JP2012093201A - Measurement device and waveform measurement display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform measurement display method and the like which freely realize a trigger function, suppress power consumption of an external information processor while preventing overflow in the same processor, and also can realize smooth waveform display.SOLUTION: In a waveform measurement display system 1, a communication unit 17 unilaterally transmits waveform data measured by a measurement unit 3 according to processing capacity of an external information processor 5 by wireless communication. Further, a detection unit 15 performs trigger processing independently of processing in the communication unit 17 by using sampling data of a communication buffer 13. The detection unit 15 is realized by using programs, and further, utilization of the communication buffer 13 by the detection unit 15 prevents the number of components and the like from increasing.

Description

  The present invention relates to a measurement apparatus and a waveform measurement display method, and more particularly to a waveform measurement display in a waveform measurement display system including a measurement apparatus that measures a waveform, and an external information processing apparatus that displays the measurement waveform. Regarding the method.

  In recent years, the need for a waveform measurement display device represented by an oscilloscope is increasing, and its use is progressing among software developers. In addition to analog oscilloscopes, there are digital oscilloscopes as described in Patent Document 1.

  On the other hand, information processing apparatuses such as personal computers have also been developed in various ways. For example, there is a high-performance device such as a smartphone that can perform not only a telephone function but also an electronic mail communication or connection to the Internet by wireless communication and can be loaded with various application programs.

JP-A-5-273247

  However, the oscilloscope described in Patent Document 1 includes a digital trigger circuit in which a condition is set by a trigger condition setting unit for a trigger function. Thus, a dedicated circuit is required for the trigger function. For this reason, there is a restriction on the circuit configuration as hardware, and the degree of freedom in detecting a trigger is not sufficient. In addition, since a dedicated circuit is required, it is not sufficient in terms of downsizing and reduction in the number of parts.

  On the other hand, high-performance information processing devices such as smartphones are also appearing, but the processing speed and power that can be consumed are not unlimited, but are limited and limited. When data communication exceeds the processing capability of the information processing apparatus, overflow may occur on the information processing apparatus side. Therefore, in general, an information processing apparatus such as a general-purpose computer sends a transmission request signal (Ready signal) notifying the transmission side that reception is possible, and the transmission side responds to the transmission request signal. To send data. The transmitting side is in the same state as not performing any processing while not receiving this transmission request signal. Therefore, data communication has become intermittent due to transmission / reception of the transmission request signal. Furthermore, the information processing apparatus also needs processing related to transmission / reception of a transmission request signal. This is a big problem when the power that can be consumed is limited like a smartphone.

  Therefore, the present invention provides a method for measuring a waveform by using a measurement device for measuring a waveform together with an external information processing device for displaying the measured waveform while using wireless communication. Thus, in an external information processing apparatus, a first object is to provide a waveform measurement display method and the like that can prevent overflow, further reduce power consumption, and can smoothly perform waveform display by eliminating intermittent communication using a transmission request signal. And In addition to the first object, a second object of the present invention is to provide a waveform measurement display method and the like that can smoothly display a waveform while the trigger function is being executed.

  The invention according to claim 1 is a waveform measurement display method in a waveform measurement display system including a measurement device that measures a waveform and an external information processing device that displays a waveform measured by the measurement device, the measurement device including: A measurement unit that measures a waveform; a buffer that stores waveform data measured by the measurement unit; and a transmission unit that transmits data stored in the buffer by wireless communication to the external information processing apparatus, The external information processing apparatus is stored in the receiving unit that receives data transmitted from the transmitting unit through wireless communication, the display storage unit that stores the received data, the display unit, and the display storage unit. Control means for controlling the display unit to display the detected data, and the detection means has detection position data representing a detection position where trigger detection should be performed from the external information processing apparatus. A trigger processing step for performing a trigger process for detecting that a condition relating to a change in waveform is satisfied from at least two data stored in the buffer in response to being input, wherein the transmission unit includes the detection unit When the trigger processing is not performed, the waveform data stored in the buffer is converted into data corresponding to the processing capability in response to the input of the processing capability data indicating the processing capability of the control means. If the condition relating to the change in the waveform is not satisfied when the detection means is performing the trigger process, the data stored in the buffer is transmitted. First, when it is detected that the condition relating to the change in waveform is satisfied, the data stored in the buffer is transmitted.

  The invention according to claim 2 is the waveform measurement display method according to claim 1, wherein the condition relating to the change in waveform is a trigger detection condition input together with the detection position data from the external information processing apparatus, The number of data that can be stored in the display storage unit is M, and the detection position is Y-th measured data among the M data. In the trigger processing step, the detection unit newly adds the measurement unit. Comparing at least one of the measured waveform data and Y-1 data measured before that, it is detected that the trigger detection condition is satisfied, and the transmission unit When the detection means is performing the trigger processing and detects that the condition relating to the waveform change is satisfied, the Y data stored in the buffer at the time of detection are detected. It transmits the, and transmits a newly measured M-Y-number of data, the control means is M data received shall be displayed on the display unit.

  The invention according to claim 3 is the waveform measurement display method according to claim 1 or 2, wherein the control means is realized by using an application program, and the processing capability data is used for the display. The amount of data received by the receiving unit is deleted from the storage unit, and it is determined by a process of adding newly received data, and is input to the detecting means.

  The invention according to claim 4 is a measurement device that measures a waveform, and comprises an external information processing device that displays a waveform measured by the measurement device, constitutes a waveform measurement display system, and a measurement unit that measures the waveform; Trigger detection should be performed from the buffer that stores the waveform data measured by the measurement unit, the transmission unit that transmits the data stored in the buffer by wireless communication to the external information processing device, and the external information processing device In response to input of detection position data representing a detection position, a detection means for performing a trigger process for detecting that a condition relating to a change in waveform is satisfied from at least two data stored in the buffer; When the transmission unit does not perform the trigger process, the transmission unit receives processing capability data representing the processing capability of the external information processing apparatus. In response, the waveform data stored in the buffer is wirelessly transmitted to the external information processing apparatus with a data amount corresponding to the processing capability, and the detection means performs the trigger processing. When the condition regarding the waveform change is not satisfied, the data stored in the buffer is not transmitted. When the condition regarding the waveform change is detected, the data stored in the buffer is not transmitted. It is characterized by transmitting.

  In addition to the processing in which the control means deletes the amount of data received at the receiving unit and adds newly received data to the display storage unit, the processing means data is displayed on the display unit. You may determine including the process to display.

  The detection means may be realized by a program. As a result, the number of parts can be reduced, the size can be reduced, and the degree of freedom of the trigger function can be increased. Furthermore, the trigger detection process can be designed independently of the transmission process by the transmission unit. Therefore, it is possible to realize a trigger detection process with high accuracy without depending on the processing capability of the external information processing apparatus. Therefore, it is possible to realize advanced trigger detection processing along with smooth waveform display.

  According to the present invention, even when the control unit of the external information processing apparatus is realized by a general-purpose computer, for example, when the external information processing apparatus is realized by using an application program, The waveform data measured by the unit is continuously transmitted by wireless communication with the amount of data corresponding to the processing capability of the external information processing device by the transmission unit, so that the processing capacity of the external information processing device is not exceeded and overflow occurs. Can be prevented. Furthermore, the transmission unit transmits and receives the waveform data unilaterally, so to speak, so-called “running communication” without exchanging signals with the external information processing device, thereby omitting transmission / reception of transmission request signals, etc. As a result, the power consumption of the external information processing apparatus can be suppressed, and the intermittent display by the transmission request signal can be eliminated, and the waveform display can be performed smoothly.

  Furthermore, according to the present invention, by implementing the trigger function in the measuring device 3, it is possible to realize a continuous advanced trigger function without depending on the communication environment between the measuring device and the external information processing device. become. The waveform can be displayed smoothly even while the trigger function is being executed.

  Furthermore, according to the second aspect of the present invention, it is possible to display at an appropriate detection position on the display unit of the external information processing apparatus. Therefore, a user-friendly system can be realized for users of the external information processing apparatus.

1 is a schematic block diagram of a waveform measurement display system according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating an example of processing capability collection processing of the external information processing apparatus 5 by the communication unit 17, the external communication unit 21, and the control unit 25 of FIG. It is a flowchart which shows an example of the display process of the data of the waveform in normal mode by the communication part 17, the external communication part 21, and the control part 25 of FIG. It is a flowchart which shows an example of the sampling process of the waveform data by the measurement part 11 of FIG. It is a figure which shows an example of the sampling process by the measurement part of FIG. 1, and the trigger detection process by the detection part. It is a flowchart which shows an example of the display process of the waveform data in the trigger mode by the communication part 17, the external communication part 21, and the control part 25 of FIG.

  FIG. 1 is a schematic block diagram of a waveform measurement display system according to an embodiment of the present invention. Referring to FIG. 1, a waveform measurement display system 1 (an example of “waveform measurement display system” in the claims of the present application) includes a measurement device 3 (an example of “measurement device” in the claims of the present application) and a measurement. An external information processing device 5 (an example of an “external information processing device” in the claims of the present application) that displays a waveform measured by the device 3 is provided. The measuring device 3 and the external information processing device 5 transmit and receive data by wireless communication.

  The measurement device 3 stores a measurement unit 11 that measures a waveform (an example of a “measurement unit” in the claims of the present application) and a waveform buffer (hereinafter referred to as “sampling data”) measured by the measurement unit 11. 13 (an example of a “buffer” in the claims of the present application) and a detection unit 15 (a process for generating a trigger event when a predetermined trigger detection condition is met) And a communication unit 17 (an example of “transmission unit” in the claims of the present application) that transmits data stored in the communication buffer 13 to the external information processing apparatus 5 by wireless communication.

  The hardware configuration of the measurement unit 11 includes, for example, a preamplifier and an AD converter. The sampling data will be described as 1-byte digital data. The hardware configuration of the measuring device 3 is composed of a microcomputer. The detection part 15 implement | achieves a trigger function with reference to the communication buffer 13 with the operation | movement of this microcomputer using a program. With this trigger function by software, it is possible to detect a falling / rising signal having an arbitrary slope at an arbitrary place. The operation of the detection unit 15 will be specifically described later with reference to FIG. In the present invention, the detection unit 15 may be capable of realizing an arbitrary trigger function in hardware, such as an FPGA.

  The communication buffer 13 is N buffers (N is a natural number greater than or equal to the number of data that can be stored in the display buffer 23), for example, reserved on the memory of the microcomputer of the measuring device 3. The measuring unit 11 stores the measured sampling data in order from the first address (leftmost in FIG. 1) to the Nth address (rightmost in FIG. 1) of the communication buffer 13. The (N + 1) th sampling data is overwritten and stored at the first address, and thereafter is overwritten and stored in the same manner.

  The external information processing apparatus 5 in FIG. 1 is an information processing apparatus having a wireless communication function and a display function, such as a PC (personal computer) or a smartphone. The external information processing apparatus 5 includes an external communication unit 21 that receives data transmitted from the transmission unit 17 by wireless communication (an example of a “reception unit” in the claims of the present application) and received data (hereinafter referred to as “reception data”). .) Is stored in the display buffer 23 (an example of the “display storage unit” of the present invention), the display unit 27 (an example of the “display unit” in the claims of the present application), and the received data is displayed on the display unit 27. The control part 25 (an example of the "control means" of a claim) is provided.

  The control unit 25 is realized using an application program. The control unit 25 stores the received data in the display buffer 23 in order. In the display buffer 23, the data in the display buffer 23 is shifted by the byte of the received data and deleted from the most recently received data (shifted to the left in FIG. 1), and newly received data is added ( It is added to the right in FIG. 1). Then, the control unit 25 causes the display unit 27 (for example, a display) to display the received data of the display buffer 23 as a waveform. Thereby, the waveform that flows from the left to the right is displayed on the display unit 27.

  In the present embodiment, the external information processing apparatus 5 is realized by various hardware configurations. The processing speed of the CPU varies depending on the device. For this reason, the processing speed of the control unit 25 also differs depending on the hardware configuration. Therefore, the control unit 25 measures the processing speed in advance and transmits processing capability data (hereinafter referred to as “performance data”) representing the processing capability of the control unit 25 to the measuring device 3. The measuring device 3 eliminates the transmission request signal (Ready signal) by performing communication according to the speed, minimizes the power consumption on the sender side, and is smooth and safe with no overflow or reception leakage. Communication is possible. Therefore, by using this technology, it is possible to adapt to the processing speed of any device.

  FIG. 2 is a flowchart showing an example of processing capability collection processing of the external information processing apparatus 5 by the communication unit 17, the external communication unit 21, and the control unit 25. The communication unit 17 transmits a sufficient number of data in the communication buffer 13 at a sufficient communication speed (step STSI1). In FIG. 2, the case where it transmits with the maximum communication speed of the communication part 17 is described so that an ideal state may be implement | achieved. However, in the present invention, any communication speed that allows the processing performance of the external information processing apparatus 5 to be examined may be used, and the present invention is not limited to the determination based on the communication unit 17.

  In this embodiment, in the application program for realizing the control unit 25, the number of read bytes when the reception function is called once is A byte. The control unit 25 obtains the number of calls B per second for various values of A, and a specific combination of A and B (for example, A × B is a communication amount per second, which is The combination of A and B, which is the highest value, is transmitted to the measuring device 3 as performance data.

  Specifically, in the external information processing apparatus 5, the control unit 25 receives the A byte by calling the reception function (step STRI1). The control unit 25 shifts the data in the display buffer 23 by the received bytes (step STRI2). The control unit 25 stores the received A-byte data in the display buffer 23 (step STRI3). The control unit 25 draws the data in the display buffer 23 as a waveform on the display unit 27 (step STRI4). Then, the variable i is incremented by 1 (step STRI5). This process is repeated for a predetermined time.

  By examining the count-up value of the variable i within a predetermined time, when the application program is executed in the control unit 25 for a specific value of A, how many times reception is performed per second (what The receive function is called). The control unit 25 determines the number of repetitions B per second by dividing the count-up value of i by a predetermined time (second) corresponding to each value of the parameter A.

  The external information processing apparatus 5 obtains B corresponding to each A value by performing the processing of steps STRI1 to 5 for various A values. Then, one of the combinations of the received data amount A and the number of repetitions B per unit time is transmitted to the measuring device 3 as performance data. In this embodiment, the sampling data is 1 byte for simplicity. Therefore, the measurement device 3 transmits data at a speed of A × B bytes / second, and the external information processing device 5 performs a drawing process by calling a reception function to receive A bytes.

  In this embodiment, when determining the combination of A and B, pay attention to B, so to speak, not only make the measuring device 3 match the external information processing device 5, but also pay attention to A, It is also important to match the processing speed of the external information processing device 5 with the measuring device 3. For this reason, in this embodiment, the determination is comprehensively made by various combinations of A and B corresponding thereto. For example, when the external information processing device 5 knows that data is transferred from the measuring device 3 at the speed C, A × B = C, and A and B can be adjusted from this equation. Therefore, the performance data of the external information processing apparatus 5 is determined not only by the number of transfers B per unit time but also by adjusting A and adjusting the processing speed of the external information processing apparatus 5 itself. It is possible to balance processing.

  FIG. 3 shows a display processing of waveform data measured by the communication unit 17, the external communication unit 21, and the control unit 25 when the detection unit 15 does not perform trigger detection processing (hereinafter referred to as “normal mode”). It is a flowchart which shows an example. The communication unit 17 transmits the sampling data stored in the communication buffer by the measurement unit 11 to the external information processing apparatus 5 at a speed of A × B bytes / second (step STNS1).

  In the external information processing apparatus 5, the control unit 25 receives the A byte by calling the reception function (step STNR1). The control unit 25 shifts the data in the display buffer 23 by the received bytes (step STNR2). The control unit 25 stores the received A-byte data in the display buffer 23 (step STNR3). The control unit 25 causes the display unit 27 to draw the data in the display buffer 23 as a waveform (step STNR4). By repeating this, smooth sampling data display processing can be realized.

  FIG. 4 is a flowchart illustrating an example of waveform data sampling processing by the measurement unit 11 in the normal mode. The measuring unit 11 samples 1 byte, obtains waveform data, and stores it in the communication buffer 13 (step STN1). The measurement unit 11 determines whether or not the communication buffer 13 is full (step STN2). If the communication buffer 13 is not full, the measurement unit 11 returns to step STN1 and continues the sampling process. If it is full, sampling is paused until it is no longer full (step STN3). Note that the sampling process is adjusted to a time interval corresponding to the values of X and B, thereby avoiding a sampling pause (step STN3).

  In the normal mode, when the sampling rate of the measuring unit 11 is lower than the processing capability of the external information processing apparatus 5, data is also transmitted simultaneously with the sampling process, and no data is stored in the communication buffer 13. On the other hand, when the sampling speed of the measuring unit 11 is larger than the processing capability of the external information processing device 5, the data transmission cannot keep up and the sampling data is stored in the communication buffer 13 one after another. Processing is required. This is because a high frequency waveform can also be sampled and displayed as a waveform. Even if the communication speed is quite slow, if you save a sample that was sampled at a high speed in a buffer and later send it slowly at a low communication speed, the external information processing device can display a waveform with a frequency exceeding the communication speed. it can. Therefore, as will be described later, the communication buffer 13 is used for sampling a high-frequency waveform in the normal mode in addition to realizing the trigger detection process by the detection unit 15.

  According to the present embodiment, in the normal mode, it is possible to perform smooth, high-safety communication without overflow or reception leakage without a transmission request signal from the external information processing apparatus 5. Furthermore, the external information processing apparatus 5 can realize low power consumption in wireless communication.

  That is, when a transmission request signal is used, it takes time to call the transmission request signal and reach the module. Therefore, since the measuring device 3 has to wait for a transmission request signal, the overall communication speed decreases. Wireless communication is slower than wired communication, and it is necessary to use limited communication speed effectively and to the maximum. For this reason, as described in the present invention, by implementing “sagging communication”, sampling data can be transmitted and received without transmitting and receiving a transmission request signal, and the communication speed can be effectively utilized.

  Furthermore, waveform display processing such as an oscilloscope is stream data. When the transmission request signal is used, the stream may be interrupted due to the waiting time of the transmission request signal, and the display waveform may be interrupted and displayed. By realizing “dripping communication” as in the present invention, the waveform can be displayed smoothly without interruption.

  5 and 6, when the detection unit 15 performs a trigger detection process (hereinafter referred to as “trigger mode”), the sampling process by the measurement unit 11 and the waveform data by the communication unit 17 and the control unit 25 are described. An example of the display process will be described. In the trigger mode of the present embodiment, trigger detection processing is performed in the measuring device 3, and waveform data is transmitted to the external information processing device 5 when a trigger detection condition is satisfied. Thereby, an effective (no missing) trigger detection process can be realized. Here, in this embodiment, it is assumed that rising or falling is detected. It is assumed that the reference numerical values a and b and the detection position Y are specified by the external information processing apparatus 5. In the following, it is assumed that the number of data that can be stored in the display buffer 23 is M. It is assumed that the user of the external information processing apparatus 5 has instructed Y-th (Y is a natural number less than or equal to M) data as the detection position. In addition, as a trigger detection condition, a buffer [i] (i-th address buffer) in which newly measured data is stored (i is a natural number equal to or less than the number of data that can be stored in the communication buffer 13), and j For each of two buffers [i−j] (buffers storing data measured j times before) in which data measured before (j is a natural number equal to or less than Y−1) are stored, respectively. , A is specified to be larger than a and smaller than b.

  In the present embodiment, the trigger function is realized by software or the like for the value stored in the communication buffer 13. Therefore, the number of parts can be reduced without requiring hardware changes. Unlike the display buffer 23, the communication buffer 13 has a fixed storage location. Therefore, the detection unit 15 can perform the trigger detection process independently of the process performed by the measurement unit 11. Furthermore, unlike the case where the trigger function is realized by fixed hardware, there is no limitation on the trigger detection condition, the rising and falling slopes can be set arbitrarily, and the detection position can also be set arbitrarily it can. The external information processing apparatus 5 is provided with a designation unit that is linked with display (for example, a PC has a screen click function, and a smartphone has a screen touch function). Therefore, it is possible to detect a trigger event using a place where the user of the external information processing apparatus 5 clicks or touches as a detection position. By realizing the trigger function by software or the like, the screen position information can be easily reflected in the trigger event. Therefore, the trigger function is realized at least when the user of the external information processing apparatus 5 designates the detection position from the position information on the screen and the detection position data indicating the detection position is transmitted to the measurement apparatus 3. You just have to do it. For example, other trigger detection conditions such as numerical values “a” and “b” may use previous values or values determined in advance in the manufacturing stage unless there is a new designation.

  A specific description will be given with reference to FIG. FIG. 5 is a diagram illustrating an example of sampling processing by the measurement unit 11 in the trigger mode. The measuring unit 11 performs sampling processing of Y-1 bytes and stores it in the communication buffer 13 (step STT1). Further, a 1-byte sampling process is newly performed and stored in the communication buffer 13 (step STT2). This is stored in the buffer [i]. The detection unit 15 determines whether or not the value of the buffer [i] is larger than a (step STT3). If larger, it is further determined whether or not the value of the buffer [i−j] is smaller than b (step STT4). When the value of the buffer [i] is larger than a and the buffer [i−j] is small, it is determined that a trigger event has occurred (that is, rising or falling has occurred). Otherwise, the sampling process of step STT2 is repeated until a trigger event occurs. This sampling process is continued until the trigger detection condition is met, and the communication buffer 13 is overwritten.

  When a trigger event occurs, the communication unit 17 transmits Y data detected so far to the external information processing apparatus 5. The measurement unit 11 further samples MY bytes (step STT5). The communication unit 17 also transmits the newly detected MY sampling data to the external information processing apparatus 5. The control unit 25 of the external information processing device 5 sequentially stores the received M pieces of data in the display buffer and displays them. As a result, the display unit 27 can display the detection result at an appropriate detection position in a so-called “flash” manner. And the measurement part 11 judges whether the communication buffer 13 is full (step STT6). If it is not full, the process returns to step STT1, and sampling processing and trigger processing are continued. If it is full, sampling is paused until it is no longer full (step STT7).

FIG. 6 is a flowchart showing an example of display processing of waveform data measured by the communication unit 17, the external communication unit 21, and the control unit 25 in the trigger mode. In measurement device 3, communication unit 17 does not transmit data until the trigger detection condition is satisfied (step STTS1). The communication unit 17 transmits M-byte data when the trigger detection condition is satisfied (step STTS2). For example, when A is M in FIG. 2, the number of times B _M per unit time is measured, and the transmission speed may be transmitted by M × B _M bytes / second. .

  In the external information processing apparatus 5, the control unit 25 receives M bytes by calling a reception function (step STTR1). The control unit 25 sequentially stores the received M bytes in the display buffer 23 (step STTR2). The control unit 25 causes the display unit 27 to draw the data in the display buffer 23 as a waveform (step STRI4).

  If waveform data is dropped from the measurement device 3 to the external information processing device 5 and the trigger function is realized in the external information processing device 5, for example, when a situation in which physical communication cannot be performed occurs, the waveform is lost. Cannot be detected. In the measuring apparatus 3, by realizing the detection unit 15 by a program or the like, free waveform detection processing by software or the like can be effectively and without being missed without stopping the processing.

  DESCRIPTION OF SYMBOLS 1 Waveform measurement display system, 3 Measurement apparatus, 5 External information processing apparatus, 11 Measurement part, 13 Communication buffer, 15 Detection part, 17 Communication part, 21 External communication part, 23 Display buffer, 25 Control part, 27 Display part

Claims (4)

A waveform measurement display method in a waveform measurement display system comprising a measurement device for measuring a waveform and an external information processing device for displaying a waveform measured by the measurement device,
The measuring device is
A measurement unit for measuring the waveform;
A buffer for storing waveform data measured by the measurement unit;
A transmission unit that transmits data stored in the buffer by wireless communication to the external information processing apparatus;
The external information processing apparatus
A receiving unit that receives data transmitted by wireless communication from the transmitting unit;
A display storage unit for storing the received data;
A display unit;
Control means for performing control to display data stored in the display storage unit on the display unit,
In response to input of detection position data representing a detection position where trigger detection should be performed from the external information processing apparatus, the detection unit has a condition regarding a change in waveform from at least two pieces of data stored in the buffer. Including a trigger processing step for performing a trigger processing for detecting the establishment,
The transmitter is
When the detection means is not performing the trigger process, in response to the input of the processing capacity data indicating the processing capacity of the control means, the waveform data stored in the buffer is converted to the processing capacity. The wireless data is transmitted to the external information processing apparatus with a data amount corresponding to the data amount,
When the detection means is performing the trigger process,
When the condition regarding the change of the waveform is not satisfied, the data stored in the buffer is not transmitted,
A waveform measurement display method comprising transmitting data stored in the buffer when it is detected that a condition relating to a change in waveform is satisfied. The condition relating to the change in the waveform is a trigger detection condition input together with the detection position data from the external information processing device,
The number of data that can be stored in the display storage unit is M,
The detection position is Y-th measured data among M data,
In the trigger processing step, the detection means compares the waveform data newly measured by the measurement unit with at least one of the Y-1 data measured before that to detect the trigger. To detect that the condition is met,
When the transmission unit detects that the condition relating to the waveform change is satisfied when the detection unit performs the trigger process, the transmission unit transmits Y data stored in the buffer at the time of detection. Along with this, the newly measured MY pieces of data are transmitted.
The waveform measurement display method according to claim 1, wherein the control unit displays the received M pieces of data on the display unit.   The control means is realized by using an application program, and the processing capacity data is newly received by deleting the data amount received by the receiving unit from the display storage unit. The waveform measurement display method according to claim 1, wherein the waveform measurement display method is defined by a process of adding additional data and input to the detection means. A measuring device for measuring a waveform,
A waveform measurement display system is configured with an external information processing device that displays a waveform measured by the measurement device,
A measurement unit for measuring the waveform;
A buffer for storing waveform data measured by the measurement unit;
A transmission unit for transmitting data stored in the buffer by wireless communication to the external information processing apparatus;
In response to the input of detection position data representing a detection position where trigger detection should be performed from the external information processing apparatus, a condition regarding a change in waveform is satisfied from at least two data stored in the buffer. Detecting means for performing trigger processing to detect,
The transmitter is
When the detection means is not performing the trigger processing, the waveform data stored in the buffer is processed in response to the input of the processing capability data representing the processing capability of the external information processing apparatus. Send to the external information processing device by wireless communication with the amount of data according to the capability,
When the detection means is performing the trigger process,
When the condition regarding the change of the waveform is not satisfied, the data stored in the buffer is not transmitted,
When it is detected that a condition relating to the change in waveform is satisfied, the data stored in the buffer is transmitted.

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