and 2, for example. The one in Figure 1 is a system that measures and displays the average fuel consumption rate (average fuel consumption) per 10 km of consumed fuel, and the one in Figure 2 is the system that measures and displays the average vehicle speed (average vehicle speed) per 10 km of vehicle travel distance. This is a system for measuring and displaying Km/h, and each conventional example will be explained in detail below.

First, the configuration of the average fuel consumption measuring circuit is shown in FIG.

The fuel sensor 101 outputs a digital signal according to the amount of remaining fuel in the fuel tank.

Control circuit 102 for EGI (electronic fuel injection device)
is a circuit that controls the amount of fuel injection supplied to the engine, and outputs a fuel injection pulse with a pulse width corresponding to the amount of fuel injection.

The fuel consumption calculation circuit 103 is a fuel sensor 101
and/or each output signal from the EGI control circuit 102, and sequentially calculates and outputs the cumulative value of fuel consumption.

The fuel consumption detection circuit 104 inputs the output signal from the fuel consumption calculation circuit 3, detects it every time one fuel is consumed, and outputs a detection signal.

The vehicle speed sensor 105 outputs a pulse train with a frequency proportional to the number of rotations of the wheels.

The counter 106 receives the detection signal from the fuel consumption calculation circuit 104 as a reset signal, and counts the pulses from the vehicle speed sensor 105 from the time the reset signal is received to the time the next reset signal is received. The counting result corresponding to the distance traveled by the vehicle while the fuel is consumed is output immediately before resetting.

Average fuel consumption rate calculation circuit (average fuel consumption calculation circuit)
107...Receives the detection signal from the fuel consumption amount detection circuit 104 as a latch signal, takes in the counting result from the counter 106 immediately before reset, that is, the counting result corresponding to the distance traveled by the vehicle while 1 fuel is consumed, and calculates the consumption. Average fuel consumption per fuel Km/
Outputs sequential calculations.

The storage circuit 108 stores 10 pieces of data on the average fuel consumption per unit of consumed fuel outputted from the average fuel consumption calculation circuit 107 every time the fuel consumption amount reaches 1, and stores the data in the order of output, and stores the data each time the latest data is outputted. The latest data is replaced with the oldest data and stored.

The averaging circuit 109 takes in 10 average fuel consumption data per unit of consumed fuel stored in the memory circuit 108 and calculates the arithmetic mean (arithmetic mean) of the 10 pieces of data. Outputs display data corresponding to the average fuel consumption.

The display circuit 110 displays the average fuel consumption per 10 units of consumed fuel based on the display data from the averaging circuit 109.

Next, the operation of the average fuel consumption measuring circuit having such a configuration will be explained. Based on the output signal of the fuel sensor 101 and/or the fuel injection pulse from the EGI control circuit 102, the fuel consumption calculation circuit 103 captures the cumulative value of fuel consumption, and based on the transition of the cumulative value, the fuel consumption calculation circuit calculates the cumulative value of the fuel consumption. When 104 detects that 1 fuel consumption has been made, the counting result of the counter 106 that counts the output pulses of the vehicle speed sensor 105 is read at the time of detection, and the average fuel consumption calculation circuit 107 calculates the average fuel consumption per 1 fuel consumption. , the latest average fuel consumption data is supplied to the storage circuit 108. The storage circuit 108 stores the latest data in place of the oldest data, supplies the latest stored contents, that is, 10 pieces of data including the latest data, to the averaging circuit 109, and the averaging circuit 109 reduces the fuel consumption by 10. The average fuel consumption per unit is calculated and displayed by the display circuit 110.

Next, FIG. 2 shows the configuration of the average vehicle speed measuring circuit.

Vehicle speed sensor 201 outputs a pulse train with a frequency proportional to the number of rotations of the wheels.

A counter 202 counts pulses from the vehicle speed sensor 201 and outputs a counting result corresponding to the cumulative distance traveled by the vehicle since the start of counting.

The mileage detection circuit 203 receives the output signal from the counter 202, detects it every time the vehicle travels 1 km, and outputs a detection signal.

The clock circuit 204 receives the detection signal from the mileage detection circuit 203 as a reset signal, and measures the elapsed time from the time the reset signal is received to the time the next reset signal is received, so that the vehicle travels 1 km. Outputs measurement results according to the elapsed time immediately before reset.

Average vehicle speed calculation circuit (average vehicle speed calculation circuit) 2
05 receives the detection signal from the mileage detection circuit 203 as a latch signal, takes in the measurement result just before reset from the timer circuit 204, that is, the measurement result corresponding to the elapsed time while the vehicle travels 1 km, and calculates the vehicle travel distance of 1 km. The average vehicle speed per hour (Km/h) is calculated and output one after another.

The memory circuit 206 stores 10 pieces of average vehicle speed data per 1 km of vehicle travel distance output from the average vehicle speed calculation circuit 205 every time the vehicle travels 1 km, and stores the data in the order of output, and stores the data every time the latest data is output. The latest data is replaced with the oldest data and stored.

The averaging circuit 207 takes in the data of the average vehicle speed per 1 km of travel distance of the 10 vehicles stored in the memory circuit 206, and calculates the arithmetic average of the 10 pieces of data, thereby calculating the travel distance of the vehicle of 10 km. Display data corresponding to the average vehicle speed per hit is output.

The display circuit 208 displays the average vehicle speed per 10 km distance traveled by the vehicle based on the display data from the averaging circuit 207.

Next, the operation of the average vehicle speed measuring circuit having such a configuration will be explained. By counting the output pulses from the vehicle speed sensor 201 with a counter 202, the accumulated value of the distance traveled by the vehicle is obtained, and when the traveled distance detection circuit 203 detects that the vehicle has traveled 1 km by looking at the change in the cumulative value, at the time of detection, Average vehicle speed calculation circuit 20 reads the elapsed time measured by the clock circuit 204
5, the average vehicle speed per kilometer of vehicle travel distance is calculated, and the latest average vehicle speed data is stored in the memory circuit 206.
is supplied to The storage circuit 206 stores the latest data in place of the oldest data, supplies the latest stored contents, that is, 10 pieces of data including the latest data, to the averaging circuit 207, and the averaging circuit 207 adjusts the running speed of the vehicle. The average vehicle speed per 10km distance is calculated and displayed by the display circuit 208.

By the way, in such a conventional physical quantity measuring circuit, the minimum detection unit of the fuel consumption amount in the measurement of the average fuel consumption in Fig. 1 or the minimum detection unit of the vehicle travel distance in the measurement of the average vehicle speed in Fig. 2 is 1 or 1 km, respectively. However, in this case, the response is poorer than when the minimum detection unit of fuel consumption or vehicle travel distance is set to 1 or smaller than 1 km, such as 0.1 or 0.1 km. If the difference between the data and the latest data newly stored is large, the range of change when updating the measured value of average fuel consumption or average vehicle speed will become large. However, in the configuration of the conventional physical quantity measuring circuit as shown in FIG. 1 or 2, when calculating the average fuel consumption or the average vehicle speed, the minimum detection unit is changed to 10 or 10 km without changing the amount to be averaged. 0.1 or
If you try to set it to 0.1 km, it will improve responsiveness and prevent the range of change when updating the measured values of average fuel consumption or average vehicle speed from becoming large, but it will require a significant increase in storage capacity and the cost of the storage circuit will be high. There was a problem with that.

This idea was made by focusing on these conventional problems, and when calculating average fuel consumption or average vehicle speed, etc., it is possible to reduce the minimum detection unit to 1 without changing the amount to be averaged, such as 10 or 10 km. The purpose of the present invention is to solve the above problem by creating a configuration in which even if the minimum detection unit is reduced from 1 Km to 0.1 or 0.1 Km, the same storage capacity is required as when the minimum detection unit is 1 or 1 Km.

This invention will be explained below based on the drawings.

FIG. 3 is a diagram showing an average fuel consumption measuring circuit which is an embodiment of this invention.

First, the configuration will be explained. Generally, a fuel sensor 101, an EGI control circuit 102, a vehicle speed sensor 10
5. Fuel consumption rate calculation circuit 100, memory circuit 10
8, an averaging circuit 114 and a display circuit 110.

Each of these components will be explained in detail below, but the same components as in FIG.

The fuel consumption rate calculation circuit 100 includes a fuel consumption calculation circuit 103, a fuel consumption detection circuit 111, a decimal counter 112, a counter 106, and an average fuel consumption rate calculation circuit 113. The fuel consumption and the vehicle travel distance (the second physical quantity of the invention) are repeatedly detected, with the period until the first physical quantity of the invention becomes 1 as one cycle, and each time the fuel consumption increases by 0.1. The fuel consumption calculation circuit 103 sequentially calculates and outputs the fuel consumption rate (the third physical quantity of the present invention) obtained from the distance traveled per fuel consumption from the time of detection start to that time. have the same configuration, and the fuel sensor 101 and/or
Each output signal from the EGI control circuit 102 is input, and the cumulative value of fuel consumption is sequentially calculated and output.

The fuel consumption calculation circuit 111 inputs the output signal from the fuel consumption calculation circuit 103, and calculates the fuel consumption by 0.1.
Every time it is consumed, it is detected and a detection signal is output.

Decimal counter 112 is fuel consumption detection circuit 11
The number of detection signals output from 1 is counted repeatedly from 1 to 10, and when the 10th detection signal is counted, the 4-bit output terminal O returns to the initial state and the carry terminal C
Outputs a carry signal from.

The counter 106 has the same configuration as that in FIG. 1, receives the carry signal from the decimal counter 112 as a reset signal, and receives pulses from the vehicle speed sensor 105 from the time the reset signal is received until the time the next reset signal is received. This counts the amount of fuel, and outputs the counting result according to the distance traveled by the vehicle until one fuel is consumed.

Average fuel consumption rate calculation circuit (average fuel consumption calculation circuit)
113 receives the detection signal from the fuel consumption amount detection circuit 104 as a latch signal, and receives the counting result from the counter 106, that is, the counting result corresponding to the distance traveled by the vehicle from the first fuel until it is consumed;
The counting result from the output terminal O of the decimal counter 112 is taken in, and each time the fuel consumption increases by 0.1, the average fuel consumption Km/ from the detection start point (fuel consumption 0 point) to that time is calculated, that is, the fuel consumption 0.1
Average fuel consumption per unit, average fuel consumption per 0.2 consumed fuel,
~, the average fuel consumption per 0.9 fuel consumption and the average fuel consumption per 1 fuel consumption are calculated and output in sequence. In addition,
The average fuel consumption per 0.1 to 0.9 fuel consumption is output to an averaging circuit 114, which will be described later, and the average fuel consumption per 1 fuel consumption is output to a storage circuit 108.

The averaging circuit 114 outputs fuel consumption rate data from the detection start point to that moment, which is output from the average fuel consumption calculation circuit 113 every time the fuel consumption increases by 0.1 (i.e., data on the average fuel consumption per 0.1 to 0.9 fuel consumption). ) and are stored in the memory circuit 108.
Data on fuel consumption rate per fuel consumption amount of 1 of 10 (i.e. data on average fuel consumption per unit of fuel consumed)
and the counting result from the decimal counter 112, and each time the latest fuel consumption rate data is output from the average fuel consumption calculation circuit 113, the latest fuel consumption rate data and 10 1's are input. The oldest data of the fuel consumption rate data per fuel consumption amount is used to calculate a weighted average weighted by the fuel consumption amount at the time, and 1 is calculated by the weighted average.
This method calculates the arithmetic average of the fuel consumption rate data per fuel consumption amount and the remaining 9 data after removing the oldest data from the 10 1 fuel consumption rate data. be. The above structural description will be described in more detail using mathematical formulas. In Figure 4,
The "•" mark on the time axis indicates the time when 0.1 fuel consumption was detected, and the "▽" mark indicates the time when 0.1 fuel consumption was detected for the 10th time. Furthermore, Xi is the average fuel consumption per unit of consumed fuel found at the time of ▽ (i is an integer), and 0.1×j (j is 1 to 9) after finding Xi.
If the average fuel consumption per 0.1×j of fuel consumption at the time of fuel consumption is Xi+ ₁ , j, then the average fuel consumption per 10 fuel consumption found at the time of _i+10 ▽ is Yi+ ₁₀ and 0.1 after the time of _i+10 ▽ Fuel consumed at the time of fuel consumption of ×j
Average fuel consumption per 10Yi+ ₁₀ . j is Yi+ ₁₀ =Xi+ ₁ +Xi+ ₂ +...+Xi+ ₁₀ /10...
…(1) Yi+ ₁₀ , j=10−j/10・Xi+ ₁ +Xi+ ₂ +…
...+Xi+ ₁₀ +j/10・Xi+ ₁₁ , j/10...(2).

Next, the action will be explained.

10 average fuel efficiency data per consumed fuel output from the fuel consumption rate calculation circuit 100 every time one fuel is consumed and stored in the storage circuit 108;
For example, Xi+ ₁ , Xi+ ₂ , ... Xi+ ₁₀ , and the consumed fuel 0.1, 0, 2, ... outputted from the fuel consumption rate calculation circuit 100 each time one fuel is consumed.
..., average fuel consumption data per 0.9, e.g. Xi+ ₁₁ ,
₁ , Xi+ ₁₁ , ₂ ,..., Xi+ ₁₁ , ₉ is the averaging circuit 11
For example, at the time of _i+10 ▽, the average fuel efficiency Yi+ ₁₀ per 10 consumed fuel is calculated based on equation (1) above.
Also, at the fuel consumption point of 0.1×j after point _i+10 ▽, the average fuel consumption per 10 points of consumed fuel is calculated based on equation (2) above.
Yi+ ₁₀ ,j are calculated, and they are displayed in the display circuit 110.
Displayed by.

FIG. 5 shows another embodiment.

This embodiment is an average vehicle speed measuring circuit, and the configuration will be explained first. Generally speaking, vehicle speed sensor 20
1. Consists of a vehicle speed calculation circuit 200, a storage circuit 206, an averaging circuit 212, and a display circuit 208.

Each of these components will be explained in detail below, but the same components as those in FIG. 2 will be given the same reference numerals and their explanation will be omitted.

The vehicle speed calculation circuit 200 includes a counter 202, a travel distance detection circuit 209, a decimal counter 210, a timing circuit 204, and an average vehicle speed calculation circuit 211.
Distance traveled by the vehicle from the start of detection (first step of the present invention)
The distance traveled by the vehicle and the elapsed time (the second physical quantity of the present invention) are repeatedly detected, with the period until the physical quantity (physical quantity) reaches 1 km as one cycle, and each time the distance traveled by the vehicle increases by 0.1 km. The counter 202 sequentially calculates and outputs the vehicle speed (the third physical quantity of the present invention) obtained from the distance traveled by the vehicle per elapsed time from the start point to that time, and the counter 202 has the same configuration as the one in FIG. Pulses from the vehicle speed sensor 201 are counted and a counting result corresponding to the cumulative distance traveled by the vehicle from the start of counting is output.

The travel distance detection circuit 209 receives the output signal from the counter 202, detects it every time the vehicle travels 0.1 km, and outputs a detection signal.

The decimal counter 210 is connected to the mileage detection circuit 20.
The number of detection signals output from 9 is counted repeatedly from 1 to 10, and when the 10th detection signal is counted, the 4-bit output terminal O returns to the initial state and the carry terminal C
Outputs a carry signal from.

The clock circuit 204 has the same configuration as that in FIG. 2, and receives the carry signal from the decimal counter 210 as a reset signal, and measures the elapsed time from the time the reset signal is received to the time the next reset signal is received. As a result, measurement results are output according to the elapsed time until the vehicle travels 1 km.

The average vehicle speed calculation circuit 211 is the traveling distance detection circuit 2
09 as a latch signal, the measurement result from the timing circuit 204, that is, the measurement result corresponding to the elapsed time until the vehicle travels 1 km, and the counting result from the output terminal O of the decimal counter 210. Every time the vehicle's travel distance increases by 0.1 km, the average vehicle speed from the detection start point (vehicle's travel distance of 0 km) to that time is calculated, i.e., the average vehicle speed per 0.1 km of vehicle travel distance, the vehicle Average vehicle speed per 0.2 km of distance traveled, ~, distance traveled by the vehicle
The average vehicle speed per 0.9km and the average vehicle speed per 1km of vehicle travel distance are calculated and output in sequence. Note that the average vehicle speed per 0.1 to 0.9 km of vehicle travel distance is output to an averaging circuit 212, which will be described later, and the average vehicle speed per 1 km of vehicle travel distance is output to storage circuit 206.

The averaging circuit 212 collects average vehicle speed data from the detection start point to that time (i.e., data per vehicle travel distance of 0.1 to 0.9 km), which is output from the average vehicle speed calculation circuit 211 every time the vehicle travel distance increases by 0.1 km. data on the average vehicle speed), data on the average vehicle speed per kilometer of travel distance of the 10 vehicles stored in the memory circuit 206, and the counting result from the decimal counter 210 are inputted, and the average vehicle speed calculation circuit 211 inputs Every time the latest average vehicle speed data is output, the latest average vehicle speed data and the mileage of 10 vehicles1
A weighted average is calculated based on the oldest data of the average vehicle speed data per km, and the weighted average is weighted according to the distance traveled by the vehicle at the time. This method calculates the arithmetic average of the vehicle speed data and the remaining nine data after removing the oldest data from the data of the average vehicle speed per kilometer traveled by 10 vehicles. In addition, mathematically, Xi is the average vehicle speed per 1 km of vehicle travel distance at time _i ▽, Xi + ₁ , j is 0.1 × jKm after time _i ▽
If the average vehicle speed per 10 km of vehicle travel distance at the time of travel is _i+10 ▽, then the average vehicle speed per 10 km of vehicle travel distance at time i+10 ▽ Yi + ₁₀ and _i+10 ▽ after time
The average vehicle speed Yi+ ₁₀ ,j per 10 km of travel distance of the vehicle at the time of traveling 0.1×jKm is expressed by equations (1) and (2) in the above-mentioned embodiment.

Next, to explain the operation, the vehicle speed calculation circuit 200 outputs an output to the memory circuit 200 every time the vehicle travels 1 km.
Data on the average vehicle speed per mile of 1 km of 10 vehicles stored in 6, for example, Xi+ ₁ , Xi+ ₂ ,...,
From Xi+ ₁₀ and vehicle speed calculation circuit 200, the vehicle is 0.1km
The mileage of the vehicle output every time it travels is 0.1
Km, 0.2 Km, ... Average vehicle speed data per 0.9 Km, for example, Xi + ₁₁ , ₁ , Xi + ₁₁ , ₂ , ..., Xi + ₁₁ , ₉ are supplied to the averaging circuit 212, and for example, at the time of _{i + 10} ▽ Then, based on equation (1), the average vehicle speed per 10 km of vehicle travel distance is Yi + ₁₀ , and at the time of travel of 0.1 × j km after _{i + 10} ▽ time, based on equation (2), the average vehicle speed per 10 km of vehicle travel distance is The average vehicle speed Yi+ ₁₀ ,j is calculated and displayed by the display circuit 208.

In each of the above embodiments, the average fuel consumption calculation circuit 100, the average vehicle speed calculation circuit 200, the memory circuits 108, 206, and the averaging circuits 114, 212, which constitute the detection circuit of the present invention, are configured using an on-vehicle microcomputer. You may.

Further, in each of the above embodiments, it is assumed that the entire system is initialized when the power supply is connected, but a manual reset circuit is provided to control the various arithmetic circuits 103, 113, 211, and the various detection circuits 1.
11, 209, counter 106, clock circuit 20
4. It goes without saying that the memory circuits 108 and 206 may be configured to be reset at any time.

As explained above, according to this idea,
The configuration is configured by repeatedly detecting the amount of change in the first physical quantity and the second physical quantity, with one cycle being a period until the amount of change from the time of detection start of the first physical quantity becomes a predetermined number times the minimum detection unit, A detection circuit that sequentially outputs data x, 100, 200 and the detection circuit 1
00,200, the third value is output every time the amount of change of the first physical quantity from the detection start point becomes a predetermined number of times the minimum detection unit. Physical quantity data Xi, Xi
A predetermined number of + ₁ , ... are stored in the output order, and the third
storage circuits 108 and 206 that replace and store the latest data Xi+ ₁₀ with the oldest data Xi every time the latest data Xi+ ₁₀ of the physical quantity is output; Data of the third physical quantity xi+ ₁₁ , ₁ , xi+ ₁₁ , ₂ ... or xi+ ₁₁ , ₉ , which is outputted every time the amount of change increases by the minimum detection unit, from the detection start point to that time, and the storage circuit 108, Data of the third physical quantity per a predetermined number of times the minimum detection unit of the predetermined number of first physical quantities stored in 206 Xi+ ₁ , Xi+ ₂ ,
..., Xi+ ₁₀ , and the detection circuit 100,
Latest third physical quantity data from 200 xi+
Every time ₁₁ , ₁ , xi + ₁₁ , ₂ , ... or xi + ₁₁ , ₉ is output, the latest third physical quantity data xi + ₁₁ , ₁ ,
xi+ ₁₁ , ₂ ,..., or xi+ ₁₁ , ₉ and a predetermined number of first
The change in the first physical quantity from time to time is determined by the third data Xi+ ₁ , Xi+ ₂ , ..., the oldest data Xi+ ₁ among Xi+ ₁₀ per change amount of a predetermined number times the minimum detection unit of the physical quantity. weighted average weighted by quantity
10−j/10Xi+ ₁ +j/10・xi+ ₁₁ , j is obtained, and the data obtained by the weighted average and the third Averaging circuits 114 and 212 that output the arithmetic average of the remaining data Xi+ ₂ , Xi+ ₃ , ..., Xi+ ₁₀ after removing the oldest data from the physical quantity data of
Since the physical quantity measurement circuit is characterized by the following, the minimum detection unit can be changed from 1 or 1 km to 0.1 without changing the amount to be averaged, such as 10 or 10 km when calculating average fuel consumption or average vehicle speed, etc.
Or even if it is as small as 0.1Km, the minimum detection unit is 1
Or, similar to the case where the storage capacity is increased with the same storage capacity as that for 1 km, it is possible to improve responsiveness and prevent the range of change when updating the measured value of average fuel consumption or average vehicle speed from becoming large.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional average fuel consumption measuring circuit, Fig. 2 is a block diagram showing a conventional average vehicle speed measuring circuit, and Fig. 3 is a block diagram showing an average fuel consumption measuring circuit which is an embodiment of the present invention. , FIG. 4 is an explanatory diagram of its operation, and FIG. 5 is a block diagram showing an average vehicle speed measuring circuit which is another embodiment of the present invention. 100... Fuel consumption rate calculation circuit, 101... Fuel sensor, 102... EGI control circuit, 103...
... Fuel consumption calculation circuit, 105 ... Vehicle speed sensor, 1
06... Counter, 108... Memory circuit, 110
... Display circuit, 111 ... Fuel consumption detection circuit,
112... Decimal counter, 113... Average fuel consumption calculation circuit, 114... Averaging circuit, 200... Vehicle speed calculation circuit.

Claims (1)

[Claims for Utility Model Registration] One cycle is defined as the period during which the amount of change in the first physical quantity and the second physical quantity from the time when detection of the first physical quantity is started becomes a predetermined number of times the minimum detection unit. Through repeated detection, each time the amount of change in the first physical quantity increases by the minimum detection unit, data on the third physical quantity (x, ), and the detection circuit 10
0,200 to the first physical quantity from the start point of detection is a predetermined number of times the minimum detection unit. Physical quantity data (Xi, Xi
+ ₁ , ...) in the order of output, and each time the latest data (Xi + ₁₀ ) of the third physical quantity is output, the latest data (Xi + ₁₀ ) is set as the oldest data (Xi). A storage circuit 108 that stores information by replacing
206 and a first
The data of the third physical quantity from the time of detection start to that time (Xi + ₁₁ , ₁ , Xi + ₁₁ , ₂ , ...) is output every time the amount of change in the physical quantity increases by the minimum detection unit.
or Xi+ ₁₁ , ₉ ) and the third physical quantity data (Xi+1, Xi+ ₂ ) per change amount of a predetermined number times the minimum detection unit of the predetermined number of first physical quantities stored in the storage circuits 108, _206. , ..., Xi+ ₁₀ ), and input the latest third physical quantity data (Xi+ ₁₁ , ₁ , Xi+ ₁₁ , ₂ ,
...or Xi+ ₁₁ , ₉ ) is output, the latest third physical quantity data (Xi+ ₁₁ , ₁ , Xi+ ₁₁ , ₂ ,
...or Xi+ ₁₁ , ₉ ) and the third physical quantity data (Xi+ ₁ , Xi+ ₂ ,..., Xi+ ₁₀ ) per a predetermined number of changes in the minimum detection unit of a predetermined number of first physical quantities. _The oldest data (Xi + ₁ ) _of The remaining data (Xi+ ₂ , Xi+ ₃ , ...,
An averaging circuit 11 that outputs the arithmetic average of Xi+ ₁₀ )
A physical quantity measuring circuit comprising: 4,212.