JPH0529852B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a phase synchronized multi-pen recorder, and more particularly, to an improvement in recording operation in phase synchronized mode.

<Prior art> A type of multi-pen recorder uses multiple recording pens installed along the feeding direction of recording paper to simultaneously record analog input signals of multiple channels. A phase configured to correct the mechanical deviation of each recording pen with respect to the reference recording pen by appropriately delaying the input signal of the recording pen located downstream in the paper feeding direction in synchronization with the recording paper feeding speed. There is a synchronous multi-pen recorder.

FIG. 4 is a conceptual diagram showing an example of such a multi-pen recorder. In the figure, a recording paper 1 is wound around a part of the platen 2 and is fed one step at a time in the direction shown by the arrow, for example, by a pulse motor. Recording pens P1 to P8 are arranged radially around the outer periphery of the platen 2 along the feeding direction of the recording paper 1 so as to record on the recording paper 1.

In such a configuration, when recording in the phase synchronization mode, the recording pen P8 located most upstream in the feeding direction of the recording paper 1 is used as a reference recording pen, and the recording paper 1 The input signals of the recording pens P1 to P7 located on the downstream side in the feeding direction are appropriately delayed so as to synchronize with the recording paper feeding speed and correct the mechanical deviation of each of the recording pens P1 to P7 with respect to the reference recording pen P8. let That is,
For example, the recording pen P8 located at the most downstream position in the feeding direction of the recording paper 1 has an output delay of 7 pen phases relative to the reference recording pen P1, and in the case of a commercially available 8-pen type multi-pen recorder. The delay time of such 7 pens in is about 17 when the recording paper feed speed is set to 100 mm/min.
It's becoming a second.

By the way, in general, it is not so common to perform measurement recording using all the recording pens of a multi-pen recorder. When recording using some of the recording pens, the recording pens are often used in order from P1, P2, etc., starting from the recording pen located on the near side when viewed from the front.

<Problems to be Solved by the Invention> However, in the conventional multi-pen recorder, the reference recording pen for phase synchronization mode recording was fixed to the recording pen furthest upstream in the recording paper feed from the design stage (the third In the case of a figure, recording pen P
8). For this reason, for example, when recording in phase synchronization mode using the recording pens P1 to P3 in the multi-pen recorder shown in FIG. If the speed is set to 100 mm/min as shown in the figure, there will be a time delay of approximately 12 seconds between measuring and recording the analog input signal, and only the preset reference recording pen P8 can perform real-time recording. There is a drawback that there is no

The present invention has focused on these points, and its purpose is to provide a phase-synchronized multi-pen recorder in which the reference recording pen in phase-synchronized mode recording can be changed as appropriate.

<Means for Solving the Problems> The phase-synchronized multi-pen recorder of the present invention is capable of simultaneously recording analog input signals of multiple channels using a plurality of recording pens provided along the feeding direction of recording paper. By appropriately delaying the input signal of the recording pen located downstream of the reference recording pen in the recording paper feeding direction in synchronization with the recording paper feeding speed, the mechanical deviation of each recording pen with respect to the reference recording pen is reduced. In a phase-synchronized multi-pen recorder for correction, it is provided for each recording pen system, stores the input signal of each system sequentially according to the recording paper feed step, and corrects the mechanical deviation of each recording pen with respect to the reference recording pen. a plurality of buffer memories that output data by giving a delay time of The present invention is characterized by being provided with control means for individually variably setting.

<Operation> In the present invention, the relative positional relationship between the writing position of the latest data to the buffer memory and the reading position of recorded data from this buffer memory is variably set, and the reference recording pen for phase synchronization mode recording operates in phase synchronization mode recording. It is set to the most upstream recording pen in the recording paper feeding direction among the plurality of recording pens currently in use, or to any recording pen desired by the operator.

<Example> Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is an explanatory diagram of the configuration of a buffer memory BM used during a recording operation in phase synchronization mode of the present invention. The input signals of each recording pen that require phase correction during the phase synchronization mode recording operation are stored in the buffer memory BM in sequence according to the recording paper feeding step. That is, for example, the latest measurement data is stored at the first address of the buffer memory BM, the measurement data from one step before the recording paper feed step is stored at the next address, and the recording paper corresponding to the phase difference with the reference recording pen is stored at the next address. The measurement data from n steps before the feed step will be stored at the nth address at the end of the buffer memory BM, and the capacity of the buffer memory BM is the same as that of the reference recording pen and the recording pen to be subjected to phase correction. It is set to an appropriate value depending on the phase difference step. Here, as shown in FIG. 2, by writing the latest measurement data from the first address 0 and reading the measurement data from the nth address, n
A stepped phase difference will be applied.

Specifically, it is assumed that the reference recording pen in phase synchronization mode recording is the recording pen currently performing measurement recording and is located at the most upstream position in the recording paper feeding direction. For example, in the multi-pen recorder shown in Fig. 4,
When measuring and recording with four recording pens P1 to P4, recording pen P4 is used as the reference recording pen, and when measuring and recording with three recording pens P3 to P5, recording pen P5 is used as the reference recording pen. shall be. Such setting of the reference recording pen can be realized by referring to the measurement mode setting value provided for each recording pen and determining the maximum pen number of the recording pen during the measurement recording operation. Such processing is performed when the phase synchronization mode switch is turned on and when recording paper feeding is started in a state where the phase synchronization mode is set.

Then, buffer memory corresponding to each recording pen is created according to the reference recording pen that is variably set in this way.
The capacitance of BM is changed, and the write and read positions of measurement data are also changed. FIG. 3 is an explanatory diagram of control of such a buffer memory BM. The control unit CTL stores buffer memory BM corresponding to each recording pen according to the set standard recording pen.
Change the buffer start position, buffer end position, measured data write position, and measured data read position to appropriate values. In FIG. 3, if the phase correction amount of the recording pen 1 is 240 steps, for example, address 0 is specified as the buffer start position of the buffer memory BM, and 239 is the buffer end position.
Specify the address and set the measurement data read position along the data read and write directions with the buffer memory BM's buffer start position and buffer end position touching in a ring shape as the measurement data write position and measurement data read position. Specify to be located one step before the write position.

In such a configuration, when the phase synchronization mode switch is turned on or when recording paper feeding starts with the phase synchronization mode set, the control unit CTL controls the buffer memory BM as shown in Figure 3. Create various control data necessary for In the case of Figure 3, buffer memory
After storing the latest measurement data from address 0 to address 239 of BM, the measurement data is sequentially written from address 0 and the stored measurement data is read from address 239. As a result, the recording pen 1 is given a phase correction amount of 240 steps relative to the reference recording pen.

Although Fig. 3 shows an example in which the buffer area for phase correction of each pen in the buffer memory BM is variable, the buffer area for phase correction of each pen is fixed to the number of data n for each pen. Then, the phase difference is m (<n) according to the fluctuation of the reference recording pen.
If the number of steps has reached m, the readout position of the stored data may be moved to a position corresponding to m steps.

Furthermore, the setting of the reference recording pen is not limited to automatic selection, and may be manual setting. For example, if all 8 pens in Figure 4 are in recording operation, 4 pens P
4 may be designated as the reference recording pen. In this case, the recording pen P5 performs measurement recording on the upstream side of the recording paper feeding direction than the reference recording pen P4.
~P8 are recording pens P1 to P3 that perform real-time recording in the same way as recording pen P4, and perform measurement recording on the downstream side of the recording paper feeding direction than reference recording pen P4.
will record in phase correction mode.

Furthermore, by allowing the user to select between the conventional fixed reference recording pen method and the variable reference recording pen method of the present invention as required, it is possible to obtain the feel of a conventional recording operation.

<Effects of the Invention> As explained above, according to the present invention, it is possible to realize a phase-synchronized multi-pen recorder in which the reference recording pen in phase-synchronized mode recording can be changed as appropriate.
The practical effects are significant.

[Brief explanation of drawings]

1 and 2 are configuration explanatory diagrams of a buffer memory used during recording operation in phase synchronization mode of the present invention, FIG. 3 is an explanatory diagram of control of the buffer memory in the present invention, and FIG. 4 is a configuration diagram showing an example of a multi-pen recorder. It is a diagram. 1...recording paper, 2...platen, BM...buffer memory, CTL...control unit.

Claims (1)

[Claims] 1. When simultaneously recording analog input signals of multiple channels with a plurality of recording pens provided along the recording paper feeding direction, a recording paper feeding direction that is smaller than that of a reference recording pen is used. In a phase-synchronized multi-pen recorder that corrects the mechanical deviation of each recording pen with respect to the reference recording pen by appropriately delaying the input signal of the recording pen located downstream of the recording paper in synchronization with the recording paper feed speed, each recording pen A plurality of buffer memories are provided for each system and sequentially store the input signals of each system according to the recording paper feeding step, and output them after giving a delay time to correct the mechanical deviation of each recording pen with respect to the reference recording pen. , control means for individually variably setting the relative positional relationship between the writing position of the latest data to these buffer memories and the reading position of recorded data from these buffer memories in accordance with a variably set reference recording pen. A phase synchronized multi-pen recorder featuring: