JPS6229727B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an audio output type measuring instrument configured to output measured values by voice, and more specifically, to a measuring instrument equipped with a zero adjuster, which is configured to output measured values by voice. This invention relates to an audio output type measuring device that notifies you of the time by voice. When using a measuring instrument equipped with a zero adjuster, in conventional measuring instruments, each user must voluntarily and consciously
Before measurements, it was necessary to perform certain inspections, such as shorting the tester rod. In this case, if the above-mentioned zero adjustment work was ignored and measurements were taken, and it was only at the data review stage that it was realized that the zero adjustment was incorrect, the measurement would have to be taken again. SUMMARY OF THE INVENTION An object of the present invention is to provide an audio output type measuring instrument that notifies you by voice when zero adjustment is required, in order to prevent mistakes in zero adjustment work. The audio output type measuring instrument of the present invention automatically detects the offset value of the zero point immediately after power is turned on or at predetermined times at regular intervals, and if the offset value exceeds a predetermined tolerance value and requires zero adjustment. In this case, the present invention is characterized by having means for automatically notifying the user by voice, for example, ``I'm sorry for the inconvenience.'' An embodiment in which the present invention is implemented in an audio output type digital tester will be described below. FIG. 1 shows a perspective view of the external appearance of an embodiment of the present invention.
In Figure 1, 1 is the tester body, 2 is the speaker, 3 is the digital display, 4 is the measurement mode switch, 5 is the power switch, 6 is the output mode switch, 7 is the input terminal, and 8 is the tester bar. 9 is a tester rod, 10 is a measurement switch provided on the tester rod, 11 is a detection terminal of the tester rod, and 12 is a zero adjustment screw. The method of using this embodiment is as follows. When the output mode changeover switch 6 is set to the manual audio output mode position (N), when the measurement switch 10 is pressed, the measured value at that time is output as audio. Further, the display section 3 always displays the measured values. When the output mode changeover switch 6 is set to the automatic audio output mode position (IM), the measured values at that time are automatically output as audio, for example, every minute. Also, when the measurement switch 10 is pressed, the measured value at that time is outputted as voice. Further, the display section 3 always displays the measured values. When the output mode switching switch 6 is set to the display output mode position (OFF), there is no audio output even when the measurement switch 10 is pressed, and the display unit 3 only displays the measured value. FIG. 2 shows a circuit block diagram of an embodiment of the present invention. In the figure, 22 is a digital measurement section,
13 of them are counting circuits that store measured values in binary decimal code. The specific configuration of this digital measurement section 22 is shown in FIG. 5, and the signal waveforms of each section P ₀ to _{P 5} are shown in FIG. 6. In FIG. 5, numeral 59 is a short circuit that short-circuits the measurement terminals for zero adjustment, and is short-circuited only when signal a arrives. 60 is a voltage conversion circuit that converts a voltage proportional to each value when measuring resistance and current. 43 is detection terminal 1
For example, the input voltage V ₁ from the object to be measured introduced through 1 and the output P ₀ of the sawtooth wave generator 44
Match output P ₂ when the voltage levels match
The comparator 45 outputs the sawtooth wave generator 44
The pulse generator 46 outputs a pulse P ₁ at the rising edge of the output P ₂ of the pulse generator 45, and outputs a gate pulse P 3 which rises at the pulse P ₁ from the pulse generator 45 and falls at the pulse P ₂ from the comparator ₄₃ . The gate signal generation circuit 47 operates upon receiving the gate pulse P of the gate signal generation circuit 46, and during the period when the gate pulse _P3 is being outputted, the gate signal generation circuit 47 transmits the count pulse _P4 from the count pulse generation circuit 48 to the next stage. In the counting circuit 13 of
A gate circuit 13 outputs an effective count pulse P ₅ , and a counting circuit 13 counts the count pulse P ₅ output from the gate circuit 47 . _P0 = _V1
When this happens, the counting result becomes the digital measurement value of the input value. The above P ₀ is generated periodically, and the input value is counted by the counting circuit 13 each time. The explanation will be continued with reference to FIGS. 2 to 4 again. 14 is a speech synthesis circuit, and 2 is a speaker. This will be explained in detail below. [When the output mode changeover switch 6 is set to the manual audio output mode position (N)] When the measurement switch 10 is pressed, the output of the gate circuit 16 is generated since the manual audio output mode is N, and the measured value transfer gate 20 The contents of the counting circuit 13 containing the measured value are transferred to the temporary storage buffer register 21. Gate 17 at the same time
also operates, and the first sequential pulse generation circuit 1
Start operation 8. Here, C ₁ , . . . , C ₇ are codes corresponding _to the words to be audio output, and C 1 . That is, when the code is given to the _S1 input of the speech synthesis circuit 14, the speech quantization information storage section provided in the speech synthesis circuit 14 generates quantization information for outputting the word "Sokuteichi" as a voice. The membranes are sequentially output, digital-to-analog converted and applied to a speaker drive circuit, and the word "Sokteichi" is outputted as a voice from the speaker 2. Similarly, C ₂ is a code that instructs the speech synthesis circuit 14 to output the word "volt". C ₃ ......This is a code that instructs the voice synthesis circuit 14 to output the word "ampere" as a voice. C ₄ ......This is a code that instructs the speech synthesis circuit 14 to output the word "ohm" as a voice. _C5 ...This is a code that instructs the voice synthesis circuit 14 to output the voice of the word "DC". _C6 ...This is a code that instructs the voice synthesis circuit 14 to output the voice of the word "AC". _C7 ...This is a code that instructs the speech synthesis circuit 14 to output the word "mode". C ₈ ……Audio output of the word “death”,
This is a code that instructs the speech synthesis circuit 14. The first sequential pulse generation circuit 18 first generates a pulse _t1 by pressing the measurement switch 10,
Thereafter, each time the audio output end signal S ₂ arrives, t ₂ ,...
..., t ₇ and so on. This pulse situation is the third
As shown in the figure. When the pulse _t1 is first output by pressing the measurement switch 10, the gate circuit 19 transfers the code _C1 to the input data terminal _S1 of the speech synthesis circuit 14 via the gate circuit 23, and the signal is "SOKUTEICH".
is generated. When the end signal _S2 is output after the audio output of "Sokuteichi" is finished, a pulse _t2 is generated next. _{t2 ,} . After finishing the audio output of the measured value, a pulse _t6 is generated next. This pulse t ₆ and above
One of the three codes C ₂ , C ₃ , and C ₄ is transferred to the S ₁ input of the speech synthesis circuit 14 . gate 24
The control selects the corresponding code from among the three codes C ₂ , C ₃ , and C ₄ according to the setting state of the measurement mode changeover switch 4 and controls the gate 19 by selecting the corresponding code. The correspondence is shown in Table 1 below.

[When output mode selector switch 6 is set to automatic audio output mode position (IM)]

26 is a pulse generating circuit that generates one pulse (1 minute signal) every minute. Gate 16 is
Because of the automatic audio output mode IM, pulses from the pulse generation circuit 26 are also passed. Therefore, similarly to when the measuring switch 10 is pressed, the measured value, unit, etc. are outputted audibly every time the pulse is output. Here, if one minute has passed since the previous audio output, an output pulse is output from the pulse generation circuit 26,
When the measurement switch 10 is pressed when the measurement value at that time starts to be outputted audibly, the following happens. The conclusion is that since the gate circuit 15 is turned off, the measurement switch 1
Even if you press 0, no input is given to gate 16,
No audio output is made by the measurement switch 10.
That is, in the automatic audio output mode (IM), when the output pulse of the pulse generation circuit 26 is output, the gate 27 transfers the output pulse and sets the RS type flip-flop 28. By setting the flip-flop 28, the gate 15 is turned off. That is, when the 1-minute signal is output, the gate 15 is turned off. This flip-flop 28
is reset at the end of the audio output of a series of measurements based on the output of the 1 minute signal. The end of audio output of the measured value is detected as follows. When the pulse _t7 is output from the first sequential pulse generation circuit 18, it is to output the last "death" as an audio signal, and this pulse _t7 causes the RS type flip-flop 29 to output.
is set, and the flip-flop 29 is reset by the end signal _S2 which is output when the audio output of "Des" ends. Then, a transition period when the flip-flop 29 changes from a set state to a reset state is detected by a rising edge detection circuit 30, and an output pulse of the circuit 30, which is generated only during the transition period, is used to detect the flip-flop 29.
Reset 8. That is, when the audio output for each minute is finished, the flip-flop 28 is reset, and thereafter the gate 15 is in a state where it can transfer the press signal of the measurement switch 10. [When the output mode changeover switch 6 is set to the display output mode position (OFF)] Since the gate 16 is off, neither the 1-minute signal nor the press signal of the measurement switch 10 is transferred, and the audio output of the measurement value is not transmitted. Not done. The measured value is displayed on display section 3.
Check only with [Regarding zero adjustment and automatic voice notification output] When the power is turned on and when the pulse generation circuit 26 in Fig. 2
Every time the IM signal arrives, the OR gate 61 opens and a pulse is generated from the one shot multi circuit 62 for a time T _N , and the shot circuit 59 shown in FIG. The value when the terminals are shorted is transferred. The measured value at the time of this short circuit and the preset limit value that requires zero adjustment are determined by the comparator circuit 63 in FIG.
If the measured value exceeds the limit value, it is input to the pulse input circuit 64 and generates T ₁ '.
From the gate 65, a code Ci saying ``ZERO CHOOSEI WOSHITEKUDASI'' is sent to the input terminal _S1 of the speech synthesis circuit 14 via the gate 23. Note that this circuit has priority over the audio output of the setting measurement mode when the power is turned on, so if zero adjustment is required, it will immediately output "Zero adjustment" when the power is turned on, followed by "DACY VOLT". Outputs the setting measurement mode audibly, such as "Mode Des". [About voice notification control in setting measurement mode] Reference numeral 31 denotes a second sequential pulse generation circuit, which basically has the same configuration as the first sequential pulse generation circuit. When an input signal is applied to the circuit 31, it first generates a pulse _T1 , and thereafter generates a pulse _T2 → _T3 every time the audio output ends. The relationship between each generated pulse and the output audio pulse is as shown in Table 2 below.

[Table] That is, if the set measurement mode is the DCV measurement mode, "DCV mode" is output audibly. Switching between "DC" and "AC" at T ₁ is performed at gate 32. Also,
Switching at T ₂ is performed by also using the gate 24 described above. The "mode" audio output of _T3 uses the "mode" code _C7 as is. Speech synthesis circuit 14
The transfer of each of _the above codes C ₂ , . Note that the gate 23 is a gate for switching between the audio output of the measured value, the audio output of the measurement mode, and the audio output of the zero adjustment notification. When the RS flip-flop 34 is reset, an audio output of the measurement value is output, and when it is set, either the measurement mode audio output or the zero adjustment notification audio output is output. This flip-flop 34
is set when the power is turned on or when the measurement mode changeover switch 4 is changed over, and the above changeover operation continues for a predetermined period of time, or when the comparison circuit for zero adjustment notification is output. Ru. When the power switch 5 is turned on, a one-shot pulse is generated from the pulse generation circuit 35 during a transient period. This one-shot pulse passes through OR gate 41 and sets flip-flop 34.
At the same time, the second sequential pulse generating circuit 31 starts operating with the output pulse of the pulse generating circuit 35, and the measurement mode at that time is announced by voice as described above. However, if there is an output from the zero adjustment detection comparison circuit 63 at this time, the above-mentioned measurement mode audio output signal is temporarily stopped and delayed by the circuit 66 until the audio output of "Zero adjustment is complete" is completed. An RS type flip-flop 36 and a rising edge detection circuit 37 are provided to reset the flip-flop 34. That is, it operates in the same way as the flip-flop 29 and the rising edge detection circuit 30 described above, and the flip-flop ₃ is activated at T3.
6 is set, and the flip-flop 36 is reset by the end signal _S2 of the "mode" audio output based on _T3 . The circuit 37 detects this transition and outputs an output pulse, which resets the flip-flop 34. Next, the operation at the time of switching the measurement mode switching switch 4 will be explained. The detection circuit 38 is a circuit that detects that the measurement mode changeover switch 4 is changed over, and generates a one-shot pulse during the above-mentioned changeover transition. The monomulti circuit 39 outputs a pulse signal having a time width T _N when the one shot pulse arrives at its input. If the one-shot pulse is input successively while this output pulse is being output, the output time of the output pulse is further extended by T _N time from the input time of the successively input one-shot pulse.
The circuit 40 is a fall detection circuit that detects a transition period when the output pulse of the circuit 39 falls and outputs an output pulse. FIG. 4 shows the waveforms of each of the above signals. In the figure, S ₃₈ is the output signal of the detection circuit 38, S ₃₉ is the output signal of the mole multi circuit 39, and S ₄₀ is the output signal of the falling detection circuit 40. In other words, if the measurement mode changeover switch 4 is switched within T _N time,
At each intermediate switching, the output signal of the falling detection circuit 40 is not output, and the output signal of the falling detection circuit 40 is output when the switching operation is completed and time T _N has elapsed.
Based on the output signal of this fall detection circuit 40,
The audio notification of the setting measurement mode is performed in the same manner as when the power is turned on. However, in this case as well, similarly to when the power is turned on, if there is an output from the comparator circuit 63, after the audio output for zero adjustment notification ends, the setting measurement mode is output as audio. In the figure, 42 is a battery that serves as a power source. Next, the specific configuration of the speech synthesis circuit 14 will be explained. FIG. 7 is a block diagram showing a specific configuration of the speech synthesis circuit 14. In the figure, 49 is an audio quantization information storage section composed of a read-only memory, and audio quantization information is stored in this 49. P ₁ , P ₂ , P ₃ , ......, Pn, P _o+1 , ...
...indicates each region of the spoken word. Each area P of the phonetic word
consists of an area where a plurality of pieces of audio quantization information for outputting one word as audio are sequentially stored for each step, and an end code storage area located at the step next to the last step in the area. ing. 50 is the audio quantization information storage section 49
51 is an address decoder. It is assumed that the address counter 50 is reset by a reset circuit 52 when no audio is output. When the address counter 50 is in the reset state, no address in the audio quantization information storage section 49 is specified, and therefore no audio is output. When you want to output audio, select the corresponding audio area P
The initial address of is set in the address counter 50. For example, assuming that the desired word is in the _P2 area, the initial address of _P2 is set to 50. Then, information on the initial address is output from the audio quantization information storage section 49. In addition, 5
3 is an adder circuit for incrementing 50 addresses by one step. When address counter 50 is in the reset state, adder circuit 53 does not operate and the contents of address counter 50 remain unchanged. In other words, it remains reset. However, when the initial address arrives and the state becomes "0", the above "1" addition operation is automatically performed at a constant sampling frequency. Therefore, once the initial address is set in the address counter 50, the address is automatically incremented one step at a time. Therefore, the quantization information of the region _P2 is sequentially outputted from the audio quantization information storage section 49. This output is DA-converted by a digital-to-analog conversion circuit 54, and furthermore, a low-pass filter 55 passes low frequency components. This is because if the analog output when the quantized information is D-A converted is step-like, if it is output directly from a speaker, it may be difficult to hear because it contains high-frequency components and noisy audio is mixed in. Therefore, it is filtered with a low-pass filter. This is because it is desirable to do so. In this way, the output of the low-pass filter 55 is applied to the speaker drive circuit 58, and the speaker 2 outputs the sound. As described above, the data structure of each area of the audio quantization information storage section 49 is formed by adding an end code storage step to the step following the last step of the audio quantization information storage area. There is. Therefore, when the audio output of the desired word is completed, the audio quantization information storage section 49 outputs the end code. This is detected by the end code detection circuit 56, and the reset circuit 52 is activated to reset the address counter 50. As a result, no address in the storage section 49 is designated, and the series of audio outputs is stopped. This state is maintained until a new initial address is subsequently set in the address counter 50. 57
is a code conversion circuit that converts the audio area designation signal S ₁ (each of the above codes) in order to set the initial address of the audio area to be output in the address counter 50.
This is a conversion circuit for determining a desired initial address by C ₁ , . . . C ₈ or numerical code). This code conversion circuit 57 is configured to execute the code conversion operation based on the input of the input signal _S0 . Further, a detection signal from the end code detection circuit 56 is given to the sequential pulse generation circuits 18 and 31 as the end signal _S2 . Although the present invention has been described in detail above, taking as an example the case where the present invention is implemented in a tester, it goes without saying that the present invention can be implemented in other measuring instruments as well. As described in detail above, according to the present invention, when zero adjustment is required, a voice notification is provided, so that an extremely useful voice output type measuring instrument that can prevent the situation of redoing the measurement is provided. Obtainable.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an embodiment of the present invention, Fig. 2 is a circuit block diagram of an embodiment of the invention, Figs.
The figure is a waveform signal diagram explaining the operation of the embodiment shown in FIG. 2, FIG. 5 is a circuit block diagram showing the contents of the digital measuring section 22 of FIG. 2, and FIG. Fig. 7 is a signal waveform diagram explaining the second
FIG. 2 is a circuit block diagram showing the contents of the speech synthesis circuit 14 shown in the figure. 1...Main body, 2...Speaker, 4...Measurement mode selection switch, 5...Power switch, 12...
Zero adjustment screw, 14...Speech synthesis circuit, 22...
Digital measuring section, 24...gate, 31...second
Sequential pulse generation circuit, 32...gate, 33...gate, 35...pulse generation circuit,
38...detection circuit, 39...mono multi circuit, 4
0... Fall detection circuit, 59... Short circuit,
60... Voltage conversion circuit, 61... OR gate, 6
2...Mono multi circuit, 63...Comparison circuit, 64
...Pulse generation circuit, 65...Gate, 66...
Pause circuit.

Claims (1)

[Claims] 1. An audio output measuring instrument configured to output measured values audibly and equipped with a manual zero adjustment device requires means for detecting the deviation of the zero point at a predetermined time and zero adjustment. 1. A voice output type measuring instrument characterized by being provided with a means for notifying the user by voice.