JPH0435322A - Wireless transmitter with voice operating function - Google Patents

Abstract

PURPOSE:To prevent malfunction due to ambient noise by collecting ambient sound converting the sound into an electric signal whose amplitude corresponds to a sound pressure level, and sending a wireless signal when the level of the electric signal exceeds a preset reference level. CONSTITUTION:A sensitivity regulation section 1 sets variably an operating level of a signal level discrimination section 106 to output a control signal for the transmission of a wireless signal and varies an amplification factor of a signal amplifier circuit 106a while the reference level of a signal level discrimination circuit 106a is made constant or varies a reference level of the circuit 106b while the amplification factor of the circuit 106a is made constant. Then malfunction is prevented by regulating the operating level of the signal level discrimination section 106 in response to the ambient noise level to improve the reliability. Moreover, a level display light 2b displaying the level of an electric signal outputted from the microphone M in response to the sound pres sure level, and a transmission display light P are provided to allow the voice level and the oscillation to be grasped visually, thereby improving the operability.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wireless transmitter having a voice activation function, and more specifically, the present invention relates to a wireless transmitter having a voice activation function, and more particularly, it is possible for even a person with a hand disability to easily transmit a message by emitting voice or the like. It is characterized in that it can be operated and the voice activation level can be varied.

[Prior Art] This type of wireless transmitter is used in a wireless notification system configured in combination with a wireless receiver, and when an operation switch on the transmitter side is operated, a wireless signal using weak radio waves is transmitted to the receiver side. The receiver side receives and recovers the wireless signal and issues the necessary call notifications.It is used in wireless chime systems to announce guests, etc., and wireless call systems in restaurants, etc.

FIG. 8 shows an example of the configuration of a wireless transmitter 100 used in such a wireless notification system.
a wireless transmitter 101 that transmits a wireless signal;
It includes an operation switch 102 that is operated when transmitting a wireless signal, and a signal processing section 103 that performs signal processing of each section.

Additionally, in this example, in order to prevent malfunctions caused by wireless signals transmitted from adjacent systems, a house code setting section 104 for setting a house code to be transmitted in addition to the wireless signal, and a house code setting section 104 for setting a house code to be transmitted in addition to the wireless signal are provided. The configuration includes an ID code setting section 105 that sets an ID code to be added to a wireless signal and transmitted in order to identify the device.

In a wireless notification system using such a wireless transmission@100, when the operation switch 102 of the wireless transmitter 100 is operated, the signal processing section 103 transmits transmission data with a house code and an ID code added as necessary to the wireless transmission section. 101, and the wireless transmitter 101 transmits a wireless signal whose high-frequency carrier wave is modulated by the transmission data from the transmitting antenna ANT (see 11 in FIGS. 9(a) and (b)), and transmits the transmitted wireless signal. is received and demodulated by a wireless receiver (not shown), and the necessary call notification is performed by outputting a ringing sound, so it is necessary to install a signal line between the transmitter 100 and the receiver. Construction is easy because there are no cracks.

However, in such a system, it is necessary to press the operation switch 102 of the wireless transmitter 100 in order to make a call notification, which is inconvenient for people with hand disabilities. In the invention filed on the same day, the present inventor proposed a wireless transmitter having a voice-activated function.

FIG. 10 shows an example of the configuration of a wireless transmitter 100' having the voice-activated function.
In addition to the operation switch 102 of 00 (operation switch 10
2) Microphone M and signal level determination unit 106
The same parts are given the same reference numerals and the explanation thereof will be omitted. In this transmitter 100', when a voice is emitted, an electric signal corresponding to the sound pressure level is output from the microphone M, and after this signal is amplified by the signal amplification circuit 106a of the signal level discrimination section 106, the signal level discrimination circuit 1
06b, and when the amplitude of the signal level is larger than the reference level, a control signal is output to the signal processing unit 103 to transmit a wireless signal (No. 111!1(a), b) Even people with limited mobility can easily make calls by simply speaking.

However, if such a wireless transmitter 100' is installed in a place with a lot of ambient noise,
As shown in C), the amplitude of the noise signal N is at the reference level L.
This leaves room for improvement since wireless signals may be transmitted due to noise signals and cause malfunctions.

[Invention tries to solve:! The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a wireless transmitter having a voice-activated function that allows transmitting wireless signals to be performed using voice or the like. In particular, an improvement over the invention filed on the same day is that the sound activation level can be adjusted to prevent malfunctions caused by surrounding noise.

[v! Means for Solving Problem 1] The present invention according to claim 1 proposed to achieve the above object collects surrounding sound and converts it into an electrical signal with an amplitude corresponding to the sound pressure level. a microphone; a signal level determining unit that transmits a wireless signal to the wireless receiver side when the electrical signal level output from the microphone exceeds a preset reference level; The configuration includes a sensitivity adjustment section that adjusts the operating level at which the signal is transmitted.

The sensitivity adjustment section in such a configuration has two configurations: one that changes the amplification factor of the input audio signal while keeping the reference level of the signal level discrimination section constant, and the other that changes the amplification factor of the input audio signal while keeping the reference level constant. , a configuration can be implemented that changes the reference level.

The present invention according to claim 2 includes the configuration according to claim 1,
The configuration further includes a signal level display section having a signal level indicator light that lights up in accordance with the level of the electrical signal output from the microphone.

The present invention according to claim 3 includes the configuration according to claim 1,
The configuration further includes a transmission indicator light that lights up when a wireless signal is transmitted.

[Operations] In the present invention as set forth in claim 1, when the transmitter is installed in a place where the ambient noise level is high, the noise signal level applied from the microphone to the signal level discriminator increases. The operation level of the signal level discriminator is set high to prevent erroneous transmission operations from occurring due to ambient noise. By setting in this way, it is possible to perform a transmission operation when a voice signal with a sound pressure level higher than the ambient noise level is input manually.

In addition, when installing the transmitter in a place where the ambient noise level is low, the noise signal level applied from the microphone to the signal level discriminator will decrease, so the sensitivity adjustment section will adjust the operating level of the signal level discriminator depending on the ambient noise. Reduce it to a level that does not cause erroneous transmission operations. With this setting, the calling operation can be performed with a low voice.

In the present invention according to claim 2, when an electric signal is output from the microphone according to the sound pressure level, this electric signal is transmitted to the signal level display section, and the signal level indicator light is turned on according to the signal level. . This allows the user to visually determine the ambient noise level and the voice level required to perform the call operation.

In the present invention as set forth in claim 3, when a transmission operation is performed, the transmission indicator lamp lights up.

[Example code] The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of the configuration of a wireless transmitter A of the present invention according to claim 1, which has a configuration in which a sensitivity adjustment section 1 is further added to the wireless transmitter 100' described above. Therefore, the same parts are given the same reference numerals and the explanation will be omitted. Note that P is a transmission indicator light that lights up when transmitting a wireless signal (corresponding to Ill requirement 3).The sensitivity adjustment section 1 outputs a control signal in the signal level determination section 106 in order to transmit a wireless signal. The signal level determination unit 106
The reference level of the signal level discriminating circuit 106b is changed while the amplification factor of the signal amplifying circuit 106a is kept constant. It is possible to implement a configuration that changes the .

FIG. 2 shows a signal amplifier circuit 106a in such a configuration.
This figure shows a configuration in which the amplification factor of the signal amplification circuit 106a is varied by the amplification factor adjustment circuit 1a of the sensitivity adjustment section 1 while the reference level of the signal level discrimination circuit 106b is fixed at L. I try to do that. In this configuration, as shown in the waveform diagrams of FIGS. 3(a) to 3(c), when the ambient noise level is high and the noise signal level amplified by the signal amplification circuit 106a exceeds the reference level L, the As shown in the waveform diagrams in FIGS. 3(d) and (e), the amplification factor adjustment circuit 'i81a lowers the amplification factor of the signal amplification circuit 106a, thereby reducing the signal level applied to the signal level discrimination circuit 106b. This makes it possible to prevent malfunctions due to noise.

Moreover, FIG. 4 shows a configuration in which the reference level of the signal level discrimination circuit 108b is changed among the configurations described above, in which the amplification factor of the signal amplification circuit 106a is fixed and the sensitivity adjustment section 1 is changed. The reference level of the signal level discrimination circuit 106b is varied by the reference level adjustment circuit g11a'.

In such a configuration, when the ambient noise level is high and the noise signal level N amplified by the signal amplification circuit 106a exceeds the reference level L1 (Fig. 5 (a) to (
C)), the reference level of the signal level discrimination circuit]08b is increased from Ll to L2 by the reference level adjustment circuit wsla', thereby preventing malfunctions due to noise (Fig. 5(b) to (d)). )three@).

In this manner, by adjusting the operating level of the signal level discriminator 10B with the sensitivity adjuster 1 according to the ambient noise level, malfunctions can be prevented and reliability can be improved.

In the present invention, as shown in FIG. 1, the wireless transmitter 101 includes an oscillation circuit 101a that oscillates using a crystal oscillator X, and a frequency multiplier circuit 101b that multiplies the frequency of the original oscillation signal of the oscillation circuit 101a. , signal processing section 103
It has a modulation circuit 101c that modulates a high frequency carrier wave multiplied by the transmission data transmitted from the transmitter, and a power amplification circuit 101d that amplifies the power of the modulated high frequency signal and transmits it from the transmitting antenna ANT. When a control signal is output from the level determination circuit 106b, power is supplied from the signal processing section 103 to each section of the wireless transmission section 101.

I! FIG. 6 shows an example of the configuration of the wireless transmitter A' of the present invention as set forth in claim 2.
Furthermore, a signal level display section 2 is added, which has a signal level indicator light 2b and an indicator light drive circuit 2a that display the amplitude level of the electrical signal output from the microphone in accordance with the sound pressure level. Since the other configurations are the same, the same reference numerals are given and the description thereof will be omitted.

In this transmission 11A', when the audio signal outputted from the microphone M and amplified by the signal amplification circuit 106a of the signal level determination unit 10B is applied to the indicator light drive circuit 2a, a number of signal level displays corresponding to the audio signal level are displayed. Since the light 2b is turned on for display (in this embodiment, the number of indicator lights corresponding to the peak level of the audio signal is turned on).
, the ambient noise level can be visually determined based on the lighting status of the signal level indicator lamp 2b, and by manually inputting audio signals while observing the lighting status of the transmission indicator lamp P and the signal level indicator lamp 2b, it is possible to control the dialing operation. The required audio level can be visually grasped, and operability can be improved.

In addition, when sensitivity adjustment is performed by changing the amplification factor of the signal amplification port M106a, the display on the signal level display section 2 changes according to the change in the amplification factor, so the audio signal output from the microphone is The signal may be amplified by a separately provided amplifier circuit (not shown) and then added to the signal level display section 2.

71st! I shows an example of the external appearance of a wireless caller 11A' used in a wireless call system, in which an operation switch 102 is provided at the top of the approximately cylindrical body, and a microphone M and a caller indicator light are provided on the side. P, a sensitivity adjustment volume VR of the sensitivity adjustment section l, and a signal level indicator light 2b are provided, and wireless signals can be transmitted by manual and voice operations.

2, according to the wireless transmitter A' of the present invention,
Since the audio level can be visually detected using the signal level indicator, adjust the sensitivity adjustment volume VR to prevent malfunctions caused by ambient noise before turning on the transmission indicator P and signal level indicator 2b. By adding audio to the microphone so that it is higher than the noise level while checking the status, it becomes possible to visually and easily grasp the audio level required to perform a stable transmission operation.

The above-mentioned wireless transmitters A and A" are polarization diversity antennas that alternately transmit transmission signals from the power amplification circuit 101d of the wireless transmitter 101 to two antennas with different polarization planes for transmission. It is also possible to adopt a configuration such that the receiver side can stably receive wireless signals.

[Effects of the Invention] According to the present invention as set forth in claim 1, even a hand-impaired person can easily make a call by making a sound, and furthermore, by adjusting the sensitivity, it is possible to easily make a call by making a sound, and by adjusting the sensitivity, it is possible to easily make a call by making a sound. Since malfunctions can be prevented, it is possible to provide a wireless transmitter with a voice-activated function with improved operability and reliability.

According to the present invention described in claim 2, in addition to the effect of claim 1, the audio level can be visually recognized by the signal level indicator, so that the audio level required for the calling operation can be visually and easily grasped. - Layer operability can be improved.

According to the present invention as set forth in claim 3, since it is immediately known by the transmission indicator light that a transmission operation has been performed, there is no need to confirm the transmission by the notification sound of the wireless receiver, thereby improving operability. I can do it.

[Brief explanation of drawings]

11th! 1 is a configuration example diagram of the present invention described in claim 1, No. 21! I is an example diagram when adjusting the sensitivity, 3rd Q!
1(a) to (e) are waveform diagrams explaining the operation, No. 41
! I is a transitory diagram when performing sensitivity adjustment, Figures 5 (a) to (
e) is a waveform diagram explaining its operation, FIG. 6 is a configuration example diagram of the present invention according to claim 2, FIG. 7 is a perspective view showing its appearance, and FIG. 8 is a diagram of a conventional wireless transmitter. Configuration example diagram,
Figure 9(a). (b) is a time chart explaining the operation, FIG. 10 is a block diagram of the invention filed on the same day as the present invention, FIG. 11 is a time chart explaining the operation, and FIGS. 12 (&) to (C)
is a waveform diagram illustrating malfunctions caused by PII ambient noise. [Description of symbols] 1...Sensitivity adjustment section 2...Signal level display section 2b...Signal level indicator lamp 106...Signal level discrimination section A, A'...Wireless transmitter M... Microphone P...Call indicator light

Claims (3)

[Claims] (1) A wireless transmitter with a voice activation function used in a wireless notification system that transmits a wireless signal to a separately placed wireless receiver to notify a call, and which collects surrounding sounds. a microphone that converts the signal into an electrical signal with an amplitude corresponding to the sound pressure level; and a microphone that transmits a wireless signal to the wireless receiver when the electrical signal level output from the microphone exceeds a preset reference level. What is claimed is: 1. A wireless transmitter having a voice-activated function, comprising: a signal level discriminating section that causes the signal level discriminating section to transmit the wireless signal; and a sensitivity adjusting section that adjusts the operating level at which the signal level discriminating section causes the wireless signal to be transmitted. (2) The audio-activated function according to claim 1, further comprising a signal level display unit having a signal level indicator light that lights up in accordance with the electrical signal level output from the microphone. wireless transmitter. (3) The wireless transmitter having a voice-activated function according to claim 1, further comprising a transmission indicator light that lights up when the wireless signal is transmitted.