JPS62173896A - Automatic measuring instrument - Google Patents

Abstract

PURPOSE:To eliminate the need for transmitting command data on a measuring action one by one from a controller side by storing the prescribed measuring action program in transmission and reception units which exchange an object to be measured and a signal. CONSTITUTION:By a signal from the side of a controller 20 program data on transmission and reception actions is previously stored in the memory 34 of the transmission unit 26 and the memory 44 to the reception unit 27, respectively. When a test address is added from an I/O port 2, the command data previously stored in the memories 34 and 44 is sequentially read out, and inputted to a transmission unit controller 31 and a reception unit controller 40 through switches 2 and 4, respectively. Thus a transmission part 32 and a reception part 42 act to automatically execute the prescribed measuring actions.

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an automatic control device, and more specifically, the present invention relates to an automatic control device that controls the operation of a plurality of measuring instruments connected to a bus according to commands from a controller. This relates to a measuring device.

[Technical Background of the Invention] When comprehensively measuring various characteristics of an object to be measured, several measuring instruments are generally prepared depending on the measurement items, and these measurements are carried out via a bus. The operation of the device is controlled by a controller, an example of which is shown in FIG.

In other words, controller 1 has GP-IB (IEEE
For example, three measuring units 3 to 5 are connected via a standard bus 2 called -3t d 488), and these measuring units and the object 2111j are connected by signal lines 7 to 9, respectively. There is.

In this conventional example, the controller 1 first issues an address signal specifying one of the measurement units 1-3 to 5, and after confirming that communication is possible with the measurement unit that received the address signal, It transmits measurement operation control data to that unit, or receives measurement data from that unit. The controller 1, bus 2, and measurement units are connected by one type of connector.

Up to 15 controllers and measurement units can be connected in parallel to bus 2.

Also, in FIG. 4, for example, there are three I/Os on the controller 1 side.
10 ports 1o to 12 are provided, and these I10 ports and each measurement unit are connected to parallel buses 13 to 1, respectively.
An example is shown in which connection is made with 5. In this case, since the controller 1-1 transmits and receives data using the I10 ports 10 to 12 as addresses corresponding to each measurement unit, it requires as many I10 ports as the number of measurement units.

In general, 0P-
In the IB type device, there is less complexity in terms of hardware on the controller or measurement unit side. However, as seen from the above two examples, controller 1
Since data is transmitted according to a preset program according to the operation step of each measurement unit, the functional burden is heavy, and especially in GP-IB method 1, code conversion of transmitted and received data is involved, so the overall The measurement time tends to be long. It is possible to reduce the burden by adding more controllers, but in this case, it becomes necessary to upgrade the host computer (not shown) that controls the controller 1 to a higher-level one.'! This complicates the A placement and is also unfavorable in terms of cost.

[Object of the Invention] This invention has been made in view of the above points, and its object is to provide a control circuit for causing the measurement unit to perform a predetermined operation, and to connect I10 ports 1 to 1 provided on the controller side.
The object of the present invention is to realize a relatively simple and efficient automatic measuring device in which the control circuit is driven by the output from the device.

[Embodiments] The present invention will now be described in detail with reference to embodiments shown in the accompanying drawings.

Referring to FIG. 1, this automatic measuring device includes, for example, a controller 20 comprising a set of four I10 boats 1 to 4 each having a different assigned function;
A transmitting unit 26 and a receiving unit 2 connected to the buses 1 to 1 through buses 21 to 23 and wiring 24, 25, etc.
7 and a measuring device 28. This measuring device 28 can be connected in parallel to the above-mentioned buses and wiring as many as necessary depending on the number of fixed items, but only one of them is shown in FIG. is omitted.

The controller 20 includes, for example, a microcomputer (not shown), and sends out predetermined signals from the four I10 bauds 1 to 1 in accordance with their assigned functions in order to communicate with the specified measuring device 28. Above 7
11! ill sent from the I-status 28 side! It is designed to perform arithmetic processing on I constant data.

The transmitting unit 26 on the side of the measuring device 28 includes a transmitting unit 3 including a transmitting unit controller 31 that sets functions such as changing the range of the measurement signal applied to the object to be measured 30, for example.
2, and an address setter 33 that holds a unique number given to this transmitting unit 26 to distinguish it from transmitting units of other measuring instruments (not shown). and a memory 34 in which the transmission operation program of the transmission section 32 is written, and
A comparator 35 that compares the unit address signal manually inputted from the 0 baud 1-1 with the output of the address setter 33, and when both match, controls the switches 1 and 2 to enable writing or reading from the memory 33. etc.

The receiving unit 27 on the llt+ meter 28 side includes, for example, a receiving unit controller 40 for function setting,
It has a receiving section 42 including an A/D converter 41 that digitally converts the signal input from the above-mentioned nI meter 30. Further, as in the case of the above-mentioned transmitting unit 26,
An address setter 43 that holds a unique number given to this receiving unit 27, a memory 44 in which the operation of the receiving section 42 is written, and a unit address signal inputted from the I10 port 1 to the address setter 43.
When the two match, the three switches 3
The comparator 45 and the like are provided to control the memory 44 to write or read data by controlling the memory 44.

Next, to explain the operation of each part, in this embodiment,
The memory 34 of the transmitting unit 26 and the receiving unit 27
The program data for the transmit operation and the receive operation are written in advance in the memory 44 by signals from the controller I-roller 20 side, and during actual measurement, the transmit unit 26 and the receive unit 27 read data from their respective memories. It reads data and performs transmission and reception operations.

That is, at the stage of writing the operation program to the memories 34 and 44, a test trigger signal for deactivating the transmitting section 32 and the receiving section 42 is issued from the I10 port 4 according to a command from the controller 1-roller 20. is,
It is applied to the transmitting unit 1 to the controller 31 and the receiving unit controller 40 via the wiring 24, and further a unit address signal is issued from the I10 boat 1. In the transmitting unit 26, the number signal of the transmitting unit 26 sent from the address setter 33 and the unit address signal inputted via the bus 21 are compared in the comparator 35, and if both signals match, the comparator A write signal is sent from 35 via wiring W/R. As a result, the memory 34 is put into a writing state, and the switch 1 is controlled to be on and the switch 2 is controlled to be off. Then I1
A test address signal is issued from 0 port 2, and bus 2
2 to the memory 34. In the memory 34, each address is sequentially activated by this test address signal, and in synchronization with this, command data for a transmission operation is issued from the I10 boat 3, and the bus 23 and switch 1 are activated.
The information is manually input to the memory 34 via the . As a result, command data for the transmission operation is sequentially written into the memory 34.

Writing is also performed in the memory 44 of the receiving unit 27 in substantially the same manner as described above. In other words, the unit address signal issued from the I10 boat 1 and the address setter 4
The comparator 45 compares the number signal of the receiving unit 27 sent from the receiving unit 3, and if the two signals match, a write signal is sent from the comparator 45 via the wiring W/R. The memory 44 is put into a writing state, and the switch 3 is turned on and the switches 4 and 5 are turned off. Next, a test address signal is sent from the I10 boat 2 and each address in the memory 44 is activated, and command data for a receive operation sent from the I10 boat 3 is sent to the memory 44 via the bus 23 and the switch 3.
and the data is written.

In addition, to supplement the actual writing example, for example, I10
Test address 1 response signal for transmitting unit from boat 2
1'', and sends command data such as function settings to be performed by the transmission unit controller 31 from the I10 port 3 and records it at address 1 of the memory 34. Next, the des1-address signal "1" for the receiving unit 1- is sent, and the receiving unit controller 40 sends command data such as function settings to be performed in response to the operation of the transmitting unit controller 31 to the I10 port 3. Send from. Hereinafter, in this manner, the transmission operation and the corresponding reception operation are sequentially recorded in each memory from address 1 to address n.

When the memory writing is completed, a test trigger signal for activating the transmitting unit controller 31 and the receiving unit controller 40 is sent from the I10 boat 4, and is also sent to the A/D converter 41 of the receiving section 41 via the wiring 25. Te A/D
Issues an I-Riga signal.

This enables the transmitting unit 26 and the receiving unit 27 to transmit and receive signals.

Next, the operation during measurement will be briefly explained. Engineering/○ Po 1
When the unit address signal from -1 matches the number of this sending and receiving unit 26, 27, the comparator 35,
A read signal is sent from 45 through the wiring W/R, and the on/off states of the switches 1 to 5 are reversed to the write state. That is, transmitting unit l-26
In the receiving unit 27, switch 1 is off and switch 2 is on, and in the receiving unit 27, switch 3 is off and switches 4 and 5 are on.

Therefore, when test address signals are applied from I10 boat 2 as No. 1, No. 2, etc., two memories 34
The command data written in advance in and 44 is read out sequentially from address 1 and sent to the transmitting unit controller 31 and the receiving unit controller 40 via switches 2 and 4, respectively.
is input. As a result, the transmitter 32 and the receiver 42 are activated and automatically perform a predetermined measurement operation. In this case, the analog measurement data obtained via the device under test 30 is A
After being digitally converted by the /D converter 41.

The measured data is taken into the controller 2o via the switch 5, the bus 23, and the I10 port 3, and is subjected to arithmetic processing.

Incidentally, FIG. 2 shows a flow diagram of the preparation work for writing data into each memory of the transmitting and receiving units and the control procedure of the actual measurement operation. For convenience, this figure shows an example in which the steps proceed in series; however, depending on the operation steps, they may be expressed in parallel or in an integrated manner.

[Effects of the Invention] As described above in detail, the automatic measuring device according to the present invention has a transmitting unit that applies a measurement signal to an object to be measured, and a receiving unit that receives an output from the object to be measured, respectively. It has a memory in which an operating program is written in advance.

The contents of this memory are written in advance by command signals from a controller equipped with multiple work/○ ports with different assigned functions, and during actual measurement, the transmitting unit and receiving unit are The data is read out and measurements are taken automatically.

Therefore, according to the present invention, there is no need to send measurement operation command data sequentially from the controller side to the measuring instrument side during actual measurement, and the communication time between the two is significantly shortened. You can speed up time. Furthermore, since the functional burden on the controller side is reduced, it becomes possible to perform arithmetic processing on many types of measurement data in a short time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an automatic measuring device according to the present invention.
FIG. 2 is a flow chart 1 to FIG. 4, and FIGS. 3 and 4 are block diagrams showing the conventional apparatus. In the figure, 20 is a controller, 26 is a transmitting unit, 27
28 is a receiving unit, 28 is a measuring device, 33°43 is an address setter, 34.44 is a memory, and 35°45 is a comparator.

Claims (1)

[Scope of Claims] An automatic measuring device comprising a controller and a plurality of measuring units operated by control signals from the controller, and having the controller process the measurement data of the measuring units, the measuring device comprising: The section includes a memory in which program data for measurement operations is written in advance in accordance with the control signal, and the data is read out during measurement, and a signal for writing to or reading from the measurement section is detected from among the control signals. Address discrimination means, and switching means for selectively applying the write or read signal to the memory based on the output from the address discrimination means, and for sending measured data to the controller during measurement operation. An automatic measuring device featuring: