JPS6052641B2 - Traveling information display device for electric vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving information display device for an electric vehicle.

2. Description of the Related Art Usually, a meter or display device is provided in the driver's seat of an automobile to display various driving information such as distance traveled and speed.

Even in electric vehicles that are equipped with a storage battery as a driving energy source and a driving motor that is driven by the electric power of the storage battery, it is essential to display mileage, driving speed, etc. Information regarding the power consumption of the storage battery is required information. In addition, the mileage measured from zero for each trip, and various travel information obtained by comparing with preset values, such as the distance to the destination, necessary to arrive at the destination by the scheduled time. It is desirable to display information such as the current driving speed and how much power is remaining. In an electric vehicle, this invention displays information regarding various driving conditions, including information regarding power consumption of a storage battery specific to electric vehicles, to facilitate driving operations, and multiplexes a large amount of information into a small display area. To provide a driving information display device that can save display space by displaying information on a vehicle.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the overall configuration of a driving information display device for an electric vehicle.

Rotary transducer 1 is used as a sensor for measuring running conditions.
There are three types: 51, current detector 152, and clock 153. Rotating transducer 151 is an electric car! It is attached to the rotating shaft of the travel drive system, detects the amount of wheel rotation, and outputs a series of pulses proportional to the amount of wheel rotation. The current detector 152 detects the current flowing through the travel drive motor of the electric vehicle, and the details will be described later. Current detector 15
The second detection signal is converted into a digital quantity by an A/D converter 154. The clock 153 includes a crystal oscillation circuit, and clocks in at 0.00 seconds every 0 seconds. A forging pulse Ps and a 1-minute pulse Pm are output every minute. The travel information display device includes a key input device 160, a display 180, and an alarm 185 as input/output devices. The key input device 160 is a second
As shown in the figure, a numeric keypad 170 and a mode setting key 161
, 162, 163, input key 165, set key 16
4 and a reset key 166. Mode setting keys 161 to 163 self-hold when pressed. The keys for inputting numerical values 7, 4, 1, and 0 of the numeric keypad 170 are also used as item input keys when inputting alarm set values and reference set values, which will be described later, regarding distance, speed, power, and time. . Each of these keys is 171~
174. The display device 180 has four display areas 181 to
184 and 4 regarding distance, speed, power and time.
Item information can be displayed simultaneously. These various display information are displayed by three sensors 151, 152, 153.
The microprocessor 150 (
(hereinafter referred to as the CPU). Alarm 185
As will be described later, the alarm sounds when the content of various display information reaches a preset alarm setting value. The microprocessor 150 has a data memory 2 in addition to a program memory (not shown) that stores its execution program.
00 and a clock pulse generator 155. The clock pulse output from the pulse generator 155 is divided into 10 KHz pulses by a frequency divider 156 and input to a counter 157. The count output of the counter 157 is used to calculate the traveling speed, as will be described later. data·
The memory 200 includes an area 201 for storing display information;
An area 202 for storing pre-input alarm setting values and reference setting values and an area 203 for storing data necessary for calculation are provided. An address (not shown) is assigned to each storage location in each of these areas 201-203. The following table shows the display contents displayed on the display 180. Indicator 18 as described above
0 displays information regarding four items: distance, speed, power, and time. There are also three display modes, and three types of display information for each item are provided depending on these modes.

Mode 1 is a mode for displaying information regarding the actual driving state, and is the most common display form. Mode 1
When set to , the total traveling distance DT1 traveling speed V1 power consumption rate PD and time t are displayed on the display 180. These display contents are stored in storage locations 211, 213, 215 and 217 in storage area 201 of memory 200, respectively. The total mileage DT is the cumulative value of the mileage of the electric vehicle. The traveling speed is the actual traveling speed at each point in time. The power consumption rate PD means the distance traveled per 1 AH (ampere hour), and indicates how far the vehicle can travel per 1 AH of electric power. Time t is the actual time at each point in time. Mode 2 is a mode in which the amount measured from zero is displayed every time it is reset.

The mileage (1) is displayed on the display 180 set to mode 2.
, average speed VA, average power consumption rate PDA, and elapsed time m are displayed. These display contents are stored in storage locations 219, 221, 223 and 225 within area 201, respectively. Mileage (1) and elapsed time m
This is the value measured since the time it was reset, and the average speed A
is the value obtained by dividing the traveling distance DO by the elapsed time m. As will become clear from what will be described later, the average power consumption rate PDA is
The power consumption rate is measured every minute after being reset, and the results are averaged. Mode 3 is a mode in which the amount obtained by comparison with a reference setting value inputted in advance by the key input device 160 is displayed.

When mode 3 is set, the remaining distance DR, required average speed VNA, remaining power PR and remaining time R are displayed on the display 180.
will be displayed. These display contents are stored in storage locations 227, 229, 231 and 233 within area 201, respectively. The reference setting values include the target distance DS and the charging amount P to the target time, and these setting values are stored in the memory locations 228 and 234 in the area 202 and in the area 2.
They are respectively stored in storage locations 231 within 01. The target distance DS is, for example, the distance from the departure point to the destination when the destination is determined, and the target time TS is the estimated time of arrival or desired time of arrival considering the time required to arrive at the destination. It is. These target distances DS and target times are preset prior to departure. The charge amount P is set when the storage battery is charged. The traveling distance (1) and elapsed time m in mode 2 are used to calculate the remaining distance DR and remaining time TR, and the remaining distance D
As will be described later, R is obtained by subtracting the travel distance DO from the target distance DS, and therefore indicates how many more miles it will take to reach the destination. The remaining time TR is the value obtained by subtracting the current time t from the target time, and the target time is 11
It shows the time remaining to arrive at the destination by the TS. The required average speed NA indicates the average speed at which the vehicle can reach the destination within the target time of 1rrs, and is the value obtained by dividing the remaining distance DR by the remaining time TR. The remaining power PR indicates the power obtained by subtracting the already consumed power from the charging amount P. The consumed power here is the integrated value of the power consumed since the last time the battery was charged. The distance display is updated every unit distance (1k!n), and the speed display is updated every 0.5 seconds. Furthermore, the display regarding power is updated every minute. The minimum unit of nine hours is one minute, and the display is updated every minute.

In this embodiment, there are nine types of alarm setting values, which correspond to each item in modes 1 and 2 and the remaining power PR in mode 3, respectively.

The total travel distance alarm setting value DTa and the travel distance alarm setting value DOa are the total travel distance DT and the travel distance DO, respectively.
, and are stored in storage locations 212 and 220 in storage area 201 of memory 200, respectively. The travel distance alarm set value DOa can be used in conjunction with the above-mentioned target distance DS. For example, if the set value DOa is set to a value smaller than the target distance DS by the distance d,
An alarm sounds when the electric vehicle reaches a distance d before the target distance DS (destination). Conversely, if most of the set values are set to values greater than the target distance DS by the distance d, the alarm 185 will sound an alarm when the target distance DS is exceeded by the distance d. Further, if the set value DOa is set equal to the target distance DS, an alarm will sound when the traveling distance (1) becomes exactly equal to the target distance DS. The total mileage alarm setting value DTa is suitable for setting the sights on the final destination when a series of trips are made, stopping at multiple destinations in sequence and a target distance DS is set for each destination. used. In this case, the set value DTa is the sum of the total travel distance at the time of departure and the travel distance to the final destination, or a value close to this. The time alarm setting value Ta and the elapsed time alarm setting value TOa correspond to the time t and the elapsed time TO, respectively, and are stored in the storage locations 218 and 218 in the area 201, respectively.
226.

The set value Ta may be set to the time at which the alarm 185 is desired to sound, and is used as a kind of alarm timer. Preferably, the setpoint TOa is also used in conjunction with the target time TS. Set this set value TOa to the target time TS or here. If you set it to a value close to that, you'll be on target! An alarm will sound when 11jTS has elapsed or at a time close to this. The traveling speed alarm setting value Va and the average speed alarm setting value VAa are based on the traveling speed and the average speed A! They are correspondingly stored in storage locations 214 and 222 within area 201.

These set values Va and k can be used to alert the driver and limit the maximum speed. Power consumption rate alarm setting value PDal Average power consumption rate alarm setting? D.A.
a and remaining power alarm setting value PRa correspond to power consumption rate PDl, average power consumption rate PDA, and remaining power PR, respectively, and are stored in storage locations 216, 224 and 232 in area 201, respectively.

Since the power consumption rates PD and PDA represent power consumption efficiency, these set values PDa and PDAa serve as a measure of the quality of the operating state in terms of power consumption efficiency. The set value PRa is used to call attention to the fact that the electric power is running low, and is preferably set to a value with some margin. Regarding distance, speed, and time, an alarm will sound if the displayed contents exceed the corresponding alarm set value, and for force, the alarm 185 will sound if the displayed contents become less than the corresponding alarm set value. Sound the alarm. Further, the number displayed on the display 180 is blinked to indicate which item is causing the alarm. If necessary, press the mode setting key 1.
It is preferable that keys 61 to 163 are illuminated, and the keys corresponding to the displayed mode are lit. Regarding distance and time, the alarm 185 will issue an alarm for the required time (for example, 5 seconds) and then automatically stop, while regarding speed and force, it will continue as long as the displayed content exceeds or falls below the alarm set value. An alarm sounds. Now, information about distance can be obtained as follows.

Since 637 pulses are output from the rotary transducer 151 when the electric vehicle travels l-, the vehicle travels approximately 1.57 m per pulse.

Therefore, the distance D can be found as follows.

Storage location 23 in area 201 of data memory 200
5 is used as the 1k1n counter for mode 1 and memory location 236 is used as the 1km counter for mode 2.

Let the contents of these 1-counters 235 and 236 be Ml and m2, respectively. Rotating transducer 151-1
These 1-counters (
+1.57 to the contents of addresses 235, 236). Then, each time the contents of these counters exceed 1000, the contents of storage locations 211 and 219 in area 201 are
1, the total traveling distance DT and the traveling distance DO can be obtained. Further, the remaining distance DR is calculated from as described above.

Referring to FIG. 3, the running speed V is determined by measuring the period T of the output pulses of the rotary transducer 151.

The period T is measured by counting the pulses output from the frequency divider 156 with a counter 157. 6 electric cars
When the vehicle is running at a speed of 0-/H, the transducer 151 outputs 637 pulses/minute. Since the frequency F6O of this pulse is, the speed 1 per 1 Hz is
ゞτu●υuAυn…●′
It becomes e--.

On the other hand, since the frequency of the output clock pulse of frequency divider 156 is 10 KHz, its period Tc is. The period T of the output pulses of the rotary transducer 151 is expressed as L, where the number of clock pulses of the divided period 156 output during this period T is (n) (count value of the counter 157).

Since the frequency f of the output pulse of the rotary transducer 151 is 11, the speed is obtained by multiplying this by the speed 1 per 1 Hz (Equation 5).

In other words, do you want it?゛5π;.

``This mileage DdM is stored in memory location 243.
In the storage location 211 in the storage area 201, the total traveling distance DT in units of 1 km is 〈. Further, the average speed VA and the required average speed VNA are each calculated from the following equations.

The speed of an electric vehicle is controlled by using a thyristor to control the current flowing to the travel drive motor.

The current detector 152 includes a shunt that detects the current flowing to the drive motor and an integrator that integrates the output of this shunt. The current detected by the shunt is a pulse wave, which is smoothed by the integrator as shown in FIG. The output of the integrator is converted into a digital quantity by the A/D converter 154, and is taken in by the CPU 150 every 0 seconds. C.P.
In Ul5O, the output of the A-D converter 154 is
0 times) and divide this by 120 to calculate an average current of 1 MA per minute. Assuming that the electric vehicle travels a distance of DdMm during this one minute, the power consumption rate PD is given by the following equation. In the storage area 203 of the data memory 200, there are storage locations 237, 238, 239, 243 for the previous total travel distance DdB, the cumulative current for 1 minute of 1M, the average current for 1 minute of 1MA, and the travel distance for 1 minute. is provided.

As described later, A sampled every 0.58
The output of -D converter 154 is added to the contents 1M of memory location 238. Then, when one minute has elapsed, the average current IMA is calculated and stored in storage location 239.
Also, the total distance traveled 1 minute ago (previous time) DdB is stored in memory location 23.
7, the distance traveled for one minute is stored as the total distance traveled this time (after one minute) (DdT), and the 1 km counter 235 in the area 203 stores the traveled distance m1 less than 1 km. Since it is memorized, the total distance traveled DdT
, DdB are both calculated by calculating the sum (DT+m1) of the contents of these storage locations 211 and 25.

The average power consumption rate PDA is the power consumption rate P obtained by the above calculation.
It is obtained by adding D every minute and dividing this by the number of additions N.

In other words, one. ．． 5--, 7,. 、． , The previous divine thunder'IlmRB) x BO-~In the area 203 of the data memory 200, there are a location 240 for storing the added value PMN for each minute of the power consumption "4PDM" and a storage location 241 for the number of additions N. is set.Remaining power PR is also calculated every minute.

This remaining power is determined from the following equation using the remaining power from the previous time (1 minute ago) as PRB and an average current of 1 MA for 1 minute. The contents of the memory location 231 in the area 201 are the remaining power P
It is rewritten every time R is calculated.

Furthermore, in equation (15), when the storage battery is charged, the charging amount P is used instead of the previous remaining power PRB. Time t is obtained by reading the output of clock 153.

In area 203 of data memory 200, mode 2
A location 242 is provided to store the time Ts at which the setting process (set to A) described later was executed. The elapsed time m is calculated from the following equation using this set time interval. Further, the remaining time TR is determined using the following equation as described above. Prior to driving the electric vehicle, alarm set values and reference set values for each mode are input using the key input device 160.

To operate these settings, first. Mode setting key 161
- 163 to set the remote, then press the input key 165, specify an item using the item input keys 171 to 174, input the set value using the numeric keypad 170, and finally press the set key 164. And in the same mode. The input key 165 is pressed each time the set value of each item is input.
FIG. 5 shows the processing procedure of the CPU 150 in response to the setting value input operation. Referring to this diagram, check which mode is set (steps 1 to 3), and if mode 1 is set, proceed to step 4.
Check whether the input key 165 is pressed. input key 16
If 5 is pressed, it is area 20 of data memory 200.
Each alarm setting value DTa, Va, P stored in memory locations 212, 214, 216 and 218 in 2, respectively.
Da and Ta are displayed in each display area 181 to 1 of the display 180.
84 (steps 5 to 8). If the current alarm setting value has already been input, the setting value will be changed to
If no settings have been entered yet, the previous settings will be displayed. Next, it is checked in order whether or not the item input keys 171 to 174 for input items such as distance, speed, force, or time have been pressed (steps 9, 12, 15, 18), and if any key is pressed, the next step is to Check whether the set key 164 is pressed (steps 10, 13, 16, 1).
9). If the set key 164 is pressed, it means that the alarm set value has already been input using the numeric keypad 170. Therefore, if the set key 164 is pressed, the set value input using the numeric keypad 170 is read. , storage locations 212 and 21 in area 22 of data memory 200
4, 216, and 218 at a location corresponding to that item (steps 11, 14, 17, and 20). and,
Return to step 4 and repeat steps 4 to 20. If none of the item keys 171-174 have been pressed, the determinations in steps 9, 12, 15, and 18 are repeated. When mode 2 is set, first press the set key 164.
Check to see if has been pressed (step 21). Mode 2
Since this is a mode in which the amount measured from zero is displayed each time it is set, it is necessary to reset the required data in the data memory 200 in advance. This reset operation is performed by inputting the numerical value 0 using the numeric keypad 170 and then pressing the set key 164. The fact that the set key 164 was pressed after setting mode 2 means that the above reset operation has been performed, so proceed to step 22 and store the memory locations 219, 225,
In addition to resetting each data DO, TO, PMN of 240 and 241 and the number of additions N, 1- of mode 2 is reset.
Reset memory location 236 used as a counter. Then, the current time is read from the clock 153 as a set time and stored in the storage location 242 (step 23). Next, it is checked whether the input key 165 has been pressed (step 24), and if YES, the mileage, average speed, average power consumption rate, and Each alarm setting MDOa, VA3, PDAa, and TOa for the elapsed time is displayed in each display area 181 to 184 of the display 180 (steps 25 to 28). When this display process is completed, check which item keys 171 to 174 have been pressed (steps 29, 32, 35, 38), and if any item key has been pressed, set key 164 is pressed. After confirming that (steps 30, 33, 36, 3)
9), each alarm setting value D input using the numeric keypad 170
Oa, VAa, PDAa, and 'IOa are read and stored in the corresponding memory locations, and the process returns to step 21. The above reset operation only needs to be performed once, so once YES has been determined in step 21, it will never become YES, and the process will proceed from step 21 to step 24, and then proceed to steps 24 to 40.
Repeat the process. Processing of Yanghe with mode 3 set (
Steps 41 to 53) also apply to step 4 in mode 1.
-20 processing and steps 24-4 in mode 2
The processing is exactly the same as the processing for 0.

However, in mode 3, the alarm setting value is only the remaining power alarm setting value PRa, and regarding the distance and time, the target distance DS and target time 11TS are input. The input operation for these target values DS and TS is also exactly the same as the input operation for the alarm set value. Furthermore, there is no set value for speed. Note that when 0 is entered as the alarm setting value using the numeric keypad 170, the alarm operation is prohibited and no alarm is generated.

Furthermore, when setting the amount of charge after charging, the operation is exactly the same as the input operation of the various setting values described above, and the amount of charge P entered by the key is stored in the storage location 231 of the data memory 200. Ru. The flow chart shown in FIG. 5 includes not only input operation processing for various setting values, but also data processing and display processing regarding time.

If none of the modes 1 to 3 has been set, the process moves to step 61, and the time (time in units of one minute) is read from the total 153 and stored in the storage location 271 in the area 201. Next, the elapsed time TO and the remaining time TR are calculated using equations (16) and (17), and are stored in the corresponding storage locations 225 and 233, respectively (step 62
, 63). After this process, the process returns to step 1. If the input key 165 to which mode 1 is set is not pressed, the process moves from step 4 to step 64, where time t is read from the storage location 217 and displayed on the display area 184 of the display 180. Then, this time t is compared with the time alarm setting value Ta (step 65), and if t>twist, an alarm is issued (step 66). Similarly, mode 2
is set and the input key 165 is not pressed, the process moves from step 24 to step 67, and the elapsed time WO is read out from the storage location 225 and displayed in the display area 184. Thereafter, the elapsed time TO and the alarm set value TOa are compared (step 68), and if TO>TOa, an alarm is sounded (step 69). In mode 3, if NO in step 41, the process moves to step 70, where the remaining time TR is read from the storage location 233 and displayed on the display area 184 of the display 180. If NO in steps 65 and 68 and after the processing in steps 66, 69 and 70, the process moves to step 61. In this way, the time-related data processing and display processing j are always performed without interruption except during the interrupt processing time period, which will be described later, and the time-related information T, TO, and T
R is sequentially displayed in the display area 184 of the display 180.
Information regarding distance is calculated and displayed according to the procedure shown in FIG.

This processing and processing related to speed and power, which will be described in detail later, are interrupt processing. In addition, the flow chart in Fig. 6 shows the traveling speed V1 average speed VA and the required average speed VNA.
It also includes calculation processing. Rotating transducer 15
A pulse is output from 1', and this pulse is sent to CPUl5O.
Upon receiving the request, the process shown in FIG. 6 starts. First, the count value n of the counter 157 is read, the travel speed is calculated using equation (9), and the result is stored in the storage location 213 (step 71). Then reset the counter 157 (
Step 72). From this point on, the counter 157 starts counting the output pulses of the frequency divider 156 again from zero. Next, 1km counters 235, 236 are used to add up the distance traveled.
Add 1.57 to the internal capacity 1 and m2 (step 73) (see equations (1) and (2)), and set the 1 km counter 2.
It is checked whether the internal capacity 1 of 35 has reached 1000 (step 74). If m1>1000, the process proceeds to step 75, increments the content DT of the storage location 211 by 1, subtracts 1000 from the content of the counter 235, and sets the subtraction result in the counter 235 (step 76). 1-If the content 1 of the counter 235 is less than 100, step 7
Proceed to step JMoV without processing steps 5 and 76.

In step JMoV, 1
It is checked whether the content 2 of the km counter 236 exceeds 1000, and if M2>1000, the content (1) of the storage location 219 is incremented by 1 (step 78), and the counter 236 is
1000 is subtracted from the content 2 of , and the subtraction result is set in the counter 236 (step 79). 1-counter 2
If the content of 36 is less than 1000, the process moves to step 83.

When the process of step 76 is completed, the process proceeds to step 80, where the target distance DS (memory location 228) and the traveling distance D
The remaining distance DR is calculated using equation (3) using O (storage location 219), and the result is stored in the storage location 227.

Furthermore, the average speed VA and required average speed VNA are calculated using equations (10) and (11) (step 8
1,82), proceed to step 83. In step 83, it is checked whether the input key 165 has been pressed, and if it has been pressed, the interrupt processing is terminated for input processing of various setting values, and the process returns to the processing step before the interruption (FIG. 5).

If the input key 165 is not pressed, which button is pressed for distance information display processing? Check whether the mode is set (steps 84, 88, 91). If mode 1 is set, the total travel distance DT is read from the storage location 211 and displayed on the display area 181 of the display 180 (step 85), and the total travel distance DT is set to the alarm setting constant value DTa.
(Step 86) DT>DT
If it is a, an alarm is sounded (step 87) and the interrupt processing is ended. If DT≦DTa, the state returns to the state before the interrupt without generating an alarm. When mode 2 is set, the mileage (1) is displayed in the display area 181 (
Step 89) Similarly, the mileage DO is the alarm setting value P.
Check whether it exceeds Oa (step 90), (
1) If it is DOa, an alarm is sounded (step 87).
If mode 3 is set, the remaining distance DR is displayed (step 92) and the process returns. If neither mode is set, the process returns to the step before the interrupt without any display. FIG. 7 shows a procedure for calculating information regarding power and displaying information regarding speed and power. This principle is based on the 0 output from the clock 153.
．． It starts with an interruption by a 5 second pulse Ps. When the 0j second pulse Ps is output and the CPU15O receives it, A-
Read the output of D converter 154 and store it in storage location 238
is added to the content 1M (step 101).

Then, it is checked whether the one-minute pulse Pm is outputted from the clock 153 (step 102), and if the one-minute pulse Pm is outputted, the process proceeds to step 103. Step 10
In 3, the mileage for 1 minute is calculated using equation (13),
Stored in storage location 243. Next, the contents of memory location 238 are divided by 120 to calculate an average current of 1 MA for one minute and stored in memory location 239 (step 104). and,
Using the traveling distance DdM calculated in steps 103 and 104 and the average current 1 MA, the power consumption rate PD is calculated by equation (12) and stored in the storage location 215 (step 10
5). This calculated power consumption rate PD is added to the content PMN of the storage location 240 (step 106), and
The number N of additions of 1 is incremented by 1 (step 107). After processing steps 106 and 107, storage locations 240 and 241
The average power consumption rate PDA is calculated by equation (14) using the added value PMN and the number of additions N (step 108).
), then the remaining power PR is calculated using equation (15) (step 109). Finally, the contents of memory location 238 are reset to obtain the cumulative current 1M for the next minute (step 110), and the distance traveled for the next minute DdM.
For the calculation, the sum of the current travel distance DT and 1 minus the content of the counter 1 is stored in the storage location 237 as the previous total travel distance DdB (step 111). The arithmetic processing of power-related information is thus completed and the process moves on to display processing, but before that, it is checked whether the input key 165 has been pressed (step 112) and if it has been pressed, the process returns to the processing step before the interruption. If there is no 1-minute pulse Pm(7) interrupt, the process moves from step 102 to step 113, the state of the input key 165 is checked, and if the input key 165 is not pressed, speed display processing is executed.

If the input key 165 is pressed, the process returns. The process of displaying information regarding speed starts by checking which mode is set (steps 114 and 118).
, 121). When mode 1 is set, the contents of the memory location 213 are read out and the display area 18 of the display 180 is read out.
2 (Step 115), this traveling speed is compared with the alarm setting value a (Step 16), and if >Va, an alarm is generated (Step 117). Then, return to the step before the interrupt. Returns also when V≦Va.
When mode 2 is set, the average speed VA is similarly displayed (step 119), and the average speed VA is the alarm set value V. It is checked whether it exceeds Aa (step 120), and if A>M, an alarm is generated (step 117). When mode 3 is set, the required average speed NA is displayed in the display area 182 (step 1).
22) End the interrupt process without sounding an alarm. If it is determined in step 112 that the input key 165 is not pressed, the process moves on to displaying information regarding power, but in this case as well, the set mode is checked (step 123,
127, 131), displays according to the set mode.

When mode 1 is set, the power consumption rate PD is read from the storage location 215 and displayed in the display area 18 of the display 180.
3 is displayed 124, it is checked whether the power consumption rate PD is below the alarm set value PDa (step 125), and if PD<PDa, an alarm is sounded (step 126). If NO in step 125 and after step 126 is completed, the process moves to step 115, which is a speed display process. In the case of mode 2, the average power consumption rate PDA is displayed (step 128), and the PDA
If it is DAa (step 129), an alarm is sounded (step 130). If NO in step 129 and after alarm processing, the process moves to step 119. If mode 3 is set, the remaining power PR is displayed (step 13).
2) If PR<PRa (step 133), an alarm is sounded (step 134), and the process then moves to step 122. If the answer in step 133 is NO, the process also moves to step 122. In the speed and power display processing, if neither mode is set, the interrupt processing is ended without displaying various information. In the above embodiment, the remaining time TR is obtained by subtracting time t from target time B, but target time! It can also be obtained by introducing a target time instead of Rrs and subtracting the elapsed time TO from this target time.

Further, the speed can be calculated by counting the number of output pulses of the rotary transducer 151 per unit time. In mode 3, alarm set values are not provided for the remaining distance DR and remaining time TR, but if necessary, alarm set values may be provided to sound an alarm.
Furthermore, although time information is displayed in units of 1 minute, it can be displayed in units of 1 second if necessary, and distance information can also be displayed in units of 1 minute.
Needless to say, it is possible to display up to 100rn or 10n1 (one or two decimal places if it is a unit of 1) instead of -. Moreover, many other examples of driving state information can be considered. The display can be used not only to display driving state information but also to display the results of four arithmetic operations using a numeric keypad and other displays. As described above in detail, according to the present invention, information regarding the traveling distance, traveling speed, electric power as a traveling energy source, and time of an electric vehicle can be displayed.

Moreover, this information can be displayed in three modes: a mode that displays the actual driving conditions, a mode that displays the amount measured from zero each time it is reset, and a mode that displays the calculation result with the preset amount. It is extremely convenient for driving an electric vehicle as it can display a large amount of display information and can display a large amount of information multiplexedly, allowing it to take up less display space. It becomes possible.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the contents of the travel information display device and data memory, Figure 2 is a diagram showing the input keys of the key input device, and Figure 3 is a waveform showing the output pulses of the rotary transducer and clock pulses. 4 are waveform diagrams showing the current detected by the current detector, and FIGS. 5 to 7 are flow charts showing the procedure of the calculation processing and display processing of driving information by the CPU. 150...Microprocessor, 151...
... Rotating transducer, 152 ... Current detector, 153 ... Clock, 160 ... Key input device, 161-163 ... Mode setting key, 17
0...Numeric keys 171-174...Item input keys, 180...Display, 181-184...
...Display area, 200...Data memory.

Claims (1)

[Scope of Claims] 1. In an electric vehicle equipped with a storage battery as a running energy source and a running drive motor driven by the electric power of the storage battery, a rotation transducer that detects the amount of rotation of a wheel, and a current flowing through the drive motor. a current detector that detects the current, a clock that measures time, a numerical input device that inputs necessary numerical information, a display that displays multiple items of driving status information, a first mode that displays information about the actual driving status, A mode setting device that sets either a second mode that displays information measured from zero each time it is reset, and a third mode that displays information that is associated with a numerical value input in advance by the numerical input device. , and each input signal from the rotary transducer, the current detector, and the clock, and the numerical information input from the numerical input device, calculate the running state information of the plurality of items described above, and set by the mode setting device. A driving information display device for an electric vehicle, comprising a microprocessor that displays driving state information on the display according to the mode. 2. The driving information display device for an electric vehicle according to claim 1, wherein the display displays driving status information regarding distance, speed, power, and time. 3. The travel information display device for an electric vehicle according to claim 1, wherein the display displays a travel distance per unit electric power. 4. The driving information display device for an electric vehicle according to claim 1, wherein the display device displays remaining power obtained by subtracting power consumption from the charging amount in the third mode. 5. The travel information display device for an electric vehicle according to claim 1, wherein the display device displays the remaining distance obtained by subtracting the travel distance from the target distance in the third mode. 6. The travel information display device for an electric vehicle according to claim 1, wherein the display device displays the target time or the remaining time obtained by subtracting the time or elapsed time from the target time in the third mode. 7 In the third mode, the display indicates that the remaining distance obtained by subtracting the mileage from the target distance is divided by the remaining time obtained by subtracting the time or elapsed time from the target time or target time. A travel information display device for an electric vehicle according to claim 1, which displays a required average speed. 8. Claim 1, wherein the numerical information inputted by the numerical input device includes an alarm setting value, and an alarm is issued when the content of the driving state information reaches this alarm setting value.
A driving information display device for an electric vehicle according to item 1.