Electric drum stroke counting machine

This application is a continuation of Utility patent application Ser. No. 09/621,061 filed Jul. 21, 2000, now abandoned, entitled “Electronic Drum Stroke Counting Machine” which claims priority as a continuation of Provisional U.S. Patent Application Serial No. 60/144,740 filed Jul. 21, 1999, entitled “Electronic Drum Stroke Counting Machine.”

BACKGROUND OF THE INVENTION

The present invention relates to a musical testing device and more particularly to a drum beat counter attachable to a drum head. The speed of drum beating and stick speed has long been debated between drummers. A reliable method and apparatus for counting drum beats is needed to measure the drum beats or stick speed for drummers. Furthermore, drumming students need to practice speed and timing of drum beats to ensure that a cadence is being performed at the proper rate over time. Thus, what is needed is a drum beat counter to measure stick speed and drum beats over a time period for improved drumming information.

SUMMARY OF THE INVENTION

The present invention utilizes a piezo sensor attached to a drum head to count the number of beats on the drumhead. The piezo senses each time a drum stroke is made and sends a signal into drum beat counter which counts number of strokes. The preferred embodiment of the system only counts the drum beats occurring during a fixed period of time. The time period can be set to count down from any set time so that user can count the number of drum strokes occurring during the period of time. The following schematics, drawings, and parts lists explain in greater detail the operation of the machine.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1

is an assembly drawing of the drum beat counter attached to a conventional drum head.

FIG. 2

is an assembly drawing of the drum beat counter attached to an electronic drum head.

FIG. 3

is side view of the drum beat counter.

FIG. 4

is a schematic for the power supply.

FIG. 5

is a schematic view of the signal conditioner.

FIG. 6

is a schematic view of the additional connection for the edge trigger integrated circuit.

FIG. 7

is a schematic view for the drum beat timer.

FIG. 8

is a schematic for the drum beat counter.

FIG. 9

is a parts list for elements of the preferred embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The drum beat counter device or apparatus

100

is designed to measure the total number of strikes against a drum head

102

as a measurement of a drummer's hand or foot speed. The drum beat counter

100

measures the total number of strikes hit by a drummer onto a vibrating surface, such as a drum head

102

, during a controlled period of time. The device

100

is capable of application on both acoustic drums

104

and electronic drums

106

.

FIG. 1

of the drawings shows the drum beat counter apparatus

100

of the present invention mounted on an acoustic drum

104

. As shown in

FIG. 1

of the drawings, a piezo type strike sensor

108

is attached to a drum head

102

on an acoustic drum

104

or other vibrating surface to generate a strike signal in accordance with the vibrations created by the strikes on the drum head. The piezo sensor

108

is connected by a sensor cable

110

to the drum beat counter

100

. An optional portable connection through a guitar cable

112

, guitar jacks

113

, and female connector

114

is shown to allow for the piezo sensor

108

to be permanently mounted to the drum head

102

while allowing for removal of the drum beat counter

100

. The sensor cable

110

connects to the counter

100

through the drum input port

111

shown in FIG.

3

.

The front

116

of the drum beat counter

100

is shown which includes a information presenters such as a count information display

118

and a time information display

120

. The count display

118

is presented as a four digit digital display counter that corresponds to the number of counts detected by the drum beat counter

100

. The time display

120

is a two digit digital display which is used to show the current status of the timer as a counting time in seconds. Other types of information presenters and displays, such as LED meter displays, pie chart displays, or graphic display screens may also be utilized for visual displays, or sound devices such as speakers with a tone generator may be used for presenting the counting information to the user. Thus, the preferred embodiment's screen type display is merely a way to present the number of counts to the user in an easily recognizable format.

An on/off power switch

122

is provided for turning the counter

100

on and off, and the reset

124

is shown as a button for resetting the counter

100

. A time period selector

126

is shown as a preset dial selector for selecting the period of time to be used for the counting of the strikes.

The counter

100

uses an internal strike counter

152

to detect the number of beats or strikes on the drum head

102

and increments the drum beat count shown on the count display

118

by one for each strike. The preferred embodiment uses the preset dial selector

126

to set the time interval for counting between ten and ninety seconds at ten second intervals. While the present embodiment counts in ten second intervals, it is also envisioned that any other time interval, including one second intervals, could also be used without departing from the scope of this invention. The time is designed to count down from the pre-selected number, by decrementing the time period counter by one for each second on the time display

120

. The time allows for the counter

100

to begin counting upon the first drum beat and stops the counter

100

upon reaching zero seconds. Thus, when the timer reaches zero, the counter

100

will stop counting and will display the total number of strikes against the drum head during the countdown. Upon pressing the momentary reset button

124

on the front of the drum beat counter

100

, or applying the reset signal through the external rest port

128

, the counter will be rest to zero and the timer will reset according to the setting on the preset dial

124

. The above sequence may then be repeated for the next counting.

FIG. 2

shows the drum beat counter

100

attached to an electronic drum pad

106

by a sensor cable

110

with standard one quarter inch jack connectors

113

.

The side of the drum beat counter

100

is shown in

FIG. 3

which includes a drum input port

111

, an external reset port

128

and a power supply input

130

. The preferred embodiment of the device

100

uses a 9 volt power supply input and is designed to be powered by a 9 volt battery or external power supply.

FIG. 4

of the drawings shows the electrical schematic of the power supply

132

for the drum beat counter

100

. An external power supply (not shown) may provide a 9 to 12 volt signal for the counter

100

, which is then converted by the power supply

132

for internal operation. As is well known in the art of electronics, power supplies

132

may be designed to accept a multitude of inputs for presenting the appropriate output. Therefore, the present design

100

is shown as the preferred embodiment, but the invention is not meant to be limited by this design.

FIG. 5

of the drawings shows the strike signal filter as a debouncing circuit

134

for the output of the piezo sensor

108

to allow for counting the actual drum beats or strikes and not counting the after-beat vibrational reactions of the drum head

102

or sensor

108

. The piezo input signal

136

is combined by the signal combiner

140

with a digital reference signal

138

, generated by a signal generator, to provide a digital type combined signal for counting the number of drum beat strikes. Because the reference signal

138

provides an inherent limitation on the maximum number of strikes that may be counted by the counter, it is important that the digital reference signal

138

is operating at a sufficient clock rate to exceed the maximum number of strikes that the device

100

will need to detect. A clock rate for counting at least 40 strikes per second is recommended. Because drum heads

102

vibrate after the initial impact, it is also important to detect only the initial strike and not the subsequent vibrations of the drum head

102

. The combined signal passes through a signal filter

142

and then passes through a threshold trigger

144

that is used to detect only the impact vibration associated with the initial drum strike and not the subsequent vibrations. The current design shows the values selected for the preferred embodiment and the equipment as shown, but the threshold detector values

144

will change with the types of equipment that are used.

FIG. 6

of the drawings shows the remaining connections for the threshold edge trigger

144

for detecting the triggering event.

FIG. 7

of the drawings shows the timer

145

and the connections of the timing circuit

146

for providing the signal to the display controllers

148

and displays

150

as used on the front of the drum beat counter

100

. A known clock rate is reduced by a divide by-N type counter in the timing circuit

146

to equate to seconds as a second signal, and the second signal is then sent to the display driver

148

to drive the display

150

. The preset switch

126

is used to input an initial time equating to the number of seconds for the timer to count. The amount of time to count down or count up on the device can be set using a digital or analog switch for the preset switch

126

.

FIG. 8

of the drawings shows the counter

151

section of the drum beat counter

100

, including the strike counter

152

and display drivers

154

for the counter displays

156

used on the front of the drum beat counter

100

.

FIG. 9

shows the preferred values used for the circuit components shown in

FIGS. 4 through 8

.

Thus, although there have been described particular embodiments of the present invention of a new and useful Electric Drum Stroke Counting Machine, it is not intended that such references be construed as limitations upon the scope of this invention except as set forth in the following claims.