JPH0311416B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device related to a weighing value of an electronic scale.

Conventionally, in electronic scales that detect the weight of a sample placed on a tray using a load-to-electricity converter and display the weighed value, the display is Most of the information was displayed digitally. Although this digital display is certainly convenient for measuring unknown weights, for example, when measuring a fixed amount of liquid, etc., it is necessary to measure a fixed amount while gradually increasing the amount of the sample on the saucer. It was necessary to read the displayed value, and it was very difficult to read the numbers that were changing, making it difficult to use for such tasks. It goes without saying that analog display is more desirable in order to grasp the approximate value of the displayed value during such changes. Conventionally, there are already display devices for electronic scales that have both a digital display and an analog display, but these
This system is equipped with 20 or 20 display elements to correspond to all weighing values, but the resolution is insufficient to provide a rough understanding of the values in the above-mentioned work, so it is not practical. It was almost useless, having only a guideline or design function.

The present invention was made in view of the above points, and in the work of measuring a certain amount of liquid, etc.,
The object of the present invention is to provide a display device for an electronic scale that allows intuitive weighing (sample injection, etc.) and enables efficient weighing work.

A feature of the present invention is that, in addition to a digital display device that displays a weight value, it is constructed of a plurality of continuously arranged display elements, and a part of the digital display device other than the most significant digit of the above-mentioned digital display device is The present invention is characterized in that it includes an analog display device that displays numerical values in an analog manner in correspondence with digits, and a selection means that selects the digit of a digital display device that is displayed by the analog display device.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an external perspective view of an electronic balance incorporating an embodiment of the present invention, and FIG. 2 is a front view of its analog display section.

A weight display section 2 for displaying the weight of the sample W on the tray 1 is provided on the front of the case 3, and includes a digital display device 4 for displaying the weight value in numbers, and a number of digits corresponding to some digits of the digital display device. An analog display device 5 for displaying numerical values in an analog manner is arranged.

The analog display device 5 is composed of 100 sets of multiple rows of display elements 6...6, which are arranged in succession from the lower left to the upper right in FIG. 2 according to the numerical value of the corresponding digital display digit. Each of the display elements 6...6 changes over time, forming a bar-like display as a whole. As the display element 6, a light emitting diode, a liquid crystal display element, a fluorescent display tube, or other display element can be used. Any two digits of the digital display device 4 to which this analog display device 5 corresponds are selected using the analog display digit selection key 7, and as shown in FIG. A display 8 is provided to indicate the digits in the analog display. Further, by using the analog display digit selection key 7, the digits of the digital display to be displayed in analog can be set to an automatic switching mode. In other words, in the automatic switching mode, the analog display digit corresponding to the rate of change in the detected weight is determined in advance, and by monitoring this rate of change, the optimum digit is automatically displayed in analog. The display section 2 is provided with an automatic-manual mode display 9 as shown in FIG.

Next, the operation of measuring a fixed amount of liquid according to the above-described embodiment of the present invention will be described in comparison with the conventional case where only digital display is used.

For example, assume that 2350.0g of liquid is weighed. First, the digits of the analog display according to the embodiment of the present invention are set to two digits from the lowest digit. When the sample liquid is initially injected at a rate of about 500 g per second, the number on the top digit of the digital display device 4 increases by 1 every two seconds, making it fully readable. As soon as the digit reaches 2, reduce the injection rate to approximately 100 g/s.
Then, the second digit from the highest digit will increase by 1 every second, so if you get 3, immediately reduce the injection rate to about 10 g/sec. At this time, the third digit from the highest digit increases by 1 every second, so it is fully readable, but the fourth digit increases by 1 every 0.1 seconds, and the fifth digit increases by 1 every 0.01 seconds. Although it is practically impossible to read, when the third digit from the highest digit becomes 4, pay attention to the analog display 5, and when the analog display reaches about halfway, change the injection speed. Continue to create,
If you control it to stop at full scale (100), it will be 2350.0g. This change in injection rate can be controlled relatively easily because of the analog display, and the final value reading is confirmed by the digital display value and the weighing operation is completed. In this case, the time required for weighing is approximately 16 seconds.

By the way, when performing the same task with a conventional device that displays only a digital display, the process is exactly the same from the top digit until the third digit is 4, and in order to read the fourth digit, , the injection rate must be reduced to approximately 1 g per second, and to approximately 0.1 g per second for the fifth digit, and the time required for weighing in this case is approximately 29 seconds.

Also, for example, when measuring a certain amount,
In weighing work where it is only necessary to accurately determine the excess or deficiency of a certain amount, for example, if the third and fourth digits from the highest digit are displayed in correspondence with the analog display, the work can be completed more quickly. Can be done.

In addition, the digits on the digital display that correspond to the analog display often change at a very fast rate, as in the usage example above, which is a pain to look at. It may be configured such that the operation is stopped in other cases.

To explain the operation when performing the above-mentioned weighing operation using the analog display digit automatic switching mode of the embodiment of the present invention, the second and third digits from the highest digit are displayed in analog when 500 g/sec is injected. When injecting at 100g/sec, the third and fourth digits from the top digit are displayed in analog form, and when injecting at 10g/sec, the fourth and fifth digits from the top digit are displayed in analog form. In this case, since the analog display can be referred to from the beginning of injection, the work can be carried out more efficiently.

An example of the circuit configuration diagram of the embodiment of the present invention is shown in the fourth example.
As shown in the figure. This example is an example of a circuit using a microcomputer, and the central control unit 11 includes:
A load-to-electricity converter 12 for detecting the weight of the sample on the tray, a read-only memory 13 for storing measurement programs, etc., a random access memory 14 for storing measurement values and other data, and operation keys 15 are connected to the programmable peripherals. Various signals are sent to the digital display device 4 via the interface 16 and further to the analog display device 5 via the decoder 17.

Furthermore, if a plurality of display elements are arranged in an endless manner as shown in the front view of FIG.
Since one round of the analog display corresponds to the numerical value "1" in the next higher digit than the corresponding digit on the digital display, it can be made easier to use.

As explained above, according to the present invention, a digital display device that displays a weight value and an analog display device that corresponds only to some digits excluding the most significant digit of the digital display device are provided, and the analog Since we have provided a selection means for selecting the digit of the digital display device to be displayed on the display device, it is possible to select the digit to be displayed on the digital display device.
By displaying the desired digit in analog, you can quickly react and adjust the sample injection operation while intuitively getting the desired order.
It is possible to obtain an electronic scale that allows prompt weighing work and allows the final weighing value to be read accurately and without errors by means of a digital display. Also, when measuring an unknown weight, it can be read on a digital display as usual.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an embodiment of the invention, Fig. 2 is a front view of the analog display device, Fig. 3 is a front view of the vicinity of the digital display device, and Fig. 4 is a circuit configuration diagram of the embodiment of the invention. , FIG. 5 is a front view of a display unit according to another embodiment of the present invention. 4...Digital display device, 5...Analog display device, 6...Display element, 7...Analog display digit selection key, 11...Central control unit, 12...Load-electrical conversion device, 16...Interface , 17
……decoder.

Claims (1)

[Scope of Claims] 1. Consisting of a multi-digit digital display device that displays the weighed value of a sample placed on a tray, and a plurality of continuously arranged display elements, the most important part of the digital display device is A display of an electronic scale comprising an analog display device that displays numerical values in an analog manner corresponding to some digits excluding the upper digits, and a selection means for selecting the digits of the digital display device displayed by the analog display device. Device. 2. The electronic scale according to claim 1, wherein the analog display device is an analog display device in which a plurality of display elements are linearly arranged in at least one row and has a rod shape as a whole. display device. 3. The display device for an electronic scale according to claim 1, wherein the analog display device is a loop-shaped analog display device in which a plurality of display elements are arranged in an endless manner. 4 Claim 1, characterized in that the digital display device is configured to operate only when the numerical value of the digit of the digital display device corresponding to the analog display by the analog display device is below a predetermined rate of change. A display device for an electronic scale according to item 1, 2 or 3. 5. A patent characterized in that the selection means is means for automatically selecting the digit of the digital display device to be displayed by the analog display device to a preset digit according to the detected weight change rate. Claim 1, 2, 3 or 4
Display device for electronic scales as described in Section 1.