JP2013218075A - Alarm buzzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alarm buzzer that allows a user to select tone colors and volumes according to purposes with a simple composition.SOLUTION: The present invention is an alarm buzzer 10 that can output a plurality of types of tone colors and volumes according to settings comprises: a selection confirmation part 11 confirming ON/OFF of control lines for tone color and volume selection; a parameter generation part 12 generating waveform parameters according to the confirmed ON/OFF of the control lines; a waveform generation part 13 generating waveforms on the basis of the waveform parameters; and a sounding body 15 outputting the generated waveforms as sounds. Therefore, a user to select and customize tone colors and volumes according to purposes with a simple composition in which input from power supply input lines and tone color selection control lines is input to a small unit.

Description

  The present invention relates to an alarm buzzer that can output a plurality of types of timbre volumes according to settings.

  Conventionally, a buzzer for checking ON / OFF of a switch of an industrial device, an alarm device or the like is known. In such a buzzer, since the oscillator is composed of a combination of several gate circuits and discrete components, there is usually a situation where only one kind of tone color and volume can be generated in relation to the circuit scale that can be mounted. Therefore, if the buzzer for checking when an abnormality occurs is also used to check the ON / OFF status of the alarm device, a loud sound will be produced each time the switch is turned ON / OFF, causing problems such as surprised and annoying people around you. End up.

  In order to solve this problem and to generate several kinds of timbre volumes with one buzzer unit, the user may separately prepare an oscillator and a driver unit as a sound generator. In such a case, it is necessary for the user to design and prepare according to the specifications of the sounding body.

  On the other hand, a method for generating a buzzer with a combination of three parameters of the frequency of the oscillation pulse, the duty ratio of the oscillation pulse, and the pulse width of the trigger pulse has been proposed (for example, see Patent Document 1). Patent Document 1 also discloses that a buzzer is sounded only by a combination of on / off of trigger pulse generation and an oscillation pulse frequency parameter instead of the three parameters.

JP-A-8-188084

  However, Patent Document 1 does not describe a specific configuration or a method for the user to select a parameter, and the buzzer described in Patent Document 1 has a simple configuration and is easy to use for the user. I can't say that.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an alarm buzzer that allows a user to select a timbre volume with a simple configuration according to the purpose.

  (1) In order to achieve the above object, an alarm buzzer according to the present invention is an alarm buzzer capable of outputting a plurality of types of timbre volumes according to settings, and ON / OFF of a control line for selecting a timbre volume. A selection confirmation unit for confirming, a parameter generation unit for generating a waveform parameter according to ON / OFF of the confirmed control line, a waveform generation unit for generating a waveform based on the waveform parameter, and the generated And a sounding body that outputs a waveform as sound.

  As described above, the alarm buzzer of the present invention is configured so that the power input line and the timbre selection control line are input to one small unit so that the selection confirmation unit confirms ON / OFF of the timbre volume selection control line. With a simple configuration, the user can select the tone volume according to the purpose, and the tone volume can be customized.

  (2) Further, in the alarm buzzer according to the present invention, the parameter generation unit is configured to repeat ON / OFF time and cycle of two ports in one cycle in correspondence with ON / OFF of the confirmed control line. The number of times is generated as a waveform parameter. Thereby, a plurality of timbre volumes can be generated with a simple configuration.

  (3) Further, the alarm buzzer according to the present invention is characterized in that the control line for selecting the tone color volume is composed of two. Thereby, a buzzer capable of selecting four timbre volumes can be configured with a minimum configuration.

  According to the alarm buzzer of the present invention, the user can select the timbre volume according to the purpose with a simple configuration.

It is a block diagram which shows the electrical structure of the alarm buzzer which concerns on this invention. It is a perspective view which shows the external appearance of the alarm buzzer which concerns on this invention. It is a flowchart which shows operation | movement of the alarm buzzer which concerns on this invention. It is a figure which shows the example of the waveform produced | generated.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in order to facilitate understanding of the description, the same reference numerals are given to the same components in the respective drawings, and duplicate descriptions are omitted.

(Configuration of alarm buzzer)
FIG. 1 is a block diagram showing an electrical configuration of the alarm buzzer 10. In the figure, solid arrows indicate signal flows, and broken arrows indicate power supply voltage flows. The alarm buzzer 10 is configured to output a plurality of types of timbre volumes in accordance with user settings. As shown in FIG. 1, the alarm buzzer 10 includes a selection confirmation unit 11, a parameter generation unit 12, a waveform generation unit 13, a drive unit 14, a sound generator 15, and a DC / DC converter 15a.

  The selection confirmation unit 11 confirms ON / OFF of the control line for selecting the timbre volume. The control line is taken out to the outside and connected so as to be turned ON / OFF depending on which selection button that can be selected by the user is pressed. Thus, the timbre volume can be customized by allowing the user to select the timbre volume according to the purpose with a simple configuration in which the power input line and the timbre selection control line are input to one small unit.

  The parameter generation unit 12 generates a waveform parameter according to ON / OFF of the confirmed control line. For example, when two control lines are provided, the user can select a maximum of four types of sound generation by combinations of ON and OFF. The parameter generation unit 12 has first to nth parameter generation units for n types of sound generation types, and when there are four types of sound generation types as in the above example, the first to fourth parameters. A parameter corresponding to each pronunciation type is generated by the generation unit.

  The first to nth parameter generation units generate the ON and OFF times of two ports in one cycle and the number of repetitions of the cycle as waveform parameters in correspondence with the ON / OFF of the control line confirmed by the selection confirmation unit 11 To do. Thereby, a plurality of timbre volumes can be generated with a simple configuration.

  The waveform generation unit 13 generates a waveform based on the waveform parameter. Then, the generated waveform is output to the sound generator 15. Examples of parameters and waveforms will be described later. The drive unit 14 drives the sounding body 15 with the generated waveform and outputs the waveform. The drive unit 14 includes, for example, an inverter type gate driver IC with two circuits, and is configured as a circuit connected to the sounding body 15 via a current limiting resistor.

  The sound generator 15 outputs the waveform generated by the waveform generator 13 as sound. As the sounding body 15, for example, a bimorph type piezoelectric element is used. The sounding body 15 is preferably connected to the drive unit 14 by BTL connection. Thereby, an output voltage can be earned efficiently.

  Among the above, the selection confirmation unit 11, the parameter generation unit 12, and the waveform generation unit 13 corresponding to the oscillator can be configured by the function of the program written in the one-chip microcomputer. The program is written from the program write port. Since the program can be rewritten on the mounting board, the written program can be easily rewritten to a timbre volume program customized to the user's preference. The program can be written by the program writer after the board is completed. Since the program is short, it is preferable to create it in an assembler language.

  The DC / DC converter 15a stably supplies a power supply voltage. The power source is connected to the DC / DC converter 15a through a reverse connection breakdown prevention diode and an ON / OFF control transistor. The power supply voltage is boosted and stably output to the drive unit 14 by the DC / DC converter 15a. The selection confirmation unit 11, the parameter generation unit 12, and the waveform generation unit 13 are supplied after being stabilized to a relatively low voltage by a regulator.

  As described above, although the alarm buzzer 10 has more functions than the conventional product, the oscillator portion is a single one-chip microcomputer. As a result, the parts can be greatly reduced, and the circuit scale can be reduced and the cost can be reduced.

(Appearance of alarm buzzer)
FIG. 2 is a perspective view showing an appearance of the alarm buzzer 10. As shown in FIG. 2, the alarm buzzer 10 includes a buzzer body 16, power supply input lines 18a and 18b, and tone color volume selection control lines 19a and 19b. The buzzer body 16 is formed in a drum shape having a diameter of 40 to 60 mm and a height of about 15 to 25 mm.

  By taking out a part of the I / O wiring of the one-chip microcomputer, the user can select several kinds of tone colors by turning on / off the control lines 19a and 19b. Inside the buzzer body 16, a board having a one-chip microcomputer is installed, and the power input lines 18a and 18b and the control lines 19a and 19b are connected to the board. Such a one-chip configuration can reduce the number of components and reduce the cost.

  The timbre volume selection control lines 19a and 19b are preferably composed of two lines. Thereby, the tone color volume can be selected by turning ON / OFF the control lines 19a and 19b drawn from the buzzer body 16. In addition, a buzzer capable of selecting four timbre volumes can be configured with a minimum configuration. The tone volume can be customized according to the user's wishes. The control lines 19a and 19b are connected to, for example, a selection unit having four selection buttons, and ON / OFF is determined by the user.

In this way, several types of timbre volumes can be selected, and timbre volumes corresponding to the state can be used properly. For example, the timbre volume can be set in the following applications (1) to (3). The correspondence between the switch and the tone volume depends on the program that has been written.
(1) Switch ON / OFF confirmation for industrial equipment, alarm devices, etc .: Short confirmation sound with low volume (2) Confirmation when an abnormality occurs: Large alarm sound (3) Timer, device confirmation etc .: Low volume Gradually loud from

  An application example is also conceivable in which a large number of timbre volumes are used for each user's product with one type of buzzer. Such an alarm buzzer 10 can be used for various purposes such as prevention of theft of automobiles and motorcycles, operation state confirmation alarms for industrial robots, and crime prevention and disaster prevention alarms.

(Operation of alarm buzzer)
Next, the operation of the alarm buzzer 10 configured as described above will be described. FIG. 3 is a flowchart showing the operation of the alarm buzzer. First, the user selects timbre volume selection by turning on / off the control line (step S1). Next, a parameter is generated according to the confirmed result of the timbre volume selection (step S2).

  Then, according to the generated parameters, a waveform of the timbre volume selected by the user is generated (step S3), and the waveform is output to the sounding body 15 (step S4). As a result, the sound generator 15 generates a sound having a timbre volume determined by the waveform. It is determined whether the power is turned off (step S5). If it is ON, the process returns to step S1.

(Example of waveform generation)
As described above, the alarm buzzer 10 can generate a waveform using parameters generated in accordance with the user's selection. FIG. 4 is a diagram illustrating an example of a generated waveform. FIG. 4 shows one cycle during sound generation. In the example shown in FIG. 4, voltage control on the positive side and the negative side is performed separately using two ports P1 and P2 out of the four ports of the one-chip microcomputer, and a waveform is generated. With this control method, the sound pressure can be controlled by controlling the duty ratio between the ON time and the OFF time.

  The sound generation pattern can be set with three parameters of “ON time”, “OFF time”, and “number of repetitions”. First, the oscillation frequency is determined by the total time of the ON time and the OFF time, and 1 cycle = (ON time + OFF time) × 2. Therefore, frequency = 1 / ((ON time + OFF time) × 2). Also, oscillation time = (ON time + OFF time) × 2 × number of repetitions.

  In this way, after the waveform generation is completed, the same parameters may be used continuously. However, by changing the parameters and performing the subroutine from waveform generation to sound generation, special oscillation such as sweep and intermittent becomes possible. .

DESCRIPTION OF SYMBOLS 10 Alarm buzzer 11 Selection confirmation part 12 Parameter generation part 13 Waveform generation part 14 Drive part 15 Sounding body 15a DC / DC converter 16 Buzzer main body 18a, 18b Power input line 19a, 19b Control line

Claims (3)

An alarm buzzer that can output multiple types of timbre volume according to settings,
A selection confirmation unit for confirming ON / OFF of the control line for selecting the tone volume;
A parameter generator for generating a waveform parameter in accordance with ON / OFF of the confirmed control line;
A waveform generator for generating a waveform based on the waveform parameters;
A warning buzzer comprising: a sounding body that outputs the generated waveform as sound.   The parameter generation unit generates an ON time and an OFF time of two ports in one cycle and the number of repetitions of the cycle as waveform parameters in correspondence with ON / OFF of the confirmed control line. The alarm buzzer according to 1.   3. The alarm buzzer according to claim 1, wherein the timbre volume selection control line is composed of two lines.

Images