JPH0632513B2 - Data transmission / reception system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a data transmission / reception system that transmits and receives data between an interrogator and a plurality of responders using radio waves.

[Conventional technology]

FIG. 6 is a block diagram showing a conventional example of a data transmission / reception system. Here, 1 is an interrogator, 2 is a responder, 3 is an external controller such as a personal computer (personal computer),
It is assumed that the interrogator 1 and the responder 2 have a spatial positional relationship capable of wirelessly transmitting and receiving each other. Although only one transponder 2 is provided here, it is assumed that a plurality of transponders 2 are arranged.

The interrogator 1 is a microcomputer (hereinafter, simply referred to as a microcomputer) 10 including a memory, an input / output port, a timer, etc., a transceiving circuit 11 for wirelessly transmitting and receiving with the responder 2, and a display for displaying the state of the interrogator 1. It is composed of an interface circuit 13 for controlling the interface with the outside including the circuit 12 and the external controller 3. The responder 2 receives a command or data transmitted from the interrogator 1, a one-chip microcomputer 20 having a non-volatile memory, an input / output port, a timer, etc. It is composed of a transmission circuit 22 for transmitting, a battery 23 for supplying driving power to the microcomputer 20, etc. without being supplied with power from the outside. Then, normally, by issuing an interrogation signal from the interrogator 1, predetermined data is collected from the responder 2, and is processed as it is or appropriately and passed to the personal computer 3.
The responder 2 can also transmit data to the interrogator 1 if necessary.

[Problems to be solved by the invention]

In the system as described above, the external controller 3, which is a higher-level controller, is the center of control, and the interrogator 1 merely plays a role of relaying data between the responder 2 and the external controller 3. It's just done. That is, the interrogator 1 has a responder 2
Since there is no function to create data for control using the data from the computer, it is necessary to support an external control device 3 such as a personal computer, and as a result, not only the system configuration scale increases but also the external controller There is a problem that the communication time between the interrogator and the interrogator increases, and the responsiveness deteriorates.

Therefore, an object of the present invention is to provide a data transmission / reception system having a good response by shortening the response time from the reading of data to the output of a control signal without increasing the system scale.

[Means for solving problems]

Data writing means for writing at least the data received from the interrogator to the memory in which the data (write data) obtained as it is or a predetermined logical process is stored in each of the plurality of responders, and the interrogator from the interrogator A read data creating means for reading data from the memory in response to the interrogation signal and creating read data is provided, and the interrogator has a trigger circuit for receiving at least a trigger signal from the outside, and the trigger signal is a predetermined trigger comparison signal. A trigger match determination circuit that detects a match, and sends write data or requests read data to the responder at least once each time the trigger match determination circuit detects a match, while receiving from the responder Control data creating means for creating control data by subjecting the read data thus processed to the same or a predetermined logical process Provided an output circuit for outputting the control data to the outside.

[Action]

While the read data creation means is provided in the responder, the trigger match determination circuit is provided in the interrogator, and when an external trigger signal that matches the trigger comparison signal is detected, write data is sent to the responder or read data is requested. By making it possible to easily use the output signals of various detectors for timing control of data reading and writing by providing a function to receive the read data, a control data creating means is provided and the read data is kept as it is.ゝ or predetermined logic processing is performed so that the data can be output to the control data output circuit. For example, it is possible to easily control the external device to be turned on or off according to the size of the read data, or to output the data to the numerical display. It can be so.

〔Example〕

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. As is clear from the figure, this embodiment is different from the conventional example shown in FIG. 6 in that the interrogator 1 includes a trigger circuit 14 for detecting an external trigger signal from an external control device or a detector, and a microcomputer 10. Of the trigger comparison signal and the output signal of the trigger circuit 14 to determine whether or not there is a match, and the microcomputer 10
The feature is that a control data output circuit 16 for outputting the control data from the outside is added. Although not shown in the figure, the response device 2 is also characterized in that a read data creating means as described later is added.

Hereinafter, these differences will be mainly described.

FIG. 2 is a timing chart for explaining the operation of the present invention. That is, the external trigger signal TEX which is an output of an external control device or the like is input to the trigger circuit 14 in the interrogator 1. In addition, this external trigger signal TEX
Assume that the data contents are updated at the timings TEX1 and TEX2. The trigger comparison signal TR output from the microcomputer 10 is updated at the timing TR1. Judgment signal S
J is an output of the trigger coincidence determination circuit 15, which is at “H” (or “L”) level when the external trigger signal TEX and the trigger comparison signal TR are coincident with each other, and is “L” when they are not coincident with each other.
(Or “H”) level. When the microcomputer 10 detects the "H" level determination signal SJ, it issues a read data request to the responder 2 at the timing CALL1. On the other hand, the responder 2 receives the read data request at the timing ANS1 and transmits the read data according to the request content to the interrogator 1 at the timing ANS2. The interrogator 1 receives the read data at the timing CALL2. The interrogator 1 creates control data by directly or logically processing the read data as necessary, and outputs the output content of the control data output circuit 16 to the timing DAT as necessary.
Update with A1.

FIG. 3 shows an example of a format of read data created by the transponder 2. As shown in the figure, the read data is the command C1 and a plurality of comparison data DA1, DA2, here.
..., composed of DAN.

FIG. 4 shows a data format for creating control data corresponding to the read data shown in FIG. This data is command C2, control specification CSP, comparison data DRB,
Output data DOUT and control data DATA
Etc. Here, the control specification CSP includes data for indicating a method of creating control data. For example, the comparison data DA of FIG.
This is a logical process for determining the output data DOUT as the control data DATA or the comparison data DA2 as it is as the control data DATA when 1 and the comparison data DRB of FIG. 4 match. There are various possible methods and data for determining the control data DATA.
Of course, it is not limited to the above.

FIG. 5 is a flow chart for explaining the operation (for creating control data) of the interrogator shown in FIG.

In the figure, when the microcomputer 10 in the interrogator 1 detects in step that the determination signal SJ, which is the output of the trigger coincidence determination circuit 15, is at "H" level, it goes to step "L" level. When it is detected, the process proceeds to step. In step, the microcomputer 10 requests read data from the responder 2 via the transmission / reception circuit 11. Next, the process proceeds to the step. If the read data shown in FIG. 3 is successfully received from the responder 2, the process proceeds to the step. If the read data fails, the process proceeds to the step. At the step, the microcomputer 10 determines from the data format for creating the control data as shown in FIG. 4 and the read data as shown in FIG.
The control data is created (the microcomputer 10 performs the logical processing according to the contents of the control specification CSP in FIG. 4 to create the control data).
If necessary, the control data obtained in the next step is updated as new control data, and the process proceeds to the next step. In step, the microcomputer 10 outputs the control data to the outside through the control data output circuit 16.

〔The invention's effect〕

According to the present invention, while the read data creating means is provided in the responder, the trigger match determination circuit is provided in the interrogator, and when the external trigger signal matching the trigger comparison signal is detected, the write data is transmitted to the responder. Since it has a function of requesting and receiving read data, it becomes possible to easily use the output signals of various detectors for timing control of read and write operations of the interrogator, and Since the control data output circuit is provided in the response device and the read data can be output to the control data output circuit by performing a predetermined logical processing, for example, the external device is turned on or off depending on the size of the read data of the responder. ,
A control function such as outputting data to a numerical display can be realized without the assistance of an external control device, and the system configuration can be simplified in size and can be inexpensive.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention, and FIG.
FIG. 4 is a timing chart for explaining the operation, FIG. 3 is a block diagram showing a format example of read data used in the present invention, and FIG. 4 is a data format for creating control data corresponding to the read data in FIG. FIG. 5 is a flow chart for explaining the operation of the interrogator shown in FIG. 1, and FIG. 6 is a system configuration diagram showing a conventional example of a data transmission / reception system. Explanation of symbols 1 ... interrogator, 2 ... responder, 3 ... external controller (personal computer), 10,20 ... microcomputer (microcomputer), 11 ... transmission / reception circuit, 12 ... display circuit, 13 ...
... interface circuit, 14 ... trigger circuit, 15 ...
Trigger coincidence determination circuit, 16 ... Control data output circuit, 21 ... Reception circuit, 22 ... Transmission circuit, 23 ...
battery.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04L 29/08

Claims (2)

[Claims] 1. A data transmission / reception system for mutually transmitting and receiving data between an interrogator and a plurality of transponders by radio waves, wherein at least each of the transponders receives at least the data received from the interrogator. Data writing means for writing the data (write data) obtained by the logical processing of (1) to a built-in memory, and read data creating means for reading the data from the memory in response to an interrogation signal from the interrogator and creating read data. And a trigger circuit that receives at least an external trigger signal in the interrogator, and a trigger matching determination circuit that detects that the trigger signal matches a predetermined trigger comparison signal,
Each time the trigger match determination circuit detects a match, the write data is transmitted or the read data is requested to the transponder at least once, and the read data received from the transponder is kept as it is or at a predetermined level. A data transmission / reception system comprising: a control data creating means for performing a logical process to create control data; and an output circuit for outputting the control data to the outside. 2. The data transmission / reception system according to claim 1, wherein at least one type of control specification data indicating a method for creating control data is stored in the interrogator, and the trigger coincidence determination circuit A data transmission / reception system, wherein control data is created by the control data creation means based on the control specification data each time a match is detected.