JPS60104219A - Data recording device - Google Patents

Abstract

PURPOSE:To prevent an omission of a data and a malfunction by controlling an operating of an interface basing on a signal for showing an installed state of a recording device body and a memory cartridge. CONSTITUTION:An output of a converting circuit 1 is transferred to a controlling circuit 3 at every prescribed time limit through a counter 2. The circuit 3 inputs the contents of the counter 2 to a memory 5 through interfaces IF42, 43. A memory cartridge 7 is constituted of the IF42, the memory 5 and a timepiece 6, and its attached or detached state is detected by a switch SW1 and SW2, and a detecting circuit 9 connected to them. The circuit 9 receives a signal from the SW1 and SW2, and a signal from the controlling circuit 3, and outputs signals Q1-Q3 for showing an installed state between a recording device body and the cartridge 7. In this way, an operation of the controlling circuit 3 and the IF43 is controlled.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a data recording device that measures and records consumption data of electricity, gas, water, etc. at fixed time intervals, and later collects and analyzes the data. The present invention relates to a data recording device having a removable memory cartridge.

[Technical background of the invention]

FIG. 1 is a block diagram showing a schematic configuration of a conventional data recording device. To explain the configuration for measuring power consumption data, it consists of a conversion circuit that converts power into the number of pulses, and a conversion circuit that counts the number of output pulses from the conversion circuit L and outputs the contents of the counter at fixed time intervals and then clears the counter. A memory cartridge 7 that can be removed from the main body of the device to store the measured values of the counter circuit and collect the data, and a memory cartridge 7 that controls writing of data to the memory cartridge 7, clearing the counter circuit, etc. Patented Turn Eighth Circuit II/, which features a control circuit J for performing the operation, and signals between the main body of the device and the memory cartridge 7.
It consists of , invasion and.

Built into the memory cartridge 7 are a memory S for storing side measurement values, a clock 6 for notifying the control circuit J of a fixed time period, and a data input/output interface '12. The memory cartridge can be attached to and detached from the main body of the apparatus, and detection of attachment and detachment is performed using switch t.

That is, when the memory cartridge 7 is installed in the main body of the apparatus, the switch g is closed and the control circuit J detects the installation of the memory cartridge. Data is exchanged between the control circuit J and the memory 5 in the memory cartridge 7 only when the switch g is closed.

[Problems with background technology]

In a data recording device having such a configuration (hereinafter referred to as a loading device), the contents of the counter are stored in the memory cartridge 7 via the interface 'I/'12.
If you remove the memory cart 7 from the device while it is writing to the memory S in the device, data may be lost or other data may be destroyed due to malfunction. It has the following drawbacks.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a data recording device that controls the sequence of writing data to a memory in a memory cartridge to prevent data loss or malfunction.

[Summary of the invention]

In order to achieve the above object, the present invention includes a recording device main body and a memory cartridge removably attached to the main body, and the measurement data for each fixed time period is transmitted to the memory cartridge through an interface in the recording device main body. memory cartridge,
a first switch that opens and closes in response to attachment and detachment of the memory cartridge; and a second switch that opens and closes in response to locking and unlocking of the memory cartridge; A detection circuit is provided which inputs the opening/closing signals of the first and second switches and outputs a signal representing the installation state between the recording device main body and the memory cart 17, and based on the signal representing the installation state. The method is characterized in that the operation of the interface is controlled by the interface.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings. The same parts as shown in Figure 1 are designated by the same reference numerals.
The explanation will be omitted.

FIG. 2 is a block diagram showing an embodiment of the present invention,
This figure shows a configuration for measuring power usage data as in the case of FIG. 1. It is manually applied to the load voltage VL, load current, and melt conversion circuit l.

The conversion circuit l includes, for example, a multiplier that multiplies the load voltage v1 and the load current, and a %'F-;
cy conversion) and a frequency divider that converts the outputs of w and 7 converters to an appropriate ratio. The output of the conversion circuit I is transferred to the control circuit J at fixed time intervals via the carantaco. The control circuit J inputs the contents of the Kalantaco to the memory S via the input/output interfaces lI2 and '13. The memory cartridge (2) 7 is composed of an interface, a memory S, and a clock 6, and is removable from the main body of the road survey apparatus. The attachment/detachment state of the memory cartridge is detected by two switches sw, , sw and a detection circuit 9 connected thereto. The detection circuit 9 receives signals from the switches sw, , sw, and R8 from the control circuit J.
In response to the T signal, the control circuit 3 and the interface 1. The operation of t3 is controlled.

FIG. 3 is a circuit diagram showing an example of the configuration of the detection circuit 9 and the interface circuit tI3. Switch SW.

A cartridge detection switch detects the connection of the cartridge 7 to the main body, and opens and closes according to the attachment and detachment of the cartridge 7. In addition, switch SW is a lock switch that is manually operated after the cartridge is inserted, and is a switch that opens and closes in response to locking and unlocking of the memory cartridge 7.
0 to the set side of the Re flip-flop/co and the D terminal of the D flip-flop 13. The open/close signal of the switch SW is sent to D via the inverter gate//
At the same time as input to the clock terminal of flip-flop /3, inverter gate /l and inverter gate /
It is also input to the clock terminal of the D flip-flop/da via the y. Switch SW here.

and SW, respectively) The circuit shall be closed when the IJ edge 7 is installed and locked.

Output Q'+ of Ft8 flip-flop/L2, output Q2 of D flip-flop/3, D flip-flop/4
' outputs Q, are respectively input to the control circuit J.

The output Q2 is also used as a control signal for the tri-stays (G) /A and /Ao of the interface circuit q3. The output signal Q of the D flip-flop/Hiro forms the unlock signal. In addition, the R8T signal from the control circuit J is input to the reset terminals of the flip-flops /2, /, 3, /lI.The control circuit J (not shown) is composed of a microprocessor and a ROM containing a program. , the memory 5 in the memory cartridge 7 is composed of an address selector circuit and an IC memory circuit. Note that the memory cartridge 7 has a built-in battery (not shown), and the contents of the memory 5 and the timer 6 may change even if the memory cartridge is separated from the main body.
It never stops working.

The memory cartridge 7 has a structure that allows it to be separated from the main body of the load survey apparatus when collecting data. When the memory cartridge and shifter are installed, the clock 6 outputs a signal to the control circuit J via the ink face circuit 3 at regular time intervals. At this time, the control circuit J reads the contents of the Kalantaco, writes the data into the memory S, and clears the Kalantaco.

Next, the operation when attaching and detaching the memory cartridge 7 will be explained using the timing chart shown in FIG. The switch SW is a microswitch that detects the insertion of the cartridge, and when inserted, the switch automatically closes and the output of the flip-flop/2 becomes Q+h'μ. In this state, signals /A and /An of the interface circuit q3 are in a high impedance state, so that signals cannot be exchanged between the memory cartridge 7 and the control circuit J.

Then, the switch w is locked by the operator's hand. At this time, the D input of flip-flop 13 is switch 8W.
Since it is already set to ゝ/“ by 1, the switch S
When W, is closed, its output Q, becomes % t l/. The output Q is used as a control signal for the dry state gate /A, and since the gate /A becomes conductive, signals can be exchanged between the control circuit J and the memory cartridge 7. That is, after the switch SW is closed, the control circuit 3 can perform the data recording operation. Conversely, when removing the memory cartridge, the lock/unlock switch sw2 is first opened. At this time, the output of goo)/& changes from 10' to "/". And the D power of flip-flop/q is 1μ (=
Q+) is output, so the output Q3 becomes 1/''. That is, the output of the flip-flop /9.3 detects that the lock/unlock switch 8w is open, and the control circuit J
inform this. At this time, the control circuit J writes the contents of the kakunta (DATA1 in FIG. S), the end time, and the end mark into the memory 5, as shown in FIG.

Furthermore, after the writing is completed, the control circuit J generates the R8T signal and switches the flip-flops /, 2, /3, IQ-
Reset. After the reset, the output /2 becomes 10', so that the output /A of the interface circuit 13 becomes high impedance, making it impossible to exchange signals between the control circuit J and the memory cartridge 7.

Subsequently, since the memory cartridge 7 is removed, the switch SW is opened. Since the operation of releasing the lock switch SW and removing the memory cartridge 7 is performed manually, it takes /θ0 to 200me at the earliest.

On the other hand, since the time for Qs-7 (soaking operation at the end) is around 10rne at the longest, it is possible to write from the time when switch SW is opened until the time when switch SW is opened. be.

〔Effect of the invention〕

As explained above, in this invention, the gate of the interface circuit is formed based on the opening/closing signal generated from the switch that closes the gate in response to the attachment or detachment of the memory cartridge, and the switch that opens and closes the gate in response to the locking/unlocking of the memory cartridge. By controlling using the received signal, it is possible to prevent instability of the noise signal and malfunction caused by attaching and detaching the cartridge. In addition, there is a time delay between opening and closing the switch, and using this time delay, the final data (DA, TA:
L), end time, and end mark can be written into memory. Therefore, the next time a new memory cartridge is inserted and data is recorded and retrieved, there will be no time gaps or data discontinuities, improving the reliability of the data. In addition, since an end mark is written in the memory, it is a data delimiter (in other words, if the memory cartridge has a large capacity, even if this memory cartridge is attached to another load survey device and continuous recording is performed, the end mark will not be displayed). This is because the unit of recording becomes clear.

Furthermore, in this invention, the memory cartridge is not removed during the wandering operation, so
There is no need to worry about data being lost or incorrect data being written. Therefore, accurate data collection is possible. Note that the present invention can be applied not only to road survey devices but also to other data recording devices to which a memory cartridge can be removably attached, and similar effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional data recording device, FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a specific circuit example of the detection circuit and interface used in the present invention. FIG. 5 is a timing chart for explaining the operation of the circuit shown in FIG. 3, and FIG. 5 is a diagram showing the contents stored in the memory in the memory cartridge. J...Control circuit, 5...Memory, 6...Clock, 7
...Memory cartridge, W...Detection circuit, Q2
, 9J...ink face circuit, BW,... attachment/detachment detection switch, 8W2... lock/unlock switch. Applicant's agent: Inomata

Claims (1)

[Claims] A data recording device that has a recording device main body and a memory cartridge that is removably attached to the main body, and stores measurement data for each fixed time period in a memory in the memory cartridge via an interface in the recording device main body. , a first switch that opens and closes in response to attachment and detachment of the memory cartridge; and a lock/lock for the memory cartridge.
a first switch that opens and closes in response to unlocking, and a detection circuit that inputs opening and closing signals of the first and second switches and outputs a signal indicating the installation state between the recording device main body and the memory cartridge. A data recording device characterized in that the operation of the interface is controlled based on a signal representing the attachment state.