JP3101358U - Load measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate management and setting of measurement data.
SOLUTION: This load measuring device is connected to a load cell arranged in a load measuring object and processes load measurement data by the load cell. A panel unit 10 including an operation unit 12 and a display unit 11; a flash memory driver unit 13 in which a removable flash memory 30 is mounted via a slot 13a; processing of load measurement data, operation detection and display control processing of the panel unit; A main processing unit that controls reading and writing of data from and to the flash memory mounted on the flash memory driver unit; Data relating to the load measurement result and measurement condition setting data are stored in the removable flash memory 30.
[Selection diagram] Fig. 1

Description

  The present invention relates to a load measuring device using a load cell, in which a method of recording measurement data and the like is improved.

  A load measuring device using a load cell is used in various fields. For example, in a press machine for component press-fitting, a load cell is attached to a predetermined position of a press pusher, a change in load applied to the press pusher at the time of component press-fitting press is measured, and this is used to determine the quality of press working (component press-fitting condition). That is being done. In this case, conventionally, the measurement data measured by the load measuring device is printed on paper by a printer. The user reads the measurement data printed on the paper, and judges the quality of the press working, or manually inputs the measurement data to a personal computer or the like by operating a keyboard so that the data can be used for processing on the personal computer or the like. I have. Conventionally, when setting and inputting desired measurement conditions and the like, conventionally, the setting and input are exclusively performed by appropriately operating an operator provided on a panel unit of the load measuring device.

The conventional method of printing measured data on paper with a printer as in the past requires laborious input when trying to use the measured data on another personal computer, etc. There was also a problem. Moreover, since the controls provided on the panel section of the load measuring device are simple ones composed of several controls, it is necessary to press a key several times to set and input desired measurement conditions and the like. I had to perform a troublesome operation, which was troublesome.
The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a load measuring device which does not have to be troublesome as described above.

  The load measuring device according to the present invention is a load measuring device that is connected to a load cell disposed on a load measuring object and performs processing of load measuring data by the load cell, and includes a panel unit including an operation unit and a display, and a detachable unit. A flash memory driver section for detachably mounting a flash memory of a type, processing of the load measurement data, operation detection and display control processing of the panel section, and reading and writing of data to the flash memory mounted on the flash memory driver section. A main processing unit for performing control, wherein at least one of data relating to a load measurement result and measurement condition setting data is stored in the flash memory.

  As an example, when data related to the load measurement result is stored in the flash memory, the flash memory is removed from the driver unit and set in an external device, so that the external device stores the load measurement result. When relevant data is available, or when the measurement condition setting data set by an external device is stored in the flash memory, the flash memory storing the measurement condition setting data is stored in the driver unit. By setting and reading by the main processing unit, the measurement condition is set according to the measurement condition setting data. As an example, using a compact flash memory card is convenient because it is convenient.

  By providing a flash memory driver unit for detachably mounting a removable flash memory, data related to load measurement results and measurement condition setting data at that time are stored in the flash memory, and the flash memory is connected to an external device. (For example, a personal computer), the measurement data and the like can be automatically taken into the external device and used, so that it is not troublesome to manually input the measurement data and the like. This provides an excellent effect that no problem such as an input error occurs. In addition, an external device (for example, a personal computer) having an easy-to-operate operation device such as a kana / alphanumeric keyboard is used to input desired measurement condition setting data, and a flash memory storing the data is set in the present load measuring device. This makes it possible to set desired measurement conditions, so that the desired measurement conditions can be easily set without using a panel unit including a limited number of operators. The effect is excellent.

  1A and 1B show the appearance of a load measuring device according to an embodiment of the present invention, wherein FIG. 1A is a front view and FIG. 1B is a rear view. The front panel unit 10 includes a numeric display 11 composed of four areas and a plurality of operators 12. Each of the operators 12 is an operator corresponding to a predetermined function, and includes a left switch and a right switch for switching a menu or the like to the left or right, and an increase switch for increasing or decreasing a numerical value or the like. And a decrease switch, and some other function selection switches. On the lower side of the panel section 10, a flash memory driver section 13 for detachably mounting a flash memory, which is a detachable nonvolatile memory, is provided, and a compact flash memory card 30 (FIG. 2) is inserted through an insertion slot 13a. ) Can be inserted and removed. On the back surface, a load cell connector 14 for connecting wiring from a load cell for measurement (not shown) and a control for connecting wiring from a device to which this load measuring device is applied (for example, a controller of a press machine). A connector 15 and other power supply connectors are provided.

  FIG. 2 is a block diagram schematically illustrating an internal configuration of the load measuring device according to the embodiment. The main processing unit includes a microcomputer including a CPU 20, a ROM 21, a RAM 22, and the like that store programs, data, and the like. The display 11, the operation unit 12, the flash memory driver unit 13, the connectors 14 and 15, and the non-volatile memory 24 are connected to the bus 23 of the CPU. The load cell connector 14 is connected to the bus 23 via the amplifier 25 and the A / D converter 26.

  This load measuring device can be configured with various specifications according to the load measurement purpose. The ROM 21 stores a program corresponding to the specifications, and various processes are executed by the CPU 20 executing the program. Be executed. Representative processes executed by the CPU 20 include an operation detection process of the operation unit 12 in the panel unit 10 and a display control process of the display unit 11, a load cell connector 14, an amplifier 25, and a load cell provided via the A / D converter 26. And processing the load measurement data by loading the load measurement data from the application device (for example, a controller of a press machine) via the control connector 15 and the load measurement data processing. And a process of controlling the flash memory driver unit 13 to read / write data from / to the flash memory card 30 attached to the driver unit 13.

Next, as one specification of the load measuring process, an example will be described in which the present invention is configured as a peak / sample and hold type load measuring device with an auto-zero and multi-stage comparator function.
The determination of the load measurement data taken in from the load cell connector 14 is performed by comparing and determining whether the measured value falls within a range between a predetermined upper limit value and a lower limit value. The upper limit value and the lower limit value can be arbitrarily set by the user, and the set of the upper limit set value and the lower limit set value arbitrarily set by the user corresponds to the comparison reference value in the one-stage comparator function. According to this specification, a comparator function of 32 stages can be prepared. That is, the upper limit set value and the lower limit set value of the 32 sets can be arbitrarily set. The upper limit set value and the lower limit set value can be arbitrarily set by operating the operation unit 12 on the panel unit 10, and the set data is stored and stored in the internal nonvolatile memory 24. However, the operator 12 provided on the panel unit 10 includes a relatively small number of function switches such as a left direction switch and a right direction switch for switching menus and the like, and an increase switch and a decrease switch. There is such a trouble that a switch operation must be performed many times to perform a desired setting.

  However, in this device, the setting operation can be facilitated by using the flash memory card 30. That is, the upper limit set value and the lower limit set value (that is, desired measurement condition setting data) of the 32 sets are arbitrarily set by an external device (for example, a personal computer) having an easy-to-operate operating device such as a kana / alphanumeric keyboard. Is input and stored in the flash memory card 30. The flash memory card 30 storing the desired setting data in this way is brought to the present load measuring device, inserted into the slot 13a of the flash memory driver unit 13, and the storage data of the flash memory card 30 is read inside. The read data (the set data of the 32 sets of the upper limit set value and the lower limit set value) is stored and stored in the internal nonvolatile memory 24. As described above, the setting operation can be facilitated by using the removable flash memory card 30. In this manner, the user can prepare and store 32 sets of determination reference values in advance according to the purpose.

  Next, an example of determination processing of measurement data will be described. In the determination process of the measurement data, first, one set of the upper limit set value and the lower limit set value to be used as the determination reference value is selected from the 32 sets of the upper limit set value and the lower limit set value. For example, a comparator selection signal is provided from an application device (for example, a controller of a press machine) via the control connector 15, one of the 32 sets (stages) of the comparator functions is selected, and the setting is performed for the selected comparator function. The set of the upper limit set value and the lower limit set value that has been set is used as a criterion value.

  FIG. 3 is a timing chart showing an example of the peak hold measurement method. The horizontal axis represents time, and the top row shows the state of the load measurement data taken in from the load cell connector 14 and shows the state of peak hold. "UPPER setting" exemplifies the level of the upper limit set value, and "LOWER setting" exemplifies the level of the lower limit set value, which are set and selected as described above. “HD input” illustrates the input timing of a hold start instruction signal, and “RES input” illustrates the input timing of a hold reset signal. These are provided from an application device (for example, a controller of a press machine) via the control connector 15 at a timing according to the state of the load measurement target. “+ NG output”, “GO output”, and “−NG output” indicate the respective determination results, “+ NG output” indicates a defect exceeding the upper limit set value, and “GO output” indicates the upper limit set value and the lower limit. The value is within the range of the set value and indicates a pass, and "-NG output" indicates a defect that is less than the lower limit set value. In the peak hold measurement, the peak hold processing of the load measurement data is always performed, and the load measurement data (peak-held value) when "HD input" is given is held for determination, and the "RES input" Is reset, both the peak hold value of the load measurement data and the hold value for the determination are reset. Then, the pass / fail judgment is made by comparing the hold value with the upper limit set value and the lower limit set value for the judgment.

  In the course of the above-described determination processing, the time-series data of the loaded load measurement data, the determination result, the measurement time, the measurement-related model identification number, and other measurement-related data are written to the flash memory card 30. The flash memory card 30 is removed from the slot 13a and taken to an external device (for example, a personal computer), and the external device reads data related to the load measurement result from the flash memory card 30. By doing so, data relating to the load measurement result can be easily used by an external device (for example, a personal computer).

Note that the measurement method is not limited to the peak hold measurement method as shown in FIG. 3, and a normal sample hold measurement method may be used. In the sample hold measurement method, the peak hold process is not performed, the load measurement data when “HD input” is given is held for determination, and when “RES input” is given, Reset the hold value. Then, the pass / fail judgment is made by comparing the hold value with the upper limit set value and the lower limit set value for the judgment. Of course, other appropriate measurement methods may be used.
The flash memory 30 is not limited to a card type, but may be any other type such as a stick type.

1A is a front view and FIG. 1B is a rear view of the load measuring device according to an embodiment of the present invention. FIG. 2 is a block diagram schematically showing the internal configuration of the load measuring device according to the embodiment. FIG. 4 is a timing chart showing an example of a peak hold measurement method.

Explanation of reference numerals

10 Panel Unit 11 Display Unit 12 Operator 13 Flash Memory Driver Unit 13a Insertion Slot 14 Load Cell Connector 15 Control Connector 20 CPU
21 ROM
22 RAM
23 bus 24 non-volatile memory 25 amplifier 26 A / D converter

Claims (2)

A load measurement device that is connected to a load cell disposed on a load measurement target and performs processing of load measurement data by the load cell,
A panel unit including an operator and a display,
A flash memory driver section for detachably mounting a removable flash memory,
A main processing unit that performs processing of the load measurement data, operation detection and display control processing of the panel unit, and read / write control of data to and from a flash memory mounted on the flash memory driver unit; A load measuring device, wherein at least one of data and measurement condition setting data is stored in the flash memory.   When data related to the load measurement result is stored in the flash memory, the flash memory is removed from the driver unit and set in an external device, so that the external device can store data related to the load measurement result. Is available, or when the measurement condition setting data set by an external device is stored in the flash memory, the flash memory storing the measurement condition setting data is set in the driver unit. 2. The load measuring device according to claim 1, wherein the main processing unit sets the measurement condition according to the measurement condition setting data by reading the measurement condition setting data.

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